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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-04 11:20:14 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-04 11:20:14 -0500
commit9bb676966aa85e56af00b353387d3c274a26e480 (patch)
treecafc9a409aa05cc9060eb53f03c35881f41b6cec /drivers/dma
parent0f2cc4ecd81dc1917a041dc93db0ada28f8356fa (diff)
parentdd58ffcf5a5352fc10820c8ffbcd5fed416a2c3a (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (28 commits) ioat: cleanup ->timer_fn() and ->cleanup_fn() prototypes ioat3: interrupt coalescing ioat: close potential BUG_ON race in the descriptor cleanup path ioat2: kill pending flag ioat3: use ioat2_quiesce() ioat3: cleanup, don't enable DCA completion writes DMAENGINE: COH 901 318 lli sg offset fix DMAENGINE: COH 901 318 configure channel direction DMAENGINE: COH 901 318 remove irq counting DMAENGINE: COH 901 318 descriptor pool refactoring DMAENGINE: COH 901 318 cleanups dma: Add MPC512x DMA driver Debugging options for the DMA engine subsystem iop-adma: redundant/wrong tests in iop_*_count()? dmatest: fix handling of an even number of xor_sources dmatest: correct raid6 PQ test fsldma: Fix cookie issues fsldma: Fix cookie issues dma: cases IPU_PIX_FMT_BGRA32, BGR32 and ABGR32 are the same in ipu_ch_param_set_size() dma: make Open Firmware device id constant ...
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/Kconfig23
-rw-r--r--drivers/dma/Makefile8
-rw-r--r--drivers/dma/coh901318.c182
-rw-r--r--drivers/dma/coh901318_lli.c23
-rw-r--r--drivers/dma/dmatest.c8
-rw-r--r--drivers/dma/fsldma.c1177
-rw-r--r--drivers/dma/fsldma.h35
-rw-r--r--drivers/dma/ioat/dma.c46
-rw-r--r--drivers/dma/ioat/dma.h11
-rw-r--r--drivers/dma/ioat/dma_v2.c70
-rw-r--r--drivers/dma/ioat/dma_v2.h6
-rw-r--r--drivers/dma/ioat/dma_v3.c64
-rw-r--r--drivers/dma/ioat/registers.h2
-rw-r--r--drivers/dma/ipu/ipu_idmac.c15
-rw-r--r--drivers/dma/mpc512x_dma.c800
-rw-r--r--drivers/dma/ppc4xx/adma.c2
16 files changed, 1702 insertions, 770 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index e02d74b1e892..c27f80e5d531 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -13,6 +13,22 @@ menuconfig DMADEVICES
13 DMA Device drivers supported by the configured arch, it may 13 DMA Device drivers supported by the configured arch, it may
14 be empty in some cases. 14 be empty in some cases.
15 15
16config DMADEVICES_DEBUG
17 bool "DMA Engine debugging"
18 depends on DMADEVICES != n
19 help
20 This is an option for use by developers; most people should
21 say N here. This enables DMA engine core and driver debugging.
22
23config DMADEVICES_VDEBUG
24 bool "DMA Engine verbose debugging"
25 depends on DMADEVICES_DEBUG != n
26 help
27 This is an option for use by developers; most people should
28 say N here. This enables deeper (more verbose) debugging of
29 the DMA engine core and drivers.
30
31
16if DMADEVICES 32if DMADEVICES
17 33
18comment "DMA Devices" 34comment "DMA Devices"
@@ -69,6 +85,13 @@ config FSL_DMA
69 The Elo is the DMA controller on some 82xx and 83xx parts, and the 85 The Elo is the DMA controller on some 82xx and 83xx parts, and the
70 Elo Plus is the DMA controller on 85xx and 86xx parts. 86 Elo Plus is the DMA controller on 85xx and 86xx parts.
71 87
88config MPC512X_DMA
89 tristate "Freescale MPC512x built-in DMA engine support"
90 depends on PPC_MPC512x
91 select DMA_ENGINE
92 ---help---
93 Enable support for the Freescale MPC512x built-in DMA engine.
94
72config MV_XOR 95config MV_XOR
73 bool "Marvell XOR engine support" 96 bool "Marvell XOR engine support"
74 depends on PLAT_ORION 97 depends on PLAT_ORION
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 807053d48232..22bba3d5e2b6 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -1,9 +1,17 @@
1ifeq ($(CONFIG_DMADEVICES_DEBUG),y)
2 EXTRA_CFLAGS += -DDEBUG
3endif
4ifeq ($(CONFIG_DMADEVICES_VDEBUG),y)
5 EXTRA_CFLAGS += -DVERBOSE_DEBUG
6endif
7
1obj-$(CONFIG_DMA_ENGINE) += dmaengine.o 8obj-$(CONFIG_DMA_ENGINE) += dmaengine.o
2obj-$(CONFIG_NET_DMA) += iovlock.o 9obj-$(CONFIG_NET_DMA) += iovlock.o
3obj-$(CONFIG_DMATEST) += dmatest.o 10obj-$(CONFIG_DMATEST) += dmatest.o
4obj-$(CONFIG_INTEL_IOATDMA) += ioat/ 11obj-$(CONFIG_INTEL_IOATDMA) += ioat/
5obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o 12obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
6obj-$(CONFIG_FSL_DMA) += fsldma.o 13obj-$(CONFIG_FSL_DMA) += fsldma.o
14obj-$(CONFIG_MPC512X_DMA) += mpc512x_dma.o
7obj-$(CONFIG_MV_XOR) += mv_xor.o 15obj-$(CONFIG_MV_XOR) += mv_xor.o
8obj-$(CONFIG_DW_DMAC) += dw_dmac.o 16obj-$(CONFIG_DW_DMAC) += dw_dmac.o
9obj-$(CONFIG_AT_HDMAC) += at_hdmac.o 17obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 64a937262a40..1656fdcdb6c2 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -39,7 +39,6 @@ struct coh901318_desc {
39 unsigned int sg_len; 39 unsigned int sg_len;
40 struct coh901318_lli *data; 40 struct coh901318_lli *data;
41 enum dma_data_direction dir; 41 enum dma_data_direction dir;
42 int pending_irqs;
43 unsigned long flags; 42 unsigned long flags;
44}; 43};
45 44
@@ -72,7 +71,6 @@ struct coh901318_chan {
72 71
73 unsigned long nbr_active_done; 72 unsigned long nbr_active_done;
74 unsigned long busy; 73 unsigned long busy;
75 int pending_irqs;
76 74
77 struct coh901318_base *base; 75 struct coh901318_base *base;
78}; 76};
@@ -80,18 +78,16 @@ struct coh901318_chan {
80static void coh901318_list_print(struct coh901318_chan *cohc, 78static void coh901318_list_print(struct coh901318_chan *cohc,
81 struct coh901318_lli *lli) 79 struct coh901318_lli *lli)
82{ 80{
83 struct coh901318_lli *l; 81 struct coh901318_lli *l = lli;
84 dma_addr_t addr = virt_to_phys(lli);
85 int i = 0; 82 int i = 0;
86 83
87 while (addr) { 84 while (l) {
88 l = phys_to_virt(addr);
89 dev_vdbg(COHC_2_DEV(cohc), "i %d, lli %p, ctrl 0x%x, src 0x%x" 85 dev_vdbg(COHC_2_DEV(cohc), "i %d, lli %p, ctrl 0x%x, src 0x%x"
90 ", dst 0x%x, link 0x%x link_virt 0x%p\n", 86 ", dst 0x%x, link 0x%x virt_link_addr 0x%p\n",
91 i, l, l->control, l->src_addr, l->dst_addr, 87 i, l, l->control, l->src_addr, l->dst_addr,
92 l->link_addr, phys_to_virt(l->link_addr)); 88 l->link_addr, l->virt_link_addr);
93 i++; 89 i++;
94 addr = l->link_addr; 90 l = l->virt_link_addr;
95 } 91 }
96} 92}
97 93
@@ -125,7 +121,7 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf,
125 goto err_kmalloc; 121 goto err_kmalloc;
126 tmp = dev_buf; 122 tmp = dev_buf;
127 123
128 tmp += sprintf(tmp, "DMA -- enable dma channels\n"); 124 tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
129 125
130 for (i = 0; i < debugfs_dma_base->platform->max_channels; i++) 126 for (i = 0; i < debugfs_dma_base->platform->max_channels; i++)
131 if (started_channels & (1 << i)) 127 if (started_channels & (1 << i))
@@ -337,16 +333,22 @@ coh901318_desc_get(struct coh901318_chan *cohc)
337 * TODO: alloc a pile of descs instead of just one, 333 * TODO: alloc a pile of descs instead of just one,
338 * avoid many small allocations. 334 * avoid many small allocations.
339 */ 335 */
340 desc = kmalloc(sizeof(struct coh901318_desc), GFP_NOWAIT); 336 desc = kzalloc(sizeof(struct coh901318_desc), GFP_NOWAIT);
341 if (desc == NULL) 337 if (desc == NULL)
342 goto out; 338 goto out;
343 INIT_LIST_HEAD(&desc->node); 339 INIT_LIST_HEAD(&desc->node);
340 dma_async_tx_descriptor_init(&desc->desc, &cohc->chan);
344 } else { 341 } else {
345 /* Reuse an old desc. */ 342 /* Reuse an old desc. */
346 desc = list_first_entry(&cohc->free, 343 desc = list_first_entry(&cohc->free,
347 struct coh901318_desc, 344 struct coh901318_desc,
348 node); 345 node);
349 list_del(&desc->node); 346 list_del(&desc->node);
347 /* Initialize it a bit so it's not insane */
348 desc->sg = NULL;
349 desc->sg_len = 0;
350 desc->desc.callback = NULL;
351 desc->desc.callback_param = NULL;
350 } 352 }
351 353
352 out: 354 out:
@@ -364,10 +366,6 @@ static void
364coh901318_desc_submit(struct coh901318_chan *cohc, struct coh901318_desc *desc) 366coh901318_desc_submit(struct coh901318_chan *cohc, struct coh901318_desc *desc)
365{ 367{
366 list_add_tail(&desc->node, &cohc->active); 368 list_add_tail(&desc->node, &cohc->active);
367
368 BUG_ON(cohc->pending_irqs != 0);
369
370 cohc->pending_irqs = desc->pending_irqs;
371} 369}
372 370
373static struct coh901318_desc * 371static struct coh901318_desc *
@@ -592,6 +590,10 @@ static struct coh901318_desc *coh901318_queue_start(struct coh901318_chan *cohc)
592 return cohd_que; 590 return cohd_que;
593} 591}
594 592
593/*
594 * This tasklet is called from the interrupt handler to
595 * handle each descriptor (DMA job) that is sent to a channel.
596 */
595static void dma_tasklet(unsigned long data) 597static void dma_tasklet(unsigned long data)
596{ 598{
597 struct coh901318_chan *cohc = (struct coh901318_chan *) data; 599 struct coh901318_chan *cohc = (struct coh901318_chan *) data;
@@ -600,55 +602,58 @@ static void dma_tasklet(unsigned long data)
600 dma_async_tx_callback callback; 602 dma_async_tx_callback callback;
601 void *callback_param; 603 void *callback_param;
602 604
605 dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d"
606 " nbr_active_done %ld\n", __func__,
607 cohc->id, cohc->nbr_active_done);
608
603 spin_lock_irqsave(&cohc->lock, flags); 609 spin_lock_irqsave(&cohc->lock, flags);
604 610
605 /* get first active entry from list */ 611 /* get first active descriptor entry from list */
606 cohd_fin = coh901318_first_active_get(cohc); 612 cohd_fin = coh901318_first_active_get(cohc);
607 613
608 BUG_ON(cohd_fin->pending_irqs == 0);
609
610 if (cohd_fin == NULL) 614 if (cohd_fin == NULL)
611 goto err; 615 goto err;
612 616
613 cohd_fin->pending_irqs--; 617 /* locate callback to client */
614 cohc->completed = cohd_fin->desc.cookie; 618 callback = cohd_fin->desc.callback;
619 callback_param = cohd_fin->desc.callback_param;
615 620
616 if (cohc->nbr_active_done == 0) 621 /* sign this job as completed on the channel */
617 return; 622 cohc->completed = cohd_fin->desc.cookie;
618 623
619 if (!cohd_fin->pending_irqs) { 624 /* release the lli allocation and remove the descriptor */
620 /* release the lli allocation*/ 625 coh901318_lli_free(&cohc->base->pool, &cohd_fin->data);
621 coh901318_lli_free(&cohc->base->pool, &cohd_fin->data);
622 }
623 626
624 dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d pending_irqs %d" 627 /* return desc to free-list */
625 " nbr_active_done %ld\n", __func__, 628 coh901318_desc_remove(cohd_fin);
626 cohc->id, cohc->pending_irqs, cohc->nbr_active_done); 629 coh901318_desc_free(cohc, cohd_fin);
627 630
628 /* callback to client */ 631 spin_unlock_irqrestore(&cohc->lock, flags);
629 callback = cohd_fin->desc.callback;
630 callback_param = cohd_fin->desc.callback_param;
631
632 if (!cohd_fin->pending_irqs) {
633 coh901318_desc_remove(cohd_fin);
634 632
635 /* return desc to free-list */ 633 /* Call the callback when we're done */
636 coh901318_desc_free(cohc, cohd_fin); 634 if (callback)
637 } 635 callback(callback_param);
638 636
639 if (cohc->nbr_active_done) 637 spin_lock_irqsave(&cohc->lock, flags);
640 cohc->nbr_active_done--;
641 638
639 /*
640 * If another interrupt fired while the tasklet was scheduling,
641 * we don't get called twice, so we have this number of active
642 * counter that keep track of the number of IRQs expected to
643 * be handled for this channel. If there happen to be more than
644 * one IRQ to be ack:ed, we simply schedule this tasklet again.
645 */
646 cohc->nbr_active_done--;
642 if (cohc->nbr_active_done) { 647 if (cohc->nbr_active_done) {
648 dev_dbg(COHC_2_DEV(cohc), "scheduling tasklet again, new IRQs "
649 "came in while we were scheduling this tasklet\n");
643 if (cohc_chan_conf(cohc)->priority_high) 650 if (cohc_chan_conf(cohc)->priority_high)
644 tasklet_hi_schedule(&cohc->tasklet); 651 tasklet_hi_schedule(&cohc->tasklet);
645 else 652 else
646 tasklet_schedule(&cohc->tasklet); 653 tasklet_schedule(&cohc->tasklet);
647 } 654 }
648 spin_unlock_irqrestore(&cohc->lock, flags);
649 655
650 if (callback) 656 spin_unlock_irqrestore(&cohc->lock, flags);
651 callback(callback_param);
652 657
653 return; 658 return;
654 659
@@ -667,16 +672,17 @@ static void dma_tc_handle(struct coh901318_chan *cohc)
667 if (!cohc->allocated) 672 if (!cohc->allocated)
668 return; 673 return;
669 674
670 BUG_ON(cohc->pending_irqs == 0); 675 spin_lock(&cohc->lock);
671 676
672 cohc->pending_irqs--;
673 cohc->nbr_active_done++; 677 cohc->nbr_active_done++;
674 678
675 if (cohc->pending_irqs == 0 && coh901318_queue_start(cohc) == NULL) 679 if (coh901318_queue_start(cohc) == NULL)
676 cohc->busy = 0; 680 cohc->busy = 0;
677 681
678 BUG_ON(list_empty(&cohc->active)); 682 BUG_ON(list_empty(&cohc->active));
679 683
684 spin_unlock(&cohc->lock);
685
680 if (cohc_chan_conf(cohc)->priority_high) 686 if (cohc_chan_conf(cohc)->priority_high)
681 tasklet_hi_schedule(&cohc->tasklet); 687 tasklet_hi_schedule(&cohc->tasklet);
682 else 688 else
@@ -870,6 +876,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
870 struct coh901318_chan *cohc = to_coh901318_chan(chan); 876 struct coh901318_chan *cohc = to_coh901318_chan(chan);
871 int lli_len; 877 int lli_len;
872 u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last; 878 u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
879 int ret;
873 880
874 spin_lock_irqsave(&cohc->lock, flg); 881 spin_lock_irqsave(&cohc->lock, flg);
875 882
@@ -890,22 +897,19 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
890 if (data == NULL) 897 if (data == NULL)
891 goto err; 898 goto err;
892 899
893 cohd = coh901318_desc_get(cohc); 900 ret = coh901318_lli_fill_memcpy(
894 cohd->sg = NULL; 901 &cohc->base->pool, data, src, size, dest,
895 cohd->sg_len = 0; 902 cohc_chan_param(cohc)->ctrl_lli_chained,
896 cohd->data = data; 903 ctrl_last);
897 904 if (ret)
898 cohd->pending_irqs = 905 goto err;
899 coh901318_lli_fill_memcpy(
900 &cohc->base->pool, data, src, size, dest,
901 cohc_chan_param(cohc)->ctrl_lli_chained,
902 ctrl_last);
903 cohd->flags = flags;
904 906
905 COH_DBG(coh901318_list_print(cohc, data)); 907 COH_DBG(coh901318_list_print(cohc, data));
906 908
907 dma_async_tx_descriptor_init(&cohd->desc, chan); 909 /* Pick a descriptor to handle this transfer */
908 910 cohd = coh901318_desc_get(cohc);
911 cohd->data = data;
912 cohd->flags = flags;
909 cohd->desc.tx_submit = coh901318_tx_submit; 913 cohd->desc.tx_submit = coh901318_tx_submit;
910 914
911 spin_unlock_irqrestore(&cohc->lock, flg); 915 spin_unlock_irqrestore(&cohc->lock, flg);
@@ -924,6 +928,7 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
924 struct coh901318_chan *cohc = to_coh901318_chan(chan); 928 struct coh901318_chan *cohc = to_coh901318_chan(chan);
925 struct coh901318_lli *data; 929 struct coh901318_lli *data;
926 struct coh901318_desc *cohd; 930 struct coh901318_desc *cohd;
931 const struct coh901318_params *params;
927 struct scatterlist *sg; 932 struct scatterlist *sg;
928 int len = 0; 933 int len = 0;
929 int size; 934 int size;
@@ -931,7 +936,9 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
931 u32 ctrl_chained = cohc_chan_param(cohc)->ctrl_lli_chained; 936 u32 ctrl_chained = cohc_chan_param(cohc)->ctrl_lli_chained;
932 u32 ctrl = cohc_chan_param(cohc)->ctrl_lli; 937 u32 ctrl = cohc_chan_param(cohc)->ctrl_lli;
933 u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last; 938 u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
939 u32 config;
934 unsigned long flg; 940 unsigned long flg;
941 int ret;
935 942
936 if (!sgl) 943 if (!sgl)
937 goto out; 944 goto out;
@@ -947,15 +954,14 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
947 /* Trigger interrupt after last lli */ 954 /* Trigger interrupt after last lli */
948 ctrl_last |= COH901318_CX_CTRL_TC_IRQ_ENABLE; 955 ctrl_last |= COH901318_CX_CTRL_TC_IRQ_ENABLE;
949 956
950 cohd = coh901318_desc_get(cohc); 957 params = cohc_chan_param(cohc);
951 cohd->sg = NULL; 958 config = params->config;
952 cohd->sg_len = 0;
953 cohd->dir = direction;
954 959
955 if (direction == DMA_TO_DEVICE) { 960 if (direction == DMA_TO_DEVICE) {
956 u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE | 961 u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
957 COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE; 962 COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE;
958 963
964 config |= COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY;
959 ctrl_chained |= tx_flags; 965 ctrl_chained |= tx_flags;
960 ctrl_last |= tx_flags; 966 ctrl_last |= tx_flags;
961 ctrl |= tx_flags; 967 ctrl |= tx_flags;
@@ -963,16 +969,14 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
963 u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST | 969 u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST |
964 COH901318_CX_CTRL_DST_ADDR_INC_ENABLE; 970 COH901318_CX_CTRL_DST_ADDR_INC_ENABLE;
965 971
972 config |= COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY;
966 ctrl_chained |= rx_flags; 973 ctrl_chained |= rx_flags;
967 ctrl_last |= rx_flags; 974 ctrl_last |= rx_flags;
968 ctrl |= rx_flags; 975 ctrl |= rx_flags;
969 } else 976 } else
970 goto err_direction; 977 goto err_direction;
971 978
972 dma_async_tx_descriptor_init(&cohd->desc, chan); 979 coh901318_set_conf(cohc, config);
973
974 cohd->desc.tx_submit = coh901318_tx_submit;
975
976 980
977 /* The dma only supports transmitting packages up to 981 /* The dma only supports transmitting packages up to
978 * MAX_DMA_PACKET_SIZE. Calculate to total number of 982 * MAX_DMA_PACKET_SIZE. Calculate to total number of
@@ -994,32 +998,37 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
994 len += factor; 998 len += factor;
995 } 999 }
996 1000
1001 pr_debug("Allocate %d lli:s for this transfer\n", len);
997 data = coh901318_lli_alloc(&cohc->base->pool, len); 1002 data = coh901318_lli_alloc(&cohc->base->pool, len);
998 1003
999 if (data == NULL) 1004 if (data == NULL)
1000 goto err_dma_alloc; 1005 goto err_dma_alloc;
1001 1006
1002 /* initiate allocated data list */ 1007 /* initiate allocated data list */
1003 cohd->pending_irqs = 1008 ret = coh901318_lli_fill_sg(&cohc->base->pool, data, sgl, sg_len,
1004 coh901318_lli_fill_sg(&cohc->base->pool, data, sgl, sg_len, 1009 cohc_dev_addr(cohc),
1005 cohc_dev_addr(cohc), 1010 ctrl_chained,
1006 ctrl_chained, 1011 ctrl,
1007 ctrl, 1012 ctrl_last,
1008 ctrl_last, 1013 direction, COH901318_CX_CTRL_TC_IRQ_ENABLE);
1009 direction, COH901318_CX_CTRL_TC_IRQ_ENABLE); 1014 if (ret)
1010 cohd->data = data; 1015 goto err_lli_fill;
1011
1012 cohd->flags = flags;
1013 1016
1014 COH_DBG(coh901318_list_print(cohc, data)); 1017 COH_DBG(coh901318_list_print(cohc, data));
1015 1018
1019 /* Pick a descriptor to handle this transfer */
1020 cohd = coh901318_desc_get(cohc);
1021 cohd->dir = direction;
1022 cohd->flags = flags;
1023 cohd->desc.tx_submit = coh901318_tx_submit;
1024 cohd->data = data;
1025
1016 spin_unlock_irqrestore(&cohc->lock, flg); 1026 spin_unlock_irqrestore(&cohc->lock, flg);
1017 1027
1018 return &cohd->desc; 1028 return &cohd->desc;
1029 err_lli_fill:
1019 err_dma_alloc: 1030 err_dma_alloc:
1020 err_direction: 1031 err_direction:
1021 coh901318_desc_remove(cohd);
1022 coh901318_desc_free(cohc, cohd);
1023 spin_unlock_irqrestore(&cohc->lock, flg); 1032 spin_unlock_irqrestore(&cohc->lock, flg);
1024 out: 1033 out:
1025 return NULL; 1034 return NULL;
@@ -1092,9 +1101,8 @@ coh901318_terminate_all(struct dma_chan *chan)
1092 /* release the lli allocation*/ 1101 /* release the lli allocation*/
1093 coh901318_lli_free(&cohc->base->pool, &cohd->data); 1102 coh901318_lli_free(&cohc->base->pool, &cohd->data);
1094 1103
1095 coh901318_desc_remove(cohd);
1096
1097 /* return desc to free-list */ 1104 /* return desc to free-list */
1105 coh901318_desc_remove(cohd);
1098 coh901318_desc_free(cohc, cohd); 1106 coh901318_desc_free(cohc, cohd);
1099 } 1107 }
1100 1108
@@ -1102,16 +1110,14 @@ coh901318_terminate_all(struct dma_chan *chan)
1102 /* release the lli allocation*/ 1110 /* release the lli allocation*/
1103 coh901318_lli_free(&cohc->base->pool, &cohd->data); 1111 coh901318_lli_free(&cohc->base->pool, &cohd->data);
1104 1112
1105 coh901318_desc_remove(cohd);
1106
1107 /* return desc to free-list */ 1113 /* return desc to free-list */
1114 coh901318_desc_remove(cohd);
1108 coh901318_desc_free(cohc, cohd); 1115 coh901318_desc_free(cohc, cohd);
1109 } 1116 }
1110 1117
1111 1118
1112 cohc->nbr_active_done = 0; 1119 cohc->nbr_active_done = 0;
1113 cohc->busy = 0; 1120 cohc->busy = 0;
1114 cohc->pending_irqs = 0;
1115 1121
1116 spin_unlock_irqrestore(&cohc->lock, flags); 1122 spin_unlock_irqrestore(&cohc->lock, flags);
1117} 1123}
@@ -1138,7 +1144,6 @@ void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
1138 1144
1139 spin_lock_init(&cohc->lock); 1145 spin_lock_init(&cohc->lock);
1140 1146
1141 cohc->pending_irqs = 0;
1142 cohc->nbr_active_done = 0; 1147 cohc->nbr_active_done = 0;
1143 cohc->busy = 0; 1148 cohc->busy = 0;
1144 INIT_LIST_HEAD(&cohc->free); 1149 INIT_LIST_HEAD(&cohc->free);
@@ -1254,12 +1259,17 @@ static int __init coh901318_probe(struct platform_device *pdev)
1254 base->dma_memcpy.device_issue_pending = coh901318_issue_pending; 1259 base->dma_memcpy.device_issue_pending = coh901318_issue_pending;
1255 base->dma_memcpy.device_terminate_all = coh901318_terminate_all; 1260 base->dma_memcpy.device_terminate_all = coh901318_terminate_all;
1256 base->dma_memcpy.dev = &pdev->dev; 1261 base->dma_memcpy.dev = &pdev->dev;
1262 /*
1263 * This controller can only access address at even 32bit boundaries,
1264 * i.e. 2^2
1265 */
1266 base->dma_memcpy.copy_align = 2;
1257 err = dma_async_device_register(&base->dma_memcpy); 1267 err = dma_async_device_register(&base->dma_memcpy);
1258 1268
1259 if (err) 1269 if (err)
1260 goto err_register_memcpy; 1270 goto err_register_memcpy;
1261 1271
1262 dev_dbg(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n", 1272 dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
1263 (u32) base->virtbase); 1273 (u32) base->virtbase);
1264 1274
1265 return err; 1275 return err;
diff --git a/drivers/dma/coh901318_lli.c b/drivers/dma/coh901318_lli.c
index f5120f238a4d..71d58c1a1e86 100644
--- a/drivers/dma/coh901318_lli.c
+++ b/drivers/dma/coh901318_lli.c
@@ -74,6 +74,8 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
74 74
75 lli = head; 75 lli = head;
76 lli->phy_this = phy; 76 lli->phy_this = phy;
77 lli->link_addr = 0x00000000;
78 lli->virt_link_addr = 0x00000000U;
77 79
78 for (i = 1; i < len; i++) { 80 for (i = 1; i < len; i++) {
79 lli_prev = lli; 81 lli_prev = lli;
@@ -85,13 +87,13 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
85 87
86 DEBUGFS_POOL_COUNTER_ADD(pool, 1); 88 DEBUGFS_POOL_COUNTER_ADD(pool, 1);
87 lli->phy_this = phy; 89 lli->phy_this = phy;
90 lli->link_addr = 0x00000000;
91 lli->virt_link_addr = 0x00000000U;
88 92
89 lli_prev->link_addr = phy; 93 lli_prev->link_addr = phy;
90 lli_prev->virt_link_addr = lli; 94 lli_prev->virt_link_addr = lli;
91 } 95 }
92 96
93 lli->link_addr = 0x00000000U;
94
95 spin_unlock(&pool->lock); 97 spin_unlock(&pool->lock);
96 98
97 return head; 99 return head;
@@ -166,8 +168,7 @@ coh901318_lli_fill_memcpy(struct coh901318_pool *pool,
166 lli->src_addr = src; 168 lli->src_addr = src;
167 lli->dst_addr = dst; 169 lli->dst_addr = dst;
168 170
169 /* One irq per single transfer */ 171 return 0;
170 return 1;
171} 172}
172 173
173int 174int
@@ -223,8 +224,7 @@ coh901318_lli_fill_single(struct coh901318_pool *pool,
223 lli->src_addr = src; 224 lli->src_addr = src;
224 lli->dst_addr = dst; 225 lli->dst_addr = dst;
225 226
226 /* One irq per single transfer */ 227 return 0;
227 return 1;
228} 228}
229 229
230int 230int
@@ -240,7 +240,6 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
240 u32 ctrl_sg; 240 u32 ctrl_sg;
241 dma_addr_t src = 0; 241 dma_addr_t src = 0;
242 dma_addr_t dst = 0; 242 dma_addr_t dst = 0;
243 int nbr_of_irq = 0;
244 u32 bytes_to_transfer; 243 u32 bytes_to_transfer;
245 u32 elem_size; 244 u32 elem_size;
246 245
@@ -269,15 +268,12 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
269 ctrl_sg = ctrl ? ctrl : ctrl_last; 268 ctrl_sg = ctrl ? ctrl : ctrl_last;
270 269
271 270
272 if ((ctrl_sg & ctrl_irq_mask))
273 nbr_of_irq++;
274
275 if (dir == DMA_TO_DEVICE) 271 if (dir == DMA_TO_DEVICE)
276 /* increment source address */ 272 /* increment source address */
277 src = sg_dma_address(sg); 273 src = sg_phys(sg);
278 else 274 else
279 /* increment destination address */ 275 /* increment destination address */
280 dst = sg_dma_address(sg); 276 dst = sg_phys(sg);
281 277
282 bytes_to_transfer = sg_dma_len(sg); 278 bytes_to_transfer = sg_dma_len(sg);
283 279
@@ -310,8 +306,7 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
310 } 306 }
311 spin_unlock(&pool->lock); 307 spin_unlock(&pool->lock);
312 308
313 /* There can be many IRQs per sg transfer */ 309 return 0;
314 return nbr_of_irq;
315 err: 310 err:
316 spin_unlock(&pool->lock); 311 spin_unlock(&pool->lock);
317 return -EINVAL; 312 return -EINVAL;
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 948d563941c9..6fa55fe3dd24 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -237,7 +237,7 @@ static int dmatest_func(void *data)
237 dma_cookie_t cookie; 237 dma_cookie_t cookie;
238 enum dma_status status; 238 enum dma_status status;
239 enum dma_ctrl_flags flags; 239 enum dma_ctrl_flags flags;
240 u8 pq_coefs[pq_sources]; 240 u8 pq_coefs[pq_sources + 1];
241 int ret; 241 int ret;
242 int src_cnt; 242 int src_cnt;
243 int dst_cnt; 243 int dst_cnt;
@@ -257,7 +257,7 @@ static int dmatest_func(void *data)
257 } else if (thread->type == DMA_PQ) { 257 } else if (thread->type == DMA_PQ) {
258 src_cnt = pq_sources | 1; /* force odd to ensure dst = src */ 258 src_cnt = pq_sources | 1; /* force odd to ensure dst = src */
259 dst_cnt = 2; 259 dst_cnt = 2;
260 for (i = 0; i < pq_sources; i++) 260 for (i = 0; i < src_cnt; i++)
261 pq_coefs[i] = 1; 261 pq_coefs[i] = 1;
262 } else 262 } else
263 goto err_srcs; 263 goto err_srcs;
@@ -347,7 +347,7 @@ static int dmatest_func(void *data)
347 else if (thread->type == DMA_XOR) 347 else if (thread->type == DMA_XOR)
348 tx = dev->device_prep_dma_xor(chan, 348 tx = dev->device_prep_dma_xor(chan,
349 dma_dsts[0] + dst_off, 349 dma_dsts[0] + dst_off,
350 dma_srcs, xor_sources, 350 dma_srcs, src_cnt,
351 len, flags); 351 len, flags);
352 else if (thread->type == DMA_PQ) { 352 else if (thread->type == DMA_PQ) {
353 dma_addr_t dma_pq[dst_cnt]; 353 dma_addr_t dma_pq[dst_cnt];
@@ -355,7 +355,7 @@ static int dmatest_func(void *data)
355 for (i = 0; i < dst_cnt; i++) 355 for (i = 0; i < dst_cnt; i++)
356 dma_pq[i] = dma_dsts[i] + dst_off; 356 dma_pq[i] = dma_dsts[i] + dst_off;
357 tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs, 357 tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs,
358 pq_sources, pq_coefs, 358 src_cnt, pq_coefs,
359 len, flags); 359 len, flags);
360 } 360 }
361 361
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 296f9e747fac..bbb4be5a3ff4 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -37,19 +37,19 @@
37#include <asm/fsldma.h> 37#include <asm/fsldma.h>
38#include "fsldma.h" 38#include "fsldma.h"
39 39
40static void dma_init(struct fsl_dma_chan *fsl_chan) 40static void dma_init(struct fsldma_chan *chan)
41{ 41{
42 /* Reset the channel */ 42 /* Reset the channel */
43 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 0, 32); 43 DMA_OUT(chan, &chan->regs->mr, 0, 32);
44 44
45 switch (fsl_chan->feature & FSL_DMA_IP_MASK) { 45 switch (chan->feature & FSL_DMA_IP_MASK) {
46 case FSL_DMA_IP_85XX: 46 case FSL_DMA_IP_85XX:
47 /* Set the channel to below modes: 47 /* Set the channel to below modes:
48 * EIE - Error interrupt enable 48 * EIE - Error interrupt enable
49 * EOSIE - End of segments interrupt enable (basic mode) 49 * EOSIE - End of segments interrupt enable (basic mode)
50 * EOLNIE - End of links interrupt enable 50 * EOLNIE - End of links interrupt enable
51 */ 51 */
52 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EIE 52 DMA_OUT(chan, &chan->regs->mr, FSL_DMA_MR_EIE
53 | FSL_DMA_MR_EOLNIE | FSL_DMA_MR_EOSIE, 32); 53 | FSL_DMA_MR_EOLNIE | FSL_DMA_MR_EOSIE, 32);
54 break; 54 break;
55 case FSL_DMA_IP_83XX: 55 case FSL_DMA_IP_83XX:
@@ -57,170 +57,146 @@ static void dma_init(struct fsl_dma_chan *fsl_chan)
57 * EOTIE - End-of-transfer interrupt enable 57 * EOTIE - End-of-transfer interrupt enable
58 * PRC_RM - PCI read multiple 58 * PRC_RM - PCI read multiple
59 */ 59 */
60 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EOTIE 60 DMA_OUT(chan, &chan->regs->mr, FSL_DMA_MR_EOTIE
61 | FSL_DMA_MR_PRC_RM, 32); 61 | FSL_DMA_MR_PRC_RM, 32);
62 break; 62 break;
63 } 63 }
64
65} 64}
66 65
67static void set_sr(struct fsl_dma_chan *fsl_chan, u32 val) 66static void set_sr(struct fsldma_chan *chan, u32 val)
68{ 67{
69 DMA_OUT(fsl_chan, &fsl_chan->reg_base->sr, val, 32); 68 DMA_OUT(chan, &chan->regs->sr, val, 32);
70} 69}
71 70
72static u32 get_sr(struct fsl_dma_chan *fsl_chan) 71static u32 get_sr(struct fsldma_chan *chan)
73{ 72{
74 return DMA_IN(fsl_chan, &fsl_chan->reg_base->sr, 32); 73 return DMA_IN(chan, &chan->regs->sr, 32);
75} 74}
76 75
77static void set_desc_cnt(struct fsl_dma_chan *fsl_chan, 76static void set_desc_cnt(struct fsldma_chan *chan,
78 struct fsl_dma_ld_hw *hw, u32 count) 77 struct fsl_dma_ld_hw *hw, u32 count)
79{ 78{
80 hw->count = CPU_TO_DMA(fsl_chan, count, 32); 79 hw->count = CPU_TO_DMA(chan, count, 32);
81} 80}
82 81
83static void set_desc_src(struct fsl_dma_chan *fsl_chan, 82static void set_desc_src(struct fsldma_chan *chan,
84 struct fsl_dma_ld_hw *hw, dma_addr_t src) 83 struct fsl_dma_ld_hw *hw, dma_addr_t src)
85{ 84{
86 u64 snoop_bits; 85 u64 snoop_bits;
87 86
88 snoop_bits = ((fsl_chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX) 87 snoop_bits = ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX)
89 ? ((u64)FSL_DMA_SATR_SREADTYPE_SNOOP_READ << 32) : 0; 88 ? ((u64)FSL_DMA_SATR_SREADTYPE_SNOOP_READ << 32) : 0;
90 hw->src_addr = CPU_TO_DMA(fsl_chan, snoop_bits | src, 64); 89 hw->src_addr = CPU_TO_DMA(chan, snoop_bits | src, 64);
91} 90}
92 91
93static void set_desc_dest(struct fsl_dma_chan *fsl_chan, 92static void set_desc_dst(struct fsldma_chan *chan,
94 struct fsl_dma_ld_hw *hw, dma_addr_t dest) 93 struct fsl_dma_ld_hw *hw, dma_addr_t dst)
95{ 94{
96 u64 snoop_bits; 95 u64 snoop_bits;
97 96
98 snoop_bits = ((fsl_chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX) 97 snoop_bits = ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX)
99 ? ((u64)FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE << 32) : 0; 98 ? ((u64)FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE << 32) : 0;
100 hw->dst_addr = CPU_TO_DMA(fsl_chan, snoop_bits | dest, 64); 99 hw->dst_addr = CPU_TO_DMA(chan, snoop_bits | dst, 64);
101} 100}
102 101
103static void set_desc_next(struct fsl_dma_chan *fsl_chan, 102static void set_desc_next(struct fsldma_chan *chan,
104 struct fsl_dma_ld_hw *hw, dma_addr_t next) 103 struct fsl_dma_ld_hw *hw, dma_addr_t next)
105{ 104{
106 u64 snoop_bits; 105 u64 snoop_bits;
107 106
108 snoop_bits = ((fsl_chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_83XX) 107 snoop_bits = ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_83XX)
109 ? FSL_DMA_SNEN : 0; 108 ? FSL_DMA_SNEN : 0;
110 hw->next_ln_addr = CPU_TO_DMA(fsl_chan, snoop_bits | next, 64); 109 hw->next_ln_addr = CPU_TO_DMA(chan, snoop_bits | next, 64);
111}
112
113static void set_cdar(struct fsl_dma_chan *fsl_chan, dma_addr_t addr)
114{
115 DMA_OUT(fsl_chan, &fsl_chan->reg_base->cdar, addr | FSL_DMA_SNEN, 64);
116} 110}
117 111
118static dma_addr_t get_cdar(struct fsl_dma_chan *fsl_chan) 112static void set_cdar(struct fsldma_chan *chan, dma_addr_t addr)
119{ 113{
120 return DMA_IN(fsl_chan, &fsl_chan->reg_base->cdar, 64) & ~FSL_DMA_SNEN; 114 DMA_OUT(chan, &chan->regs->cdar, addr | FSL_DMA_SNEN, 64);
121} 115}
122 116
123static void set_ndar(struct fsl_dma_chan *fsl_chan, dma_addr_t addr) 117static dma_addr_t get_cdar(struct fsldma_chan *chan)
124{ 118{
125 DMA_OUT(fsl_chan, &fsl_chan->reg_base->ndar, addr, 64); 119 return DMA_IN(chan, &chan->regs->cdar, 64) & ~FSL_DMA_SNEN;
126} 120}
127 121
128static dma_addr_t get_ndar(struct fsl_dma_chan *fsl_chan) 122static dma_addr_t get_ndar(struct fsldma_chan *chan)
129{ 123{
130 return DMA_IN(fsl_chan, &fsl_chan->reg_base->ndar, 64); 124 return DMA_IN(chan, &chan->regs->ndar, 64);
131} 125}
132 126
133static u32 get_bcr(struct fsl_dma_chan *fsl_chan) 127static u32 get_bcr(struct fsldma_chan *chan)
134{ 128{
135 return DMA_IN(fsl_chan, &fsl_chan->reg_base->bcr, 32); 129 return DMA_IN(chan, &chan->regs->bcr, 32);
136} 130}
137 131
138static int dma_is_idle(struct fsl_dma_chan *fsl_chan) 132static int dma_is_idle(struct fsldma_chan *chan)
139{ 133{
140 u32 sr = get_sr(fsl_chan); 134 u32 sr = get_sr(chan);
141 return (!(sr & FSL_DMA_SR_CB)) || (sr & FSL_DMA_SR_CH); 135 return (!(sr & FSL_DMA_SR_CB)) || (sr & FSL_DMA_SR_CH);
142} 136}
143 137
144static void dma_start(struct fsl_dma_chan *fsl_chan) 138static void dma_start(struct fsldma_chan *chan)
145{ 139{
146 u32 mr_set = 0; 140 u32 mode;
147 141
148 if (fsl_chan->feature & FSL_DMA_CHAN_PAUSE_EXT) { 142 mode = DMA_IN(chan, &chan->regs->mr, 32);
149 DMA_OUT(fsl_chan, &fsl_chan->reg_base->bcr, 0, 32); 143
150 mr_set |= FSL_DMA_MR_EMP_EN; 144 if ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX) {
151 } else if ((fsl_chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX) { 145 if (chan->feature & FSL_DMA_CHAN_PAUSE_EXT) {
152 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 146 DMA_OUT(chan, &chan->regs->bcr, 0, 32);
153 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) 147 mode |= FSL_DMA_MR_EMP_EN;
154 & ~FSL_DMA_MR_EMP_EN, 32); 148 } else {
149 mode &= ~FSL_DMA_MR_EMP_EN;
150 }
155 } 151 }
156 152
157 if (fsl_chan->feature & FSL_DMA_CHAN_START_EXT) 153 if (chan->feature & FSL_DMA_CHAN_START_EXT)
158 mr_set |= FSL_DMA_MR_EMS_EN; 154 mode |= FSL_DMA_MR_EMS_EN;
159 else 155 else
160 mr_set |= FSL_DMA_MR_CS; 156 mode |= FSL_DMA_MR_CS;
161 157
162 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 158 DMA_OUT(chan, &chan->regs->mr, mode, 32);
163 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32)
164 | mr_set, 32);
165} 159}
166 160
167static void dma_halt(struct fsl_dma_chan *fsl_chan) 161static void dma_halt(struct fsldma_chan *chan)
168{ 162{
163 u32 mode;
169 int i; 164 int i;
170 165
171 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 166 mode = DMA_IN(chan, &chan->regs->mr, 32);
172 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) | FSL_DMA_MR_CA, 167 mode |= FSL_DMA_MR_CA;
173 32); 168 DMA_OUT(chan, &chan->regs->mr, mode, 32);
174 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 169
175 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) & ~(FSL_DMA_MR_CS 170 mode &= ~(FSL_DMA_MR_CS | FSL_DMA_MR_EMS_EN | FSL_DMA_MR_CA);
176 | FSL_DMA_MR_EMS_EN | FSL_DMA_MR_CA), 32); 171 DMA_OUT(chan, &chan->regs->mr, mode, 32);
177 172
178 for (i = 0; i < 100; i++) { 173 for (i = 0; i < 100; i++) {
179 if (dma_is_idle(fsl_chan)) 174 if (dma_is_idle(chan))
180 break; 175 return;
176
181 udelay(10); 177 udelay(10);
182 } 178 }
183 if (i >= 100 && !dma_is_idle(fsl_chan)) 179
184 dev_err(fsl_chan->dev, "DMA halt timeout!\n"); 180 if (!dma_is_idle(chan))
181 dev_err(chan->dev, "DMA halt timeout!\n");
185} 182}
186 183
187static void set_ld_eol(struct fsl_dma_chan *fsl_chan, 184static void set_ld_eol(struct fsldma_chan *chan,
188 struct fsl_desc_sw *desc) 185 struct fsl_desc_sw *desc)
189{ 186{
190 u64 snoop_bits; 187 u64 snoop_bits;
191 188
192 snoop_bits = ((fsl_chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_83XX) 189 snoop_bits = ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_83XX)
193 ? FSL_DMA_SNEN : 0; 190 ? FSL_DMA_SNEN : 0;
194 191
195 desc->hw.next_ln_addr = CPU_TO_DMA(fsl_chan, 192 desc->hw.next_ln_addr = CPU_TO_DMA(chan,
196 DMA_TO_CPU(fsl_chan, desc->hw.next_ln_addr, 64) | FSL_DMA_EOL 193 DMA_TO_CPU(chan, desc->hw.next_ln_addr, 64) | FSL_DMA_EOL
197 | snoop_bits, 64); 194 | snoop_bits, 64);
198} 195}
199 196
200static void append_ld_queue(struct fsl_dma_chan *fsl_chan,
201 struct fsl_desc_sw *new_desc)
202{
203 struct fsl_desc_sw *queue_tail = to_fsl_desc(fsl_chan->ld_queue.prev);
204
205 if (list_empty(&fsl_chan->ld_queue))
206 return;
207
208 /* Link to the new descriptor physical address and
209 * Enable End-of-segment interrupt for
210 * the last link descriptor.
211 * (the previous node's next link descriptor)
212 *
213 * For FSL_DMA_IP_83xx, the snoop enable bit need be set.
214 */
215 queue_tail->hw.next_ln_addr = CPU_TO_DMA(fsl_chan,
216 new_desc->async_tx.phys | FSL_DMA_EOSIE |
217 (((fsl_chan->feature & FSL_DMA_IP_MASK)
218 == FSL_DMA_IP_83XX) ? FSL_DMA_SNEN : 0), 64);
219}
220
221/** 197/**
222 * fsl_chan_set_src_loop_size - Set source address hold transfer size 198 * fsl_chan_set_src_loop_size - Set source address hold transfer size
223 * @fsl_chan : Freescale DMA channel 199 * @chan : Freescale DMA channel
224 * @size : Address loop size, 0 for disable loop 200 * @size : Address loop size, 0 for disable loop
225 * 201 *
226 * The set source address hold transfer size. The source 202 * The set source address hold transfer size. The source
@@ -229,29 +205,30 @@ static void append_ld_queue(struct fsl_dma_chan *fsl_chan,
229 * read data from SA, SA + 1, SA + 2, SA + 3, then loop back to SA, 205 * read data from SA, SA + 1, SA + 2, SA + 3, then loop back to SA,
230 * SA + 1 ... and so on. 206 * SA + 1 ... and so on.
231 */ 207 */
232static void fsl_chan_set_src_loop_size(struct fsl_dma_chan *fsl_chan, int size) 208static void fsl_chan_set_src_loop_size(struct fsldma_chan *chan, int size)
233{ 209{
210 u32 mode;
211
212 mode = DMA_IN(chan, &chan->regs->mr, 32);
213
234 switch (size) { 214 switch (size) {
235 case 0: 215 case 0:
236 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 216 mode &= ~FSL_DMA_MR_SAHE;
237 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) &
238 (~FSL_DMA_MR_SAHE), 32);
239 break; 217 break;
240 case 1: 218 case 1:
241 case 2: 219 case 2:
242 case 4: 220 case 4:
243 case 8: 221 case 8:
244 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 222 mode |= FSL_DMA_MR_SAHE | (__ilog2(size) << 14);
245 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) |
246 FSL_DMA_MR_SAHE | (__ilog2(size) << 14),
247 32);
248 break; 223 break;
249 } 224 }
225
226 DMA_OUT(chan, &chan->regs->mr, mode, 32);
250} 227}
251 228
252/** 229/**
253 * fsl_chan_set_dest_loop_size - Set destination address hold transfer size 230 * fsl_chan_set_dst_loop_size - Set destination address hold transfer size
254 * @fsl_chan : Freescale DMA channel 231 * @chan : Freescale DMA channel
255 * @size : Address loop size, 0 for disable loop 232 * @size : Address loop size, 0 for disable loop
256 * 233 *
257 * The set destination address hold transfer size. The destination 234 * The set destination address hold transfer size. The destination
@@ -260,29 +237,30 @@ static void fsl_chan_set_src_loop_size(struct fsl_dma_chan *fsl_chan, int size)
260 * write data to TA, TA + 1, TA + 2, TA + 3, then loop back to TA, 237 * write data to TA, TA + 1, TA + 2, TA + 3, then loop back to TA,
261 * TA + 1 ... and so on. 238 * TA + 1 ... and so on.
262 */ 239 */
263static void fsl_chan_set_dest_loop_size(struct fsl_dma_chan *fsl_chan, int size) 240static void fsl_chan_set_dst_loop_size(struct fsldma_chan *chan, int size)
264{ 241{
242 u32 mode;
243
244 mode = DMA_IN(chan, &chan->regs->mr, 32);
245
265 switch (size) { 246 switch (size) {
266 case 0: 247 case 0:
267 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 248 mode &= ~FSL_DMA_MR_DAHE;
268 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) &
269 (~FSL_DMA_MR_DAHE), 32);
270 break; 249 break;
271 case 1: 250 case 1:
272 case 2: 251 case 2:
273 case 4: 252 case 4:
274 case 8: 253 case 8:
275 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 254 mode |= FSL_DMA_MR_DAHE | (__ilog2(size) << 16);
276 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) |
277 FSL_DMA_MR_DAHE | (__ilog2(size) << 16),
278 32);
279 break; 255 break;
280 } 256 }
257
258 DMA_OUT(chan, &chan->regs->mr, mode, 32);
281} 259}
282 260
283/** 261/**
284 * fsl_chan_set_request_count - Set DMA Request Count for external control 262 * fsl_chan_set_request_count - Set DMA Request Count for external control
285 * @fsl_chan : Freescale DMA channel 263 * @chan : Freescale DMA channel
286 * @size : Number of bytes to transfer in a single request 264 * @size : Number of bytes to transfer in a single request
287 * 265 *
288 * The Freescale DMA channel can be controlled by the external signal DREQ#. 266 * The Freescale DMA channel can be controlled by the external signal DREQ#.
@@ -292,35 +270,38 @@ static void fsl_chan_set_dest_loop_size(struct fsl_dma_chan *fsl_chan, int size)
292 * 270 *
293 * A size of 0 disables external pause control. The maximum size is 1024. 271 * A size of 0 disables external pause control. The maximum size is 1024.
294 */ 272 */
295static void fsl_chan_set_request_count(struct fsl_dma_chan *fsl_chan, int size) 273static void fsl_chan_set_request_count(struct fsldma_chan *chan, int size)
296{ 274{
275 u32 mode;
276
297 BUG_ON(size > 1024); 277 BUG_ON(size > 1024);
298 DMA_OUT(fsl_chan, &fsl_chan->reg_base->mr, 278
299 DMA_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) 279 mode = DMA_IN(chan, &chan->regs->mr, 32);
300 | ((__ilog2(size) << 24) & 0x0f000000), 280 mode |= (__ilog2(size) << 24) & 0x0f000000;
301 32); 281
282 DMA_OUT(chan, &chan->regs->mr, mode, 32);
302} 283}
303 284
304/** 285/**
305 * fsl_chan_toggle_ext_pause - Toggle channel external pause status 286 * fsl_chan_toggle_ext_pause - Toggle channel external pause status
306 * @fsl_chan : Freescale DMA channel 287 * @chan : Freescale DMA channel
307 * @enable : 0 is disabled, 1 is enabled. 288 * @enable : 0 is disabled, 1 is enabled.
308 * 289 *
309 * The Freescale DMA channel can be controlled by the external signal DREQ#. 290 * The Freescale DMA channel can be controlled by the external signal DREQ#.
310 * The DMA Request Count feature should be used in addition to this feature 291 * The DMA Request Count feature should be used in addition to this feature
311 * to set the number of bytes to transfer before pausing the channel. 292 * to set the number of bytes to transfer before pausing the channel.
312 */ 293 */
313static void fsl_chan_toggle_ext_pause(struct fsl_dma_chan *fsl_chan, int enable) 294static void fsl_chan_toggle_ext_pause(struct fsldma_chan *chan, int enable)
314{ 295{
315 if (enable) 296 if (enable)
316 fsl_chan->feature |= FSL_DMA_CHAN_PAUSE_EXT; 297 chan->feature |= FSL_DMA_CHAN_PAUSE_EXT;
317 else 298 else
318 fsl_chan->feature &= ~FSL_DMA_CHAN_PAUSE_EXT; 299 chan->feature &= ~FSL_DMA_CHAN_PAUSE_EXT;
319} 300}
320 301
321/** 302/**
322 * fsl_chan_toggle_ext_start - Toggle channel external start status 303 * fsl_chan_toggle_ext_start - Toggle channel external start status
323 * @fsl_chan : Freescale DMA channel 304 * @chan : Freescale DMA channel
324 * @enable : 0 is disabled, 1 is enabled. 305 * @enable : 0 is disabled, 1 is enabled.
325 * 306 *
326 * If enable the external start, the channel can be started by an 307 * If enable the external start, the channel can be started by an
@@ -328,141 +309,196 @@ static void fsl_chan_toggle_ext_pause(struct fsl_dma_chan *fsl_chan, int enable)
328 * transfer immediately. The DMA channel will wait for the 309 * transfer immediately. The DMA channel will wait for the
329 * control pin asserted. 310 * control pin asserted.
330 */ 311 */
331static void fsl_chan_toggle_ext_start(struct fsl_dma_chan *fsl_chan, int enable) 312static void fsl_chan_toggle_ext_start(struct fsldma_chan *chan, int enable)
332{ 313{
333 if (enable) 314 if (enable)
334 fsl_chan->feature |= FSL_DMA_CHAN_START_EXT; 315 chan->feature |= FSL_DMA_CHAN_START_EXT;
335 else 316 else
336 fsl_chan->feature &= ~FSL_DMA_CHAN_START_EXT; 317 chan->feature &= ~FSL_DMA_CHAN_START_EXT;
318}
319
320static void append_ld_queue(struct fsldma_chan *chan,
321 struct fsl_desc_sw *desc)
322{
323 struct fsl_desc_sw *tail = to_fsl_desc(chan->ld_pending.prev);
324
325 if (list_empty(&chan->ld_pending))
326 goto out_splice;
327
328 /*
329 * Add the hardware descriptor to the chain of hardware descriptors
330 * that already exists in memory.
331 *
332 * This will un-set the EOL bit of the existing transaction, and the
333 * last link in this transaction will become the EOL descriptor.
334 */
335 set_desc_next(chan, &tail->hw, desc->async_tx.phys);
336
337 /*
338 * Add the software descriptor and all children to the list
339 * of pending transactions
340 */
341out_splice:
342 list_splice_tail_init(&desc->tx_list, &chan->ld_pending);
337} 343}
338 344
339static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx) 345static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
340{ 346{
341 struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan); 347 struct fsldma_chan *chan = to_fsl_chan(tx->chan);
342 struct fsl_desc_sw *desc = tx_to_fsl_desc(tx); 348 struct fsl_desc_sw *desc = tx_to_fsl_desc(tx);
343 struct fsl_desc_sw *child; 349 struct fsl_desc_sw *child;
344 unsigned long flags; 350 unsigned long flags;
345 dma_cookie_t cookie; 351 dma_cookie_t cookie;
346 352
347 /* cookie increment and adding to ld_queue must be atomic */ 353 spin_lock_irqsave(&chan->desc_lock, flags);
348 spin_lock_irqsave(&fsl_chan->desc_lock, flags);
349 354
350 cookie = fsl_chan->common.cookie; 355 /*
356 * assign cookies to all of the software descriptors
357 * that make up this transaction
358 */
359 cookie = chan->common.cookie;
351 list_for_each_entry(child, &desc->tx_list, node) { 360 list_for_each_entry(child, &desc->tx_list, node) {
352 cookie++; 361 cookie++;
353 if (cookie < 0) 362 if (cookie < 0)
354 cookie = 1; 363 cookie = 1;
355 364
356 desc->async_tx.cookie = cookie; 365 child->async_tx.cookie = cookie;
357 } 366 }
358 367
359 fsl_chan->common.cookie = cookie; 368 chan->common.cookie = cookie;
360 append_ld_queue(fsl_chan, desc); 369
361 list_splice_init(&desc->tx_list, fsl_chan->ld_queue.prev); 370 /* put this transaction onto the tail of the pending queue */
371 append_ld_queue(chan, desc);
362 372
363 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 373 spin_unlock_irqrestore(&chan->desc_lock, flags);
364 374
365 return cookie; 375 return cookie;
366} 376}
367 377
368/** 378/**
369 * fsl_dma_alloc_descriptor - Allocate descriptor from channel's DMA pool. 379 * fsl_dma_alloc_descriptor - Allocate descriptor from channel's DMA pool.
370 * @fsl_chan : Freescale DMA channel 380 * @chan : Freescale DMA channel
371 * 381 *
372 * Return - The descriptor allocated. NULL for failed. 382 * Return - The descriptor allocated. NULL for failed.
373 */ 383 */
374static struct fsl_desc_sw *fsl_dma_alloc_descriptor( 384static struct fsl_desc_sw *fsl_dma_alloc_descriptor(
375 struct fsl_dma_chan *fsl_chan) 385 struct fsldma_chan *chan)
376{ 386{
387 struct fsl_desc_sw *desc;
377 dma_addr_t pdesc; 388 dma_addr_t pdesc;
378 struct fsl_desc_sw *desc_sw; 389
379 390 desc = dma_pool_alloc(chan->desc_pool, GFP_ATOMIC, &pdesc);
380 desc_sw = dma_pool_alloc(fsl_chan->desc_pool, GFP_ATOMIC, &pdesc); 391 if (!desc) {
381 if (desc_sw) { 392 dev_dbg(chan->dev, "out of memory for link desc\n");
382 memset(desc_sw, 0, sizeof(struct fsl_desc_sw)); 393 return NULL;
383 INIT_LIST_HEAD(&desc_sw->tx_list);
384 dma_async_tx_descriptor_init(&desc_sw->async_tx,
385 &fsl_chan->common);
386 desc_sw->async_tx.tx_submit = fsl_dma_tx_submit;
387 desc_sw->async_tx.phys = pdesc;
388 } 394 }
389 395
390 return desc_sw; 396 memset(desc, 0, sizeof(*desc));
397 INIT_LIST_HEAD(&desc->tx_list);
398 dma_async_tx_descriptor_init(&desc->async_tx, &chan->common);
399 desc->async_tx.tx_submit = fsl_dma_tx_submit;
400 desc->async_tx.phys = pdesc;
401
402 return desc;
391} 403}
392 404
393 405
394/** 406/**
395 * fsl_dma_alloc_chan_resources - Allocate resources for DMA channel. 407 * fsl_dma_alloc_chan_resources - Allocate resources for DMA channel.
396 * @fsl_chan : Freescale DMA channel 408 * @chan : Freescale DMA channel
397 * 409 *
398 * This function will create a dma pool for descriptor allocation. 410 * This function will create a dma pool for descriptor allocation.
399 * 411 *
400 * Return - The number of descriptors allocated. 412 * Return - The number of descriptors allocated.
401 */ 413 */
402static int fsl_dma_alloc_chan_resources(struct dma_chan *chan) 414static int fsl_dma_alloc_chan_resources(struct dma_chan *dchan)
403{ 415{
404 struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan); 416 struct fsldma_chan *chan = to_fsl_chan(dchan);
405 417
406 /* Has this channel already been allocated? */ 418 /* Has this channel already been allocated? */
407 if (fsl_chan->desc_pool) 419 if (chan->desc_pool)
408 return 1; 420 return 1;
409 421
410 /* We need the descriptor to be aligned to 32bytes 422 /*
423 * We need the descriptor to be aligned to 32bytes
411 * for meeting FSL DMA specification requirement. 424 * for meeting FSL DMA specification requirement.
412 */ 425 */
413 fsl_chan->desc_pool = dma_pool_create("fsl_dma_engine_desc_pool", 426 chan->desc_pool = dma_pool_create("fsl_dma_engine_desc_pool",
414 fsl_chan->dev, sizeof(struct fsl_desc_sw), 427 chan->dev,
415 32, 0); 428 sizeof(struct fsl_desc_sw),
416 if (!fsl_chan->desc_pool) { 429 __alignof__(struct fsl_desc_sw), 0);
417 dev_err(fsl_chan->dev, "No memory for channel %d " 430 if (!chan->desc_pool) {
418 "descriptor dma pool.\n", fsl_chan->id); 431 dev_err(chan->dev, "unable to allocate channel %d "
419 return 0; 432 "descriptor pool\n", chan->id);
433 return -ENOMEM;
420 } 434 }
421 435
436 /* there is at least one descriptor free to be allocated */
422 return 1; 437 return 1;
423} 438}
424 439
425/** 440/**
426 * fsl_dma_free_chan_resources - Free all resources of the channel. 441 * fsldma_free_desc_list - Free all descriptors in a queue
427 * @fsl_chan : Freescale DMA channel 442 * @chan: Freescae DMA channel
443 * @list: the list to free
444 *
445 * LOCKING: must hold chan->desc_lock
428 */ 446 */
429static void fsl_dma_free_chan_resources(struct dma_chan *chan) 447static void fsldma_free_desc_list(struct fsldma_chan *chan,
448 struct list_head *list)
430{ 449{
431 struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
432 struct fsl_desc_sw *desc, *_desc; 450 struct fsl_desc_sw *desc, *_desc;
433 unsigned long flags;
434 451
435 dev_dbg(fsl_chan->dev, "Free all channel resources.\n"); 452 list_for_each_entry_safe(desc, _desc, list, node) {
436 spin_lock_irqsave(&fsl_chan->desc_lock, flags); 453 list_del(&desc->node);
437 list_for_each_entry_safe(desc, _desc, &fsl_chan->ld_queue, node) { 454 dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
438#ifdef FSL_DMA_LD_DEBUG 455 }
439 dev_dbg(fsl_chan->dev, 456}
440 "LD %p will be released.\n", desc); 457
441#endif 458static void fsldma_free_desc_list_reverse(struct fsldma_chan *chan,
459 struct list_head *list)
460{
461 struct fsl_desc_sw *desc, *_desc;
462
463 list_for_each_entry_safe_reverse(desc, _desc, list, node) {
442 list_del(&desc->node); 464 list_del(&desc->node);
443 /* free link descriptor */ 465 dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
444 dma_pool_free(fsl_chan->desc_pool, desc, desc->async_tx.phys);
445 } 466 }
446 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 467}
447 dma_pool_destroy(fsl_chan->desc_pool); 468
469/**
470 * fsl_dma_free_chan_resources - Free all resources of the channel.
471 * @chan : Freescale DMA channel
472 */
473static void fsl_dma_free_chan_resources(struct dma_chan *dchan)
474{
475 struct fsldma_chan *chan = to_fsl_chan(dchan);
476 unsigned long flags;
477
478 dev_dbg(chan->dev, "Free all channel resources.\n");
479 spin_lock_irqsave(&chan->desc_lock, flags);
480 fsldma_free_desc_list(chan, &chan->ld_pending);
481 fsldma_free_desc_list(chan, &chan->ld_running);
482 spin_unlock_irqrestore(&chan->desc_lock, flags);
448 483
449 fsl_chan->desc_pool = NULL; 484 dma_pool_destroy(chan->desc_pool);
485 chan->desc_pool = NULL;
450} 486}
451 487
452static struct dma_async_tx_descriptor * 488static struct dma_async_tx_descriptor *
453fsl_dma_prep_interrupt(struct dma_chan *chan, unsigned long flags) 489fsl_dma_prep_interrupt(struct dma_chan *dchan, unsigned long flags)
454{ 490{
455 struct fsl_dma_chan *fsl_chan; 491 struct fsldma_chan *chan;
456 struct fsl_desc_sw *new; 492 struct fsl_desc_sw *new;
457 493
458 if (!chan) 494 if (!dchan)
459 return NULL; 495 return NULL;
460 496
461 fsl_chan = to_fsl_chan(chan); 497 chan = to_fsl_chan(dchan);
462 498
463 new = fsl_dma_alloc_descriptor(fsl_chan); 499 new = fsl_dma_alloc_descriptor(chan);
464 if (!new) { 500 if (!new) {
465 dev_err(fsl_chan->dev, "No free memory for link descriptor\n"); 501 dev_err(chan->dev, "No free memory for link descriptor\n");
466 return NULL; 502 return NULL;
467 } 503 }
468 504
@@ -473,51 +509,50 @@ fsl_dma_prep_interrupt(struct dma_chan *chan, unsigned long flags)
473 list_add_tail(&new->node, &new->tx_list); 509 list_add_tail(&new->node, &new->tx_list);
474 510
475 /* Set End-of-link to the last link descriptor of new list*/ 511 /* Set End-of-link to the last link descriptor of new list*/
476 set_ld_eol(fsl_chan, new); 512 set_ld_eol(chan, new);
477 513
478 return &new->async_tx; 514 return &new->async_tx;
479} 515}
480 516
481static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( 517static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
482 struct dma_chan *chan, dma_addr_t dma_dest, dma_addr_t dma_src, 518 struct dma_chan *dchan, dma_addr_t dma_dst, dma_addr_t dma_src,
483 size_t len, unsigned long flags) 519 size_t len, unsigned long flags)
484{ 520{
485 struct fsl_dma_chan *fsl_chan; 521 struct fsldma_chan *chan;
486 struct fsl_desc_sw *first = NULL, *prev = NULL, *new; 522 struct fsl_desc_sw *first = NULL, *prev = NULL, *new;
487 struct list_head *list;
488 size_t copy; 523 size_t copy;
489 524
490 if (!chan) 525 if (!dchan)
491 return NULL; 526 return NULL;
492 527
493 if (!len) 528 if (!len)
494 return NULL; 529 return NULL;
495 530
496 fsl_chan = to_fsl_chan(chan); 531 chan = to_fsl_chan(dchan);
497 532
498 do { 533 do {
499 534
500 /* Allocate the link descriptor from DMA pool */ 535 /* Allocate the link descriptor from DMA pool */
501 new = fsl_dma_alloc_descriptor(fsl_chan); 536 new = fsl_dma_alloc_descriptor(chan);
502 if (!new) { 537 if (!new) {
503 dev_err(fsl_chan->dev, 538 dev_err(chan->dev,
504 "No free memory for link descriptor\n"); 539 "No free memory for link descriptor\n");
505 goto fail; 540 goto fail;
506 } 541 }
507#ifdef FSL_DMA_LD_DEBUG 542#ifdef FSL_DMA_LD_DEBUG
508 dev_dbg(fsl_chan->dev, "new link desc alloc %p\n", new); 543 dev_dbg(chan->dev, "new link desc alloc %p\n", new);
509#endif 544#endif
510 545
511 copy = min(len, (size_t)FSL_DMA_BCR_MAX_CNT); 546 copy = min(len, (size_t)FSL_DMA_BCR_MAX_CNT);
512 547
513 set_desc_cnt(fsl_chan, &new->hw, copy); 548 set_desc_cnt(chan, &new->hw, copy);
514 set_desc_src(fsl_chan, &new->hw, dma_src); 549 set_desc_src(chan, &new->hw, dma_src);
515 set_desc_dest(fsl_chan, &new->hw, dma_dest); 550 set_desc_dst(chan, &new->hw, dma_dst);
516 551
517 if (!first) 552 if (!first)
518 first = new; 553 first = new;
519 else 554 else
520 set_desc_next(fsl_chan, &prev->hw, new->async_tx.phys); 555 set_desc_next(chan, &prev->hw, new->async_tx.phys);
521 556
522 new->async_tx.cookie = 0; 557 new->async_tx.cookie = 0;
523 async_tx_ack(&new->async_tx); 558 async_tx_ack(&new->async_tx);
@@ -525,7 +560,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
525 prev = new; 560 prev = new;
526 len -= copy; 561 len -= copy;
527 dma_src += copy; 562 dma_src += copy;
528 dma_dest += copy; 563 dma_dst += copy;
529 564
530 /* Insert the link descriptor to the LD ring */ 565 /* Insert the link descriptor to the LD ring */
531 list_add_tail(&new->node, &first->tx_list); 566 list_add_tail(&new->node, &first->tx_list);
@@ -535,7 +570,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
535 new->async_tx.cookie = -EBUSY; 570 new->async_tx.cookie = -EBUSY;
536 571
537 /* Set End-of-link to the last link descriptor of new list*/ 572 /* Set End-of-link to the last link descriptor of new list*/
538 set_ld_eol(fsl_chan, new); 573 set_ld_eol(chan, new);
539 574
540 return &first->async_tx; 575 return &first->async_tx;
541 576
@@ -543,12 +578,7 @@ fail:
543 if (!first) 578 if (!first)
544 return NULL; 579 return NULL;
545 580
546 list = &first->tx_list; 581 fsldma_free_desc_list_reverse(chan, &first->tx_list);
547 list_for_each_entry_safe_reverse(new, prev, list, node) {
548 list_del(&new->node);
549 dma_pool_free(fsl_chan->desc_pool, new, new->async_tx.phys);
550 }
551
552 return NULL; 582 return NULL;
553} 583}
554 584
@@ -565,13 +595,12 @@ fail:
565 * chan->private variable. 595 * chan->private variable.
566 */ 596 */
567static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg( 597static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
568 struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len, 598 struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
569 enum dma_data_direction direction, unsigned long flags) 599 enum dma_data_direction direction, unsigned long flags)
570{ 600{
571 struct fsl_dma_chan *fsl_chan; 601 struct fsldma_chan *chan;
572 struct fsl_desc_sw *first = NULL, *prev = NULL, *new = NULL; 602 struct fsl_desc_sw *first = NULL, *prev = NULL, *new = NULL;
573 struct fsl_dma_slave *slave; 603 struct fsl_dma_slave *slave;
574 struct list_head *tx_list;
575 size_t copy; 604 size_t copy;
576 605
577 int i; 606 int i;
@@ -581,14 +610,14 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
581 struct fsl_dma_hw_addr *hw; 610 struct fsl_dma_hw_addr *hw;
582 dma_addr_t dma_dst, dma_src; 611 dma_addr_t dma_dst, dma_src;
583 612
584 if (!chan) 613 if (!dchan)
585 return NULL; 614 return NULL;
586 615
587 if (!chan->private) 616 if (!dchan->private)
588 return NULL; 617 return NULL;
589 618
590 fsl_chan = to_fsl_chan(chan); 619 chan = to_fsl_chan(dchan);
591 slave = chan->private; 620 slave = dchan->private;
592 621
593 if (list_empty(&slave->addresses)) 622 if (list_empty(&slave->addresses))
594 return NULL; 623 return NULL;
@@ -637,14 +666,14 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
637 } 666 }
638 667
639 /* Allocate the link descriptor from DMA pool */ 668 /* Allocate the link descriptor from DMA pool */
640 new = fsl_dma_alloc_descriptor(fsl_chan); 669 new = fsl_dma_alloc_descriptor(chan);
641 if (!new) { 670 if (!new) {
642 dev_err(fsl_chan->dev, "No free memory for " 671 dev_err(chan->dev, "No free memory for "
643 "link descriptor\n"); 672 "link descriptor\n");
644 goto fail; 673 goto fail;
645 } 674 }
646#ifdef FSL_DMA_LD_DEBUG 675#ifdef FSL_DMA_LD_DEBUG
647 dev_dbg(fsl_chan->dev, "new link desc alloc %p\n", new); 676 dev_dbg(chan->dev, "new link desc alloc %p\n", new);
648#endif 677#endif
649 678
650 /* 679 /*
@@ -671,9 +700,9 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
671 } 700 }
672 701
673 /* Fill in the descriptor */ 702 /* Fill in the descriptor */
674 set_desc_cnt(fsl_chan, &new->hw, copy); 703 set_desc_cnt(chan, &new->hw, copy);
675 set_desc_src(fsl_chan, &new->hw, dma_src); 704 set_desc_src(chan, &new->hw, dma_src);
676 set_desc_dest(fsl_chan, &new->hw, dma_dst); 705 set_desc_dst(chan, &new->hw, dma_dst);
677 706
678 /* 707 /*
679 * If this is not the first descriptor, chain the 708 * If this is not the first descriptor, chain the
@@ -682,7 +711,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
682 if (!first) { 711 if (!first) {
683 first = new; 712 first = new;
684 } else { 713 } else {
685 set_desc_next(fsl_chan, &prev->hw, 714 set_desc_next(chan, &prev->hw,
686 new->async_tx.phys); 715 new->async_tx.phys);
687 } 716 }
688 717
@@ -708,23 +737,23 @@ finished:
708 new->async_tx.cookie = -EBUSY; 737 new->async_tx.cookie = -EBUSY;
709 738
710 /* Set End-of-link to the last link descriptor of new list */ 739 /* Set End-of-link to the last link descriptor of new list */
711 set_ld_eol(fsl_chan, new); 740 set_ld_eol(chan, new);
712 741
713 /* Enable extra controller features */ 742 /* Enable extra controller features */
714 if (fsl_chan->set_src_loop_size) 743 if (chan->set_src_loop_size)
715 fsl_chan->set_src_loop_size(fsl_chan, slave->src_loop_size); 744 chan->set_src_loop_size(chan, slave->src_loop_size);
716 745
717 if (fsl_chan->set_dest_loop_size) 746 if (chan->set_dst_loop_size)
718 fsl_chan->set_dest_loop_size(fsl_chan, slave->dst_loop_size); 747 chan->set_dst_loop_size(chan, slave->dst_loop_size);
719 748
720 if (fsl_chan->toggle_ext_start) 749 if (chan->toggle_ext_start)
721 fsl_chan->toggle_ext_start(fsl_chan, slave->external_start); 750 chan->toggle_ext_start(chan, slave->external_start);
722 751
723 if (fsl_chan->toggle_ext_pause) 752 if (chan->toggle_ext_pause)
724 fsl_chan->toggle_ext_pause(fsl_chan, slave->external_pause); 753 chan->toggle_ext_pause(chan, slave->external_pause);
725 754
726 if (fsl_chan->set_request_count) 755 if (chan->set_request_count)
727 fsl_chan->set_request_count(fsl_chan, slave->request_count); 756 chan->set_request_count(chan, slave->request_count);
728 757
729 return &first->async_tx; 758 return &first->async_tx;
730 759
@@ -741,215 +770,216 @@ fail:
741 * 770 *
742 * We're re-using variables for the loop, oh well 771 * We're re-using variables for the loop, oh well
743 */ 772 */
744 tx_list = &first->tx_list; 773 fsldma_free_desc_list_reverse(chan, &first->tx_list);
745 list_for_each_entry_safe_reverse(new, prev, tx_list, node) {
746 list_del_init(&new->node);
747 dma_pool_free(fsl_chan->desc_pool, new, new->async_tx.phys);
748 }
749
750 return NULL; 774 return NULL;
751} 775}
752 776
753static void fsl_dma_device_terminate_all(struct dma_chan *chan) 777static void fsl_dma_device_terminate_all(struct dma_chan *dchan)
754{ 778{
755 struct fsl_dma_chan *fsl_chan; 779 struct fsldma_chan *chan;
756 struct fsl_desc_sw *desc, *tmp;
757 unsigned long flags; 780 unsigned long flags;
758 781
759 if (!chan) 782 if (!dchan)
760 return; 783 return;
761 784
762 fsl_chan = to_fsl_chan(chan); 785 chan = to_fsl_chan(dchan);
763 786
764 /* Halt the DMA engine */ 787 /* Halt the DMA engine */
765 dma_halt(fsl_chan); 788 dma_halt(chan);
766 789
767 spin_lock_irqsave(&fsl_chan->desc_lock, flags); 790 spin_lock_irqsave(&chan->desc_lock, flags);
768 791
769 /* Remove and free all of the descriptors in the LD queue */ 792 /* Remove and free all of the descriptors in the LD queue */
770 list_for_each_entry_safe(desc, tmp, &fsl_chan->ld_queue, node) { 793 fsldma_free_desc_list(chan, &chan->ld_pending);
771 list_del(&desc->node); 794 fsldma_free_desc_list(chan, &chan->ld_running);
772 dma_pool_free(fsl_chan->desc_pool, desc, desc->async_tx.phys);
773 }
774 795
775 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 796 spin_unlock_irqrestore(&chan->desc_lock, flags);
776} 797}
777 798
778/** 799/**
779 * fsl_dma_update_completed_cookie - Update the completed cookie. 800 * fsl_dma_update_completed_cookie - Update the completed cookie.
780 * @fsl_chan : Freescale DMA channel 801 * @chan : Freescale DMA channel
802 *
803 * CONTEXT: hardirq
781 */ 804 */
782static void fsl_dma_update_completed_cookie(struct fsl_dma_chan *fsl_chan) 805static void fsl_dma_update_completed_cookie(struct fsldma_chan *chan)
783{ 806{
784 struct fsl_desc_sw *cur_desc, *desc; 807 struct fsl_desc_sw *desc;
785 dma_addr_t ld_phy; 808 unsigned long flags;
809 dma_cookie_t cookie;
786 810
787 ld_phy = get_cdar(fsl_chan) & FSL_DMA_NLDA_MASK; 811 spin_lock_irqsave(&chan->desc_lock, flags);
788 812
789 if (ld_phy) { 813 if (list_empty(&chan->ld_running)) {
790 cur_desc = NULL; 814 dev_dbg(chan->dev, "no running descriptors\n");
791 list_for_each_entry(desc, &fsl_chan->ld_queue, node) 815 goto out_unlock;
792 if (desc->async_tx.phys == ld_phy) { 816 }
793 cur_desc = desc;
794 break;
795 }
796 817
797 if (cur_desc && cur_desc->async_tx.cookie) { 818 /* Get the last descriptor, update the cookie to that */
798 if (dma_is_idle(fsl_chan)) 819 desc = to_fsl_desc(chan->ld_running.prev);
799 fsl_chan->completed_cookie = 820 if (dma_is_idle(chan))
800 cur_desc->async_tx.cookie; 821 cookie = desc->async_tx.cookie;
801 else 822 else {
802 fsl_chan->completed_cookie = 823 cookie = desc->async_tx.cookie - 1;
803 cur_desc->async_tx.cookie - 1; 824 if (unlikely(cookie < DMA_MIN_COOKIE))
804 } 825 cookie = DMA_MAX_COOKIE;
805 } 826 }
827
828 chan->completed_cookie = cookie;
829
830out_unlock:
831 spin_unlock_irqrestore(&chan->desc_lock, flags);
832}
833
834/**
835 * fsldma_desc_status - Check the status of a descriptor
836 * @chan: Freescale DMA channel
837 * @desc: DMA SW descriptor
838 *
839 * This function will return the status of the given descriptor
840 */
841static enum dma_status fsldma_desc_status(struct fsldma_chan *chan,
842 struct fsl_desc_sw *desc)
843{
844 return dma_async_is_complete(desc->async_tx.cookie,
845 chan->completed_cookie,
846 chan->common.cookie);
806} 847}
807 848
808/** 849/**
809 * fsl_chan_ld_cleanup - Clean up link descriptors 850 * fsl_chan_ld_cleanup - Clean up link descriptors
810 * @fsl_chan : Freescale DMA channel 851 * @chan : Freescale DMA channel
811 * 852 *
812 * This function clean up the ld_queue of DMA channel. 853 * This function clean up the ld_queue of DMA channel.
813 * If 'in_intr' is set, the function will move the link descriptor to
814 * the recycle list. Otherwise, free it directly.
815 */ 854 */
816static void fsl_chan_ld_cleanup(struct fsl_dma_chan *fsl_chan) 855static void fsl_chan_ld_cleanup(struct fsldma_chan *chan)
817{ 856{
818 struct fsl_desc_sw *desc, *_desc; 857 struct fsl_desc_sw *desc, *_desc;
819 unsigned long flags; 858 unsigned long flags;
820 859
821 spin_lock_irqsave(&fsl_chan->desc_lock, flags); 860 spin_lock_irqsave(&chan->desc_lock, flags);
822 861
823 dev_dbg(fsl_chan->dev, "chan completed_cookie = %d\n", 862 dev_dbg(chan->dev, "chan completed_cookie = %d\n", chan->completed_cookie);
824 fsl_chan->completed_cookie); 863 list_for_each_entry_safe(desc, _desc, &chan->ld_running, node) {
825 list_for_each_entry_safe(desc, _desc, &fsl_chan->ld_queue, node) {
826 dma_async_tx_callback callback; 864 dma_async_tx_callback callback;
827 void *callback_param; 865 void *callback_param;
828 866
829 if (dma_async_is_complete(desc->async_tx.cookie, 867 if (fsldma_desc_status(chan, desc) == DMA_IN_PROGRESS)
830 fsl_chan->completed_cookie, fsl_chan->common.cookie)
831 == DMA_IN_PROGRESS)
832 break; 868 break;
833 869
834 callback = desc->async_tx.callback; 870 /* Remove from the list of running transactions */
835 callback_param = desc->async_tx.callback_param;
836
837 /* Remove from ld_queue list */
838 list_del(&desc->node); 871 list_del(&desc->node);
839 872
840 dev_dbg(fsl_chan->dev, "link descriptor %p will be recycle.\n",
841 desc);
842 dma_pool_free(fsl_chan->desc_pool, desc, desc->async_tx.phys);
843
844 /* Run the link descriptor callback function */ 873 /* Run the link descriptor callback function */
874 callback = desc->async_tx.callback;
875 callback_param = desc->async_tx.callback_param;
845 if (callback) { 876 if (callback) {
846 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 877 spin_unlock_irqrestore(&chan->desc_lock, flags);
847 dev_dbg(fsl_chan->dev, "link descriptor %p callback\n", 878 dev_dbg(chan->dev, "LD %p callback\n", desc);
848 desc);
849 callback(callback_param); 879 callback(callback_param);
850 spin_lock_irqsave(&fsl_chan->desc_lock, flags); 880 spin_lock_irqsave(&chan->desc_lock, flags);
851 } 881 }
882
883 /* Run any dependencies, then free the descriptor */
884 dma_run_dependencies(&desc->async_tx);
885 dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
852 } 886 }
853 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 887
888 spin_unlock_irqrestore(&chan->desc_lock, flags);
854} 889}
855 890
856/** 891/**
857 * fsl_chan_xfer_ld_queue - Transfer link descriptors in channel ld_queue. 892 * fsl_chan_xfer_ld_queue - transfer any pending transactions
858 * @fsl_chan : Freescale DMA channel 893 * @chan : Freescale DMA channel
894 *
895 * This will make sure that any pending transactions will be run.
896 * If the DMA controller is idle, it will be started. Otherwise,
897 * the DMA controller's interrupt handler will start any pending
898 * transactions when it becomes idle.
859 */ 899 */
860static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan) 900static void fsl_chan_xfer_ld_queue(struct fsldma_chan *chan)
861{ 901{
862 struct list_head *ld_node; 902 struct fsl_desc_sw *desc;
863 dma_addr_t next_dest_addr;
864 unsigned long flags; 903 unsigned long flags;
865 904
866 spin_lock_irqsave(&fsl_chan->desc_lock, flags); 905 spin_lock_irqsave(&chan->desc_lock, flags);
867 906
868 if (!dma_is_idle(fsl_chan)) 907 /*
908 * If the list of pending descriptors is empty, then we
909 * don't need to do any work at all
910 */
911 if (list_empty(&chan->ld_pending)) {
912 dev_dbg(chan->dev, "no pending LDs\n");
869 goto out_unlock; 913 goto out_unlock;
914 }
870 915
871 dma_halt(fsl_chan); 916 /*
917 * The DMA controller is not idle, which means the interrupt
918 * handler will start any queued transactions when it runs
919 * at the end of the current transaction
920 */
921 if (!dma_is_idle(chan)) {
922 dev_dbg(chan->dev, "DMA controller still busy\n");
923 goto out_unlock;
924 }
872 925
873 /* If there are some link descriptors 926 /*
874 * not transfered in queue. We need to start it. 927 * TODO:
928 * make sure the dma_halt() function really un-wedges the
929 * controller as much as possible
875 */ 930 */
931 dma_halt(chan);
876 932
877 /* Find the first un-transfer desciptor */ 933 /*
878 for (ld_node = fsl_chan->ld_queue.next; 934 * If there are some link descriptors which have not been
879 (ld_node != &fsl_chan->ld_queue) 935 * transferred, we need to start the controller
880 && (dma_async_is_complete( 936 */
881 to_fsl_desc(ld_node)->async_tx.cookie, 937
882 fsl_chan->completed_cookie, 938 /*
883 fsl_chan->common.cookie) == DMA_SUCCESS); 939 * Move all elements from the queue of pending transactions
884 ld_node = ld_node->next); 940 * onto the list of running transactions
885 941 */
886 if (ld_node != &fsl_chan->ld_queue) { 942 desc = list_first_entry(&chan->ld_pending, struct fsl_desc_sw, node);
887 /* Get the ld start address from ld_queue */ 943 list_splice_tail_init(&chan->ld_pending, &chan->ld_running);
888 next_dest_addr = to_fsl_desc(ld_node)->async_tx.phys; 944
889 dev_dbg(fsl_chan->dev, "xfer LDs staring from 0x%llx\n", 945 /*
890 (unsigned long long)next_dest_addr); 946 * Program the descriptor's address into the DMA controller,
891 set_cdar(fsl_chan, next_dest_addr); 947 * then start the DMA transaction
892 dma_start(fsl_chan); 948 */
893 } else { 949 set_cdar(chan, desc->async_tx.phys);
894 set_cdar(fsl_chan, 0); 950 dma_start(chan);
895 set_ndar(fsl_chan, 0);
896 }
897 951
898out_unlock: 952out_unlock:
899 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags); 953 spin_unlock_irqrestore(&chan->desc_lock, flags);
900} 954}
901 955
902/** 956/**
903 * fsl_dma_memcpy_issue_pending - Issue the DMA start command 957 * fsl_dma_memcpy_issue_pending - Issue the DMA start command
904 * @fsl_chan : Freescale DMA channel 958 * @chan : Freescale DMA channel
905 */ 959 */
906static void fsl_dma_memcpy_issue_pending(struct dma_chan *chan) 960static void fsl_dma_memcpy_issue_pending(struct dma_chan *dchan)
907{ 961{
908 struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan); 962 struct fsldma_chan *chan = to_fsl_chan(dchan);
909 963 fsl_chan_xfer_ld_queue(chan);
910#ifdef FSL_DMA_LD_DEBUG
911 struct fsl_desc_sw *ld;
912 unsigned long flags;
913
914 spin_lock_irqsave(&fsl_chan->desc_lock, flags);
915 if (list_empty(&fsl_chan->ld_queue)) {
916 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
917 return;
918 }
919
920 dev_dbg(fsl_chan->dev, "--memcpy issue--\n");
921 list_for_each_entry(ld, &fsl_chan->ld_queue, node) {
922 int i;
923 dev_dbg(fsl_chan->dev, "Ch %d, LD %08x\n",
924 fsl_chan->id, ld->async_tx.phys);
925 for (i = 0; i < 8; i++)
926 dev_dbg(fsl_chan->dev, "LD offset %d: %08x\n",
927 i, *(((u32 *)&ld->hw) + i));
928 }
929 dev_dbg(fsl_chan->dev, "----------------\n");
930 spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
931#endif
932
933 fsl_chan_xfer_ld_queue(fsl_chan);
934} 964}
935 965
936/** 966/**
937 * fsl_dma_is_complete - Determine the DMA status 967 * fsl_dma_is_complete - Determine the DMA status
938 * @fsl_chan : Freescale DMA channel 968 * @chan : Freescale DMA channel
939 */ 969 */
940static enum dma_status fsl_dma_is_complete(struct dma_chan *chan, 970static enum dma_status fsl_dma_is_complete(struct dma_chan *dchan,
941 dma_cookie_t cookie, 971 dma_cookie_t cookie,
942 dma_cookie_t *done, 972 dma_cookie_t *done,
943 dma_cookie_t *used) 973 dma_cookie_t *used)
944{ 974{
945 struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan); 975 struct fsldma_chan *chan = to_fsl_chan(dchan);
946 dma_cookie_t last_used; 976 dma_cookie_t last_used;
947 dma_cookie_t last_complete; 977 dma_cookie_t last_complete;
948 978
949 fsl_chan_ld_cleanup(fsl_chan); 979 fsl_chan_ld_cleanup(chan);
950 980
951 last_used = chan->cookie; 981 last_used = dchan->cookie;
952 last_complete = fsl_chan->completed_cookie; 982 last_complete = chan->completed_cookie;
953 983
954 if (done) 984 if (done)
955 *done = last_complete; 985 *done = last_complete;
@@ -960,32 +990,37 @@ static enum dma_status fsl_dma_is_complete(struct dma_chan *chan,
960 return dma_async_is_complete(cookie, last_complete, last_used); 990 return dma_async_is_complete(cookie, last_complete, last_used);
961} 991}
962 992
963static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data) 993/*----------------------------------------------------------------------------*/
994/* Interrupt Handling */
995/*----------------------------------------------------------------------------*/
996
997static irqreturn_t fsldma_chan_irq(int irq, void *data)
964{ 998{
965 struct fsl_dma_chan *fsl_chan = (struct fsl_dma_chan *)data; 999 struct fsldma_chan *chan = data;
966 u32 stat;
967 int update_cookie = 0; 1000 int update_cookie = 0;
968 int xfer_ld_q = 0; 1001 int xfer_ld_q = 0;
1002 u32 stat;
969 1003
970 stat = get_sr(fsl_chan); 1004 /* save and clear the status register */
971 dev_dbg(fsl_chan->dev, "event: channel %d, stat = 0x%x\n", 1005 stat = get_sr(chan);
972 fsl_chan->id, stat); 1006 set_sr(chan, stat);
973 set_sr(fsl_chan, stat); /* Clear the event register */ 1007 dev_dbg(chan->dev, "irq: channel %d, stat = 0x%x\n", chan->id, stat);
974 1008
975 stat &= ~(FSL_DMA_SR_CB | FSL_DMA_SR_CH); 1009 stat &= ~(FSL_DMA_SR_CB | FSL_DMA_SR_CH);
976 if (!stat) 1010 if (!stat)
977 return IRQ_NONE; 1011 return IRQ_NONE;
978 1012
979 if (stat & FSL_DMA_SR_TE) 1013 if (stat & FSL_DMA_SR_TE)
980 dev_err(fsl_chan->dev, "Transfer Error!\n"); 1014 dev_err(chan->dev, "Transfer Error!\n");
981 1015
982 /* Programming Error 1016 /*
1017 * Programming Error
983 * The DMA_INTERRUPT async_tx is a NULL transfer, which will 1018 * The DMA_INTERRUPT async_tx is a NULL transfer, which will
984 * triger a PE interrupt. 1019 * triger a PE interrupt.
985 */ 1020 */
986 if (stat & FSL_DMA_SR_PE) { 1021 if (stat & FSL_DMA_SR_PE) {
987 dev_dbg(fsl_chan->dev, "event: Programming Error INT\n"); 1022 dev_dbg(chan->dev, "irq: Programming Error INT\n");
988 if (get_bcr(fsl_chan) == 0) { 1023 if (get_bcr(chan) == 0) {
989 /* BCR register is 0, this is a DMA_INTERRUPT async_tx. 1024 /* BCR register is 0, this is a DMA_INTERRUPT async_tx.
990 * Now, update the completed cookie, and continue the 1025 * Now, update the completed cookie, and continue the
991 * next uncompleted transfer. 1026 * next uncompleted transfer.
@@ -996,208 +1031,296 @@ static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data)
996 stat &= ~FSL_DMA_SR_PE; 1031 stat &= ~FSL_DMA_SR_PE;
997 } 1032 }
998 1033
999 /* If the link descriptor segment transfer finishes, 1034 /*
1035 * If the link descriptor segment transfer finishes,
1000 * we will recycle the used descriptor. 1036 * we will recycle the used descriptor.
1001 */ 1037 */
1002 if (stat & FSL_DMA_SR_EOSI) { 1038 if (stat & FSL_DMA_SR_EOSI) {
1003 dev_dbg(fsl_chan->dev, "event: End-of-segments INT\n"); 1039 dev_dbg(chan->dev, "irq: End-of-segments INT\n");
1004 dev_dbg(fsl_chan->dev, "event: clndar 0x%llx, nlndar 0x%llx\n", 1040 dev_dbg(chan->dev, "irq: clndar 0x%llx, nlndar 0x%llx\n",
1005 (unsigned long long)get_cdar(fsl_chan), 1041 (unsigned long long)get_cdar(chan),
1006 (unsigned long long)get_ndar(fsl_chan)); 1042 (unsigned long long)get_ndar(chan));
1007 stat &= ~FSL_DMA_SR_EOSI; 1043 stat &= ~FSL_DMA_SR_EOSI;
1008 update_cookie = 1; 1044 update_cookie = 1;
1009 } 1045 }
1010 1046
1011 /* For MPC8349, EOCDI event need to update cookie 1047 /*
1048 * For MPC8349, EOCDI event need to update cookie
1012 * and start the next transfer if it exist. 1049 * and start the next transfer if it exist.
1013 */ 1050 */
1014 if (stat & FSL_DMA_SR_EOCDI) { 1051 if (stat & FSL_DMA_SR_EOCDI) {
1015 dev_dbg(fsl_chan->dev, "event: End-of-Chain link INT\n"); 1052 dev_dbg(chan->dev, "irq: End-of-Chain link INT\n");
1016 stat &= ~FSL_DMA_SR_EOCDI; 1053 stat &= ~FSL_DMA_SR_EOCDI;
1017 update_cookie = 1; 1054 update_cookie = 1;
1018 xfer_ld_q = 1; 1055 xfer_ld_q = 1;
1019 } 1056 }
1020 1057
1021 /* If it current transfer is the end-of-transfer, 1058 /*
1059 * If it current transfer is the end-of-transfer,
1022 * we should clear the Channel Start bit for 1060 * we should clear the Channel Start bit for
1023 * prepare next transfer. 1061 * prepare next transfer.
1024 */ 1062 */
1025 if (stat & FSL_DMA_SR_EOLNI) { 1063 if (stat & FSL_DMA_SR_EOLNI) {
1026 dev_dbg(fsl_chan->dev, "event: End-of-link INT\n"); 1064 dev_dbg(chan->dev, "irq: End-of-link INT\n");
1027 stat &= ~FSL_DMA_SR_EOLNI; 1065 stat &= ~FSL_DMA_SR_EOLNI;
1028 xfer_ld_q = 1; 1066 xfer_ld_q = 1;
1029 } 1067 }
1030 1068
1031 if (update_cookie) 1069 if (update_cookie)
1032 fsl_dma_update_completed_cookie(fsl_chan); 1070 fsl_dma_update_completed_cookie(chan);
1033 if (xfer_ld_q) 1071 if (xfer_ld_q)
1034 fsl_chan_xfer_ld_queue(fsl_chan); 1072 fsl_chan_xfer_ld_queue(chan);
1035 if (stat) 1073 if (stat)
1036 dev_dbg(fsl_chan->dev, "event: unhandled sr 0x%02x\n", 1074 dev_dbg(chan->dev, "irq: unhandled sr 0x%02x\n", stat);
1037 stat);
1038 1075
1039 dev_dbg(fsl_chan->dev, "event: Exit\n"); 1076 dev_dbg(chan->dev, "irq: Exit\n");
1040 tasklet_schedule(&fsl_chan->tasklet); 1077 tasklet_schedule(&chan->tasklet);
1041 return IRQ_HANDLED; 1078 return IRQ_HANDLED;
1042} 1079}
1043 1080
1044static irqreturn_t fsl_dma_do_interrupt(int irq, void *data) 1081static void dma_do_tasklet(unsigned long data)
1045{ 1082{
1046 struct fsl_dma_device *fdev = (struct fsl_dma_device *)data; 1083 struct fsldma_chan *chan = (struct fsldma_chan *)data;
1047 u32 gsr; 1084 fsl_chan_ld_cleanup(chan);
1048 int ch_nr; 1085}
1086
1087static irqreturn_t fsldma_ctrl_irq(int irq, void *data)
1088{
1089 struct fsldma_device *fdev = data;
1090 struct fsldma_chan *chan;
1091 unsigned int handled = 0;
1092 u32 gsr, mask;
1093 int i;
1049 1094
1050 gsr = (fdev->feature & FSL_DMA_BIG_ENDIAN) ? in_be32(fdev->reg_base) 1095 gsr = (fdev->feature & FSL_DMA_BIG_ENDIAN) ? in_be32(fdev->regs)
1051 : in_le32(fdev->reg_base); 1096 : in_le32(fdev->regs);
1052 ch_nr = (32 - ffs(gsr)) / 8; 1097 mask = 0xff000000;
1098 dev_dbg(fdev->dev, "IRQ: gsr 0x%.8x\n", gsr);
1099
1100 for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
1101 chan = fdev->chan[i];
1102 if (!chan)
1103 continue;
1104
1105 if (gsr & mask) {
1106 dev_dbg(fdev->dev, "IRQ: chan %d\n", chan->id);
1107 fsldma_chan_irq(irq, chan);
1108 handled++;
1109 }
1053 1110
1054 return fdev->chan[ch_nr] ? fsl_dma_chan_do_interrupt(irq, 1111 gsr &= ~mask;
1055 fdev->chan[ch_nr]) : IRQ_NONE; 1112 mask >>= 8;
1113 }
1114
1115 return IRQ_RETVAL(handled);
1056} 1116}
1057 1117
1058static void dma_do_tasklet(unsigned long data) 1118static void fsldma_free_irqs(struct fsldma_device *fdev)
1059{ 1119{
1060 struct fsl_dma_chan *fsl_chan = (struct fsl_dma_chan *)data; 1120 struct fsldma_chan *chan;
1061 fsl_chan_ld_cleanup(fsl_chan); 1121 int i;
1122
1123 if (fdev->irq != NO_IRQ) {
1124 dev_dbg(fdev->dev, "free per-controller IRQ\n");
1125 free_irq(fdev->irq, fdev);
1126 return;
1127 }
1128
1129 for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
1130 chan = fdev->chan[i];
1131 if (chan && chan->irq != NO_IRQ) {
1132 dev_dbg(fdev->dev, "free channel %d IRQ\n", chan->id);
1133 free_irq(chan->irq, chan);
1134 }
1135 }
1062} 1136}
1063 1137
1064static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev, 1138static int fsldma_request_irqs(struct fsldma_device *fdev)
1139{
1140 struct fsldma_chan *chan;
1141 int ret;
1142 int i;
1143
1144 /* if we have a per-controller IRQ, use that */
1145 if (fdev->irq != NO_IRQ) {
1146 dev_dbg(fdev->dev, "request per-controller IRQ\n");
1147 ret = request_irq(fdev->irq, fsldma_ctrl_irq, IRQF_SHARED,
1148 "fsldma-controller", fdev);
1149 return ret;
1150 }
1151
1152 /* no per-controller IRQ, use the per-channel IRQs */
1153 for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
1154 chan = fdev->chan[i];
1155 if (!chan)
1156 continue;
1157
1158 if (chan->irq == NO_IRQ) {
1159 dev_err(fdev->dev, "no interrupts property defined for "
1160 "DMA channel %d. Please fix your "
1161 "device tree\n", chan->id);
1162 ret = -ENODEV;
1163 goto out_unwind;
1164 }
1165
1166 dev_dbg(fdev->dev, "request channel %d IRQ\n", chan->id);
1167 ret = request_irq(chan->irq, fsldma_chan_irq, IRQF_SHARED,
1168 "fsldma-chan", chan);
1169 if (ret) {
1170 dev_err(fdev->dev, "unable to request IRQ for DMA "
1171 "channel %d\n", chan->id);
1172 goto out_unwind;
1173 }
1174 }
1175
1176 return 0;
1177
1178out_unwind:
1179 for (/* none */; i >= 0; i--) {
1180 chan = fdev->chan[i];
1181 if (!chan)
1182 continue;
1183
1184 if (chan->irq == NO_IRQ)
1185 continue;
1186
1187 free_irq(chan->irq, chan);
1188 }
1189
1190 return ret;
1191}
1192
1193/*----------------------------------------------------------------------------*/
1194/* OpenFirmware Subsystem */
1195/*----------------------------------------------------------------------------*/
1196
1197static int __devinit fsl_dma_chan_probe(struct fsldma_device *fdev,
1065 struct device_node *node, u32 feature, const char *compatible) 1198 struct device_node *node, u32 feature, const char *compatible)
1066{ 1199{
1067 struct fsl_dma_chan *new_fsl_chan; 1200 struct fsldma_chan *chan;
1201 struct resource res;
1068 int err; 1202 int err;
1069 1203
1070 /* alloc channel */ 1204 /* alloc channel */
1071 new_fsl_chan = kzalloc(sizeof(struct fsl_dma_chan), GFP_KERNEL); 1205 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1072 if (!new_fsl_chan) { 1206 if (!chan) {
1073 dev_err(fdev->dev, "No free memory for allocating " 1207 dev_err(fdev->dev, "no free memory for DMA channels!\n");
1074 "dma channels!\n"); 1208 err = -ENOMEM;
1075 return -ENOMEM; 1209 goto out_return;
1076 } 1210 }
1077 1211
1078 /* get dma channel register base */ 1212 /* ioremap registers for use */
1079 err = of_address_to_resource(node, 0, &new_fsl_chan->reg); 1213 chan->regs = of_iomap(node, 0);
1080 if (err) { 1214 if (!chan->regs) {
1081 dev_err(fdev->dev, "Can't get %s property 'reg'\n", 1215 dev_err(fdev->dev, "unable to ioremap registers\n");
1082 node->full_name); 1216 err = -ENOMEM;
1083 goto err_no_reg; 1217 goto out_free_chan;
1084 } 1218 }
1085 1219
1086 new_fsl_chan->feature = feature; 1220 err = of_address_to_resource(node, 0, &res);
1221 if (err) {
1222 dev_err(fdev->dev, "unable to find 'reg' property\n");
1223 goto out_iounmap_regs;
1224 }
1087 1225
1226 chan->feature = feature;
1088 if (!fdev->feature) 1227 if (!fdev->feature)
1089 fdev->feature = new_fsl_chan->feature; 1228 fdev->feature = chan->feature;
1090 1229
1091 /* If the DMA device's feature is different than its channels', 1230 /*
1092 * report the bug. 1231 * If the DMA device's feature is different than the feature
1232 * of its channels, report the bug
1093 */ 1233 */
1094 WARN_ON(fdev->feature != new_fsl_chan->feature); 1234 WARN_ON(fdev->feature != chan->feature);
1095 1235
1096 new_fsl_chan->dev = fdev->dev; 1236 chan->dev = fdev->dev;
1097 new_fsl_chan->reg_base = ioremap(new_fsl_chan->reg.start, 1237 chan->id = ((res.start - 0x100) & 0xfff) >> 7;
1098 new_fsl_chan->reg.end - new_fsl_chan->reg.start + 1); 1238 if (chan->id >= FSL_DMA_MAX_CHANS_PER_DEVICE) {
1099 1239 dev_err(fdev->dev, "too many channels for device\n");
1100 new_fsl_chan->id = ((new_fsl_chan->reg.start - 0x100) & 0xfff) >> 7;
1101 if (new_fsl_chan->id >= FSL_DMA_MAX_CHANS_PER_DEVICE) {
1102 dev_err(fdev->dev, "There is no %d channel!\n",
1103 new_fsl_chan->id);
1104 err = -EINVAL; 1240 err = -EINVAL;
1105 goto err_no_chan; 1241 goto out_iounmap_regs;
1106 } 1242 }
1107 fdev->chan[new_fsl_chan->id] = new_fsl_chan;
1108 tasklet_init(&new_fsl_chan->tasklet, dma_do_tasklet,
1109 (unsigned long)new_fsl_chan);
1110 1243
1111 /* Init the channel */ 1244 fdev->chan[chan->id] = chan;
1112 dma_init(new_fsl_chan); 1245 tasklet_init(&chan->tasklet, dma_do_tasklet, (unsigned long)chan);
1246
1247 /* Initialize the channel */
1248 dma_init(chan);
1113 1249
1114 /* Clear cdar registers */ 1250 /* Clear cdar registers */
1115 set_cdar(new_fsl_chan, 0); 1251 set_cdar(chan, 0);
1116 1252
1117 switch (new_fsl_chan->feature & FSL_DMA_IP_MASK) { 1253 switch (chan->feature & FSL_DMA_IP_MASK) {
1118 case FSL_DMA_IP_85XX: 1254 case FSL_DMA_IP_85XX:
1119 new_fsl_chan->toggle_ext_pause = fsl_chan_toggle_ext_pause; 1255 chan->toggle_ext_pause = fsl_chan_toggle_ext_pause;
1120 case FSL_DMA_IP_83XX: 1256 case FSL_DMA_IP_83XX:
1121 new_fsl_chan->toggle_ext_start = fsl_chan_toggle_ext_start; 1257 chan->toggle_ext_start = fsl_chan_toggle_ext_start;
1122 new_fsl_chan->set_src_loop_size = fsl_chan_set_src_loop_size; 1258 chan->set_src_loop_size = fsl_chan_set_src_loop_size;
1123 new_fsl_chan->set_dest_loop_size = fsl_chan_set_dest_loop_size; 1259 chan->set_dst_loop_size = fsl_chan_set_dst_loop_size;
1124 new_fsl_chan->set_request_count = fsl_chan_set_request_count; 1260 chan->set_request_count = fsl_chan_set_request_count;
1125 } 1261 }
1126 1262
1127 spin_lock_init(&new_fsl_chan->desc_lock); 1263 spin_lock_init(&chan->desc_lock);
1128 INIT_LIST_HEAD(&new_fsl_chan->ld_queue); 1264 INIT_LIST_HEAD(&chan->ld_pending);
1265 INIT_LIST_HEAD(&chan->ld_running);
1266
1267 chan->common.device = &fdev->common;
1129 1268
1130 new_fsl_chan->common.device = &fdev->common; 1269 /* find the IRQ line, if it exists in the device tree */
1270 chan->irq = irq_of_parse_and_map(node, 0);
1131 1271
1132 /* Add the channel to DMA device channel list */ 1272 /* Add the channel to DMA device channel list */
1133 list_add_tail(&new_fsl_chan->common.device_node, 1273 list_add_tail(&chan->common.device_node, &fdev->common.channels);
1134 &fdev->common.channels);
1135 fdev->common.chancnt++; 1274 fdev->common.chancnt++;
1136 1275
1137 new_fsl_chan->irq = irq_of_parse_and_map(node, 0); 1276 dev_info(fdev->dev, "#%d (%s), irq %d\n", chan->id, compatible,
1138 if (new_fsl_chan->irq != NO_IRQ) { 1277 chan->irq != NO_IRQ ? chan->irq : fdev->irq);
1139 err = request_irq(new_fsl_chan->irq,
1140 &fsl_dma_chan_do_interrupt, IRQF_SHARED,
1141 "fsldma-channel", new_fsl_chan);
1142 if (err) {
1143 dev_err(fdev->dev, "DMA channel %s request_irq error "
1144 "with return %d\n", node->full_name, err);
1145 goto err_no_irq;
1146 }
1147 }
1148
1149 dev_info(fdev->dev, "#%d (%s), irq %d\n", new_fsl_chan->id,
1150 compatible,
1151 new_fsl_chan->irq != NO_IRQ ? new_fsl_chan->irq : fdev->irq);
1152 1278
1153 return 0; 1279 return 0;
1154 1280
1155err_no_irq: 1281out_iounmap_regs:
1156 list_del(&new_fsl_chan->common.device_node); 1282 iounmap(chan->regs);
1157err_no_chan: 1283out_free_chan:
1158 iounmap(new_fsl_chan->reg_base); 1284 kfree(chan);
1159err_no_reg: 1285out_return:
1160 kfree(new_fsl_chan);
1161 return err; 1286 return err;
1162} 1287}
1163 1288
1164static void fsl_dma_chan_remove(struct fsl_dma_chan *fchan) 1289static void fsl_dma_chan_remove(struct fsldma_chan *chan)
1165{ 1290{
1166 if (fchan->irq != NO_IRQ) 1291 irq_dispose_mapping(chan->irq);
1167 free_irq(fchan->irq, fchan); 1292 list_del(&chan->common.device_node);
1168 list_del(&fchan->common.device_node); 1293 iounmap(chan->regs);
1169 iounmap(fchan->reg_base); 1294 kfree(chan);
1170 kfree(fchan);
1171} 1295}
1172 1296
1173static int __devinit of_fsl_dma_probe(struct of_device *dev, 1297static int __devinit fsldma_of_probe(struct of_device *op,
1174 const struct of_device_id *match) 1298 const struct of_device_id *match)
1175{ 1299{
1176 int err; 1300 struct fsldma_device *fdev;
1177 struct fsl_dma_device *fdev;
1178 struct device_node *child; 1301 struct device_node *child;
1302 int err;
1179 1303
1180 fdev = kzalloc(sizeof(struct fsl_dma_device), GFP_KERNEL); 1304 fdev = kzalloc(sizeof(*fdev), GFP_KERNEL);
1181 if (!fdev) { 1305 if (!fdev) {
1182 dev_err(&dev->dev, "No enough memory for 'priv'\n"); 1306 dev_err(&op->dev, "No enough memory for 'priv'\n");
1183 return -ENOMEM; 1307 err = -ENOMEM;
1308 goto out_return;
1184 } 1309 }
1185 fdev->dev = &dev->dev; 1310
1311 fdev->dev = &op->dev;
1186 INIT_LIST_HEAD(&fdev->common.channels); 1312 INIT_LIST_HEAD(&fdev->common.channels);
1187 1313
1188 /* get DMA controller register base */ 1314 /* ioremap the registers for use */
1189 err = of_address_to_resource(dev->node, 0, &fdev->reg); 1315 fdev->regs = of_iomap(op->node, 0);
1190 if (err) { 1316 if (!fdev->regs) {
1191 dev_err(&dev->dev, "Can't get %s property 'reg'\n", 1317 dev_err(&op->dev, "unable to ioremap registers\n");
1192 dev->node->full_name); 1318 err = -ENOMEM;
1193 goto err_no_reg; 1319 goto out_free_fdev;
1194 } 1320 }
1195 1321
1196 dev_info(&dev->dev, "Probe the Freescale DMA driver for %s " 1322 /* map the channel IRQ if it exists, but don't hookup the handler yet */
1197 "controller at 0x%llx...\n", 1323 fdev->irq = irq_of_parse_and_map(op->node, 0);
1198 match->compatible, (unsigned long long)fdev->reg.start);
1199 fdev->reg_base = ioremap(fdev->reg.start, fdev->reg.end
1200 - fdev->reg.start + 1);
1201 1324
1202 dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask); 1325 dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask);
1203 dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask); 1326 dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask);
@@ -1210,103 +1333,111 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev,
1210 fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending; 1333 fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending;
1211 fdev->common.device_prep_slave_sg = fsl_dma_prep_slave_sg; 1334 fdev->common.device_prep_slave_sg = fsl_dma_prep_slave_sg;
1212 fdev->common.device_terminate_all = fsl_dma_device_terminate_all; 1335 fdev->common.device_terminate_all = fsl_dma_device_terminate_all;
1213 fdev->common.dev = &dev->dev; 1336 fdev->common.dev = &op->dev;
1214 1337
1215 fdev->irq = irq_of_parse_and_map(dev->node, 0); 1338 dev_set_drvdata(&op->dev, fdev);
1216 if (fdev->irq != NO_IRQ) {
1217 err = request_irq(fdev->irq, &fsl_dma_do_interrupt, IRQF_SHARED,
1218 "fsldma-device", fdev);
1219 if (err) {
1220 dev_err(&dev->dev, "DMA device request_irq error "
1221 "with return %d\n", err);
1222 goto err;
1223 }
1224 }
1225
1226 dev_set_drvdata(&(dev->dev), fdev);
1227 1339
1228 /* We cannot use of_platform_bus_probe() because there is no 1340 /*
1229 * of_platform_bus_remove. Instead, we manually instantiate every DMA 1341 * We cannot use of_platform_bus_probe() because there is no
1342 * of_platform_bus_remove(). Instead, we manually instantiate every DMA
1230 * channel object. 1343 * channel object.
1231 */ 1344 */
1232 for_each_child_of_node(dev->node, child) { 1345 for_each_child_of_node(op->node, child) {
1233 if (of_device_is_compatible(child, "fsl,eloplus-dma-channel")) 1346 if (of_device_is_compatible(child, "fsl,eloplus-dma-channel")) {
1234 fsl_dma_chan_probe(fdev, child, 1347 fsl_dma_chan_probe(fdev, child,
1235 FSL_DMA_IP_85XX | FSL_DMA_BIG_ENDIAN, 1348 FSL_DMA_IP_85XX | FSL_DMA_BIG_ENDIAN,
1236 "fsl,eloplus-dma-channel"); 1349 "fsl,eloplus-dma-channel");
1237 if (of_device_is_compatible(child, "fsl,elo-dma-channel")) 1350 }
1351
1352 if (of_device_is_compatible(child, "fsl,elo-dma-channel")) {
1238 fsl_dma_chan_probe(fdev, child, 1353 fsl_dma_chan_probe(fdev, child,
1239 FSL_DMA_IP_83XX | FSL_DMA_LITTLE_ENDIAN, 1354 FSL_DMA_IP_83XX | FSL_DMA_LITTLE_ENDIAN,
1240 "fsl,elo-dma-channel"); 1355 "fsl,elo-dma-channel");
1356 }
1357 }
1358
1359 /*
1360 * Hookup the IRQ handler(s)
1361 *
1362 * If we have a per-controller interrupt, we prefer that to the
1363 * per-channel interrupts to reduce the number of shared interrupt
1364 * handlers on the same IRQ line
1365 */
1366 err = fsldma_request_irqs(fdev);
1367 if (err) {
1368 dev_err(fdev->dev, "unable to request IRQs\n");
1369 goto out_free_fdev;
1241 } 1370 }
1242 1371
1243 dma_async_device_register(&fdev->common); 1372 dma_async_device_register(&fdev->common);
1244 return 0; 1373 return 0;
1245 1374
1246err: 1375out_free_fdev:
1247 iounmap(fdev->reg_base); 1376 irq_dispose_mapping(fdev->irq);
1248err_no_reg:
1249 kfree(fdev); 1377 kfree(fdev);
1378out_return:
1250 return err; 1379 return err;
1251} 1380}
1252 1381
1253static int of_fsl_dma_remove(struct of_device *of_dev) 1382static int fsldma_of_remove(struct of_device *op)
1254{ 1383{
1255 struct fsl_dma_device *fdev; 1384 struct fsldma_device *fdev;
1256 unsigned int i; 1385 unsigned int i;
1257 1386
1258 fdev = dev_get_drvdata(&of_dev->dev); 1387 fdev = dev_get_drvdata(&op->dev);
1259
1260 dma_async_device_unregister(&fdev->common); 1388 dma_async_device_unregister(&fdev->common);
1261 1389
1262 for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) 1390 fsldma_free_irqs(fdev);
1391
1392 for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
1263 if (fdev->chan[i]) 1393 if (fdev->chan[i])
1264 fsl_dma_chan_remove(fdev->chan[i]); 1394 fsl_dma_chan_remove(fdev->chan[i]);
1395 }
1265 1396
1266 if (fdev->irq != NO_IRQ) 1397 iounmap(fdev->regs);
1267 free_irq(fdev->irq, fdev); 1398 dev_set_drvdata(&op->dev, NULL);
1268
1269 iounmap(fdev->reg_base);
1270
1271 kfree(fdev); 1399 kfree(fdev);
1272 dev_set_drvdata(&of_dev->dev, NULL);
1273 1400
1274 return 0; 1401 return 0;
1275} 1402}
1276 1403
1277static struct of_device_id of_fsl_dma_ids[] = { 1404static const struct of_device_id fsldma_of_ids[] = {
1278 { .compatible = "fsl,eloplus-dma", }, 1405 { .compatible = "fsl,eloplus-dma", },
1279 { .compatible = "fsl,elo-dma", }, 1406 { .compatible = "fsl,elo-dma", },
1280 {} 1407 {}
1281}; 1408};
1282 1409
1283static struct of_platform_driver of_fsl_dma_driver = { 1410static struct of_platform_driver fsldma_of_driver = {
1284 .name = "fsl-elo-dma", 1411 .name = "fsl-elo-dma",
1285 .match_table = of_fsl_dma_ids, 1412 .match_table = fsldma_of_ids,
1286 .probe = of_fsl_dma_probe, 1413 .probe = fsldma_of_probe,
1287 .remove = of_fsl_dma_remove, 1414 .remove = fsldma_of_remove,
1288}; 1415};
1289 1416
1290static __init int of_fsl_dma_init(void) 1417/*----------------------------------------------------------------------------*/
1418/* Module Init / Exit */
1419/*----------------------------------------------------------------------------*/
1420
1421static __init int fsldma_init(void)
1291{ 1422{
1292 int ret; 1423 int ret;
1293 1424
1294 pr_info("Freescale Elo / Elo Plus DMA driver\n"); 1425 pr_info("Freescale Elo / Elo Plus DMA driver\n");
1295 1426
1296 ret = of_register_platform_driver(&of_fsl_dma_driver); 1427 ret = of_register_platform_driver(&fsldma_of_driver);
1297 if (ret) 1428 if (ret)
1298 pr_err("fsldma: failed to register platform driver\n"); 1429 pr_err("fsldma: failed to register platform driver\n");
1299 1430
1300 return ret; 1431 return ret;
1301} 1432}
1302 1433
1303static void __exit of_fsl_dma_exit(void) 1434static void __exit fsldma_exit(void)
1304{ 1435{
1305 of_unregister_platform_driver(&of_fsl_dma_driver); 1436 of_unregister_platform_driver(&fsldma_of_driver);
1306} 1437}
1307 1438
1308subsys_initcall(of_fsl_dma_init); 1439subsys_initcall(fsldma_init);
1309module_exit(of_fsl_dma_exit); 1440module_exit(fsldma_exit);
1310 1441
1311MODULE_DESCRIPTION("Freescale Elo / Elo Plus DMA driver"); 1442MODULE_DESCRIPTION("Freescale Elo / Elo Plus DMA driver");
1312MODULE_LICENSE("GPL"); 1443MODULE_LICENSE("GPL");
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index 0df14cbb8ca3..cb4d6ff51597 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -92,11 +92,9 @@ struct fsl_desc_sw {
92 struct list_head node; 92 struct list_head node;
93 struct list_head tx_list; 93 struct list_head tx_list;
94 struct dma_async_tx_descriptor async_tx; 94 struct dma_async_tx_descriptor async_tx;
95 struct list_head *ld;
96 void *priv;
97} __attribute__((aligned(32))); 95} __attribute__((aligned(32)));
98 96
99struct fsl_dma_chan_regs { 97struct fsldma_chan_regs {
100 u32 mr; /* 0x00 - Mode Register */ 98 u32 mr; /* 0x00 - Mode Register */
101 u32 sr; /* 0x04 - Status Register */ 99 u32 sr; /* 0x04 - Status Register */
102 u64 cdar; /* 0x08 - Current descriptor address register */ 100 u64 cdar; /* 0x08 - Current descriptor address register */
@@ -106,20 +104,19 @@ struct fsl_dma_chan_regs {
106 u64 ndar; /* 0x24 - Next Descriptor Address Register */ 104 u64 ndar; /* 0x24 - Next Descriptor Address Register */
107}; 105};
108 106
109struct fsl_dma_chan; 107struct fsldma_chan;
110#define FSL_DMA_MAX_CHANS_PER_DEVICE 4 108#define FSL_DMA_MAX_CHANS_PER_DEVICE 4
111 109
112struct fsl_dma_device { 110struct fsldma_device {
113 void __iomem *reg_base; /* DGSR register base */ 111 void __iomem *regs; /* DGSR register base */
114 struct resource reg; /* Resource for register */
115 struct device *dev; 112 struct device *dev;
116 struct dma_device common; 113 struct dma_device common;
117 struct fsl_dma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE]; 114 struct fsldma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE];
118 u32 feature; /* The same as DMA channels */ 115 u32 feature; /* The same as DMA channels */
119 int irq; /* Channel IRQ */ 116 int irq; /* Channel IRQ */
120}; 117};
121 118
122/* Define macros for fsl_dma_chan->feature property */ 119/* Define macros for fsldma_chan->feature property */
123#define FSL_DMA_LITTLE_ENDIAN 0x00000000 120#define FSL_DMA_LITTLE_ENDIAN 0x00000000
124#define FSL_DMA_BIG_ENDIAN 0x00000001 121#define FSL_DMA_BIG_ENDIAN 0x00000001
125 122
@@ -130,28 +127,28 @@ struct fsl_dma_device {
130#define FSL_DMA_CHAN_PAUSE_EXT 0x00001000 127#define FSL_DMA_CHAN_PAUSE_EXT 0x00001000
131#define FSL_DMA_CHAN_START_EXT 0x00002000 128#define FSL_DMA_CHAN_START_EXT 0x00002000
132 129
133struct fsl_dma_chan { 130struct fsldma_chan {
134 struct fsl_dma_chan_regs __iomem *reg_base; 131 struct fsldma_chan_regs __iomem *regs;
135 dma_cookie_t completed_cookie; /* The maximum cookie completed */ 132 dma_cookie_t completed_cookie; /* The maximum cookie completed */
136 spinlock_t desc_lock; /* Descriptor operation lock */ 133 spinlock_t desc_lock; /* Descriptor operation lock */
137 struct list_head ld_queue; /* Link descriptors queue */ 134 struct list_head ld_pending; /* Link descriptors queue */
135 struct list_head ld_running; /* Link descriptors queue */
138 struct dma_chan common; /* DMA common channel */ 136 struct dma_chan common; /* DMA common channel */
139 struct dma_pool *desc_pool; /* Descriptors pool */ 137 struct dma_pool *desc_pool; /* Descriptors pool */
140 struct device *dev; /* Channel device */ 138 struct device *dev; /* Channel device */
141 struct resource reg; /* Resource for register */
142 int irq; /* Channel IRQ */ 139 int irq; /* Channel IRQ */
143 int id; /* Raw id of this channel */ 140 int id; /* Raw id of this channel */
144 struct tasklet_struct tasklet; 141 struct tasklet_struct tasklet;
145 u32 feature; 142 u32 feature;
146 143
147 void (*toggle_ext_pause)(struct fsl_dma_chan *fsl_chan, int enable); 144 void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
148 void (*toggle_ext_start)(struct fsl_dma_chan *fsl_chan, int enable); 145 void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);
149 void (*set_src_loop_size)(struct fsl_dma_chan *fsl_chan, int size); 146 void (*set_src_loop_size)(struct fsldma_chan *fsl_chan, int size);
150 void (*set_dest_loop_size)(struct fsl_dma_chan *fsl_chan, int size); 147 void (*set_dst_loop_size)(struct fsldma_chan *fsl_chan, int size);
151 void (*set_request_count)(struct fsl_dma_chan *fsl_chan, int size); 148 void (*set_request_count)(struct fsldma_chan *fsl_chan, int size);
152}; 149};
153 150
154#define to_fsl_chan(chan) container_of(chan, struct fsl_dma_chan, common) 151#define to_fsl_chan(chan) container_of(chan, struct fsldma_chan, common)
155#define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node) 152#define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node)
156#define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx) 153#define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx)
157 154
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index dcc4ab78b32b..5d0e42b263df 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -94,16 +94,12 @@ static irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
94 return IRQ_HANDLED; 94 return IRQ_HANDLED;
95} 95}
96 96
97static void ioat1_cleanup_tasklet(unsigned long data);
98
99/* common channel initialization */ 97/* common channel initialization */
100void ioat_init_channel(struct ioatdma_device *device, 98void ioat_init_channel(struct ioatdma_device *device, struct ioat_chan_common *chan, int idx)
101 struct ioat_chan_common *chan, int idx,
102 void (*timer_fn)(unsigned long),
103 void (*tasklet)(unsigned long),
104 unsigned long ioat)
105{ 99{
106 struct dma_device *dma = &device->common; 100 struct dma_device *dma = &device->common;
101 struct dma_chan *c = &chan->common;
102 unsigned long data = (unsigned long) c;
107 103
108 chan->device = device; 104 chan->device = device;
109 chan->reg_base = device->reg_base + (0x80 * (idx + 1)); 105 chan->reg_base = device->reg_base + (0x80 * (idx + 1));
@@ -112,14 +108,12 @@ void ioat_init_channel(struct ioatdma_device *device,
112 list_add_tail(&chan->common.device_node, &dma->channels); 108 list_add_tail(&chan->common.device_node, &dma->channels);
113 device->idx[idx] = chan; 109 device->idx[idx] = chan;
114 init_timer(&chan->timer); 110 init_timer(&chan->timer);
115 chan->timer.function = timer_fn; 111 chan->timer.function = device->timer_fn;
116 chan->timer.data = ioat; 112 chan->timer.data = data;
117 tasklet_init(&chan->cleanup_task, tasklet, ioat); 113 tasklet_init(&chan->cleanup_task, device->cleanup_fn, data);
118 tasklet_disable(&chan->cleanup_task); 114 tasklet_disable(&chan->cleanup_task);
119} 115}
120 116
121static void ioat1_timer_event(unsigned long data);
122
123/** 117/**
124 * ioat1_dma_enumerate_channels - find and initialize the device's channels 118 * ioat1_dma_enumerate_channels - find and initialize the device's channels
125 * @device: the device to be enumerated 119 * @device: the device to be enumerated
@@ -155,10 +149,7 @@ static int ioat1_enumerate_channels(struct ioatdma_device *device)
155 if (!ioat) 149 if (!ioat)
156 break; 150 break;
157 151
158 ioat_init_channel(device, &ioat->base, i, 152 ioat_init_channel(device, &ioat->base, i);
159 ioat1_timer_event,
160 ioat1_cleanup_tasklet,
161 (unsigned long) ioat);
162 ioat->xfercap = xfercap; 153 ioat->xfercap = xfercap;
163 spin_lock_init(&ioat->desc_lock); 154 spin_lock_init(&ioat->desc_lock);
164 INIT_LIST_HEAD(&ioat->free_desc); 155 INIT_LIST_HEAD(&ioat->free_desc);
@@ -532,12 +523,12 @@ ioat1_dma_prep_memcpy(struct dma_chan *c, dma_addr_t dma_dest,
532 return &desc->txd; 523 return &desc->txd;
533} 524}
534 525
535static void ioat1_cleanup_tasklet(unsigned long data) 526static void ioat1_cleanup_event(unsigned long data)
536{ 527{
537 struct ioat_dma_chan *chan = (void *)data; 528 struct ioat_dma_chan *ioat = to_ioat_chan((void *) data);
538 529
539 ioat1_cleanup(chan); 530 ioat1_cleanup(ioat);
540 writew(IOAT_CHANCTRL_RUN, chan->base.reg_base + IOAT_CHANCTRL_OFFSET); 531 writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
541} 532}
542 533
543void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags, 534void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags,
@@ -687,7 +678,7 @@ static void ioat1_cleanup(struct ioat_dma_chan *ioat)
687 678
688static void ioat1_timer_event(unsigned long data) 679static void ioat1_timer_event(unsigned long data)
689{ 680{
690 struct ioat_dma_chan *ioat = (void *) data; 681 struct ioat_dma_chan *ioat = to_ioat_chan((void *) data);
691 struct ioat_chan_common *chan = &ioat->base; 682 struct ioat_chan_common *chan = &ioat->base;
692 683
693 dev_dbg(to_dev(chan), "%s: state: %lx\n", __func__, chan->state); 684 dev_dbg(to_dev(chan), "%s: state: %lx\n", __func__, chan->state);
@@ -734,16 +725,17 @@ static void ioat1_timer_event(unsigned long data)
734 spin_unlock_bh(&chan->cleanup_lock); 725 spin_unlock_bh(&chan->cleanup_lock);
735} 726}
736 727
737static enum dma_status 728enum dma_status
738ioat1_dma_is_complete(struct dma_chan *c, dma_cookie_t cookie, 729ioat_is_dma_complete(struct dma_chan *c, dma_cookie_t cookie,
739 dma_cookie_t *done, dma_cookie_t *used) 730 dma_cookie_t *done, dma_cookie_t *used)
740{ 731{
741 struct ioat_dma_chan *ioat = to_ioat_chan(c); 732 struct ioat_chan_common *chan = to_chan_common(c);
733 struct ioatdma_device *device = chan->device;
742 734
743 if (ioat_is_complete(c, cookie, done, used) == DMA_SUCCESS) 735 if (ioat_is_complete(c, cookie, done, used) == DMA_SUCCESS)
744 return DMA_SUCCESS; 736 return DMA_SUCCESS;
745 737
746 ioat1_cleanup(ioat); 738 device->cleanup_fn((unsigned long) c);
747 739
748 return ioat_is_complete(c, cookie, done, used); 740 return ioat_is_complete(c, cookie, done, used);
749} 741}
@@ -1199,12 +1191,14 @@ int __devinit ioat1_dma_probe(struct ioatdma_device *device, int dca)
1199 device->intr_quirk = ioat1_intr_quirk; 1191 device->intr_quirk = ioat1_intr_quirk;
1200 device->enumerate_channels = ioat1_enumerate_channels; 1192 device->enumerate_channels = ioat1_enumerate_channels;
1201 device->self_test = ioat_dma_self_test; 1193 device->self_test = ioat_dma_self_test;
1194 device->timer_fn = ioat1_timer_event;
1195 device->cleanup_fn = ioat1_cleanup_event;
1202 dma = &device->common; 1196 dma = &device->common;
1203 dma->device_prep_dma_memcpy = ioat1_dma_prep_memcpy; 1197 dma->device_prep_dma_memcpy = ioat1_dma_prep_memcpy;
1204 dma->device_issue_pending = ioat1_dma_memcpy_issue_pending; 1198 dma->device_issue_pending = ioat1_dma_memcpy_issue_pending;
1205 dma->device_alloc_chan_resources = ioat1_dma_alloc_chan_resources; 1199 dma->device_alloc_chan_resources = ioat1_dma_alloc_chan_resources;
1206 dma->device_free_chan_resources = ioat1_dma_free_chan_resources; 1200 dma->device_free_chan_resources = ioat1_dma_free_chan_resources;
1207 dma->device_is_tx_complete = ioat1_dma_is_complete; 1201 dma->device_is_tx_complete = ioat_is_dma_complete;
1208 1202
1209 err = ioat_probe(device); 1203 err = ioat_probe(device);
1210 if (err) 1204 if (err)
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index bbc3e78ef333..4f747a254074 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -61,7 +61,7 @@
61 * @intr_quirk: interrupt setup quirk (for ioat_v1 devices) 61 * @intr_quirk: interrupt setup quirk (for ioat_v1 devices)
62 * @enumerate_channels: hw version specific channel enumeration 62 * @enumerate_channels: hw version specific channel enumeration
63 * @reset_hw: hw version specific channel (re)initialization 63 * @reset_hw: hw version specific channel (re)initialization
64 * @cleanup_tasklet: select between the v2 and v3 cleanup routines 64 * @cleanup_fn: select between the v2 and v3 cleanup routines
65 * @timer_fn: select between the v2 and v3 timer watchdog routines 65 * @timer_fn: select between the v2 and v3 timer watchdog routines
66 * @self_test: hardware version specific self test for each supported op type 66 * @self_test: hardware version specific self test for each supported op type
67 * 67 *
@@ -80,7 +80,7 @@ struct ioatdma_device {
80 void (*intr_quirk)(struct ioatdma_device *device); 80 void (*intr_quirk)(struct ioatdma_device *device);
81 int (*enumerate_channels)(struct ioatdma_device *device); 81 int (*enumerate_channels)(struct ioatdma_device *device);
82 int (*reset_hw)(struct ioat_chan_common *chan); 82 int (*reset_hw)(struct ioat_chan_common *chan);
83 void (*cleanup_tasklet)(unsigned long data); 83 void (*cleanup_fn)(unsigned long data);
84 void (*timer_fn)(unsigned long data); 84 void (*timer_fn)(unsigned long data);
85 int (*self_test)(struct ioatdma_device *device); 85 int (*self_test)(struct ioatdma_device *device);
86}; 86};
@@ -337,10 +337,9 @@ struct dca_provider * __devinit ioat_dca_init(struct pci_dev *pdev,
337 void __iomem *iobase); 337 void __iomem *iobase);
338unsigned long ioat_get_current_completion(struct ioat_chan_common *chan); 338unsigned long ioat_get_current_completion(struct ioat_chan_common *chan);
339void ioat_init_channel(struct ioatdma_device *device, 339void ioat_init_channel(struct ioatdma_device *device,
340 struct ioat_chan_common *chan, int idx, 340 struct ioat_chan_common *chan, int idx);
341 void (*timer_fn)(unsigned long), 341enum dma_status ioat_is_dma_complete(struct dma_chan *c, dma_cookie_t cookie,
342 void (*tasklet)(unsigned long), 342 dma_cookie_t *done, dma_cookie_t *used);
343 unsigned long ioat);
344void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags, 343void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags,
345 size_t len, struct ioat_dma_descriptor *hw); 344 size_t len, struct ioat_dma_descriptor *hw);
346bool ioat_cleanup_preamble(struct ioat_chan_common *chan, 345bool ioat_cleanup_preamble(struct ioat_chan_common *chan,
diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 5cc37afe2bc1..1ed5d66d7dca 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -51,48 +51,40 @@ MODULE_PARM_DESC(ioat_ring_max_alloc_order,
51 51
52void __ioat2_issue_pending(struct ioat2_dma_chan *ioat) 52void __ioat2_issue_pending(struct ioat2_dma_chan *ioat)
53{ 53{
54 void * __iomem reg_base = ioat->base.reg_base; 54 struct ioat_chan_common *chan = &ioat->base;
55 55
56 ioat->pending = 0;
57 ioat->dmacount += ioat2_ring_pending(ioat); 56 ioat->dmacount += ioat2_ring_pending(ioat);
58 ioat->issued = ioat->head; 57 ioat->issued = ioat->head;
59 /* make descriptor updates globally visible before notifying channel */ 58 /* make descriptor updates globally visible before notifying channel */
60 wmb(); 59 wmb();
61 writew(ioat->dmacount, reg_base + IOAT_CHAN_DMACOUNT_OFFSET); 60 writew(ioat->dmacount, chan->reg_base + IOAT_CHAN_DMACOUNT_OFFSET);
62 dev_dbg(to_dev(&ioat->base), 61 dev_dbg(to_dev(chan),
63 "%s: head: %#x tail: %#x issued: %#x count: %#x\n", 62 "%s: head: %#x tail: %#x issued: %#x count: %#x\n",
64 __func__, ioat->head, ioat->tail, ioat->issued, ioat->dmacount); 63 __func__, ioat->head, ioat->tail, ioat->issued, ioat->dmacount);
65} 64}
66 65
67void ioat2_issue_pending(struct dma_chan *chan) 66void ioat2_issue_pending(struct dma_chan *c)
68{ 67{
69 struct ioat2_dma_chan *ioat = to_ioat2_chan(chan); 68 struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
70 69
71 spin_lock_bh(&ioat->ring_lock); 70 if (ioat2_ring_pending(ioat)) {
72 if (ioat->pending == 1) 71 spin_lock_bh(&ioat->ring_lock);
73 __ioat2_issue_pending(ioat); 72 __ioat2_issue_pending(ioat);
74 spin_unlock_bh(&ioat->ring_lock); 73 spin_unlock_bh(&ioat->ring_lock);
74 }
75} 75}
76 76
77/** 77/**
78 * ioat2_update_pending - log pending descriptors 78 * ioat2_update_pending - log pending descriptors
79 * @ioat: ioat2+ channel 79 * @ioat: ioat2+ channel
80 * 80 *
81 * set pending to '1' unless pending is already set to '2', pending == 2 81 * Check if the number of unsubmitted descriptors has exceeded the
82 * indicates that submission is temporarily blocked due to an in-flight 82 * watermark. Called with ring_lock held
83 * reset. If we are already above the ioat_pending_level threshold then
84 * just issue pending.
85 *
86 * called with ring_lock held
87 */ 83 */
88static void ioat2_update_pending(struct ioat2_dma_chan *ioat) 84static void ioat2_update_pending(struct ioat2_dma_chan *ioat)
89{ 85{
90 if (unlikely(ioat->pending == 2)) 86 if (ioat2_ring_pending(ioat) > ioat_pending_level)
91 return;
92 else if (ioat2_ring_pending(ioat) > ioat_pending_level)
93 __ioat2_issue_pending(ioat); 87 __ioat2_issue_pending(ioat);
94 else
95 ioat->pending = 1;
96} 88}
97 89
98static void __ioat2_start_null_desc(struct ioat2_dma_chan *ioat) 90static void __ioat2_start_null_desc(struct ioat2_dma_chan *ioat)
@@ -166,7 +158,7 @@ static void __cleanup(struct ioat2_dma_chan *ioat, unsigned long phys_complete)
166 seen_current = true; 158 seen_current = true;
167 } 159 }
168 ioat->tail += i; 160 ioat->tail += i;
169 BUG_ON(!seen_current); /* no active descs have written a completion? */ 161 BUG_ON(active && !seen_current); /* no active descs have written a completion? */
170 162
171 chan->last_completion = phys_complete; 163 chan->last_completion = phys_complete;
172 if (ioat->head == ioat->tail) { 164 if (ioat->head == ioat->tail) {
@@ -207,9 +199,9 @@ static void ioat2_cleanup(struct ioat2_dma_chan *ioat)
207 spin_unlock_bh(&chan->cleanup_lock); 199 spin_unlock_bh(&chan->cleanup_lock);
208} 200}
209 201
210void ioat2_cleanup_tasklet(unsigned long data) 202void ioat2_cleanup_event(unsigned long data)
211{ 203{
212 struct ioat2_dma_chan *ioat = (void *) data; 204 struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
213 205
214 ioat2_cleanup(ioat); 206 ioat2_cleanup(ioat);
215 writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET); 207 writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
@@ -291,7 +283,7 @@ static void ioat2_restart_channel(struct ioat2_dma_chan *ioat)
291 283
292void ioat2_timer_event(unsigned long data) 284void ioat2_timer_event(unsigned long data)
293{ 285{
294 struct ioat2_dma_chan *ioat = (void *) data; 286 struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
295 struct ioat_chan_common *chan = &ioat->base; 287 struct ioat_chan_common *chan = &ioat->base;
296 288
297 spin_lock_bh(&chan->cleanup_lock); 289 spin_lock_bh(&chan->cleanup_lock);
@@ -397,10 +389,7 @@ int ioat2_enumerate_channels(struct ioatdma_device *device)
397 if (!ioat) 389 if (!ioat)
398 break; 390 break;
399 391
400 ioat_init_channel(device, &ioat->base, i, 392 ioat_init_channel(device, &ioat->base, i);
401 device->timer_fn,
402 device->cleanup_tasklet,
403 (unsigned long) ioat);
404 ioat->xfercap_log = xfercap_log; 393 ioat->xfercap_log = xfercap_log;
405 spin_lock_init(&ioat->ring_lock); 394 spin_lock_init(&ioat->ring_lock);
406 if (device->reset_hw(&ioat->base)) { 395 if (device->reset_hw(&ioat->base)) {
@@ -546,7 +535,6 @@ int ioat2_alloc_chan_resources(struct dma_chan *c)
546 ioat->head = 0; 535 ioat->head = 0;
547 ioat->issued = 0; 536 ioat->issued = 0;
548 ioat->tail = 0; 537 ioat->tail = 0;
549 ioat->pending = 0;
550 ioat->alloc_order = order; 538 ioat->alloc_order = order;
551 spin_unlock_bh(&ioat->ring_lock); 539 spin_unlock_bh(&ioat->ring_lock);
552 540
@@ -701,7 +689,7 @@ int ioat2_alloc_and_lock(u16 *idx, struct ioat2_dma_chan *ioat, int num_descs)
701 689
702 mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); 690 mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
703 spin_unlock_bh(&chan->cleanup_lock); 691 spin_unlock_bh(&chan->cleanup_lock);
704 device->timer_fn((unsigned long) ioat); 692 device->timer_fn((unsigned long) &chan->common);
705 } else 693 } else
706 spin_unlock_bh(&chan->cleanup_lock); 694 spin_unlock_bh(&chan->cleanup_lock);
707 return -ENOMEM; 695 return -ENOMEM;
@@ -785,7 +773,7 @@ void ioat2_free_chan_resources(struct dma_chan *c)
785 773
786 tasklet_disable(&chan->cleanup_task); 774 tasklet_disable(&chan->cleanup_task);
787 del_timer_sync(&chan->timer); 775 del_timer_sync(&chan->timer);
788 device->cleanup_tasklet((unsigned long) ioat); 776 device->cleanup_fn((unsigned long) c);
789 device->reset_hw(chan); 777 device->reset_hw(chan);
790 778
791 spin_lock_bh(&ioat->ring_lock); 779 spin_lock_bh(&ioat->ring_lock);
@@ -815,25 +803,9 @@ void ioat2_free_chan_resources(struct dma_chan *c)
815 803
816 chan->last_completion = 0; 804 chan->last_completion = 0;
817 chan->completion_dma = 0; 805 chan->completion_dma = 0;
818 ioat->pending = 0;
819 ioat->dmacount = 0; 806 ioat->dmacount = 0;
820} 807}
821 808
822enum dma_status
823ioat2_is_complete(struct dma_chan *c, dma_cookie_t cookie,
824 dma_cookie_t *done, dma_cookie_t *used)
825{
826 struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
827 struct ioatdma_device *device = ioat->base.device;
828
829 if (ioat_is_complete(c, cookie, done, used) == DMA_SUCCESS)
830 return DMA_SUCCESS;
831
832 device->cleanup_tasklet((unsigned long) ioat);
833
834 return ioat_is_complete(c, cookie, done, used);
835}
836
837static ssize_t ring_size_show(struct dma_chan *c, char *page) 809static ssize_t ring_size_show(struct dma_chan *c, char *page)
838{ 810{
839 struct ioat2_dma_chan *ioat = to_ioat2_chan(c); 811 struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
@@ -874,7 +846,7 @@ int __devinit ioat2_dma_probe(struct ioatdma_device *device, int dca)
874 846
875 device->enumerate_channels = ioat2_enumerate_channels; 847 device->enumerate_channels = ioat2_enumerate_channels;
876 device->reset_hw = ioat2_reset_hw; 848 device->reset_hw = ioat2_reset_hw;
877 device->cleanup_tasklet = ioat2_cleanup_tasklet; 849 device->cleanup_fn = ioat2_cleanup_event;
878 device->timer_fn = ioat2_timer_event; 850 device->timer_fn = ioat2_timer_event;
879 device->self_test = ioat_dma_self_test; 851 device->self_test = ioat_dma_self_test;
880 dma = &device->common; 852 dma = &device->common;
@@ -882,7 +854,7 @@ int __devinit ioat2_dma_probe(struct ioatdma_device *device, int dca)
882 dma->device_issue_pending = ioat2_issue_pending; 854 dma->device_issue_pending = ioat2_issue_pending;
883 dma->device_alloc_chan_resources = ioat2_alloc_chan_resources; 855 dma->device_alloc_chan_resources = ioat2_alloc_chan_resources;
884 dma->device_free_chan_resources = ioat2_free_chan_resources; 856 dma->device_free_chan_resources = ioat2_free_chan_resources;
885 dma->device_is_tx_complete = ioat2_is_complete; 857 dma->device_is_tx_complete = ioat_is_dma_complete;
886 858
887 err = ioat_probe(device); 859 err = ioat_probe(device);
888 if (err) 860 if (err)
diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h
index 3afad8da43cc..ef2871fd7868 100644
--- a/drivers/dma/ioat/dma_v2.h
+++ b/drivers/dma/ioat/dma_v2.h
@@ -47,7 +47,6 @@ extern int ioat_ring_alloc_order;
47 * @head: allocated index 47 * @head: allocated index
48 * @issued: hardware notification point 48 * @issued: hardware notification point
49 * @tail: cleanup index 49 * @tail: cleanup index
50 * @pending: lock free indicator for issued != head
51 * @dmacount: identical to 'head' except for occasionally resetting to zero 50 * @dmacount: identical to 'head' except for occasionally resetting to zero
52 * @alloc_order: log2 of the number of allocated descriptors 51 * @alloc_order: log2 of the number of allocated descriptors
53 * @ring: software ring buffer implementation of hardware ring 52 * @ring: software ring buffer implementation of hardware ring
@@ -61,7 +60,6 @@ struct ioat2_dma_chan {
61 u16 tail; 60 u16 tail;
62 u16 dmacount; 61 u16 dmacount;
63 u16 alloc_order; 62 u16 alloc_order;
64 int pending;
65 struct ioat_ring_ent **ring; 63 struct ioat_ring_ent **ring;
66 spinlock_t ring_lock; 64 spinlock_t ring_lock;
67}; 65};
@@ -178,12 +176,10 @@ ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest,
178void ioat2_issue_pending(struct dma_chan *chan); 176void ioat2_issue_pending(struct dma_chan *chan);
179int ioat2_alloc_chan_resources(struct dma_chan *c); 177int ioat2_alloc_chan_resources(struct dma_chan *c);
180void ioat2_free_chan_resources(struct dma_chan *c); 178void ioat2_free_chan_resources(struct dma_chan *c);
181enum dma_status ioat2_is_complete(struct dma_chan *c, dma_cookie_t cookie,
182 dma_cookie_t *done, dma_cookie_t *used);
183void __ioat2_restart_chan(struct ioat2_dma_chan *ioat); 179void __ioat2_restart_chan(struct ioat2_dma_chan *ioat);
184bool reshape_ring(struct ioat2_dma_chan *ioat, int order); 180bool reshape_ring(struct ioat2_dma_chan *ioat, int order);
185void __ioat2_issue_pending(struct ioat2_dma_chan *ioat); 181void __ioat2_issue_pending(struct ioat2_dma_chan *ioat);
186void ioat2_cleanup_tasklet(unsigned long data); 182void ioat2_cleanup_event(unsigned long data);
187void ioat2_timer_event(unsigned long data); 183void ioat2_timer_event(unsigned long data);
188int ioat2_quiesce(struct ioat_chan_common *chan, unsigned long tmo); 184int ioat2_quiesce(struct ioat_chan_common *chan, unsigned long tmo);
189int ioat2_reset_sync(struct ioat_chan_common *chan, unsigned long tmo); 185int ioat2_reset_sync(struct ioat_chan_common *chan, unsigned long tmo);
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 9908c9e94b2d..26febc56dab1 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -293,17 +293,25 @@ static void __cleanup(struct ioat2_dma_chan *ioat, unsigned long phys_complete)
293 } 293 }
294 } 294 }
295 ioat->tail += i; 295 ioat->tail += i;
296 BUG_ON(!seen_current); /* no active descs have written a completion? */ 296 BUG_ON(active && !seen_current); /* no active descs have written a completion? */
297 chan->last_completion = phys_complete; 297 chan->last_completion = phys_complete;
298 if (ioat->head == ioat->tail) { 298
299 active = ioat2_ring_active(ioat);
300 if (active == 0) {
299 dev_dbg(to_dev(chan), "%s: cancel completion timeout\n", 301 dev_dbg(to_dev(chan), "%s: cancel completion timeout\n",
300 __func__); 302 __func__);
301 clear_bit(IOAT_COMPLETION_PENDING, &chan->state); 303 clear_bit(IOAT_COMPLETION_PENDING, &chan->state);
302 mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); 304 mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
303 } 305 }
306 /* 5 microsecond delay per pending descriptor */
307 writew(min((5 * active), IOAT_INTRDELAY_MASK),
308 chan->device->reg_base + IOAT_INTRDELAY_OFFSET);
304} 309}
305 310
306static void ioat3_cleanup(struct ioat2_dma_chan *ioat) 311/* try to cleanup, but yield (via spin_trylock) to incoming submissions
312 * with the expectation that we will immediately poll again shortly
313 */
314static void ioat3_cleanup_poll(struct ioat2_dma_chan *ioat)
307{ 315{
308 struct ioat_chan_common *chan = &ioat->base; 316 struct ioat_chan_common *chan = &ioat->base;
309 unsigned long phys_complete; 317 unsigned long phys_complete;
@@ -329,29 +337,41 @@ static void ioat3_cleanup(struct ioat2_dma_chan *ioat)
329 spin_unlock_bh(&chan->cleanup_lock); 337 spin_unlock_bh(&chan->cleanup_lock);
330} 338}
331 339
332static void ioat3_cleanup_tasklet(unsigned long data) 340/* run cleanup now because we already delayed the interrupt via INTRDELAY */
341static void ioat3_cleanup_sync(struct ioat2_dma_chan *ioat)
342{
343 struct ioat_chan_common *chan = &ioat->base;
344 unsigned long phys_complete;
345
346 prefetch(chan->completion);
347
348 spin_lock_bh(&chan->cleanup_lock);
349 if (!ioat_cleanup_preamble(chan, &phys_complete)) {
350 spin_unlock_bh(&chan->cleanup_lock);
351 return;
352 }
353 spin_lock_bh(&ioat->ring_lock);
354
355 __cleanup(ioat, phys_complete);
356
357 spin_unlock_bh(&ioat->ring_lock);
358 spin_unlock_bh(&chan->cleanup_lock);
359}
360
361static void ioat3_cleanup_event(unsigned long data)
333{ 362{
334 struct ioat2_dma_chan *ioat = (void *) data; 363 struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
335 364
336 ioat3_cleanup(ioat); 365 ioat3_cleanup_sync(ioat);
337 writew(IOAT_CHANCTRL_RUN | IOAT3_CHANCTRL_COMPL_DCA_EN, 366 writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
338 ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
339} 367}
340 368
341static void ioat3_restart_channel(struct ioat2_dma_chan *ioat) 369static void ioat3_restart_channel(struct ioat2_dma_chan *ioat)
342{ 370{
343 struct ioat_chan_common *chan = &ioat->base; 371 struct ioat_chan_common *chan = &ioat->base;
344 unsigned long phys_complete; 372 unsigned long phys_complete;
345 u32 status;
346
347 status = ioat_chansts(chan);
348 if (is_ioat_active(status) || is_ioat_idle(status))
349 ioat_suspend(chan);
350 while (is_ioat_active(status) || is_ioat_idle(status)) {
351 status = ioat_chansts(chan);
352 cpu_relax();
353 }
354 373
374 ioat2_quiesce(chan, 0);
355 if (ioat_cleanup_preamble(chan, &phys_complete)) 375 if (ioat_cleanup_preamble(chan, &phys_complete))
356 __cleanup(ioat, phys_complete); 376 __cleanup(ioat, phys_complete);
357 377
@@ -360,7 +380,7 @@ static void ioat3_restart_channel(struct ioat2_dma_chan *ioat)
360 380
361static void ioat3_timer_event(unsigned long data) 381static void ioat3_timer_event(unsigned long data)
362{ 382{
363 struct ioat2_dma_chan *ioat = (void *) data; 383 struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
364 struct ioat_chan_common *chan = &ioat->base; 384 struct ioat_chan_common *chan = &ioat->base;
365 385
366 spin_lock_bh(&chan->cleanup_lock); 386 spin_lock_bh(&chan->cleanup_lock);
@@ -426,7 +446,7 @@ ioat3_is_complete(struct dma_chan *c, dma_cookie_t cookie,
426 if (ioat_is_complete(c, cookie, done, used) == DMA_SUCCESS) 446 if (ioat_is_complete(c, cookie, done, used) == DMA_SUCCESS)
427 return DMA_SUCCESS; 447 return DMA_SUCCESS;
428 448
429 ioat3_cleanup(ioat); 449 ioat3_cleanup_poll(ioat);
430 450
431 return ioat_is_complete(c, cookie, done, used); 451 return ioat_is_complete(c, cookie, done, used);
432} 452}
@@ -1239,11 +1259,11 @@ int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
1239 1259
1240 if (is_raid_device) { 1260 if (is_raid_device) {
1241 dma->device_is_tx_complete = ioat3_is_complete; 1261 dma->device_is_tx_complete = ioat3_is_complete;
1242 device->cleanup_tasklet = ioat3_cleanup_tasklet; 1262 device->cleanup_fn = ioat3_cleanup_event;
1243 device->timer_fn = ioat3_timer_event; 1263 device->timer_fn = ioat3_timer_event;
1244 } else { 1264 } else {
1245 dma->device_is_tx_complete = ioat2_is_complete; 1265 dma->device_is_tx_complete = ioat_is_dma_complete;
1246 device->cleanup_tasklet = ioat2_cleanup_tasklet; 1266 device->cleanup_fn = ioat2_cleanup_event;
1247 device->timer_fn = ioat2_timer_event; 1267 device->timer_fn = ioat2_timer_event;
1248 } 1268 }
1249 1269
diff --git a/drivers/dma/ioat/registers.h b/drivers/dma/ioat/registers.h
index e8ae63baf588..1391798542b6 100644
--- a/drivers/dma/ioat/registers.h
+++ b/drivers/dma/ioat/registers.h
@@ -60,7 +60,7 @@
60#define IOAT_PERPORTOFFSET_OFFSET 0x0A /* 16-bit */ 60#define IOAT_PERPORTOFFSET_OFFSET 0x0A /* 16-bit */
61 61
62#define IOAT_INTRDELAY_OFFSET 0x0C /* 16-bit */ 62#define IOAT_INTRDELAY_OFFSET 0x0C /* 16-bit */
63#define IOAT_INTRDELAY_INT_DELAY_MASK 0x3FFF /* Interrupt Delay Time */ 63#define IOAT_INTRDELAY_MASK 0x3FFF /* Interrupt Delay Time */
64#define IOAT_INTRDELAY_COALESE_SUPPORT 0x8000 /* Interrupt Coalescing Supported */ 64#define IOAT_INTRDELAY_COALESE_SUPPORT 0x8000 /* Interrupt Coalescing Supported */
65 65
66#define IOAT_DEVICE_STATUS_OFFSET 0x0E /* 16-bit */ 66#define IOAT_DEVICE_STATUS_OFFSET 0x0E /* 16-bit */
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index e80bae1673fa..2a446397c884 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -348,6 +348,7 @@ static void ipu_ch_param_set_size(union chan_param_mem *params,
348 break; 348 break;
349 case IPU_PIX_FMT_BGRA32: 349 case IPU_PIX_FMT_BGRA32:
350 case IPU_PIX_FMT_BGR32: 350 case IPU_PIX_FMT_BGR32:
351 case IPU_PIX_FMT_ABGR32:
351 params->ip.bpp = 0; 352 params->ip.bpp = 0;
352 params->ip.pfs = 4; 353 params->ip.pfs = 4;
353 params->ip.npb = 7; 354 params->ip.npb = 7;
@@ -376,20 +377,6 @@ static void ipu_ch_param_set_size(union chan_param_mem *params,
376 params->ip.wid2 = 7; /* Blue bit width - 1 */ 377 params->ip.wid2 = 7; /* Blue bit width - 1 */
377 params->ip.wid3 = 7; /* Alpha bit width - 1 */ 378 params->ip.wid3 = 7; /* Alpha bit width - 1 */
378 break; 379 break;
379 case IPU_PIX_FMT_ABGR32:
380 params->ip.bpp = 0;
381 params->ip.pfs = 4;
382 params->ip.npb = 7;
383 params->ip.sat = 2; /* SAT = 32-bit access */
384 params->ip.ofs0 = 8; /* Red bit offset */
385 params->ip.ofs1 = 16; /* Green bit offset */
386 params->ip.ofs2 = 24; /* Blue bit offset */
387 params->ip.ofs3 = 0; /* Alpha bit offset */
388 params->ip.wid0 = 7; /* Red bit width - 1 */
389 params->ip.wid1 = 7; /* Green bit width - 1 */
390 params->ip.wid2 = 7; /* Blue bit width - 1 */
391 params->ip.wid3 = 7; /* Alpha bit width - 1 */
392 break;
393 case IPU_PIX_FMT_UYVY: 380 case IPU_PIX_FMT_UYVY:
394 params->ip.bpp = 2; 381 params->ip.bpp = 2;
395 params->ip.pfs = 6; 382 params->ip.pfs = 6;
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
new file mode 100644
index 000000000000..3fdf1f46bd63
--- /dev/null
+++ b/drivers/dma/mpc512x_dma.c
@@ -0,0 +1,800 @@
1/*
2 * Copyright (C) Freescale Semicondutor, Inc. 2007, 2008.
3 * Copyright (C) Semihalf 2009
4 *
5 * Written by Piotr Ziecik <kosmo@semihalf.com>. Hardware description
6 * (defines, structures and comments) was taken from MPC5121 DMA driver
7 * written by Hongjun Chen <hong-jun.chen@freescale.com>.
8 *
9 * Approved as OSADL project by a majority of OSADL members and funded
10 * by OSADL membership fees in 2009; for details see www.osadl.org.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
20 * more details.
21 *
22 * You should have received a copy of the GNU General Public License along with
23 * this program; if not, write to the Free Software Foundation, Inc., 59
24 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 *
26 * The full GNU General Public License is included in this distribution in the
27 * file called COPYING.
28 */
29
30/*
31 * This is initial version of MPC5121 DMA driver. Only memory to memory
32 * transfers are supported (tested using dmatest module).
33 */
34
35#include <linux/module.h>
36#include <linux/dmaengine.h>
37#include <linux/dma-mapping.h>
38#include <linux/interrupt.h>
39#include <linux/io.h>
40#include <linux/of_device.h>
41#include <linux/of_platform.h>
42
43#include <linux/random.h>
44
45/* Number of DMA Transfer descriptors allocated per channel */
46#define MPC_DMA_DESCRIPTORS 64
47
48/* Macro definitions */
49#define MPC_DMA_CHANNELS 64
50#define MPC_DMA_TCD_OFFSET 0x1000
51
52/* Arbitration mode of group and channel */
53#define MPC_DMA_DMACR_EDCG (1 << 31)
54#define MPC_DMA_DMACR_ERGA (1 << 3)
55#define MPC_DMA_DMACR_ERCA (1 << 2)
56
57/* Error codes */
58#define MPC_DMA_DMAES_VLD (1 << 31)
59#define MPC_DMA_DMAES_GPE (1 << 15)
60#define MPC_DMA_DMAES_CPE (1 << 14)
61#define MPC_DMA_DMAES_ERRCHN(err) \
62 (((err) >> 8) & 0x3f)
63#define MPC_DMA_DMAES_SAE (1 << 7)
64#define MPC_DMA_DMAES_SOE (1 << 6)
65#define MPC_DMA_DMAES_DAE (1 << 5)
66#define MPC_DMA_DMAES_DOE (1 << 4)
67#define MPC_DMA_DMAES_NCE (1 << 3)
68#define MPC_DMA_DMAES_SGE (1 << 2)
69#define MPC_DMA_DMAES_SBE (1 << 1)
70#define MPC_DMA_DMAES_DBE (1 << 0)
71
72#define MPC_DMA_TSIZE_1 0x00
73#define MPC_DMA_TSIZE_2 0x01
74#define MPC_DMA_TSIZE_4 0x02
75#define MPC_DMA_TSIZE_16 0x04
76#define MPC_DMA_TSIZE_32 0x05
77
78/* MPC5121 DMA engine registers */
79struct __attribute__ ((__packed__)) mpc_dma_regs {
80 /* 0x00 */
81 u32 dmacr; /* DMA control register */
82 u32 dmaes; /* DMA error status */
83 /* 0x08 */
84 u32 dmaerqh; /* DMA enable request high(channels 63~32) */
85 u32 dmaerql; /* DMA enable request low(channels 31~0) */
86 u32 dmaeeih; /* DMA enable error interrupt high(ch63~32) */
87 u32 dmaeeil; /* DMA enable error interrupt low(ch31~0) */
88 /* 0x18 */
89 u8 dmaserq; /* DMA set enable request */
90 u8 dmacerq; /* DMA clear enable request */
91 u8 dmaseei; /* DMA set enable error interrupt */
92 u8 dmaceei; /* DMA clear enable error interrupt */
93 /* 0x1c */
94 u8 dmacint; /* DMA clear interrupt request */
95 u8 dmacerr; /* DMA clear error */
96 u8 dmassrt; /* DMA set start bit */
97 u8 dmacdne; /* DMA clear DONE status bit */
98 /* 0x20 */
99 u32 dmainth; /* DMA interrupt request high(ch63~32) */
100 u32 dmaintl; /* DMA interrupt request low(ch31~0) */
101 u32 dmaerrh; /* DMA error high(ch63~32) */
102 u32 dmaerrl; /* DMA error low(ch31~0) */
103 /* 0x30 */
104 u32 dmahrsh; /* DMA hw request status high(ch63~32) */
105 u32 dmahrsl; /* DMA hardware request status low(ch31~0) */
106 u32 dmaihsa; /* DMA interrupt high select AXE(ch63~32) */
107 u32 dmailsa; /* DMA interrupt low select AXE(ch31~0) */
108 /* 0x40 ~ 0xff */
109 u32 reserve0[48]; /* Reserved */
110 /* 0x100 */
111 u8 dchpri[MPC_DMA_CHANNELS];
112 /* DMA channels(0~63) priority */
113};
114
115struct __attribute__ ((__packed__)) mpc_dma_tcd {
116 /* 0x00 */
117 u32 saddr; /* Source address */
118
119 u32 smod:5; /* Source address modulo */
120 u32 ssize:3; /* Source data transfer size */
121 u32 dmod:5; /* Destination address modulo */
122 u32 dsize:3; /* Destination data transfer size */
123 u32 soff:16; /* Signed source address offset */
124
125 /* 0x08 */
126 u32 nbytes; /* Inner "minor" byte count */
127 u32 slast; /* Last source address adjustment */
128 u32 daddr; /* Destination address */
129
130 /* 0x14 */
131 u32 citer_elink:1; /* Enable channel-to-channel linking on
132 * minor loop complete
133 */
134 u32 citer_linkch:6; /* Link channel for minor loop complete */
135 u32 citer:9; /* Current "major" iteration count */
136 u32 doff:16; /* Signed destination address offset */
137
138 /* 0x18 */
139 u32 dlast_sga; /* Last Destination address adjustment/scatter
140 * gather address
141 */
142
143 /* 0x1c */
144 u32 biter_elink:1; /* Enable channel-to-channel linking on major
145 * loop complete
146 */
147 u32 biter_linkch:6;
148 u32 biter:9; /* Beginning "major" iteration count */
149 u32 bwc:2; /* Bandwidth control */
150 u32 major_linkch:6; /* Link channel number */
151 u32 done:1; /* Channel done */
152 u32 active:1; /* Channel active */
153 u32 major_elink:1; /* Enable channel-to-channel linking on major
154 * loop complete
155 */
156 u32 e_sg:1; /* Enable scatter/gather processing */
157 u32 d_req:1; /* Disable request */
158 u32 int_half:1; /* Enable an interrupt when major counter is
159 * half complete
160 */
161 u32 int_maj:1; /* Enable an interrupt when major iteration
162 * count completes
163 */
164 u32 start:1; /* Channel start */
165};
166
167struct mpc_dma_desc {
168 struct dma_async_tx_descriptor desc;
169 struct mpc_dma_tcd *tcd;
170 dma_addr_t tcd_paddr;
171 int error;
172 struct list_head node;
173};
174
175struct mpc_dma_chan {
176 struct dma_chan chan;
177 struct list_head free;
178 struct list_head prepared;
179 struct list_head queued;
180 struct list_head active;
181 struct list_head completed;
182 struct mpc_dma_tcd *tcd;
183 dma_addr_t tcd_paddr;
184 dma_cookie_t completed_cookie;
185
186 /* Lock for this structure */
187 spinlock_t lock;
188};
189
190struct mpc_dma {
191 struct dma_device dma;
192 struct tasklet_struct tasklet;
193 struct mpc_dma_chan channels[MPC_DMA_CHANNELS];
194 struct mpc_dma_regs __iomem *regs;
195 struct mpc_dma_tcd __iomem *tcd;
196 int irq;
197 uint error_status;
198
199 /* Lock for error_status field in this structure */
200 spinlock_t error_status_lock;
201};
202
203#define DRV_NAME "mpc512x_dma"
204
205/* Convert struct dma_chan to struct mpc_dma_chan */
206static inline struct mpc_dma_chan *dma_chan_to_mpc_dma_chan(struct dma_chan *c)
207{
208 return container_of(c, struct mpc_dma_chan, chan);
209}
210
211/* Convert struct dma_chan to struct mpc_dma */
212static inline struct mpc_dma *dma_chan_to_mpc_dma(struct dma_chan *c)
213{
214 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(c);
215 return container_of(mchan, struct mpc_dma, channels[c->chan_id]);
216}
217
218/*
219 * Execute all queued DMA descriptors.
220 *
221 * Following requirements must be met while calling mpc_dma_execute():
222 * a) mchan->lock is acquired,
223 * b) mchan->active list is empty,
224 * c) mchan->queued list contains at least one entry.
225 */
226static void mpc_dma_execute(struct mpc_dma_chan *mchan)
227{
228 struct mpc_dma *mdma = dma_chan_to_mpc_dma(&mchan->chan);
229 struct mpc_dma_desc *first = NULL;
230 struct mpc_dma_desc *prev = NULL;
231 struct mpc_dma_desc *mdesc;
232 int cid = mchan->chan.chan_id;
233
234 /* Move all queued descriptors to active list */
235 list_splice_tail_init(&mchan->queued, &mchan->active);
236
237 /* Chain descriptors into one transaction */
238 list_for_each_entry(mdesc, &mchan->active, node) {
239 if (!first)
240 first = mdesc;
241
242 if (!prev) {
243 prev = mdesc;
244 continue;
245 }
246
247 prev->tcd->dlast_sga = mdesc->tcd_paddr;
248 prev->tcd->e_sg = 1;
249 mdesc->tcd->start = 1;
250
251 prev = mdesc;
252 }
253
254 prev->tcd->start = 0;
255 prev->tcd->int_maj = 1;
256
257 /* Send first descriptor in chain into hardware */
258 memcpy_toio(&mdma->tcd[cid], first->tcd, sizeof(struct mpc_dma_tcd));
259 out_8(&mdma->regs->dmassrt, cid);
260}
261
262/* Handle interrupt on one half of DMA controller (32 channels) */
263static void mpc_dma_irq_process(struct mpc_dma *mdma, u32 is, u32 es, int off)
264{
265 struct mpc_dma_chan *mchan;
266 struct mpc_dma_desc *mdesc;
267 u32 status = is | es;
268 int ch;
269
270 while ((ch = fls(status) - 1) >= 0) {
271 status &= ~(1 << ch);
272 mchan = &mdma->channels[ch + off];
273
274 spin_lock(&mchan->lock);
275
276 /* Check error status */
277 if (es & (1 << ch))
278 list_for_each_entry(mdesc, &mchan->active, node)
279 mdesc->error = -EIO;
280
281 /* Execute queued descriptors */
282 list_splice_tail_init(&mchan->active, &mchan->completed);
283 if (!list_empty(&mchan->queued))
284 mpc_dma_execute(mchan);
285
286 spin_unlock(&mchan->lock);
287 }
288}
289
290/* Interrupt handler */
291static irqreturn_t mpc_dma_irq(int irq, void *data)
292{
293 struct mpc_dma *mdma = data;
294 uint es;
295
296 /* Save error status register */
297 es = in_be32(&mdma->regs->dmaes);
298 spin_lock(&mdma->error_status_lock);
299 if ((es & MPC_DMA_DMAES_VLD) && mdma->error_status == 0)
300 mdma->error_status = es;
301 spin_unlock(&mdma->error_status_lock);
302
303 /* Handle interrupt on each channel */
304 mpc_dma_irq_process(mdma, in_be32(&mdma->regs->dmainth),
305 in_be32(&mdma->regs->dmaerrh), 32);
306 mpc_dma_irq_process(mdma, in_be32(&mdma->regs->dmaintl),
307 in_be32(&mdma->regs->dmaerrl), 0);
308
309 /* Ack interrupt on all channels */
310 out_be32(&mdma->regs->dmainth, 0xFFFFFFFF);
311 out_be32(&mdma->regs->dmaintl, 0xFFFFFFFF);
312 out_be32(&mdma->regs->dmaerrh, 0xFFFFFFFF);
313 out_be32(&mdma->regs->dmaerrl, 0xFFFFFFFF);
314
315 /* Schedule tasklet */
316 tasklet_schedule(&mdma->tasklet);
317
318 return IRQ_HANDLED;
319}
320
321/* DMA Tasklet */
322static void mpc_dma_tasklet(unsigned long data)
323{
324 struct mpc_dma *mdma = (void *)data;
325 dma_cookie_t last_cookie = 0;
326 struct mpc_dma_chan *mchan;
327 struct mpc_dma_desc *mdesc;
328 struct dma_async_tx_descriptor *desc;
329 unsigned long flags;
330 LIST_HEAD(list);
331 uint es;
332 int i;
333
334 spin_lock_irqsave(&mdma->error_status_lock, flags);
335 es = mdma->error_status;
336 mdma->error_status = 0;
337 spin_unlock_irqrestore(&mdma->error_status_lock, flags);
338
339 /* Print nice error report */
340 if (es) {
341 dev_err(mdma->dma.dev,
342 "Hardware reported following error(s) on channel %u:\n",
343 MPC_DMA_DMAES_ERRCHN(es));
344
345 if (es & MPC_DMA_DMAES_GPE)
346 dev_err(mdma->dma.dev, "- Group Priority Error\n");
347 if (es & MPC_DMA_DMAES_CPE)
348 dev_err(mdma->dma.dev, "- Channel Priority Error\n");
349 if (es & MPC_DMA_DMAES_SAE)
350 dev_err(mdma->dma.dev, "- Source Address Error\n");
351 if (es & MPC_DMA_DMAES_SOE)
352 dev_err(mdma->dma.dev, "- Source Offset"
353 " Configuration Error\n");
354 if (es & MPC_DMA_DMAES_DAE)
355 dev_err(mdma->dma.dev, "- Destination Address"
356 " Error\n");
357 if (es & MPC_DMA_DMAES_DOE)
358 dev_err(mdma->dma.dev, "- Destination Offset"
359 " Configuration Error\n");
360 if (es & MPC_DMA_DMAES_NCE)
361 dev_err(mdma->dma.dev, "- NBytes/Citter"
362 " Configuration Error\n");
363 if (es & MPC_DMA_DMAES_SGE)
364 dev_err(mdma->dma.dev, "- Scatter/Gather"
365 " Configuration Error\n");
366 if (es & MPC_DMA_DMAES_SBE)
367 dev_err(mdma->dma.dev, "- Source Bus Error\n");
368 if (es & MPC_DMA_DMAES_DBE)
369 dev_err(mdma->dma.dev, "- Destination Bus Error\n");
370 }
371
372 for (i = 0; i < mdma->dma.chancnt; i++) {
373 mchan = &mdma->channels[i];
374
375 /* Get all completed descriptors */
376 spin_lock_irqsave(&mchan->lock, flags);
377 if (!list_empty(&mchan->completed))
378 list_splice_tail_init(&mchan->completed, &list);
379 spin_unlock_irqrestore(&mchan->lock, flags);
380
381 if (list_empty(&list))
382 continue;
383
384 /* Execute callbacks and run dependencies */
385 list_for_each_entry(mdesc, &list, node) {
386 desc = &mdesc->desc;
387
388 if (desc->callback)
389 desc->callback(desc->callback_param);
390
391 last_cookie = desc->cookie;
392 dma_run_dependencies(desc);
393 }
394
395 /* Free descriptors */
396 spin_lock_irqsave(&mchan->lock, flags);
397 list_splice_tail_init(&list, &mchan->free);
398 mchan->completed_cookie = last_cookie;
399 spin_unlock_irqrestore(&mchan->lock, flags);
400 }
401}
402
403/* Submit descriptor to hardware */
404static dma_cookie_t mpc_dma_tx_submit(struct dma_async_tx_descriptor *txd)
405{
406 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(txd->chan);
407 struct mpc_dma_desc *mdesc;
408 unsigned long flags;
409 dma_cookie_t cookie;
410
411 mdesc = container_of(txd, struct mpc_dma_desc, desc);
412
413 spin_lock_irqsave(&mchan->lock, flags);
414
415 /* Move descriptor to queue */
416 list_move_tail(&mdesc->node, &mchan->queued);
417
418 /* If channel is idle, execute all queued descriptors */
419 if (list_empty(&mchan->active))
420 mpc_dma_execute(mchan);
421
422 /* Update cookie */
423 cookie = mchan->chan.cookie + 1;
424 if (cookie <= 0)
425 cookie = 1;
426
427 mchan->chan.cookie = cookie;
428 mdesc->desc.cookie = cookie;
429
430 spin_unlock_irqrestore(&mchan->lock, flags);
431
432 return cookie;
433}
434
435/* Alloc channel resources */
436static int mpc_dma_alloc_chan_resources(struct dma_chan *chan)
437{
438 struct mpc_dma *mdma = dma_chan_to_mpc_dma(chan);
439 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
440 struct mpc_dma_desc *mdesc;
441 struct mpc_dma_tcd *tcd;
442 dma_addr_t tcd_paddr;
443 unsigned long flags;
444 LIST_HEAD(descs);
445 int i;
446
447 /* Alloc DMA memory for Transfer Control Descriptors */
448 tcd = dma_alloc_coherent(mdma->dma.dev,
449 MPC_DMA_DESCRIPTORS * sizeof(struct mpc_dma_tcd),
450 &tcd_paddr, GFP_KERNEL);
451 if (!tcd)
452 return -ENOMEM;
453
454 /* Alloc descriptors for this channel */
455 for (i = 0; i < MPC_DMA_DESCRIPTORS; i++) {
456 mdesc = kzalloc(sizeof(struct mpc_dma_desc), GFP_KERNEL);
457 if (!mdesc) {
458 dev_notice(mdma->dma.dev, "Memory allocation error. "
459 "Allocated only %u descriptors\n", i);
460 break;
461 }
462
463 dma_async_tx_descriptor_init(&mdesc->desc, chan);
464 mdesc->desc.flags = DMA_CTRL_ACK;
465 mdesc->desc.tx_submit = mpc_dma_tx_submit;
466
467 mdesc->tcd = &tcd[i];
468 mdesc->tcd_paddr = tcd_paddr + (i * sizeof(struct mpc_dma_tcd));
469
470 list_add_tail(&mdesc->node, &descs);
471 }
472
473 /* Return error only if no descriptors were allocated */
474 if (i == 0) {
475 dma_free_coherent(mdma->dma.dev,
476 MPC_DMA_DESCRIPTORS * sizeof(struct mpc_dma_tcd),
477 tcd, tcd_paddr);
478 return -ENOMEM;
479 }
480
481 spin_lock_irqsave(&mchan->lock, flags);
482 mchan->tcd = tcd;
483 mchan->tcd_paddr = tcd_paddr;
484 list_splice_tail_init(&descs, &mchan->free);
485 spin_unlock_irqrestore(&mchan->lock, flags);
486
487 /* Enable Error Interrupt */
488 out_8(&mdma->regs->dmaseei, chan->chan_id);
489
490 return 0;
491}
492
493/* Free channel resources */
494static void mpc_dma_free_chan_resources(struct dma_chan *chan)
495{
496 struct mpc_dma *mdma = dma_chan_to_mpc_dma(chan);
497 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
498 struct mpc_dma_desc *mdesc, *tmp;
499 struct mpc_dma_tcd *tcd;
500 dma_addr_t tcd_paddr;
501 unsigned long flags;
502 LIST_HEAD(descs);
503
504 spin_lock_irqsave(&mchan->lock, flags);
505
506 /* Channel must be idle */
507 BUG_ON(!list_empty(&mchan->prepared));
508 BUG_ON(!list_empty(&mchan->queued));
509 BUG_ON(!list_empty(&mchan->active));
510 BUG_ON(!list_empty(&mchan->completed));
511
512 /* Move data */
513 list_splice_tail_init(&mchan->free, &descs);
514 tcd = mchan->tcd;
515 tcd_paddr = mchan->tcd_paddr;
516
517 spin_unlock_irqrestore(&mchan->lock, flags);
518
519 /* Free DMA memory used by descriptors */
520 dma_free_coherent(mdma->dma.dev,
521 MPC_DMA_DESCRIPTORS * sizeof(struct mpc_dma_tcd),
522 tcd, tcd_paddr);
523
524 /* Free descriptors */
525 list_for_each_entry_safe(mdesc, tmp, &descs, node)
526 kfree(mdesc);
527
528 /* Disable Error Interrupt */
529 out_8(&mdma->regs->dmaceei, chan->chan_id);
530}
531
532/* Send all pending descriptor to hardware */
533static void mpc_dma_issue_pending(struct dma_chan *chan)
534{
535 /*
536 * We are posting descriptors to the hardware as soon as
537 * they are ready, so this function does nothing.
538 */
539}
540
541/* Check request completion status */
542static enum dma_status
543mpc_dma_is_tx_complete(struct dma_chan *chan, dma_cookie_t cookie,
544 dma_cookie_t *done, dma_cookie_t *used)
545{
546 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
547 unsigned long flags;
548 dma_cookie_t last_used;
549 dma_cookie_t last_complete;
550
551 spin_lock_irqsave(&mchan->lock, flags);
552 last_used = mchan->chan.cookie;
553 last_complete = mchan->completed_cookie;
554 spin_unlock_irqrestore(&mchan->lock, flags);
555
556 if (done)
557 *done = last_complete;
558
559 if (used)
560 *used = last_used;
561
562 return dma_async_is_complete(cookie, last_complete, last_used);
563}
564
565/* Prepare descriptor for memory to memory copy */
566static struct dma_async_tx_descriptor *
567mpc_dma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst, dma_addr_t src,
568 size_t len, unsigned long flags)
569{
570 struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
571 struct mpc_dma_desc *mdesc = NULL;
572 struct mpc_dma_tcd *tcd;
573 unsigned long iflags;
574
575 /* Get free descriptor */
576 spin_lock_irqsave(&mchan->lock, iflags);
577 if (!list_empty(&mchan->free)) {
578 mdesc = list_first_entry(&mchan->free, struct mpc_dma_desc,
579 node);
580 list_del(&mdesc->node);
581 }
582 spin_unlock_irqrestore(&mchan->lock, iflags);
583
584 if (!mdesc)
585 return NULL;
586
587 mdesc->error = 0;
588 tcd = mdesc->tcd;
589
590 /* Prepare Transfer Control Descriptor for this transaction */
591 memset(tcd, 0, sizeof(struct mpc_dma_tcd));
592
593 if (IS_ALIGNED(src | dst | len, 32)) {
594 tcd->ssize = MPC_DMA_TSIZE_32;
595 tcd->dsize = MPC_DMA_TSIZE_32;
596 tcd->soff = 32;
597 tcd->doff = 32;
598 } else if (IS_ALIGNED(src | dst | len, 16)) {
599 tcd->ssize = MPC_DMA_TSIZE_16;
600 tcd->dsize = MPC_DMA_TSIZE_16;
601 tcd->soff = 16;
602 tcd->doff = 16;
603 } else if (IS_ALIGNED(src | dst | len, 4)) {
604 tcd->ssize = MPC_DMA_TSIZE_4;
605 tcd->dsize = MPC_DMA_TSIZE_4;
606 tcd->soff = 4;
607 tcd->doff = 4;
608 } else if (IS_ALIGNED(src | dst | len, 2)) {
609 tcd->ssize = MPC_DMA_TSIZE_2;
610 tcd->dsize = MPC_DMA_TSIZE_2;
611 tcd->soff = 2;
612 tcd->doff = 2;
613 } else {
614 tcd->ssize = MPC_DMA_TSIZE_1;
615 tcd->dsize = MPC_DMA_TSIZE_1;
616 tcd->soff = 1;
617 tcd->doff = 1;
618 }
619
620 tcd->saddr = src;
621 tcd->daddr = dst;
622 tcd->nbytes = len;
623 tcd->biter = 1;
624 tcd->citer = 1;
625
626 /* Place descriptor in prepared list */
627 spin_lock_irqsave(&mchan->lock, iflags);
628 list_add_tail(&mdesc->node, &mchan->prepared);
629 spin_unlock_irqrestore(&mchan->lock, iflags);
630
631 return &mdesc->desc;
632}
633
634static int __devinit mpc_dma_probe(struct of_device *op,
635 const struct of_device_id *match)
636{
637 struct device_node *dn = op->node;
638 struct device *dev = &op->dev;
639 struct dma_device *dma;
640 struct mpc_dma *mdma;
641 struct mpc_dma_chan *mchan;
642 struct resource res;
643 ulong regs_start, regs_size;
644 int retval, i;
645
646 mdma = devm_kzalloc(dev, sizeof(struct mpc_dma), GFP_KERNEL);
647 if (!mdma) {
648 dev_err(dev, "Memory exhausted!\n");
649 return -ENOMEM;
650 }
651
652 mdma->irq = irq_of_parse_and_map(dn, 0);
653 if (mdma->irq == NO_IRQ) {
654 dev_err(dev, "Error mapping IRQ!\n");
655 return -EINVAL;
656 }
657
658 retval = of_address_to_resource(dn, 0, &res);
659 if (retval) {
660 dev_err(dev, "Error parsing memory region!\n");
661 return retval;
662 }
663
664 regs_start = res.start;
665 regs_size = res.end - res.start + 1;
666
667 if (!devm_request_mem_region(dev, regs_start, regs_size, DRV_NAME)) {
668 dev_err(dev, "Error requesting memory region!\n");
669 return -EBUSY;
670 }
671
672 mdma->regs = devm_ioremap(dev, regs_start, regs_size);
673 if (!mdma->regs) {
674 dev_err(dev, "Error mapping memory region!\n");
675 return -ENOMEM;
676 }
677
678 mdma->tcd = (struct mpc_dma_tcd *)((u8 *)(mdma->regs)
679 + MPC_DMA_TCD_OFFSET);
680
681 retval = devm_request_irq(dev, mdma->irq, &mpc_dma_irq, 0, DRV_NAME,
682 mdma);
683 if (retval) {
684 dev_err(dev, "Error requesting IRQ!\n");
685 return -EINVAL;
686 }
687
688 spin_lock_init(&mdma->error_status_lock);
689
690 dma = &mdma->dma;
691 dma->dev = dev;
692 dma->chancnt = MPC_DMA_CHANNELS;
693 dma->device_alloc_chan_resources = mpc_dma_alloc_chan_resources;
694 dma->device_free_chan_resources = mpc_dma_free_chan_resources;
695 dma->device_issue_pending = mpc_dma_issue_pending;
696 dma->device_is_tx_complete = mpc_dma_is_tx_complete;
697 dma->device_prep_dma_memcpy = mpc_dma_prep_memcpy;
698
699 INIT_LIST_HEAD(&dma->channels);
700 dma_cap_set(DMA_MEMCPY, dma->cap_mask);
701
702 for (i = 0; i < dma->chancnt; i++) {
703 mchan = &mdma->channels[i];
704
705 mchan->chan.device = dma;
706 mchan->chan.chan_id = i;
707 mchan->chan.cookie = 1;
708 mchan->completed_cookie = mchan->chan.cookie;
709
710 INIT_LIST_HEAD(&mchan->free);
711 INIT_LIST_HEAD(&mchan->prepared);
712 INIT_LIST_HEAD(&mchan->queued);
713 INIT_LIST_HEAD(&mchan->active);
714 INIT_LIST_HEAD(&mchan->completed);
715
716 spin_lock_init(&mchan->lock);
717 list_add_tail(&mchan->chan.device_node, &dma->channels);
718 }
719
720 tasklet_init(&mdma->tasklet, mpc_dma_tasklet, (unsigned long)mdma);
721
722 /*
723 * Configure DMA Engine:
724 * - Dynamic clock,
725 * - Round-robin group arbitration,
726 * - Round-robin channel arbitration.
727 */
728 out_be32(&mdma->regs->dmacr, MPC_DMA_DMACR_EDCG |
729 MPC_DMA_DMACR_ERGA | MPC_DMA_DMACR_ERCA);
730
731 /* Disable hardware DMA requests */
732 out_be32(&mdma->regs->dmaerqh, 0);
733 out_be32(&mdma->regs->dmaerql, 0);
734
735 /* Disable error interrupts */
736 out_be32(&mdma->regs->dmaeeih, 0);
737 out_be32(&mdma->regs->dmaeeil, 0);
738
739 /* Clear interrupts status */
740 out_be32(&mdma->regs->dmainth, 0xFFFFFFFF);
741 out_be32(&mdma->regs->dmaintl, 0xFFFFFFFF);
742 out_be32(&mdma->regs->dmaerrh, 0xFFFFFFFF);
743 out_be32(&mdma->regs->dmaerrl, 0xFFFFFFFF);
744
745 /* Route interrupts to IPIC */
746 out_be32(&mdma->regs->dmaihsa, 0);
747 out_be32(&mdma->regs->dmailsa, 0);
748
749 /* Register DMA engine */
750 dev_set_drvdata(dev, mdma);
751 retval = dma_async_device_register(dma);
752 if (retval) {
753 devm_free_irq(dev, mdma->irq, mdma);
754 irq_dispose_mapping(mdma->irq);
755 }
756
757 return retval;
758}
759
760static int __devexit mpc_dma_remove(struct of_device *op)
761{
762 struct device *dev = &op->dev;
763 struct mpc_dma *mdma = dev_get_drvdata(dev);
764
765 dma_async_device_unregister(&mdma->dma);
766 devm_free_irq(dev, mdma->irq, mdma);
767 irq_dispose_mapping(mdma->irq);
768
769 return 0;
770}
771
772static struct of_device_id mpc_dma_match[] = {
773 { .compatible = "fsl,mpc5121-dma", },
774 {},
775};
776
777static struct of_platform_driver mpc_dma_driver = {
778 .match_table = mpc_dma_match,
779 .probe = mpc_dma_probe,
780 .remove = __devexit_p(mpc_dma_remove),
781 .driver = {
782 .name = DRV_NAME,
783 .owner = THIS_MODULE,
784 },
785};
786
787static int __init mpc_dma_init(void)
788{
789 return of_register_platform_driver(&mpc_dma_driver);
790}
791module_init(mpc_dma_init);
792
793static void __exit mpc_dma_exit(void)
794{
795 of_unregister_platform_driver(&mpc_dma_driver);
796}
797module_exit(mpc_dma_exit);
798
799MODULE_LICENSE("GPL");
800MODULE_AUTHOR("Piotr Ziecik <kosmo@semihalf.com>");
diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index 0a3478e910f0..e69d87f24a25 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -4940,7 +4940,7 @@ out_free:
4940 return ret; 4940 return ret;
4941} 4941}
4942 4942
4943static struct of_device_id __devinitdata ppc440spe_adma_of_match[] = { 4943static const struct of_device_id ppc440spe_adma_of_match[] __devinitconst = {
4944 { .compatible = "ibm,dma-440spe", }, 4944 { .compatible = "ibm,dma-440spe", },
4945 { .compatible = "amcc,xor-accelerator", }, 4945 { .compatible = "amcc,xor-accelerator", },
4946 {}, 4946 {},
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-24 16:37:05 -0400