atm: [he] remove small buffer allocation/handling code

Signed-off-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 131 deletions

diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index 56c2e99e458f..c725494e0d41 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -780,59 +780,18 @@ he_init_group(struct he_dev *he_dev, int group)
 {
         int i;
 
-        /* small buffer pool */
-        he_dev->rbps_pool = pci_pool_create("rbps", he_dev->pci_dev,
-                        CONFIG_RBPS_BUFSIZE, 8, 0);
-        if (he_dev->rbps_pool == NULL) {
-                hprintk("unable to create rbps pages\n");
-                return -ENOMEM;
-        }
-
-        he_dev->rbps_base = pci_alloc_consistent(he_dev->pci_dev,
-                CONFIG_RBPS_SIZE * sizeof(struct he_rbp), &he_dev->rbps_phys);
-        if (he_dev->rbps_base == NULL) {
-                hprintk("failed to alloc rbps_base\n");
-                goto out_destroy_rbps_pool;
-        }
-        memset(he_dev->rbps_base, 0, CONFIG_RBPS_SIZE * sizeof(struct he_rbp));
-        he_dev->rbps_virt = kmalloc(CONFIG_RBPS_SIZE * sizeof(struct he_virt), GFP_KERNEL);
-        if (he_dev->rbps_virt == NULL) {
-                hprintk("failed to alloc rbps_virt\n");
-                goto out_free_rbps_base;
-        }
-
-        for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
-                dma_addr_t dma_handle;
-                void *cpuaddr;
-
-                cpuaddr = pci_pool_alloc(he_dev->rbps_pool, GFP_KERNEL|GFP_DMA, &dma_handle);
-                if (cpuaddr == NULL)
-                        goto out_free_rbps_virt;
-
-                he_dev->rbps_virt[i].virt = cpuaddr;
-                he_dev->rbps_base[i].status = RBP_LOANED | RBP_SMALLBUF | (i << RBP_INDEX_OFF);
-                he_dev->rbps_base[i].phys = dma_handle;
-
-        }
-        he_dev->rbps_tail = &he_dev->rbps_base[CONFIG_RBPS_SIZE - 1];
-
-        he_writel(he_dev, he_dev->rbps_phys, G0_RBPS_S + (group * 32));
-        he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail),
-                                                G0_RBPS_T + (group * 32));
-        he_writel(he_dev, CONFIG_RBPS_BUFSIZE/4,
-                                                G0_RBPS_BS + (group * 32));
-        he_writel(he_dev,
-                        RBP_THRESH(CONFIG_RBPS_THRESH) |
-                        RBP_QSIZE(CONFIG_RBPS_SIZE - 1) |
-                        RBP_INT_ENB,
-                                                G0_RBPS_QI + (group * 32));
+        he_writel(he_dev, 0x0, G0_RBPS_S + (group * 32));
+        he_writel(he_dev, 0x0, G0_RBPS_T + (group * 32));
+        he_writel(he_dev, 0x0, G0_RBPS_QI + (group * 32));
+        he_writel(he_dev, RBP_THRESH(0x1) | RBP_QSIZE(0x0),
+                  G0_RBPS_BS + (group * 32));
 
         /* large buffer pool */
         he_dev->rbpl_pool = pci_pool_create("rbpl", he_dev->pci_dev,
                         CONFIG_RBPL_BUFSIZE, 8, 0);
         if (he_dev->rbpl_pool == NULL) {
                 hprintk("unable to create rbpl pool\n");
-                goto out_free_rbps_virt;
+                return -ENOMEM;
         }
 
         he_dev->rbpl_base = pci_alloc_consistent(he_dev->pci_dev,
@@ -934,19 +893,6 @@ out_free_rbpl_base:
 out_destroy_rbpl_pool:
         pci_pool_destroy(he_dev->rbpl_pool);
 
-        i = CONFIG_RBPS_SIZE;
-out_free_rbps_virt:
-        while (i--)
-                pci_pool_free(he_dev->rbps_pool, he_dev->rbps_virt[i].virt,
-                                he_dev->rbps_base[i].phys);
-        kfree(he_dev->rbps_virt);
-
-out_free_rbps_base:
-        pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE *
-                        sizeof(struct he_rbp), he_dev->rbps_base,
-                        he_dev->rbps_phys);
-out_destroy_rbps_pool:
-        pci_pool_destroy(he_dev->rbps_pool);
         return -ENOMEM;
 }
 
@@ -1634,22 +1580,6 @@ he_stop(struct he_dev *he_dev)
         if (he_dev->rbpl_pool)
                 pci_pool_destroy(he_dev->rbpl_pool);
 
-        if (he_dev->rbps_base) {
-                int i;
-
-                for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
-                        void *cpuaddr = he_dev->rbps_virt[i].virt;
-                        dma_addr_t dma_handle = he_dev->rbps_base[i].phys;
-
-                        pci_pool_free(he_dev->rbps_pool, cpuaddr, dma_handle);
-                }
-                pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
-                        * sizeof(struct he_rbp), he_dev->rbps_base, he_dev->rbps_phys);
-        }
-
-        if (he_dev->rbps_pool)
-                pci_pool_destroy(he_dev->rbps_pool);
-
         if (he_dev->rbrq_base)
                 pci_free_consistent(he_dev->pci_dev, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq),
                                                         he_dev->rbrq_base, he_dev->rbrq_phys);
@@ -1740,10 +1670,7 @@ he_service_rbrq(struct he_dev *he_dev, int group)
                         RBRQ_CON_CLOSED(he_dev->rbrq_head) ? " CON_CLOSED" : "",
                         RBRQ_HBUF_ERR(he_dev->rbrq_head) ? " HBUF_ERR" : "");
 
-                if (RBRQ_ADDR(he_dev->rbrq_head) & RBP_SMALLBUF)
-                        rbp = &he_dev->rbps_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
-                else
-                        rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
+                rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
                 
                 buf_len = RBRQ_BUFLEN(he_dev->rbrq_head) * 4;
                 cid = RBRQ_CID(he_dev->rbrq_head);
@@ -1819,15 +1746,9 @@ he_service_rbrq(struct he_dev *he_dev, int group)
 
                 __net_timestamp(skb);
 
-                for (iov = he_vcc->iov_head;
-                                iov < he_vcc->iov_tail; ++iov) {
-                        if (iov->iov_base & RBP_SMALLBUF)
-                                memcpy(skb_put(skb, iov->iov_len),
-                                        he_dev->rbps_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
-                        else
-                                memcpy(skb_put(skb, iov->iov_len),
-                                        he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
-                }
+                for (iov = he_vcc->iov_head; iov < he_vcc->iov_tail; ++iov)
+                        memcpy(skb_put(skb, iov->iov_len),
+                               he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
 
                 switch (vcc->qos.aal) {
                         case ATM_AAL0:
@@ -1867,13 +1788,8 @@ he_service_rbrq(struct he_dev *he_dev, int group)
 return_host_buffers:
                 ++pdus_assembled;
 
-                for (iov = he_vcc->iov_head;
-                                iov < he_vcc->iov_tail; ++iov) {
-                        if (iov->iov_base & RBP_SMALLBUF)
-                                rbp = &he_dev->rbps_base[RBP_INDEX(iov->iov_base)];
-                        else
-                                rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
-
+                for (iov = he_vcc->iov_head; iov < he_vcc->iov_tail; ++iov) {
+                        rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
                         rbp->status &= ~RBP_LOANED;
                 }
 
@@ -1978,7 +1894,6 @@ next_tbrq_entry:
         }
 }
 
-
 static void
 he_service_rbpl(struct he_dev *he_dev, int group)
 {
@@ -2007,33 +1922,6 @@ he_service_rbpl(struct he_dev *he_dev, int group)
 }
 
 static void
-he_service_rbps(struct he_dev *he_dev, int group)
-{
-        struct he_rbp *newtail;
-        struct he_rbp *rbps_head;
-        int moved = 0;
-
-        rbps_head = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
-                                        RBPS_MASK(he_readl(he_dev, G0_RBPS_S)));
-
-        for (;;) {
-                newtail = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
-                                                RBPS_MASK(he_dev->rbps_tail+1));
-
-                /* table 3.42 -- rbps_tail should never be set to rbps_head */
-                if ((newtail == rbps_head) || (newtail->status & RBP_LOANED))
-                        break;
-
-                newtail->status |= RBP_LOANED;
-                he_dev->rbps_tail = newtail;
-                ++moved;
-        } 
-
-        if (moved)
-                he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail), G0_RBPS_T);
-}
-
-static void
 he_tasklet(unsigned long data)
 {
         unsigned long flags;
@@ -2055,10 +1943,8 @@ he_tasklet(unsigned long data)
                                 HPRINTK("rbrq%d threshold\n", group);
                                 /* fall through */
                         case ITYPE_RBRQ_TIMER:
-                                if (he_service_rbrq(he_dev, group)) {
+                                if (he_service_rbrq(he_dev, group))
                                         he_service_rbpl(he_dev, group);
-                                        he_service_rbps(he_dev, group);
-                                }
                                 break;
                         case ITYPE_TBRQ_THRESH:
                                 HPRINTK("tbrq%d threshold\n", group);
@@ -2070,7 +1956,7 @@ he_tasklet(unsigned long data)
                                 he_service_rbpl(he_dev, group);
                                 break;
                         case ITYPE_RBPS_THRESH:
-                                he_service_rbps(he_dev, group);
+                                /* shouldn't happen unless small buffers enabled */
                                 break;
                         case ITYPE_PHY:
                                 HPRINTK("phy interrupt\n");
@@ -2098,7 +1984,6 @@ he_tasklet(unsigned long data)
 
                                 he_service_rbrq(he_dev, 0);
                                 he_service_rbpl(he_dev, 0);
-                                he_service_rbps(he_dev, 0);
                                 he_service_tbrq(he_dev, 0);
                                 break;
                         default:
@@ -2406,8 +2291,8 @@ he_open(struct atm_vcc *vcc)
                         goto open_failed;
                 }
 
-                rsr1 = RSR1_GROUP(0);
-                rsr4 = RSR4_GROUP(0);
+                rsr1 = RSR1_GROUP(0) | RSR1_RBPL_ONLY;
+                rsr4 = RSR4_GROUP(0) | RSR4_RBPL_ONLY;
                 rsr0 = vcc->qos.rxtp.traffic_class == ATM_UBR ? 
                                 (RSR0_EPD_ENABLE|RSR0_PPD_ENABLE) : 0;