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-rw-r--r--drivers/char/mbcs.c849
1 files changed, 849 insertions, 0 deletions
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
new file mode 100644
index 000000000000..ec7100556c50
--- /dev/null
+++ b/drivers/char/mbcs.c
@@ -0,0 +1,849 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (c) 2005 Silicon Graphics, Inc. All rights reserved.
7 */
8
9/*
10 * MOATB Core Services driver.
11 */
12
13#include <linux/config.h>
14#include <linux/interrupt.h>
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/types.h>
18#include <linux/ioport.h>
19#include <linux/notifier.h>
20#include <linux/reboot.h>
21#include <linux/init.h>
22#include <linux/fs.h>
23#include <linux/delay.h>
24#include <linux/device.h>
25#include <linux/mm.h>
26#include <linux/uio.h>
27#include <asm/io.h>
28#include <asm/uaccess.h>
29#include <asm/system.h>
30#include <asm/pgtable.h>
31#include <asm/sn/addrs.h>
32#include <asm/sn/intr.h>
33#include <asm/sn/tiocx.h>
34#include "mbcs.h"
35
36#define MBCS_DEBUG 0
37#if MBCS_DEBUG
38#define DBG(fmt...) printk(KERN_ALERT fmt)
39#else
40#define DBG(fmt...)
41#endif
42int mbcs_major;
43
44LIST_HEAD(soft_list);
45
46/*
47 * file operations
48 */
49struct file_operations mbcs_ops = {
50 .open = mbcs_open,
51 .llseek = mbcs_sram_llseek,
52 .read = mbcs_sram_read,
53 .write = mbcs_sram_write,
54 .mmap = mbcs_gscr_mmap,
55};
56
57struct mbcs_callback_arg {
58 int minor;
59 struct cx_dev *cx_dev;
60};
61
62static inline void mbcs_getdma_init(struct getdma *gdma)
63{
64 memset(gdma, 0, sizeof(struct getdma));
65 gdma->DoneIntEnable = 1;
66}
67
68static inline void mbcs_putdma_init(struct putdma *pdma)
69{
70 memset(pdma, 0, sizeof(struct putdma));
71 pdma->DoneIntEnable = 1;
72}
73
74static inline void mbcs_algo_init(struct algoblock *algo_soft)
75{
76 memset(algo_soft, 0, sizeof(struct algoblock));
77}
78
79static inline void mbcs_getdma_set(void *mmr,
80 uint64_t hostAddr,
81 uint64_t localAddr,
82 uint64_t localRamSel,
83 uint64_t numPkts,
84 uint64_t amoEnable,
85 uint64_t intrEnable,
86 uint64_t peerIO,
87 uint64_t amoHostDest,
88 uint64_t amoModType, uint64_t intrHostDest,
89 uint64_t intrVector)
90{
91 union dma_control rdma_control;
92 union dma_amo_dest amo_dest;
93 union intr_dest intr_dest;
94 union dma_localaddr local_addr;
95 union dma_hostaddr host_addr;
96
97 rdma_control.dma_control_reg = 0;
98 amo_dest.dma_amo_dest_reg = 0;
99 intr_dest.intr_dest_reg = 0;
100 local_addr.dma_localaddr_reg = 0;
101 host_addr.dma_hostaddr_reg = 0;
102
103 host_addr.dma_sys_addr = hostAddr;
104 MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
105
106 local_addr.dma_ram_addr = localAddr;
107 local_addr.dma_ram_sel = localRamSel;
108 MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
109
110 rdma_control.dma_op_length = numPkts;
111 rdma_control.done_amo_en = amoEnable;
112 rdma_control.done_int_en = intrEnable;
113 rdma_control.pio_mem_n = peerIO;
114 MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg);
115
116 amo_dest.dma_amo_sys_addr = amoHostDest;
117 amo_dest.dma_amo_mod_type = amoModType;
118 MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
119
120 intr_dest.address = intrHostDest;
121 intr_dest.int_vector = intrVector;
122 MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg);
123
124}
125
126static inline void mbcs_putdma_set(void *mmr,
127 uint64_t hostAddr,
128 uint64_t localAddr,
129 uint64_t localRamSel,
130 uint64_t numPkts,
131 uint64_t amoEnable,
132 uint64_t intrEnable,
133 uint64_t peerIO,
134 uint64_t amoHostDest,
135 uint64_t amoModType,
136 uint64_t intrHostDest, uint64_t intrVector)
137{
138 union dma_control wdma_control;
139 union dma_amo_dest amo_dest;
140 union intr_dest intr_dest;
141 union dma_localaddr local_addr;
142 union dma_hostaddr host_addr;
143
144 wdma_control.dma_control_reg = 0;
145 amo_dest.dma_amo_dest_reg = 0;
146 intr_dest.intr_dest_reg = 0;
147 local_addr.dma_localaddr_reg = 0;
148 host_addr.dma_hostaddr_reg = 0;
149
150 host_addr.dma_sys_addr = hostAddr;
151 MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
152
153 local_addr.dma_ram_addr = localAddr;
154 local_addr.dma_ram_sel = localRamSel;
155 MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
156
157 wdma_control.dma_op_length = numPkts;
158 wdma_control.done_amo_en = amoEnable;
159 wdma_control.done_int_en = intrEnable;
160 wdma_control.pio_mem_n = peerIO;
161 MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg);
162
163 amo_dest.dma_amo_sys_addr = amoHostDest;
164 amo_dest.dma_amo_mod_type = amoModType;
165 MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
166
167 intr_dest.address = intrHostDest;
168 intr_dest.int_vector = intrVector;
169 MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg);
170
171}
172
173static inline void mbcs_algo_set(void *mmr,
174 uint64_t amoHostDest,
175 uint64_t amoModType,
176 uint64_t intrHostDest,
177 uint64_t intrVector, uint64_t algoStepCount)
178{
179 union dma_amo_dest amo_dest;
180 union intr_dest intr_dest;
181 union algo_step step;
182
183 step.algo_step_reg = 0;
184 intr_dest.intr_dest_reg = 0;
185 amo_dest.dma_amo_dest_reg = 0;
186
187 amo_dest.dma_amo_sys_addr = amoHostDest;
188 amo_dest.dma_amo_mod_type = amoModType;
189 MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg);
190
191 intr_dest.address = intrHostDest;
192 intr_dest.int_vector = intrVector;
193 MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg);
194
195 step.alg_step_cnt = algoStepCount;
196 MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg);
197}
198
199static inline int mbcs_getdma_start(struct mbcs_soft *soft)
200{
201 void *mmr_base;
202 struct getdma *gdma;
203 uint64_t numPkts;
204 union cm_control cm_control;
205
206 mmr_base = soft->mmr_base;
207 gdma = &soft->getdma;
208
209 /* check that host address got setup */
210 if (!gdma->hostAddr)
211 return -1;
212
213 numPkts =
214 (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
215
216 /* program engine */
217 mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr),
218 gdma->localAddr,
219 (gdma->localAddr < MB2) ? 0 :
220 (gdma->localAddr < MB4) ? 1 :
221 (gdma->localAddr < MB6) ? 2 : 3,
222 numPkts,
223 gdma->DoneAmoEnable,
224 gdma->DoneIntEnable,
225 gdma->peerIO,
226 gdma->amoHostDest,
227 gdma->amoModType,
228 gdma->intrHostDest, gdma->intrVector);
229
230 /* start engine */
231 cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
232 cm_control.rd_dma_go = 1;
233 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
234
235 return 0;
236
237}
238
239static inline int mbcs_putdma_start(struct mbcs_soft *soft)
240{
241 void *mmr_base;
242 struct putdma *pdma;
243 uint64_t numPkts;
244 union cm_control cm_control;
245
246 mmr_base = soft->mmr_base;
247 pdma = &soft->putdma;
248
249 /* check that host address got setup */
250 if (!pdma->hostAddr)
251 return -1;
252
253 numPkts =
254 (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
255
256 /* program engine */
257 mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr),
258 pdma->localAddr,
259 (pdma->localAddr < MB2) ? 0 :
260 (pdma->localAddr < MB4) ? 1 :
261 (pdma->localAddr < MB6) ? 2 : 3,
262 numPkts,
263 pdma->DoneAmoEnable,
264 pdma->DoneIntEnable,
265 pdma->peerIO,
266 pdma->amoHostDest,
267 pdma->amoModType,
268 pdma->intrHostDest, pdma->intrVector);
269
270 /* start engine */
271 cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
272 cm_control.wr_dma_go = 1;
273 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
274
275 return 0;
276
277}
278
279static inline int mbcs_algo_start(struct mbcs_soft *soft)
280{
281 struct algoblock *algo_soft = &soft->algo;
282 void *mmr_base = soft->mmr_base;
283 union cm_control cm_control;
284
285 if (down_interruptible(&soft->algolock))
286 return -ERESTARTSYS;
287
288 atomic_set(&soft->algo_done, 0);
289
290 mbcs_algo_set(mmr_base,
291 algo_soft->amoHostDest,
292 algo_soft->amoModType,
293 algo_soft->intrHostDest,
294 algo_soft->intrVector, algo_soft->algoStepCount);
295
296 /* start algorithm */
297 cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
298 cm_control.alg_done_int_en = 1;
299 cm_control.alg_go = 1;
300 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
301
302 up(&soft->algolock);
303
304 return 0;
305}
306
307static inline ssize_t
308do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
309 size_t len, loff_t * off)
310{
311 int rv = 0;
312
313 if (down_interruptible(&soft->dmawritelock))
314 return -ERESTARTSYS;
315
316 atomic_set(&soft->dmawrite_done, 0);
317
318 soft->putdma.hostAddr = hostAddr;
319 soft->putdma.localAddr = *off;
320 soft->putdma.bytes = len;
321
322 if (mbcs_putdma_start(soft) < 0) {
323 DBG(KERN_ALERT "do_mbcs_sram_dmawrite: "
324 "mbcs_putdma_start failed\n");
325 rv = -EAGAIN;
326 goto dmawrite_exit;
327 }
328
329 if (wait_event_interruptible(soft->dmawrite_queue,
330 atomic_read(&soft->dmawrite_done))) {
331 rv = -ERESTARTSYS;
332 goto dmawrite_exit;
333 }
334
335 rv = len;
336 *off += len;
337
338dmawrite_exit:
339 up(&soft->dmawritelock);
340
341 return rv;
342}
343
344static inline ssize_t
345do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr,
346 size_t len, loff_t * off)
347{
348 int rv = 0;
349
350 if (down_interruptible(&soft->dmareadlock))
351 return -ERESTARTSYS;
352
353 atomic_set(&soft->dmawrite_done, 0);
354
355 soft->getdma.hostAddr = hostAddr;
356 soft->getdma.localAddr = *off;
357 soft->getdma.bytes = len;
358
359 if (mbcs_getdma_start(soft) < 0) {
360 DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n");
361 rv = -EAGAIN;
362 goto dmaread_exit;
363 }
364
365 if (wait_event_interruptible(soft->dmaread_queue,
366 atomic_read(&soft->dmaread_done))) {
367 rv = -ERESTARTSYS;
368 goto dmaread_exit;
369 }
370
371 rv = len;
372 *off += len;
373
374dmaread_exit:
375 up(&soft->dmareadlock);
376
377 return rv;
378}
379
380int mbcs_open(struct inode *ip, struct file *fp)
381{
382 struct mbcs_soft *soft;
383 int minor;
384
385 minor = iminor(ip);
386
387 list_for_each_entry(soft, &soft_list, list) {
388 if (soft->nasid == minor) {
389 fp->private_data = soft->cxdev;
390 return 0;
391 }
392 }
393
394 return -ENODEV;
395}
396
397ssize_t mbcs_sram_read(struct file * fp, char *buf, size_t len, loff_t * off)
398{
399 struct cx_dev *cx_dev = fp->private_data;
400 struct mbcs_soft *soft = cx_dev->soft;
401 uint64_t hostAddr;
402 int rv = 0;
403
404 hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
405 if (hostAddr == 0)
406 return -ENOMEM;
407
408 rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off);
409 if (rv < 0)
410 goto exit;
411
412 if (copy_to_user(buf, (void *)hostAddr, len))
413 rv = -EFAULT;
414
415 exit:
416 free_pages(hostAddr, get_order(len));
417
418 return rv;
419}
420
421ssize_t
422mbcs_sram_write(struct file * fp, const char *buf, size_t len, loff_t * off)
423{
424 struct cx_dev *cx_dev = fp->private_data;
425 struct mbcs_soft *soft = cx_dev->soft;
426 uint64_t hostAddr;
427 int rv = 0;
428
429 hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
430 if (hostAddr == 0)
431 return -ENOMEM;
432
433 if (copy_from_user((void *)hostAddr, buf, len)) {
434 rv = -EFAULT;
435 goto exit;
436 }
437
438 rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off);
439
440 exit:
441 free_pages(hostAddr, get_order(len));
442
443 return rv;
444}
445
446loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence)
447{
448 loff_t newpos;
449
450 switch (whence) {
451 case 0: /* SEEK_SET */
452 newpos = off;
453 break;
454
455 case 1: /* SEEK_CUR */
456 newpos = filp->f_pos + off;
457 break;
458
459 case 2: /* SEEK_END */
460 newpos = MBCS_SRAM_SIZE + off;
461 break;
462
463 default: /* can't happen */
464 return -EINVAL;
465 }
466
467 if (newpos < 0)
468 return -EINVAL;
469
470 filp->f_pos = newpos;
471
472 return newpos;
473}
474
475static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset)
476{
477 uint64_t mmr_base;
478
479 mmr_base = (uint64_t) (soft->mmr_base + offset);
480
481 return mmr_base;
482}
483
484static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft)
485{
486 soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START);
487}
488
489static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft)
490{
491 soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START);
492}
493
494int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma)
495{
496 struct cx_dev *cx_dev = fp->private_data;
497 struct mbcs_soft *soft = cx_dev->soft;
498
499 if (vma->vm_pgoff != 0)
500 return -EINVAL;
501
502 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
503
504 /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
505 if (remap_pfn_range(vma,
506 vma->vm_start,
507 __pa(soft->gscr_addr) >> PAGE_SHIFT,
508 PAGE_SIZE,
509 vma->vm_page_prot))
510 return -EAGAIN;
511
512 return 0;
513}
514
515/**
516 * mbcs_completion_intr_handler - Primary completion handler.
517 * @irq: irq
518 * @arg: soft struct for device
519 * @ep: regs
520 *
521 */
522static irqreturn_t
523mbcs_completion_intr_handler(int irq, void *arg, struct pt_regs *ep)
524{
525 struct mbcs_soft *soft = (struct mbcs_soft *)arg;
526 void *mmr_base;
527 union cm_status cm_status;
528 union cm_control cm_control;
529
530 mmr_base = soft->mmr_base;
531 cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS);
532
533 if (cm_status.rd_dma_done) {
534 /* stop dma-read engine, clear status */
535 cm_control.cm_control_reg =
536 MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
537 cm_control.rd_dma_clr = 1;
538 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
539 cm_control.cm_control_reg);
540 atomic_set(&soft->dmaread_done, 1);
541 wake_up(&soft->dmaread_queue);
542 }
543 if (cm_status.wr_dma_done) {
544 /* stop dma-write engine, clear status */
545 cm_control.cm_control_reg =
546 MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
547 cm_control.wr_dma_clr = 1;
548 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
549 cm_control.cm_control_reg);
550 atomic_set(&soft->dmawrite_done, 1);
551 wake_up(&soft->dmawrite_queue);
552 }
553 if (cm_status.alg_done) {
554 /* clear status */
555 cm_control.cm_control_reg =
556 MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
557 cm_control.alg_done_clr = 1;
558 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
559 cm_control.cm_control_reg);
560 atomic_set(&soft->algo_done, 1);
561 wake_up(&soft->algo_queue);
562 }
563
564 return IRQ_HANDLED;
565}
566
567/**
568 * mbcs_intr_alloc - Allocate interrupts.
569 * @dev: device pointer
570 *
571 */
572static int mbcs_intr_alloc(struct cx_dev *dev)
573{
574 struct sn_irq_info *sn_irq;
575 struct mbcs_soft *soft;
576 struct getdma *getdma;
577 struct putdma *putdma;
578 struct algoblock *algo;
579
580 soft = dev->soft;
581 getdma = &soft->getdma;
582 putdma = &soft->putdma;
583 algo = &soft->algo;
584
585 soft->get_sn_irq = NULL;
586 soft->put_sn_irq = NULL;
587 soft->algo_sn_irq = NULL;
588
589 sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
590 if (sn_irq == NULL)
591 return -EAGAIN;
592 soft->get_sn_irq = sn_irq;
593 getdma->intrHostDest = sn_irq->irq_xtalkaddr;
594 getdma->intrVector = sn_irq->irq_irq;
595 if (request_irq(sn_irq->irq_irq,
596 (void *)mbcs_completion_intr_handler, SA_SHIRQ,
597 "MBCS get intr", (void *)soft)) {
598 tiocx_irq_free(soft->get_sn_irq);
599 return -EAGAIN;
600 }
601
602 sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
603 if (sn_irq == NULL) {
604 free_irq(soft->get_sn_irq->irq_irq, soft);
605 tiocx_irq_free(soft->get_sn_irq);
606 return -EAGAIN;
607 }
608 soft->put_sn_irq = sn_irq;
609 putdma->intrHostDest = sn_irq->irq_xtalkaddr;
610 putdma->intrVector = sn_irq->irq_irq;
611 if (request_irq(sn_irq->irq_irq,
612 (void *)mbcs_completion_intr_handler, SA_SHIRQ,
613 "MBCS put intr", (void *)soft)) {
614 tiocx_irq_free(soft->put_sn_irq);
615 free_irq(soft->get_sn_irq->irq_irq, soft);
616 tiocx_irq_free(soft->get_sn_irq);
617 return -EAGAIN;
618 }
619
620 sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
621 if (sn_irq == NULL) {
622 free_irq(soft->put_sn_irq->irq_irq, soft);
623 tiocx_irq_free(soft->put_sn_irq);
624 free_irq(soft->get_sn_irq->irq_irq, soft);
625 tiocx_irq_free(soft->get_sn_irq);
626 return -EAGAIN;
627 }
628 soft->algo_sn_irq = sn_irq;
629 algo->intrHostDest = sn_irq->irq_xtalkaddr;
630 algo->intrVector = sn_irq->irq_irq;
631 if (request_irq(sn_irq->irq_irq,
632 (void *)mbcs_completion_intr_handler, SA_SHIRQ,
633 "MBCS algo intr", (void *)soft)) {
634 tiocx_irq_free(soft->algo_sn_irq);
635 free_irq(soft->put_sn_irq->irq_irq, soft);
636 tiocx_irq_free(soft->put_sn_irq);
637 free_irq(soft->get_sn_irq->irq_irq, soft);
638 tiocx_irq_free(soft->get_sn_irq);
639 return -EAGAIN;
640 }
641
642 return 0;
643}
644
645/**
646 * mbcs_intr_dealloc - Remove interrupts.
647 * @dev: device pointer
648 *
649 */
650static void mbcs_intr_dealloc(struct cx_dev *dev)
651{
652 struct mbcs_soft *soft;
653
654 soft = dev->soft;
655
656 free_irq(soft->get_sn_irq->irq_irq, soft);
657 tiocx_irq_free(soft->get_sn_irq);
658 free_irq(soft->put_sn_irq->irq_irq, soft);
659 tiocx_irq_free(soft->put_sn_irq);
660 free_irq(soft->algo_sn_irq->irq_irq, soft);
661 tiocx_irq_free(soft->algo_sn_irq);
662}
663
664static inline int mbcs_hw_init(struct mbcs_soft *soft)
665{
666 void *mmr_base = soft->mmr_base;
667 union cm_control cm_control;
668 union cm_req_timeout cm_req_timeout;
669 uint64_t err_stat;
670
671 cm_req_timeout.cm_req_timeout_reg =
672 MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT);
673
674 cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK;
675 MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT,
676 cm_req_timeout.cm_req_timeout_reg);
677
678 mbcs_gscr_pioaddr_set(soft);
679 mbcs_debug_pioaddr_set(soft);
680
681 /* clear errors */
682 err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT);
683 MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat);
684 MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1);
685
686 /* enable interrupts */
687 /* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */
688 MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL);
689
690 /* arm status regs and clear engines */
691 cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
692 cm_control.rearm_stat_regs = 1;
693 cm_control.alg_clr = 1;
694 cm_control.wr_dma_clr = 1;
695 cm_control.rd_dma_clr = 1;
696
697 MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
698
699 return 0;
700}
701
702static ssize_t show_algo(struct device *dev, char *buf)
703{
704 struct cx_dev *cx_dev = to_cx_dev(dev);
705 struct mbcs_soft *soft = cx_dev->soft;
706 uint64_t debug0;
707
708 /*
709 * By convention, the first debug register contains the
710 * algorithm number and revision.
711 */
712 debug0 = *(uint64_t *) soft->debug_addr;
713
714 return sprintf(buf, "0x%lx 0x%lx\n",
715 (debug0 >> 32), (debug0 & 0xffffffff));
716}
717
718static ssize_t store_algo(struct device *dev, const char *buf, size_t count)
719{
720 int n;
721 struct cx_dev *cx_dev = to_cx_dev(dev);
722 struct mbcs_soft *soft = cx_dev->soft;
723
724 if (count <= 0)
725 return 0;
726
727 n = simple_strtoul(buf, NULL, 0);
728
729 if (n == 1) {
730 mbcs_algo_start(soft);
731 if (wait_event_interruptible(soft->algo_queue,
732 atomic_read(&soft->algo_done)))
733 return -ERESTARTSYS;
734 }
735
736 return count;
737}
738
739DEVICE_ATTR(algo, 0644, show_algo, store_algo);
740
741/**
742 * mbcs_probe - Initialize for device
743 * @dev: device pointer
744 * @device_id: id table pointer
745 *
746 */
747static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id)
748{
749 struct mbcs_soft *soft;
750
751 dev->soft = NULL;
752
753 soft = kcalloc(1, sizeof(struct mbcs_soft), GFP_KERNEL);
754 if (soft == NULL)
755 return -ENOMEM;
756
757 soft->nasid = dev->cx_id.nasid;
758 list_add(&soft->list, &soft_list);
759 soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid);
760 dev->soft = soft;
761 soft->cxdev = dev;
762
763 init_waitqueue_head(&soft->dmawrite_queue);
764 init_waitqueue_head(&soft->dmaread_queue);
765 init_waitqueue_head(&soft->algo_queue);
766
767 init_MUTEX(&soft->dmawritelock);
768 init_MUTEX(&soft->dmareadlock);
769 init_MUTEX(&soft->algolock);
770
771 mbcs_getdma_init(&soft->getdma);
772 mbcs_putdma_init(&soft->putdma);
773 mbcs_algo_init(&soft->algo);
774
775 mbcs_hw_init(soft);
776
777 /* Allocate interrupts */
778 mbcs_intr_alloc(dev);
779
780 device_create_file(&dev->dev, &dev_attr_algo);
781
782 return 0;
783}
784
785static int mbcs_remove(struct cx_dev *dev)
786{
787 if (dev->soft) {
788 mbcs_intr_dealloc(dev);
789 kfree(dev->soft);
790 }
791
792 device_remove_file(&dev->dev, &dev_attr_algo);
793
794 return 0;
795}
796
797const struct cx_device_id __devinitdata mbcs_id_table[] = {
798 {
799 .part_num = MBCS_PART_NUM,
800 .mfg_num = MBCS_MFG_NUM,
801 },
802 {
803 .part_num = MBCS_PART_NUM_ALG0,
804 .mfg_num = MBCS_MFG_NUM,
805 },
806 {0, 0}
807};
808
809MODULE_DEVICE_TABLE(cx, mbcs_id_table);
810
811struct cx_drv mbcs_driver = {
812 .name = DEVICE_NAME,
813 .id_table = mbcs_id_table,
814 .probe = mbcs_probe,
815 .remove = mbcs_remove,
816};
817
818static void __exit mbcs_exit(void)
819{
820 int rv;
821
822 rv = unregister_chrdev(mbcs_major, DEVICE_NAME);
823 if (rv < 0)
824 DBG(KERN_ALERT "Error in unregister_chrdev: %d\n", rv);
825
826 cx_driver_unregister(&mbcs_driver);
827}
828
829static int __init mbcs_init(void)
830{
831 int rv;
832
833 // Put driver into chrdevs[]. Get major number.
834 rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops);
835 if (rv < 0) {
836 DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv);
837 return rv;
838 }
839 mbcs_major = rv;
840
841 return cx_driver_register(&mbcs_driver);
842}
843
844module_init(mbcs_init);
845module_exit(mbcs_exit);
846
847MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
848MODULE_DESCRIPTION("Driver for MOATB Core Services");
849MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 06:14:05 -0500