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e1e19747 BL |
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 | ||
e1e19747 BL |
13 | #include <linux/interrupt.h> |
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/ioport.h> | |
18 | #include <linux/notifier.h> | |
19 | #include <linux/reboot.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/uio.h> | |
26 | #include <asm/io.h> | |
27 | #include <asm/uaccess.h> | |
28 | #include <asm/system.h> | |
29 | #include <asm/pgtable.h> | |
30 | #include <asm/sn/addrs.h> | |
31 | #include <asm/sn/intr.h> | |
32 | #include <asm/sn/tiocx.h> | |
33 | #include "mbcs.h" | |
34 | ||
35 | #define MBCS_DEBUG 0 | |
36 | #if MBCS_DEBUG | |
37 | #define DBG(fmt...) printk(KERN_ALERT fmt) | |
38 | #else | |
39 | #define DBG(fmt...) | |
40 | #endif | |
41 | int mbcs_major; | |
42 | ||
43 | LIST_HEAD(soft_list); | |
44 | ||
45 | /* | |
46 | * file operations | |
47 | */ | |
48 | struct file_operations mbcs_ops = { | |
49 | .open = mbcs_open, | |
50 | .llseek = mbcs_sram_llseek, | |
51 | .read = mbcs_sram_read, | |
52 | .write = mbcs_sram_write, | |
53 | .mmap = mbcs_gscr_mmap, | |
54 | }; | |
55 | ||
56 | struct mbcs_callback_arg { | |
57 | int minor; | |
58 | struct cx_dev *cx_dev; | |
59 | }; | |
60 | ||
61 | static inline void mbcs_getdma_init(struct getdma *gdma) | |
62 | { | |
63 | memset(gdma, 0, sizeof(struct getdma)); | |
64 | gdma->DoneIntEnable = 1; | |
65 | } | |
66 | ||
67 | static inline void mbcs_putdma_init(struct putdma *pdma) | |
68 | { | |
69 | memset(pdma, 0, sizeof(struct putdma)); | |
70 | pdma->DoneIntEnable = 1; | |
71 | } | |
72 | ||
73 | static inline void mbcs_algo_init(struct algoblock *algo_soft) | |
74 | { | |
75 | memset(algo_soft, 0, sizeof(struct algoblock)); | |
76 | } | |
77 | ||
78 | static inline void mbcs_getdma_set(void *mmr, | |
79 | uint64_t hostAddr, | |
80 | uint64_t localAddr, | |
81 | uint64_t localRamSel, | |
82 | uint64_t numPkts, | |
83 | uint64_t amoEnable, | |
84 | uint64_t intrEnable, | |
85 | uint64_t peerIO, | |
86 | uint64_t amoHostDest, | |
87 | uint64_t amoModType, uint64_t intrHostDest, | |
88 | uint64_t intrVector) | |
89 | { | |
90 | union dma_control rdma_control; | |
91 | union dma_amo_dest amo_dest; | |
92 | union intr_dest intr_dest; | |
93 | union dma_localaddr local_addr; | |
94 | union dma_hostaddr host_addr; | |
95 | ||
96 | rdma_control.dma_control_reg = 0; | |
97 | amo_dest.dma_amo_dest_reg = 0; | |
98 | intr_dest.intr_dest_reg = 0; | |
99 | local_addr.dma_localaddr_reg = 0; | |
100 | host_addr.dma_hostaddr_reg = 0; | |
101 | ||
102 | host_addr.dma_sys_addr = hostAddr; | |
103 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); | |
104 | ||
105 | local_addr.dma_ram_addr = localAddr; | |
106 | local_addr.dma_ram_sel = localRamSel; | |
107 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); | |
108 | ||
109 | rdma_control.dma_op_length = numPkts; | |
110 | rdma_control.done_amo_en = amoEnable; | |
111 | rdma_control.done_int_en = intrEnable; | |
112 | rdma_control.pio_mem_n = peerIO; | |
113 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg); | |
114 | ||
115 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
116 | amo_dest.dma_amo_mod_type = amoModType; | |
117 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
118 | ||
119 | intr_dest.address = intrHostDest; | |
120 | intr_dest.int_vector = intrVector; | |
121 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg); | |
122 | ||
123 | } | |
124 | ||
125 | static inline void mbcs_putdma_set(void *mmr, | |
126 | uint64_t hostAddr, | |
127 | uint64_t localAddr, | |
128 | uint64_t localRamSel, | |
129 | uint64_t numPkts, | |
130 | uint64_t amoEnable, | |
131 | uint64_t intrEnable, | |
132 | uint64_t peerIO, | |
133 | uint64_t amoHostDest, | |
134 | uint64_t amoModType, | |
135 | uint64_t intrHostDest, uint64_t intrVector) | |
136 | { | |
137 | union dma_control wdma_control; | |
138 | union dma_amo_dest amo_dest; | |
139 | union intr_dest intr_dest; | |
140 | union dma_localaddr local_addr; | |
141 | union dma_hostaddr host_addr; | |
142 | ||
143 | wdma_control.dma_control_reg = 0; | |
144 | amo_dest.dma_amo_dest_reg = 0; | |
145 | intr_dest.intr_dest_reg = 0; | |
146 | local_addr.dma_localaddr_reg = 0; | |
147 | host_addr.dma_hostaddr_reg = 0; | |
148 | ||
149 | host_addr.dma_sys_addr = hostAddr; | |
150 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); | |
151 | ||
152 | local_addr.dma_ram_addr = localAddr; | |
153 | local_addr.dma_ram_sel = localRamSel; | |
154 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); | |
155 | ||
156 | wdma_control.dma_op_length = numPkts; | |
157 | wdma_control.done_amo_en = amoEnable; | |
158 | wdma_control.done_int_en = intrEnable; | |
159 | wdma_control.pio_mem_n = peerIO; | |
160 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg); | |
161 | ||
162 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
163 | amo_dest.dma_amo_mod_type = amoModType; | |
164 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
165 | ||
166 | intr_dest.address = intrHostDest; | |
167 | intr_dest.int_vector = intrVector; | |
168 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg); | |
169 | ||
170 | } | |
171 | ||
172 | static inline void mbcs_algo_set(void *mmr, | |
173 | uint64_t amoHostDest, | |
174 | uint64_t amoModType, | |
175 | uint64_t intrHostDest, | |
176 | uint64_t intrVector, uint64_t algoStepCount) | |
177 | { | |
178 | union dma_amo_dest amo_dest; | |
179 | union intr_dest intr_dest; | |
180 | union algo_step step; | |
181 | ||
182 | step.algo_step_reg = 0; | |
183 | intr_dest.intr_dest_reg = 0; | |
184 | amo_dest.dma_amo_dest_reg = 0; | |
185 | ||
186 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
187 | amo_dest.dma_amo_mod_type = amoModType; | |
188 | MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
189 | ||
190 | intr_dest.address = intrHostDest; | |
191 | intr_dest.int_vector = intrVector; | |
192 | MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg); | |
193 | ||
194 | step.alg_step_cnt = algoStepCount; | |
195 | MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg); | |
196 | } | |
197 | ||
198 | static inline int mbcs_getdma_start(struct mbcs_soft *soft) | |
199 | { | |
200 | void *mmr_base; | |
201 | struct getdma *gdma; | |
202 | uint64_t numPkts; | |
203 | union cm_control cm_control; | |
204 | ||
205 | mmr_base = soft->mmr_base; | |
206 | gdma = &soft->getdma; | |
207 | ||
208 | /* check that host address got setup */ | |
209 | if (!gdma->hostAddr) | |
210 | return -1; | |
211 | ||
212 | numPkts = | |
213 | (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; | |
214 | ||
215 | /* program engine */ | |
216 | mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr), | |
217 | gdma->localAddr, | |
218 | (gdma->localAddr < MB2) ? 0 : | |
219 | (gdma->localAddr < MB4) ? 1 : | |
220 | (gdma->localAddr < MB6) ? 2 : 3, | |
221 | numPkts, | |
222 | gdma->DoneAmoEnable, | |
223 | gdma->DoneIntEnable, | |
224 | gdma->peerIO, | |
225 | gdma->amoHostDest, | |
226 | gdma->amoModType, | |
227 | gdma->intrHostDest, gdma->intrVector); | |
228 | ||
229 | /* start engine */ | |
230 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
231 | cm_control.rd_dma_go = 1; | |
232 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
233 | ||
234 | return 0; | |
235 | ||
236 | } | |
237 | ||
238 | static inline int mbcs_putdma_start(struct mbcs_soft *soft) | |
239 | { | |
240 | void *mmr_base; | |
241 | struct putdma *pdma; | |
242 | uint64_t numPkts; | |
243 | union cm_control cm_control; | |
244 | ||
245 | mmr_base = soft->mmr_base; | |
246 | pdma = &soft->putdma; | |
247 | ||
248 | /* check that host address got setup */ | |
249 | if (!pdma->hostAddr) | |
250 | return -1; | |
251 | ||
252 | numPkts = | |
253 | (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; | |
254 | ||
255 | /* program engine */ | |
256 | mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr), | |
257 | pdma->localAddr, | |
258 | (pdma->localAddr < MB2) ? 0 : | |
259 | (pdma->localAddr < MB4) ? 1 : | |
260 | (pdma->localAddr < MB6) ? 2 : 3, | |
261 | numPkts, | |
262 | pdma->DoneAmoEnable, | |
263 | pdma->DoneIntEnable, | |
264 | pdma->peerIO, | |
265 | pdma->amoHostDest, | |
266 | pdma->amoModType, | |
267 | pdma->intrHostDest, pdma->intrVector); | |
268 | ||
269 | /* start engine */ | |
270 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
271 | cm_control.wr_dma_go = 1; | |
272 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
273 | ||
274 | return 0; | |
275 | ||
276 | } | |
277 | ||
278 | static inline int mbcs_algo_start(struct mbcs_soft *soft) | |
279 | { | |
280 | struct algoblock *algo_soft = &soft->algo; | |
281 | void *mmr_base = soft->mmr_base; | |
282 | union cm_control cm_control; | |
283 | ||
284 | if (down_interruptible(&soft->algolock)) | |
285 | return -ERESTARTSYS; | |
286 | ||
287 | atomic_set(&soft->algo_done, 0); | |
288 | ||
289 | mbcs_algo_set(mmr_base, | |
290 | algo_soft->amoHostDest, | |
291 | algo_soft->amoModType, | |
292 | algo_soft->intrHostDest, | |
293 | algo_soft->intrVector, algo_soft->algoStepCount); | |
294 | ||
295 | /* start algorithm */ | |
296 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
297 | cm_control.alg_done_int_en = 1; | |
298 | cm_control.alg_go = 1; | |
299 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
300 | ||
301 | up(&soft->algolock); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static inline ssize_t | |
307 | do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr, | |
308 | size_t len, loff_t * off) | |
309 | { | |
310 | int rv = 0; | |
311 | ||
312 | if (down_interruptible(&soft->dmawritelock)) | |
313 | return -ERESTARTSYS; | |
314 | ||
315 | atomic_set(&soft->dmawrite_done, 0); | |
316 | ||
317 | soft->putdma.hostAddr = hostAddr; | |
318 | soft->putdma.localAddr = *off; | |
319 | soft->putdma.bytes = len; | |
320 | ||
321 | if (mbcs_putdma_start(soft) < 0) { | |
322 | DBG(KERN_ALERT "do_mbcs_sram_dmawrite: " | |
323 | "mbcs_putdma_start failed\n"); | |
324 | rv = -EAGAIN; | |
325 | goto dmawrite_exit; | |
326 | } | |
327 | ||
328 | if (wait_event_interruptible(soft->dmawrite_queue, | |
329 | atomic_read(&soft->dmawrite_done))) { | |
330 | rv = -ERESTARTSYS; | |
331 | goto dmawrite_exit; | |
332 | } | |
333 | ||
334 | rv = len; | |
335 | *off += len; | |
336 | ||
337 | dmawrite_exit: | |
338 | up(&soft->dmawritelock); | |
339 | ||
340 | return rv; | |
341 | } | |
342 | ||
343 | static inline ssize_t | |
344 | do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr, | |
345 | size_t len, loff_t * off) | |
346 | { | |
347 | int rv = 0; | |
348 | ||
349 | if (down_interruptible(&soft->dmareadlock)) | |
350 | return -ERESTARTSYS; | |
351 | ||
352 | atomic_set(&soft->dmawrite_done, 0); | |
353 | ||
354 | soft->getdma.hostAddr = hostAddr; | |
355 | soft->getdma.localAddr = *off; | |
356 | soft->getdma.bytes = len; | |
357 | ||
358 | if (mbcs_getdma_start(soft) < 0) { | |
359 | DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n"); | |
360 | rv = -EAGAIN; | |
361 | goto dmaread_exit; | |
362 | } | |
363 | ||
364 | if (wait_event_interruptible(soft->dmaread_queue, | |
365 | atomic_read(&soft->dmaread_done))) { | |
366 | rv = -ERESTARTSYS; | |
367 | goto dmaread_exit; | |
368 | } | |
369 | ||
370 | rv = len; | |
371 | *off += len; | |
372 | ||
373 | dmaread_exit: | |
374 | up(&soft->dmareadlock); | |
375 | ||
376 | return rv; | |
377 | } | |
378 | ||
379 | int mbcs_open(struct inode *ip, struct file *fp) | |
380 | { | |
381 | struct mbcs_soft *soft; | |
382 | int minor; | |
383 | ||
384 | minor = iminor(ip); | |
385 | ||
386 | list_for_each_entry(soft, &soft_list, list) { | |
387 | if (soft->nasid == minor) { | |
388 | fp->private_data = soft->cxdev; | |
389 | return 0; | |
390 | } | |
391 | } | |
392 | ||
393 | return -ENODEV; | |
394 | } | |
395 | ||
9b52523a | 396 | ssize_t mbcs_sram_read(struct file * fp, char __user *buf, size_t len, loff_t * off) |
e1e19747 BL |
397 | { |
398 | struct cx_dev *cx_dev = fp->private_data; | |
399 | struct mbcs_soft *soft = cx_dev->soft; | |
400 | uint64_t hostAddr; | |
401 | int rv = 0; | |
402 | ||
403 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); | |
404 | if (hostAddr == 0) | |
405 | return -ENOMEM; | |
406 | ||
407 | rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off); | |
408 | if (rv < 0) | |
409 | goto exit; | |
410 | ||
411 | if (copy_to_user(buf, (void *)hostAddr, len)) | |
412 | rv = -EFAULT; | |
413 | ||
414 | exit: | |
415 | free_pages(hostAddr, get_order(len)); | |
416 | ||
417 | return rv; | |
418 | } | |
419 | ||
420 | ssize_t | |
9b52523a | 421 | mbcs_sram_write(struct file * fp, const char __user *buf, size_t len, loff_t * off) |
e1e19747 BL |
422 | { |
423 | struct cx_dev *cx_dev = fp->private_data; | |
424 | struct mbcs_soft *soft = cx_dev->soft; | |
425 | uint64_t hostAddr; | |
426 | int rv = 0; | |
427 | ||
428 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); | |
429 | if (hostAddr == 0) | |
430 | return -ENOMEM; | |
431 | ||
432 | if (copy_from_user((void *)hostAddr, buf, len)) { | |
433 | rv = -EFAULT; | |
434 | goto exit; | |
435 | } | |
436 | ||
437 | rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off); | |
438 | ||
439 | exit: | |
440 | free_pages(hostAddr, get_order(len)); | |
441 | ||
442 | return rv; | |
443 | } | |
444 | ||
445 | loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence) | |
446 | { | |
447 | loff_t newpos; | |
448 | ||
449 | switch (whence) { | |
450 | case 0: /* SEEK_SET */ | |
451 | newpos = off; | |
452 | break; | |
453 | ||
454 | case 1: /* SEEK_CUR */ | |
455 | newpos = filp->f_pos + off; | |
456 | break; | |
457 | ||
458 | case 2: /* SEEK_END */ | |
459 | newpos = MBCS_SRAM_SIZE + off; | |
460 | break; | |
461 | ||
462 | default: /* can't happen */ | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | if (newpos < 0) | |
467 | return -EINVAL; | |
468 | ||
469 | filp->f_pos = newpos; | |
470 | ||
471 | return newpos; | |
472 | } | |
473 | ||
474 | static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset) | |
475 | { | |
476 | uint64_t mmr_base; | |
477 | ||
478 | mmr_base = (uint64_t) (soft->mmr_base + offset); | |
479 | ||
480 | return mmr_base; | |
481 | } | |
482 | ||
483 | static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft) | |
484 | { | |
485 | soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START); | |
486 | } | |
487 | ||
488 | static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft) | |
489 | { | |
490 | soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START); | |
491 | } | |
492 | ||
493 | int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma) | |
494 | { | |
495 | struct cx_dev *cx_dev = fp->private_data; | |
496 | struct mbcs_soft *soft = cx_dev->soft; | |
497 | ||
498 | if (vma->vm_pgoff != 0) | |
499 | return -EINVAL; | |
500 | ||
501 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
502 | ||
503 | /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */ | |
504 | if (remap_pfn_range(vma, | |
505 | vma->vm_start, | |
506 | __pa(soft->gscr_addr) >> PAGE_SHIFT, | |
507 | PAGE_SIZE, | |
508 | vma->vm_page_prot)) | |
509 | return -EAGAIN; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | /** | |
515 | * mbcs_completion_intr_handler - Primary completion handler. | |
516 | * @irq: irq | |
517 | * @arg: soft struct for device | |
518 | * @ep: regs | |
519 | * | |
520 | */ | |
521 | static irqreturn_t | |
522 | mbcs_completion_intr_handler(int irq, void *arg, struct pt_regs *ep) | |
523 | { | |
524 | struct mbcs_soft *soft = (struct mbcs_soft *)arg; | |
525 | void *mmr_base; | |
526 | union cm_status cm_status; | |
527 | union cm_control cm_control; | |
528 | ||
529 | mmr_base = soft->mmr_base; | |
530 | cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS); | |
531 | ||
532 | if (cm_status.rd_dma_done) { | |
533 | /* stop dma-read engine, clear status */ | |
534 | cm_control.cm_control_reg = | |
535 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
536 | cm_control.rd_dma_clr = 1; | |
537 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
538 | cm_control.cm_control_reg); | |
539 | atomic_set(&soft->dmaread_done, 1); | |
540 | wake_up(&soft->dmaread_queue); | |
541 | } | |
542 | if (cm_status.wr_dma_done) { | |
543 | /* stop dma-write engine, clear status */ | |
544 | cm_control.cm_control_reg = | |
545 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
546 | cm_control.wr_dma_clr = 1; | |
547 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
548 | cm_control.cm_control_reg); | |
549 | atomic_set(&soft->dmawrite_done, 1); | |
550 | wake_up(&soft->dmawrite_queue); | |
551 | } | |
552 | if (cm_status.alg_done) { | |
553 | /* clear status */ | |
554 | cm_control.cm_control_reg = | |
555 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
556 | cm_control.alg_done_clr = 1; | |
557 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
558 | cm_control.cm_control_reg); | |
559 | atomic_set(&soft->algo_done, 1); | |
560 | wake_up(&soft->algo_queue); | |
561 | } | |
562 | ||
563 | return IRQ_HANDLED; | |
564 | } | |
565 | ||
566 | /** | |
567 | * mbcs_intr_alloc - Allocate interrupts. | |
568 | * @dev: device pointer | |
569 | * | |
570 | */ | |
571 | static int mbcs_intr_alloc(struct cx_dev *dev) | |
572 | { | |
573 | struct sn_irq_info *sn_irq; | |
574 | struct mbcs_soft *soft; | |
575 | struct getdma *getdma; | |
576 | struct putdma *putdma; | |
577 | struct algoblock *algo; | |
578 | ||
579 | soft = dev->soft; | |
580 | getdma = &soft->getdma; | |
581 | putdma = &soft->putdma; | |
582 | algo = &soft->algo; | |
583 | ||
584 | soft->get_sn_irq = NULL; | |
585 | soft->put_sn_irq = NULL; | |
586 | soft->algo_sn_irq = NULL; | |
587 | ||
588 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
589 | if (sn_irq == NULL) | |
590 | return -EAGAIN; | |
591 | soft->get_sn_irq = sn_irq; | |
592 | getdma->intrHostDest = sn_irq->irq_xtalkaddr; | |
593 | getdma->intrVector = sn_irq->irq_irq; | |
594 | if (request_irq(sn_irq->irq_irq, | |
595 | (void *)mbcs_completion_intr_handler, SA_SHIRQ, | |
596 | "MBCS get intr", (void *)soft)) { | |
597 | tiocx_irq_free(soft->get_sn_irq); | |
598 | return -EAGAIN; | |
599 | } | |
600 | ||
601 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
602 | if (sn_irq == NULL) { | |
603 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
604 | tiocx_irq_free(soft->get_sn_irq); | |
605 | return -EAGAIN; | |
606 | } | |
607 | soft->put_sn_irq = sn_irq; | |
608 | putdma->intrHostDest = sn_irq->irq_xtalkaddr; | |
609 | putdma->intrVector = sn_irq->irq_irq; | |
610 | if (request_irq(sn_irq->irq_irq, | |
611 | (void *)mbcs_completion_intr_handler, SA_SHIRQ, | |
612 | "MBCS put intr", (void *)soft)) { | |
613 | tiocx_irq_free(soft->put_sn_irq); | |
614 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
615 | tiocx_irq_free(soft->get_sn_irq); | |
616 | return -EAGAIN; | |
617 | } | |
618 | ||
619 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
620 | if (sn_irq == NULL) { | |
621 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
622 | tiocx_irq_free(soft->put_sn_irq); | |
623 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
624 | tiocx_irq_free(soft->get_sn_irq); | |
625 | return -EAGAIN; | |
626 | } | |
627 | soft->algo_sn_irq = sn_irq; | |
628 | algo->intrHostDest = sn_irq->irq_xtalkaddr; | |
629 | algo->intrVector = sn_irq->irq_irq; | |
630 | if (request_irq(sn_irq->irq_irq, | |
631 | (void *)mbcs_completion_intr_handler, SA_SHIRQ, | |
632 | "MBCS algo intr", (void *)soft)) { | |
633 | tiocx_irq_free(soft->algo_sn_irq); | |
634 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
635 | tiocx_irq_free(soft->put_sn_irq); | |
636 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
637 | tiocx_irq_free(soft->get_sn_irq); | |
638 | return -EAGAIN; | |
639 | } | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | /** | |
645 | * mbcs_intr_dealloc - Remove interrupts. | |
646 | * @dev: device pointer | |
647 | * | |
648 | */ | |
649 | static void mbcs_intr_dealloc(struct cx_dev *dev) | |
650 | { | |
651 | struct mbcs_soft *soft; | |
652 | ||
653 | soft = dev->soft; | |
654 | ||
655 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
656 | tiocx_irq_free(soft->get_sn_irq); | |
657 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
658 | tiocx_irq_free(soft->put_sn_irq); | |
659 | free_irq(soft->algo_sn_irq->irq_irq, soft); | |
660 | tiocx_irq_free(soft->algo_sn_irq); | |
661 | } | |
662 | ||
663 | static inline int mbcs_hw_init(struct mbcs_soft *soft) | |
664 | { | |
665 | void *mmr_base = soft->mmr_base; | |
666 | union cm_control cm_control; | |
667 | union cm_req_timeout cm_req_timeout; | |
668 | uint64_t err_stat; | |
669 | ||
670 | cm_req_timeout.cm_req_timeout_reg = | |
671 | MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT); | |
672 | ||
673 | cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK; | |
674 | MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT, | |
675 | cm_req_timeout.cm_req_timeout_reg); | |
676 | ||
677 | mbcs_gscr_pioaddr_set(soft); | |
678 | mbcs_debug_pioaddr_set(soft); | |
679 | ||
680 | /* clear errors */ | |
681 | err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT); | |
682 | MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat); | |
683 | MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1); | |
684 | ||
685 | /* enable interrupts */ | |
686 | /* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */ | |
687 | MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL); | |
688 | ||
689 | /* arm status regs and clear engines */ | |
690 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
691 | cm_control.rearm_stat_regs = 1; | |
692 | cm_control.alg_clr = 1; | |
693 | cm_control.wr_dma_clr = 1; | |
694 | cm_control.rd_dma_clr = 1; | |
695 | ||
696 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
74880c06 | 701 | static ssize_t show_algo(struct device *dev, struct device_attribute *attr, char *buf) |
e1e19747 BL |
702 | { |
703 | struct cx_dev *cx_dev = to_cx_dev(dev); | |
704 | struct mbcs_soft *soft = cx_dev->soft; | |
705 | uint64_t debug0; | |
706 | ||
707 | /* | |
708 | * By convention, the first debug register contains the | |
709 | * algorithm number and revision. | |
710 | */ | |
711 | debug0 = *(uint64_t *) soft->debug_addr; | |
712 | ||
713 | return sprintf(buf, "0x%lx 0x%lx\n", | |
714 | (debug0 >> 32), (debug0 & 0xffffffff)); | |
715 | } | |
716 | ||
74880c06 | 717 | static ssize_t store_algo(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
e1e19747 BL |
718 | { |
719 | int n; | |
720 | struct cx_dev *cx_dev = to_cx_dev(dev); | |
721 | struct mbcs_soft *soft = cx_dev->soft; | |
722 | ||
723 | if (count <= 0) | |
724 | return 0; | |
725 | ||
726 | n = simple_strtoul(buf, NULL, 0); | |
727 | ||
728 | if (n == 1) { | |
729 | mbcs_algo_start(soft); | |
730 | if (wait_event_interruptible(soft->algo_queue, | |
731 | atomic_read(&soft->algo_done))) | |
732 | return -ERESTARTSYS; | |
733 | } | |
734 | ||
735 | return count; | |
736 | } | |
737 | ||
738 | DEVICE_ATTR(algo, 0644, show_algo, store_algo); | |
739 | ||
740 | /** | |
741 | * mbcs_probe - Initialize for device | |
742 | * @dev: device pointer | |
743 | * @device_id: id table pointer | |
744 | * | |
745 | */ | |
746 | static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id) | |
747 | { | |
748 | struct mbcs_soft *soft; | |
749 | ||
750 | dev->soft = NULL; | |
751 | ||
82ca76b6 | 752 | soft = kzalloc(sizeof(struct mbcs_soft), GFP_KERNEL); |
e1e19747 BL |
753 | if (soft == NULL) |
754 | return -ENOMEM; | |
755 | ||
756 | soft->nasid = dev->cx_id.nasid; | |
757 | list_add(&soft->list, &soft_list); | |
758 | soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid); | |
759 | dev->soft = soft; | |
760 | soft->cxdev = dev; | |
761 | ||
762 | init_waitqueue_head(&soft->dmawrite_queue); | |
763 | init_waitqueue_head(&soft->dmaread_queue); | |
764 | init_waitqueue_head(&soft->algo_queue); | |
765 | ||
766 | init_MUTEX(&soft->dmawritelock); | |
767 | init_MUTEX(&soft->dmareadlock); | |
768 | init_MUTEX(&soft->algolock); | |
769 | ||
770 | mbcs_getdma_init(&soft->getdma); | |
771 | mbcs_putdma_init(&soft->putdma); | |
772 | mbcs_algo_init(&soft->algo); | |
773 | ||
774 | mbcs_hw_init(soft); | |
775 | ||
776 | /* Allocate interrupts */ | |
777 | mbcs_intr_alloc(dev); | |
778 | ||
779 | device_create_file(&dev->dev, &dev_attr_algo); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int mbcs_remove(struct cx_dev *dev) | |
785 | { | |
786 | if (dev->soft) { | |
787 | mbcs_intr_dealloc(dev); | |
788 | kfree(dev->soft); | |
789 | } | |
790 | ||
791 | device_remove_file(&dev->dev, &dev_attr_algo); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | const struct cx_device_id __devinitdata mbcs_id_table[] = { | |
797 | { | |
798 | .part_num = MBCS_PART_NUM, | |
799 | .mfg_num = MBCS_MFG_NUM, | |
800 | }, | |
801 | { | |
802 | .part_num = MBCS_PART_NUM_ALG0, | |
803 | .mfg_num = MBCS_MFG_NUM, | |
804 | }, | |
805 | {0, 0} | |
806 | }; | |
807 | ||
808 | MODULE_DEVICE_TABLE(cx, mbcs_id_table); | |
809 | ||
810 | struct cx_drv mbcs_driver = { | |
811 | .name = DEVICE_NAME, | |
812 | .id_table = mbcs_id_table, | |
813 | .probe = mbcs_probe, | |
814 | .remove = mbcs_remove, | |
815 | }; | |
816 | ||
817 | static void __exit mbcs_exit(void) | |
818 | { | |
819 | int rv; | |
820 | ||
821 | rv = unregister_chrdev(mbcs_major, DEVICE_NAME); | |
822 | if (rv < 0) | |
823 | DBG(KERN_ALERT "Error in unregister_chrdev: %d\n", rv); | |
824 | ||
825 | cx_driver_unregister(&mbcs_driver); | |
826 | } | |
827 | ||
828 | static int __init mbcs_init(void) | |
829 | { | |
830 | int rv; | |
831 | ||
96f339c6 GE |
832 | if (!ia64_platform_is("sn2")) |
833 | return -ENODEV; | |
834 | ||
e1e19747 BL |
835 | // Put driver into chrdevs[]. Get major number. |
836 | rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops); | |
837 | if (rv < 0) { | |
838 | DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv); | |
839 | return rv; | |
840 | } | |
841 | mbcs_major = rv; | |
842 | ||
843 | return cx_driver_register(&mbcs_driver); | |
844 | } | |
845 | ||
846 | module_init(mbcs_init); | |
847 | module_exit(mbcs_exit); | |
848 | ||
849 | MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>"); | |
850 | MODULE_DESCRIPTION("Driver for MOATB Core Services"); | |
851 | MODULE_LICENSE("GPL"); |