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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/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/kernel.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 <linux/mutex.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/pagemap.h> | |
30 | #include <asm/io.h> | |
31 | #include <linux/uaccess.h> | |
32 | #include <asm/pgtable.h> | |
33 | #include <asm/sn/addrs.h> | |
34 | #include <asm/sn/intr.h> | |
35 | #include <asm/sn/tiocx.h> | |
36 | #include "mbcs.h" | |
37 | ||
38 | #define MBCS_DEBUG 0 | |
39 | #if MBCS_DEBUG | |
40 | #define DBG(fmt...) printk(KERN_ALERT fmt) | |
41 | #else | |
42 | #define DBG(fmt...) | |
43 | #endif | |
44 | static DEFINE_MUTEX(mbcs_mutex); | |
45 | static int mbcs_major; | |
46 | ||
47 | static LIST_HEAD(soft_list); | |
48 | ||
49 | /* | |
50 | * file operations | |
51 | */ | |
52 | static const struct file_operations mbcs_ops = { | |
53 | .open = mbcs_open, | |
54 | .llseek = mbcs_sram_llseek, | |
55 | .read = mbcs_sram_read, | |
56 | .write = mbcs_sram_write, | |
57 | .mmap = mbcs_gscr_mmap, | |
58 | }; | |
59 | ||
60 | struct mbcs_callback_arg { | |
61 | int minor; | |
62 | struct cx_dev *cx_dev; | |
63 | }; | |
64 | ||
65 | static inline void mbcs_getdma_init(struct getdma *gdma) | |
66 | { | |
67 | memset(gdma, 0, sizeof(struct getdma)); | |
68 | gdma->DoneIntEnable = 1; | |
69 | } | |
70 | ||
71 | static inline void mbcs_putdma_init(struct putdma *pdma) | |
72 | { | |
73 | memset(pdma, 0, sizeof(struct putdma)); | |
74 | pdma->DoneIntEnable = 1; | |
75 | } | |
76 | ||
77 | static inline void mbcs_algo_init(struct algoblock *algo_soft) | |
78 | { | |
79 | memset(algo_soft, 0, sizeof(struct algoblock)); | |
80 | } | |
81 | ||
82 | static inline void mbcs_getdma_set(void *mmr, | |
83 | uint64_t hostAddr, | |
84 | uint64_t localAddr, | |
85 | uint64_t localRamSel, | |
86 | uint64_t numPkts, | |
87 | uint64_t amoEnable, | |
88 | uint64_t intrEnable, | |
89 | uint64_t peerIO, | |
90 | uint64_t amoHostDest, | |
91 | uint64_t amoModType, uint64_t intrHostDest, | |
92 | uint64_t intrVector) | |
93 | { | |
94 | union dma_control rdma_control; | |
95 | union dma_amo_dest amo_dest; | |
96 | union intr_dest intr_dest; | |
97 | union dma_localaddr local_addr; | |
98 | union dma_hostaddr host_addr; | |
99 | ||
100 | rdma_control.dma_control_reg = 0; | |
101 | amo_dest.dma_amo_dest_reg = 0; | |
102 | intr_dest.intr_dest_reg = 0; | |
103 | local_addr.dma_localaddr_reg = 0; | |
104 | host_addr.dma_hostaddr_reg = 0; | |
105 | ||
106 | host_addr.dma_sys_addr = hostAddr; | |
107 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); | |
108 | ||
109 | local_addr.dma_ram_addr = localAddr; | |
110 | local_addr.dma_ram_sel = localRamSel; | |
111 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); | |
112 | ||
113 | rdma_control.dma_op_length = numPkts; | |
114 | rdma_control.done_amo_en = amoEnable; | |
115 | rdma_control.done_int_en = intrEnable; | |
116 | rdma_control.pio_mem_n = peerIO; | |
117 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg); | |
118 | ||
119 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
120 | amo_dest.dma_amo_mod_type = amoModType; | |
121 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
122 | ||
123 | intr_dest.address = intrHostDest; | |
124 | intr_dest.int_vector = intrVector; | |
125 | MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg); | |
126 | ||
127 | } | |
128 | ||
129 | static inline void mbcs_putdma_set(void *mmr, | |
130 | uint64_t hostAddr, | |
131 | uint64_t localAddr, | |
132 | uint64_t localRamSel, | |
133 | uint64_t numPkts, | |
134 | uint64_t amoEnable, | |
135 | uint64_t intrEnable, | |
136 | uint64_t peerIO, | |
137 | uint64_t amoHostDest, | |
138 | uint64_t amoModType, | |
139 | uint64_t intrHostDest, uint64_t intrVector) | |
140 | { | |
141 | union dma_control wdma_control; | |
142 | union dma_amo_dest amo_dest; | |
143 | union intr_dest intr_dest; | |
144 | union dma_localaddr local_addr; | |
145 | union dma_hostaddr host_addr; | |
146 | ||
147 | wdma_control.dma_control_reg = 0; | |
148 | amo_dest.dma_amo_dest_reg = 0; | |
149 | intr_dest.intr_dest_reg = 0; | |
150 | local_addr.dma_localaddr_reg = 0; | |
151 | host_addr.dma_hostaddr_reg = 0; | |
152 | ||
153 | host_addr.dma_sys_addr = hostAddr; | |
154 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg); | |
155 | ||
156 | local_addr.dma_ram_addr = localAddr; | |
157 | local_addr.dma_ram_sel = localRamSel; | |
158 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg); | |
159 | ||
160 | wdma_control.dma_op_length = numPkts; | |
161 | wdma_control.done_amo_en = amoEnable; | |
162 | wdma_control.done_int_en = intrEnable; | |
163 | wdma_control.pio_mem_n = peerIO; | |
164 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg); | |
165 | ||
166 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
167 | amo_dest.dma_amo_mod_type = amoModType; | |
168 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
169 | ||
170 | intr_dest.address = intrHostDest; | |
171 | intr_dest.int_vector = intrVector; | |
172 | MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg); | |
173 | ||
174 | } | |
175 | ||
176 | static inline void mbcs_algo_set(void *mmr, | |
177 | uint64_t amoHostDest, | |
178 | uint64_t amoModType, | |
179 | uint64_t intrHostDest, | |
180 | uint64_t intrVector, uint64_t algoStepCount) | |
181 | { | |
182 | union dma_amo_dest amo_dest; | |
183 | union intr_dest intr_dest; | |
184 | union algo_step step; | |
185 | ||
186 | step.algo_step_reg = 0; | |
187 | intr_dest.intr_dest_reg = 0; | |
188 | amo_dest.dma_amo_dest_reg = 0; | |
189 | ||
190 | amo_dest.dma_amo_sys_addr = amoHostDest; | |
191 | amo_dest.dma_amo_mod_type = amoModType; | |
192 | MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg); | |
193 | ||
194 | intr_dest.address = intrHostDest; | |
195 | intr_dest.int_vector = intrVector; | |
196 | MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg); | |
197 | ||
198 | step.alg_step_cnt = algoStepCount; | |
199 | MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg); | |
200 | } | |
201 | ||
202 | static inline int mbcs_getdma_start(struct mbcs_soft *soft) | |
203 | { | |
204 | void *mmr_base; | |
205 | struct getdma *gdma; | |
206 | uint64_t numPkts; | |
207 | union cm_control cm_control; | |
208 | ||
209 | mmr_base = soft->mmr_base; | |
210 | gdma = &soft->getdma; | |
211 | ||
212 | /* check that host address got setup */ | |
213 | if (!gdma->hostAddr) | |
214 | return -1; | |
215 | ||
216 | numPkts = | |
217 | (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; | |
218 | ||
219 | /* program engine */ | |
220 | mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr), | |
221 | gdma->localAddr, | |
222 | (gdma->localAddr < MB2) ? 0 : | |
223 | (gdma->localAddr < MB4) ? 1 : | |
224 | (gdma->localAddr < MB6) ? 2 : 3, | |
225 | numPkts, | |
226 | gdma->DoneAmoEnable, | |
227 | gdma->DoneIntEnable, | |
228 | gdma->peerIO, | |
229 | gdma->amoHostDest, | |
230 | gdma->amoModType, | |
231 | gdma->intrHostDest, gdma->intrVector); | |
232 | ||
233 | /* start engine */ | |
234 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
235 | cm_control.rd_dma_go = 1; | |
236 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
237 | ||
238 | return 0; | |
239 | ||
240 | } | |
241 | ||
242 | static inline int mbcs_putdma_start(struct mbcs_soft *soft) | |
243 | { | |
244 | void *mmr_base; | |
245 | struct putdma *pdma; | |
246 | uint64_t numPkts; | |
247 | union cm_control cm_control; | |
248 | ||
249 | mmr_base = soft->mmr_base; | |
250 | pdma = &soft->putdma; | |
251 | ||
252 | /* check that host address got setup */ | |
253 | if (!pdma->hostAddr) | |
254 | return -1; | |
255 | ||
256 | numPkts = | |
257 | (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE; | |
258 | ||
259 | /* program engine */ | |
260 | mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr), | |
261 | pdma->localAddr, | |
262 | (pdma->localAddr < MB2) ? 0 : | |
263 | (pdma->localAddr < MB4) ? 1 : | |
264 | (pdma->localAddr < MB6) ? 2 : 3, | |
265 | numPkts, | |
266 | pdma->DoneAmoEnable, | |
267 | pdma->DoneIntEnable, | |
268 | pdma->peerIO, | |
269 | pdma->amoHostDest, | |
270 | pdma->amoModType, | |
271 | pdma->intrHostDest, pdma->intrVector); | |
272 | ||
273 | /* start engine */ | |
274 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
275 | cm_control.wr_dma_go = 1; | |
276 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
277 | ||
278 | return 0; | |
279 | ||
280 | } | |
281 | ||
282 | static inline int mbcs_algo_start(struct mbcs_soft *soft) | |
283 | { | |
284 | struct algoblock *algo_soft = &soft->algo; | |
285 | void *mmr_base = soft->mmr_base; | |
286 | union cm_control cm_control; | |
287 | ||
288 | if (mutex_lock_interruptible(&soft->algolock)) | |
289 | return -ERESTARTSYS; | |
290 | ||
291 | atomic_set(&soft->algo_done, 0); | |
292 | ||
293 | mbcs_algo_set(mmr_base, | |
294 | algo_soft->amoHostDest, | |
295 | algo_soft->amoModType, | |
296 | algo_soft->intrHostDest, | |
297 | algo_soft->intrVector, algo_soft->algoStepCount); | |
298 | ||
299 | /* start algorithm */ | |
300 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
301 | cm_control.alg_done_int_en = 1; | |
302 | cm_control.alg_go = 1; | |
303 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
304 | ||
305 | mutex_unlock(&soft->algolock); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static inline ssize_t | |
311 | do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr, | |
312 | size_t len, loff_t * off) | |
313 | { | |
314 | int rv = 0; | |
315 | ||
316 | if (mutex_lock_interruptible(&soft->dmawritelock)) | |
317 | return -ERESTARTSYS; | |
318 | ||
319 | atomic_set(&soft->dmawrite_done, 0); | |
320 | ||
321 | soft->putdma.hostAddr = hostAddr; | |
322 | soft->putdma.localAddr = *off; | |
323 | soft->putdma.bytes = len; | |
324 | ||
325 | if (mbcs_putdma_start(soft) < 0) { | |
326 | DBG(KERN_ALERT "do_mbcs_sram_dmawrite: " | |
327 | "mbcs_putdma_start failed\n"); | |
328 | rv = -EAGAIN; | |
329 | goto dmawrite_exit; | |
330 | } | |
331 | ||
332 | if (wait_event_interruptible(soft->dmawrite_queue, | |
333 | atomic_read(&soft->dmawrite_done))) { | |
334 | rv = -ERESTARTSYS; | |
335 | goto dmawrite_exit; | |
336 | } | |
337 | ||
338 | rv = len; | |
339 | *off += len; | |
340 | ||
341 | dmawrite_exit: | |
342 | mutex_unlock(&soft->dmawritelock); | |
343 | ||
344 | return rv; | |
345 | } | |
346 | ||
347 | static inline ssize_t | |
348 | do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr, | |
349 | size_t len, loff_t * off) | |
350 | { | |
351 | int rv = 0; | |
352 | ||
353 | if (mutex_lock_interruptible(&soft->dmareadlock)) | |
354 | return -ERESTARTSYS; | |
355 | ||
356 | atomic_set(&soft->dmawrite_done, 0); | |
357 | ||
358 | soft->getdma.hostAddr = hostAddr; | |
359 | soft->getdma.localAddr = *off; | |
360 | soft->getdma.bytes = len; | |
361 | ||
362 | if (mbcs_getdma_start(soft) < 0) { | |
363 | DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n"); | |
364 | rv = -EAGAIN; | |
365 | goto dmaread_exit; | |
366 | } | |
367 | ||
368 | if (wait_event_interruptible(soft->dmaread_queue, | |
369 | atomic_read(&soft->dmaread_done))) { | |
370 | rv = -ERESTARTSYS; | |
371 | goto dmaread_exit; | |
372 | } | |
373 | ||
374 | rv = len; | |
375 | *off += len; | |
376 | ||
377 | dmaread_exit: | |
378 | mutex_unlock(&soft->dmareadlock); | |
379 | ||
380 | return rv; | |
381 | } | |
382 | ||
383 | static int mbcs_open(struct inode *ip, struct file *fp) | |
384 | { | |
385 | struct mbcs_soft *soft; | |
386 | int minor; | |
387 | ||
388 | mutex_lock(&mbcs_mutex); | |
389 | minor = iminor(ip); | |
390 | ||
391 | /* Nothing protects access to this list... */ | |
392 | list_for_each_entry(soft, &soft_list, list) { | |
393 | if (soft->nasid == minor) { | |
394 | fp->private_data = soft->cxdev; | |
395 | mutex_unlock(&mbcs_mutex); | |
396 | return 0; | |
397 | } | |
398 | } | |
399 | ||
400 | mutex_unlock(&mbcs_mutex); | |
401 | return -ENODEV; | |
402 | } | |
403 | ||
404 | static ssize_t mbcs_sram_read(struct file * fp, char __user *buf, size_t len, loff_t * off) | |
405 | { | |
406 | struct cx_dev *cx_dev = fp->private_data; | |
407 | struct mbcs_soft *soft = cx_dev->soft; | |
408 | uint64_t hostAddr; | |
409 | int rv = 0; | |
410 | ||
411 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); | |
412 | if (hostAddr == 0) | |
413 | return -ENOMEM; | |
414 | ||
415 | rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off); | |
416 | if (rv < 0) | |
417 | goto exit; | |
418 | ||
419 | if (copy_to_user(buf, (void *)hostAddr, len)) | |
420 | rv = -EFAULT; | |
421 | ||
422 | exit: | |
423 | free_pages(hostAddr, get_order(len)); | |
424 | ||
425 | return rv; | |
426 | } | |
427 | ||
428 | static ssize_t | |
429 | mbcs_sram_write(struct file * fp, const char __user *buf, size_t len, loff_t * off) | |
430 | { | |
431 | struct cx_dev *cx_dev = fp->private_data; | |
432 | struct mbcs_soft *soft = cx_dev->soft; | |
433 | uint64_t hostAddr; | |
434 | int rv = 0; | |
435 | ||
436 | hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len)); | |
437 | if (hostAddr == 0) | |
438 | return -ENOMEM; | |
439 | ||
440 | if (copy_from_user((void *)hostAddr, buf, len)) { | |
441 | rv = -EFAULT; | |
442 | goto exit; | |
443 | } | |
444 | ||
445 | rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off); | |
446 | ||
447 | exit: | |
448 | free_pages(hostAddr, get_order(len)); | |
449 | ||
450 | return rv; | |
451 | } | |
452 | ||
453 | static loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence) | |
454 | { | |
455 | return generic_file_llseek_size(filp, off, whence, MAX_LFS_FILESIZE, | |
456 | MBCS_SRAM_SIZE); | |
457 | } | |
458 | ||
459 | static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset) | |
460 | { | |
461 | uint64_t mmr_base; | |
462 | ||
463 | mmr_base = (uint64_t) (soft->mmr_base + offset); | |
464 | ||
465 | return mmr_base; | |
466 | } | |
467 | ||
468 | static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft) | |
469 | { | |
470 | soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START); | |
471 | } | |
472 | ||
473 | static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft) | |
474 | { | |
475 | soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START); | |
476 | } | |
477 | ||
478 | static int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma) | |
479 | { | |
480 | struct cx_dev *cx_dev = fp->private_data; | |
481 | struct mbcs_soft *soft = cx_dev->soft; | |
482 | ||
483 | if (vma->vm_pgoff != 0) | |
484 | return -EINVAL; | |
485 | ||
486 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
487 | ||
488 | /* Remap-pfn-range will mark the range VM_IO */ | |
489 | if (remap_pfn_range(vma, | |
490 | vma->vm_start, | |
491 | __pa(soft->gscr_addr) >> PAGE_SHIFT, | |
492 | PAGE_SIZE, | |
493 | vma->vm_page_prot)) | |
494 | return -EAGAIN; | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
499 | /** | |
500 | * mbcs_completion_intr_handler - Primary completion handler. | |
501 | * @irq: irq | |
502 | * @arg: soft struct for device | |
503 | * | |
504 | */ | |
505 | static irqreturn_t | |
506 | mbcs_completion_intr_handler(int irq, void *arg) | |
507 | { | |
508 | struct mbcs_soft *soft = (struct mbcs_soft *)arg; | |
509 | void *mmr_base; | |
510 | union cm_status cm_status; | |
511 | union cm_control cm_control; | |
512 | ||
513 | mmr_base = soft->mmr_base; | |
514 | cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS); | |
515 | ||
516 | if (cm_status.rd_dma_done) { | |
517 | /* stop dma-read engine, clear status */ | |
518 | cm_control.cm_control_reg = | |
519 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
520 | cm_control.rd_dma_clr = 1; | |
521 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
522 | cm_control.cm_control_reg); | |
523 | atomic_set(&soft->dmaread_done, 1); | |
524 | wake_up(&soft->dmaread_queue); | |
525 | } | |
526 | if (cm_status.wr_dma_done) { | |
527 | /* stop dma-write engine, clear status */ | |
528 | cm_control.cm_control_reg = | |
529 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
530 | cm_control.wr_dma_clr = 1; | |
531 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
532 | cm_control.cm_control_reg); | |
533 | atomic_set(&soft->dmawrite_done, 1); | |
534 | wake_up(&soft->dmawrite_queue); | |
535 | } | |
536 | if (cm_status.alg_done) { | |
537 | /* clear status */ | |
538 | cm_control.cm_control_reg = | |
539 | MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
540 | cm_control.alg_done_clr = 1; | |
541 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, | |
542 | cm_control.cm_control_reg); | |
543 | atomic_set(&soft->algo_done, 1); | |
544 | wake_up(&soft->algo_queue); | |
545 | } | |
546 | ||
547 | return IRQ_HANDLED; | |
548 | } | |
549 | ||
550 | /** | |
551 | * mbcs_intr_alloc - Allocate interrupts. | |
552 | * @dev: device pointer | |
553 | * | |
554 | */ | |
555 | static int mbcs_intr_alloc(struct cx_dev *dev) | |
556 | { | |
557 | struct sn_irq_info *sn_irq; | |
558 | struct mbcs_soft *soft; | |
559 | struct getdma *getdma; | |
560 | struct putdma *putdma; | |
561 | struct algoblock *algo; | |
562 | ||
563 | soft = dev->soft; | |
564 | getdma = &soft->getdma; | |
565 | putdma = &soft->putdma; | |
566 | algo = &soft->algo; | |
567 | ||
568 | soft->get_sn_irq = NULL; | |
569 | soft->put_sn_irq = NULL; | |
570 | soft->algo_sn_irq = NULL; | |
571 | ||
572 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
573 | if (sn_irq == NULL) | |
574 | return -EAGAIN; | |
575 | soft->get_sn_irq = sn_irq; | |
576 | getdma->intrHostDest = sn_irq->irq_xtalkaddr; | |
577 | getdma->intrVector = sn_irq->irq_irq; | |
578 | if (request_irq(sn_irq->irq_irq, | |
579 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, | |
580 | "MBCS get intr", (void *)soft)) { | |
581 | tiocx_irq_free(soft->get_sn_irq); | |
582 | return -EAGAIN; | |
583 | } | |
584 | ||
585 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
586 | if (sn_irq == NULL) { | |
587 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
588 | tiocx_irq_free(soft->get_sn_irq); | |
589 | return -EAGAIN; | |
590 | } | |
591 | soft->put_sn_irq = sn_irq; | |
592 | putdma->intrHostDest = sn_irq->irq_xtalkaddr; | |
593 | putdma->intrVector = sn_irq->irq_irq; | |
594 | if (request_irq(sn_irq->irq_irq, | |
595 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, | |
596 | "MBCS put intr", (void *)soft)) { | |
597 | tiocx_irq_free(soft->put_sn_irq); | |
598 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
599 | tiocx_irq_free(soft->get_sn_irq); | |
600 | return -EAGAIN; | |
601 | } | |
602 | ||
603 | sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1); | |
604 | if (sn_irq == NULL) { | |
605 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
606 | tiocx_irq_free(soft->put_sn_irq); | |
607 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
608 | tiocx_irq_free(soft->get_sn_irq); | |
609 | return -EAGAIN; | |
610 | } | |
611 | soft->algo_sn_irq = sn_irq; | |
612 | algo->intrHostDest = sn_irq->irq_xtalkaddr; | |
613 | algo->intrVector = sn_irq->irq_irq; | |
614 | if (request_irq(sn_irq->irq_irq, | |
615 | (void *)mbcs_completion_intr_handler, IRQF_SHARED, | |
616 | "MBCS algo intr", (void *)soft)) { | |
617 | tiocx_irq_free(soft->algo_sn_irq); | |
618 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
619 | tiocx_irq_free(soft->put_sn_irq); | |
620 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
621 | tiocx_irq_free(soft->get_sn_irq); | |
622 | return -EAGAIN; | |
623 | } | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | /** | |
629 | * mbcs_intr_dealloc - Remove interrupts. | |
630 | * @dev: device pointer | |
631 | * | |
632 | */ | |
633 | static void mbcs_intr_dealloc(struct cx_dev *dev) | |
634 | { | |
635 | struct mbcs_soft *soft; | |
636 | ||
637 | soft = dev->soft; | |
638 | ||
639 | free_irq(soft->get_sn_irq->irq_irq, soft); | |
640 | tiocx_irq_free(soft->get_sn_irq); | |
641 | free_irq(soft->put_sn_irq->irq_irq, soft); | |
642 | tiocx_irq_free(soft->put_sn_irq); | |
643 | free_irq(soft->algo_sn_irq->irq_irq, soft); | |
644 | tiocx_irq_free(soft->algo_sn_irq); | |
645 | } | |
646 | ||
647 | static inline int mbcs_hw_init(struct mbcs_soft *soft) | |
648 | { | |
649 | void *mmr_base = soft->mmr_base; | |
650 | union cm_control cm_control; | |
651 | union cm_req_timeout cm_req_timeout; | |
652 | uint64_t err_stat; | |
653 | ||
654 | cm_req_timeout.cm_req_timeout_reg = | |
655 | MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT); | |
656 | ||
657 | cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK; | |
658 | MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT, | |
659 | cm_req_timeout.cm_req_timeout_reg); | |
660 | ||
661 | mbcs_gscr_pioaddr_set(soft); | |
662 | mbcs_debug_pioaddr_set(soft); | |
663 | ||
664 | /* clear errors */ | |
665 | err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT); | |
666 | MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat); | |
667 | MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1); | |
668 | ||
669 | /* enable interrupts */ | |
670 | /* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */ | |
671 | MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL); | |
672 | ||
673 | /* arm status regs and clear engines */ | |
674 | cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL); | |
675 | cm_control.rearm_stat_regs = 1; | |
676 | cm_control.alg_clr = 1; | |
677 | cm_control.wr_dma_clr = 1; | |
678 | cm_control.rd_dma_clr = 1; | |
679 | ||
680 | MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg); | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static ssize_t show_algo(struct device *dev, struct device_attribute *attr, char *buf) | |
686 | { | |
687 | struct cx_dev *cx_dev = to_cx_dev(dev); | |
688 | struct mbcs_soft *soft = cx_dev->soft; | |
689 | uint64_t debug0; | |
690 | ||
691 | /* | |
692 | * By convention, the first debug register contains the | |
693 | * algorithm number and revision. | |
694 | */ | |
695 | debug0 = *(uint64_t *) soft->debug_addr; | |
696 | ||
697 | return sprintf(buf, "0x%x 0x%x\n", | |
698 | upper_32_bits(debug0), lower_32_bits(debug0)); | |
699 | } | |
700 | ||
701 | static ssize_t store_algo(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) | |
702 | { | |
703 | int n; | |
704 | struct cx_dev *cx_dev = to_cx_dev(dev); | |
705 | struct mbcs_soft *soft = cx_dev->soft; | |
706 | ||
707 | if (count <= 0) | |
708 | return 0; | |
709 | ||
710 | n = simple_strtoul(buf, NULL, 0); | |
711 | ||
712 | if (n == 1) { | |
713 | mbcs_algo_start(soft); | |
714 | if (wait_event_interruptible(soft->algo_queue, | |
715 | atomic_read(&soft->algo_done))) | |
716 | return -ERESTARTSYS; | |
717 | } | |
718 | ||
719 | return count; | |
720 | } | |
721 | ||
722 | DEVICE_ATTR(algo, 0644, show_algo, store_algo); | |
723 | ||
724 | /** | |
725 | * mbcs_probe - Initialize for device | |
726 | * @dev: device pointer | |
727 | * @device_id: id table pointer | |
728 | * | |
729 | */ | |
730 | static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id) | |
731 | { | |
732 | struct mbcs_soft *soft; | |
733 | ||
734 | dev->soft = NULL; | |
735 | ||
736 | soft = kzalloc(sizeof(struct mbcs_soft), GFP_KERNEL); | |
737 | if (soft == NULL) | |
738 | return -ENOMEM; | |
739 | ||
740 | soft->nasid = dev->cx_id.nasid; | |
741 | list_add(&soft->list, &soft_list); | |
742 | soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid); | |
743 | dev->soft = soft; | |
744 | soft->cxdev = dev; | |
745 | ||
746 | init_waitqueue_head(&soft->dmawrite_queue); | |
747 | init_waitqueue_head(&soft->dmaread_queue); | |
748 | init_waitqueue_head(&soft->algo_queue); | |
749 | ||
750 | mutex_init(&soft->dmawritelock); | |
751 | mutex_init(&soft->dmareadlock); | |
752 | mutex_init(&soft->algolock); | |
753 | ||
754 | mbcs_getdma_init(&soft->getdma); | |
755 | mbcs_putdma_init(&soft->putdma); | |
756 | mbcs_algo_init(&soft->algo); | |
757 | ||
758 | mbcs_hw_init(soft); | |
759 | ||
760 | /* Allocate interrupts */ | |
761 | mbcs_intr_alloc(dev); | |
762 | ||
763 | device_create_file(&dev->dev, &dev_attr_algo); | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | static int mbcs_remove(struct cx_dev *dev) | |
769 | { | |
770 | if (dev->soft) { | |
771 | mbcs_intr_dealloc(dev); | |
772 | kfree(dev->soft); | |
773 | } | |
774 | ||
775 | device_remove_file(&dev->dev, &dev_attr_algo); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | static const struct cx_device_id mbcs_id_table[] = { | |
781 | { | |
782 | .part_num = MBCS_PART_NUM, | |
783 | .mfg_num = MBCS_MFG_NUM, | |
784 | }, | |
785 | { | |
786 | .part_num = MBCS_PART_NUM_ALG0, | |
787 | .mfg_num = MBCS_MFG_NUM, | |
788 | }, | |
789 | {0, 0} | |
790 | }; | |
791 | ||
792 | MODULE_DEVICE_TABLE(cx, mbcs_id_table); | |
793 | ||
794 | static struct cx_drv mbcs_driver = { | |
795 | .name = DEVICE_NAME, | |
796 | .id_table = mbcs_id_table, | |
797 | .probe = mbcs_probe, | |
798 | .remove = mbcs_remove, | |
799 | }; | |
800 | ||
801 | static void __exit mbcs_exit(void) | |
802 | { | |
803 | unregister_chrdev(mbcs_major, DEVICE_NAME); | |
804 | cx_driver_unregister(&mbcs_driver); | |
805 | } | |
806 | ||
807 | static int __init mbcs_init(void) | |
808 | { | |
809 | int rv; | |
810 | ||
811 | if (!ia64_platform_is("sn2")) | |
812 | return -ENODEV; | |
813 | ||
814 | // Put driver into chrdevs[]. Get major number. | |
815 | rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops); | |
816 | if (rv < 0) { | |
817 | DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv); | |
818 | return rv; | |
819 | } | |
820 | mbcs_major = rv; | |
821 | ||
822 | return cx_driver_register(&mbcs_driver); | |
823 | } | |
824 | ||
825 | module_init(mbcs_init); | |
826 | module_exit(mbcs_exit); | |
827 | ||
828 | MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>"); | |
829 | MODULE_DESCRIPTION("Driver for MOATB Core Services"); | |
830 | MODULE_LICENSE("GPL"); |