Commit | Line | Data |
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c2110923 DW |
1 | /* |
2 | * offload engine driver for the Intel Xscale series of i/o processors | |
3 | * Copyright © 2006, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
c2110923 DW |
14 | */ |
15 | ||
16 | /* | |
17 | * This driver supports the asynchrounous DMA copy and RAID engines available | |
18 | * on the Intel Xscale(R) family of I/O Processors (IOP 32x, 33x, 134x) | |
19 | */ | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
c2110923 DW |
23 | #include <linux/delay.h> |
24 | #include <linux/dma-mapping.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/memory.h> | |
29 | #include <linux/ioport.h> | |
f6dbf651 | 30 | #include <linux/raid/pq.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
c2110923 | 32 | |
a09e64fb | 33 | #include <mach/adma.h> |
c2110923 | 34 | |
d2ebfb33 RKAL |
35 | #include "dmaengine.h" |
36 | ||
c2110923 DW |
37 | #define to_iop_adma_chan(chan) container_of(chan, struct iop_adma_chan, common) |
38 | #define to_iop_adma_device(dev) \ | |
39 | container_of(dev, struct iop_adma_device, common) | |
40 | #define tx_to_iop_adma_slot(tx) \ | |
41 | container_of(tx, struct iop_adma_desc_slot, async_tx) | |
42 | ||
43 | /** | |
44 | * iop_adma_free_slots - flags descriptor slots for reuse | |
45 | * @slot: Slot to free | |
46 | * Caller must hold &iop_chan->lock while calling this function | |
47 | */ | |
48 | static void iop_adma_free_slots(struct iop_adma_desc_slot *slot) | |
49 | { | |
50 | int stride = slot->slots_per_op; | |
51 | ||
52 | while (stride--) { | |
53 | slot->slots_per_op = 0; | |
54 | slot = list_entry(slot->slot_node.next, | |
55 | struct iop_adma_desc_slot, | |
56 | slot_node); | |
57 | } | |
58 | } | |
59 | ||
60 | static dma_cookie_t | |
61 | iop_adma_run_tx_complete_actions(struct iop_adma_desc_slot *desc, | |
62 | struct iop_adma_chan *iop_chan, dma_cookie_t cookie) | |
63 | { | |
507fbec4 DW |
64 | struct dma_async_tx_descriptor *tx = &desc->async_tx; |
65 | ||
66 | BUG_ON(tx->cookie < 0); | |
67 | if (tx->cookie > 0) { | |
68 | cookie = tx->cookie; | |
69 | tx->cookie = 0; | |
c2110923 DW |
70 | |
71 | /* call the callback (must not sleep or submit new | |
72 | * operations to this channel) | |
73 | */ | |
507fbec4 DW |
74 | if (tx->callback) |
75 | tx->callback(tx->callback_param); | |
c2110923 | 76 | |
d38a8c62 | 77 | dma_descriptor_unmap(tx); |
54f8d501 BZ |
78 | if (desc->group_head) |
79 | desc->group_head = NULL; | |
c2110923 DW |
80 | } |
81 | ||
82 | /* run dependent operations */ | |
507fbec4 | 83 | dma_run_dependencies(tx); |
c2110923 DW |
84 | |
85 | return cookie; | |
86 | } | |
87 | ||
88 | static int | |
89 | iop_adma_clean_slot(struct iop_adma_desc_slot *desc, | |
90 | struct iop_adma_chan *iop_chan) | |
91 | { | |
92 | /* the client is allowed to attach dependent operations | |
93 | * until 'ack' is set | |
94 | */ | |
636bdeaa | 95 | if (!async_tx_test_ack(&desc->async_tx)) |
c2110923 DW |
96 | return 0; |
97 | ||
98 | /* leave the last descriptor in the chain | |
99 | * so we can append to it | |
100 | */ | |
101 | if (desc->chain_node.next == &iop_chan->chain) | |
102 | return 1; | |
103 | ||
104 | dev_dbg(iop_chan->device->common.dev, | |
105 | "\tfree slot: %d slots_per_op: %d\n", | |
106 | desc->idx, desc->slots_per_op); | |
107 | ||
108 | list_del(&desc->chain_node); | |
109 | iop_adma_free_slots(desc); | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static void __iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan) | |
115 | { | |
116 | struct iop_adma_desc_slot *iter, *_iter, *grp_start = NULL; | |
117 | dma_cookie_t cookie = 0; | |
118 | u32 current_desc = iop_chan_get_current_descriptor(iop_chan); | |
119 | int busy = iop_chan_is_busy(iop_chan); | |
120 | int seen_current = 0, slot_cnt = 0, slots_per_op = 0; | |
121 | ||
3d9b525b | 122 | dev_dbg(iop_chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
123 | /* free completed slots from the chain starting with |
124 | * the oldest descriptor | |
125 | */ | |
126 | list_for_each_entry_safe(iter, _iter, &iop_chan->chain, | |
127 | chain_node) { | |
128 | pr_debug("\tcookie: %d slot: %d busy: %d " | |
129 | "this_desc: %#x next_desc: %#x ack: %d\n", | |
130 | iter->async_tx.cookie, iter->idx, busy, | |
131 | iter->async_tx.phys, iop_desc_get_next_desc(iter), | |
636bdeaa | 132 | async_tx_test_ack(&iter->async_tx)); |
c2110923 DW |
133 | prefetch(_iter); |
134 | prefetch(&_iter->async_tx); | |
135 | ||
136 | /* do not advance past the current descriptor loaded into the | |
137 | * hardware channel, subsequent descriptors are either in | |
138 | * process or have not been submitted | |
139 | */ | |
140 | if (seen_current) | |
141 | break; | |
142 | ||
143 | /* stop the search if we reach the current descriptor and the | |
144 | * channel is busy, or if it appears that the current descriptor | |
145 | * needs to be re-read (i.e. has been appended to) | |
146 | */ | |
147 | if (iter->async_tx.phys == current_desc) { | |
148 | BUG_ON(seen_current++); | |
149 | if (busy || iop_desc_get_next_desc(iter)) | |
150 | break; | |
151 | } | |
152 | ||
153 | /* detect the start of a group transaction */ | |
154 | if (!slot_cnt && !slots_per_op) { | |
155 | slot_cnt = iter->slot_cnt; | |
156 | slots_per_op = iter->slots_per_op; | |
157 | if (slot_cnt <= slots_per_op) { | |
158 | slot_cnt = 0; | |
159 | slots_per_op = 0; | |
160 | } | |
161 | } | |
162 | ||
163 | if (slot_cnt) { | |
164 | pr_debug("\tgroup++\n"); | |
165 | if (!grp_start) | |
166 | grp_start = iter; | |
167 | slot_cnt -= slots_per_op; | |
168 | } | |
169 | ||
170 | /* all the members of a group are complete */ | |
171 | if (slots_per_op != 0 && slot_cnt == 0) { | |
172 | struct iop_adma_desc_slot *grp_iter, *_grp_iter; | |
173 | int end_of_chain = 0; | |
174 | pr_debug("\tgroup end\n"); | |
175 | ||
176 | /* collect the total results */ | |
177 | if (grp_start->xor_check_result) { | |
178 | u32 zero_sum_result = 0; | |
179 | slot_cnt = grp_start->slot_cnt; | |
180 | grp_iter = grp_start; | |
181 | ||
182 | list_for_each_entry_from(grp_iter, | |
183 | &iop_chan->chain, chain_node) { | |
184 | zero_sum_result |= | |
185 | iop_desc_get_zero_result(grp_iter); | |
186 | pr_debug("\titer%d result: %d\n", | |
187 | grp_iter->idx, zero_sum_result); | |
188 | slot_cnt -= slots_per_op; | |
189 | if (slot_cnt == 0) | |
190 | break; | |
191 | } | |
192 | pr_debug("\tgrp_start->xor_check_result: %p\n", | |
193 | grp_start->xor_check_result); | |
194 | *grp_start->xor_check_result = zero_sum_result; | |
195 | } | |
196 | ||
197 | /* clean up the group */ | |
198 | slot_cnt = grp_start->slot_cnt; | |
199 | grp_iter = grp_start; | |
200 | list_for_each_entry_safe_from(grp_iter, _grp_iter, | |
201 | &iop_chan->chain, chain_node) { | |
202 | cookie = iop_adma_run_tx_complete_actions( | |
203 | grp_iter, iop_chan, cookie); | |
204 | ||
205 | slot_cnt -= slots_per_op; | |
206 | end_of_chain = iop_adma_clean_slot(grp_iter, | |
207 | iop_chan); | |
208 | ||
209 | if (slot_cnt == 0 || end_of_chain) | |
210 | break; | |
211 | } | |
212 | ||
213 | /* the group should be complete at this point */ | |
214 | BUG_ON(slot_cnt); | |
215 | ||
216 | slots_per_op = 0; | |
217 | grp_start = NULL; | |
218 | if (end_of_chain) | |
219 | break; | |
220 | else | |
221 | continue; | |
222 | } else if (slots_per_op) /* wait for group completion */ | |
223 | continue; | |
224 | ||
225 | /* write back zero sum results (single descriptor case) */ | |
226 | if (iter->xor_check_result && iter->async_tx.cookie) | |
227 | *iter->xor_check_result = | |
228 | iop_desc_get_zero_result(iter); | |
229 | ||
230 | cookie = iop_adma_run_tx_complete_actions( | |
231 | iter, iop_chan, cookie); | |
232 | ||
233 | if (iop_adma_clean_slot(iter, iop_chan)) | |
234 | break; | |
235 | } | |
236 | ||
c2110923 | 237 | if (cookie > 0) { |
4d4e58de | 238 | iop_chan->common.completed_cookie = cookie; |
c2110923 DW |
239 | pr_debug("\tcompleted cookie %d\n", cookie); |
240 | } | |
241 | } | |
242 | ||
243 | static void | |
244 | iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan) | |
245 | { | |
246 | spin_lock_bh(&iop_chan->lock); | |
247 | __iop_adma_slot_cleanup(iop_chan); | |
248 | spin_unlock_bh(&iop_chan->lock); | |
249 | } | |
250 | ||
251 | static void iop_adma_tasklet(unsigned long data) | |
252 | { | |
19242d72 DW |
253 | struct iop_adma_chan *iop_chan = (struct iop_adma_chan *) data; |
254 | ||
72be12f0 DW |
255 | /* lockdep will flag depedency submissions as potentially |
256 | * recursive locking, this is not the case as a dependency | |
257 | * submission will never recurse a channels submit routine. | |
258 | * There are checks in async_tx.c to prevent this. | |
259 | */ | |
260 | spin_lock_nested(&iop_chan->lock, SINGLE_DEPTH_NESTING); | |
19242d72 DW |
261 | __iop_adma_slot_cleanup(iop_chan); |
262 | spin_unlock(&iop_chan->lock); | |
c2110923 DW |
263 | } |
264 | ||
265 | static struct iop_adma_desc_slot * | |
266 | iop_adma_alloc_slots(struct iop_adma_chan *iop_chan, int num_slots, | |
267 | int slots_per_op) | |
268 | { | |
269 | struct iop_adma_desc_slot *iter, *_iter, *alloc_start = NULL; | |
e73ef9ac | 270 | LIST_HEAD(chain); |
c2110923 DW |
271 | int slots_found, retry = 0; |
272 | ||
273 | /* start search from the last allocated descrtiptor | |
274 | * if a contiguous allocation can not be found start searching | |
275 | * from the beginning of the list | |
276 | */ | |
277 | retry: | |
278 | slots_found = 0; | |
279 | if (retry == 0) | |
280 | iter = iop_chan->last_used; | |
281 | else | |
282 | iter = list_entry(&iop_chan->all_slots, | |
283 | struct iop_adma_desc_slot, | |
284 | slot_node); | |
285 | ||
286 | list_for_each_entry_safe_continue( | |
287 | iter, _iter, &iop_chan->all_slots, slot_node) { | |
288 | prefetch(_iter); | |
289 | prefetch(&_iter->async_tx); | |
290 | if (iter->slots_per_op) { | |
291 | /* give up after finding the first busy slot | |
292 | * on the second pass through the list | |
293 | */ | |
294 | if (retry) | |
295 | break; | |
296 | ||
297 | slots_found = 0; | |
298 | continue; | |
299 | } | |
300 | ||
301 | /* start the allocation if the slot is correctly aligned */ | |
302 | if (!slots_found++) { | |
303 | if (iop_desc_is_aligned(iter, slots_per_op)) | |
304 | alloc_start = iter; | |
305 | else { | |
306 | slots_found = 0; | |
307 | continue; | |
308 | } | |
309 | } | |
310 | ||
311 | if (slots_found == num_slots) { | |
312 | struct iop_adma_desc_slot *alloc_tail = NULL; | |
313 | struct iop_adma_desc_slot *last_used = NULL; | |
314 | iter = alloc_start; | |
315 | while (num_slots) { | |
316 | int i; | |
317 | dev_dbg(iop_chan->device->common.dev, | |
318 | "allocated slot: %d " | |
319 | "(desc %p phys: %#x) slots_per_op %d\n", | |
320 | iter->idx, iter->hw_desc, | |
321 | iter->async_tx.phys, slots_per_op); | |
322 | ||
323 | /* pre-ack all but the last descriptor */ | |
324 | if (num_slots != slots_per_op) | |
636bdeaa | 325 | async_tx_ack(&iter->async_tx); |
c2110923 DW |
326 | |
327 | list_add_tail(&iter->chain_node, &chain); | |
328 | alloc_tail = iter; | |
329 | iter->async_tx.cookie = 0; | |
330 | iter->slot_cnt = num_slots; | |
331 | iter->xor_check_result = NULL; | |
332 | for (i = 0; i < slots_per_op; i++) { | |
333 | iter->slots_per_op = slots_per_op - i; | |
334 | last_used = iter; | |
335 | iter = list_entry(iter->slot_node.next, | |
336 | struct iop_adma_desc_slot, | |
337 | slot_node); | |
338 | } | |
339 | num_slots -= slots_per_op; | |
340 | } | |
341 | alloc_tail->group_head = alloc_start; | |
342 | alloc_tail->async_tx.cookie = -EBUSY; | |
308136d1 | 343 | list_splice(&chain, &alloc_tail->tx_list); |
c2110923 DW |
344 | iop_chan->last_used = last_used; |
345 | iop_desc_clear_next_desc(alloc_start); | |
346 | iop_desc_clear_next_desc(alloc_tail); | |
347 | return alloc_tail; | |
348 | } | |
349 | } | |
350 | if (!retry++) | |
351 | goto retry; | |
352 | ||
c7141d00 DW |
353 | /* perform direct reclaim if the allocation fails */ |
354 | __iop_adma_slot_cleanup(iop_chan); | |
c2110923 DW |
355 | |
356 | return NULL; | |
357 | } | |
358 | ||
c2110923 DW |
359 | static void iop_adma_check_threshold(struct iop_adma_chan *iop_chan) |
360 | { | |
361 | dev_dbg(iop_chan->device->common.dev, "pending: %d\n", | |
362 | iop_chan->pending); | |
363 | ||
364 | if (iop_chan->pending >= IOP_ADMA_THRESHOLD) { | |
365 | iop_chan->pending = 0; | |
366 | iop_chan_append(iop_chan); | |
367 | } | |
368 | } | |
369 | ||
370 | static dma_cookie_t | |
371 | iop_adma_tx_submit(struct dma_async_tx_descriptor *tx) | |
372 | { | |
373 | struct iop_adma_desc_slot *sw_desc = tx_to_iop_adma_slot(tx); | |
374 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(tx->chan); | |
375 | struct iop_adma_desc_slot *grp_start, *old_chain_tail; | |
376 | int slot_cnt; | |
377 | int slots_per_op; | |
378 | dma_cookie_t cookie; | |
137cb55c | 379 | dma_addr_t next_dma; |
c2110923 DW |
380 | |
381 | grp_start = sw_desc->group_head; | |
382 | slot_cnt = grp_start->slot_cnt; | |
383 | slots_per_op = grp_start->slots_per_op; | |
384 | ||
385 | spin_lock_bh(&iop_chan->lock); | |
884485e1 | 386 | cookie = dma_cookie_assign(tx); |
c2110923 DW |
387 | |
388 | old_chain_tail = list_entry(iop_chan->chain.prev, | |
389 | struct iop_adma_desc_slot, chain_node); | |
308136d1 | 390 | list_splice_init(&sw_desc->tx_list, |
c2110923 DW |
391 | &old_chain_tail->chain_node); |
392 | ||
393 | /* fix up the hardware chain */ | |
137cb55c DW |
394 | next_dma = grp_start->async_tx.phys; |
395 | iop_desc_set_next_desc(old_chain_tail, next_dma); | |
396 | BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */ | |
c2110923 | 397 | |
137cb55c | 398 | /* check for pre-chained descriptors */ |
65e50381 | 399 | iop_paranoia(iop_desc_get_next_desc(sw_desc)); |
c2110923 DW |
400 | |
401 | /* increment the pending count by the number of slots | |
402 | * memcpy operations have a 1:1 (slot:operation) relation | |
403 | * other operations are heavier and will pop the threshold | |
404 | * more often. | |
405 | */ | |
406 | iop_chan->pending += slot_cnt; | |
407 | iop_adma_check_threshold(iop_chan); | |
408 | spin_unlock_bh(&iop_chan->lock); | |
409 | ||
410 | dev_dbg(iop_chan->device->common.dev, "%s cookie: %d slot: %d\n", | |
3d9b525b | 411 | __func__, sw_desc->async_tx.cookie, sw_desc->idx); |
c2110923 DW |
412 | |
413 | return cookie; | |
414 | } | |
415 | ||
c2110923 DW |
416 | static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan); |
417 | static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan); | |
418 | ||
5eb907aa DW |
419 | /** |
420 | * iop_adma_alloc_chan_resources - returns the number of allocated descriptors | |
421 | * @chan - allocate descriptor resources for this channel | |
422 | * @client - current client requesting the channel be ready for requests | |
423 | * | |
424 | * Note: We keep the slots for 1 operation on iop_chan->chain at all times. To | |
425 | * avoid deadlock, via async_xor, num_descs_in_pool must at a minimum be | |
426 | * greater than 2x the number slots needed to satisfy a device->max_xor | |
427 | * request. | |
428 | * */ | |
aa1e6f1a | 429 | static int iop_adma_alloc_chan_resources(struct dma_chan *chan) |
c2110923 DW |
430 | { |
431 | char *hw_desc; | |
432 | int idx; | |
433 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
434 | struct iop_adma_desc_slot *slot = NULL; | |
435 | int init = iop_chan->slots_allocated ? 0 : 1; | |
436 | struct iop_adma_platform_data *plat_data = | |
d4adcc01 | 437 | dev_get_platdata(&iop_chan->device->pdev->dev); |
c2110923 DW |
438 | int num_descs_in_pool = plat_data->pool_size/IOP_ADMA_SLOT_SIZE; |
439 | ||
440 | /* Allocate descriptor slots */ | |
441 | do { | |
442 | idx = iop_chan->slots_allocated; | |
443 | if (idx == num_descs_in_pool) | |
444 | break; | |
445 | ||
446 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); | |
447 | if (!slot) { | |
448 | printk(KERN_INFO "IOP ADMA Channel only initialized" | |
449 | " %d descriptor slots", idx); | |
450 | break; | |
451 | } | |
452 | hw_desc = (char *) iop_chan->device->dma_desc_pool_virt; | |
453 | slot->hw_desc = (void *) &hw_desc[idx * IOP_ADMA_SLOT_SIZE]; | |
454 | ||
455 | dma_async_tx_descriptor_init(&slot->async_tx, chan); | |
456 | slot->async_tx.tx_submit = iop_adma_tx_submit; | |
308136d1 | 457 | INIT_LIST_HEAD(&slot->tx_list); |
c2110923 DW |
458 | INIT_LIST_HEAD(&slot->chain_node); |
459 | INIT_LIST_HEAD(&slot->slot_node); | |
c2110923 DW |
460 | hw_desc = (char *) iop_chan->device->dma_desc_pool; |
461 | slot->async_tx.phys = | |
462 | (dma_addr_t) &hw_desc[idx * IOP_ADMA_SLOT_SIZE]; | |
463 | slot->idx = idx; | |
464 | ||
465 | spin_lock_bh(&iop_chan->lock); | |
466 | iop_chan->slots_allocated++; | |
467 | list_add_tail(&slot->slot_node, &iop_chan->all_slots); | |
468 | spin_unlock_bh(&iop_chan->lock); | |
469 | } while (iop_chan->slots_allocated < num_descs_in_pool); | |
470 | ||
471 | if (idx && !iop_chan->last_used) | |
472 | iop_chan->last_used = list_entry(iop_chan->all_slots.next, | |
473 | struct iop_adma_desc_slot, | |
474 | slot_node); | |
475 | ||
476 | dev_dbg(iop_chan->device->common.dev, | |
477 | "allocated %d descriptor slots last_used: %p\n", | |
478 | iop_chan->slots_allocated, iop_chan->last_used); | |
479 | ||
480 | /* initialize the channel and the chain with a null operation */ | |
481 | if (init) { | |
482 | if (dma_has_cap(DMA_MEMCPY, | |
483 | iop_chan->device->common.cap_mask)) | |
484 | iop_chan_start_null_memcpy(iop_chan); | |
485 | else if (dma_has_cap(DMA_XOR, | |
486 | iop_chan->device->common.cap_mask)) | |
487 | iop_chan_start_null_xor(iop_chan); | |
488 | else | |
489 | BUG(); | |
490 | } | |
491 | ||
492 | return (idx > 0) ? idx : -ENOMEM; | |
493 | } | |
494 | ||
495 | static struct dma_async_tx_descriptor * | |
636bdeaa | 496 | iop_adma_prep_dma_interrupt(struct dma_chan *chan, unsigned long flags) |
c2110923 DW |
497 | { |
498 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
499 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
500 | int slot_cnt, slots_per_op; | |
501 | ||
3d9b525b | 502 | dev_dbg(iop_chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
503 | |
504 | spin_lock_bh(&iop_chan->lock); | |
505 | slot_cnt = iop_chan_interrupt_slot_count(&slots_per_op, iop_chan); | |
506 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
507 | if (sw_desc) { | |
508 | grp_start = sw_desc->group_head; | |
509 | iop_desc_init_interrupt(grp_start, iop_chan); | |
636bdeaa | 510 | sw_desc->async_tx.flags = flags; |
c2110923 DW |
511 | } |
512 | spin_unlock_bh(&iop_chan->lock); | |
513 | ||
514 | return sw_desc ? &sw_desc->async_tx : NULL; | |
515 | } | |
516 | ||
c2110923 | 517 | static struct dma_async_tx_descriptor * |
0036731c | 518 | iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest, |
d4c56f97 | 519 | dma_addr_t dma_src, size_t len, unsigned long flags) |
c2110923 DW |
520 | { |
521 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
522 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
523 | int slot_cnt, slots_per_op; | |
524 | ||
525 | if (unlikely(!len)) | |
526 | return NULL; | |
e2ec771a | 527 | BUG_ON(len > IOP_ADMA_MAX_BYTE_COUNT); |
c2110923 DW |
528 | |
529 | dev_dbg(iop_chan->device->common.dev, "%s len: %u\n", | |
3d9b525b | 530 | __func__, len); |
c2110923 DW |
531 | |
532 | spin_lock_bh(&iop_chan->lock); | |
533 | slot_cnt = iop_chan_memcpy_slot_count(len, &slots_per_op); | |
534 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
535 | if (sw_desc) { | |
536 | grp_start = sw_desc->group_head; | |
d4c56f97 | 537 | iop_desc_init_memcpy(grp_start, flags); |
c2110923 | 538 | iop_desc_set_byte_count(grp_start, iop_chan, len); |
0036731c DW |
539 | iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest); |
540 | iop_desc_set_memcpy_src_addr(grp_start, dma_src); | |
636bdeaa | 541 | sw_desc->async_tx.flags = flags; |
c2110923 DW |
542 | } |
543 | spin_unlock_bh(&iop_chan->lock); | |
544 | ||
545 | return sw_desc ? &sw_desc->async_tx : NULL; | |
546 | } | |
547 | ||
c2110923 | 548 | static struct dma_async_tx_descriptor * |
0036731c DW |
549 | iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest, |
550 | dma_addr_t *dma_src, unsigned int src_cnt, size_t len, | |
d4c56f97 | 551 | unsigned long flags) |
c2110923 DW |
552 | { |
553 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
554 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
555 | int slot_cnt, slots_per_op; | |
556 | ||
557 | if (unlikely(!len)) | |
558 | return NULL; | |
e2ec771a | 559 | BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT); |
c2110923 DW |
560 | |
561 | dev_dbg(iop_chan->device->common.dev, | |
d4c56f97 | 562 | "%s src_cnt: %d len: %u flags: %lx\n", |
3d9b525b | 563 | __func__, src_cnt, len, flags); |
c2110923 DW |
564 | |
565 | spin_lock_bh(&iop_chan->lock); | |
566 | slot_cnt = iop_chan_xor_slot_count(len, src_cnt, &slots_per_op); | |
567 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
568 | if (sw_desc) { | |
569 | grp_start = sw_desc->group_head; | |
d4c56f97 | 570 | iop_desc_init_xor(grp_start, src_cnt, flags); |
c2110923 | 571 | iop_desc_set_byte_count(grp_start, iop_chan, len); |
0036731c | 572 | iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest); |
636bdeaa | 573 | sw_desc->async_tx.flags = flags; |
0036731c DW |
574 | while (src_cnt--) |
575 | iop_desc_set_xor_src_addr(grp_start, src_cnt, | |
576 | dma_src[src_cnt]); | |
c2110923 DW |
577 | } |
578 | spin_unlock_bh(&iop_chan->lock); | |
579 | ||
580 | return sw_desc ? &sw_desc->async_tx : NULL; | |
581 | } | |
582 | ||
c2110923 | 583 | static struct dma_async_tx_descriptor * |
099f53cb DW |
584 | iop_adma_prep_dma_xor_val(struct dma_chan *chan, dma_addr_t *dma_src, |
585 | unsigned int src_cnt, size_t len, u32 *result, | |
586 | unsigned long flags) | |
c2110923 DW |
587 | { |
588 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
589 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
590 | int slot_cnt, slots_per_op; | |
591 | ||
592 | if (unlikely(!len)) | |
593 | return NULL; | |
594 | ||
595 | dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %u\n", | |
3d9b525b | 596 | __func__, src_cnt, len); |
c2110923 DW |
597 | |
598 | spin_lock_bh(&iop_chan->lock); | |
599 | slot_cnt = iop_chan_zero_sum_slot_count(len, src_cnt, &slots_per_op); | |
600 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
601 | if (sw_desc) { | |
602 | grp_start = sw_desc->group_head; | |
d4c56f97 | 603 | iop_desc_init_zero_sum(grp_start, src_cnt, flags); |
c2110923 DW |
604 | iop_desc_set_zero_sum_byte_count(grp_start, len); |
605 | grp_start->xor_check_result = result; | |
606 | pr_debug("\t%s: grp_start->xor_check_result: %p\n", | |
3d9b525b | 607 | __func__, grp_start->xor_check_result); |
636bdeaa | 608 | sw_desc->async_tx.flags = flags; |
0036731c DW |
609 | while (src_cnt--) |
610 | iop_desc_set_zero_sum_src_addr(grp_start, src_cnt, | |
611 | dma_src[src_cnt]); | |
c2110923 DW |
612 | } |
613 | spin_unlock_bh(&iop_chan->lock); | |
614 | ||
615 | return sw_desc ? &sw_desc->async_tx : NULL; | |
616 | } | |
617 | ||
7bf649ae DW |
618 | static struct dma_async_tx_descriptor * |
619 | iop_adma_prep_dma_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src, | |
620 | unsigned int src_cnt, const unsigned char *scf, size_t len, | |
621 | unsigned long flags) | |
622 | { | |
623 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
624 | struct iop_adma_desc_slot *sw_desc, *g; | |
625 | int slot_cnt, slots_per_op; | |
626 | int continue_srcs; | |
627 | ||
628 | if (unlikely(!len)) | |
629 | return NULL; | |
630 | BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT); | |
631 | ||
632 | dev_dbg(iop_chan->device->common.dev, | |
633 | "%s src_cnt: %d len: %u flags: %lx\n", | |
634 | __func__, src_cnt, len, flags); | |
635 | ||
636 | if (dmaf_p_disabled_continue(flags)) | |
637 | continue_srcs = 1+src_cnt; | |
638 | else if (dmaf_continue(flags)) | |
639 | continue_srcs = 3+src_cnt; | |
640 | else | |
641 | continue_srcs = 0+src_cnt; | |
642 | ||
643 | spin_lock_bh(&iop_chan->lock); | |
644 | slot_cnt = iop_chan_pq_slot_count(len, continue_srcs, &slots_per_op); | |
645 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
646 | if (sw_desc) { | |
647 | int i; | |
648 | ||
649 | g = sw_desc->group_head; | |
650 | iop_desc_set_byte_count(g, iop_chan, len); | |
651 | ||
652 | /* even if P is disabled its destination address (bits | |
653 | * [3:0]) must match Q. It is ok if P points to an | |
654 | * invalid address, it won't be written. | |
655 | */ | |
656 | if (flags & DMA_PREP_PQ_DISABLE_P) | |
657 | dst[0] = dst[1] & 0x7; | |
658 | ||
659 | iop_desc_set_pq_addr(g, dst); | |
7bf649ae DW |
660 | sw_desc->async_tx.flags = flags; |
661 | for (i = 0; i < src_cnt; i++) | |
662 | iop_desc_set_pq_src_addr(g, i, src[i], scf[i]); | |
663 | ||
664 | /* if we are continuing a previous operation factor in | |
665 | * the old p and q values, see the comment for dma_maxpq | |
666 | * in include/linux/dmaengine.h | |
667 | */ | |
668 | if (dmaf_p_disabled_continue(flags)) | |
669 | iop_desc_set_pq_src_addr(g, i++, dst[1], 1); | |
670 | else if (dmaf_continue(flags)) { | |
671 | iop_desc_set_pq_src_addr(g, i++, dst[0], 0); | |
672 | iop_desc_set_pq_src_addr(g, i++, dst[1], 1); | |
673 | iop_desc_set_pq_src_addr(g, i++, dst[1], 0); | |
674 | } | |
675 | iop_desc_init_pq(g, i, flags); | |
676 | } | |
677 | spin_unlock_bh(&iop_chan->lock); | |
678 | ||
679 | return sw_desc ? &sw_desc->async_tx : NULL; | |
680 | } | |
681 | ||
682 | static struct dma_async_tx_descriptor * | |
683 | iop_adma_prep_dma_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src, | |
684 | unsigned int src_cnt, const unsigned char *scf, | |
685 | size_t len, enum sum_check_flags *pqres, | |
686 | unsigned long flags) | |
687 | { | |
688 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
689 | struct iop_adma_desc_slot *sw_desc, *g; | |
690 | int slot_cnt, slots_per_op; | |
691 | ||
692 | if (unlikely(!len)) | |
693 | return NULL; | |
694 | BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT); | |
695 | ||
696 | dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %u\n", | |
697 | __func__, src_cnt, len); | |
698 | ||
699 | spin_lock_bh(&iop_chan->lock); | |
700 | slot_cnt = iop_chan_pq_zero_sum_slot_count(len, src_cnt + 2, &slots_per_op); | |
701 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
702 | if (sw_desc) { | |
703 | /* for validate operations p and q are tagged onto the | |
704 | * end of the source list | |
705 | */ | |
706 | int pq_idx = src_cnt; | |
707 | ||
708 | g = sw_desc->group_head; | |
709 | iop_desc_init_pq_zero_sum(g, src_cnt+2, flags); | |
710 | iop_desc_set_pq_zero_sum_byte_count(g, len); | |
711 | g->pq_check_result = pqres; | |
712 | pr_debug("\t%s: g->pq_check_result: %p\n", | |
713 | __func__, g->pq_check_result); | |
7bf649ae DW |
714 | sw_desc->async_tx.flags = flags; |
715 | while (src_cnt--) | |
716 | iop_desc_set_pq_zero_sum_src_addr(g, src_cnt, | |
717 | src[src_cnt], | |
718 | scf[src_cnt]); | |
719 | iop_desc_set_pq_zero_sum_addr(g, pq_idx, src); | |
720 | } | |
721 | spin_unlock_bh(&iop_chan->lock); | |
722 | ||
723 | return sw_desc ? &sw_desc->async_tx : NULL; | |
724 | } | |
725 | ||
c2110923 DW |
726 | static void iop_adma_free_chan_resources(struct dma_chan *chan) |
727 | { | |
728 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
729 | struct iop_adma_desc_slot *iter, *_iter; | |
730 | int in_use_descs = 0; | |
731 | ||
732 | iop_adma_slot_cleanup(iop_chan); | |
733 | ||
734 | spin_lock_bh(&iop_chan->lock); | |
735 | list_for_each_entry_safe(iter, _iter, &iop_chan->chain, | |
736 | chain_node) { | |
737 | in_use_descs++; | |
738 | list_del(&iter->chain_node); | |
739 | } | |
740 | list_for_each_entry_safe_reverse( | |
741 | iter, _iter, &iop_chan->all_slots, slot_node) { | |
742 | list_del(&iter->slot_node); | |
743 | kfree(iter); | |
744 | iop_chan->slots_allocated--; | |
745 | } | |
746 | iop_chan->last_used = NULL; | |
747 | ||
748 | dev_dbg(iop_chan->device->common.dev, "%s slots_allocated %d\n", | |
3d9b525b | 749 | __func__, iop_chan->slots_allocated); |
c2110923 DW |
750 | spin_unlock_bh(&iop_chan->lock); |
751 | ||
752 | /* one is ok since we left it on there on purpose */ | |
753 | if (in_use_descs > 1) | |
754 | printk(KERN_ERR "IOP: Freeing %d in use descriptors!\n", | |
755 | in_use_descs - 1); | |
756 | } | |
757 | ||
758 | /** | |
07934481 | 759 | * iop_adma_status - poll the status of an ADMA transaction |
c2110923 DW |
760 | * @chan: ADMA channel handle |
761 | * @cookie: ADMA transaction identifier | |
07934481 | 762 | * @txstate: a holder for the current state of the channel or NULL |
c2110923 | 763 | */ |
07934481 | 764 | static enum dma_status iop_adma_status(struct dma_chan *chan, |
c2110923 | 765 | dma_cookie_t cookie, |
07934481 | 766 | struct dma_tx_state *txstate) |
c2110923 DW |
767 | { |
768 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
949ff5b8 | 769 | int ret; |
96a2af41 RKAL |
770 | |
771 | ret = dma_cookie_status(chan, cookie, txstate); | |
9f571502 | 772 | if (ret == DMA_COMPLETE) |
c2110923 DW |
773 | return ret; |
774 | ||
775 | iop_adma_slot_cleanup(iop_chan); | |
776 | ||
96a2af41 | 777 | return dma_cookie_status(chan, cookie, txstate); |
c2110923 DW |
778 | } |
779 | ||
780 | static irqreturn_t iop_adma_eot_handler(int irq, void *data) | |
781 | { | |
782 | struct iop_adma_chan *chan = data; | |
783 | ||
3d9b525b | 784 | dev_dbg(chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
785 | |
786 | tasklet_schedule(&chan->irq_tasklet); | |
787 | ||
788 | iop_adma_device_clear_eot_status(chan); | |
789 | ||
790 | return IRQ_HANDLED; | |
791 | } | |
792 | ||
793 | static irqreturn_t iop_adma_eoc_handler(int irq, void *data) | |
794 | { | |
795 | struct iop_adma_chan *chan = data; | |
796 | ||
3d9b525b | 797 | dev_dbg(chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
798 | |
799 | tasklet_schedule(&chan->irq_tasklet); | |
800 | ||
801 | iop_adma_device_clear_eoc_status(chan); | |
802 | ||
803 | return IRQ_HANDLED; | |
804 | } | |
805 | ||
806 | static irqreturn_t iop_adma_err_handler(int irq, void *data) | |
807 | { | |
808 | struct iop_adma_chan *chan = data; | |
809 | unsigned long status = iop_chan_get_status(chan); | |
810 | ||
1ba151cd | 811 | dev_err(chan->device->common.dev, |
c2110923 DW |
812 | "error ( %s%s%s%s%s%s%s)\n", |
813 | iop_is_err_int_parity(status, chan) ? "int_parity " : "", | |
814 | iop_is_err_mcu_abort(status, chan) ? "mcu_abort " : "", | |
815 | iop_is_err_int_tabort(status, chan) ? "int_tabort " : "", | |
816 | iop_is_err_int_mabort(status, chan) ? "int_mabort " : "", | |
817 | iop_is_err_pci_tabort(status, chan) ? "pci_tabort " : "", | |
818 | iop_is_err_pci_mabort(status, chan) ? "pci_mabort " : "", | |
819 | iop_is_err_split_tx(status, chan) ? "split_tx " : ""); | |
820 | ||
821 | iop_adma_device_clear_err_status(chan); | |
822 | ||
823 | BUG(); | |
824 | ||
825 | return IRQ_HANDLED; | |
826 | } | |
827 | ||
828 | static void iop_adma_issue_pending(struct dma_chan *chan) | |
829 | { | |
830 | struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan); | |
831 | ||
832 | if (iop_chan->pending) { | |
833 | iop_chan->pending = 0; | |
834 | iop_chan_append(iop_chan); | |
835 | } | |
836 | } | |
837 | ||
838 | /* | |
839 | * Perform a transaction to verify the HW works. | |
840 | */ | |
841 | #define IOP_ADMA_TEST_SIZE 2000 | |
842 | ||
463a1f8b | 843 | static int iop_adma_memcpy_self_test(struct iop_adma_device *device) |
c2110923 DW |
844 | { |
845 | int i; | |
846 | void *src, *dest; | |
847 | dma_addr_t src_dma, dest_dma; | |
848 | struct dma_chan *dma_chan; | |
849 | dma_cookie_t cookie; | |
850 | struct dma_async_tx_descriptor *tx; | |
851 | int err = 0; | |
852 | struct iop_adma_chan *iop_chan; | |
853 | ||
3d9b525b | 854 | dev_dbg(device->common.dev, "%s\n", __func__); |
c2110923 | 855 | |
eccf2144 | 856 | src = kmalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL); |
c2110923 DW |
857 | if (!src) |
858 | return -ENOMEM; | |
eccf2144 | 859 | dest = kzalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL); |
c2110923 DW |
860 | if (!dest) { |
861 | kfree(src); | |
862 | return -ENOMEM; | |
863 | } | |
864 | ||
865 | /* Fill in src buffer */ | |
866 | for (i = 0; i < IOP_ADMA_TEST_SIZE; i++) | |
867 | ((u8 *) src)[i] = (u8)i; | |
868 | ||
c2110923 DW |
869 | /* Start copy, using first DMA channel */ |
870 | dma_chan = container_of(device->common.channels.next, | |
871 | struct dma_chan, | |
872 | device_node); | |
aa1e6f1a | 873 | if (iop_adma_alloc_chan_resources(dma_chan) < 1) { |
c2110923 DW |
874 | err = -ENODEV; |
875 | goto out; | |
876 | } | |
877 | ||
c2110923 DW |
878 | dest_dma = dma_map_single(dma_chan->device->dev, dest, |
879 | IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE); | |
c2110923 DW |
880 | src_dma = dma_map_single(dma_chan->device->dev, src, |
881 | IOP_ADMA_TEST_SIZE, DMA_TO_DEVICE); | |
0036731c | 882 | tx = iop_adma_prep_dma_memcpy(dma_chan, dest_dma, src_dma, |
636bdeaa DW |
883 | IOP_ADMA_TEST_SIZE, |
884 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
c2110923 DW |
885 | |
886 | cookie = iop_adma_tx_submit(tx); | |
887 | iop_adma_issue_pending(dma_chan); | |
c2110923 DW |
888 | msleep(1); |
889 | ||
07934481 | 890 | if (iop_adma_status(dma_chan, cookie, NULL) != |
9f571502 | 891 | DMA_COMPLETE) { |
1ba151cd | 892 | dev_err(dma_chan->device->dev, |
c2110923 DW |
893 | "Self-test copy timed out, disabling\n"); |
894 | err = -ENODEV; | |
895 | goto free_resources; | |
896 | } | |
897 | ||
898 | iop_chan = to_iop_adma_chan(dma_chan); | |
899 | dma_sync_single_for_cpu(&iop_chan->device->pdev->dev, dest_dma, | |
900 | IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE); | |
901 | if (memcmp(src, dest, IOP_ADMA_TEST_SIZE)) { | |
1ba151cd | 902 | dev_err(dma_chan->device->dev, |
c2110923 DW |
903 | "Self-test copy failed compare, disabling\n"); |
904 | err = -ENODEV; | |
905 | goto free_resources; | |
906 | } | |
907 | ||
908 | free_resources: | |
909 | iop_adma_free_chan_resources(dma_chan); | |
910 | out: | |
911 | kfree(src); | |
912 | kfree(dest); | |
913 | return err; | |
914 | } | |
915 | ||
916 | #define IOP_ADMA_NUM_SRC_TEST 4 /* must be <= 15 */ | |
463a1f8b | 917 | static int |
099f53cb | 918 | iop_adma_xor_val_self_test(struct iop_adma_device *device) |
c2110923 DW |
919 | { |
920 | int i, src_idx; | |
921 | struct page *dest; | |
922 | struct page *xor_srcs[IOP_ADMA_NUM_SRC_TEST]; | |
923 | struct page *zero_sum_srcs[IOP_ADMA_NUM_SRC_TEST + 1]; | |
0036731c | 924 | dma_addr_t dma_srcs[IOP_ADMA_NUM_SRC_TEST + 1]; |
f9f0a7d0 | 925 | dma_addr_t dest_dma; |
c2110923 DW |
926 | struct dma_async_tx_descriptor *tx; |
927 | struct dma_chan *dma_chan; | |
928 | dma_cookie_t cookie; | |
929 | u8 cmp_byte = 0; | |
930 | u32 cmp_word; | |
931 | u32 zero_sum_result; | |
932 | int err = 0; | |
933 | struct iop_adma_chan *iop_chan; | |
934 | ||
3d9b525b | 935 | dev_dbg(device->common.dev, "%s\n", __func__); |
c2110923 DW |
936 | |
937 | for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++) { | |
938 | xor_srcs[src_idx] = alloc_page(GFP_KERNEL); | |
a09b09ae RK |
939 | if (!xor_srcs[src_idx]) { |
940 | while (src_idx--) | |
c2110923 | 941 | __free_page(xor_srcs[src_idx]); |
a09b09ae RK |
942 | return -ENOMEM; |
943 | } | |
c2110923 DW |
944 | } |
945 | ||
946 | dest = alloc_page(GFP_KERNEL); | |
a09b09ae RK |
947 | if (!dest) { |
948 | while (src_idx--) | |
c2110923 | 949 | __free_page(xor_srcs[src_idx]); |
a09b09ae RK |
950 | return -ENOMEM; |
951 | } | |
c2110923 DW |
952 | |
953 | /* Fill in src buffers */ | |
954 | for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++) { | |
955 | u8 *ptr = page_address(xor_srcs[src_idx]); | |
956 | for (i = 0; i < PAGE_SIZE; i++) | |
957 | ptr[i] = (1 << src_idx); | |
958 | } | |
959 | ||
960 | for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++) | |
961 | cmp_byte ^= (u8) (1 << src_idx); | |
962 | ||
963 | cmp_word = (cmp_byte << 24) | (cmp_byte << 16) | | |
964 | (cmp_byte << 8) | cmp_byte; | |
965 | ||
966 | memset(page_address(dest), 0, PAGE_SIZE); | |
967 | ||
968 | dma_chan = container_of(device->common.channels.next, | |
969 | struct dma_chan, | |
970 | device_node); | |
aa1e6f1a | 971 | if (iop_adma_alloc_chan_resources(dma_chan) < 1) { |
c2110923 DW |
972 | err = -ENODEV; |
973 | goto out; | |
974 | } | |
975 | ||
976 | /* test xor */ | |
c2110923 DW |
977 | dest_dma = dma_map_page(dma_chan->device->dev, dest, 0, |
978 | PAGE_SIZE, DMA_FROM_DEVICE); | |
0036731c DW |
979 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) |
980 | dma_srcs[i] = dma_map_page(dma_chan->device->dev, xor_srcs[i], | |
981 | 0, PAGE_SIZE, DMA_TO_DEVICE); | |
982 | tx = iop_adma_prep_dma_xor(dma_chan, dest_dma, dma_srcs, | |
636bdeaa DW |
983 | IOP_ADMA_NUM_SRC_TEST, PAGE_SIZE, |
984 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
c2110923 DW |
985 | |
986 | cookie = iop_adma_tx_submit(tx); | |
987 | iop_adma_issue_pending(dma_chan); | |
c2110923 DW |
988 | msleep(8); |
989 | ||
07934481 | 990 | if (iop_adma_status(dma_chan, cookie, NULL) != |
9f571502 | 991 | DMA_COMPLETE) { |
1ba151cd | 992 | dev_err(dma_chan->device->dev, |
c2110923 DW |
993 | "Self-test xor timed out, disabling\n"); |
994 | err = -ENODEV; | |
995 | goto free_resources; | |
996 | } | |
997 | ||
998 | iop_chan = to_iop_adma_chan(dma_chan); | |
999 | dma_sync_single_for_cpu(&iop_chan->device->pdev->dev, dest_dma, | |
1000 | PAGE_SIZE, DMA_FROM_DEVICE); | |
1001 | for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) { | |
1002 | u32 *ptr = page_address(dest); | |
1003 | if (ptr[i] != cmp_word) { | |
1ba151cd | 1004 | dev_err(dma_chan->device->dev, |
c2110923 DW |
1005 | "Self-test xor failed compare, disabling\n"); |
1006 | err = -ENODEV; | |
1007 | goto free_resources; | |
1008 | } | |
1009 | } | |
1010 | dma_sync_single_for_device(&iop_chan->device->pdev->dev, dest_dma, | |
1011 | PAGE_SIZE, DMA_TO_DEVICE); | |
1012 | ||
1013 | /* skip zero sum if the capability is not present */ | |
099f53cb | 1014 | if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask)) |
c2110923 DW |
1015 | goto free_resources; |
1016 | ||
1017 | /* zero sum the sources with the destintation page */ | |
1018 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) | |
1019 | zero_sum_srcs[i] = xor_srcs[i]; | |
1020 | zero_sum_srcs[i] = dest; | |
1021 | ||
1022 | zero_sum_result = 1; | |
1023 | ||
0036731c DW |
1024 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++) |
1025 | dma_srcs[i] = dma_map_page(dma_chan->device->dev, | |
1026 | zero_sum_srcs[i], 0, PAGE_SIZE, | |
1027 | DMA_TO_DEVICE); | |
099f53cb DW |
1028 | tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs, |
1029 | IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE, | |
1030 | &zero_sum_result, | |
1031 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
c2110923 DW |
1032 | |
1033 | cookie = iop_adma_tx_submit(tx); | |
1034 | iop_adma_issue_pending(dma_chan); | |
c2110923 DW |
1035 | msleep(8); |
1036 | ||
9f571502 | 1037 | if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) { |
1ba151cd | 1038 | dev_err(dma_chan->device->dev, |
c2110923 DW |
1039 | "Self-test zero sum timed out, disabling\n"); |
1040 | err = -ENODEV; | |
1041 | goto free_resources; | |
1042 | } | |
1043 | ||
1044 | if (zero_sum_result != 0) { | |
1ba151cd | 1045 | dev_err(dma_chan->device->dev, |
c2110923 DW |
1046 | "Self-test zero sum failed compare, disabling\n"); |
1047 | err = -ENODEV; | |
1048 | goto free_resources; | |
1049 | } | |
1050 | ||
c2110923 DW |
1051 | /* test for non-zero parity sum */ |
1052 | zero_sum_result = 0; | |
0036731c DW |
1053 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++) |
1054 | dma_srcs[i] = dma_map_page(dma_chan->device->dev, | |
1055 | zero_sum_srcs[i], 0, PAGE_SIZE, | |
1056 | DMA_TO_DEVICE); | |
099f53cb DW |
1057 | tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs, |
1058 | IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE, | |
1059 | &zero_sum_result, | |
1060 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
c2110923 DW |
1061 | |
1062 | cookie = iop_adma_tx_submit(tx); | |
1063 | iop_adma_issue_pending(dma_chan); | |
c2110923 DW |
1064 | msleep(8); |
1065 | ||
9f571502 | 1066 | if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) { |
1ba151cd | 1067 | dev_err(dma_chan->device->dev, |
c2110923 DW |
1068 | "Self-test non-zero sum timed out, disabling\n"); |
1069 | err = -ENODEV; | |
1070 | goto free_resources; | |
1071 | } | |
1072 | ||
1073 | if (zero_sum_result != 1) { | |
1ba151cd | 1074 | dev_err(dma_chan->device->dev, |
c2110923 DW |
1075 | "Self-test non-zero sum failed compare, disabling\n"); |
1076 | err = -ENODEV; | |
1077 | goto free_resources; | |
1078 | } | |
1079 | ||
1080 | free_resources: | |
1081 | iop_adma_free_chan_resources(dma_chan); | |
1082 | out: | |
1083 | src_idx = IOP_ADMA_NUM_SRC_TEST; | |
1084 | while (src_idx--) | |
1085 | __free_page(xor_srcs[src_idx]); | |
1086 | __free_page(dest); | |
1087 | return err; | |
1088 | } | |
1089 | ||
0261f741 | 1090 | #ifdef CONFIG_RAID6_PQ |
463a1f8b | 1091 | static int |
f6dbf651 DW |
1092 | iop_adma_pq_zero_sum_self_test(struct iop_adma_device *device) |
1093 | { | |
1094 | /* combined sources, software pq results, and extra hw pq results */ | |
1095 | struct page *pq[IOP_ADMA_NUM_SRC_TEST+2+2]; | |
1096 | /* ptr to the extra hw pq buffers defined above */ | |
1097 | struct page **pq_hw = &pq[IOP_ADMA_NUM_SRC_TEST+2]; | |
1098 | /* address conversion buffers (dma_map / page_address) */ | |
1099 | void *pq_sw[IOP_ADMA_NUM_SRC_TEST+2]; | |
3d9ea9e3 DM |
1100 | dma_addr_t pq_src[IOP_ADMA_NUM_SRC_TEST+2]; |
1101 | dma_addr_t *pq_dest = &pq_src[IOP_ADMA_NUM_SRC_TEST]; | |
f6dbf651 DW |
1102 | |
1103 | int i; | |
1104 | struct dma_async_tx_descriptor *tx; | |
1105 | struct dma_chan *dma_chan; | |
1106 | dma_cookie_t cookie; | |
1107 | u32 zero_sum_result; | |
1108 | int err = 0; | |
1109 | struct device *dev; | |
1110 | ||
1111 | dev_dbg(device->common.dev, "%s\n", __func__); | |
1112 | ||
1113 | for (i = 0; i < ARRAY_SIZE(pq); i++) { | |
1114 | pq[i] = alloc_page(GFP_KERNEL); | |
1115 | if (!pq[i]) { | |
1116 | while (i--) | |
1117 | __free_page(pq[i]); | |
1118 | return -ENOMEM; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* Fill in src buffers */ | |
1123 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) { | |
1124 | pq_sw[i] = page_address(pq[i]); | |
1125 | memset(pq_sw[i], 0x11111111 * (1<<i), PAGE_SIZE); | |
1126 | } | |
1127 | pq_sw[i] = page_address(pq[i]); | |
1128 | pq_sw[i+1] = page_address(pq[i+1]); | |
1129 | ||
1130 | dma_chan = container_of(device->common.channels.next, | |
1131 | struct dma_chan, | |
1132 | device_node); | |
1133 | if (iop_adma_alloc_chan_resources(dma_chan) < 1) { | |
1134 | err = -ENODEV; | |
1135 | goto out; | |
1136 | } | |
1137 | ||
1138 | dev = dma_chan->device->dev; | |
1139 | ||
1140 | /* initialize the dests */ | |
1141 | memset(page_address(pq_hw[0]), 0 , PAGE_SIZE); | |
1142 | memset(page_address(pq_hw[1]), 0 , PAGE_SIZE); | |
1143 | ||
1144 | /* test pq */ | |
1145 | pq_dest[0] = dma_map_page(dev, pq_hw[0], 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
1146 | pq_dest[1] = dma_map_page(dev, pq_hw[1], 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
1147 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) | |
1148 | pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE, | |
1149 | DMA_TO_DEVICE); | |
1150 | ||
1151 | tx = iop_adma_prep_dma_pq(dma_chan, pq_dest, pq_src, | |
1152 | IOP_ADMA_NUM_SRC_TEST, (u8 *)raid6_gfexp, | |
1153 | PAGE_SIZE, | |
1154 | DMA_PREP_INTERRUPT | | |
1155 | DMA_CTRL_ACK); | |
1156 | ||
1157 | cookie = iop_adma_tx_submit(tx); | |
1158 | iop_adma_issue_pending(dma_chan); | |
1159 | msleep(8); | |
1160 | ||
07934481 | 1161 | if (iop_adma_status(dma_chan, cookie, NULL) != |
9f571502 | 1162 | DMA_COMPLETE) { |
f6dbf651 DW |
1163 | dev_err(dev, "Self-test pq timed out, disabling\n"); |
1164 | err = -ENODEV; | |
1165 | goto free_resources; | |
1166 | } | |
1167 | ||
1168 | raid6_call.gen_syndrome(IOP_ADMA_NUM_SRC_TEST+2, PAGE_SIZE, pq_sw); | |
1169 | ||
1170 | if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST], | |
1171 | page_address(pq_hw[0]), PAGE_SIZE) != 0) { | |
1172 | dev_err(dev, "Self-test p failed compare, disabling\n"); | |
1173 | err = -ENODEV; | |
1174 | goto free_resources; | |
1175 | } | |
1176 | if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST+1], | |
1177 | page_address(pq_hw[1]), PAGE_SIZE) != 0) { | |
1178 | dev_err(dev, "Self-test q failed compare, disabling\n"); | |
1179 | err = -ENODEV; | |
1180 | goto free_resources; | |
1181 | } | |
1182 | ||
1183 | /* test correct zero sum using the software generated pq values */ | |
1184 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++) | |
1185 | pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE, | |
1186 | DMA_TO_DEVICE); | |
1187 | ||
1188 | zero_sum_result = ~0; | |
1189 | tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST], | |
1190 | pq_src, IOP_ADMA_NUM_SRC_TEST, | |
1191 | raid6_gfexp, PAGE_SIZE, &zero_sum_result, | |
1192 | DMA_PREP_INTERRUPT|DMA_CTRL_ACK); | |
1193 | ||
1194 | cookie = iop_adma_tx_submit(tx); | |
1195 | iop_adma_issue_pending(dma_chan); | |
1196 | msleep(8); | |
1197 | ||
07934481 | 1198 | if (iop_adma_status(dma_chan, cookie, NULL) != |
9f571502 | 1199 | DMA_COMPLETE) { |
f6dbf651 DW |
1200 | dev_err(dev, "Self-test pq-zero-sum timed out, disabling\n"); |
1201 | err = -ENODEV; | |
1202 | goto free_resources; | |
1203 | } | |
1204 | ||
1205 | if (zero_sum_result != 0) { | |
1206 | dev_err(dev, "Self-test pq-zero-sum failed to validate: %x\n", | |
1207 | zero_sum_result); | |
1208 | err = -ENODEV; | |
1209 | goto free_resources; | |
1210 | } | |
1211 | ||
1212 | /* test incorrect zero sum */ | |
1213 | i = IOP_ADMA_NUM_SRC_TEST; | |
1214 | memset(pq_sw[i] + 100, 0, 100); | |
1215 | memset(pq_sw[i+1] + 200, 0, 200); | |
1216 | for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++) | |
1217 | pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE, | |
1218 | DMA_TO_DEVICE); | |
1219 | ||
1220 | zero_sum_result = 0; | |
1221 | tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST], | |
1222 | pq_src, IOP_ADMA_NUM_SRC_TEST, | |
1223 | raid6_gfexp, PAGE_SIZE, &zero_sum_result, | |
1224 | DMA_PREP_INTERRUPT|DMA_CTRL_ACK); | |
1225 | ||
1226 | cookie = iop_adma_tx_submit(tx); | |
1227 | iop_adma_issue_pending(dma_chan); | |
1228 | msleep(8); | |
1229 | ||
07934481 | 1230 | if (iop_adma_status(dma_chan, cookie, NULL) != |
9f571502 | 1231 | DMA_COMPLETE) { |
f6dbf651 DW |
1232 | dev_err(dev, "Self-test !pq-zero-sum timed out, disabling\n"); |
1233 | err = -ENODEV; | |
1234 | goto free_resources; | |
1235 | } | |
1236 | ||
1237 | if (zero_sum_result != (SUM_CHECK_P_RESULT | SUM_CHECK_Q_RESULT)) { | |
1238 | dev_err(dev, "Self-test !pq-zero-sum failed to validate: %x\n", | |
1239 | zero_sum_result); | |
1240 | err = -ENODEV; | |
1241 | goto free_resources; | |
1242 | } | |
1243 | ||
1244 | free_resources: | |
1245 | iop_adma_free_chan_resources(dma_chan); | |
1246 | out: | |
1247 | i = ARRAY_SIZE(pq); | |
1248 | while (i--) | |
1249 | __free_page(pq[i]); | |
1250 | return err; | |
1251 | } | |
1252 | #endif | |
1253 | ||
4bf27b8b | 1254 | static int iop_adma_remove(struct platform_device *dev) |
c2110923 DW |
1255 | { |
1256 | struct iop_adma_device *device = platform_get_drvdata(dev); | |
1257 | struct dma_chan *chan, *_chan; | |
1258 | struct iop_adma_chan *iop_chan; | |
d4adcc01 | 1259 | struct iop_adma_platform_data *plat_data = dev_get_platdata(&dev->dev); |
c2110923 DW |
1260 | |
1261 | dma_async_device_unregister(&device->common); | |
1262 | ||
c2110923 DW |
1263 | dma_free_coherent(&dev->dev, plat_data->pool_size, |
1264 | device->dma_desc_pool_virt, device->dma_desc_pool); | |
1265 | ||
c2110923 DW |
1266 | list_for_each_entry_safe(chan, _chan, &device->common.channels, |
1267 | device_node) { | |
1268 | iop_chan = to_iop_adma_chan(chan); | |
1269 | list_del(&chan->device_node); | |
1270 | kfree(iop_chan); | |
1271 | } | |
1272 | kfree(device); | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
463a1f8b | 1277 | static int iop_adma_probe(struct platform_device *pdev) |
c2110923 DW |
1278 | { |
1279 | struct resource *res; | |
1280 | int ret = 0, i; | |
1281 | struct iop_adma_device *adev; | |
1282 | struct iop_adma_chan *iop_chan; | |
1283 | struct dma_device *dma_dev; | |
d4adcc01 | 1284 | struct iop_adma_platform_data *plat_data = dev_get_platdata(&pdev->dev); |
c2110923 DW |
1285 | |
1286 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1287 | if (!res) | |
1288 | return -ENODEV; | |
1289 | ||
1290 | if (!devm_request_mem_region(&pdev->dev, res->start, | |
2e032b62 | 1291 | resource_size(res), pdev->name)) |
c2110923 DW |
1292 | return -EBUSY; |
1293 | ||
1294 | adev = kzalloc(sizeof(*adev), GFP_KERNEL); | |
1295 | if (!adev) | |
1296 | return -ENOMEM; | |
1297 | dma_dev = &adev->common; | |
1298 | ||
1299 | /* allocate coherent memory for hardware descriptors | |
1300 | * note: writecombine gives slightly better performance, but | |
1301 | * requires that we explicitly flush the writes | |
1302 | */ | |
f6e45661 LR |
1303 | adev->dma_desc_pool_virt = dma_alloc_wc(&pdev->dev, |
1304 | plat_data->pool_size, | |
1305 | &adev->dma_desc_pool, | |
1306 | GFP_KERNEL); | |
39c33704 | 1307 | if (!adev->dma_desc_pool_virt) { |
c2110923 DW |
1308 | ret = -ENOMEM; |
1309 | goto err_free_adev; | |
1310 | } | |
1311 | ||
b6695e41 | 1312 | dev_dbg(&pdev->dev, "%s: allocated descriptor pool virt %p phys %p\n", |
3d9b525b | 1313 | __func__, adev->dma_desc_pool_virt, |
c2110923 DW |
1314 | (void *) adev->dma_desc_pool); |
1315 | ||
1316 | adev->id = plat_data->hw_id; | |
1317 | ||
1318 | /* discover transaction capabilites from the platform data */ | |
1319 | dma_dev->cap_mask = plat_data->cap_mask; | |
1320 | ||
1321 | adev->pdev = pdev; | |
1322 | platform_set_drvdata(pdev, adev); | |
1323 | ||
1324 | INIT_LIST_HEAD(&dma_dev->channels); | |
1325 | ||
1326 | /* set base routines */ | |
1327 | dma_dev->device_alloc_chan_resources = iop_adma_alloc_chan_resources; | |
1328 | dma_dev->device_free_chan_resources = iop_adma_free_chan_resources; | |
07934481 | 1329 | dma_dev->device_tx_status = iop_adma_status; |
c2110923 | 1330 | dma_dev->device_issue_pending = iop_adma_issue_pending; |
c2110923 DW |
1331 | dma_dev->dev = &pdev->dev; |
1332 | ||
1333 | /* set prep routines based on capability */ | |
1334 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) | |
1335 | dma_dev->device_prep_dma_memcpy = iop_adma_prep_dma_memcpy; | |
c2110923 DW |
1336 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { |
1337 | dma_dev->max_xor = iop_adma_get_max_xor(); | |
1338 | dma_dev->device_prep_dma_xor = iop_adma_prep_dma_xor; | |
1339 | } | |
099f53cb DW |
1340 | if (dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask)) |
1341 | dma_dev->device_prep_dma_xor_val = | |
1342 | iop_adma_prep_dma_xor_val; | |
7bf649ae DW |
1343 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
1344 | dma_set_maxpq(dma_dev, iop_adma_get_max_pq(), 0); | |
1345 | dma_dev->device_prep_dma_pq = iop_adma_prep_dma_pq; | |
1346 | } | |
1347 | if (dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask)) | |
1348 | dma_dev->device_prep_dma_pq_val = | |
1349 | iop_adma_prep_dma_pq_val; | |
c2110923 DW |
1350 | if (dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask)) |
1351 | dma_dev->device_prep_dma_interrupt = | |
1352 | iop_adma_prep_dma_interrupt; | |
1353 | ||
1354 | iop_chan = kzalloc(sizeof(*iop_chan), GFP_KERNEL); | |
1355 | if (!iop_chan) { | |
1356 | ret = -ENOMEM; | |
1357 | goto err_free_dma; | |
1358 | } | |
1359 | iop_chan->device = adev; | |
1360 | ||
1361 | iop_chan->mmr_base = devm_ioremap(&pdev->dev, res->start, | |
2e032b62 | 1362 | resource_size(res)); |
c2110923 DW |
1363 | if (!iop_chan->mmr_base) { |
1364 | ret = -ENOMEM; | |
1365 | goto err_free_iop_chan; | |
1366 | } | |
1367 | tasklet_init(&iop_chan->irq_tasklet, iop_adma_tasklet, (unsigned long) | |
1368 | iop_chan); | |
1369 | ||
1370 | /* clear errors before enabling interrupts */ | |
1371 | iop_adma_device_clear_err_status(iop_chan); | |
1372 | ||
1373 | for (i = 0; i < 3; i++) { | |
1374 | irq_handler_t handler[] = { iop_adma_eot_handler, | |
1375 | iop_adma_eoc_handler, | |
1376 | iop_adma_err_handler }; | |
1377 | int irq = platform_get_irq(pdev, i); | |
1378 | if (irq < 0) { | |
1379 | ret = -ENXIO; | |
1380 | goto err_free_iop_chan; | |
1381 | } else { | |
1382 | ret = devm_request_irq(&pdev->dev, irq, | |
1383 | handler[i], 0, pdev->name, iop_chan); | |
1384 | if (ret) | |
1385 | goto err_free_iop_chan; | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | spin_lock_init(&iop_chan->lock); | |
c2110923 DW |
1390 | INIT_LIST_HEAD(&iop_chan->chain); |
1391 | INIT_LIST_HEAD(&iop_chan->all_slots); | |
c2110923 | 1392 | iop_chan->common.device = dma_dev; |
8ac69546 | 1393 | dma_cookie_init(&iop_chan->common); |
c2110923 DW |
1394 | list_add_tail(&iop_chan->common.device_node, &dma_dev->channels); |
1395 | ||
1396 | if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { | |
1397 | ret = iop_adma_memcpy_self_test(adev); | |
1398 | dev_dbg(&pdev->dev, "memcpy self test returned %d\n", ret); | |
1399 | if (ret) | |
1400 | goto err_free_iop_chan; | |
1401 | } | |
1402 | ||
48a9db46 | 1403 | if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { |
099f53cb | 1404 | ret = iop_adma_xor_val_self_test(adev); |
c2110923 DW |
1405 | dev_dbg(&pdev->dev, "xor self test returned %d\n", ret); |
1406 | if (ret) | |
1407 | goto err_free_iop_chan; | |
1408 | } | |
1409 | ||
f6dbf651 DW |
1410 | if (dma_has_cap(DMA_PQ, dma_dev->cap_mask) && |
1411 | dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask)) { | |
0261f741 | 1412 | #ifdef CONFIG_RAID6_PQ |
f6dbf651 DW |
1413 | ret = iop_adma_pq_zero_sum_self_test(adev); |
1414 | dev_dbg(&pdev->dev, "pq self test returned %d\n", ret); | |
1415 | #else | |
1416 | /* can not test raid6, so do not publish capability */ | |
1417 | dma_cap_clear(DMA_PQ, dma_dev->cap_mask); | |
1418 | dma_cap_clear(DMA_PQ_VAL, dma_dev->cap_mask); | |
1419 | ret = 0; | |
1420 | #endif | |
1421 | if (ret) | |
1422 | goto err_free_iop_chan; | |
1423 | } | |
1424 | ||
f9f0a7d0 | 1425 | dev_info(&pdev->dev, "Intel(R) IOP: ( %s%s%s%s%s%s)\n", |
1ba151cd JP |
1426 | dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "pq " : "", |
1427 | dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask) ? "pq_val " : "", | |
1428 | dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "", | |
1429 | dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask) ? "xor_val " : "", | |
1ba151cd JP |
1430 | dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "", |
1431 | dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : ""); | |
c2110923 DW |
1432 | |
1433 | dma_async_device_register(dma_dev); | |
1434 | goto out; | |
1435 | ||
1436 | err_free_iop_chan: | |
1437 | kfree(iop_chan); | |
1438 | err_free_dma: | |
1439 | dma_free_coherent(&adev->pdev->dev, plat_data->pool_size, | |
1440 | adev->dma_desc_pool_virt, adev->dma_desc_pool); | |
1441 | err_free_adev: | |
1442 | kfree(adev); | |
1443 | out: | |
1444 | return ret; | |
1445 | } | |
1446 | ||
1447 | static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan) | |
1448 | { | |
1449 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
1450 | dma_cookie_t cookie; | |
1451 | int slot_cnt, slots_per_op; | |
1452 | ||
3d9b525b | 1453 | dev_dbg(iop_chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
1454 | |
1455 | spin_lock_bh(&iop_chan->lock); | |
1456 | slot_cnt = iop_chan_memcpy_slot_count(0, &slots_per_op); | |
1457 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
1458 | if (sw_desc) { | |
1459 | grp_start = sw_desc->group_head; | |
1460 | ||
308136d1 | 1461 | list_splice_init(&sw_desc->tx_list, &iop_chan->chain); |
636bdeaa | 1462 | async_tx_ack(&sw_desc->async_tx); |
c2110923 DW |
1463 | iop_desc_init_memcpy(grp_start, 0); |
1464 | iop_desc_set_byte_count(grp_start, iop_chan, 0); | |
1465 | iop_desc_set_dest_addr(grp_start, iop_chan, 0); | |
1466 | iop_desc_set_memcpy_src_addr(grp_start, 0); | |
1467 | ||
2a926e46 | 1468 | cookie = dma_cookie_assign(&sw_desc->async_tx); |
c2110923 DW |
1469 | |
1470 | /* initialize the completed cookie to be less than | |
1471 | * the most recently used cookie | |
1472 | */ | |
4d4e58de | 1473 | iop_chan->common.completed_cookie = cookie - 1; |
c2110923 DW |
1474 | |
1475 | /* channel should not be busy */ | |
1476 | BUG_ON(iop_chan_is_busy(iop_chan)); | |
1477 | ||
1478 | /* clear any prior error-status bits */ | |
1479 | iop_adma_device_clear_err_status(iop_chan); | |
1480 | ||
1481 | /* disable operation */ | |
1482 | iop_chan_disable(iop_chan); | |
1483 | ||
1484 | /* set the descriptor address */ | |
1485 | iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys); | |
1486 | ||
1487 | /* 1/ don't add pre-chained descriptors | |
1488 | * 2/ dummy read to flush next_desc write | |
1489 | */ | |
1490 | BUG_ON(iop_desc_get_next_desc(sw_desc)); | |
1491 | ||
1492 | /* run the descriptor */ | |
1493 | iop_chan_enable(iop_chan); | |
1494 | } else | |
1ba151cd JP |
1495 | dev_err(iop_chan->device->common.dev, |
1496 | "failed to allocate null descriptor\n"); | |
c2110923 DW |
1497 | spin_unlock_bh(&iop_chan->lock); |
1498 | } | |
1499 | ||
1500 | static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan) | |
1501 | { | |
1502 | struct iop_adma_desc_slot *sw_desc, *grp_start; | |
1503 | dma_cookie_t cookie; | |
1504 | int slot_cnt, slots_per_op; | |
1505 | ||
3d9b525b | 1506 | dev_dbg(iop_chan->device->common.dev, "%s\n", __func__); |
c2110923 DW |
1507 | |
1508 | spin_lock_bh(&iop_chan->lock); | |
1509 | slot_cnt = iop_chan_xor_slot_count(0, 2, &slots_per_op); | |
1510 | sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op); | |
1511 | if (sw_desc) { | |
1512 | grp_start = sw_desc->group_head; | |
308136d1 | 1513 | list_splice_init(&sw_desc->tx_list, &iop_chan->chain); |
636bdeaa | 1514 | async_tx_ack(&sw_desc->async_tx); |
c2110923 DW |
1515 | iop_desc_init_null_xor(grp_start, 2, 0); |
1516 | iop_desc_set_byte_count(grp_start, iop_chan, 0); | |
1517 | iop_desc_set_dest_addr(grp_start, iop_chan, 0); | |
1518 | iop_desc_set_xor_src_addr(grp_start, 0, 0); | |
1519 | iop_desc_set_xor_src_addr(grp_start, 1, 0); | |
1520 | ||
2a926e46 | 1521 | cookie = dma_cookie_assign(&sw_desc->async_tx); |
c2110923 DW |
1522 | |
1523 | /* initialize the completed cookie to be less than | |
1524 | * the most recently used cookie | |
1525 | */ | |
4d4e58de | 1526 | iop_chan->common.completed_cookie = cookie - 1; |
c2110923 DW |
1527 | |
1528 | /* channel should not be busy */ | |
1529 | BUG_ON(iop_chan_is_busy(iop_chan)); | |
1530 | ||
1531 | /* clear any prior error-status bits */ | |
1532 | iop_adma_device_clear_err_status(iop_chan); | |
1533 | ||
1534 | /* disable operation */ | |
1535 | iop_chan_disable(iop_chan); | |
1536 | ||
1537 | /* set the descriptor address */ | |
1538 | iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys); | |
1539 | ||
1540 | /* 1/ don't add pre-chained descriptors | |
1541 | * 2/ dummy read to flush next_desc write | |
1542 | */ | |
1543 | BUG_ON(iop_desc_get_next_desc(sw_desc)); | |
1544 | ||
1545 | /* run the descriptor */ | |
1546 | iop_chan_enable(iop_chan); | |
1547 | } else | |
1ba151cd | 1548 | dev_err(iop_chan->device->common.dev, |
c2110923 DW |
1549 | "failed to allocate null descriptor\n"); |
1550 | spin_unlock_bh(&iop_chan->lock); | |
1551 | } | |
1552 | ||
1553 | static struct platform_driver iop_adma_driver = { | |
1554 | .probe = iop_adma_probe, | |
a7d6e3ec | 1555 | .remove = iop_adma_remove, |
c2110923 | 1556 | .driver = { |
c2110923 DW |
1557 | .name = "iop-adma", |
1558 | }, | |
1559 | }; | |
1560 | ||
c94e9105 | 1561 | module_platform_driver(iop_adma_driver); |
c2110923 DW |
1562 | |
1563 | MODULE_AUTHOR("Intel Corporation"); | |
1564 | MODULE_DESCRIPTION("IOP ADMA Engine Driver"); | |
1565 | MODULE_LICENSE("GPL"); | |
c94e9105 | 1566 | MODULE_ALIAS("platform:iop-adma"); |