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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / dma / fsl-qdma.c
blob95cc0256b38782983845216bafcb502a094354c4
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright 2014-2015 Freescale
3 // Copyright 2018 NXP
4
5 /*
6 * Driver for NXP Layerscape Queue Direct Memory Access Controller
7 *
8 * Author:
9 * Wen He <wen.he_1@nxp.com>
10 * Jiaheng Fan <jiaheng.fan@nxp.com>
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/delay.h>
16 #include <linux/of_irq.h>
17 #include <linux/of_platform.h>
18 #include <linux/of_dma.h>
19 #include <linux/dma-mapping.h>
20
21 #include "virt-dma.h"
22 #include "fsldma.h"
23
24 /* Register related definition */
25 #define FSL_QDMA_DMR 0x0
26 #define FSL_QDMA_DSR 0x4
27 #define FSL_QDMA_DEIER 0xe00
28 #define FSL_QDMA_DEDR 0xe04
29 #define FSL_QDMA_DECFDW0R 0xe10
30 #define FSL_QDMA_DECFDW1R 0xe14
31 #define FSL_QDMA_DECFDW2R 0xe18
32 #define FSL_QDMA_DECFDW3R 0xe1c
33 #define FSL_QDMA_DECFQIDR 0xe30
34 #define FSL_QDMA_DECBR 0xe34
35
36 #define FSL_QDMA_BCQMR(x) (0xc0 + 0x100 * (x))
37 #define FSL_QDMA_BCQSR(x) (0xc4 + 0x100 * (x))
38 #define FSL_QDMA_BCQEDPA_SADDR(x) (0xc8 + 0x100 * (x))
39 #define FSL_QDMA_BCQDPA_SADDR(x) (0xcc + 0x100 * (x))
40 #define FSL_QDMA_BCQEEPA_SADDR(x) (0xd0 + 0x100 * (x))
41 #define FSL_QDMA_BCQEPA_SADDR(x) (0xd4 + 0x100 * (x))
42 #define FSL_QDMA_BCQIER(x) (0xe0 + 0x100 * (x))
43 #define FSL_QDMA_BCQIDR(x) (0xe4 + 0x100 * (x))
44
45 #define FSL_QDMA_SQDPAR 0x80c
46 #define FSL_QDMA_SQEPAR 0x814
47 #define FSL_QDMA_BSQMR 0x800
48 #define FSL_QDMA_BSQSR 0x804
49 #define FSL_QDMA_BSQICR 0x828
50 #define FSL_QDMA_CQMR 0xa00
51 #define FSL_QDMA_CQDSCR1 0xa08
52 #define FSL_QDMA_CQDSCR2 0xa0c
53 #define FSL_QDMA_CQIER 0xa10
54 #define FSL_QDMA_CQEDR 0xa14
55 #define FSL_QDMA_SQCCMR 0xa20
56
57 /* Registers for bit and genmask */
58 #define FSL_QDMA_CQIDR_SQT BIT(15)
59 #define QDMA_CCDF_FOTMAT BIT(29)
60 #define QDMA_CCDF_SER BIT(30)
61 #define QDMA_SG_FIN BIT(30)
62 #define QDMA_SG_LEN_MASK GENMASK(29, 0)
63 #define QDMA_CCDF_MASK GENMASK(28, 20)
64
65 #define FSL_QDMA_DEDR_CLEAR GENMASK(31, 0)
66 #define FSL_QDMA_BCQIDR_CLEAR GENMASK(31, 0)
67 #define FSL_QDMA_DEIER_CLEAR GENMASK(31, 0)
68
69 #define FSL_QDMA_BCQIER_CQTIE BIT(15)
70 #define FSL_QDMA_BCQIER_CQPEIE BIT(23)
71 #define FSL_QDMA_BSQICR_ICEN BIT(31)
72
73 #define FSL_QDMA_BSQICR_ICST(x) ((x) << 16)
74 #define FSL_QDMA_CQIER_MEIE BIT(31)
75 #define FSL_QDMA_CQIER_TEIE BIT(0)
76 #define FSL_QDMA_SQCCMR_ENTER_WM BIT(21)
77
78 #define FSL_QDMA_BCQMR_EN BIT(31)
79 #define FSL_QDMA_BCQMR_EI BIT(30)
80 #define FSL_QDMA_BCQMR_CD_THLD(x) ((x) << 20)
81 #define FSL_QDMA_BCQMR_CQ_SIZE(x) ((x) << 16)
82
83 #define FSL_QDMA_BCQSR_QF BIT(16)
84 #define FSL_QDMA_BCQSR_XOFF BIT(0)
85
86 #define FSL_QDMA_BSQMR_EN BIT(31)
87 #define FSL_QDMA_BSQMR_DI BIT(30)
88 #define FSL_QDMA_BSQMR_CQ_SIZE(x) ((x) << 16)
89
90 #define FSL_QDMA_BSQSR_QE BIT(17)
91
92 #define FSL_QDMA_DMR_DQD BIT(30)
93 #define FSL_QDMA_DSR_DB BIT(31)
94
95 /* Size related definition */
96 #define FSL_QDMA_QUEUE_MAX 8
97 #define FSL_QDMA_COMMAND_BUFFER_SIZE 64
98 #define FSL_QDMA_DESCRIPTOR_BUFFER_SIZE 32
99 #define FSL_QDMA_CIRCULAR_DESC_SIZE_MIN 64
100 #define FSL_QDMA_CIRCULAR_DESC_SIZE_MAX 16384
101 #define FSL_QDMA_QUEUE_NUM_MAX 8
102
103 /* Field definition for CMD */
104 #define FSL_QDMA_CMD_RWTTYPE 0x4
105 #define FSL_QDMA_CMD_LWC 0x2
106 #define FSL_QDMA_CMD_RWTTYPE_OFFSET 28
107 #define FSL_QDMA_CMD_NS_OFFSET 27
108 #define FSL_QDMA_CMD_DQOS_OFFSET 24
109 #define FSL_QDMA_CMD_WTHROTL_OFFSET 20
110 #define FSL_QDMA_CMD_DSEN_OFFSET 19
111 #define FSL_QDMA_CMD_LWC_OFFSET 16
112
113 /* Field definition for Descriptor offset */
114 #define QDMA_CCDF_STATUS 20
115 #define QDMA_CCDF_OFFSET 20
116 #define QDMA_SDDF_CMD(x) (((u64)(x)) << 32)
117
118 /* Field definition for safe loop count*/
119 #define FSL_QDMA_HALT_COUNT 1500
120 #define FSL_QDMA_MAX_SIZE 16385
121 #define FSL_QDMA_COMP_TIMEOUT 1000
122 #define FSL_COMMAND_QUEUE_OVERFLLOW 10
123
124 #define FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma_engine, x) \
125 (((fsl_qdma_engine)->block_offset) * (x))
126
127 /**
128 * struct fsl_qdma_format - This is the struct holding describing compound
129 * descriptor format with qDMA.
130 * @status: Command status and enqueue status notification.
131 * @cfg: Frame offset and frame format.
132 * @addr_lo: Holding the compound descriptor of the lower
133 * 32-bits address in memory 40-bit address.
134 * @addr_hi: Same as above member, but point high 8-bits in
135 * memory 40-bit address.
136 * @__reserved1: Reserved field.
137 * @cfg8b_w1: Compound descriptor command queue origin produced
138 * by qDMA and dynamic debug field.
139 * @data Pointer to the memory 40-bit address, describes DMA
140 * source information and DMA destination information.
141 */
142 struct fsl_qdma_format {
143 __le32 status;
144 __le32 cfg;
145 union {
146 struct {
147 __le32 addr_lo;
148 u8 addr_hi;
149 u8 __reserved1[2];
150 u8 cfg8b_w1;
151 } __packed;
152 __le64 data;
153 };
154 } __packed;
155
156 /* qDMA status notification pre information */
157 struct fsl_pre_status {
158 u64 addr;
159 u8 queue;
160 };
161
162 static DEFINE_PER_CPU(struct fsl_pre_status, pre);
163
164 struct fsl_qdma_chan {
165 struct virt_dma_chan vchan;
166 struct virt_dma_desc vdesc;
167 enum dma_status status;
168 struct fsl_qdma_engine *qdma;
169 struct fsl_qdma_queue *queue;
170 };
171
172 struct fsl_qdma_queue {
173 struct fsl_qdma_format *virt_head;
174 struct fsl_qdma_format *virt_tail;
175 struct list_head comp_used;
176 struct list_head comp_free;
177 struct dma_pool *comp_pool;
178 struct dma_pool *desc_pool;
179 spinlock_t queue_lock;
180 dma_addr_t bus_addr;
181 u32 n_cq;
182 u32 id;
183 struct fsl_qdma_format *cq;
184 void __iomem *block_base;
185 };
186
187 struct fsl_qdma_comp {
188 dma_addr_t bus_addr;
189 dma_addr_t desc_bus_addr;
190 struct fsl_qdma_format *virt_addr;
191 struct fsl_qdma_format *desc_virt_addr;
192 struct fsl_qdma_chan *qchan;
193 struct virt_dma_desc vdesc;
194 struct list_head list;
195 };
196
197 struct fsl_qdma_engine {
198 struct dma_device dma_dev;
199 void __iomem *ctrl_base;
200 void __iomem *status_base;
201 void __iomem *block_base;
202 u32 n_chans;
203 u32 n_queues;
204 struct mutex fsl_qdma_mutex;
205 int error_irq;
206 int *queue_irq;
207 u32 feature;
208 struct fsl_qdma_queue *queue;
209 struct fsl_qdma_queue **status;
210 struct fsl_qdma_chan *chans;
211 int block_number;
212 int block_offset;
213 int irq_base;
214 int desc_allocated;
215
216 };
217
218 static inline u64
219 qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
220 {
221 return le64_to_cpu(ccdf->data) & (U64_MAX >> 24);
222 }
223
224 static inline void
225 qdma_desc_addr_set64(struct fsl_qdma_format *ccdf, u64 addr)
226 {
227 ccdf->addr_hi = upper_32_bits(addr);
228 ccdf->addr_lo = cpu_to_le32(lower_32_bits(addr));
229 }
230
231 static inline u8
232 qdma_ccdf_get_queue(const struct fsl_qdma_format *ccdf)
233 {
234 return ccdf->cfg8b_w1 & U8_MAX;
235 }
236
237 static inline int
238 qdma_ccdf_get_offset(const struct fsl_qdma_format *ccdf)
239 {
240 return (le32_to_cpu(ccdf->cfg) & QDMA_CCDF_MASK) >> QDMA_CCDF_OFFSET;
241 }
242
243 static inline void
244 qdma_ccdf_set_format(struct fsl_qdma_format *ccdf, int offset)
245 {
246 ccdf->cfg = cpu_to_le32(QDMA_CCDF_FOTMAT | offset);
247 }
248
249 static inline int
250 qdma_ccdf_get_status(const struct fsl_qdma_format *ccdf)
251 {
252 return (le32_to_cpu(ccdf->status) & QDMA_CCDF_MASK) >> QDMA_CCDF_STATUS;
253 }
254
255 static inline void
256 qdma_ccdf_set_ser(struct fsl_qdma_format *ccdf, int status)
257 {
258 ccdf->status = cpu_to_le32(QDMA_CCDF_SER | status);
259 }
260
261 static inline void qdma_csgf_set_len(struct fsl_qdma_format *csgf, int len)
262 {
263 csgf->cfg = cpu_to_le32(len & QDMA_SG_LEN_MASK);
264 }
265
266 static inline void qdma_csgf_set_f(struct fsl_qdma_format *csgf, int len)
267 {
268 csgf->cfg = cpu_to_le32(QDMA_SG_FIN | (len & QDMA_SG_LEN_MASK));
269 }
270
271 static u32 qdma_readl(struct fsl_qdma_engine *qdma, void __iomem *addr)
272 {
273 return FSL_DMA_IN(qdma, addr, 32);
274 }
275
276 static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
277 void __iomem *addr)
278 {
279 FSL_DMA_OUT(qdma, addr, val, 32);
280 }
281
282 static struct fsl_qdma_chan *to_fsl_qdma_chan(struct dma_chan *chan)
283 {
284 return container_of(chan, struct fsl_qdma_chan, vchan.chan);
285 }
286
287 static struct fsl_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
288 {
289 return container_of(vd, struct fsl_qdma_comp, vdesc);
290 }
291
292 static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
293 {
294 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
295 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
296 struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
297 struct fsl_qdma_comp *comp_temp, *_comp_temp;
298 unsigned long flags;
299 LIST_HEAD(head);
300
301 spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
302 vchan_get_all_descriptors(&fsl_chan->vchan, &head);
303 spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
304
305 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
306
307 if (!fsl_queue->comp_pool && !fsl_queue->desc_pool)
308 return;
309
310 list_for_each_entry_safe(comp_temp, _comp_temp,
311 &fsl_queue->comp_used, list) {
312 dma_pool_free(fsl_queue->comp_pool,
313 comp_temp->virt_addr,
314 comp_temp->bus_addr);
315 dma_pool_free(fsl_queue->desc_pool,
316 comp_temp->desc_virt_addr,
317 comp_temp->desc_bus_addr);
318 list_del(&comp_temp->list);
319 kfree(comp_temp);
320 }
321
322 list_for_each_entry_safe(comp_temp, _comp_temp,
323 &fsl_queue->comp_free, list) {
324 dma_pool_free(fsl_queue->comp_pool,
325 comp_temp->virt_addr,
326 comp_temp->bus_addr);
327 dma_pool_free(fsl_queue->desc_pool,
328 comp_temp->desc_virt_addr,
329 comp_temp->desc_bus_addr);
330 list_del(&comp_temp->list);
331 kfree(comp_temp);
332 }
333
334 dma_pool_destroy(fsl_queue->comp_pool);
335 dma_pool_destroy(fsl_queue->desc_pool);
336
337 fsl_qdma->desc_allocated--;
338 fsl_queue->comp_pool = NULL;
339 fsl_queue->desc_pool = NULL;
340 }
341
342 static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
343 dma_addr_t dst, dma_addr_t src, u32 len)
344 {
345 u32 cmd;
346 struct fsl_qdma_format *sdf, *ddf;
347 struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
348
349 ccdf = fsl_comp->virt_addr;
350 csgf_desc = fsl_comp->virt_addr + 1;
351 csgf_src = fsl_comp->virt_addr + 2;
352 csgf_dest = fsl_comp->virt_addr + 3;
353 sdf = fsl_comp->desc_virt_addr;
354 ddf = fsl_comp->desc_virt_addr + 1;
355
356 memset(fsl_comp->virt_addr, 0, FSL_QDMA_COMMAND_BUFFER_SIZE);
357 memset(fsl_comp->desc_virt_addr, 0, FSL_QDMA_DESCRIPTOR_BUFFER_SIZE);
358 /* Head Command Descriptor(Frame Descriptor) */
359 qdma_desc_addr_set64(ccdf, fsl_comp->bus_addr + 16);
360 qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
361 qdma_ccdf_set_ser(ccdf, qdma_ccdf_get_status(ccdf));
362 /* Status notification is enqueued to status queue. */
363 /* Compound Command Descriptor(Frame List Table) */
364 qdma_desc_addr_set64(csgf_desc, fsl_comp->desc_bus_addr);
365 /* It must be 32 as Compound S/G Descriptor */
366 qdma_csgf_set_len(csgf_desc, 32);
367 qdma_desc_addr_set64(csgf_src, src);
368 qdma_csgf_set_len(csgf_src, len);
369 qdma_desc_addr_set64(csgf_dest, dst);
370 qdma_csgf_set_len(csgf_dest, len);
371 /* This entry is the last entry. */
372 qdma_csgf_set_f(csgf_dest, len);
373 /* Descriptor Buffer */
374 cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
375 FSL_QDMA_CMD_RWTTYPE_OFFSET);
376 sdf->data = QDMA_SDDF_CMD(cmd);
377
378 cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
379 FSL_QDMA_CMD_RWTTYPE_OFFSET);
380 cmd |= cpu_to_le32(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
381 ddf->data = QDMA_SDDF_CMD(cmd);
382 }
383
384 /*
385 * Pre-request full command descriptor for enqueue.
386 */
387 static int fsl_qdma_pre_request_enqueue_desc(struct fsl_qdma_queue *queue)
388 {
389 int i;
390 struct fsl_qdma_comp *comp_temp, *_comp_temp;
391
392 for (i = 0; i < queue->n_cq + FSL_COMMAND_QUEUE_OVERFLLOW; i++) {
393 comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
394 if (!comp_temp)
395 goto err_alloc;
396 comp_temp->virt_addr =
397 dma_pool_alloc(queue->comp_pool, GFP_KERNEL,
398 &comp_temp->bus_addr);
399 if (!comp_temp->virt_addr)
400 goto err_dma_alloc;
401
402 comp_temp->desc_virt_addr =
403 dma_pool_alloc(queue->desc_pool, GFP_KERNEL,
404 &comp_temp->desc_bus_addr);
405 if (!comp_temp->desc_virt_addr)
406 goto err_desc_dma_alloc;
407
408 list_add_tail(&comp_temp->list, &queue->comp_free);
409 }
410
411 return 0;
412
413 err_desc_dma_alloc:
414 dma_pool_free(queue->comp_pool, comp_temp->virt_addr,
415 comp_temp->bus_addr);
416
417 err_dma_alloc:
418 kfree(comp_temp);
419
420 err_alloc:
421 list_for_each_entry_safe(comp_temp, _comp_temp,
422 &queue->comp_free, list) {
423 if (comp_temp->virt_addr)
424 dma_pool_free(queue->comp_pool,
425 comp_temp->virt_addr,
426 comp_temp->bus_addr);
427 if (comp_temp->desc_virt_addr)
428 dma_pool_free(queue->desc_pool,
429 comp_temp->desc_virt_addr,
430 comp_temp->desc_bus_addr);
431
432 list_del(&comp_temp->list);
433 kfree(comp_temp);
434 }
435
436 return -ENOMEM;
437 }
438
439 /*
440 * Request a command descriptor for enqueue.
441 */
442 static struct fsl_qdma_comp
443 *fsl_qdma_request_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
444 {
445 unsigned long flags;
446 struct fsl_qdma_comp *comp_temp;
447 int timeout = FSL_QDMA_COMP_TIMEOUT;
448 struct fsl_qdma_queue *queue = fsl_chan->queue;
449
450 while (timeout--) {
451 spin_lock_irqsave(&queue->queue_lock, flags);
452 if (!list_empty(&queue->comp_free)) {
453 comp_temp = list_first_entry(&queue->comp_free,
454 struct fsl_qdma_comp,
455 list);
456 list_del(&comp_temp->list);
457
458 spin_unlock_irqrestore(&queue->queue_lock, flags);
459 comp_temp->qchan = fsl_chan;
460 return comp_temp;
461 }
462 spin_unlock_irqrestore(&queue->queue_lock, flags);
463 udelay(1);
464 }
465
466 return NULL;
467 }
468
469 static struct fsl_qdma_queue
470 *fsl_qdma_alloc_queue_resources(struct platform_device *pdev,
471 struct fsl_qdma_engine *fsl_qdma)
472 {
473 int ret, len, i, j;
474 int queue_num, block_number;
475 unsigned int queue_size[FSL_QDMA_QUEUE_MAX];
476 struct fsl_qdma_queue *queue_head, *queue_temp;
477
478 queue_num = fsl_qdma->n_queues;
479 block_number = fsl_qdma->block_number;
480
481 if (queue_num > FSL_QDMA_QUEUE_MAX)
482 queue_num = FSL_QDMA_QUEUE_MAX;
483 len = sizeof(*queue_head) * queue_num * block_number;
484 queue_head = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
485 if (!queue_head)
486 return NULL;
487
488 ret = device_property_read_u32_array(&pdev->dev, "queue-sizes",
489 queue_size, queue_num);
490 if (ret) {
491 dev_err(&pdev->dev, "Can't get queue-sizes.\n");
492 return NULL;
493 }
494 for (j = 0; j < block_number; j++) {
495 for (i = 0; i < queue_num; i++) {
496 if (queue_size[i] > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
497 queue_size[i] < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
498 dev_err(&pdev->dev,
499 "Get wrong queue-sizes.\n");
500 return NULL;
501 }
502 queue_temp = queue_head + i + (j * queue_num);
503
504 queue_temp->cq =
505 dma_alloc_coherent(&pdev->dev,
506 sizeof(struct fsl_qdma_format) *
507 queue_size[i],
508 &queue_temp->bus_addr,
509 GFP_KERNEL);
510 if (!queue_temp->cq)
511 return NULL;
512 queue_temp->block_base = fsl_qdma->block_base +
513 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
514 queue_temp->n_cq = queue_size[i];
515 queue_temp->id = i;
516 queue_temp->virt_head = queue_temp->cq;
517 queue_temp->virt_tail = queue_temp->cq;
518 /*
519 * List for queue command buffer
520 */
521 INIT_LIST_HEAD(&queue_temp->comp_used);
522 spin_lock_init(&queue_temp->queue_lock);
523 }
524 }
525 return queue_head;
526 }
527
528 static struct fsl_qdma_queue
529 *fsl_qdma_prep_status_queue(struct platform_device *pdev)
530 {
531 int ret;
532 unsigned int status_size;
533 struct fsl_qdma_queue *status_head;
534 struct device_node *np = pdev->dev.of_node;
535
536 ret = of_property_read_u32(np, "status-sizes", &status_size);
537 if (ret) {
538 dev_err(&pdev->dev, "Can't get status-sizes.\n");
539 return NULL;
540 }
541 if (status_size > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
542 status_size < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
543 dev_err(&pdev->dev, "Get wrong status_size.\n");
544 return NULL;
545 }
546 status_head = devm_kzalloc(&pdev->dev,
547 sizeof(*status_head), GFP_KERNEL);
548 if (!status_head)
549 return NULL;
550
551 /*
552 * Buffer for queue command
553 */
554 status_head->cq = dma_alloc_coherent(&pdev->dev,
555 sizeof(struct fsl_qdma_format) *
556 status_size,
557 &status_head->bus_addr,
558 GFP_KERNEL);
559 if (!status_head->cq) {
560 devm_kfree(&pdev->dev, status_head);
561 return NULL;
562 }
563 status_head->n_cq = status_size;
564 status_head->virt_head = status_head->cq;
565 status_head->virt_tail = status_head->cq;
566 status_head->comp_pool = NULL;
567
568 return status_head;
569 }
570
571 static int fsl_qdma_halt(struct fsl_qdma_engine *fsl_qdma)
572 {
573 u32 reg;
574 int i, j, count = FSL_QDMA_HALT_COUNT;
575 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
576
577 /* Disable the command queue and wait for idle state. */
578 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
579 reg |= FSL_QDMA_DMR_DQD;
580 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
581 for (j = 0; j < fsl_qdma->block_number; j++) {
582 block = fsl_qdma->block_base +
583 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
584 for (i = 0; i < FSL_QDMA_QUEUE_NUM_MAX; i++)
585 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQMR(i));
586 }
587 while (1) {
588 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DSR);
589 if (!(reg & FSL_QDMA_DSR_DB))
590 break;
591 if (count-- < 0)
592 return -EBUSY;
593 udelay(100);
594 }
595
596 for (j = 0; j < fsl_qdma->block_number; j++) {
597 block = fsl_qdma->block_base +
598 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
599
600 /* Disable status queue. */
601 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BSQMR);
602
603 /*
604 * clear the command queue interrupt detect register for
605 * all queues.
606 */
607 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
608 block + FSL_QDMA_BCQIDR(0));
609 }
610
611 return 0;
612 }
613
614 static int
615 fsl_qdma_queue_transfer_complete(struct fsl_qdma_engine *fsl_qdma,
616 void *block,
617 int id)
618 {
619 bool duplicate;
620 u32 reg, i, count;
621 struct fsl_qdma_queue *temp_queue;
622 struct fsl_qdma_format *status_addr;
623 struct fsl_qdma_comp *fsl_comp = NULL;
624 struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
625 struct fsl_qdma_queue *fsl_status = fsl_qdma->status[id];
626
627 count = FSL_QDMA_MAX_SIZE;
628
629 while (count--) {
630 duplicate = 0;
631 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
632 if (reg & FSL_QDMA_BSQSR_QE)
633 return 0;
634
635 status_addr = fsl_status->virt_head;
636
637 if (qdma_ccdf_get_queue(status_addr) ==
638 __this_cpu_read(pre.queue) &&
639 qdma_ccdf_addr_get64(status_addr) ==
640 __this_cpu_read(pre.addr))
641 duplicate = 1;
642 i = qdma_ccdf_get_queue(status_addr) +
643 id * fsl_qdma->n_queues;
644 __this_cpu_write(pre.addr, qdma_ccdf_addr_get64(status_addr));
645 __this_cpu_write(pre.queue, qdma_ccdf_get_queue(status_addr));
646 temp_queue = fsl_queue + i;
647
648 spin_lock(&temp_queue->queue_lock);
649 if (list_empty(&temp_queue->comp_used)) {
650 if (!duplicate) {
651 spin_unlock(&temp_queue->queue_lock);
652 return -EAGAIN;
653 }
654 } else {
655 fsl_comp = list_first_entry(&temp_queue->comp_used,
656 struct fsl_qdma_comp, list);
657 if (fsl_comp->bus_addr + 16 !=
658 __this_cpu_read(pre.addr)) {
659 if (!duplicate) {
660 spin_unlock(&temp_queue->queue_lock);
661 return -EAGAIN;
662 }
663 }
664 }
665
666 if (duplicate) {
667 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
668 reg |= FSL_QDMA_BSQMR_DI;
669 qdma_desc_addr_set64(status_addr, 0x0);
670 fsl_status->virt_head++;
671 if (fsl_status->virt_head == fsl_status->cq
672 + fsl_status->n_cq)
673 fsl_status->virt_head = fsl_status->cq;
674 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
675 spin_unlock(&temp_queue->queue_lock);
676 continue;
677 }
678 list_del(&fsl_comp->list);
679
680 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
681 reg |= FSL_QDMA_BSQMR_DI;
682 qdma_desc_addr_set64(status_addr, 0x0);
683 fsl_status->virt_head++;
684 if (fsl_status->virt_head == fsl_status->cq + fsl_status->n_cq)
685 fsl_status->virt_head = fsl_status->cq;
686 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
687 spin_unlock(&temp_queue->queue_lock);
688
689 spin_lock(&fsl_comp->qchan->vchan.lock);
690 vchan_cookie_complete(&fsl_comp->vdesc);
691 fsl_comp->qchan->status = DMA_COMPLETE;
692 spin_unlock(&fsl_comp->qchan->vchan.lock);
693 }
694
695 return 0;
696 }
697
698 static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
699 {
700 unsigned int intr;
701 struct fsl_qdma_engine *fsl_qdma = dev_id;
702 void __iomem *status = fsl_qdma->status_base;
703
704 intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
705
706 if (intr)
707 dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
708
709 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
710 return IRQ_HANDLED;
711 }
712
713 static irqreturn_t fsl_qdma_queue_handler(int irq, void *dev_id)
714 {
715 int id;
716 unsigned int intr, reg;
717 struct fsl_qdma_engine *fsl_qdma = dev_id;
718 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
719
720 id = irq - fsl_qdma->irq_base;
721 if (id < 0 && id > fsl_qdma->block_number) {
722 dev_err(fsl_qdma->dma_dev.dev,
723 "irq %d is wrong irq_base is %d\n",
724 irq, fsl_qdma->irq_base);
725 }
726
727 block = fsl_qdma->block_base +
728 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, id);
729
730 intr = qdma_readl(fsl_qdma, block + FSL_QDMA_BCQIDR(0));
731
732 if ((intr & FSL_QDMA_CQIDR_SQT) != 0)
733 intr = fsl_qdma_queue_transfer_complete(fsl_qdma, block, id);
734
735 if (intr != 0) {
736 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
737 reg |= FSL_QDMA_DMR_DQD;
738 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
739 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQIER(0));
740 dev_err(fsl_qdma->dma_dev.dev, "QDMA: status err!\n");
741 }
742
743 /* Clear all detected events and interrupts. */
744 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
745 block + FSL_QDMA_BCQIDR(0));
746
747 return IRQ_HANDLED;
748 }
749
750 static int
751 fsl_qdma_irq_init(struct platform_device *pdev,
752 struct fsl_qdma_engine *fsl_qdma)
753 {
754 int i;
755 int cpu;
756 int ret;
757 char irq_name[20];
758
759 fsl_qdma->error_irq =
760 platform_get_irq_byname(pdev, "qdma-error");
761 if (fsl_qdma->error_irq < 0)
762 return fsl_qdma->error_irq;
763
764 ret = devm_request_irq(&pdev->dev, fsl_qdma->error_irq,
765 fsl_qdma_error_handler, 0,
766 "qDMA error", fsl_qdma);
767 if (ret) {
768 dev_err(&pdev->dev, "Can't register qDMA controller IRQ.\n");
769 return ret;
770 }
771
772 for (i = 0; i < fsl_qdma->block_number; i++) {
773 sprintf(irq_name, "qdma-queue%d", i);
774 fsl_qdma->queue_irq[i] =
775 platform_get_irq_byname(pdev, irq_name);
776
777 if (fsl_qdma->queue_irq[i] < 0)
778 return fsl_qdma->queue_irq[i];
779
780 ret = devm_request_irq(&pdev->dev,
781 fsl_qdma->queue_irq[i],
782 fsl_qdma_queue_handler,
783 0,
784 "qDMA queue",
785 fsl_qdma);
786 if (ret) {
787 dev_err(&pdev->dev,
788 "Can't register qDMA queue IRQ.\n");
789 return ret;
790 }
791
792 cpu = i % num_online_cpus();
793 ret = irq_set_affinity_hint(fsl_qdma->queue_irq[i],
794 get_cpu_mask(cpu));
795 if (ret) {
796 dev_err(&pdev->dev,
797 "Can't set cpu %d affinity to IRQ %d.\n",
798 cpu,
799 fsl_qdma->queue_irq[i]);
800 return ret;
801 }
802 }
803
804 return 0;
805 }
806
807 static void fsl_qdma_irq_exit(struct platform_device *pdev,
808 struct fsl_qdma_engine *fsl_qdma)
809 {
810 int i;
811
812 devm_free_irq(&pdev->dev, fsl_qdma->error_irq, fsl_qdma);
813 for (i = 0; i < fsl_qdma->block_number; i++)
814 devm_free_irq(&pdev->dev, fsl_qdma->queue_irq[i], fsl_qdma);
815 }
816
817 static int fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma)
818 {
819 u32 reg;
820 int i, j, ret;
821 struct fsl_qdma_queue *temp;
822 void __iomem *status = fsl_qdma->status_base;
823 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
824 struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
825
826 /* Try to halt the qDMA engine first. */
827 ret = fsl_qdma_halt(fsl_qdma);
828 if (ret) {
829 dev_err(fsl_qdma->dma_dev.dev, "DMA halt failed!");
830 return ret;
831 }
832
833 for (i = 0; i < fsl_qdma->block_number; i++) {
834 /*
835 * Clear the command queue interrupt detect register for
836 * all queues.
837 */
838
839 block = fsl_qdma->block_base +
840 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, i);
841 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
842 block + FSL_QDMA_BCQIDR(0));
843 }
844
845 for (j = 0; j < fsl_qdma->block_number; j++) {
846 block = fsl_qdma->block_base +
847 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
848 for (i = 0; i < fsl_qdma->n_queues; i++) {
849 temp = fsl_queue + i + (j * fsl_qdma->n_queues);
850 /*
851 * Initialize Command Queue registers to
852 * point to the first
853 * command descriptor in memory.
854 * Dequeue Pointer Address Registers
855 * Enqueue Pointer Address Registers
856 */
857
858 qdma_writel(fsl_qdma, temp->bus_addr,
859 block + FSL_QDMA_BCQDPA_SADDR(i));
860 qdma_writel(fsl_qdma, temp->bus_addr,
861 block + FSL_QDMA_BCQEPA_SADDR(i));
862
863 /* Initialize the queue mode. */
864 reg = FSL_QDMA_BCQMR_EN;
865 reg |= FSL_QDMA_BCQMR_CD_THLD(ilog2(temp->n_cq) - 4);
866 reg |= FSL_QDMA_BCQMR_CQ_SIZE(ilog2(temp->n_cq) - 6);
867 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BCQMR(i));
868 }
869
870 /*
871 * Workaround for erratum: ERR010812.
872 * We must enable XOFF to avoid the enqueue rejection occurs.
873 * Setting SQCCMR ENTER_WM to 0x20.
874 */
875
876 qdma_writel(fsl_qdma, FSL_QDMA_SQCCMR_ENTER_WM,
877 block + FSL_QDMA_SQCCMR);
878
879 /*
880 * Initialize status queue registers to point to the first
881 * command descriptor in memory.
882 * Dequeue Pointer Address Registers
883 * Enqueue Pointer Address Registers
884 */
885
886 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
887 block + FSL_QDMA_SQEPAR);
888 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
889 block + FSL_QDMA_SQDPAR);
890 /* Initialize status queue interrupt. */
891 qdma_writel(fsl_qdma, FSL_QDMA_BCQIER_CQTIE,
892 block + FSL_QDMA_BCQIER(0));
893 qdma_writel(fsl_qdma, FSL_QDMA_BSQICR_ICEN |
894 FSL_QDMA_BSQICR_ICST(5) | 0x8000,
895 block + FSL_QDMA_BSQICR);
896 qdma_writel(fsl_qdma, FSL_QDMA_CQIER_MEIE |
897 FSL_QDMA_CQIER_TEIE,
898 block + FSL_QDMA_CQIER);
899
900 /* Initialize the status queue mode. */
901 reg = FSL_QDMA_BSQMR_EN;
902 reg |= FSL_QDMA_BSQMR_CQ_SIZE(ilog2
903 (fsl_qdma->status[j]->n_cq) - 6);
904
905 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
906 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
907 }
908
909 /* Initialize controller interrupt register. */
910 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
911 qdma_writel(fsl_qdma, FSL_QDMA_DEIER_CLEAR, status + FSL_QDMA_DEIER);
912
913 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
914 reg &= ~FSL_QDMA_DMR_DQD;
915 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
916
917 return 0;
918 }
919
920 static struct dma_async_tx_descriptor *
921 fsl_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
922 dma_addr_t src, size_t len, unsigned long flags)
923 {
924 struct fsl_qdma_comp *fsl_comp;
925 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
926
927 fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan);
928
929 if (!fsl_comp)
930 return NULL;
931
932 fsl_qdma_comp_fill_memcpy(fsl_comp, dst, src, len);
933
934 return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
935 }
936
937 static void fsl_qdma_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
938 {
939 u32 reg;
940 struct virt_dma_desc *vdesc;
941 struct fsl_qdma_comp *fsl_comp;
942 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
943 void __iomem *block = fsl_queue->block_base;
944
945 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQSR(fsl_queue->id));
946 if (reg & (FSL_QDMA_BCQSR_QF | FSL_QDMA_BCQSR_XOFF))
947 return;
948 vdesc = vchan_next_desc(&fsl_chan->vchan);
949 if (!vdesc)
950 return;
951 list_del(&vdesc->node);
952 fsl_comp = to_fsl_qdma_comp(vdesc);
953
954 memcpy(fsl_queue->virt_head++,
955 fsl_comp->virt_addr, sizeof(struct fsl_qdma_format));
956 if (fsl_queue->virt_head == fsl_queue->cq + fsl_queue->n_cq)
957 fsl_queue->virt_head = fsl_queue->cq;
958
959 list_add_tail(&fsl_comp->list, &fsl_queue->comp_used);
960 barrier();
961 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQMR(fsl_queue->id));
962 reg |= FSL_QDMA_BCQMR_EI;
963 qdma_writel(fsl_chan->qdma, reg, block + FSL_QDMA_BCQMR(fsl_queue->id));
964 fsl_chan->status = DMA_IN_PROGRESS;
965 }
966
967 static void fsl_qdma_free_desc(struct virt_dma_desc *vdesc)
968 {
969 unsigned long flags;
970 struct fsl_qdma_comp *fsl_comp;
971 struct fsl_qdma_queue *fsl_queue;
972
973 fsl_comp = to_fsl_qdma_comp(vdesc);
974 fsl_queue = fsl_comp->qchan->queue;
975
976 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
977 list_add_tail(&fsl_comp->list, &fsl_queue->comp_free);
978 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
979 }
980
981 static void fsl_qdma_issue_pending(struct dma_chan *chan)
982 {
983 unsigned long flags;
984 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
985 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
986
987 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
988 spin_lock(&fsl_chan->vchan.lock);
989 if (vchan_issue_pending(&fsl_chan->vchan))
990 fsl_qdma_enqueue_desc(fsl_chan);
991 spin_unlock(&fsl_chan->vchan.lock);
992 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
993 }
994
995 static void fsl_qdma_synchronize(struct dma_chan *chan)
996 {
997 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
998
999 vchan_synchronize(&fsl_chan->vchan);
1000 }
1001
1002 static int fsl_qdma_terminate_all(struct dma_chan *chan)
1003 {
1004 LIST_HEAD(head);
1005 unsigned long flags;
1006 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1007
1008 spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
1009 vchan_get_all_descriptors(&fsl_chan->vchan, &head);
1010 spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
1011 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
1012 return 0;
1013 }
1014
1015 static int fsl_qdma_alloc_chan_resources(struct dma_chan *chan)
1016 {
1017 int ret;
1018 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1019 struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
1020 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
1021
1022 if (fsl_queue->comp_pool && fsl_queue->desc_pool)
1023 return fsl_qdma->desc_allocated;
1024
1025 INIT_LIST_HEAD(&fsl_queue->comp_free);
1026
1027 /*
1028 * The dma pool for queue command buffer
1029 */
1030 fsl_queue->comp_pool =
1031 dma_pool_create("comp_pool",
1032 chan->device->dev,
1033 FSL_QDMA_COMMAND_BUFFER_SIZE,
1034 64, 0);
1035 if (!fsl_queue->comp_pool)
1036 return -ENOMEM;
1037
1038 /*
1039 * The dma pool for Descriptor(SD/DD) buffer
1040 */
1041 fsl_queue->desc_pool =
1042 dma_pool_create("desc_pool",
1043 chan->device->dev,
1044 FSL_QDMA_DESCRIPTOR_BUFFER_SIZE,
1045 32, 0);
1046 if (!fsl_queue->desc_pool)
1047 goto err_desc_pool;
1048
1049 ret = fsl_qdma_pre_request_enqueue_desc(fsl_queue);
1050 if (ret) {
1051 dev_err(chan->device->dev,
1052 "failed to alloc dma buffer for S/G descriptor\n");
1053 goto err_mem;
1054 }
1055
1056 fsl_qdma->desc_allocated++;
1057 return fsl_qdma->desc_allocated;
1058
1059 err_mem:
1060 dma_pool_destroy(fsl_queue->desc_pool);
1061 err_desc_pool:
1062 dma_pool_destroy(fsl_queue->comp_pool);
1063 return -ENOMEM;
1064 }
1065
1066 static int fsl_qdma_probe(struct platform_device *pdev)
1067 {
1068 int ret, i;
1069 int blk_num, blk_off;
1070 u32 len, chans, queues;
1071 struct resource *res;
1072 struct fsl_qdma_chan *fsl_chan;
1073 struct fsl_qdma_engine *fsl_qdma;
1074 struct device_node *np = pdev->dev.of_node;
1075
1076 ret = of_property_read_u32(np, "dma-channels", &chans);
1077 if (ret) {
1078 dev_err(&pdev->dev, "Can't get dma-channels.\n");
1079 return ret;
1080 }
1081
1082 ret = of_property_read_u32(np, "block-offset", &blk_off);
1083 if (ret) {
1084 dev_err(&pdev->dev, "Can't get block-offset.\n");
1085 return ret;
1086 }
1087
1088 ret = of_property_read_u32(np, "block-number", &blk_num);
1089 if (ret) {
1090 dev_err(&pdev->dev, "Can't get block-number.\n");
1091 return ret;
1092 }
1093
1094 blk_num = min_t(int, blk_num, num_online_cpus());
1095
1096 len = sizeof(*fsl_qdma);
1097 fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1098 if (!fsl_qdma)
1099 return -ENOMEM;
1100
1101 len = sizeof(*fsl_chan) * chans;
1102 fsl_qdma->chans = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1103 if (!fsl_qdma->chans)
1104 return -ENOMEM;
1105
1106 len = sizeof(struct fsl_qdma_queue *) * blk_num;
1107 fsl_qdma->status = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1108 if (!fsl_qdma->status)
1109 return -ENOMEM;
1110
1111 len = sizeof(int) * blk_num;
1112 fsl_qdma->queue_irq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1113 if (!fsl_qdma->queue_irq)
1114 return -ENOMEM;
1115
1116 ret = of_property_read_u32(np, "fsl,dma-queues", &queues);
1117 if (ret) {
1118 dev_err(&pdev->dev, "Can't get queues.\n");
1119 return ret;
1120 }
1121
1122 fsl_qdma->desc_allocated = 0;
1123 fsl_qdma->n_chans = chans;
1124 fsl_qdma->n_queues = queues;
1125 fsl_qdma->block_number = blk_num;
1126 fsl_qdma->block_offset = blk_off;
1127
1128 mutex_init(&fsl_qdma->fsl_qdma_mutex);
1129
1130 for (i = 0; i < fsl_qdma->block_number; i++) {
1131 fsl_qdma->status[i] = fsl_qdma_prep_status_queue(pdev);
1132 if (!fsl_qdma->status[i])
1133 return -ENOMEM;
1134 }
1135 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1136 fsl_qdma->ctrl_base = devm_ioremap_resource(&pdev->dev, res);
1137 if (IS_ERR(fsl_qdma->ctrl_base))
1138 return PTR_ERR(fsl_qdma->ctrl_base);
1139
1140 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1141 fsl_qdma->status_base = devm_ioremap_resource(&pdev->dev, res);
1142 if (IS_ERR(fsl_qdma->status_base))
1143 return PTR_ERR(fsl_qdma->status_base);
1144
1145 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1146 fsl_qdma->block_base = devm_ioremap_resource(&pdev->dev, res);
1147 if (IS_ERR(fsl_qdma->block_base))
1148 return PTR_ERR(fsl_qdma->block_base);
1149 fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, fsl_qdma);
1150 if (!fsl_qdma->queue)
1151 return -ENOMEM;
1152
1153 ret = fsl_qdma_irq_init(pdev, fsl_qdma);
1154 if (ret)
1155 return ret;
1156
1157 fsl_qdma->irq_base = platform_get_irq_byname(pdev, "qdma-queue0");
1158 if (fsl_qdma->irq_base < 0)
1159 return fsl_qdma->irq_base;
1160
1161 fsl_qdma->feature = of_property_read_bool(np, "big-endian");
1162 INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels);
1163
1164 for (i = 0; i < fsl_qdma->n_chans; i++) {
1165 struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i];
1166
1167 fsl_chan->qdma = fsl_qdma;
1168 fsl_chan->queue = fsl_qdma->queue + i % (fsl_qdma->n_queues *
1169 fsl_qdma->block_number);
1170 fsl_chan->vchan.desc_free = fsl_qdma_free_desc;
1171 vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev);
1172 }
1173
1174 dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask);
1175
1176 fsl_qdma->dma_dev.dev = &pdev->dev;
1177 fsl_qdma->dma_dev.device_free_chan_resources =
1178 fsl_qdma_free_chan_resources;
1179 fsl_qdma->dma_dev.device_alloc_chan_resources =
1180 fsl_qdma_alloc_chan_resources;
1181 fsl_qdma->dma_dev.device_tx_status = dma_cookie_status;
1182 fsl_qdma->dma_dev.device_prep_dma_memcpy = fsl_qdma_prep_memcpy;
1183 fsl_qdma->dma_dev.device_issue_pending = fsl_qdma_issue_pending;
1184 fsl_qdma->dma_dev.device_synchronize = fsl_qdma_synchronize;
1185 fsl_qdma->dma_dev.device_terminate_all = fsl_qdma_terminate_all;
1186
1187 dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
1188
1189 platform_set_drvdata(pdev, fsl_qdma);
1190
1191 ret = dma_async_device_register(&fsl_qdma->dma_dev);
1192 if (ret) {
1193 dev_err(&pdev->dev,
1194 "Can't register NXP Layerscape qDMA engine.\n");
1195 return ret;
1196 }
1197
1198 ret = fsl_qdma_reg_init(fsl_qdma);
1199 if (ret) {
1200 dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n");
1201 return ret;
1202 }
1203
1204 return 0;
1205 }
1206
1207 static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
1208 {
1209 struct fsl_qdma_chan *chan, *_chan;
1210
1211 list_for_each_entry_safe(chan, _chan,
1212 &dmadev->channels, vchan.chan.device_node) {
1213 list_del(&chan->vchan.chan.device_node);
1214 tasklet_kill(&chan->vchan.task);
1215 }
1216 }
1217
1218 static int fsl_qdma_remove(struct platform_device *pdev)
1219 {
1220 int i;
1221 struct fsl_qdma_queue *status;
1222 struct device_node *np = pdev->dev.of_node;
1223 struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev);
1224
1225 fsl_qdma_irq_exit(pdev, fsl_qdma);
1226 fsl_qdma_cleanup_vchan(&fsl_qdma->dma_dev);
1227 of_dma_controller_free(np);
1228 dma_async_device_unregister(&fsl_qdma->dma_dev);
1229
1230 for (i = 0; i < fsl_qdma->block_number; i++) {
1231 status = fsl_qdma->status[i];
1232 dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) *
1233 status->n_cq, status->cq, status->bus_addr);
1234 }
1235 return 0;
1236 }
1237
1238 static const struct of_device_id fsl_qdma_dt_ids[] = {
1239 { .compatible = "fsl,ls1021a-qdma", },
1240 { /* sentinel */ }
1241 };
1242 MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids);
1243
1244 static struct platform_driver fsl_qdma_driver = {
1245 .driver = {
1246 .name = "fsl-qdma",
1247 .of_match_table = fsl_qdma_dt_ids,
1248 },
1249 .probe = fsl_qdma_probe,
1250 .remove = fsl_qdma_remove,
1251 };
1252
1253 module_platform_driver(fsl_qdma_driver);
1254
1255 MODULE_ALIAS("platform:fsl-qdma");
1256 MODULE_LICENSE("GPL v2");
1257 MODULE_DESCRIPTION("NXP Layerscape qDMA engine driver");
Linux with added FPC-III support