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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
117/* Field definition for safe loop count*/
118#define FSL_QDMA_HALT_COUNT 1500
119#define FSL_QDMA_MAX_SIZE 16385
120#define FSL_QDMA_COMP_TIMEOUT 1000
121#define FSL_COMMAND_QUEUE_OVERFLLOW 10
122
123#define FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma_engine, x) \
124 (((fsl_qdma_engine)->block_offset) * (x))
125
126/**
127 * struct fsl_qdma_format - This is the struct holding describing compound
128 * descriptor format with qDMA.
129 * @status: Command status and enqueue status notification.
130 * @cfg: Frame offset and frame format.
131 * @addr_lo: Holding the compound descriptor of the lower
132 * 32-bits address in memory 40-bit address.
133 * @addr_hi: Same as above member, but point high 8-bits in
134 * memory 40-bit address.
135 * @__reserved1: Reserved field.
136 * @cfg8b_w1: Compound descriptor command queue origin produced
137 * by qDMA and dynamic debug field.
138 * @data Pointer to the memory 40-bit address, describes DMA
139 * source information and DMA destination information.
140 */
141struct fsl_qdma_format {
142 __le32 status;
143 __le32 cfg;
144 union {
145 struct {
146 __le32 addr_lo;
147 u8 addr_hi;
148 u8 __reserved1[2];
149 u8 cfg8b_w1;
150 } __packed;
151 __le64 data;
152 };
153} __packed;
154
155/* qDMA status notification pre information */
156struct fsl_pre_status {
157 u64 addr;
158 u8 queue;
159};
160
161static DEFINE_PER_CPU(struct fsl_pre_status, pre);
162
163struct fsl_qdma_chan {
164 struct virt_dma_chan vchan;
165 struct virt_dma_desc vdesc;
166 enum dma_status status;
167 struct fsl_qdma_engine *qdma;
168 struct fsl_qdma_queue *queue;
169};
170
171struct fsl_qdma_queue {
172 struct fsl_qdma_format *virt_head;
173 struct fsl_qdma_format *virt_tail;
174 struct list_head comp_used;
175 struct list_head comp_free;
176 struct dma_pool *comp_pool;
177 struct dma_pool *desc_pool;
178 spinlock_t queue_lock;
179 dma_addr_t bus_addr;
180 u32 n_cq;
181 u32 id;
182 struct fsl_qdma_format *cq;
183 void __iomem *block_base;
184};
185
186struct fsl_qdma_comp {
187 dma_addr_t bus_addr;
188 dma_addr_t desc_bus_addr;
189 struct fsl_qdma_format *virt_addr;
190 struct fsl_qdma_format *desc_virt_addr;
191 struct fsl_qdma_chan *qchan;
192 struct virt_dma_desc vdesc;
193 struct list_head list;
194};
195
196struct fsl_qdma_engine {
197 struct dma_device dma_dev;
198 void __iomem *ctrl_base;
199 void __iomem *status_base;
200 void __iomem *block_base;
201 u32 n_chans;
202 u32 n_queues;
203 struct mutex fsl_qdma_mutex;
204 int error_irq;
205 int *queue_irq;
206 u32 feature;
207 struct fsl_qdma_queue *queue;
208 struct fsl_qdma_queue **status;
209 struct fsl_qdma_chan *chans;
210 int block_number;
211 int block_offset;
212 int irq_base;
213 int desc_allocated;
214
215};
216
217static inline u64
218qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
219{
220 return le64_to_cpu(ccdf->data) & (U64_MAX >> 24);
221}
222
223static inline void
224qdma_desc_addr_set64(struct fsl_qdma_format *ccdf, u64 addr)
225{
226 ccdf->addr_hi = upper_32_bits(addr);
227 ccdf->addr_lo = cpu_to_le32(lower_32_bits(addr));
228}
229
230static inline u8
231qdma_ccdf_get_queue(const struct fsl_qdma_format *ccdf)
232{
233 return ccdf->cfg8b_w1 & U8_MAX;
234}
235
236static inline int
237qdma_ccdf_get_offset(const struct fsl_qdma_format *ccdf)
238{
239 return (le32_to_cpu(ccdf->cfg) & QDMA_CCDF_MASK) >> QDMA_CCDF_OFFSET;
240}
241
242static inline void
243qdma_ccdf_set_format(struct fsl_qdma_format *ccdf, int offset)
244{
245 ccdf->cfg = cpu_to_le32(QDMA_CCDF_FOTMAT | offset);
246}
247
248static inline int
249qdma_ccdf_get_status(const struct fsl_qdma_format *ccdf)
250{
251 return (le32_to_cpu(ccdf->status) & QDMA_CCDF_MASK) >> QDMA_CCDF_STATUS;
252}
253
254static inline void
255qdma_ccdf_set_ser(struct fsl_qdma_format *ccdf, int status)
256{
257 ccdf->status = cpu_to_le32(QDMA_CCDF_SER | status);
258}
259
260static inline void qdma_csgf_set_len(struct fsl_qdma_format *csgf, int len)
261{
262 csgf->cfg = cpu_to_le32(len & QDMA_SG_LEN_MASK);
263}
264
265static inline void qdma_csgf_set_f(struct fsl_qdma_format *csgf, int len)
266{
267 csgf->cfg = cpu_to_le32(QDMA_SG_FIN | (len & QDMA_SG_LEN_MASK));
268}
269
270static u32 qdma_readl(struct fsl_qdma_engine *qdma, void __iomem *addr)
271{
272 return FSL_DMA_IN(qdma, addr, 32);
273}
274
275static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
276 void __iomem *addr)
277{
278 FSL_DMA_OUT(qdma, addr, val, 32);
279}
280
281static struct fsl_qdma_chan *to_fsl_qdma_chan(struct dma_chan *chan)
282{
283 return container_of(chan, struct fsl_qdma_chan, vchan.chan);
284}
285
286static struct fsl_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
287{
288 return container_of(vd, struct fsl_qdma_comp, vdesc);
289}
290
291static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
292{
293 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
294 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
295 struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
296 struct fsl_qdma_comp *comp_temp, *_comp_temp;
297 unsigned long flags;
298 LIST_HEAD(head);
299
300 spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
301 vchan_get_all_descriptors(&fsl_chan->vchan, &head);
302 spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
303
304 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
305
306 if (!fsl_queue->comp_pool && !fsl_queue->comp_pool)
307 return;
308
309 list_for_each_entry_safe(comp_temp, _comp_temp,
310 &fsl_queue->comp_used, list) {
311 dma_pool_free(fsl_queue->comp_pool,
312 comp_temp->virt_addr,
313 comp_temp->bus_addr);
314 dma_pool_free(fsl_queue->desc_pool,
315 comp_temp->desc_virt_addr,
316 comp_temp->desc_bus_addr);
317 list_del(&comp_temp->list);
318 kfree(comp_temp);
319 }
320
321 list_for_each_entry_safe(comp_temp, _comp_temp,
322 &fsl_queue->comp_free, list) {
323 dma_pool_free(fsl_queue->comp_pool,
324 comp_temp->virt_addr,
325 comp_temp->bus_addr);
326 dma_pool_free(fsl_queue->desc_pool,
327 comp_temp->desc_virt_addr,
328 comp_temp->desc_bus_addr);
329 list_del(&comp_temp->list);
330 kfree(comp_temp);
331 }
332
333 dma_pool_destroy(fsl_queue->comp_pool);
334 dma_pool_destroy(fsl_queue->desc_pool);
335
336 fsl_qdma->desc_allocated--;
337 fsl_queue->comp_pool = NULL;
338 fsl_queue->desc_pool = NULL;
339}
340
341static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
342 dma_addr_t dst, dma_addr_t src, u32 len)
343{
344 struct fsl_qdma_format *sdf, *ddf;
345 struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
346
347 ccdf = fsl_comp->virt_addr;
348 csgf_desc = fsl_comp->virt_addr + 1;
349 csgf_src = fsl_comp->virt_addr + 2;
350 csgf_dest = fsl_comp->virt_addr + 3;
351 sdf = fsl_comp->desc_virt_addr;
352 ddf = fsl_comp->desc_virt_addr + 1;
353
354 memset(fsl_comp->virt_addr, 0, FSL_QDMA_COMMAND_BUFFER_SIZE);
355 memset(fsl_comp->desc_virt_addr, 0, FSL_QDMA_DESCRIPTOR_BUFFER_SIZE);
356 /* Head Command Descriptor(Frame Descriptor) */
357 qdma_desc_addr_set64(ccdf, fsl_comp->bus_addr + 16);
358 qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
359 qdma_ccdf_set_ser(ccdf, qdma_ccdf_get_status(ccdf));
360 /* Status notification is enqueued to status queue. */
361 /* Compound Command Descriptor(Frame List Table) */
362 qdma_desc_addr_set64(csgf_desc, fsl_comp->desc_bus_addr);
363 /* It must be 32 as Compound S/G Descriptor */
364 qdma_csgf_set_len(csgf_desc, 32);
365 qdma_desc_addr_set64(csgf_src, src);
366 qdma_csgf_set_len(csgf_src, len);
367 qdma_desc_addr_set64(csgf_dest, dst);
368 qdma_csgf_set_len(csgf_dest, len);
369 /* This entry is the last entry. */
370 qdma_csgf_set_f(csgf_dest, len);
371 /* Descriptor Buffer */
372 sdf->data =
373 cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
374 FSL_QDMA_CMD_RWTTYPE_OFFSET);
375 ddf->data =
376 cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
377 FSL_QDMA_CMD_RWTTYPE_OFFSET);
378 ddf->data |=
379 cpu_to_le64(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
380}
381
382/*
383 * Pre-request full command descriptor for enqueue.
384 */
385static int fsl_qdma_pre_request_enqueue_desc(struct fsl_qdma_queue *queue)
386{
387 int i;
388 struct fsl_qdma_comp *comp_temp, *_comp_temp;
389
390 for (i = 0; i < queue->n_cq + FSL_COMMAND_QUEUE_OVERFLLOW; i++) {
391 comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
392 if (!comp_temp)
393 goto err_alloc;
394 comp_temp->virt_addr =
395 dma_pool_alloc(queue->comp_pool, GFP_KERNEL,
396 &comp_temp->bus_addr);
397 if (!comp_temp->virt_addr)
398 goto err_dma_alloc;
399
400 comp_temp->desc_virt_addr =
401 dma_pool_alloc(queue->desc_pool, GFP_KERNEL,
402 &comp_temp->desc_bus_addr);
403 if (!comp_temp->desc_virt_addr)
404 goto err_desc_dma_alloc;
405
406 list_add_tail(&comp_temp->list, &queue->comp_free);
407 }
408
409 return 0;
410
411err_desc_dma_alloc:
412 dma_pool_free(queue->comp_pool, comp_temp->virt_addr,
413 comp_temp->bus_addr);
414
415err_dma_alloc:
416 kfree(comp_temp);
417
418err_alloc:
419 list_for_each_entry_safe(comp_temp, _comp_temp,
420 &queue->comp_free, list) {
421 if (comp_temp->virt_addr)
422 dma_pool_free(queue->comp_pool,
423 comp_temp->virt_addr,
424 comp_temp->bus_addr);
425 if (comp_temp->desc_virt_addr)
426 dma_pool_free(queue->desc_pool,
427 comp_temp->desc_virt_addr,
428 comp_temp->desc_bus_addr);
429
430 list_del(&comp_temp->list);
431 kfree(comp_temp);
432 }
433
434 return -ENOMEM;
435}
436
437/*
438 * Request a command descriptor for enqueue.
439 */
440static struct fsl_qdma_comp
441*fsl_qdma_request_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
442{
443 unsigned long flags;
444 struct fsl_qdma_comp *comp_temp;
445 int timeout = FSL_QDMA_COMP_TIMEOUT;
446 struct fsl_qdma_queue *queue = fsl_chan->queue;
447
448 while (timeout--) {
449 spin_lock_irqsave(&queue->queue_lock, flags);
450 if (!list_empty(&queue->comp_free)) {
451 comp_temp = list_first_entry(&queue->comp_free,
452 struct fsl_qdma_comp,
453 list);
454 list_del(&comp_temp->list);
455
456 spin_unlock_irqrestore(&queue->queue_lock, flags);
457 comp_temp->qchan = fsl_chan;
458 return comp_temp;
459 }
460 spin_unlock_irqrestore(&queue->queue_lock, flags);
461 udelay(1);
462 }
463
464 return NULL;
465}
466
467static struct fsl_qdma_queue
468*fsl_qdma_alloc_queue_resources(struct platform_device *pdev,
469 struct fsl_qdma_engine *fsl_qdma)
470{
471 int ret, len, i, j;
472 int queue_num, block_number;
473 unsigned int queue_size[FSL_QDMA_QUEUE_MAX];
474 struct fsl_qdma_queue *queue_head, *queue_temp;
475
476 queue_num = fsl_qdma->n_queues;
477 block_number = fsl_qdma->block_number;
478
479 if (queue_num > FSL_QDMA_QUEUE_MAX)
480 queue_num = FSL_QDMA_QUEUE_MAX;
481 len = sizeof(*queue_head) * queue_num * block_number;
482 queue_head = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
483 if (!queue_head)
484 return NULL;
485
486 ret = device_property_read_u32_array(&pdev->dev, "queue-sizes",
487 queue_size, queue_num);
488 if (ret) {
489 dev_err(&pdev->dev, "Can't get queue-sizes.\n");
490 return NULL;
491 }
492 for (j = 0; j < block_number; j++) {
493 for (i = 0; i < queue_num; i++) {
494 if (queue_size[i] > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
495 queue_size[i] < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
496 dev_err(&pdev->dev,
497 "Get wrong queue-sizes.\n");
498 return NULL;
499 }
500 queue_temp = queue_head + i + (j * queue_num);
501
502 queue_temp->cq =
503 dma_alloc_coherent(&pdev->dev,
504 sizeof(struct fsl_qdma_format) *
505 queue_size[i],
506 &queue_temp->bus_addr,
507 GFP_KERNEL);
508 if (!queue_temp->cq)
509 return NULL;
510 queue_temp->block_base = fsl_qdma->block_base +
511 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
512 queue_temp->n_cq = queue_size[i];
513 queue_temp->id = i;
514 queue_temp->virt_head = queue_temp->cq;
515 queue_temp->virt_tail = queue_temp->cq;
516 /*
517 * List for queue command buffer
518 */
519 INIT_LIST_HEAD(&queue_temp->comp_used);
520 spin_lock_init(&queue_temp->queue_lock);
521 }
522 }
523 return queue_head;
524}
525
526static struct fsl_qdma_queue
527*fsl_qdma_prep_status_queue(struct platform_device *pdev)
528{
529 int ret;
530 unsigned int status_size;
531 struct fsl_qdma_queue *status_head;
532 struct device_node *np = pdev->dev.of_node;
533
534 ret = of_property_read_u32(np, "status-sizes", &status_size);
535 if (ret) {
536 dev_err(&pdev->dev, "Can't get status-sizes.\n");
537 return NULL;
538 }
539 if (status_size > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
540 status_size < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
541 dev_err(&pdev->dev, "Get wrong status_size.\n");
542 return NULL;
543 }
544 status_head = devm_kzalloc(&pdev->dev,
545 sizeof(*status_head), GFP_KERNEL);
546 if (!status_head)
547 return NULL;
548
549 /*
550 * Buffer for queue command
551 */
552 status_head->cq = dma_alloc_coherent(&pdev->dev,
553 sizeof(struct fsl_qdma_format) *
554 status_size,
555 &status_head->bus_addr,
556 GFP_KERNEL);
557 if (!status_head->cq) {
558 devm_kfree(&pdev->dev, status_head);
559 return NULL;
560 }
561 status_head->n_cq = status_size;
562 status_head->virt_head = status_head->cq;
563 status_head->virt_tail = status_head->cq;
564 status_head->comp_pool = NULL;
565
566 return status_head;
567}
568
569static int fsl_qdma_halt(struct fsl_qdma_engine *fsl_qdma)
570{
571 u32 reg;
572 int i, j, count = FSL_QDMA_HALT_COUNT;
573 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
574
575 /* Disable the command queue and wait for idle state. */
576 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
577 reg |= FSL_QDMA_DMR_DQD;
578 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
579 for (j = 0; j < fsl_qdma->block_number; j++) {
580 block = fsl_qdma->block_base +
581 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
582 for (i = 0; i < FSL_QDMA_QUEUE_NUM_MAX; i++)
583 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQMR(i));
584 }
585 while (1) {
586 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DSR);
587 if (!(reg & FSL_QDMA_DSR_DB))
588 break;
589 if (count-- < 0)
590 return -EBUSY;
591 udelay(100);
592 }
593
594 for (j = 0; j < fsl_qdma->block_number; j++) {
595 block = fsl_qdma->block_base +
596 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
597
598 /* Disable status queue. */
599 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BSQMR);
600
601 /*
602 * clear the command queue interrupt detect register for
603 * all queues.
604 */
605 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
606 block + FSL_QDMA_BCQIDR(0));
607 }
608
609 return 0;
610}
611
612static int
613fsl_qdma_queue_transfer_complete(struct fsl_qdma_engine *fsl_qdma,
614 void *block,
615 int id)
616{
617 bool duplicate;
618 u32 reg, i, count;
619 struct fsl_qdma_queue *temp_queue;
620 struct fsl_qdma_format *status_addr;
621 struct fsl_qdma_comp *fsl_comp = NULL;
622 struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
623 struct fsl_qdma_queue *fsl_status = fsl_qdma->status[id];
624
625 count = FSL_QDMA_MAX_SIZE;
626
627 while (count--) {
628 duplicate = 0;
629 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
630 if (reg & FSL_QDMA_BSQSR_QE)
631 return 0;
632
633 status_addr = fsl_status->virt_head;
634
635 if (qdma_ccdf_get_queue(status_addr) ==
636 __this_cpu_read(pre.queue) &&
637 qdma_ccdf_addr_get64(status_addr) ==
638 __this_cpu_read(pre.addr))
639 duplicate = 1;
640 i = qdma_ccdf_get_queue(status_addr) +
641 id * fsl_qdma->n_queues;
642 __this_cpu_write(pre.addr, qdma_ccdf_addr_get64(status_addr));
643 __this_cpu_write(pre.queue, qdma_ccdf_get_queue(status_addr));
644 temp_queue = fsl_queue + i;
645
646 spin_lock(&temp_queue->queue_lock);
647 if (list_empty(&temp_queue->comp_used)) {
648 if (!duplicate) {
649 spin_unlock(&temp_queue->queue_lock);
650 return -EAGAIN;
651 }
652 } else {
653 fsl_comp = list_first_entry(&temp_queue->comp_used,
654 struct fsl_qdma_comp, list);
655 if (fsl_comp->bus_addr + 16 !=
656 __this_cpu_read(pre.addr)) {
657 if (!duplicate) {
658 spin_unlock(&temp_queue->queue_lock);
659 return -EAGAIN;
660 }
661 }
662 }
663
664 if (duplicate) {
665 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
666 reg |= FSL_QDMA_BSQMR_DI;
667 qdma_desc_addr_set64(status_addr, 0x0);
668 fsl_status->virt_head++;
669 if (fsl_status->virt_head == fsl_status->cq
670 + fsl_status->n_cq)
671 fsl_status->virt_head = fsl_status->cq;
672 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
673 spin_unlock(&temp_queue->queue_lock);
674 continue;
675 }
676 list_del(&fsl_comp->list);
677
678 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
679 reg |= FSL_QDMA_BSQMR_DI;
680 qdma_desc_addr_set64(status_addr, 0x0);
681 fsl_status->virt_head++;
682 if (fsl_status->virt_head == fsl_status->cq + fsl_status->n_cq)
683 fsl_status->virt_head = fsl_status->cq;
684 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
685 spin_unlock(&temp_queue->queue_lock);
686
687 spin_lock(&fsl_comp->qchan->vchan.lock);
688 vchan_cookie_complete(&fsl_comp->vdesc);
689 fsl_comp->qchan->status = DMA_COMPLETE;
690 spin_unlock(&fsl_comp->qchan->vchan.lock);
691 }
692
693 return 0;
694}
695
696static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
697{
698 unsigned int intr;
699 struct fsl_qdma_engine *fsl_qdma = dev_id;
700 void __iomem *status = fsl_qdma->status_base;
701
702 intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
703
704 if (intr) {
705 dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
706 return IRQ_NONE;
707 }
708
709 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
710 return IRQ_HANDLED;
711}
712
713static 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
750static int
751fsl_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 dev_err(&pdev->dev, "Can't get qdma controller irq.\n");
763 return fsl_qdma->error_irq;
764 }
765
766 ret = devm_request_irq(&pdev->dev, fsl_qdma->error_irq,
767 fsl_qdma_error_handler, 0,
768 "qDMA error", fsl_qdma);
769 if (ret) {
770 dev_err(&pdev->dev, "Can't register qDMA controller IRQ.\n");
771 return ret;
772 }
773
774 for (i = 0; i < fsl_qdma->block_number; i++) {
775 sprintf(irq_name, "qdma-queue%d", i);
776 fsl_qdma->queue_irq[i] =
777 platform_get_irq_byname(pdev, irq_name);
778
779 if (fsl_qdma->queue_irq[i] < 0) {
780 dev_err(&pdev->dev,
781 "Can't get qdma queue %d irq.\n", i);
782 return fsl_qdma->queue_irq[i];
783 }
784
785 ret = devm_request_irq(&pdev->dev,
786 fsl_qdma->queue_irq[i],
787 fsl_qdma_queue_handler,
788 0,
789 "qDMA queue",
790 fsl_qdma);
791 if (ret) {
792 dev_err(&pdev->dev,
793 "Can't register qDMA queue IRQ.\n");
794 return ret;
795 }
796
797 cpu = i % num_online_cpus();
798 ret = irq_set_affinity_hint(fsl_qdma->queue_irq[i],
799 get_cpu_mask(cpu));
800 if (ret) {
801 dev_err(&pdev->dev,
802 "Can't set cpu %d affinity to IRQ %d.\n",
803 cpu,
804 fsl_qdma->queue_irq[i]);
805 return ret;
806 }
807 }
808
809 return 0;
810}
811
812static void fsl_qdma_irq_exit(struct platform_device *pdev,
813 struct fsl_qdma_engine *fsl_qdma)
814{
815 int i;
816
817 devm_free_irq(&pdev->dev, fsl_qdma->error_irq, fsl_qdma);
818 for (i = 0; i < fsl_qdma->block_number; i++)
819 devm_free_irq(&pdev->dev, fsl_qdma->queue_irq[i], fsl_qdma);
820}
821
822static int fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma)
823{
824 u32 reg;
825 int i, j, ret;
826 struct fsl_qdma_queue *temp;
827 void __iomem *status = fsl_qdma->status_base;
828 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
829 struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
830
831 /* Try to halt the qDMA engine first. */
832 ret = fsl_qdma_halt(fsl_qdma);
833 if (ret) {
834 dev_err(fsl_qdma->dma_dev.dev, "DMA halt failed!");
835 return ret;
836 }
837
838 for (i = 0; i < fsl_qdma->block_number; i++) {
839 /*
840 * Clear the command queue interrupt detect register for
841 * all queues.
842 */
843
844 block = fsl_qdma->block_base +
845 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, i);
846 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
847 block + FSL_QDMA_BCQIDR(0));
848 }
849
850 for (j = 0; j < fsl_qdma->block_number; j++) {
851 block = fsl_qdma->block_base +
852 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
853 for (i = 0; i < fsl_qdma->n_queues; i++) {
854 temp = fsl_queue + i + (j * fsl_qdma->n_queues);
855 /*
856 * Initialize Command Queue registers to
857 * point to the first
858 * command descriptor in memory.
859 * Dequeue Pointer Address Registers
860 * Enqueue Pointer Address Registers
861 */
862
863 qdma_writel(fsl_qdma, temp->bus_addr,
864 block + FSL_QDMA_BCQDPA_SADDR(i));
865 qdma_writel(fsl_qdma, temp->bus_addr,
866 block + FSL_QDMA_BCQEPA_SADDR(i));
867
868 /* Initialize the queue mode. */
869 reg = FSL_QDMA_BCQMR_EN;
870 reg |= FSL_QDMA_BCQMR_CD_THLD(ilog2(temp->n_cq) - 4);
871 reg |= FSL_QDMA_BCQMR_CQ_SIZE(ilog2(temp->n_cq) - 6);
872 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BCQMR(i));
873 }
874
875 /*
876 * Workaround for erratum: ERR010812.
877 * We must enable XOFF to avoid the enqueue rejection occurs.
878 * Setting SQCCMR ENTER_WM to 0x20.
879 */
880
881 qdma_writel(fsl_qdma, FSL_QDMA_SQCCMR_ENTER_WM,
882 block + FSL_QDMA_SQCCMR);
883
884 /*
885 * Initialize status queue registers to point to the first
886 * command descriptor in memory.
887 * Dequeue Pointer Address Registers
888 * Enqueue Pointer Address Registers
889 */
890
891 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
892 block + FSL_QDMA_SQEPAR);
893 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
894 block + FSL_QDMA_SQDPAR);
895 /* Initialize status queue interrupt. */
896 qdma_writel(fsl_qdma, FSL_QDMA_BCQIER_CQTIE,
897 block + FSL_QDMA_BCQIER(0));
898 qdma_writel(fsl_qdma, FSL_QDMA_BSQICR_ICEN |
899 FSL_QDMA_BSQICR_ICST(5) | 0x8000,
900 block + FSL_QDMA_BSQICR);
901 qdma_writel(fsl_qdma, FSL_QDMA_CQIER_MEIE |
902 FSL_QDMA_CQIER_TEIE,
903 block + FSL_QDMA_CQIER);
904
905 /* Initialize the status queue mode. */
906 reg = FSL_QDMA_BSQMR_EN;
907 reg |= FSL_QDMA_BSQMR_CQ_SIZE(ilog2
908 (fsl_qdma->status[j]->n_cq) - 6);
909
910 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
911 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
912 }
913
914 /* Initialize controller interrupt register. */
915 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
916 qdma_writel(fsl_qdma, FSL_QDMA_DEIER_CLEAR, status + FSL_QDMA_DEIER);
917
918 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
919 reg &= ~FSL_QDMA_DMR_DQD;
920 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
921
922 return 0;
923}
924
925static struct dma_async_tx_descriptor *
926fsl_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
927 dma_addr_t src, size_t len, unsigned long flags)
928{
929 struct fsl_qdma_comp *fsl_comp;
930 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
931
932 fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan);
933
934 if (!fsl_comp)
935 return NULL;
936
937 fsl_qdma_comp_fill_memcpy(fsl_comp, dst, src, len);
938
939 return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
940}
941
942static void fsl_qdma_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
943{
944 u32 reg;
945 struct virt_dma_desc *vdesc;
946 struct fsl_qdma_comp *fsl_comp;
947 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
948 void __iomem *block = fsl_queue->block_base;
949
950 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQSR(fsl_queue->id));
951 if (reg & (FSL_QDMA_BCQSR_QF | FSL_QDMA_BCQSR_XOFF))
952 return;
953 vdesc = vchan_next_desc(&fsl_chan->vchan);
954 if (!vdesc)
955 return;
956 list_del(&vdesc->node);
957 fsl_comp = to_fsl_qdma_comp(vdesc);
958
959 memcpy(fsl_queue->virt_head++,
960 fsl_comp->virt_addr, sizeof(struct fsl_qdma_format));
961 if (fsl_queue->virt_head == fsl_queue->cq + fsl_queue->n_cq)
962 fsl_queue->virt_head = fsl_queue->cq;
963
964 list_add_tail(&fsl_comp->list, &fsl_queue->comp_used);
965 barrier();
966 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQMR(fsl_queue->id));
967 reg |= FSL_QDMA_BCQMR_EI;
968 qdma_writel(fsl_chan->qdma, reg, block + FSL_QDMA_BCQMR(fsl_queue->id));
969 fsl_chan->status = DMA_IN_PROGRESS;
970}
971
972static void fsl_qdma_free_desc(struct virt_dma_desc *vdesc)
973{
974 unsigned long flags;
975 struct fsl_qdma_comp *fsl_comp;
976 struct fsl_qdma_queue *fsl_queue;
977
978 fsl_comp = to_fsl_qdma_comp(vdesc);
979 fsl_queue = fsl_comp->qchan->queue;
980
981 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
982 list_add_tail(&fsl_comp->list, &fsl_queue->comp_free);
983 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
984}
985
986static void fsl_qdma_issue_pending(struct dma_chan *chan)
987{
988 unsigned long flags;
989 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
990 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
991
992 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
993 spin_lock(&fsl_chan->vchan.lock);
994 if (vchan_issue_pending(&fsl_chan->vchan))
995 fsl_qdma_enqueue_desc(fsl_chan);
996 spin_unlock(&fsl_chan->vchan.lock);
997 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
998}
999
1000static void fsl_qdma_synchronize(struct dma_chan *chan)
1001{
1002 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1003
1004 vchan_synchronize(&fsl_chan->vchan);
1005}
1006
1007static int fsl_qdma_terminate_all(struct dma_chan *chan)
1008{
1009 LIST_HEAD(head);
1010 unsigned long flags;
1011 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1012
1013 spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
1014 vchan_get_all_descriptors(&fsl_chan->vchan, &head);
1015 spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
1016 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
1017 return 0;
1018}
1019
1020static int fsl_qdma_alloc_chan_resources(struct dma_chan *chan)
1021{
1022 int ret;
1023 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1024 struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
1025 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
1026
1027 if (fsl_queue->comp_pool && fsl_queue->desc_pool)
1028 return fsl_qdma->desc_allocated;
1029
1030 INIT_LIST_HEAD(&fsl_queue->comp_free);
1031
1032 /*
1033 * The dma pool for queue command buffer
1034 */
1035 fsl_queue->comp_pool =
1036 dma_pool_create("comp_pool",
1037 chan->device->dev,
1038 FSL_QDMA_COMMAND_BUFFER_SIZE,
1039 64, 0);
1040 if (!fsl_queue->comp_pool)
1041 return -ENOMEM;
1042
1043 /*
1044 * The dma pool for Descriptor(SD/DD) buffer
1045 */
1046 fsl_queue->desc_pool =
1047 dma_pool_create("desc_pool",
1048 chan->device->dev,
1049 FSL_QDMA_DESCRIPTOR_BUFFER_SIZE,
1050 32, 0);
1051 if (!fsl_queue->desc_pool)
1052 goto err_desc_pool;
1053
1054 ret = fsl_qdma_pre_request_enqueue_desc(fsl_queue);
1055 if (ret) {
1056 dev_err(chan->device->dev,
1057 "failed to alloc dma buffer for S/G descriptor\n");
1058 goto err_mem;
1059 }
1060
1061 fsl_qdma->desc_allocated++;
1062 return fsl_qdma->desc_allocated;
1063
1064err_mem:
1065 dma_pool_destroy(fsl_queue->desc_pool);
1066err_desc_pool:
1067 dma_pool_destroy(fsl_queue->comp_pool);
1068 return -ENOMEM;
1069}
1070
1071static int fsl_qdma_probe(struct platform_device *pdev)
1072{
1073 int ret, i;
1074 int blk_num, blk_off;
1075 u32 len, chans, queues;
1076 struct resource *res;
1077 struct fsl_qdma_chan *fsl_chan;
1078 struct fsl_qdma_engine *fsl_qdma;
1079 struct device_node *np = pdev->dev.of_node;
1080
1081 ret = of_property_read_u32(np, "dma-channels", &chans);
1082 if (ret) {
1083 dev_err(&pdev->dev, "Can't get dma-channels.\n");
1084 return ret;
1085 }
1086
1087 ret = of_property_read_u32(np, "block-offset", &blk_off);
1088 if (ret) {
1089 dev_err(&pdev->dev, "Can't get block-offset.\n");
1090 return ret;
1091 }
1092
1093 ret = of_property_read_u32(np, "block-number", &blk_num);
1094 if (ret) {
1095 dev_err(&pdev->dev, "Can't get block-number.\n");
1096 return ret;
1097 }
1098
1099 blk_num = min_t(int, blk_num, num_online_cpus());
1100
1101 len = sizeof(*fsl_qdma);
1102 fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1103 if (!fsl_qdma)
1104 return -ENOMEM;
1105
1106 len = sizeof(*fsl_chan) * chans;
1107 fsl_qdma->chans = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1108 if (!fsl_qdma->chans)
1109 return -ENOMEM;
1110
1111 len = sizeof(struct fsl_qdma_queue *) * blk_num;
1112 fsl_qdma->status = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1113 if (!fsl_qdma->status)
1114 return -ENOMEM;
1115
1116 len = sizeof(int) * blk_num;
1117 fsl_qdma->queue_irq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1118 if (!fsl_qdma->queue_irq)
1119 return -ENOMEM;
1120
1121 ret = of_property_read_u32(np, "fsl,dma-queues", &queues);
1122 if (ret) {
1123 dev_err(&pdev->dev, "Can't get queues.\n");
1124 return ret;
1125 }
1126
1127 fsl_qdma->desc_allocated = 0;
1128 fsl_qdma->n_chans = chans;
1129 fsl_qdma->n_queues = queues;
1130 fsl_qdma->block_number = blk_num;
1131 fsl_qdma->block_offset = blk_off;
1132
1133 mutex_init(&fsl_qdma->fsl_qdma_mutex);
1134
1135 for (i = 0; i < fsl_qdma->block_number; i++) {
1136 fsl_qdma->status[i] = fsl_qdma_prep_status_queue(pdev);
1137 if (!fsl_qdma->status[i])
1138 return -ENOMEM;
1139 }
1140 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1141 fsl_qdma->ctrl_base = devm_ioremap_resource(&pdev->dev, res);
1142 if (IS_ERR(fsl_qdma->ctrl_base))
1143 return PTR_ERR(fsl_qdma->ctrl_base);
1144
1145 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1146 fsl_qdma->status_base = devm_ioremap_resource(&pdev->dev, res);
1147 if (IS_ERR(fsl_qdma->status_base))
1148 return PTR_ERR(fsl_qdma->status_base);
1149
1150 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1151 fsl_qdma->block_base = devm_ioremap_resource(&pdev->dev, res);
1152 if (IS_ERR(fsl_qdma->block_base))
1153 return PTR_ERR(fsl_qdma->block_base);
1154 fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, fsl_qdma);
1155 if (!fsl_qdma->queue)
1156 return -ENOMEM;
1157
1158 ret = fsl_qdma_irq_init(pdev, fsl_qdma);
1159 if (ret)
1160 return ret;
1161
1162 fsl_qdma->irq_base = platform_get_irq_byname(pdev, "qdma-queue0");
1163 fsl_qdma->feature = of_property_read_bool(np, "big-endian");
1164 INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels);
1165
1166 for (i = 0; i < fsl_qdma->n_chans; i++) {
1167 struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i];
1168
1169 fsl_chan->qdma = fsl_qdma;
1170 fsl_chan->queue = fsl_qdma->queue + i % (fsl_qdma->n_queues *
1171 fsl_qdma->block_number);
1172 fsl_chan->vchan.desc_free = fsl_qdma_free_desc;
1173 vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev);
1174 }
1175
1176 dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask);
1177
1178 fsl_qdma->dma_dev.dev = &pdev->dev;
1179 fsl_qdma->dma_dev.device_free_chan_resources =
1180 fsl_qdma_free_chan_resources;
1181 fsl_qdma->dma_dev.device_alloc_chan_resources =
1182 fsl_qdma_alloc_chan_resources;
1183 fsl_qdma->dma_dev.device_tx_status = dma_cookie_status;
1184 fsl_qdma->dma_dev.device_prep_dma_memcpy = fsl_qdma_prep_memcpy;
1185 fsl_qdma->dma_dev.device_issue_pending = fsl_qdma_issue_pending;
1186 fsl_qdma->dma_dev.device_synchronize = fsl_qdma_synchronize;
1187 fsl_qdma->dma_dev.device_terminate_all = fsl_qdma_terminate_all;
1188
1189 dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
1190
1191 platform_set_drvdata(pdev, fsl_qdma);
1192
1193 ret = dma_async_device_register(&fsl_qdma->dma_dev);
1194 if (ret) {
1195 dev_err(&pdev->dev,
1196 "Can't register NXP Layerscape qDMA engine.\n");
1197 return ret;
1198 }
1199
1200 ret = fsl_qdma_reg_init(fsl_qdma);
1201 if (ret) {
1202 dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n");
1203 return ret;
1204 }
1205
1206 return 0;
1207}
1208
1209static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
1210{
1211 struct fsl_qdma_chan *chan, *_chan;
1212
1213 list_for_each_entry_safe(chan, _chan,
1214 &dmadev->channels, vchan.chan.device_node) {
1215 list_del(&chan->vchan.chan.device_node);
1216 tasklet_kill(&chan->vchan.task);
1217 }
1218}
1219
1220static int fsl_qdma_remove(struct platform_device *pdev)
1221{
1222 int i;
1223 struct fsl_qdma_queue *status;
1224 struct device_node *np = pdev->dev.of_node;
1225 struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev);
1226
1227 fsl_qdma_irq_exit(pdev, fsl_qdma);
1228 fsl_qdma_cleanup_vchan(&fsl_qdma->dma_dev);
1229 of_dma_controller_free(np);
1230 dma_async_device_unregister(&fsl_qdma->dma_dev);
1231
1232 for (i = 0; i < fsl_qdma->block_number; i++) {
1233 status = fsl_qdma->status[i];
1234 dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) *
1235 status->n_cq, status->cq, status->bus_addr);
1236 }
1237 return 0;
1238}
1239
1240static const struct of_device_id fsl_qdma_dt_ids[] = {
1241 { .compatible = "fsl,ls1021a-qdma", },
1242 { /* sentinel */ }
1243};
1244MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids);
1245
1246static struct platform_driver fsl_qdma_driver = {
1247 .driver = {
1248 .name = "fsl-qdma",
1249 .of_match_table = fsl_qdma_dt_ids,
1250 },
1251 .probe = fsl_qdma_probe,
1252 .remove = fsl_qdma_remove,
1253};
1254
1255module_platform_driver(fsl_qdma_driver);
1256
1257MODULE_ALIAS("platform:fsl-qdma");
1258MODULE_LICENSE("GPL v2");
1259MODULE_DESCRIPTION("NXP Layerscape qDMA engine driver");
1260

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