1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright 2014-2015 Freescale
6 * Driver for NXP Layerscape Queue Direct Memory Access Controller
9 * Wen He <wen.he_1@nxp.com>
10 * Jiaheng Fan <jiaheng.fan@nxp.com>
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>
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
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))
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
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)
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)
69 #define FSL_QDMA_BCQIER_CQTIE BIT(15)
70 #define FSL_QDMA_BCQIER_CQPEIE BIT(23)
71 #define FSL_QDMA_BSQICR_ICEN BIT(31)
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)
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)
83 #define FSL_QDMA_BCQSR_QF BIT(16)
84 #define FSL_QDMA_BCQSR_XOFF BIT(0)
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)
90 #define FSL_QDMA_BSQSR_QE BIT(17)
92 #define FSL_QDMA_DMR_DQD BIT(30)
93 #define FSL_QDMA_DSR_DB BIT(31)
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
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
113 /* Field definition for Descriptor offset */
114 #define QDMA_CCDF_STATUS 20
115 #define QDMA_CCDF_OFFSET 20
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
123 #define FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma_engine, x) \
124 (((fsl_qdma_engine)->block_offset) * (x))
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.
141 struct fsl_qdma_format {
155 /* qDMA status notification pre information */
156 struct fsl_pre_status {
161 static DEFINE_PER_CPU(struct fsl_pre_status, pre);
163 struct 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;
171 struct 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;
182 struct fsl_qdma_format *cq;
183 void __iomem *block_base;
186 struct fsl_qdma_comp {
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;
196 struct fsl_qdma_engine {
197 struct dma_device dma_dev;
198 void __iomem *ctrl_base;
199 void __iomem *status_base;
200 void __iomem *block_base;
203 struct mutex fsl_qdma_mutex;
207 struct fsl_qdma_queue *queue;
208 struct fsl_qdma_queue **status;
209 struct fsl_qdma_chan *chans;
218 qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
220 return le64_to_cpu(ccdf->data) & (U64_MAX >> 24);
224 qdma_desc_addr_set64(struct fsl_qdma_format *ccdf, u64 addr)
226 ccdf->addr_hi = upper_32_bits(addr);
227 ccdf->addr_lo = cpu_to_le32(lower_32_bits(addr));
231 qdma_ccdf_get_queue(const struct fsl_qdma_format *ccdf)
233 return ccdf->cfg8b_w1 & U8_MAX;
237 qdma_ccdf_get_offset(const struct fsl_qdma_format *ccdf)
239 return (le32_to_cpu(ccdf->cfg) & QDMA_CCDF_MASK) >> QDMA_CCDF_OFFSET;
243 qdma_ccdf_set_format(struct fsl_qdma_format *ccdf, int offset)
245 ccdf->cfg = cpu_to_le32(QDMA_CCDF_FOTMAT | offset);
249 qdma_ccdf_get_status(const struct fsl_qdma_format *ccdf)
251 return (le32_to_cpu(ccdf->status) & QDMA_CCDF_MASK) >> QDMA_CCDF_STATUS;
255 qdma_ccdf_set_ser(struct fsl_qdma_format *ccdf, int status)
257 ccdf->status = cpu_to_le32(QDMA_CCDF_SER | status);
260 static inline void qdma_csgf_set_len(struct fsl_qdma_format *csgf, int len)
262 csgf->cfg = cpu_to_le32(len & QDMA_SG_LEN_MASK);
265 static inline void qdma_csgf_set_f(struct fsl_qdma_format *csgf, int len)
267 csgf->cfg = cpu_to_le32(QDMA_SG_FIN | (len & QDMA_SG_LEN_MASK));
270 static u32 qdma_readl(struct fsl_qdma_engine *qdma, void __iomem *addr)
272 return FSL_DMA_IN(qdma, addr, 32);
275 static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
278 FSL_DMA_OUT(qdma, addr, val, 32);
281 static struct fsl_qdma_chan *to_fsl_qdma_chan(struct dma_chan *chan)
283 return container_of(chan, struct fsl_qdma_chan, vchan.chan);
286 static struct fsl_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
288 return container_of(vd, struct fsl_qdma_comp, vdesc);
291 static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
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;
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);
304 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
306 if (!fsl_queue->comp_pool && !fsl_queue->comp_pool)
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);
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);
333 dma_pool_destroy(fsl_queue->comp_pool);
334 dma_pool_destroy(fsl_queue->desc_pool);
336 fsl_qdma->desc_allocated--;
337 fsl_queue->comp_pool = NULL;
338 fsl_queue->desc_pool = NULL;
341 static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
342 dma_addr_t dst, dma_addr_t src, u32 len)
344 struct fsl_qdma_format *sdf, *ddf;
345 struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
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;
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 */
373 cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
374 FSL_QDMA_CMD_RWTTYPE_OFFSET);
376 cpu_to_le64(FSL_QDMA_CMD_RWTTYPE <<
377 FSL_QDMA_CMD_RWTTYPE_OFFSET);
379 cpu_to_le64(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
383 * Pre-request full command descriptor for enqueue.
385 static int fsl_qdma_pre_request_enqueue_desc(struct fsl_qdma_queue *queue)
388 struct fsl_qdma_comp *comp_temp, *_comp_temp;
390 for (i = 0; i < queue->n_cq + FSL_COMMAND_QUEUE_OVERFLLOW; i++) {
391 comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
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)
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;
406 list_add_tail(&comp_temp->list, &queue->comp_free);
412 dma_pool_free(queue->comp_pool, comp_temp->virt_addr,
413 comp_temp->bus_addr);
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);
430 list_del(&comp_temp->list);
438 * Request a command descriptor for enqueue.
440 static struct fsl_qdma_comp
441 *fsl_qdma_request_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
444 struct fsl_qdma_comp *comp_temp;
445 int timeout = FSL_QDMA_COMP_TIMEOUT;
446 struct fsl_qdma_queue *queue = fsl_chan->queue;
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,
454 list_del(&comp_temp->list);
456 spin_unlock_irqrestore(&queue->queue_lock, flags);
457 comp_temp->qchan = fsl_chan;
460 spin_unlock_irqrestore(&queue->queue_lock, flags);
467 static struct fsl_qdma_queue
468 *fsl_qdma_alloc_queue_resources(struct platform_device *pdev,
469 struct fsl_qdma_engine *fsl_qdma)
472 int queue_num, block_number;
473 unsigned int queue_size[FSL_QDMA_QUEUE_MAX];
474 struct fsl_qdma_queue *queue_head, *queue_temp;
476 queue_num = fsl_qdma->n_queues;
477 block_number = fsl_qdma->block_number;
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);
486 ret = device_property_read_u32_array(&pdev->dev, "queue-sizes",
487 queue_size, queue_num);
489 dev_err(&pdev->dev, "Can't get queue-sizes.\n");
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) {
497 "Get wrong queue-sizes.\n");
500 queue_temp = queue_head + i + (j * queue_num);
503 dma_alloc_coherent(&pdev->dev,
504 sizeof(struct fsl_qdma_format) *
506 &queue_temp->bus_addr,
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];
514 queue_temp->virt_head = queue_temp->cq;
515 queue_temp->virt_tail = queue_temp->cq;
517 * List for queue command buffer
519 INIT_LIST_HEAD(&queue_temp->comp_used);
520 spin_lock_init(&queue_temp->queue_lock);
526 static struct fsl_qdma_queue
527 *fsl_qdma_prep_status_queue(struct platform_device *pdev)
530 unsigned int status_size;
531 struct fsl_qdma_queue *status_head;
532 struct device_node *np = pdev->dev.of_node;
534 ret = of_property_read_u32(np, "status-sizes", &status_size);
536 dev_err(&pdev->dev, "Can't get status-sizes.\n");
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");
544 status_head = devm_kzalloc(&pdev->dev,
545 sizeof(*status_head), GFP_KERNEL);
550 * Buffer for queue command
552 status_head->cq = dma_alloc_coherent(&pdev->dev,
553 sizeof(struct fsl_qdma_format) *
555 &status_head->bus_addr,
557 if (!status_head->cq) {
558 devm_kfree(&pdev->dev, status_head);
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;
569 static int fsl_qdma_halt(struct fsl_qdma_engine *fsl_qdma)
572 int i, j, count = FSL_QDMA_HALT_COUNT;
573 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
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));
586 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DSR);
587 if (!(reg & FSL_QDMA_DSR_DB))
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);
598 /* Disable status queue. */
599 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BSQMR);
602 * clear the command queue interrupt detect register for
605 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
606 block + FSL_QDMA_BCQIDR(0));
613 fsl_qdma_queue_transfer_complete(struct fsl_qdma_engine *fsl_qdma,
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];
625 count = FSL_QDMA_MAX_SIZE;
629 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
630 if (reg & FSL_QDMA_BSQSR_QE)
633 status_addr = fsl_status->virt_head;
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))
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;
646 spin_lock(&temp_queue->queue_lock);
647 if (list_empty(&temp_queue->comp_used)) {
649 spin_unlock(&temp_queue->queue_lock);
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)) {
658 spin_unlock(&temp_queue->queue_lock);
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
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);
676 list_del(&fsl_comp->list);
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);
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);
696 static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
699 struct fsl_qdma_engine *fsl_qdma = dev_id;
700 void __iomem *status = fsl_qdma->status_base;
702 intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
705 dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
707 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
711 static irqreturn_t fsl_qdma_queue_handler(int irq, void *dev_id)
714 unsigned int intr, reg;
715 struct fsl_qdma_engine *fsl_qdma = dev_id;
716 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
718 id = irq - fsl_qdma->irq_base;
719 if (id < 0 && id > fsl_qdma->block_number) {
720 dev_err(fsl_qdma->dma_dev.dev,
721 "irq %d is wrong irq_base is %d\n",
722 irq, fsl_qdma->irq_base);
725 block = fsl_qdma->block_base +
726 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, id);
728 intr = qdma_readl(fsl_qdma, block + FSL_QDMA_BCQIDR(0));
730 if ((intr & FSL_QDMA_CQIDR_SQT) != 0)
731 intr = fsl_qdma_queue_transfer_complete(fsl_qdma, block, id);
734 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
735 reg |= FSL_QDMA_DMR_DQD;
736 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
737 qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQIER(0));
738 dev_err(fsl_qdma->dma_dev.dev, "QDMA: status err!\n");
741 /* Clear all detected events and interrupts. */
742 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
743 block + FSL_QDMA_BCQIDR(0));
749 fsl_qdma_irq_init(struct platform_device *pdev,
750 struct fsl_qdma_engine *fsl_qdma)
757 fsl_qdma->error_irq =
758 platform_get_irq_byname(pdev, "qdma-error");
759 if (fsl_qdma->error_irq < 0) {
760 dev_err(&pdev->dev, "Can't get qdma controller irq.\n");
761 return fsl_qdma->error_irq;
764 ret = devm_request_irq(&pdev->dev, fsl_qdma->error_irq,
765 fsl_qdma_error_handler, 0,
766 "qDMA error", fsl_qdma);
768 dev_err(&pdev->dev, "Can't register qDMA controller IRQ.\n");
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);
777 if (fsl_qdma->queue_irq[i] < 0) {
779 "Can't get qdma queue %d irq.\n", i);
780 return fsl_qdma->queue_irq[i];
783 ret = devm_request_irq(&pdev->dev,
784 fsl_qdma->queue_irq[i],
785 fsl_qdma_queue_handler,
791 "Can't register qDMA queue IRQ.\n");
795 cpu = i % num_online_cpus();
796 ret = irq_set_affinity_hint(fsl_qdma->queue_irq[i],
800 "Can't set cpu %d affinity to IRQ %d.\n",
802 fsl_qdma->queue_irq[i]);
810 static void fsl_qdma_irq_exit(struct platform_device *pdev,
811 struct fsl_qdma_engine *fsl_qdma)
815 devm_free_irq(&pdev->dev, fsl_qdma->error_irq, fsl_qdma);
816 for (i = 0; i < fsl_qdma->block_number; i++)
817 devm_free_irq(&pdev->dev, fsl_qdma->queue_irq[i], fsl_qdma);
820 static int fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma)
824 struct fsl_qdma_queue *temp;
825 void __iomem *status = fsl_qdma->status_base;
826 void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
827 struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
829 /* Try to halt the qDMA engine first. */
830 ret = fsl_qdma_halt(fsl_qdma);
832 dev_err(fsl_qdma->dma_dev.dev, "DMA halt failed!");
836 for (i = 0; i < fsl_qdma->block_number; i++) {
838 * Clear the command queue interrupt detect register for
842 block = fsl_qdma->block_base +
843 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, i);
844 qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
845 block + FSL_QDMA_BCQIDR(0));
848 for (j = 0; j < fsl_qdma->block_number; j++) {
849 block = fsl_qdma->block_base +
850 FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
851 for (i = 0; i < fsl_qdma->n_queues; i++) {
852 temp = fsl_queue + i + (j * fsl_qdma->n_queues);
854 * Initialize Command Queue registers to
856 * command descriptor in memory.
857 * Dequeue Pointer Address Registers
858 * Enqueue Pointer Address Registers
861 qdma_writel(fsl_qdma, temp->bus_addr,
862 block + FSL_QDMA_BCQDPA_SADDR(i));
863 qdma_writel(fsl_qdma, temp->bus_addr,
864 block + FSL_QDMA_BCQEPA_SADDR(i));
866 /* Initialize the queue mode. */
867 reg = FSL_QDMA_BCQMR_EN;
868 reg |= FSL_QDMA_BCQMR_CD_THLD(ilog2(temp->n_cq) - 4);
869 reg |= FSL_QDMA_BCQMR_CQ_SIZE(ilog2(temp->n_cq) - 6);
870 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BCQMR(i));
874 * Workaround for erratum: ERR010812.
875 * We must enable XOFF to avoid the enqueue rejection occurs.
876 * Setting SQCCMR ENTER_WM to 0x20.
879 qdma_writel(fsl_qdma, FSL_QDMA_SQCCMR_ENTER_WM,
880 block + FSL_QDMA_SQCCMR);
883 * Initialize status queue registers to point to the first
884 * command descriptor in memory.
885 * Dequeue Pointer Address Registers
886 * Enqueue Pointer Address Registers
889 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
890 block + FSL_QDMA_SQEPAR);
891 qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
892 block + FSL_QDMA_SQDPAR);
893 /* Initialize status queue interrupt. */
894 qdma_writel(fsl_qdma, FSL_QDMA_BCQIER_CQTIE,
895 block + FSL_QDMA_BCQIER(0));
896 qdma_writel(fsl_qdma, FSL_QDMA_BSQICR_ICEN |
897 FSL_QDMA_BSQICR_ICST(5) | 0x8000,
898 block + FSL_QDMA_BSQICR);
899 qdma_writel(fsl_qdma, FSL_QDMA_CQIER_MEIE |
901 block + FSL_QDMA_CQIER);
903 /* Initialize the status queue mode. */
904 reg = FSL_QDMA_BSQMR_EN;
905 reg |= FSL_QDMA_BSQMR_CQ_SIZE(ilog2
906 (fsl_qdma->status[j]->n_cq) - 6);
908 qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
909 reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
912 /* Initialize controller interrupt register. */
913 qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
914 qdma_writel(fsl_qdma, FSL_QDMA_DEIER_CLEAR, status + FSL_QDMA_DEIER);
916 reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
917 reg &= ~FSL_QDMA_DMR_DQD;
918 qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
923 static struct dma_async_tx_descriptor *
924 fsl_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
925 dma_addr_t src, size_t len, unsigned long flags)
927 struct fsl_qdma_comp *fsl_comp;
928 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
930 fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan);
935 fsl_qdma_comp_fill_memcpy(fsl_comp, dst, src, len);
937 return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
940 static void fsl_qdma_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
943 struct virt_dma_desc *vdesc;
944 struct fsl_qdma_comp *fsl_comp;
945 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
946 void __iomem *block = fsl_queue->block_base;
948 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQSR(fsl_queue->id));
949 if (reg & (FSL_QDMA_BCQSR_QF | FSL_QDMA_BCQSR_XOFF))
951 vdesc = vchan_next_desc(&fsl_chan->vchan);
954 list_del(&vdesc->node);
955 fsl_comp = to_fsl_qdma_comp(vdesc);
957 memcpy(fsl_queue->virt_head++,
958 fsl_comp->virt_addr, sizeof(struct fsl_qdma_format));
959 if (fsl_queue->virt_head == fsl_queue->cq + fsl_queue->n_cq)
960 fsl_queue->virt_head = fsl_queue->cq;
962 list_add_tail(&fsl_comp->list, &fsl_queue->comp_used);
964 reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQMR(fsl_queue->id));
965 reg |= FSL_QDMA_BCQMR_EI;
966 qdma_writel(fsl_chan->qdma, reg, block + FSL_QDMA_BCQMR(fsl_queue->id));
967 fsl_chan->status = DMA_IN_PROGRESS;
970 static void fsl_qdma_free_desc(struct virt_dma_desc *vdesc)
973 struct fsl_qdma_comp *fsl_comp;
974 struct fsl_qdma_queue *fsl_queue;
976 fsl_comp = to_fsl_qdma_comp(vdesc);
977 fsl_queue = fsl_comp->qchan->queue;
979 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
980 list_add_tail(&fsl_comp->list, &fsl_queue->comp_free);
981 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
984 static void fsl_qdma_issue_pending(struct dma_chan *chan)
987 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
988 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
990 spin_lock_irqsave(&fsl_queue->queue_lock, flags);
991 spin_lock(&fsl_chan->vchan.lock);
992 if (vchan_issue_pending(&fsl_chan->vchan))
993 fsl_qdma_enqueue_desc(fsl_chan);
994 spin_unlock(&fsl_chan->vchan.lock);
995 spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
998 static void fsl_qdma_synchronize(struct dma_chan *chan)
1000 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1002 vchan_synchronize(&fsl_chan->vchan);
1005 static int fsl_qdma_terminate_all(struct dma_chan *chan)
1008 unsigned long flags;
1009 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1011 spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
1012 vchan_get_all_descriptors(&fsl_chan->vchan, &head);
1013 spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
1014 vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
1018 static int fsl_qdma_alloc_chan_resources(struct dma_chan *chan)
1021 struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
1022 struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
1023 struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
1025 if (fsl_queue->comp_pool && fsl_queue->desc_pool)
1026 return fsl_qdma->desc_allocated;
1028 INIT_LIST_HEAD(&fsl_queue->comp_free);
1031 * The dma pool for queue command buffer
1033 fsl_queue->comp_pool =
1034 dma_pool_create("comp_pool",
1036 FSL_QDMA_COMMAND_BUFFER_SIZE,
1038 if (!fsl_queue->comp_pool)
1042 * The dma pool for Descriptor(SD/DD) buffer
1044 fsl_queue->desc_pool =
1045 dma_pool_create("desc_pool",
1047 FSL_QDMA_DESCRIPTOR_BUFFER_SIZE,
1049 if (!fsl_queue->desc_pool)
1052 ret = fsl_qdma_pre_request_enqueue_desc(fsl_queue);
1054 dev_err(chan->device->dev,
1055 "failed to alloc dma buffer for S/G descriptor\n");
1059 fsl_qdma->desc_allocated++;
1060 return fsl_qdma->desc_allocated;
1063 dma_pool_destroy(fsl_queue->desc_pool);
1065 dma_pool_destroy(fsl_queue->comp_pool);
1069 static int fsl_qdma_probe(struct platform_device *pdev)
1072 int blk_num, blk_off;
1073 u32 len, chans, queues;
1074 struct resource *res;
1075 struct fsl_qdma_chan *fsl_chan;
1076 struct fsl_qdma_engine *fsl_qdma;
1077 struct device_node *np = pdev->dev.of_node;
1079 ret = of_property_read_u32(np, "dma-channels", &chans);
1081 dev_err(&pdev->dev, "Can't get dma-channels.\n");
1085 ret = of_property_read_u32(np, "block-offset", &blk_off);
1087 dev_err(&pdev->dev, "Can't get block-offset.\n");
1091 ret = of_property_read_u32(np, "block-number", &blk_num);
1093 dev_err(&pdev->dev, "Can't get block-number.\n");
1097 blk_num = min_t(int, blk_num, num_online_cpus());
1099 len = sizeof(*fsl_qdma);
1100 fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1104 len = sizeof(*fsl_chan) * chans;
1105 fsl_qdma->chans = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1106 if (!fsl_qdma->chans)
1109 len = sizeof(struct fsl_qdma_queue *) * blk_num;
1110 fsl_qdma->status = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1111 if (!fsl_qdma->status)
1114 len = sizeof(int) * blk_num;
1115 fsl_qdma->queue_irq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
1116 if (!fsl_qdma->queue_irq)
1119 ret = of_property_read_u32(np, "fsl,dma-queues", &queues);
1121 dev_err(&pdev->dev, "Can't get queues.\n");
1125 fsl_qdma->desc_allocated = 0;
1126 fsl_qdma->n_chans = chans;
1127 fsl_qdma->n_queues = queues;
1128 fsl_qdma->block_number = blk_num;
1129 fsl_qdma->block_offset = blk_off;
1131 mutex_init(&fsl_qdma->fsl_qdma_mutex);
1133 for (i = 0; i < fsl_qdma->block_number; i++) {
1134 fsl_qdma->status[i] = fsl_qdma_prep_status_queue(pdev);
1135 if (!fsl_qdma->status[i])
1138 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1139 fsl_qdma->ctrl_base = devm_ioremap_resource(&pdev->dev, res);
1140 if (IS_ERR(fsl_qdma->ctrl_base))
1141 return PTR_ERR(fsl_qdma->ctrl_base);
1143 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1144 fsl_qdma->status_base = devm_ioremap_resource(&pdev->dev, res);
1145 if (IS_ERR(fsl_qdma->status_base))
1146 return PTR_ERR(fsl_qdma->status_base);
1148 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1149 fsl_qdma->block_base = devm_ioremap_resource(&pdev->dev, res);
1150 if (IS_ERR(fsl_qdma->block_base))
1151 return PTR_ERR(fsl_qdma->block_base);
1152 fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, fsl_qdma);
1153 if (!fsl_qdma->queue)
1156 ret = fsl_qdma_irq_init(pdev, fsl_qdma);
1160 fsl_qdma->irq_base = platform_get_irq_byname(pdev, "qdma-queue0");
1161 fsl_qdma->feature = of_property_read_bool(np, "big-endian");
1162 INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels);
1164 for (i = 0; i < fsl_qdma->n_chans; i++) {
1165 struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i];
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);
1174 dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask);
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;
1187 dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
1189 platform_set_drvdata(pdev, fsl_qdma);
1191 ret = dma_async_device_register(&fsl_qdma->dma_dev);
1194 "Can't register NXP Layerscape qDMA engine.\n");
1198 ret = fsl_qdma_reg_init(fsl_qdma);
1200 dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n");
1207 static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
1209 struct fsl_qdma_chan *chan, *_chan;
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);
1218 static int fsl_qdma_remove(struct platform_device *pdev)
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);
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);
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);
1238 static const struct of_device_id fsl_qdma_dt_ids[] = {
1239 { .compatible = "fsl,ls1021a-qdma", },
1242 MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids);
1244 static struct platform_driver fsl_qdma_driver = {
1247 .of_match_table = fsl_qdma_dt_ids,
1249 .probe = fsl_qdma_probe,
1250 .remove = fsl_qdma_remove,
1253 module_platform_driver(fsl_qdma_driver);
1255 MODULE_ALIAS("platform:fsl-qdma");
1256 MODULE_LICENSE("GPL v2");
1257 MODULE_DESCRIPTION("NXP Layerscape qDMA engine driver");