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b092529e PM |
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 | |
8f95adcf | 116 | #define QDMA_SDDF_CMD(x) (((u64)(x)) << 32) |
b092529e PM |
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->comp_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 | { | |
8f95adcf | 345 | u32 cmd; |
b092529e PM |
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 */ | |
8f95adcf PM |
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); | |
b092529e PM |
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 | ||
c983d805 | 706 | if (intr) |
b092529e | 707 | dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n"); |
b092529e PM |
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"); | |
e17be6e1 | 761 | if (fsl_qdma->error_irq < 0) |
b092529e | 762 | return fsl_qdma->error_irq; |
b092529e PM |
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 | ||
e17be6e1 | 777 | if (fsl_qdma->queue_irq[i] < 0) |
b092529e | 778 | return fsl_qdma->queue_irq[i]; |
b092529e PM |
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 | fsl_qdma->feature = of_property_read_bool(np, "big-endian"); | |
1159 | INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels); | |
1160 | ||
1161 | for (i = 0; i < fsl_qdma->n_chans; i++) { | |
1162 | struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i]; | |
1163 | ||
1164 | fsl_chan->qdma = fsl_qdma; | |
1165 | fsl_chan->queue = fsl_qdma->queue + i % (fsl_qdma->n_queues * | |
1166 | fsl_qdma->block_number); | |
1167 | fsl_chan->vchan.desc_free = fsl_qdma_free_desc; | |
1168 | vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev); | |
1169 | } | |
1170 | ||
1171 | dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask); | |
1172 | ||
1173 | fsl_qdma->dma_dev.dev = &pdev->dev; | |
1174 | fsl_qdma->dma_dev.device_free_chan_resources = | |
1175 | fsl_qdma_free_chan_resources; | |
1176 | fsl_qdma->dma_dev.device_alloc_chan_resources = | |
1177 | fsl_qdma_alloc_chan_resources; | |
1178 | fsl_qdma->dma_dev.device_tx_status = dma_cookie_status; | |
1179 | fsl_qdma->dma_dev.device_prep_dma_memcpy = fsl_qdma_prep_memcpy; | |
1180 | fsl_qdma->dma_dev.device_issue_pending = fsl_qdma_issue_pending; | |
1181 | fsl_qdma->dma_dev.device_synchronize = fsl_qdma_synchronize; | |
1182 | fsl_qdma->dma_dev.device_terminate_all = fsl_qdma_terminate_all; | |
1183 | ||
1184 | dma_set_mask(&pdev->dev, DMA_BIT_MASK(40)); | |
1185 | ||
1186 | platform_set_drvdata(pdev, fsl_qdma); | |
1187 | ||
1188 | ret = dma_async_device_register(&fsl_qdma->dma_dev); | |
1189 | if (ret) { | |
1190 | dev_err(&pdev->dev, | |
1191 | "Can't register NXP Layerscape qDMA engine.\n"); | |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | ret = fsl_qdma_reg_init(fsl_qdma); | |
1196 | if (ret) { | |
1197 | dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n"); | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev) | |
1205 | { | |
1206 | struct fsl_qdma_chan *chan, *_chan; | |
1207 | ||
1208 | list_for_each_entry_safe(chan, _chan, | |
1209 | &dmadev->channels, vchan.chan.device_node) { | |
1210 | list_del(&chan->vchan.chan.device_node); | |
1211 | tasklet_kill(&chan->vchan.task); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | static int fsl_qdma_remove(struct platform_device *pdev) | |
1216 | { | |
1217 | int i; | |
1218 | struct fsl_qdma_queue *status; | |
1219 | struct device_node *np = pdev->dev.of_node; | |
1220 | struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev); | |
1221 | ||
1222 | fsl_qdma_irq_exit(pdev, fsl_qdma); | |
1223 | fsl_qdma_cleanup_vchan(&fsl_qdma->dma_dev); | |
1224 | of_dma_controller_free(np); | |
1225 | dma_async_device_unregister(&fsl_qdma->dma_dev); | |
1226 | ||
1227 | for (i = 0; i < fsl_qdma->block_number; i++) { | |
1228 | status = fsl_qdma->status[i]; | |
1229 | dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) * | |
1230 | status->n_cq, status->cq, status->bus_addr); | |
1231 | } | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | static const struct of_device_id fsl_qdma_dt_ids[] = { | |
1236 | { .compatible = "fsl,ls1021a-qdma", }, | |
1237 | { /* sentinel */ } | |
1238 | }; | |
1239 | MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids); | |
1240 | ||
1241 | static struct platform_driver fsl_qdma_driver = { | |
1242 | .driver = { | |
1243 | .name = "fsl-qdma", | |
1244 | .of_match_table = fsl_qdma_dt_ids, | |
1245 | }, | |
1246 | .probe = fsl_qdma_probe, | |
1247 | .remove = fsl_qdma_remove, | |
1248 | }; | |
1249 | ||
1250 | module_platform_driver(fsl_qdma_driver); | |
1251 | ||
1252 | MODULE_ALIAS("platform:fsl-qdma"); | |
279cc97c | 1253 | MODULE_LICENSE("GPL v2"); |
b092529e | 1254 | MODULE_DESCRIPTION("NXP Layerscape qDMA engine driver"); |