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b7d861d9 BK |
1 | /* |
2 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
3 | * http://www.samsung.com | |
b3040e40 JB |
4 | * |
5 | * Copyright (C) 2010 Samsung Electronics Co. Ltd. | |
6 | * Jaswinder Singh <jassi.brar@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
b7d861d9 | 14 | #include <linux/kernel.h> |
b3040e40 JB |
15 | #include <linux/io.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/module.h> | |
b7d861d9 BK |
19 | #include <linux/string.h> |
20 | #include <linux/delay.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/dma-mapping.h> | |
b3040e40 | 23 | #include <linux/dmaengine.h> |
b3040e40 JB |
24 | #include <linux/amba/bus.h> |
25 | #include <linux/amba/pl330.h> | |
1b9bb715 | 26 | #include <linux/scatterlist.h> |
93ed5544 | 27 | #include <linux/of.h> |
a80258f9 | 28 | #include <linux/of_dma.h> |
bcc7fa95 | 29 | #include <linux/err.h> |
b3040e40 | 30 | |
d2ebfb33 | 31 | #include "dmaengine.h" |
b7d861d9 BK |
32 | #define PL330_MAX_CHAN 8 |
33 | #define PL330_MAX_IRQS 32 | |
34 | #define PL330_MAX_PERI 32 | |
35 | ||
f0564c7e LPC |
36 | enum pl330_cachectrl { |
37 | CCTRL0, /* Noncacheable and nonbufferable */ | |
38 | CCTRL1, /* Bufferable only */ | |
39 | CCTRL2, /* Cacheable, but do not allocate */ | |
40 | CCTRL3, /* Cacheable and bufferable, but do not allocate */ | |
41 | INVALID1, /* AWCACHE = 0x1000 */ | |
42 | INVALID2, | |
43 | CCTRL6, /* Cacheable write-through, allocate on writes only */ | |
44 | CCTRL7, /* Cacheable write-back, allocate on writes only */ | |
b7d861d9 BK |
45 | }; |
46 | ||
47 | enum pl330_byteswap { | |
48 | SWAP_NO, | |
49 | SWAP_2, | |
50 | SWAP_4, | |
51 | SWAP_8, | |
52 | SWAP_16, | |
53 | }; | |
54 | ||
b7d861d9 BK |
55 | /* Register and Bit field Definitions */ |
56 | #define DS 0x0 | |
57 | #define DS_ST_STOP 0x0 | |
58 | #define DS_ST_EXEC 0x1 | |
59 | #define DS_ST_CMISS 0x2 | |
60 | #define DS_ST_UPDTPC 0x3 | |
61 | #define DS_ST_WFE 0x4 | |
62 | #define DS_ST_ATBRR 0x5 | |
63 | #define DS_ST_QBUSY 0x6 | |
64 | #define DS_ST_WFP 0x7 | |
65 | #define DS_ST_KILL 0x8 | |
66 | #define DS_ST_CMPLT 0x9 | |
67 | #define DS_ST_FLTCMP 0xe | |
68 | #define DS_ST_FAULT 0xf | |
69 | ||
70 | #define DPC 0x4 | |
71 | #define INTEN 0x20 | |
72 | #define ES 0x24 | |
73 | #define INTSTATUS 0x28 | |
74 | #define INTCLR 0x2c | |
75 | #define FSM 0x30 | |
76 | #define FSC 0x34 | |
77 | #define FTM 0x38 | |
78 | ||
79 | #define _FTC 0x40 | |
80 | #define FTC(n) (_FTC + (n)*0x4) | |
81 | ||
82 | #define _CS 0x100 | |
83 | #define CS(n) (_CS + (n)*0x8) | |
84 | #define CS_CNS (1 << 21) | |
85 | ||
86 | #define _CPC 0x104 | |
87 | #define CPC(n) (_CPC + (n)*0x8) | |
88 | ||
89 | #define _SA 0x400 | |
90 | #define SA(n) (_SA + (n)*0x20) | |
91 | ||
92 | #define _DA 0x404 | |
93 | #define DA(n) (_DA + (n)*0x20) | |
94 | ||
95 | #define _CC 0x408 | |
96 | #define CC(n) (_CC + (n)*0x20) | |
97 | ||
98 | #define CC_SRCINC (1 << 0) | |
99 | #define CC_DSTINC (1 << 14) | |
100 | #define CC_SRCPRI (1 << 8) | |
101 | #define CC_DSTPRI (1 << 22) | |
102 | #define CC_SRCNS (1 << 9) | |
103 | #define CC_DSTNS (1 << 23) | |
104 | #define CC_SRCIA (1 << 10) | |
105 | #define CC_DSTIA (1 << 24) | |
106 | #define CC_SRCBRSTLEN_SHFT 4 | |
107 | #define CC_DSTBRSTLEN_SHFT 18 | |
108 | #define CC_SRCBRSTSIZE_SHFT 1 | |
109 | #define CC_DSTBRSTSIZE_SHFT 15 | |
110 | #define CC_SRCCCTRL_SHFT 11 | |
111 | #define CC_SRCCCTRL_MASK 0x7 | |
112 | #define CC_DSTCCTRL_SHFT 25 | |
113 | #define CC_DRCCCTRL_MASK 0x7 | |
114 | #define CC_SWAP_SHFT 28 | |
115 | ||
116 | #define _LC0 0x40c | |
117 | #define LC0(n) (_LC0 + (n)*0x20) | |
118 | ||
119 | #define _LC1 0x410 | |
120 | #define LC1(n) (_LC1 + (n)*0x20) | |
121 | ||
122 | #define DBGSTATUS 0xd00 | |
123 | #define DBG_BUSY (1 << 0) | |
124 | ||
125 | #define DBGCMD 0xd04 | |
126 | #define DBGINST0 0xd08 | |
127 | #define DBGINST1 0xd0c | |
128 | ||
129 | #define CR0 0xe00 | |
130 | #define CR1 0xe04 | |
131 | #define CR2 0xe08 | |
132 | #define CR3 0xe0c | |
133 | #define CR4 0xe10 | |
134 | #define CRD 0xe14 | |
135 | ||
136 | #define PERIPH_ID 0xfe0 | |
3ecf51a4 BK |
137 | #define PERIPH_REV_SHIFT 20 |
138 | #define PERIPH_REV_MASK 0xf | |
139 | #define PERIPH_REV_R0P0 0 | |
140 | #define PERIPH_REV_R1P0 1 | |
141 | #define PERIPH_REV_R1P1 2 | |
b7d861d9 BK |
142 | |
143 | #define CR0_PERIPH_REQ_SET (1 << 0) | |
144 | #define CR0_BOOT_EN_SET (1 << 1) | |
145 | #define CR0_BOOT_MAN_NS (1 << 2) | |
146 | #define CR0_NUM_CHANS_SHIFT 4 | |
147 | #define CR0_NUM_CHANS_MASK 0x7 | |
148 | #define CR0_NUM_PERIPH_SHIFT 12 | |
149 | #define CR0_NUM_PERIPH_MASK 0x1f | |
150 | #define CR0_NUM_EVENTS_SHIFT 17 | |
151 | #define CR0_NUM_EVENTS_MASK 0x1f | |
152 | ||
153 | #define CR1_ICACHE_LEN_SHIFT 0 | |
154 | #define CR1_ICACHE_LEN_MASK 0x7 | |
155 | #define CR1_NUM_ICACHELINES_SHIFT 4 | |
156 | #define CR1_NUM_ICACHELINES_MASK 0xf | |
157 | ||
158 | #define CRD_DATA_WIDTH_SHIFT 0 | |
159 | #define CRD_DATA_WIDTH_MASK 0x7 | |
160 | #define CRD_WR_CAP_SHIFT 4 | |
161 | #define CRD_WR_CAP_MASK 0x7 | |
162 | #define CRD_WR_Q_DEP_SHIFT 8 | |
163 | #define CRD_WR_Q_DEP_MASK 0xf | |
164 | #define CRD_RD_CAP_SHIFT 12 | |
165 | #define CRD_RD_CAP_MASK 0x7 | |
166 | #define CRD_RD_Q_DEP_SHIFT 16 | |
167 | #define CRD_RD_Q_DEP_MASK 0xf | |
168 | #define CRD_DATA_BUFF_SHIFT 20 | |
169 | #define CRD_DATA_BUFF_MASK 0x3ff | |
170 | ||
171 | #define PART 0x330 | |
172 | #define DESIGNER 0x41 | |
173 | #define REVISION 0x0 | |
174 | #define INTEG_CFG 0x0 | |
175 | #define PERIPH_ID_VAL ((PART << 0) | (DESIGNER << 12)) | |
176 | ||
b7d861d9 BK |
177 | #define PL330_STATE_STOPPED (1 << 0) |
178 | #define PL330_STATE_EXECUTING (1 << 1) | |
179 | #define PL330_STATE_WFE (1 << 2) | |
180 | #define PL330_STATE_FAULTING (1 << 3) | |
181 | #define PL330_STATE_COMPLETING (1 << 4) | |
182 | #define PL330_STATE_WFP (1 << 5) | |
183 | #define PL330_STATE_KILLING (1 << 6) | |
184 | #define PL330_STATE_FAULT_COMPLETING (1 << 7) | |
185 | #define PL330_STATE_CACHEMISS (1 << 8) | |
186 | #define PL330_STATE_UPDTPC (1 << 9) | |
187 | #define PL330_STATE_ATBARRIER (1 << 10) | |
188 | #define PL330_STATE_QUEUEBUSY (1 << 11) | |
189 | #define PL330_STATE_INVALID (1 << 15) | |
190 | ||
191 | #define PL330_STABLE_STATES (PL330_STATE_STOPPED | PL330_STATE_EXECUTING \ | |
192 | | PL330_STATE_WFE | PL330_STATE_FAULTING) | |
193 | ||
194 | #define CMD_DMAADDH 0x54 | |
195 | #define CMD_DMAEND 0x00 | |
196 | #define CMD_DMAFLUSHP 0x35 | |
197 | #define CMD_DMAGO 0xa0 | |
198 | #define CMD_DMALD 0x04 | |
199 | #define CMD_DMALDP 0x25 | |
200 | #define CMD_DMALP 0x20 | |
201 | #define CMD_DMALPEND 0x28 | |
202 | #define CMD_DMAKILL 0x01 | |
203 | #define CMD_DMAMOV 0xbc | |
204 | #define CMD_DMANOP 0x18 | |
205 | #define CMD_DMARMB 0x12 | |
206 | #define CMD_DMASEV 0x34 | |
207 | #define CMD_DMAST 0x08 | |
208 | #define CMD_DMASTP 0x29 | |
209 | #define CMD_DMASTZ 0x0c | |
210 | #define CMD_DMAWFE 0x36 | |
211 | #define CMD_DMAWFP 0x30 | |
212 | #define CMD_DMAWMB 0x13 | |
213 | ||
214 | #define SZ_DMAADDH 3 | |
215 | #define SZ_DMAEND 1 | |
216 | #define SZ_DMAFLUSHP 2 | |
217 | #define SZ_DMALD 1 | |
218 | #define SZ_DMALDP 2 | |
219 | #define SZ_DMALP 2 | |
220 | #define SZ_DMALPEND 2 | |
221 | #define SZ_DMAKILL 1 | |
222 | #define SZ_DMAMOV 6 | |
223 | #define SZ_DMANOP 1 | |
224 | #define SZ_DMARMB 1 | |
225 | #define SZ_DMASEV 2 | |
226 | #define SZ_DMAST 1 | |
227 | #define SZ_DMASTP 2 | |
228 | #define SZ_DMASTZ 1 | |
229 | #define SZ_DMAWFE 2 | |
230 | #define SZ_DMAWFP 2 | |
231 | #define SZ_DMAWMB 1 | |
232 | #define SZ_DMAGO 6 | |
233 | ||
234 | #define BRST_LEN(ccr) ((((ccr) >> CC_SRCBRSTLEN_SHFT) & 0xf) + 1) | |
235 | #define BRST_SIZE(ccr) (1 << (((ccr) >> CC_SRCBRSTSIZE_SHFT) & 0x7)) | |
236 | ||
237 | #define BYTE_TO_BURST(b, ccr) ((b) / BRST_SIZE(ccr) / BRST_LEN(ccr)) | |
238 | #define BURST_TO_BYTE(c, ccr) ((c) * BRST_SIZE(ccr) * BRST_LEN(ccr)) | |
239 | ||
240 | /* | |
241 | * With 256 bytes, we can do more than 2.5MB and 5MB xfers per req | |
242 | * at 1byte/burst for P<->M and M<->M respectively. | |
243 | * For typical scenario, at 1word/burst, 10MB and 20MB xfers per req | |
244 | * should be enough for P<->M and M<->M respectively. | |
245 | */ | |
246 | #define MCODE_BUFF_PER_REQ 256 | |
247 | ||
b7d861d9 BK |
248 | /* Use this _only_ to wait on transient states */ |
249 | #define UNTIL(t, s) while (!(_state(t) & (s))) cpu_relax(); | |
250 | ||
251 | #ifdef PL330_DEBUG_MCGEN | |
252 | static unsigned cmd_line; | |
253 | #define PL330_DBGCMD_DUMP(off, x...) do { \ | |
254 | printk("%x:", cmd_line); \ | |
255 | printk(x); \ | |
256 | cmd_line += off; \ | |
257 | } while (0) | |
258 | #define PL330_DBGMC_START(addr) (cmd_line = addr) | |
259 | #else | |
260 | #define PL330_DBGCMD_DUMP(off, x...) do {} while (0) | |
261 | #define PL330_DBGMC_START(addr) do {} while (0) | |
262 | #endif | |
263 | ||
264 | /* The number of default descriptors */ | |
d2ebfb33 | 265 | |
b3040e40 JB |
266 | #define NR_DEFAULT_DESC 16 |
267 | ||
b7d861d9 BK |
268 | /* Populated by the PL330 core driver for DMA API driver's info */ |
269 | struct pl330_config { | |
270 | u32 periph_id; | |
b7d861d9 BK |
271 | #define DMAC_MODE_NS (1 << 0) |
272 | unsigned int mode; | |
273 | unsigned int data_bus_width:10; /* In number of bits */ | |
274 | unsigned int data_buf_dep:10; | |
275 | unsigned int num_chan:4; | |
276 | unsigned int num_peri:6; | |
277 | u32 peri_ns; | |
278 | unsigned int num_events:6; | |
279 | u32 irq_ns; | |
280 | }; | |
281 | ||
b7d861d9 BK |
282 | /** |
283 | * Request Configuration. | |
284 | * The PL330 core does not modify this and uses the last | |
285 | * working configuration if the request doesn't provide any. | |
286 | * | |
287 | * The Client may want to provide this info only for the | |
288 | * first request and a request with new settings. | |
289 | */ | |
290 | struct pl330_reqcfg { | |
291 | /* Address Incrementing */ | |
292 | unsigned dst_inc:1; | |
293 | unsigned src_inc:1; | |
294 | ||
295 | /* | |
296 | * For now, the SRC & DST protection levels | |
297 | * and burst size/length are assumed same. | |
298 | */ | |
299 | bool nonsecure; | |
300 | bool privileged; | |
301 | bool insnaccess; | |
302 | unsigned brst_len:5; | |
303 | unsigned brst_size:3; /* in power of 2 */ | |
304 | ||
f0564c7e LPC |
305 | enum pl330_cachectrl dcctl; |
306 | enum pl330_cachectrl scctl; | |
b7d861d9 | 307 | enum pl330_byteswap swap; |
3ecf51a4 | 308 | struct pl330_config *pcfg; |
b7d861d9 BK |
309 | }; |
310 | ||
311 | /* | |
312 | * One cycle of DMAC operation. | |
313 | * There may be more than one xfer in a request. | |
314 | */ | |
315 | struct pl330_xfer { | |
316 | u32 src_addr; | |
317 | u32 dst_addr; | |
318 | /* Size to xfer */ | |
319 | u32 bytes; | |
b7d861d9 BK |
320 | }; |
321 | ||
322 | /* The xfer callbacks are made with one of these arguments. */ | |
323 | enum pl330_op_err { | |
324 | /* The all xfers in the request were success. */ | |
325 | PL330_ERR_NONE, | |
326 | /* If req aborted due to global error. */ | |
327 | PL330_ERR_ABORT, | |
328 | /* If req failed due to problem with Channel. */ | |
329 | PL330_ERR_FAIL, | |
330 | }; | |
331 | ||
b7d861d9 BK |
332 | enum dmamov_dst { |
333 | SAR = 0, | |
334 | CCR, | |
335 | DAR, | |
336 | }; | |
337 | ||
338 | enum pl330_dst { | |
339 | SRC = 0, | |
340 | DST, | |
341 | }; | |
342 | ||
343 | enum pl330_cond { | |
344 | SINGLE, | |
345 | BURST, | |
346 | ALWAYS, | |
347 | }; | |
348 | ||
9dc5a315 LPC |
349 | struct dma_pl330_desc; |
350 | ||
b7d861d9 BK |
351 | struct _pl330_req { |
352 | u32 mc_bus; | |
353 | void *mc_cpu; | |
9dc5a315 | 354 | struct dma_pl330_desc *desc; |
b7d861d9 BK |
355 | }; |
356 | ||
357 | /* ToBeDone for tasklet */ | |
358 | struct _pl330_tbd { | |
359 | bool reset_dmac; | |
360 | bool reset_mngr; | |
361 | u8 reset_chan; | |
362 | }; | |
363 | ||
364 | /* A DMAC Thread */ | |
365 | struct pl330_thread { | |
366 | u8 id; | |
367 | int ev; | |
368 | /* If the channel is not yet acquired by any client */ | |
369 | bool free; | |
370 | /* Parent DMAC */ | |
371 | struct pl330_dmac *dmac; | |
372 | /* Only two at a time */ | |
373 | struct _pl330_req req[2]; | |
374 | /* Index of the last enqueued request */ | |
375 | unsigned lstenq; | |
376 | /* Index of the last submitted request or -1 if the DMA is stopped */ | |
377 | int req_running; | |
378 | }; | |
379 | ||
380 | enum pl330_dmac_state { | |
381 | UNINIT, | |
382 | INIT, | |
383 | DYING, | |
384 | }; | |
385 | ||
b3040e40 JB |
386 | enum desc_status { |
387 | /* In the DMAC pool */ | |
388 | FREE, | |
389 | /* | |
d73111c6 | 390 | * Allocated to some channel during prep_xxx |
b3040e40 JB |
391 | * Also may be sitting on the work_list. |
392 | */ | |
393 | PREP, | |
394 | /* | |
395 | * Sitting on the work_list and already submitted | |
396 | * to the PL330 core. Not more than two descriptors | |
397 | * of a channel can be BUSY at any time. | |
398 | */ | |
399 | BUSY, | |
400 | /* | |
401 | * Sitting on the channel work_list but xfer done | |
402 | * by PL330 core | |
403 | */ | |
404 | DONE, | |
405 | }; | |
406 | ||
407 | struct dma_pl330_chan { | |
408 | /* Schedule desc completion */ | |
409 | struct tasklet_struct task; | |
410 | ||
411 | /* DMA-Engine Channel */ | |
412 | struct dma_chan chan; | |
413 | ||
04abf5da LPC |
414 | /* List of submitted descriptors */ |
415 | struct list_head submitted_list; | |
416 | /* List of issued descriptors */ | |
b3040e40 | 417 | struct list_head work_list; |
39ff8613 LPC |
418 | /* List of completed descriptors */ |
419 | struct list_head completed_list; | |
b3040e40 JB |
420 | |
421 | /* Pointer to the DMAC that manages this channel, | |
422 | * NULL if the channel is available to be acquired. | |
423 | * As the parent, this DMAC also provides descriptors | |
424 | * to the channel. | |
425 | */ | |
f6f2421c | 426 | struct pl330_dmac *dmac; |
b3040e40 JB |
427 | |
428 | /* To protect channel manipulation */ | |
429 | spinlock_t lock; | |
430 | ||
65ad6060 LPC |
431 | /* |
432 | * Hardware channel thread of PL330 DMAC. NULL if the channel is | |
433 | * available. | |
b3040e40 | 434 | */ |
65ad6060 | 435 | struct pl330_thread *thread; |
1b9bb715 BK |
436 | |
437 | /* For D-to-M and M-to-D channels */ | |
438 | int burst_sz; /* the peripheral fifo width */ | |
1d0c1d60 | 439 | int burst_len; /* the number of burst */ |
1b9bb715 | 440 | dma_addr_t fifo_addr; |
42bc9cf4 BK |
441 | |
442 | /* for cyclic capability */ | |
443 | bool cyclic; | |
b3040e40 JB |
444 | }; |
445 | ||
f6f2421c | 446 | struct pl330_dmac { |
b3040e40 JB |
447 | /* DMA-Engine Device */ |
448 | struct dma_device ddma; | |
449 | ||
b714b84e LPC |
450 | /* Holds info about sg limitations */ |
451 | struct device_dma_parameters dma_parms; | |
452 | ||
b3040e40 JB |
453 | /* Pool of descriptors available for the DMAC's channels */ |
454 | struct list_head desc_pool; | |
455 | /* To protect desc_pool manipulation */ | |
456 | spinlock_t pool_lock; | |
457 | ||
f6f2421c LPC |
458 | /* Size of MicroCode buffers for each channel. */ |
459 | unsigned mcbufsz; | |
460 | /* ioremap'ed address of PL330 registers. */ | |
461 | void __iomem *base; | |
462 | /* Populated by the PL330 core driver during pl330_add */ | |
463 | struct pl330_config pcfg; | |
464 | ||
465 | spinlock_t lock; | |
466 | /* Maximum possible events/irqs */ | |
467 | int events[32]; | |
468 | /* BUS address of MicroCode buffer */ | |
469 | dma_addr_t mcode_bus; | |
470 | /* CPU address of MicroCode buffer */ | |
471 | void *mcode_cpu; | |
472 | /* List of all Channel threads */ | |
473 | struct pl330_thread *channels; | |
474 | /* Pointer to the MANAGER thread */ | |
475 | struct pl330_thread *manager; | |
476 | /* To handle bad news in interrupt */ | |
477 | struct tasklet_struct tasks; | |
478 | struct _pl330_tbd dmac_tbd; | |
479 | /* State of DMAC operation */ | |
480 | enum pl330_dmac_state state; | |
481 | /* Holds list of reqs with due callbacks */ | |
482 | struct list_head req_done; | |
483 | ||
b3040e40 | 484 | /* Peripheral channels connected to this DMAC */ |
70cbb163 | 485 | unsigned int num_peripherals; |
4e0e6109 | 486 | struct dma_pl330_chan *peripherals; /* keep at end */ |
b3040e40 JB |
487 | }; |
488 | ||
489 | struct dma_pl330_desc { | |
490 | /* To attach to a queue as child */ | |
491 | struct list_head node; | |
492 | ||
493 | /* Descriptor for the DMA Engine API */ | |
494 | struct dma_async_tx_descriptor txd; | |
495 | ||
496 | /* Xfer for PL330 core */ | |
497 | struct pl330_xfer px; | |
498 | ||
499 | struct pl330_reqcfg rqcfg; | |
b3040e40 JB |
500 | |
501 | enum desc_status status; | |
502 | ||
503 | /* The channel which currently holds this desc */ | |
504 | struct dma_pl330_chan *pchan; | |
9dc5a315 LPC |
505 | |
506 | enum dma_transfer_direction rqtype; | |
507 | /* Index of peripheral for the xfer. */ | |
508 | unsigned peri:5; | |
509 | /* Hook to attach to DMAC's list of reqs with due callback */ | |
510 | struct list_head rqd; | |
511 | }; | |
512 | ||
513 | struct _xfer_spec { | |
514 | u32 ccr; | |
515 | struct dma_pl330_desc *desc; | |
b3040e40 JB |
516 | }; |
517 | ||
b7d861d9 BK |
518 | static inline bool _queue_empty(struct pl330_thread *thrd) |
519 | { | |
8ed30a14 | 520 | return thrd->req[0].desc == NULL && thrd->req[1].desc == NULL; |
b7d861d9 BK |
521 | } |
522 | ||
523 | static inline bool _queue_full(struct pl330_thread *thrd) | |
524 | { | |
8ed30a14 | 525 | return thrd->req[0].desc != NULL && thrd->req[1].desc != NULL; |
b7d861d9 BK |
526 | } |
527 | ||
528 | static inline bool is_manager(struct pl330_thread *thrd) | |
529 | { | |
fbbcd9be | 530 | return thrd->dmac->manager == thrd; |
b7d861d9 BK |
531 | } |
532 | ||
533 | /* If manager of the thread is in Non-Secure mode */ | |
534 | static inline bool _manager_ns(struct pl330_thread *thrd) | |
535 | { | |
f6f2421c | 536 | return (thrd->dmac->pcfg.mode & DMAC_MODE_NS) ? true : false; |
b7d861d9 BK |
537 | } |
538 | ||
3ecf51a4 BK |
539 | static inline u32 get_revision(u32 periph_id) |
540 | { | |
541 | return (periph_id >> PERIPH_REV_SHIFT) & PERIPH_REV_MASK; | |
542 | } | |
543 | ||
b7d861d9 BK |
544 | static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[], |
545 | enum pl330_dst da, u16 val) | |
546 | { | |
547 | if (dry_run) | |
548 | return SZ_DMAADDH; | |
549 | ||
550 | buf[0] = CMD_DMAADDH; | |
551 | buf[0] |= (da << 1); | |
552 | *((u16 *)&buf[1]) = val; | |
553 | ||
554 | PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n", | |
555 | da == 1 ? "DA" : "SA", val); | |
556 | ||
557 | return SZ_DMAADDH; | |
558 | } | |
559 | ||
560 | static inline u32 _emit_END(unsigned dry_run, u8 buf[]) | |
561 | { | |
562 | if (dry_run) | |
563 | return SZ_DMAEND; | |
564 | ||
565 | buf[0] = CMD_DMAEND; | |
566 | ||
567 | PL330_DBGCMD_DUMP(SZ_DMAEND, "\tDMAEND\n"); | |
568 | ||
569 | return SZ_DMAEND; | |
570 | } | |
571 | ||
572 | static inline u32 _emit_FLUSHP(unsigned dry_run, u8 buf[], u8 peri) | |
573 | { | |
574 | if (dry_run) | |
575 | return SZ_DMAFLUSHP; | |
576 | ||
577 | buf[0] = CMD_DMAFLUSHP; | |
578 | ||
579 | peri &= 0x1f; | |
580 | peri <<= 3; | |
581 | buf[1] = peri; | |
582 | ||
583 | PL330_DBGCMD_DUMP(SZ_DMAFLUSHP, "\tDMAFLUSHP %u\n", peri >> 3); | |
584 | ||
585 | return SZ_DMAFLUSHP; | |
586 | } | |
587 | ||
588 | static inline u32 _emit_LD(unsigned dry_run, u8 buf[], enum pl330_cond cond) | |
589 | { | |
590 | if (dry_run) | |
591 | return SZ_DMALD; | |
592 | ||
593 | buf[0] = CMD_DMALD; | |
594 | ||
595 | if (cond == SINGLE) | |
596 | buf[0] |= (0 << 1) | (1 << 0); | |
597 | else if (cond == BURST) | |
598 | buf[0] |= (1 << 1) | (1 << 0); | |
599 | ||
600 | PL330_DBGCMD_DUMP(SZ_DMALD, "\tDMALD%c\n", | |
601 | cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A')); | |
602 | ||
603 | return SZ_DMALD; | |
604 | } | |
605 | ||
606 | static inline u32 _emit_LDP(unsigned dry_run, u8 buf[], | |
607 | enum pl330_cond cond, u8 peri) | |
608 | { | |
609 | if (dry_run) | |
610 | return SZ_DMALDP; | |
611 | ||
612 | buf[0] = CMD_DMALDP; | |
613 | ||
614 | if (cond == BURST) | |
615 | buf[0] |= (1 << 1); | |
616 | ||
617 | peri &= 0x1f; | |
618 | peri <<= 3; | |
619 | buf[1] = peri; | |
620 | ||
621 | PL330_DBGCMD_DUMP(SZ_DMALDP, "\tDMALDP%c %u\n", | |
622 | cond == SINGLE ? 'S' : 'B', peri >> 3); | |
623 | ||
624 | return SZ_DMALDP; | |
625 | } | |
626 | ||
627 | static inline u32 _emit_LP(unsigned dry_run, u8 buf[], | |
628 | unsigned loop, u8 cnt) | |
629 | { | |
630 | if (dry_run) | |
631 | return SZ_DMALP; | |
632 | ||
633 | buf[0] = CMD_DMALP; | |
634 | ||
635 | if (loop) | |
636 | buf[0] |= (1 << 1); | |
637 | ||
638 | cnt--; /* DMAC increments by 1 internally */ | |
639 | buf[1] = cnt; | |
640 | ||
641 | PL330_DBGCMD_DUMP(SZ_DMALP, "\tDMALP_%c %u\n", loop ? '1' : '0', cnt); | |
642 | ||
643 | return SZ_DMALP; | |
644 | } | |
645 | ||
646 | struct _arg_LPEND { | |
647 | enum pl330_cond cond; | |
648 | bool forever; | |
649 | unsigned loop; | |
650 | u8 bjump; | |
651 | }; | |
652 | ||
653 | static inline u32 _emit_LPEND(unsigned dry_run, u8 buf[], | |
654 | const struct _arg_LPEND *arg) | |
655 | { | |
656 | enum pl330_cond cond = arg->cond; | |
657 | bool forever = arg->forever; | |
658 | unsigned loop = arg->loop; | |
659 | u8 bjump = arg->bjump; | |
660 | ||
661 | if (dry_run) | |
662 | return SZ_DMALPEND; | |
663 | ||
664 | buf[0] = CMD_DMALPEND; | |
665 | ||
666 | if (loop) | |
667 | buf[0] |= (1 << 2); | |
668 | ||
669 | if (!forever) | |
670 | buf[0] |= (1 << 4); | |
671 | ||
672 | if (cond == SINGLE) | |
673 | buf[0] |= (0 << 1) | (1 << 0); | |
674 | else if (cond == BURST) | |
675 | buf[0] |= (1 << 1) | (1 << 0); | |
676 | ||
677 | buf[1] = bjump; | |
678 | ||
679 | PL330_DBGCMD_DUMP(SZ_DMALPEND, "\tDMALP%s%c_%c bjmpto_%x\n", | |
680 | forever ? "FE" : "END", | |
681 | cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'), | |
682 | loop ? '1' : '0', | |
683 | bjump); | |
684 | ||
685 | return SZ_DMALPEND; | |
686 | } | |
687 | ||
688 | static inline u32 _emit_KILL(unsigned dry_run, u8 buf[]) | |
689 | { | |
690 | if (dry_run) | |
691 | return SZ_DMAKILL; | |
692 | ||
693 | buf[0] = CMD_DMAKILL; | |
694 | ||
695 | return SZ_DMAKILL; | |
696 | } | |
697 | ||
698 | static inline u32 _emit_MOV(unsigned dry_run, u8 buf[], | |
699 | enum dmamov_dst dst, u32 val) | |
700 | { | |
701 | if (dry_run) | |
702 | return SZ_DMAMOV; | |
703 | ||
704 | buf[0] = CMD_DMAMOV; | |
705 | buf[1] = dst; | |
706 | *((u32 *)&buf[2]) = val; | |
707 | ||
708 | PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n", | |
709 | dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val); | |
710 | ||
711 | return SZ_DMAMOV; | |
712 | } | |
713 | ||
714 | static inline u32 _emit_NOP(unsigned dry_run, u8 buf[]) | |
715 | { | |
716 | if (dry_run) | |
717 | return SZ_DMANOP; | |
718 | ||
719 | buf[0] = CMD_DMANOP; | |
720 | ||
721 | PL330_DBGCMD_DUMP(SZ_DMANOP, "\tDMANOP\n"); | |
722 | ||
723 | return SZ_DMANOP; | |
724 | } | |
725 | ||
726 | static inline u32 _emit_RMB(unsigned dry_run, u8 buf[]) | |
727 | { | |
728 | if (dry_run) | |
729 | return SZ_DMARMB; | |
730 | ||
731 | buf[0] = CMD_DMARMB; | |
732 | ||
733 | PL330_DBGCMD_DUMP(SZ_DMARMB, "\tDMARMB\n"); | |
734 | ||
735 | return SZ_DMARMB; | |
736 | } | |
737 | ||
738 | static inline u32 _emit_SEV(unsigned dry_run, u8 buf[], u8 ev) | |
739 | { | |
740 | if (dry_run) | |
741 | return SZ_DMASEV; | |
742 | ||
743 | buf[0] = CMD_DMASEV; | |
744 | ||
745 | ev &= 0x1f; | |
746 | ev <<= 3; | |
747 | buf[1] = ev; | |
748 | ||
749 | PL330_DBGCMD_DUMP(SZ_DMASEV, "\tDMASEV %u\n", ev >> 3); | |
750 | ||
751 | return SZ_DMASEV; | |
752 | } | |
753 | ||
754 | static inline u32 _emit_ST(unsigned dry_run, u8 buf[], enum pl330_cond cond) | |
755 | { | |
756 | if (dry_run) | |
757 | return SZ_DMAST; | |
758 | ||
759 | buf[0] = CMD_DMAST; | |
760 | ||
761 | if (cond == SINGLE) | |
762 | buf[0] |= (0 << 1) | (1 << 0); | |
763 | else if (cond == BURST) | |
764 | buf[0] |= (1 << 1) | (1 << 0); | |
765 | ||
766 | PL330_DBGCMD_DUMP(SZ_DMAST, "\tDMAST%c\n", | |
767 | cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A')); | |
768 | ||
769 | return SZ_DMAST; | |
770 | } | |
771 | ||
772 | static inline u32 _emit_STP(unsigned dry_run, u8 buf[], | |
773 | enum pl330_cond cond, u8 peri) | |
774 | { | |
775 | if (dry_run) | |
776 | return SZ_DMASTP; | |
777 | ||
778 | buf[0] = CMD_DMASTP; | |
779 | ||
780 | if (cond == BURST) | |
781 | buf[0] |= (1 << 1); | |
782 | ||
783 | peri &= 0x1f; | |
784 | peri <<= 3; | |
785 | buf[1] = peri; | |
786 | ||
787 | PL330_DBGCMD_DUMP(SZ_DMASTP, "\tDMASTP%c %u\n", | |
788 | cond == SINGLE ? 'S' : 'B', peri >> 3); | |
789 | ||
790 | return SZ_DMASTP; | |
791 | } | |
792 | ||
793 | static inline u32 _emit_STZ(unsigned dry_run, u8 buf[]) | |
794 | { | |
795 | if (dry_run) | |
796 | return SZ_DMASTZ; | |
797 | ||
798 | buf[0] = CMD_DMASTZ; | |
799 | ||
800 | PL330_DBGCMD_DUMP(SZ_DMASTZ, "\tDMASTZ\n"); | |
801 | ||
802 | return SZ_DMASTZ; | |
803 | } | |
804 | ||
805 | static inline u32 _emit_WFE(unsigned dry_run, u8 buf[], u8 ev, | |
806 | unsigned invalidate) | |
807 | { | |
808 | if (dry_run) | |
809 | return SZ_DMAWFE; | |
810 | ||
811 | buf[0] = CMD_DMAWFE; | |
812 | ||
813 | ev &= 0x1f; | |
814 | ev <<= 3; | |
815 | buf[1] = ev; | |
816 | ||
817 | if (invalidate) | |
818 | buf[1] |= (1 << 1); | |
819 | ||
820 | PL330_DBGCMD_DUMP(SZ_DMAWFE, "\tDMAWFE %u%s\n", | |
821 | ev >> 3, invalidate ? ", I" : ""); | |
822 | ||
823 | return SZ_DMAWFE; | |
824 | } | |
825 | ||
826 | static inline u32 _emit_WFP(unsigned dry_run, u8 buf[], | |
827 | enum pl330_cond cond, u8 peri) | |
828 | { | |
829 | if (dry_run) | |
830 | return SZ_DMAWFP; | |
831 | ||
832 | buf[0] = CMD_DMAWFP; | |
833 | ||
834 | if (cond == SINGLE) | |
835 | buf[0] |= (0 << 1) | (0 << 0); | |
836 | else if (cond == BURST) | |
837 | buf[0] |= (1 << 1) | (0 << 0); | |
838 | else | |
839 | buf[0] |= (0 << 1) | (1 << 0); | |
840 | ||
841 | peri &= 0x1f; | |
842 | peri <<= 3; | |
843 | buf[1] = peri; | |
844 | ||
845 | PL330_DBGCMD_DUMP(SZ_DMAWFP, "\tDMAWFP%c %u\n", | |
846 | cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'P'), peri >> 3); | |
847 | ||
848 | return SZ_DMAWFP; | |
849 | } | |
850 | ||
851 | static inline u32 _emit_WMB(unsigned dry_run, u8 buf[]) | |
852 | { | |
853 | if (dry_run) | |
854 | return SZ_DMAWMB; | |
855 | ||
856 | buf[0] = CMD_DMAWMB; | |
857 | ||
858 | PL330_DBGCMD_DUMP(SZ_DMAWMB, "\tDMAWMB\n"); | |
859 | ||
860 | return SZ_DMAWMB; | |
861 | } | |
862 | ||
863 | struct _arg_GO { | |
864 | u8 chan; | |
865 | u32 addr; | |
866 | unsigned ns; | |
867 | }; | |
868 | ||
869 | static inline u32 _emit_GO(unsigned dry_run, u8 buf[], | |
870 | const struct _arg_GO *arg) | |
871 | { | |
872 | u8 chan = arg->chan; | |
873 | u32 addr = arg->addr; | |
874 | unsigned ns = arg->ns; | |
875 | ||
876 | if (dry_run) | |
877 | return SZ_DMAGO; | |
878 | ||
879 | buf[0] = CMD_DMAGO; | |
880 | buf[0] |= (ns << 1); | |
881 | ||
882 | buf[1] = chan & 0x7; | |
883 | ||
884 | *((u32 *)&buf[2]) = addr; | |
885 | ||
886 | return SZ_DMAGO; | |
887 | } | |
888 | ||
889 | #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) | |
890 | ||
891 | /* Returns Time-Out */ | |
892 | static bool _until_dmac_idle(struct pl330_thread *thrd) | |
893 | { | |
f6f2421c | 894 | void __iomem *regs = thrd->dmac->base; |
b7d861d9 BK |
895 | unsigned long loops = msecs_to_loops(5); |
896 | ||
897 | do { | |
898 | /* Until Manager is Idle */ | |
899 | if (!(readl(regs + DBGSTATUS) & DBG_BUSY)) | |
900 | break; | |
901 | ||
902 | cpu_relax(); | |
903 | } while (--loops); | |
904 | ||
905 | if (!loops) | |
906 | return true; | |
907 | ||
908 | return false; | |
909 | } | |
910 | ||
911 | static inline void _execute_DBGINSN(struct pl330_thread *thrd, | |
912 | u8 insn[], bool as_manager) | |
913 | { | |
f6f2421c | 914 | void __iomem *regs = thrd->dmac->base; |
b7d861d9 BK |
915 | u32 val; |
916 | ||
917 | val = (insn[0] << 16) | (insn[1] << 24); | |
918 | if (!as_manager) { | |
919 | val |= (1 << 0); | |
920 | val |= (thrd->id << 8); /* Channel Number */ | |
921 | } | |
922 | writel(val, regs + DBGINST0); | |
923 | ||
924 | val = *((u32 *)&insn[2]); | |
925 | writel(val, regs + DBGINST1); | |
926 | ||
927 | /* If timed out due to halted state-machine */ | |
928 | if (_until_dmac_idle(thrd)) { | |
f6f2421c | 929 | dev_err(thrd->dmac->ddma.dev, "DMAC halted!\n"); |
b7d861d9 BK |
930 | return; |
931 | } | |
932 | ||
933 | /* Get going */ | |
934 | writel(0, regs + DBGCMD); | |
935 | } | |
936 | ||
b7d861d9 BK |
937 | static inline u32 _state(struct pl330_thread *thrd) |
938 | { | |
f6f2421c | 939 | void __iomem *regs = thrd->dmac->base; |
b7d861d9 BK |
940 | u32 val; |
941 | ||
942 | if (is_manager(thrd)) | |
943 | val = readl(regs + DS) & 0xf; | |
944 | else | |
945 | val = readl(regs + CS(thrd->id)) & 0xf; | |
946 | ||
947 | switch (val) { | |
948 | case DS_ST_STOP: | |
949 | return PL330_STATE_STOPPED; | |
950 | case DS_ST_EXEC: | |
951 | return PL330_STATE_EXECUTING; | |
952 | case DS_ST_CMISS: | |
953 | return PL330_STATE_CACHEMISS; | |
954 | case DS_ST_UPDTPC: | |
955 | return PL330_STATE_UPDTPC; | |
956 | case DS_ST_WFE: | |
957 | return PL330_STATE_WFE; | |
958 | case DS_ST_FAULT: | |
959 | return PL330_STATE_FAULTING; | |
960 | case DS_ST_ATBRR: | |
961 | if (is_manager(thrd)) | |
962 | return PL330_STATE_INVALID; | |
963 | else | |
964 | return PL330_STATE_ATBARRIER; | |
965 | case DS_ST_QBUSY: | |
966 | if (is_manager(thrd)) | |
967 | return PL330_STATE_INVALID; | |
968 | else | |
969 | return PL330_STATE_QUEUEBUSY; | |
970 | case DS_ST_WFP: | |
971 | if (is_manager(thrd)) | |
972 | return PL330_STATE_INVALID; | |
973 | else | |
974 | return PL330_STATE_WFP; | |
975 | case DS_ST_KILL: | |
976 | if (is_manager(thrd)) | |
977 | return PL330_STATE_INVALID; | |
978 | else | |
979 | return PL330_STATE_KILLING; | |
980 | case DS_ST_CMPLT: | |
981 | if (is_manager(thrd)) | |
982 | return PL330_STATE_INVALID; | |
983 | else | |
984 | return PL330_STATE_COMPLETING; | |
985 | case DS_ST_FLTCMP: | |
986 | if (is_manager(thrd)) | |
987 | return PL330_STATE_INVALID; | |
988 | else | |
989 | return PL330_STATE_FAULT_COMPLETING; | |
990 | default: | |
991 | return PL330_STATE_INVALID; | |
992 | } | |
993 | } | |
994 | ||
995 | static void _stop(struct pl330_thread *thrd) | |
996 | { | |
f6f2421c | 997 | void __iomem *regs = thrd->dmac->base; |
b7d861d9 BK |
998 | u8 insn[6] = {0, 0, 0, 0, 0, 0}; |
999 | ||
1000 | if (_state(thrd) == PL330_STATE_FAULT_COMPLETING) | |
1001 | UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING); | |
1002 | ||
1003 | /* Return if nothing needs to be done */ | |
1004 | if (_state(thrd) == PL330_STATE_COMPLETING | |
1005 | || _state(thrd) == PL330_STATE_KILLING | |
1006 | || _state(thrd) == PL330_STATE_STOPPED) | |
1007 | return; | |
1008 | ||
1009 | _emit_KILL(0, insn); | |
1010 | ||
1011 | /* Stop generating interrupts for SEV */ | |
1012 | writel(readl(regs + INTEN) & ~(1 << thrd->ev), regs + INTEN); | |
1013 | ||
1014 | _execute_DBGINSN(thrd, insn, is_manager(thrd)); | |
1015 | } | |
1016 | ||
1017 | /* Start doing req 'idx' of thread 'thrd' */ | |
1018 | static bool _trigger(struct pl330_thread *thrd) | |
1019 | { | |
f6f2421c | 1020 | void __iomem *regs = thrd->dmac->base; |
b7d861d9 | 1021 | struct _pl330_req *req; |
9dc5a315 | 1022 | struct dma_pl330_desc *desc; |
b7d861d9 BK |
1023 | struct _arg_GO go; |
1024 | unsigned ns; | |
1025 | u8 insn[6] = {0, 0, 0, 0, 0, 0}; | |
1026 | int idx; | |
1027 | ||
1028 | /* Return if already ACTIVE */ | |
1029 | if (_state(thrd) != PL330_STATE_STOPPED) | |
1030 | return true; | |
1031 | ||
1032 | idx = 1 - thrd->lstenq; | |
8ed30a14 | 1033 | if (thrd->req[idx].desc != NULL) { |
b7d861d9 | 1034 | req = &thrd->req[idx]; |
8ed30a14 | 1035 | } else { |
b7d861d9 | 1036 | idx = thrd->lstenq; |
8ed30a14 | 1037 | if (thrd->req[idx].desc != NULL) |
b7d861d9 BK |
1038 | req = &thrd->req[idx]; |
1039 | else | |
1040 | req = NULL; | |
1041 | } | |
1042 | ||
1043 | /* Return if no request */ | |
8ed30a14 | 1044 | if (!req) |
b7d861d9 BK |
1045 | return true; |
1046 | ||
9dc5a315 | 1047 | desc = req->desc; |
b7d861d9 | 1048 | |
9dc5a315 | 1049 | ns = desc->rqcfg.nonsecure ? 1 : 0; |
b7d861d9 BK |
1050 | |
1051 | /* See 'Abort Sources' point-4 at Page 2-25 */ | |
1052 | if (_manager_ns(thrd) && !ns) | |
f6f2421c | 1053 | dev_info(thrd->dmac->ddma.dev, "%s:%d Recipe for ABORT!\n", |
b7d861d9 BK |
1054 | __func__, __LINE__); |
1055 | ||
1056 | go.chan = thrd->id; | |
1057 | go.addr = req->mc_bus; | |
1058 | go.ns = ns; | |
1059 | _emit_GO(0, insn, &go); | |
1060 | ||
1061 | /* Set to generate interrupts for SEV */ | |
1062 | writel(readl(regs + INTEN) | (1 << thrd->ev), regs + INTEN); | |
1063 | ||
1064 | /* Only manager can execute GO */ | |
1065 | _execute_DBGINSN(thrd, insn, true); | |
1066 | ||
1067 | thrd->req_running = idx; | |
1068 | ||
1069 | return true; | |
1070 | } | |
1071 | ||
1072 | static bool _start(struct pl330_thread *thrd) | |
1073 | { | |
1074 | switch (_state(thrd)) { | |
1075 | case PL330_STATE_FAULT_COMPLETING: | |
1076 | UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING); | |
1077 | ||
1078 | if (_state(thrd) == PL330_STATE_KILLING) | |
1079 | UNTIL(thrd, PL330_STATE_STOPPED) | |
1080 | ||
1081 | case PL330_STATE_FAULTING: | |
1082 | _stop(thrd); | |
1083 | ||
1084 | case PL330_STATE_KILLING: | |
1085 | case PL330_STATE_COMPLETING: | |
1086 | UNTIL(thrd, PL330_STATE_STOPPED) | |
1087 | ||
1088 | case PL330_STATE_STOPPED: | |
1089 | return _trigger(thrd); | |
1090 | ||
1091 | case PL330_STATE_WFP: | |
1092 | case PL330_STATE_QUEUEBUSY: | |
1093 | case PL330_STATE_ATBARRIER: | |
1094 | case PL330_STATE_UPDTPC: | |
1095 | case PL330_STATE_CACHEMISS: | |
1096 | case PL330_STATE_EXECUTING: | |
1097 | return true; | |
1098 | ||
1099 | case PL330_STATE_WFE: /* For RESUME, nothing yet */ | |
1100 | default: | |
1101 | return false; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | static inline int _ldst_memtomem(unsigned dry_run, u8 buf[], | |
1106 | const struct _xfer_spec *pxs, int cyc) | |
1107 | { | |
1108 | int off = 0; | |
9dc5a315 | 1109 | struct pl330_config *pcfg = pxs->desc->rqcfg.pcfg; |
b7d861d9 | 1110 | |
3ecf51a4 BK |
1111 | /* check lock-up free version */ |
1112 | if (get_revision(pcfg->periph_id) >= PERIPH_REV_R1P0) { | |
1113 | while (cyc--) { | |
1114 | off += _emit_LD(dry_run, &buf[off], ALWAYS); | |
1115 | off += _emit_ST(dry_run, &buf[off], ALWAYS); | |
1116 | } | |
1117 | } else { | |
1118 | while (cyc--) { | |
1119 | off += _emit_LD(dry_run, &buf[off], ALWAYS); | |
1120 | off += _emit_RMB(dry_run, &buf[off]); | |
1121 | off += _emit_ST(dry_run, &buf[off], ALWAYS); | |
1122 | off += _emit_WMB(dry_run, &buf[off]); | |
1123 | } | |
b7d861d9 BK |
1124 | } |
1125 | ||
1126 | return off; | |
1127 | } | |
1128 | ||
1129 | static inline int _ldst_devtomem(unsigned dry_run, u8 buf[], | |
1130 | const struct _xfer_spec *pxs, int cyc) | |
1131 | { | |
1132 | int off = 0; | |
1133 | ||
1134 | while (cyc--) { | |
9dc5a315 LPC |
1135 | off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri); |
1136 | off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri); | |
b7d861d9 | 1137 | off += _emit_ST(dry_run, &buf[off], ALWAYS); |
9dc5a315 | 1138 | off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri); |
b7d861d9 BK |
1139 | } |
1140 | ||
1141 | return off; | |
1142 | } | |
1143 | ||
1144 | static inline int _ldst_memtodev(unsigned dry_run, u8 buf[], | |
1145 | const struct _xfer_spec *pxs, int cyc) | |
1146 | { | |
1147 | int off = 0; | |
1148 | ||
1149 | while (cyc--) { | |
9dc5a315 | 1150 | off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri); |
b7d861d9 | 1151 | off += _emit_LD(dry_run, &buf[off], ALWAYS); |
9dc5a315 LPC |
1152 | off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri); |
1153 | off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri); | |
b7d861d9 BK |
1154 | } |
1155 | ||
1156 | return off; | |
1157 | } | |
1158 | ||
1159 | static int _bursts(unsigned dry_run, u8 buf[], | |
1160 | const struct _xfer_spec *pxs, int cyc) | |
1161 | { | |
1162 | int off = 0; | |
1163 | ||
9dc5a315 | 1164 | switch (pxs->desc->rqtype) { |
585a9d0b | 1165 | case DMA_MEM_TO_DEV: |
b7d861d9 BK |
1166 | off += _ldst_memtodev(dry_run, &buf[off], pxs, cyc); |
1167 | break; | |
585a9d0b | 1168 | case DMA_DEV_TO_MEM: |
b7d861d9 BK |
1169 | off += _ldst_devtomem(dry_run, &buf[off], pxs, cyc); |
1170 | break; | |
585a9d0b | 1171 | case DMA_MEM_TO_MEM: |
b7d861d9 BK |
1172 | off += _ldst_memtomem(dry_run, &buf[off], pxs, cyc); |
1173 | break; | |
1174 | default: | |
1175 | off += 0x40000000; /* Scare off the Client */ | |
1176 | break; | |
1177 | } | |
1178 | ||
1179 | return off; | |
1180 | } | |
1181 | ||
1182 | /* Returns bytes consumed and updates bursts */ | |
1183 | static inline int _loop(unsigned dry_run, u8 buf[], | |
1184 | unsigned long *bursts, const struct _xfer_spec *pxs) | |
1185 | { | |
1186 | int cyc, cycmax, szlp, szlpend, szbrst, off; | |
1187 | unsigned lcnt0, lcnt1, ljmp0, ljmp1; | |
1188 | struct _arg_LPEND lpend; | |
1189 | ||
1190 | /* Max iterations possible in DMALP is 256 */ | |
1191 | if (*bursts >= 256*256) { | |
1192 | lcnt1 = 256; | |
1193 | lcnt0 = 256; | |
1194 | cyc = *bursts / lcnt1 / lcnt0; | |
1195 | } else if (*bursts > 256) { | |
1196 | lcnt1 = 256; | |
1197 | lcnt0 = *bursts / lcnt1; | |
1198 | cyc = 1; | |
1199 | } else { | |
1200 | lcnt1 = *bursts; | |
1201 | lcnt0 = 0; | |
1202 | cyc = 1; | |
1203 | } | |
1204 | ||
1205 | szlp = _emit_LP(1, buf, 0, 0); | |
1206 | szbrst = _bursts(1, buf, pxs, 1); | |
1207 | ||
1208 | lpend.cond = ALWAYS; | |
1209 | lpend.forever = false; | |
1210 | lpend.loop = 0; | |
1211 | lpend.bjump = 0; | |
1212 | szlpend = _emit_LPEND(1, buf, &lpend); | |
1213 | ||
1214 | if (lcnt0) { | |
1215 | szlp *= 2; | |
1216 | szlpend *= 2; | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * Max bursts that we can unroll due to limit on the | |
1221 | * size of backward jump that can be encoded in DMALPEND | |
1222 | * which is 8-bits and hence 255 | |
1223 | */ | |
1224 | cycmax = (255 - (szlp + szlpend)) / szbrst; | |
1225 | ||
1226 | cyc = (cycmax < cyc) ? cycmax : cyc; | |
1227 | ||
1228 | off = 0; | |
1229 | ||
1230 | if (lcnt0) { | |
1231 | off += _emit_LP(dry_run, &buf[off], 0, lcnt0); | |
1232 | ljmp0 = off; | |
1233 | } | |
1234 | ||
1235 | off += _emit_LP(dry_run, &buf[off], 1, lcnt1); | |
1236 | ljmp1 = off; | |
1237 | ||
1238 | off += _bursts(dry_run, &buf[off], pxs, cyc); | |
1239 | ||
1240 | lpend.cond = ALWAYS; | |
1241 | lpend.forever = false; | |
1242 | lpend.loop = 1; | |
1243 | lpend.bjump = off - ljmp1; | |
1244 | off += _emit_LPEND(dry_run, &buf[off], &lpend); | |
1245 | ||
1246 | if (lcnt0) { | |
1247 | lpend.cond = ALWAYS; | |
1248 | lpend.forever = false; | |
1249 | lpend.loop = 0; | |
1250 | lpend.bjump = off - ljmp0; | |
1251 | off += _emit_LPEND(dry_run, &buf[off], &lpend); | |
1252 | } | |
1253 | ||
1254 | *bursts = lcnt1 * cyc; | |
1255 | if (lcnt0) | |
1256 | *bursts *= lcnt0; | |
1257 | ||
1258 | return off; | |
1259 | } | |
1260 | ||
1261 | static inline int _setup_loops(unsigned dry_run, u8 buf[], | |
1262 | const struct _xfer_spec *pxs) | |
1263 | { | |
9dc5a315 | 1264 | struct pl330_xfer *x = &pxs->desc->px; |
b7d861d9 BK |
1265 | u32 ccr = pxs->ccr; |
1266 | unsigned long c, bursts = BYTE_TO_BURST(x->bytes, ccr); | |
1267 | int off = 0; | |
1268 | ||
1269 | while (bursts) { | |
1270 | c = bursts; | |
1271 | off += _loop(dry_run, &buf[off], &c, pxs); | |
1272 | bursts -= c; | |
1273 | } | |
1274 | ||
1275 | return off; | |
1276 | } | |
1277 | ||
1278 | static inline int _setup_xfer(unsigned dry_run, u8 buf[], | |
1279 | const struct _xfer_spec *pxs) | |
1280 | { | |
9dc5a315 | 1281 | struct pl330_xfer *x = &pxs->desc->px; |
b7d861d9 BK |
1282 | int off = 0; |
1283 | ||
1284 | /* DMAMOV SAR, x->src_addr */ | |
1285 | off += _emit_MOV(dry_run, &buf[off], SAR, x->src_addr); | |
1286 | /* DMAMOV DAR, x->dst_addr */ | |
1287 | off += _emit_MOV(dry_run, &buf[off], DAR, x->dst_addr); | |
1288 | ||
1289 | /* Setup Loop(s) */ | |
1290 | off += _setup_loops(dry_run, &buf[off], pxs); | |
1291 | ||
1292 | return off; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * A req is a sequence of one or more xfer units. | |
1297 | * Returns the number of bytes taken to setup the MC for the req. | |
1298 | */ | |
1299 | static int _setup_req(unsigned dry_run, struct pl330_thread *thrd, | |
1300 | unsigned index, struct _xfer_spec *pxs) | |
1301 | { | |
1302 | struct _pl330_req *req = &thrd->req[index]; | |
1303 | struct pl330_xfer *x; | |
1304 | u8 *buf = req->mc_cpu; | |
1305 | int off = 0; | |
1306 | ||
1307 | PL330_DBGMC_START(req->mc_bus); | |
1308 | ||
1309 | /* DMAMOV CCR, ccr */ | |
1310 | off += _emit_MOV(dry_run, &buf[off], CCR, pxs->ccr); | |
1311 | ||
9dc5a315 | 1312 | x = &pxs->desc->px; |
d5cef121 LPC |
1313 | /* Error if xfer length is not aligned at burst size */ |
1314 | if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr))) | |
1315 | return -EINVAL; | |
b7d861d9 | 1316 | |
d5cef121 | 1317 | off += _setup_xfer(dry_run, &buf[off], pxs); |
b7d861d9 BK |
1318 | |
1319 | /* DMASEV peripheral/event */ | |
1320 | off += _emit_SEV(dry_run, &buf[off], thrd->ev); | |
1321 | /* DMAEND */ | |
1322 | off += _emit_END(dry_run, &buf[off]); | |
1323 | ||
1324 | return off; | |
1325 | } | |
1326 | ||
1327 | static inline u32 _prepare_ccr(const struct pl330_reqcfg *rqc) | |
1328 | { | |
1329 | u32 ccr = 0; | |
1330 | ||
1331 | if (rqc->src_inc) | |
1332 | ccr |= CC_SRCINC; | |
1333 | ||
1334 | if (rqc->dst_inc) | |
1335 | ccr |= CC_DSTINC; | |
1336 | ||
1337 | /* We set same protection levels for Src and DST for now */ | |
1338 | if (rqc->privileged) | |
1339 | ccr |= CC_SRCPRI | CC_DSTPRI; | |
1340 | if (rqc->nonsecure) | |
1341 | ccr |= CC_SRCNS | CC_DSTNS; | |
1342 | if (rqc->insnaccess) | |
1343 | ccr |= CC_SRCIA | CC_DSTIA; | |
1344 | ||
1345 | ccr |= (((rqc->brst_len - 1) & 0xf) << CC_SRCBRSTLEN_SHFT); | |
1346 | ccr |= (((rqc->brst_len - 1) & 0xf) << CC_DSTBRSTLEN_SHFT); | |
1347 | ||
1348 | ccr |= (rqc->brst_size << CC_SRCBRSTSIZE_SHFT); | |
1349 | ccr |= (rqc->brst_size << CC_DSTBRSTSIZE_SHFT); | |
1350 | ||
1351 | ccr |= (rqc->scctl << CC_SRCCCTRL_SHFT); | |
1352 | ccr |= (rqc->dcctl << CC_DSTCCTRL_SHFT); | |
1353 | ||
1354 | ccr |= (rqc->swap << CC_SWAP_SHFT); | |
1355 | ||
1356 | return ccr; | |
1357 | } | |
1358 | ||
b7d861d9 BK |
1359 | /* |
1360 | * Submit a list of xfers after which the client wants notification. | |
1361 | * Client is not notified after each xfer unit, just once after all | |
1362 | * xfer units are done or some error occurs. | |
1363 | */ | |
9dc5a315 LPC |
1364 | static int pl330_submit_req(struct pl330_thread *thrd, |
1365 | struct dma_pl330_desc *desc) | |
b7d861d9 | 1366 | { |
f6f2421c | 1367 | struct pl330_dmac *pl330 = thrd->dmac; |
b7d861d9 BK |
1368 | struct _xfer_spec xs; |
1369 | unsigned long flags; | |
1370 | void __iomem *regs; | |
1371 | unsigned idx; | |
1372 | u32 ccr; | |
1373 | int ret = 0; | |
1374 | ||
1375 | /* No Req or Unacquired Channel or DMAC */ | |
9dc5a315 | 1376 | if (!desc || !thrd || thrd->free) |
b7d861d9 BK |
1377 | return -EINVAL; |
1378 | ||
f6f2421c | 1379 | regs = thrd->dmac->base; |
b7d861d9 BK |
1380 | |
1381 | if (pl330->state == DYING | |
1382 | || pl330->dmac_tbd.reset_chan & (1 << thrd->id)) { | |
f6f2421c | 1383 | dev_info(thrd->dmac->ddma.dev, "%s:%d\n", |
b7d861d9 BK |
1384 | __func__, __LINE__); |
1385 | return -EAGAIN; | |
1386 | } | |
1387 | ||
1388 | /* If request for non-existing peripheral */ | |
9dc5a315 LPC |
1389 | if (desc->rqtype != DMA_MEM_TO_MEM && |
1390 | desc->peri >= pl330->pcfg.num_peri) { | |
f6f2421c | 1391 | dev_info(thrd->dmac->ddma.dev, |
b7d861d9 | 1392 | "%s:%d Invalid peripheral(%u)!\n", |
9dc5a315 | 1393 | __func__, __LINE__, desc->peri); |
b7d861d9 BK |
1394 | return -EINVAL; |
1395 | } | |
1396 | ||
1397 | spin_lock_irqsave(&pl330->lock, flags); | |
1398 | ||
1399 | if (_queue_full(thrd)) { | |
1400 | ret = -EAGAIN; | |
1401 | goto xfer_exit; | |
1402 | } | |
1403 | ||
9dc5a315 LPC |
1404 | /* Prefer Secure Channel */ |
1405 | if (!_manager_ns(thrd)) | |
1406 | desc->rqcfg.nonsecure = 0; | |
1407 | else | |
1408 | desc->rqcfg.nonsecure = 1; | |
b7d861d9 | 1409 | |
9dc5a315 | 1410 | ccr = _prepare_ccr(&desc->rqcfg); |
b7d861d9 | 1411 | |
8ed30a14 | 1412 | idx = thrd->req[0].desc == NULL ? 0 : 1; |
b7d861d9 BK |
1413 | |
1414 | xs.ccr = ccr; | |
9dc5a315 | 1415 | xs.desc = desc; |
b7d861d9 BK |
1416 | |
1417 | /* First dry run to check if req is acceptable */ | |
1418 | ret = _setup_req(1, thrd, idx, &xs); | |
1419 | if (ret < 0) | |
1420 | goto xfer_exit; | |
1421 | ||
f6f2421c LPC |
1422 | if (ret > pl330->mcbufsz / 2) { |
1423 | dev_info(pl330->ddma.dev, "%s:%d Trying increasing mcbufsz\n", | |
b7d861d9 BK |
1424 | __func__, __LINE__); |
1425 | ret = -ENOMEM; | |
1426 | goto xfer_exit; | |
1427 | } | |
1428 | ||
1429 | /* Hook the request */ | |
1430 | thrd->lstenq = idx; | |
9dc5a315 | 1431 | thrd->req[idx].desc = desc; |
be025329 | 1432 | _setup_req(0, thrd, idx, &xs); |
b7d861d9 BK |
1433 | |
1434 | ret = 0; | |
1435 | ||
1436 | xfer_exit: | |
1437 | spin_unlock_irqrestore(&pl330->lock, flags); | |
1438 | ||
1439 | return ret; | |
1440 | } | |
1441 | ||
9dc5a315 | 1442 | static void dma_pl330_rqcb(struct dma_pl330_desc *desc, enum pl330_op_err err) |
6079d38c | 1443 | { |
b1e51d77 | 1444 | struct dma_pl330_chan *pch; |
6079d38c LPC |
1445 | unsigned long flags; |
1446 | ||
b1e51d77 JMC |
1447 | if (!desc) |
1448 | return; | |
1449 | ||
1450 | pch = desc->pchan; | |
1451 | ||
6079d38c LPC |
1452 | /* If desc aborted */ |
1453 | if (!pch) | |
1454 | return; | |
1455 | ||
1456 | spin_lock_irqsave(&pch->lock, flags); | |
1457 | ||
1458 | desc->status = DONE; | |
1459 | ||
1460 | spin_unlock_irqrestore(&pch->lock, flags); | |
1461 | ||
1462 | tasklet_schedule(&pch->task); | |
1463 | } | |
1464 | ||
b7d861d9 BK |
1465 | static void pl330_dotask(unsigned long data) |
1466 | { | |
1467 | struct pl330_dmac *pl330 = (struct pl330_dmac *) data; | |
b7d861d9 BK |
1468 | unsigned long flags; |
1469 | int i; | |
1470 | ||
1471 | spin_lock_irqsave(&pl330->lock, flags); | |
1472 | ||
1473 | /* The DMAC itself gone nuts */ | |
1474 | if (pl330->dmac_tbd.reset_dmac) { | |
1475 | pl330->state = DYING; | |
1476 | /* Reset the manager too */ | |
1477 | pl330->dmac_tbd.reset_mngr = true; | |
1478 | /* Clear the reset flag */ | |
1479 | pl330->dmac_tbd.reset_dmac = false; | |
1480 | } | |
1481 | ||
1482 | if (pl330->dmac_tbd.reset_mngr) { | |
1483 | _stop(pl330->manager); | |
1484 | /* Reset all channels */ | |
f6f2421c | 1485 | pl330->dmac_tbd.reset_chan = (1 << pl330->pcfg.num_chan) - 1; |
b7d861d9 BK |
1486 | /* Clear the reset flag */ |
1487 | pl330->dmac_tbd.reset_mngr = false; | |
1488 | } | |
1489 | ||
f6f2421c | 1490 | for (i = 0; i < pl330->pcfg.num_chan; i++) { |
b7d861d9 BK |
1491 | |
1492 | if (pl330->dmac_tbd.reset_chan & (1 << i)) { | |
1493 | struct pl330_thread *thrd = &pl330->channels[i]; | |
f6f2421c | 1494 | void __iomem *regs = pl330->base; |
b7d861d9 BK |
1495 | enum pl330_op_err err; |
1496 | ||
1497 | _stop(thrd); | |
1498 | ||
1499 | if (readl(regs + FSC) & (1 << thrd->id)) | |
1500 | err = PL330_ERR_FAIL; | |
1501 | else | |
1502 | err = PL330_ERR_ABORT; | |
1503 | ||
1504 | spin_unlock_irqrestore(&pl330->lock, flags); | |
9dc5a315 LPC |
1505 | dma_pl330_rqcb(thrd->req[1 - thrd->lstenq].desc, err); |
1506 | dma_pl330_rqcb(thrd->req[thrd->lstenq].desc, err); | |
b7d861d9 BK |
1507 | spin_lock_irqsave(&pl330->lock, flags); |
1508 | ||
9dc5a315 LPC |
1509 | thrd->req[0].desc = NULL; |
1510 | thrd->req[1].desc = NULL; | |
8ed30a14 | 1511 | thrd->req_running = -1; |
b7d861d9 BK |
1512 | |
1513 | /* Clear the reset flag */ | |
1514 | pl330->dmac_tbd.reset_chan &= ~(1 << i); | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | spin_unlock_irqrestore(&pl330->lock, flags); | |
1519 | ||
1520 | return; | |
1521 | } | |
1522 | ||
1523 | /* Returns 1 if state was updated, 0 otherwise */ | |
f6f2421c | 1524 | static int pl330_update(struct pl330_dmac *pl330) |
b7d861d9 | 1525 | { |
9dc5a315 | 1526 | struct dma_pl330_desc *descdone, *tmp; |
b7d861d9 BK |
1527 | unsigned long flags; |
1528 | void __iomem *regs; | |
1529 | u32 val; | |
1530 | int id, ev, ret = 0; | |
1531 | ||
f6f2421c | 1532 | regs = pl330->base; |
b7d861d9 BK |
1533 | |
1534 | spin_lock_irqsave(&pl330->lock, flags); | |
1535 | ||
1536 | val = readl(regs + FSM) & 0x1; | |
1537 | if (val) | |
1538 | pl330->dmac_tbd.reset_mngr = true; | |
1539 | else | |
1540 | pl330->dmac_tbd.reset_mngr = false; | |
1541 | ||
f6f2421c | 1542 | val = readl(regs + FSC) & ((1 << pl330->pcfg.num_chan) - 1); |
b7d861d9 BK |
1543 | pl330->dmac_tbd.reset_chan |= val; |
1544 | if (val) { | |
1545 | int i = 0; | |
f6f2421c | 1546 | while (i < pl330->pcfg.num_chan) { |
b7d861d9 | 1547 | if (val & (1 << i)) { |
f6f2421c | 1548 | dev_info(pl330->ddma.dev, |
b7d861d9 BK |
1549 | "Reset Channel-%d\t CS-%x FTC-%x\n", |
1550 | i, readl(regs + CS(i)), | |
1551 | readl(regs + FTC(i))); | |
1552 | _stop(&pl330->channels[i]); | |
1553 | } | |
1554 | i++; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | /* Check which event happened i.e, thread notified */ | |
1559 | val = readl(regs + ES); | |
f6f2421c LPC |
1560 | if (pl330->pcfg.num_events < 32 |
1561 | && val & ~((1 << pl330->pcfg.num_events) - 1)) { | |
b7d861d9 | 1562 | pl330->dmac_tbd.reset_dmac = true; |
f6f2421c LPC |
1563 | dev_err(pl330->ddma.dev, "%s:%d Unexpected!\n", __func__, |
1564 | __LINE__); | |
b7d861d9 BK |
1565 | ret = 1; |
1566 | goto updt_exit; | |
1567 | } | |
1568 | ||
f6f2421c | 1569 | for (ev = 0; ev < pl330->pcfg.num_events; ev++) { |
b7d861d9 BK |
1570 | if (val & (1 << ev)) { /* Event occurred */ |
1571 | struct pl330_thread *thrd; | |
1572 | u32 inten = readl(regs + INTEN); | |
1573 | int active; | |
1574 | ||
1575 | /* Clear the event */ | |
1576 | if (inten & (1 << ev)) | |
1577 | writel(1 << ev, regs + INTCLR); | |
1578 | ||
1579 | ret = 1; | |
1580 | ||
1581 | id = pl330->events[ev]; | |
1582 | ||
1583 | thrd = &pl330->channels[id]; | |
1584 | ||
1585 | active = thrd->req_running; | |
1586 | if (active == -1) /* Aborted */ | |
1587 | continue; | |
1588 | ||
fdec53d5 | 1589 | /* Detach the req */ |
9dc5a315 LPC |
1590 | descdone = thrd->req[active].desc; |
1591 | thrd->req[active].desc = NULL; | |
fdec53d5 | 1592 | |
b7d861d9 BK |
1593 | /* Get going again ASAP */ |
1594 | _start(thrd); | |
1595 | ||
1596 | /* For now, just make a list of callbacks to be done */ | |
9dc5a315 | 1597 | list_add_tail(&descdone->rqd, &pl330->req_done); |
b7d861d9 BK |
1598 | } |
1599 | } | |
1600 | ||
1601 | /* Now that we are in no hurry, do the callbacks */ | |
9dc5a315 LPC |
1602 | list_for_each_entry_safe(descdone, tmp, &pl330->req_done, rqd) { |
1603 | list_del(&descdone->rqd); | |
b7d861d9 | 1604 | spin_unlock_irqrestore(&pl330->lock, flags); |
9dc5a315 | 1605 | dma_pl330_rqcb(descdone, PL330_ERR_NONE); |
b7d861d9 BK |
1606 | spin_lock_irqsave(&pl330->lock, flags); |
1607 | } | |
1608 | ||
1609 | updt_exit: | |
1610 | spin_unlock_irqrestore(&pl330->lock, flags); | |
1611 | ||
1612 | if (pl330->dmac_tbd.reset_dmac | |
1613 | || pl330->dmac_tbd.reset_mngr | |
1614 | || pl330->dmac_tbd.reset_chan) { | |
1615 | ret = 1; | |
1616 | tasklet_schedule(&pl330->tasks); | |
1617 | } | |
1618 | ||
1619 | return ret; | |
1620 | } | |
1621 | ||
b7d861d9 BK |
1622 | /* Reserve an event */ |
1623 | static inline int _alloc_event(struct pl330_thread *thrd) | |
1624 | { | |
1625 | struct pl330_dmac *pl330 = thrd->dmac; | |
b7d861d9 BK |
1626 | int ev; |
1627 | ||
f6f2421c | 1628 | for (ev = 0; ev < pl330->pcfg.num_events; ev++) |
b7d861d9 BK |
1629 | if (pl330->events[ev] == -1) { |
1630 | pl330->events[ev] = thrd->id; | |
1631 | return ev; | |
1632 | } | |
1633 | ||
1634 | return -1; | |
1635 | } | |
1636 | ||
f6f2421c | 1637 | static bool _chan_ns(const struct pl330_dmac *pl330, int i) |
b7d861d9 | 1638 | { |
f6f2421c | 1639 | return pl330->pcfg.irq_ns & (1 << i); |
b7d861d9 BK |
1640 | } |
1641 | ||
1642 | /* Upon success, returns IdentityToken for the | |
1643 | * allocated channel, NULL otherwise. | |
1644 | */ | |
f6f2421c | 1645 | static struct pl330_thread *pl330_request_channel(struct pl330_dmac *pl330) |
b7d861d9 BK |
1646 | { |
1647 | struct pl330_thread *thrd = NULL; | |
b7d861d9 BK |
1648 | unsigned long flags; |
1649 | int chans, i; | |
1650 | ||
b7d861d9 BK |
1651 | if (pl330->state == DYING) |
1652 | return NULL; | |
1653 | ||
f6f2421c | 1654 | chans = pl330->pcfg.num_chan; |
b7d861d9 BK |
1655 | |
1656 | spin_lock_irqsave(&pl330->lock, flags); | |
1657 | ||
1658 | for (i = 0; i < chans; i++) { | |
1659 | thrd = &pl330->channels[i]; | |
1660 | if ((thrd->free) && (!_manager_ns(thrd) || | |
f6f2421c | 1661 | _chan_ns(pl330, i))) { |
b7d861d9 BK |
1662 | thrd->ev = _alloc_event(thrd); |
1663 | if (thrd->ev >= 0) { | |
1664 | thrd->free = false; | |
1665 | thrd->lstenq = 1; | |
9dc5a315 | 1666 | thrd->req[0].desc = NULL; |
9dc5a315 | 1667 | thrd->req[1].desc = NULL; |
8ed30a14 | 1668 | thrd->req_running = -1; |
b7d861d9 BK |
1669 | break; |
1670 | } | |
1671 | } | |
1672 | thrd = NULL; | |
1673 | } | |
1674 | ||
1675 | spin_unlock_irqrestore(&pl330->lock, flags); | |
1676 | ||
1677 | return thrd; | |
1678 | } | |
1679 | ||
1680 | /* Release an event */ | |
1681 | static inline void _free_event(struct pl330_thread *thrd, int ev) | |
1682 | { | |
1683 | struct pl330_dmac *pl330 = thrd->dmac; | |
b7d861d9 BK |
1684 | |
1685 | /* If the event is valid and was held by the thread */ | |
f6f2421c | 1686 | if (ev >= 0 && ev < pl330->pcfg.num_events |
b7d861d9 BK |
1687 | && pl330->events[ev] == thrd->id) |
1688 | pl330->events[ev] = -1; | |
1689 | } | |
1690 | ||
65ad6060 | 1691 | static void pl330_release_channel(struct pl330_thread *thrd) |
b7d861d9 | 1692 | { |
b7d861d9 BK |
1693 | struct pl330_dmac *pl330; |
1694 | unsigned long flags; | |
1695 | ||
1696 | if (!thrd || thrd->free) | |
1697 | return; | |
1698 | ||
1699 | _stop(thrd); | |
1700 | ||
9dc5a315 LPC |
1701 | dma_pl330_rqcb(thrd->req[1 - thrd->lstenq].desc, PL330_ERR_ABORT); |
1702 | dma_pl330_rqcb(thrd->req[thrd->lstenq].desc, PL330_ERR_ABORT); | |
b7d861d9 BK |
1703 | |
1704 | pl330 = thrd->dmac; | |
1705 | ||
1706 | spin_lock_irqsave(&pl330->lock, flags); | |
1707 | _free_event(thrd, thrd->ev); | |
1708 | thrd->free = true; | |
1709 | spin_unlock_irqrestore(&pl330->lock, flags); | |
1710 | } | |
1711 | ||
1712 | /* Initialize the structure for PL330 configuration, that can be used | |
1713 | * by the client driver the make best use of the DMAC | |
1714 | */ | |
f6f2421c | 1715 | static void read_dmac_config(struct pl330_dmac *pl330) |
b7d861d9 | 1716 | { |
f6f2421c | 1717 | void __iomem *regs = pl330->base; |
b7d861d9 BK |
1718 | u32 val; |
1719 | ||
1720 | val = readl(regs + CRD) >> CRD_DATA_WIDTH_SHIFT; | |
1721 | val &= CRD_DATA_WIDTH_MASK; | |
f6f2421c | 1722 | pl330->pcfg.data_bus_width = 8 * (1 << val); |
b7d861d9 BK |
1723 | |
1724 | val = readl(regs + CRD) >> CRD_DATA_BUFF_SHIFT; | |
1725 | val &= CRD_DATA_BUFF_MASK; | |
f6f2421c | 1726 | pl330->pcfg.data_buf_dep = val + 1; |
b7d861d9 BK |
1727 | |
1728 | val = readl(regs + CR0) >> CR0_NUM_CHANS_SHIFT; | |
1729 | val &= CR0_NUM_CHANS_MASK; | |
1730 | val += 1; | |
f6f2421c | 1731 | pl330->pcfg.num_chan = val; |
b7d861d9 BK |
1732 | |
1733 | val = readl(regs + CR0); | |
1734 | if (val & CR0_PERIPH_REQ_SET) { | |
1735 | val = (val >> CR0_NUM_PERIPH_SHIFT) & CR0_NUM_PERIPH_MASK; | |
1736 | val += 1; | |
f6f2421c LPC |
1737 | pl330->pcfg.num_peri = val; |
1738 | pl330->pcfg.peri_ns = readl(regs + CR4); | |
b7d861d9 | 1739 | } else { |
f6f2421c | 1740 | pl330->pcfg.num_peri = 0; |
b7d861d9 BK |
1741 | } |
1742 | ||
1743 | val = readl(regs + CR0); | |
1744 | if (val & CR0_BOOT_MAN_NS) | |
f6f2421c | 1745 | pl330->pcfg.mode |= DMAC_MODE_NS; |
b7d861d9 | 1746 | else |
f6f2421c | 1747 | pl330->pcfg.mode &= ~DMAC_MODE_NS; |
b7d861d9 BK |
1748 | |
1749 | val = readl(regs + CR0) >> CR0_NUM_EVENTS_SHIFT; | |
1750 | val &= CR0_NUM_EVENTS_MASK; | |
1751 | val += 1; | |
f6f2421c | 1752 | pl330->pcfg.num_events = val; |
b7d861d9 | 1753 | |
f6f2421c | 1754 | pl330->pcfg.irq_ns = readl(regs + CR3); |
b7d861d9 BK |
1755 | } |
1756 | ||
1757 | static inline void _reset_thread(struct pl330_thread *thrd) | |
1758 | { | |
1759 | struct pl330_dmac *pl330 = thrd->dmac; | |
b7d861d9 BK |
1760 | |
1761 | thrd->req[0].mc_cpu = pl330->mcode_cpu | |
f6f2421c | 1762 | + (thrd->id * pl330->mcbufsz); |
b7d861d9 | 1763 | thrd->req[0].mc_bus = pl330->mcode_bus |
f6f2421c | 1764 | + (thrd->id * pl330->mcbufsz); |
9dc5a315 | 1765 | thrd->req[0].desc = NULL; |
b7d861d9 BK |
1766 | |
1767 | thrd->req[1].mc_cpu = thrd->req[0].mc_cpu | |
f6f2421c | 1768 | + pl330->mcbufsz / 2; |
b7d861d9 | 1769 | thrd->req[1].mc_bus = thrd->req[0].mc_bus |
f6f2421c | 1770 | + pl330->mcbufsz / 2; |
9dc5a315 | 1771 | thrd->req[1].desc = NULL; |
8ed30a14 LPC |
1772 | |
1773 | thrd->req_running = -1; | |
b7d861d9 BK |
1774 | } |
1775 | ||
1776 | static int dmac_alloc_threads(struct pl330_dmac *pl330) | |
1777 | { | |
f6f2421c | 1778 | int chans = pl330->pcfg.num_chan; |
b7d861d9 BK |
1779 | struct pl330_thread *thrd; |
1780 | int i; | |
1781 | ||
1782 | /* Allocate 1 Manager and 'chans' Channel threads */ | |
1783 | pl330->channels = kzalloc((1 + chans) * sizeof(*thrd), | |
1784 | GFP_KERNEL); | |
1785 | if (!pl330->channels) | |
1786 | return -ENOMEM; | |
1787 | ||
1788 | /* Init Channel threads */ | |
1789 | for (i = 0; i < chans; i++) { | |
1790 | thrd = &pl330->channels[i]; | |
1791 | thrd->id = i; | |
1792 | thrd->dmac = pl330; | |
1793 | _reset_thread(thrd); | |
1794 | thrd->free = true; | |
1795 | } | |
1796 | ||
1797 | /* MANAGER is indexed at the end */ | |
1798 | thrd = &pl330->channels[chans]; | |
1799 | thrd->id = chans; | |
1800 | thrd->dmac = pl330; | |
1801 | thrd->free = false; | |
1802 | pl330->manager = thrd; | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | static int dmac_alloc_resources(struct pl330_dmac *pl330) | |
1808 | { | |
f6f2421c | 1809 | int chans = pl330->pcfg.num_chan; |
b7d861d9 | 1810 | int ret; |
b3040e40 | 1811 | |
b3040e40 | 1812 | /* |
b7d861d9 BK |
1813 | * Alloc MicroCode buffer for 'chans' Channel threads. |
1814 | * A channel's buffer offset is (Channel_Id * MCODE_BUFF_PERCHAN) | |
b3040e40 | 1815 | */ |
f6f2421c LPC |
1816 | pl330->mcode_cpu = dma_alloc_coherent(pl330->ddma.dev, |
1817 | chans * pl330->mcbufsz, | |
b7d861d9 BK |
1818 | &pl330->mcode_bus, GFP_KERNEL); |
1819 | if (!pl330->mcode_cpu) { | |
f6f2421c | 1820 | dev_err(pl330->ddma.dev, "%s:%d Can't allocate memory!\n", |
b7d861d9 BK |
1821 | __func__, __LINE__); |
1822 | return -ENOMEM; | |
1823 | } | |
1824 | ||
1825 | ret = dmac_alloc_threads(pl330); | |
1826 | if (ret) { | |
f6f2421c | 1827 | dev_err(pl330->ddma.dev, "%s:%d Can't to create channels for DMAC!\n", |
b7d861d9 | 1828 | __func__, __LINE__); |
f6f2421c LPC |
1829 | dma_free_coherent(pl330->ddma.dev, |
1830 | chans * pl330->mcbufsz, | |
b7d861d9 BK |
1831 | pl330->mcode_cpu, pl330->mcode_bus); |
1832 | return ret; | |
1833 | } | |
1834 | ||
1835 | return 0; | |
1836 | } | |
1837 | ||
f6f2421c | 1838 | static int pl330_add(struct pl330_dmac *pl330) |
b7d861d9 | 1839 | { |
b7d861d9 BK |
1840 | void __iomem *regs; |
1841 | int i, ret; | |
1842 | ||
f6f2421c | 1843 | regs = pl330->base; |
b3040e40 | 1844 | |
b7d861d9 | 1845 | /* Check if we can handle this DMAC */ |
f6f2421c LPC |
1846 | if ((pl330->pcfg.periph_id & 0xfffff) != PERIPH_ID_VAL) { |
1847 | dev_err(pl330->ddma.dev, "PERIPH_ID 0x%x !\n", | |
1848 | pl330->pcfg.periph_id); | |
b7d861d9 BK |
1849 | return -EINVAL; |
1850 | } | |
b3040e40 | 1851 | |
b7d861d9 | 1852 | /* Read the configuration of the DMAC */ |
f6f2421c | 1853 | read_dmac_config(pl330); |
b3040e40 | 1854 | |
f6f2421c LPC |
1855 | if (pl330->pcfg.num_events == 0) { |
1856 | dev_err(pl330->ddma.dev, "%s:%d Can't work without events!\n", | |
b7d861d9 BK |
1857 | __func__, __LINE__); |
1858 | return -EINVAL; | |
1859 | } | |
b3040e40 | 1860 | |
b7d861d9 | 1861 | spin_lock_init(&pl330->lock); |
1b9bb715 | 1862 | |
b7d861d9 | 1863 | INIT_LIST_HEAD(&pl330->req_done); |
42bc9cf4 | 1864 | |
b7d861d9 | 1865 | /* Use default MC buffer size if not provided */ |
f6f2421c LPC |
1866 | if (!pl330->mcbufsz) |
1867 | pl330->mcbufsz = MCODE_BUFF_PER_REQ * 2; | |
b3040e40 | 1868 | |
b7d861d9 | 1869 | /* Mark all events as free */ |
f6f2421c | 1870 | for (i = 0; i < pl330->pcfg.num_events; i++) |
b7d861d9 | 1871 | pl330->events[i] = -1; |
b3040e40 | 1872 | |
b7d861d9 BK |
1873 | /* Allocate resources needed by the DMAC */ |
1874 | ret = dmac_alloc_resources(pl330); | |
1875 | if (ret) { | |
f6f2421c | 1876 | dev_err(pl330->ddma.dev, "Unable to create channels for DMAC\n"); |
b7d861d9 BK |
1877 | return ret; |
1878 | } | |
b3040e40 | 1879 | |
b7d861d9 | 1880 | tasklet_init(&pl330->tasks, pl330_dotask, (unsigned long) pl330); |
b3040e40 | 1881 | |
b7d861d9 | 1882 | pl330->state = INIT; |
a2f5203f | 1883 | |
b7d861d9 BK |
1884 | return 0; |
1885 | } | |
b3040e40 | 1886 | |
b7d861d9 BK |
1887 | static int dmac_free_threads(struct pl330_dmac *pl330) |
1888 | { | |
b7d861d9 BK |
1889 | struct pl330_thread *thrd; |
1890 | int i; | |
b3040e40 | 1891 | |
b7d861d9 | 1892 | /* Release Channel threads */ |
f6f2421c | 1893 | for (i = 0; i < pl330->pcfg.num_chan; i++) { |
b7d861d9 | 1894 | thrd = &pl330->channels[i]; |
65ad6060 | 1895 | pl330_release_channel(thrd); |
b7d861d9 | 1896 | } |
b3040e40 | 1897 | |
b7d861d9 BK |
1898 | /* Free memory */ |
1899 | kfree(pl330->channels); | |
b3040e40 | 1900 | |
b7d861d9 BK |
1901 | return 0; |
1902 | } | |
b3040e40 | 1903 | |
f6f2421c | 1904 | static void pl330_del(struct pl330_dmac *pl330) |
b7d861d9 | 1905 | { |
b7d861d9 BK |
1906 | pl330->state = UNINIT; |
1907 | ||
1908 | tasklet_kill(&pl330->tasks); | |
1909 | ||
1910 | /* Free DMAC resources */ | |
f6f2421c | 1911 | dmac_free_threads(pl330); |
b7d861d9 | 1912 | |
f6f2421c LPC |
1913 | dma_free_coherent(pl330->ddma.dev, |
1914 | pl330->pcfg.num_chan * pl330->mcbufsz, pl330->mcode_cpu, | |
1915 | pl330->mcode_bus); | |
b7d861d9 | 1916 | } |
b3040e40 | 1917 | |
3e2ec13a TA |
1918 | /* forward declaration */ |
1919 | static struct amba_driver pl330_driver; | |
1920 | ||
b3040e40 JB |
1921 | static inline struct dma_pl330_chan * |
1922 | to_pchan(struct dma_chan *ch) | |
1923 | { | |
1924 | if (!ch) | |
1925 | return NULL; | |
1926 | ||
1927 | return container_of(ch, struct dma_pl330_chan, chan); | |
1928 | } | |
1929 | ||
1930 | static inline struct dma_pl330_desc * | |
1931 | to_desc(struct dma_async_tx_descriptor *tx) | |
1932 | { | |
1933 | return container_of(tx, struct dma_pl330_desc, txd); | |
1934 | } | |
1935 | ||
b3040e40 JB |
1936 | static inline void fill_queue(struct dma_pl330_chan *pch) |
1937 | { | |
1938 | struct dma_pl330_desc *desc; | |
1939 | int ret; | |
1940 | ||
1941 | list_for_each_entry(desc, &pch->work_list, node) { | |
1942 | ||
1943 | /* If already submitted */ | |
1944 | if (desc->status == BUSY) | |
30fb980b | 1945 | continue; |
b3040e40 | 1946 | |
9dc5a315 | 1947 | ret = pl330_submit_req(pch->thread, desc); |
b3040e40 JB |
1948 | if (!ret) { |
1949 | desc->status = BUSY; | |
b3040e40 JB |
1950 | } else if (ret == -EAGAIN) { |
1951 | /* QFull or DMAC Dying */ | |
1952 | break; | |
1953 | } else { | |
1954 | /* Unacceptable request */ | |
1955 | desc->status = DONE; | |
f6f2421c | 1956 | dev_err(pch->dmac->ddma.dev, "%s:%d Bad Desc(%d)\n", |
b3040e40 JB |
1957 | __func__, __LINE__, desc->txd.cookie); |
1958 | tasklet_schedule(&pch->task); | |
1959 | } | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | static void pl330_tasklet(unsigned long data) | |
1964 | { | |
1965 | struct dma_pl330_chan *pch = (struct dma_pl330_chan *)data; | |
1966 | struct dma_pl330_desc *desc, *_dt; | |
1967 | unsigned long flags; | |
b3040e40 JB |
1968 | |
1969 | spin_lock_irqsave(&pch->lock, flags); | |
1970 | ||
1971 | /* Pick up ripe tomatoes */ | |
1972 | list_for_each_entry_safe(desc, _dt, &pch->work_list, node) | |
1973 | if (desc->status == DONE) { | |
30c1dc0f | 1974 | if (!pch->cyclic) |
eab21585 | 1975 | dma_cookie_complete(&desc->txd); |
39ff8613 | 1976 | list_move_tail(&desc->node, &pch->completed_list); |
b3040e40 JB |
1977 | } |
1978 | ||
1979 | /* Try to submit a req imm. next to the last completed cookie */ | |
1980 | fill_queue(pch); | |
1981 | ||
1982 | /* Make sure the PL330 Channel thread is active */ | |
c26939e5 LPC |
1983 | spin_lock(&pch->thread->dmac->lock); |
1984 | _start(pch->thread); | |
1985 | spin_unlock(&pch->thread->dmac->lock); | |
b3040e40 | 1986 | |
39ff8613 LPC |
1987 | while (!list_empty(&pch->completed_list)) { |
1988 | dma_async_tx_callback callback; | |
1989 | void *callback_param; | |
b3040e40 | 1990 | |
39ff8613 LPC |
1991 | desc = list_first_entry(&pch->completed_list, |
1992 | struct dma_pl330_desc, node); | |
1993 | ||
1994 | callback = desc->txd.callback; | |
1995 | callback_param = desc->txd.callback_param; | |
1996 | ||
1997 | if (pch->cyclic) { | |
1998 | desc->status = PREP; | |
1999 | list_move_tail(&desc->node, &pch->work_list); | |
2000 | } else { | |
2001 | desc->status = FREE; | |
2002 | list_move_tail(&desc->node, &pch->dmac->desc_pool); | |
2003 | } | |
2004 | ||
d38a8c62 DW |
2005 | dma_descriptor_unmap(&desc->txd); |
2006 | ||
39ff8613 LPC |
2007 | if (callback) { |
2008 | spin_unlock_irqrestore(&pch->lock, flags); | |
2009 | callback(callback_param); | |
2010 | spin_lock_irqsave(&pch->lock, flags); | |
2011 | } | |
2012 | } | |
2013 | spin_unlock_irqrestore(&pch->lock, flags); | |
b3040e40 JB |
2014 | } |
2015 | ||
3e2ec13a TA |
2016 | bool pl330_filter(struct dma_chan *chan, void *param) |
2017 | { | |
cd072515 | 2018 | u8 *peri_id; |
3e2ec13a TA |
2019 | |
2020 | if (chan->device->dev->driver != &pl330_driver.drv) | |
2021 | return false; | |
2022 | ||
cd072515 | 2023 | peri_id = chan->private; |
2f986ec6 | 2024 | return *peri_id == (unsigned long)param; |
3e2ec13a TA |
2025 | } |
2026 | EXPORT_SYMBOL(pl330_filter); | |
2027 | ||
a80258f9 PV |
2028 | static struct dma_chan *of_dma_pl330_xlate(struct of_phandle_args *dma_spec, |
2029 | struct of_dma *ofdma) | |
2030 | { | |
2031 | int count = dma_spec->args_count; | |
f6f2421c | 2032 | struct pl330_dmac *pl330 = ofdma->of_dma_data; |
70cbb163 | 2033 | unsigned int chan_id; |
a80258f9 | 2034 | |
f6f2421c LPC |
2035 | if (!pl330) |
2036 | return NULL; | |
2037 | ||
a80258f9 PV |
2038 | if (count != 1) |
2039 | return NULL; | |
2040 | ||
70cbb163 | 2041 | chan_id = dma_spec->args[0]; |
f6f2421c | 2042 | if (chan_id >= pl330->num_peripherals) |
70cbb163 | 2043 | return NULL; |
a80258f9 | 2044 | |
f6f2421c | 2045 | return dma_get_slave_channel(&pl330->peripherals[chan_id].chan); |
a80258f9 PV |
2046 | } |
2047 | ||
b3040e40 JB |
2048 | static int pl330_alloc_chan_resources(struct dma_chan *chan) |
2049 | { | |
2050 | struct dma_pl330_chan *pch = to_pchan(chan); | |
f6f2421c | 2051 | struct pl330_dmac *pl330 = pch->dmac; |
b3040e40 JB |
2052 | unsigned long flags; |
2053 | ||
2054 | spin_lock_irqsave(&pch->lock, flags); | |
2055 | ||
d3ee98cd | 2056 | dma_cookie_init(chan); |
42bc9cf4 | 2057 | pch->cyclic = false; |
b3040e40 | 2058 | |
f6f2421c | 2059 | pch->thread = pl330_request_channel(pl330); |
65ad6060 | 2060 | if (!pch->thread) { |
b3040e40 | 2061 | spin_unlock_irqrestore(&pch->lock, flags); |
02747885 | 2062 | return -ENOMEM; |
b3040e40 JB |
2063 | } |
2064 | ||
2065 | tasklet_init(&pch->task, pl330_tasklet, (unsigned long) pch); | |
2066 | ||
2067 | spin_unlock_irqrestore(&pch->lock, flags); | |
2068 | ||
2069 | return 1; | |
2070 | } | |
2071 | ||
2072 | static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg) | |
2073 | { | |
2074 | struct dma_pl330_chan *pch = to_pchan(chan); | |
39ff8613 | 2075 | struct dma_pl330_desc *desc; |
b3040e40 | 2076 | unsigned long flags; |
f6f2421c | 2077 | struct pl330_dmac *pl330 = pch->dmac; |
1d0c1d60 | 2078 | struct dma_slave_config *slave_config; |
ae43b886 | 2079 | LIST_HEAD(list); |
b3040e40 | 2080 | |
1d0c1d60 BK |
2081 | switch (cmd) { |
2082 | case DMA_TERMINATE_ALL: | |
2083 | spin_lock_irqsave(&pch->lock, flags); | |
b3040e40 | 2084 | |
c26939e5 LPC |
2085 | spin_lock(&pl330->lock); |
2086 | _stop(pch->thread); | |
2087 | spin_unlock(&pl330->lock); | |
2088 | ||
2089 | pch->thread->req[0].desc = NULL; | |
2090 | pch->thread->req[1].desc = NULL; | |
2091 | pch->thread->req_running = -1; | |
b3040e40 | 2092 | |
1d0c1d60 | 2093 | /* Mark all desc done */ |
04abf5da LPC |
2094 | list_for_each_entry(desc, &pch->submitted_list, node) { |
2095 | desc->status = FREE; | |
2096 | dma_cookie_complete(&desc->txd); | |
2097 | } | |
2098 | ||
39ff8613 LPC |
2099 | list_for_each_entry(desc, &pch->work_list , node) { |
2100 | desc->status = FREE; | |
2101 | dma_cookie_complete(&desc->txd); | |
2102 | } | |
2103 | ||
2104 | list_for_each_entry(desc, &pch->completed_list , node) { | |
2105 | desc->status = FREE; | |
2106 | dma_cookie_complete(&desc->txd); | |
ae43b886 | 2107 | } |
b3040e40 | 2108 | |
f6f2421c LPC |
2109 | list_splice_tail_init(&pch->submitted_list, &pl330->desc_pool); |
2110 | list_splice_tail_init(&pch->work_list, &pl330->desc_pool); | |
2111 | list_splice_tail_init(&pch->completed_list, &pl330->desc_pool); | |
1d0c1d60 | 2112 | spin_unlock_irqrestore(&pch->lock, flags); |
1d0c1d60 BK |
2113 | break; |
2114 | case DMA_SLAVE_CONFIG: | |
2115 | slave_config = (struct dma_slave_config *)arg; | |
2116 | ||
db8196df | 2117 | if (slave_config->direction == DMA_MEM_TO_DEV) { |
1d0c1d60 BK |
2118 | if (slave_config->dst_addr) |
2119 | pch->fifo_addr = slave_config->dst_addr; | |
2120 | if (slave_config->dst_addr_width) | |
2121 | pch->burst_sz = __ffs(slave_config->dst_addr_width); | |
2122 | if (slave_config->dst_maxburst) | |
2123 | pch->burst_len = slave_config->dst_maxburst; | |
db8196df | 2124 | } else if (slave_config->direction == DMA_DEV_TO_MEM) { |
1d0c1d60 BK |
2125 | if (slave_config->src_addr) |
2126 | pch->fifo_addr = slave_config->src_addr; | |
2127 | if (slave_config->src_addr_width) | |
2128 | pch->burst_sz = __ffs(slave_config->src_addr_width); | |
2129 | if (slave_config->src_maxburst) | |
2130 | pch->burst_len = slave_config->src_maxburst; | |
2131 | } | |
2132 | break; | |
2133 | default: | |
f6f2421c | 2134 | dev_err(pch->dmac->ddma.dev, "Not supported command.\n"); |
1d0c1d60 BK |
2135 | return -ENXIO; |
2136 | } | |
b3040e40 JB |
2137 | |
2138 | return 0; | |
2139 | } | |
2140 | ||
2141 | static void pl330_free_chan_resources(struct dma_chan *chan) | |
2142 | { | |
2143 | struct dma_pl330_chan *pch = to_pchan(chan); | |
2144 | unsigned long flags; | |
2145 | ||
b3040e40 JB |
2146 | tasklet_kill(&pch->task); |
2147 | ||
da331ba8 BZ |
2148 | spin_lock_irqsave(&pch->lock, flags); |
2149 | ||
65ad6060 LPC |
2150 | pl330_release_channel(pch->thread); |
2151 | pch->thread = NULL; | |
b3040e40 | 2152 | |
42bc9cf4 BK |
2153 | if (pch->cyclic) |
2154 | list_splice_tail_init(&pch->work_list, &pch->dmac->desc_pool); | |
2155 | ||
b3040e40 JB |
2156 | spin_unlock_irqrestore(&pch->lock, flags); |
2157 | } | |
2158 | ||
2159 | static enum dma_status | |
2160 | pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie, | |
2161 | struct dma_tx_state *txstate) | |
2162 | { | |
96a2af41 | 2163 | return dma_cookie_status(chan, cookie, txstate); |
b3040e40 JB |
2164 | } |
2165 | ||
2166 | static void pl330_issue_pending(struct dma_chan *chan) | |
2167 | { | |
04abf5da LPC |
2168 | struct dma_pl330_chan *pch = to_pchan(chan); |
2169 | unsigned long flags; | |
2170 | ||
2171 | spin_lock_irqsave(&pch->lock, flags); | |
2172 | list_splice_tail_init(&pch->submitted_list, &pch->work_list); | |
2173 | spin_unlock_irqrestore(&pch->lock, flags); | |
2174 | ||
2175 | pl330_tasklet((unsigned long)pch); | |
b3040e40 JB |
2176 | } |
2177 | ||
2178 | /* | |
2179 | * We returned the last one of the circular list of descriptor(s) | |
2180 | * from prep_xxx, so the argument to submit corresponds to the last | |
2181 | * descriptor of the list. | |
2182 | */ | |
2183 | static dma_cookie_t pl330_tx_submit(struct dma_async_tx_descriptor *tx) | |
2184 | { | |
2185 | struct dma_pl330_desc *desc, *last = to_desc(tx); | |
2186 | struct dma_pl330_chan *pch = to_pchan(tx->chan); | |
2187 | dma_cookie_t cookie; | |
2188 | unsigned long flags; | |
2189 | ||
2190 | spin_lock_irqsave(&pch->lock, flags); | |
2191 | ||
2192 | /* Assign cookies to all nodes */ | |
b3040e40 JB |
2193 | while (!list_empty(&last->node)) { |
2194 | desc = list_entry(last->node.next, struct dma_pl330_desc, node); | |
fc514460 LPC |
2195 | if (pch->cyclic) { |
2196 | desc->txd.callback = last->txd.callback; | |
2197 | desc->txd.callback_param = last->txd.callback_param; | |
2198 | } | |
b3040e40 | 2199 | |
884485e1 | 2200 | dma_cookie_assign(&desc->txd); |
b3040e40 | 2201 | |
04abf5da | 2202 | list_move_tail(&desc->node, &pch->submitted_list); |
b3040e40 JB |
2203 | } |
2204 | ||
884485e1 | 2205 | cookie = dma_cookie_assign(&last->txd); |
04abf5da | 2206 | list_add_tail(&last->node, &pch->submitted_list); |
b3040e40 JB |
2207 | spin_unlock_irqrestore(&pch->lock, flags); |
2208 | ||
2209 | return cookie; | |
2210 | } | |
2211 | ||
2212 | static inline void _init_desc(struct dma_pl330_desc *desc) | |
2213 | { | |
b3040e40 | 2214 | desc->rqcfg.swap = SWAP_NO; |
f0564c7e LPC |
2215 | desc->rqcfg.scctl = CCTRL0; |
2216 | desc->rqcfg.dcctl = CCTRL0; | |
b3040e40 JB |
2217 | desc->txd.tx_submit = pl330_tx_submit; |
2218 | ||
2219 | INIT_LIST_HEAD(&desc->node); | |
2220 | } | |
2221 | ||
2222 | /* Returns the number of descriptors added to the DMAC pool */ | |
f6f2421c | 2223 | static int add_desc(struct pl330_dmac *pl330, gfp_t flg, int count) |
b3040e40 JB |
2224 | { |
2225 | struct dma_pl330_desc *desc; | |
2226 | unsigned long flags; | |
2227 | int i; | |
2228 | ||
0baf8f6a | 2229 | desc = kcalloc(count, sizeof(*desc), flg); |
b3040e40 JB |
2230 | if (!desc) |
2231 | return 0; | |
2232 | ||
f6f2421c | 2233 | spin_lock_irqsave(&pl330->pool_lock, flags); |
b3040e40 JB |
2234 | |
2235 | for (i = 0; i < count; i++) { | |
2236 | _init_desc(&desc[i]); | |
f6f2421c | 2237 | list_add_tail(&desc[i].node, &pl330->desc_pool); |
b3040e40 JB |
2238 | } |
2239 | ||
f6f2421c | 2240 | spin_unlock_irqrestore(&pl330->pool_lock, flags); |
b3040e40 JB |
2241 | |
2242 | return count; | |
2243 | } | |
2244 | ||
f6f2421c | 2245 | static struct dma_pl330_desc *pluck_desc(struct pl330_dmac *pl330) |
b3040e40 JB |
2246 | { |
2247 | struct dma_pl330_desc *desc = NULL; | |
2248 | unsigned long flags; | |
2249 | ||
f6f2421c | 2250 | spin_lock_irqsave(&pl330->pool_lock, flags); |
b3040e40 | 2251 | |
f6f2421c LPC |
2252 | if (!list_empty(&pl330->desc_pool)) { |
2253 | desc = list_entry(pl330->desc_pool.next, | |
b3040e40 JB |
2254 | struct dma_pl330_desc, node); |
2255 | ||
2256 | list_del_init(&desc->node); | |
2257 | ||
2258 | desc->status = PREP; | |
2259 | desc->txd.callback = NULL; | |
2260 | } | |
2261 | ||
f6f2421c | 2262 | spin_unlock_irqrestore(&pl330->pool_lock, flags); |
b3040e40 JB |
2263 | |
2264 | return desc; | |
2265 | } | |
2266 | ||
2267 | static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch) | |
2268 | { | |
f6f2421c | 2269 | struct pl330_dmac *pl330 = pch->dmac; |
cd072515 | 2270 | u8 *peri_id = pch->chan.private; |
b3040e40 JB |
2271 | struct dma_pl330_desc *desc; |
2272 | ||
2273 | /* Pluck one desc from the pool of DMAC */ | |
f6f2421c | 2274 | desc = pluck_desc(pl330); |
b3040e40 JB |
2275 | |
2276 | /* If the DMAC pool is empty, alloc new */ | |
2277 | if (!desc) { | |
f6f2421c | 2278 | if (!add_desc(pl330, GFP_ATOMIC, 1)) |
b3040e40 JB |
2279 | return NULL; |
2280 | ||
2281 | /* Try again */ | |
f6f2421c | 2282 | desc = pluck_desc(pl330); |
b3040e40 | 2283 | if (!desc) { |
f6f2421c | 2284 | dev_err(pch->dmac->ddma.dev, |
b3040e40 JB |
2285 | "%s:%d ALERT!\n", __func__, __LINE__); |
2286 | return NULL; | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | /* Initialize the descriptor */ | |
2291 | desc->pchan = pch; | |
2292 | desc->txd.cookie = 0; | |
2293 | async_tx_ack(&desc->txd); | |
2294 | ||
9dc5a315 | 2295 | desc->peri = peri_id ? pch->chan.chan_id : 0; |
f6f2421c | 2296 | desc->rqcfg.pcfg = &pch->dmac->pcfg; |
b3040e40 JB |
2297 | |
2298 | dma_async_tx_descriptor_init(&desc->txd, &pch->chan); | |
2299 | ||
2300 | return desc; | |
2301 | } | |
2302 | ||
2303 | static inline void fill_px(struct pl330_xfer *px, | |
2304 | dma_addr_t dst, dma_addr_t src, size_t len) | |
2305 | { | |
b3040e40 JB |
2306 | px->bytes = len; |
2307 | px->dst_addr = dst; | |
2308 | px->src_addr = src; | |
2309 | } | |
2310 | ||
2311 | static struct dma_pl330_desc * | |
2312 | __pl330_prep_dma_memcpy(struct dma_pl330_chan *pch, dma_addr_t dst, | |
2313 | dma_addr_t src, size_t len) | |
2314 | { | |
2315 | struct dma_pl330_desc *desc = pl330_get_desc(pch); | |
2316 | ||
2317 | if (!desc) { | |
f6f2421c | 2318 | dev_err(pch->dmac->ddma.dev, "%s:%d Unable to fetch desc\n", |
b3040e40 JB |
2319 | __func__, __LINE__); |
2320 | return NULL; | |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Ideally we should lookout for reqs bigger than | |
2325 | * those that can be programmed with 256 bytes of | |
2326 | * MC buffer, but considering a req size is seldom | |
2327 | * going to be word-unaligned and more than 200MB, | |
2328 | * we take it easy. | |
2329 | * Also, should the limit is reached we'd rather | |
2330 | * have the platform increase MC buffer size than | |
2331 | * complicating this API driver. | |
2332 | */ | |
2333 | fill_px(&desc->px, dst, src, len); | |
2334 | ||
2335 | return desc; | |
2336 | } | |
2337 | ||
2338 | /* Call after fixing burst size */ | |
2339 | static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len) | |
2340 | { | |
2341 | struct dma_pl330_chan *pch = desc->pchan; | |
f6f2421c | 2342 | struct pl330_dmac *pl330 = pch->dmac; |
b3040e40 JB |
2343 | int burst_len; |
2344 | ||
f6f2421c LPC |
2345 | burst_len = pl330->pcfg.data_bus_width / 8; |
2346 | burst_len *= pl330->pcfg.data_buf_dep; | |
b3040e40 JB |
2347 | burst_len >>= desc->rqcfg.brst_size; |
2348 | ||
2349 | /* src/dst_burst_len can't be more than 16 */ | |
2350 | if (burst_len > 16) | |
2351 | burst_len = 16; | |
2352 | ||
2353 | while (burst_len > 1) { | |
2354 | if (!(len % (burst_len << desc->rqcfg.brst_size))) | |
2355 | break; | |
2356 | burst_len--; | |
2357 | } | |
2358 | ||
2359 | return burst_len; | |
2360 | } | |
2361 | ||
42bc9cf4 BK |
2362 | static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( |
2363 | struct dma_chan *chan, dma_addr_t dma_addr, size_t len, | |
185ecb5f | 2364 | size_t period_len, enum dma_transfer_direction direction, |
31c1e5a1 | 2365 | unsigned long flags) |
42bc9cf4 | 2366 | { |
fc514460 | 2367 | struct dma_pl330_desc *desc = NULL, *first = NULL; |
42bc9cf4 | 2368 | struct dma_pl330_chan *pch = to_pchan(chan); |
f6f2421c | 2369 | struct pl330_dmac *pl330 = pch->dmac; |
fc514460 | 2370 | unsigned int i; |
42bc9cf4 BK |
2371 | dma_addr_t dst; |
2372 | dma_addr_t src; | |
2373 | ||
fc514460 | 2374 | if (len % period_len != 0) |
42bc9cf4 | 2375 | return NULL; |
42bc9cf4 | 2376 | |
fc514460 | 2377 | if (!is_slave_direction(direction)) { |
f6f2421c | 2378 | dev_err(pch->dmac->ddma.dev, "%s:%d Invalid dma direction\n", |
42bc9cf4 BK |
2379 | __func__, __LINE__); |
2380 | return NULL; | |
2381 | } | |
2382 | ||
fc514460 LPC |
2383 | for (i = 0; i < len / period_len; i++) { |
2384 | desc = pl330_get_desc(pch); | |
2385 | if (!desc) { | |
f6f2421c | 2386 | dev_err(pch->dmac->ddma.dev, "%s:%d Unable to fetch desc\n", |
fc514460 | 2387 | __func__, __LINE__); |
42bc9cf4 | 2388 | |
fc514460 LPC |
2389 | if (!first) |
2390 | return NULL; | |
2391 | ||
f6f2421c | 2392 | spin_lock_irqsave(&pl330->pool_lock, flags); |
fc514460 LPC |
2393 | |
2394 | while (!list_empty(&first->node)) { | |
2395 | desc = list_entry(first->node.next, | |
2396 | struct dma_pl330_desc, node); | |
f6f2421c | 2397 | list_move_tail(&desc->node, &pl330->desc_pool); |
fc514460 LPC |
2398 | } |
2399 | ||
f6f2421c | 2400 | list_move_tail(&first->node, &pl330->desc_pool); |
fc514460 | 2401 | |
f6f2421c | 2402 | spin_unlock_irqrestore(&pl330->pool_lock, flags); |
42bc9cf4 | 2403 | |
fc514460 LPC |
2404 | return NULL; |
2405 | } | |
2406 | ||
2407 | switch (direction) { | |
2408 | case DMA_MEM_TO_DEV: | |
2409 | desc->rqcfg.src_inc = 1; | |
2410 | desc->rqcfg.dst_inc = 0; | |
fc514460 LPC |
2411 | src = dma_addr; |
2412 | dst = pch->fifo_addr; | |
2413 | break; | |
2414 | case DMA_DEV_TO_MEM: | |
2415 | desc->rqcfg.src_inc = 0; | |
2416 | desc->rqcfg.dst_inc = 1; | |
fc514460 LPC |
2417 | src = pch->fifo_addr; |
2418 | dst = dma_addr; | |
2419 | break; | |
2420 | default: | |
2421 | break; | |
2422 | } | |
2423 | ||
9dc5a315 | 2424 | desc->rqtype = direction; |
fc514460 LPC |
2425 | desc->rqcfg.brst_size = pch->burst_sz; |
2426 | desc->rqcfg.brst_len = 1; | |
2427 | fill_px(&desc->px, dst, src, period_len); | |
2428 | ||
2429 | if (!first) | |
2430 | first = desc; | |
2431 | else | |
2432 | list_add_tail(&desc->node, &first->node); | |
2433 | ||
2434 | dma_addr += period_len; | |
2435 | } | |
2436 | ||
2437 | if (!desc) | |
2438 | return NULL; | |
2439 | ||
2440 | pch->cyclic = true; | |
2441 | desc->txd.flags = flags; | |
42bc9cf4 BK |
2442 | |
2443 | return &desc->txd; | |
2444 | } | |
2445 | ||
b3040e40 JB |
2446 | static struct dma_async_tx_descriptor * |
2447 | pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst, | |
2448 | dma_addr_t src, size_t len, unsigned long flags) | |
2449 | { | |
2450 | struct dma_pl330_desc *desc; | |
2451 | struct dma_pl330_chan *pch = to_pchan(chan); | |
f6f2421c | 2452 | struct pl330_dmac *pl330 = pch->dmac; |
b3040e40 JB |
2453 | int burst; |
2454 | ||
4e0e6109 | 2455 | if (unlikely(!pch || !len)) |
b3040e40 JB |
2456 | return NULL; |
2457 | ||
b3040e40 JB |
2458 | desc = __pl330_prep_dma_memcpy(pch, dst, src, len); |
2459 | if (!desc) | |
2460 | return NULL; | |
2461 | ||
2462 | desc->rqcfg.src_inc = 1; | |
2463 | desc->rqcfg.dst_inc = 1; | |
9dc5a315 | 2464 | desc->rqtype = DMA_MEM_TO_MEM; |
b3040e40 JB |
2465 | |
2466 | /* Select max possible burst size */ | |
f6f2421c | 2467 | burst = pl330->pcfg.data_bus_width / 8; |
b3040e40 JB |
2468 | |
2469 | while (burst > 1) { | |
2470 | if (!(len % burst)) | |
2471 | break; | |
2472 | burst /= 2; | |
2473 | } | |
2474 | ||
2475 | desc->rqcfg.brst_size = 0; | |
2476 | while (burst != (1 << desc->rqcfg.brst_size)) | |
2477 | desc->rqcfg.brst_size++; | |
2478 | ||
2479 | desc->rqcfg.brst_len = get_burst_len(desc, len); | |
2480 | ||
2481 | desc->txd.flags = flags; | |
2482 | ||
2483 | return &desc->txd; | |
2484 | } | |
2485 | ||
f6f2421c | 2486 | static void __pl330_giveback_desc(struct pl330_dmac *pl330, |
52a9d179 CP |
2487 | struct dma_pl330_desc *first) |
2488 | { | |
2489 | unsigned long flags; | |
2490 | struct dma_pl330_desc *desc; | |
2491 | ||
2492 | if (!first) | |
2493 | return; | |
2494 | ||
f6f2421c | 2495 | spin_lock_irqsave(&pl330->pool_lock, flags); |
52a9d179 CP |
2496 | |
2497 | while (!list_empty(&first->node)) { | |
2498 | desc = list_entry(first->node.next, | |
2499 | struct dma_pl330_desc, node); | |
f6f2421c | 2500 | list_move_tail(&desc->node, &pl330->desc_pool); |
52a9d179 CP |
2501 | } |
2502 | ||
f6f2421c | 2503 | list_move_tail(&first->node, &pl330->desc_pool); |
52a9d179 | 2504 | |
f6f2421c | 2505 | spin_unlock_irqrestore(&pl330->pool_lock, flags); |
52a9d179 CP |
2506 | } |
2507 | ||
b3040e40 JB |
2508 | static struct dma_async_tx_descriptor * |
2509 | pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | |
db8196df | 2510 | unsigned int sg_len, enum dma_transfer_direction direction, |
185ecb5f | 2511 | unsigned long flg, void *context) |
b3040e40 JB |
2512 | { |
2513 | struct dma_pl330_desc *first, *desc = NULL; | |
2514 | struct dma_pl330_chan *pch = to_pchan(chan); | |
b3040e40 | 2515 | struct scatterlist *sg; |
1b9bb715 | 2516 | int i; |
b3040e40 JB |
2517 | dma_addr_t addr; |
2518 | ||
cd072515 | 2519 | if (unlikely(!pch || !sgl || !sg_len)) |
b3040e40 JB |
2520 | return NULL; |
2521 | ||
1b9bb715 | 2522 | addr = pch->fifo_addr; |
b3040e40 JB |
2523 | |
2524 | first = NULL; | |
2525 | ||
2526 | for_each_sg(sgl, sg, sg_len, i) { | |
2527 | ||
2528 | desc = pl330_get_desc(pch); | |
2529 | if (!desc) { | |
f6f2421c | 2530 | struct pl330_dmac *pl330 = pch->dmac; |
b3040e40 | 2531 | |
f6f2421c | 2532 | dev_err(pch->dmac->ddma.dev, |
b3040e40 JB |
2533 | "%s:%d Unable to fetch desc\n", |
2534 | __func__, __LINE__); | |
f6f2421c | 2535 | __pl330_giveback_desc(pl330, first); |
b3040e40 JB |
2536 | |
2537 | return NULL; | |
2538 | } | |
2539 | ||
2540 | if (!first) | |
2541 | first = desc; | |
2542 | else | |
2543 | list_add_tail(&desc->node, &first->node); | |
2544 | ||
db8196df | 2545 | if (direction == DMA_MEM_TO_DEV) { |
b3040e40 JB |
2546 | desc->rqcfg.src_inc = 1; |
2547 | desc->rqcfg.dst_inc = 0; | |
2548 | fill_px(&desc->px, | |
2549 | addr, sg_dma_address(sg), sg_dma_len(sg)); | |
2550 | } else { | |
2551 | desc->rqcfg.src_inc = 0; | |
2552 | desc->rqcfg.dst_inc = 1; | |
2553 | fill_px(&desc->px, | |
2554 | sg_dma_address(sg), addr, sg_dma_len(sg)); | |
2555 | } | |
2556 | ||
1b9bb715 | 2557 | desc->rqcfg.brst_size = pch->burst_sz; |
b3040e40 | 2558 | desc->rqcfg.brst_len = 1; |
9dc5a315 | 2559 | desc->rqtype = direction; |
b3040e40 JB |
2560 | } |
2561 | ||
2562 | /* Return the last desc in the chain */ | |
2563 | desc->txd.flags = flg; | |
2564 | return &desc->txd; | |
2565 | } | |
2566 | ||
2567 | static irqreturn_t pl330_irq_handler(int irq, void *data) | |
2568 | { | |
2569 | if (pl330_update(data)) | |
2570 | return IRQ_HANDLED; | |
2571 | else | |
2572 | return IRQ_NONE; | |
2573 | } | |
2574 | ||
ca38ff13 LPC |
2575 | #define PL330_DMA_BUSWIDTHS \ |
2576 | BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) | \ | |
2577 | BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ | |
2578 | BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ | |
2579 | BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \ | |
2580 | BIT(DMA_SLAVE_BUSWIDTH_8_BYTES) | |
2581 | ||
2582 | static int pl330_dma_device_slave_caps(struct dma_chan *dchan, | |
2583 | struct dma_slave_caps *caps) | |
2584 | { | |
2585 | caps->src_addr_widths = PL330_DMA_BUSWIDTHS; | |
2586 | caps->dstn_addr_widths = PL330_DMA_BUSWIDTHS; | |
2587 | caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); | |
2588 | caps->cmd_pause = false; | |
2589 | caps->cmd_terminate = true; | |
bfb9bb42 | 2590 | caps->residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR; |
ca38ff13 | 2591 | |
ca38ff13 LPC |
2592 | return 0; |
2593 | } | |
2594 | ||
463a1f8b | 2595 | static int |
aa25afad | 2596 | pl330_probe(struct amba_device *adev, const struct amba_id *id) |
b3040e40 JB |
2597 | { |
2598 | struct dma_pl330_platdata *pdat; | |
f6f2421c LPC |
2599 | struct pl330_config *pcfg; |
2600 | struct pl330_dmac *pl330; | |
0b94c577 | 2601 | struct dma_pl330_chan *pch, *_p; |
b3040e40 JB |
2602 | struct dma_device *pd; |
2603 | struct resource *res; | |
2604 | int i, ret, irq; | |
4e0e6109 | 2605 | int num_chan; |
b3040e40 | 2606 | |
d4adcc01 | 2607 | pdat = dev_get_platdata(&adev->dev); |
b3040e40 | 2608 | |
64113016 RK |
2609 | ret = dma_set_mask_and_coherent(&adev->dev, DMA_BIT_MASK(32)); |
2610 | if (ret) | |
2611 | return ret; | |
2612 | ||
b3040e40 | 2613 | /* Allocate a new DMAC and its Channels */ |
f6f2421c LPC |
2614 | pl330 = devm_kzalloc(&adev->dev, sizeof(*pl330), GFP_KERNEL); |
2615 | if (!pl330) { | |
b3040e40 JB |
2616 | dev_err(&adev->dev, "unable to allocate mem\n"); |
2617 | return -ENOMEM; | |
2618 | } | |
2619 | ||
f6f2421c | 2620 | pl330->mcbufsz = pdat ? pdat->mcbuf_sz : 0; |
b3040e40 JB |
2621 | |
2622 | res = &adev->res; | |
f6f2421c LPC |
2623 | pl330->base = devm_ioremap_resource(&adev->dev, res); |
2624 | if (IS_ERR(pl330->base)) | |
2625 | return PTR_ERR(pl330->base); | |
b3040e40 | 2626 | |
f6f2421c | 2627 | amba_set_drvdata(adev, pl330); |
a2f5203f | 2628 | |
02808b42 | 2629 | for (i = 0; i < AMBA_NR_IRQS; i++) { |
e98b3caf MS |
2630 | irq = adev->irq[i]; |
2631 | if (irq) { | |
2632 | ret = devm_request_irq(&adev->dev, irq, | |
2633 | pl330_irq_handler, 0, | |
f6f2421c | 2634 | dev_name(&adev->dev), pl330); |
e98b3caf MS |
2635 | if (ret) |
2636 | return ret; | |
2637 | } else { | |
2638 | break; | |
2639 | } | |
2640 | } | |
b3040e40 | 2641 | |
f6f2421c LPC |
2642 | pcfg = &pl330->pcfg; |
2643 | ||
2644 | pcfg->periph_id = adev->periphid; | |
2645 | ret = pl330_add(pl330); | |
b3040e40 | 2646 | if (ret) |
173e838c | 2647 | return ret; |
b3040e40 | 2648 | |
f6f2421c LPC |
2649 | INIT_LIST_HEAD(&pl330->desc_pool); |
2650 | spin_lock_init(&pl330->pool_lock); | |
b3040e40 JB |
2651 | |
2652 | /* Create a descriptor pool of default size */ | |
f6f2421c | 2653 | if (!add_desc(pl330, GFP_KERNEL, NR_DEFAULT_DESC)) |
b3040e40 JB |
2654 | dev_warn(&adev->dev, "unable to allocate desc\n"); |
2655 | ||
f6f2421c | 2656 | pd = &pl330->ddma; |
b3040e40 JB |
2657 | INIT_LIST_HEAD(&pd->channels); |
2658 | ||
2659 | /* Initialize channel parameters */ | |
c8473828 | 2660 | if (pdat) |
f6f2421c | 2661 | num_chan = max_t(int, pdat->nr_valid_peri, pcfg->num_chan); |
c8473828 | 2662 | else |
f6f2421c | 2663 | num_chan = max_t(int, pcfg->num_peri, pcfg->num_chan); |
c8473828 | 2664 | |
f6f2421c | 2665 | pl330->num_peripherals = num_chan; |
70cbb163 | 2666 | |
f6f2421c LPC |
2667 | pl330->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL); |
2668 | if (!pl330->peripherals) { | |
61c6e753 | 2669 | ret = -ENOMEM; |
f6f2421c | 2670 | dev_err(&adev->dev, "unable to allocate pl330->peripherals\n"); |
e4d43c17 | 2671 | goto probe_err2; |
61c6e753 | 2672 | } |
b3040e40 | 2673 | |
4e0e6109 | 2674 | for (i = 0; i < num_chan; i++) { |
f6f2421c | 2675 | pch = &pl330->peripherals[i]; |
93ed5544 TA |
2676 | if (!adev->dev.of_node) |
2677 | pch->chan.private = pdat ? &pdat->peri_id[i] : NULL; | |
2678 | else | |
2679 | pch->chan.private = adev->dev.of_node; | |
b3040e40 | 2680 | |
04abf5da | 2681 | INIT_LIST_HEAD(&pch->submitted_list); |
b3040e40 | 2682 | INIT_LIST_HEAD(&pch->work_list); |
39ff8613 | 2683 | INIT_LIST_HEAD(&pch->completed_list); |
b3040e40 | 2684 | spin_lock_init(&pch->lock); |
65ad6060 | 2685 | pch->thread = NULL; |
b3040e40 | 2686 | pch->chan.device = pd; |
f6f2421c | 2687 | pch->dmac = pl330; |
b3040e40 JB |
2688 | |
2689 | /* Add the channel to the DMAC list */ | |
b3040e40 JB |
2690 | list_add_tail(&pch->chan.device_node, &pd->channels); |
2691 | } | |
2692 | ||
2693 | pd->dev = &adev->dev; | |
93ed5544 | 2694 | if (pdat) { |
cd072515 | 2695 | pd->cap_mask = pdat->cap_mask; |
93ed5544 | 2696 | } else { |
cd072515 | 2697 | dma_cap_set(DMA_MEMCPY, pd->cap_mask); |
f6f2421c | 2698 | if (pcfg->num_peri) { |
93ed5544 TA |
2699 | dma_cap_set(DMA_SLAVE, pd->cap_mask); |
2700 | dma_cap_set(DMA_CYCLIC, pd->cap_mask); | |
5557a419 | 2701 | dma_cap_set(DMA_PRIVATE, pd->cap_mask); |
93ed5544 TA |
2702 | } |
2703 | } | |
b3040e40 JB |
2704 | |
2705 | pd->device_alloc_chan_resources = pl330_alloc_chan_resources; | |
2706 | pd->device_free_chan_resources = pl330_free_chan_resources; | |
2707 | pd->device_prep_dma_memcpy = pl330_prep_dma_memcpy; | |
42bc9cf4 | 2708 | pd->device_prep_dma_cyclic = pl330_prep_dma_cyclic; |
b3040e40 JB |
2709 | pd->device_tx_status = pl330_tx_status; |
2710 | pd->device_prep_slave_sg = pl330_prep_slave_sg; | |
2711 | pd->device_control = pl330_control; | |
2712 | pd->device_issue_pending = pl330_issue_pending; | |
ca38ff13 | 2713 | pd->device_slave_caps = pl330_dma_device_slave_caps; |
b3040e40 JB |
2714 | |
2715 | ret = dma_async_device_register(pd); | |
2716 | if (ret) { | |
2717 | dev_err(&adev->dev, "unable to register DMAC\n"); | |
0b94c577 PV |
2718 | goto probe_err3; |
2719 | } | |
2720 | ||
2721 | if (adev->dev.of_node) { | |
2722 | ret = of_dma_controller_register(adev->dev.of_node, | |
f6f2421c | 2723 | of_dma_pl330_xlate, pl330); |
0b94c577 PV |
2724 | if (ret) { |
2725 | dev_err(&adev->dev, | |
2726 | "unable to register DMA to the generic DT DMA helpers\n"); | |
2727 | } | |
b3040e40 | 2728 | } |
b714b84e | 2729 | |
f6f2421c | 2730 | adev->dev.dma_parms = &pl330->dma_parms; |
b714b84e | 2731 | |
dbaf6d85 VK |
2732 | /* |
2733 | * This is the limit for transfers with a buswidth of 1, larger | |
2734 | * buswidths will have larger limits. | |
2735 | */ | |
2736 | ret = dma_set_max_seg_size(&adev->dev, 1900800); | |
2737 | if (ret) | |
2738 | dev_err(&adev->dev, "unable to set the seg size\n"); | |
2739 | ||
b3040e40 | 2740 | |
b3040e40 JB |
2741 | dev_info(&adev->dev, |
2742 | "Loaded driver for PL330 DMAC-%d\n", adev->periphid); | |
2743 | dev_info(&adev->dev, | |
2744 | "\tDBUFF-%ux%ubytes Num_Chans-%u Num_Peri-%u Num_Events-%u\n", | |
f6f2421c LPC |
2745 | pcfg->data_buf_dep, pcfg->data_bus_width / 8, pcfg->num_chan, |
2746 | pcfg->num_peri, pcfg->num_events); | |
b3040e40 JB |
2747 | |
2748 | return 0; | |
0b94c577 | 2749 | probe_err3: |
0b94c577 | 2750 | /* Idle the DMAC */ |
f6f2421c | 2751 | list_for_each_entry_safe(pch, _p, &pl330->ddma.channels, |
0b94c577 PV |
2752 | chan.device_node) { |
2753 | ||
2754 | /* Remove the channel */ | |
2755 | list_del(&pch->chan.device_node); | |
2756 | ||
2757 | /* Flush the channel */ | |
2758 | pl330_control(&pch->chan, DMA_TERMINATE_ALL, 0); | |
2759 | pl330_free_chan_resources(&pch->chan); | |
2760 | } | |
b3040e40 | 2761 | probe_err2: |
f6f2421c | 2762 | pl330_del(pl330); |
b3040e40 JB |
2763 | |
2764 | return ret; | |
2765 | } | |
2766 | ||
4bf27b8b | 2767 | static int pl330_remove(struct amba_device *adev) |
b3040e40 | 2768 | { |
f6f2421c | 2769 | struct pl330_dmac *pl330 = amba_get_drvdata(adev); |
b3040e40 | 2770 | struct dma_pl330_chan *pch, *_p; |
b3040e40 | 2771 | |
0b94c577 PV |
2772 | if (adev->dev.of_node) |
2773 | of_dma_controller_free(adev->dev.of_node); | |
421da89a | 2774 | |
f6f2421c | 2775 | dma_async_device_unregister(&pl330->ddma); |
b3040e40 JB |
2776 | |
2777 | /* Idle the DMAC */ | |
f6f2421c | 2778 | list_for_each_entry_safe(pch, _p, &pl330->ddma.channels, |
b3040e40 JB |
2779 | chan.device_node) { |
2780 | ||
2781 | /* Remove the channel */ | |
2782 | list_del(&pch->chan.device_node); | |
2783 | ||
2784 | /* Flush the channel */ | |
2785 | pl330_control(&pch->chan, DMA_TERMINATE_ALL, 0); | |
2786 | pl330_free_chan_resources(&pch->chan); | |
2787 | } | |
2788 | ||
f6f2421c | 2789 | pl330_del(pl330); |
b3040e40 | 2790 | |
b3040e40 JB |
2791 | return 0; |
2792 | } | |
2793 | ||
2794 | static struct amba_id pl330_ids[] = { | |
2795 | { | |
2796 | .id = 0x00041330, | |
2797 | .mask = 0x000fffff, | |
2798 | }, | |
2799 | { 0, 0 }, | |
2800 | }; | |
2801 | ||
e8fa516a DM |
2802 | MODULE_DEVICE_TABLE(amba, pl330_ids); |
2803 | ||
b3040e40 JB |
2804 | static struct amba_driver pl330_driver = { |
2805 | .drv = { | |
2806 | .owner = THIS_MODULE, | |
2807 | .name = "dma-pl330", | |
2808 | }, | |
2809 | .id_table = pl330_ids, | |
2810 | .probe = pl330_probe, | |
2811 | .remove = pl330_remove, | |
2812 | }; | |
2813 | ||
9e5ed094 | 2814 | module_amba_driver(pl330_driver); |
b3040e40 JB |
2815 | |
2816 | MODULE_AUTHOR("Jaswinder Singh <jassi.brar@samsung.com>"); | |
2817 | MODULE_DESCRIPTION("API Driver for PL330 DMAC"); | |
2818 | MODULE_LICENSE("GPL"); |