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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20160614-2' into...
[qemu.git] / hw / dma / xlnx_dpdma.c
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d3c6369a
FK		 1/*
2 * xlnx_dpdma.c
3 *
4 * Copyright (C) 2015 : GreenSocs Ltd
5 * http://www.greensocs.com/ , email: [email protected]
6 *
7 * Developed by :
8 * Frederic Konrad <[email protected]>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, see <http://www.gnu.org/licenses/>.
22 *
23 */
24
25#include "qemu/osdep.h"
26#include "qemu/log.h"
27#include "hw/dma/xlnx_dpdma.h"
28
29#ifndef DEBUG_DPDMA
30#define DEBUG_DPDMA 0
31#endif
32
33#define DPRINTF(fmt, ...) do { \
34 if (DEBUG_DPDMA) { \
35 qemu_log("xlnx_dpdma: " fmt , ## __VA_ARGS__); \
36 } \
37} while (0);
38
39/*
40 * Registers offset for DPDMA.
41 */
42#define DPDMA_ERR_CTRL (0x0000)
43#define DPDMA_ISR (0x0004 >> 2)
44#define DPDMA_IMR (0x0008 >> 2)
45#define DPDMA_IEN (0x000C >> 2)
46#define DPDMA_IDS (0x0010 >> 2)
47#define DPDMA_EISR (0x0014 >> 2)
48#define DPDMA_EIMR (0x0018 >> 2)
49#define DPDMA_EIEN (0x001C >> 2)
50#define DPDMA_EIDS (0x0020 >> 2)
51#define DPDMA_CNTL (0x0100 >> 2)
52
53#define DPDMA_GBL (0x0104 >> 2)
54#define DPDMA_GBL_TRG_CH(n) (1 << n)
55#define DPDMA_GBL_RTRG_CH(n) (1 << 6 << n)
56
57#define DPDMA_ALC0_CNTL (0x0108 >> 2)
58#define DPDMA_ALC0_STATUS (0x010C >> 2)
59#define DPDMA_ALC0_MAX (0x0110 >> 2)
60#define DPDMA_ALC0_MIN (0x0114 >> 2)
61#define DPDMA_ALC0_ACC (0x0118 >> 2)
62#define DPDMA_ALC0_ACC_TRAN (0x011C >> 2)
63#define DPDMA_ALC1_CNTL (0x0120 >> 2)
64#define DPDMA_ALC1_STATUS (0x0124 >> 2)
65#define DPDMA_ALC1_MAX (0x0128 >> 2)
66#define DPDMA_ALC1_MIN (0x012C >> 2)
67#define DPDMA_ALC1_ACC (0x0130 >> 2)
68#define DPDMA_ALC1_ACC_TRAN (0x0134 >> 2)
69
70#define DPDMA_DSCR_STRT_ADDRE_CH(n) ((0x0200 + n * 0x100) >> 2)
71#define DPDMA_DSCR_STRT_ADDR_CH(n) ((0x0204 + n * 0x100) >> 2)
72#define DPDMA_DSCR_NEXT_ADDRE_CH(n) ((0x0208 + n * 0x100) >> 2)
73#define DPDMA_DSCR_NEXT_ADDR_CH(n) ((0x020C + n * 0x100) >> 2)
74#define DPDMA_PYLD_CUR_ADDRE_CH(n) ((0x0210 + n * 0x100) >> 2)
75#define DPDMA_PYLD_CUR_ADDR_CH(n) ((0x0214 + n * 0x100) >> 2)
76
77#define DPDMA_CNTL_CH(n) ((0x0218 + n * 0x100) >> 2)
78#define DPDMA_CNTL_CH_EN (1)
79#define DPDMA_CNTL_CH_PAUSED (1 << 1)
80
81#define DPDMA_STATUS_CH(n) ((0x021C + n * 0x100) >> 2)
82#define DPDMA_STATUS_BURST_TYPE (1 << 4)
83#define DPDMA_STATUS_MODE (1 << 5)
84#define DPDMA_STATUS_EN_CRC (1 << 6)
85#define DPDMA_STATUS_LAST_DSCR (1 << 7)
86#define DPDMA_STATUS_LDSCR_FRAME (1 << 8)
87#define DPDMA_STATUS_IGNR_DONE (1 << 9)
88#define DPDMA_STATUS_DSCR_DONE (1 << 10)
89#define DPDMA_STATUS_EN_DSCR_UP (1 << 11)
90#define DPDMA_STATUS_EN_DSCR_INTR (1 << 12)
91#define DPDMA_STATUS_PREAMBLE_OFF (13)
92
93#define DPDMA_VDO_CH(n) ((0x0220 + n * 0x100) >> 2)
94#define DPDMA_PYLD_SZ_CH(n) ((0x0224 + n * 0x100) >> 2)
95#define DPDMA_DSCR_ID_CH(n) ((0x0228 + n * 0x100) >> 2)
96
97/*
98 * Descriptor control field.
99 */
100#define CONTROL_PREAMBLE_VALUE 0xA5
101
102#define DSCR_CTRL_PREAMBLE 0xFF
103#define DSCR_CTRL_EN_DSCR_DONE_INTR (1 << 8)
104#define DSCR_CTRL_EN_DSCR_UPDATE (1 << 9)
105#define DSCR_CTRL_IGNORE_DONE (1 << 10)
106#define DSCR_CTRL_AXI_BURST_TYPE (1 << 11)
107#define DSCR_CTRL_AXCACHE (0x0F << 12)
108#define DSCR_CTRL_AXPROT (0x2 << 16)
109#define DSCR_CTRL_DESCRIPTOR_MODE (1 << 18)
110#define DSCR_CTRL_LAST_DESCRIPTOR (1 << 19)
111#define DSCR_CTRL_ENABLE_CRC (1 << 20)
112#define DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME (1 << 21)
113
114/*
115 * Descriptor timestamp field.
116 */
117#define STATUS_DONE (1 << 31)
118
119#define DPDMA_FRAG_MAX_SZ (4096)
120
121enum DPDMABurstType {
122 DPDMA_INCR = 0,
123 DPDMA_FIXED = 1
124};
125
126enum DPDMAMode {
127 DPDMA_CONTIGOUS = 0,
128 DPDMA_FRAGMENTED = 1
129};
130
131struct DPDMADescriptor {
132 uint32_t control;
133 uint32_t descriptor_id;
134 /* transfer size in byte. */
135 uint32_t xfer_size;
136 uint32_t line_size_stride;
137 uint32_t timestamp_lsb;
138 uint32_t timestamp_msb;
139 /* contains extension for both descriptor and source. */
140 uint32_t address_extension;
141 uint32_t next_descriptor;
142 uint32_t source_address;
143 uint32_t address_extension_23;
144 uint32_t address_extension_45;
145 uint32_t source_address2;
146 uint32_t source_address3;
147 uint32_t source_address4;
148 uint32_t source_address5;
149 uint32_t crc;
150};
151
152typedef enum DPDMABurstType DPDMABurstType;
153typedef enum DPDMAMode DPDMAMode;
154typedef struct DPDMADescriptor DPDMADescriptor;
155
156static bool xlnx_dpdma_desc_is_last(DPDMADescriptor *desc)
157{
158 return ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR) != 0);
159}
160
161static bool xlnx_dpdma_desc_is_last_of_frame(DPDMADescriptor *desc)
162{
163 return ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME) != 0);
164}
165
166static uint64_t xlnx_dpdma_desc_get_source_address(DPDMADescriptor *desc,
167 uint8_t frag)
168{
169 uint64_t addr = 0;
170 assert(frag < 5);
171
172 switch (frag) {
173 case 0:
174 addr = desc->source_address
175 + (extract32(desc->address_extension, 16, 12) << 20);
176 break;
177 case 1:
178 addr = desc->source_address2
179 + (extract32(desc->address_extension_23, 0, 12) << 8);
180 break;
181 case 2:
182 addr = desc->source_address3
183 + (extract32(desc->address_extension_23, 16, 12) << 20);
184 break;
185 case 3:
186 addr = desc->source_address4
187 + (extract32(desc->address_extension_45, 0, 12) << 8);
188 break;
189 case 4:
190 addr = desc->source_address5
191 + (extract32(desc->address_extension_45, 16, 12) << 20);
192 break;
193 default:
194 addr = 0;
195 break;
196 }
197
198 return addr;
199}
200
201static uint32_t xlnx_dpdma_desc_get_transfer_size(DPDMADescriptor *desc)
202{
203 return desc->xfer_size;
204}
205
206static uint32_t xlnx_dpdma_desc_get_line_size(DPDMADescriptor *desc)
207{
208 return extract32(desc->line_size_stride, 0, 18);
209}
210
211static uint32_t xlnx_dpdma_desc_get_line_stride(DPDMADescriptor *desc)
212{
213 return extract32(desc->line_size_stride, 18, 14) * 16;
214}
215
216static inline bool xlnx_dpdma_desc_crc_enabled(DPDMADescriptor *desc)
217{
218 return (desc->control & DSCR_CTRL_ENABLE_CRC) != 0;
219}
220
221static inline bool xlnx_dpdma_desc_check_crc(DPDMADescriptor *desc)
222{
223 uint32_t *p = (uint32_t *)desc;
224 uint32_t crc = 0;
225 uint8_t i;
226
227 /*
228 * CRC is calculated on the whole descriptor except the last 32bits word
229 * using 32bits addition.
230 */
231 for (i = 0; i < 15; i++) {
232 crc += p[i];
233 }
234
235 return crc == desc->crc;
236}
237
238static inline bool xlnx_dpdma_desc_completion_interrupt(DPDMADescriptor *desc)
239{
240 return (desc->control & DSCR_CTRL_EN_DSCR_DONE_INTR) != 0;
241}
242
243static inline bool xlnx_dpdma_desc_is_valid(DPDMADescriptor *desc)
244{
245 return (desc->control & DSCR_CTRL_PREAMBLE) == CONTROL_PREAMBLE_VALUE;
246}
247
248static inline bool xlnx_dpdma_desc_is_contiguous(DPDMADescriptor *desc)
249{
250 return (desc->control & DSCR_CTRL_DESCRIPTOR_MODE) == 0;
251}
252
253static inline bool xlnx_dpdma_desc_update_enabled(DPDMADescriptor *desc)
254{
255 return (desc->control & DSCR_CTRL_EN_DSCR_UPDATE) != 0;
256}
257
258static inline void xlnx_dpdma_desc_set_done(DPDMADescriptor *desc)
259{
260 desc->timestamp_msb |= STATUS_DONE;
261}
262
263static inline bool xlnx_dpdma_desc_is_already_done(DPDMADescriptor *desc)
264{
265 return (desc->timestamp_msb & STATUS_DONE) != 0;
266}
267
268static inline bool xlnx_dpdma_desc_ignore_done_bit(DPDMADescriptor *desc)
269{
270 return (desc->control & DSCR_CTRL_IGNORE_DONE) != 0;
271}
272
273static const VMStateDescription vmstate_xlnx_dpdma = {
274 .name = TYPE_XLNX_DPDMA,
275 .version_id = 1,
276 .fields = (VMStateField[]) {
277 VMSTATE_UINT32_ARRAY(registers, XlnxDPDMAState,
278 XLNX_DPDMA_REG_ARRAY_SIZE),
279 VMSTATE_BOOL_ARRAY(operation_finished, XlnxDPDMAState, 6),
280 VMSTATE_END_OF_LIST()
281 }
282};
283
284static void xlnx_dpdma_update_irq(XlnxDPDMAState *s)
285{
286 bool flags;
287
288 flags = ((s->registers[DPDMA_ISR] & (~s->registers[DPDMA_IMR]))
289 || (s->registers[DPDMA_EISR] & (~s->registers[DPDMA_EIMR])));
290 qemu_set_irq(s->irq, flags);
291}
292
293static uint64_t xlnx_dpdma_descriptor_start_address(XlnxDPDMAState *s,
294 uint8_t channel)
295{
296 return (s->registers[DPDMA_DSCR_STRT_ADDRE_CH(channel)] << 16)
297 + s->registers[DPDMA_DSCR_STRT_ADDR_CH(channel)];
298}
299
300static uint64_t xlnx_dpdma_descriptor_next_address(XlnxDPDMAState *s,
301 uint8_t channel)
302{
303 return ((uint64_t)s->registers[DPDMA_DSCR_NEXT_ADDRE_CH(channel)] << 32)
304 + s->registers[DPDMA_DSCR_NEXT_ADDR_CH(channel)];
305}
306
307static bool xlnx_dpdma_is_channel_enabled(XlnxDPDMAState *s,
308 uint8_t channel)
309{
310 return (s->registers[DPDMA_CNTL_CH(channel)] & DPDMA_CNTL_CH_EN) != 0;
311}
312
313static bool xlnx_dpdma_is_channel_paused(XlnxDPDMAState *s,
314 uint8_t channel)
315{
316 return (s->registers[DPDMA_CNTL_CH(channel)] & DPDMA_CNTL_CH_PAUSED) != 0;
317}
318
319static inline bool xlnx_dpdma_is_channel_retriggered(XlnxDPDMAState *s,
320 uint8_t channel)
321{
322 /* Clear the retriggered bit after reading it. */
323 bool channel_is_retriggered = s->registers[DPDMA_GBL]
324 & DPDMA_GBL_RTRG_CH(channel);
325 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_RTRG_CH(channel);
326 return channel_is_retriggered;
327}
328
329static inline bool xlnx_dpdma_is_channel_triggered(XlnxDPDMAState *s,
330 uint8_t channel)
331{
332 return s->registers[DPDMA_GBL] & DPDMA_GBL_TRG_CH(channel);
333}
334
335static void xlnx_dpdma_update_desc_info(XlnxDPDMAState *s, uint8_t channel,
336 DPDMADescriptor *desc)
337{
338 s->registers[DPDMA_DSCR_NEXT_ADDRE_CH(channel)] =
339 extract32(desc->address_extension, 0, 16);
340 s->registers[DPDMA_DSCR_NEXT_ADDR_CH(channel)] = desc->next_descriptor;
341 s->registers[DPDMA_PYLD_CUR_ADDRE_CH(channel)] =
342 extract32(desc->address_extension, 16, 16);
343 s->registers[DPDMA_PYLD_CUR_ADDR_CH(channel)] = desc->source_address;
344 s->registers[DPDMA_VDO_CH(channel)] =
345 extract32(desc->line_size_stride, 18, 14)
346 + (extract32(desc->line_size_stride, 0, 18)
347 << 14);
348 s->registers[DPDMA_PYLD_SZ_CH(channel)] = desc->xfer_size;
349 s->registers[DPDMA_DSCR_ID_CH(channel)] = desc->descriptor_id;
350
351 /* Compute the status register with the descriptor information. */
352 s->registers[DPDMA_STATUS_CH(channel)] =
353 extract32(desc->control, 0, 8) << 13;
354 if ((desc->control & DSCR_CTRL_EN_DSCR_DONE_INTR) != 0) {
355 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_DSCR_INTR;
356 }
357 if ((desc->control & DSCR_CTRL_EN_DSCR_UPDATE) != 0) {
358 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_DSCR_UP;
359 }
360 if ((desc->timestamp_msb & STATUS_DONE) != 0) {
361 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_DSCR_DONE;
362 }
363 if ((desc->control & DSCR_CTRL_IGNORE_DONE) != 0) {
364 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_IGNR_DONE;
365 }
366 if ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR_OF_FRAME) != 0) {
367 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_LDSCR_FRAME;
368 }
369 if ((desc->control & DSCR_CTRL_LAST_DESCRIPTOR) != 0) {
370 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_LAST_DSCR;
371 }
372 if ((desc->control & DSCR_CTRL_ENABLE_CRC) != 0) {
373 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_EN_CRC;
374 }
375 if ((desc->control & DSCR_CTRL_DESCRIPTOR_MODE) != 0) {
376 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_MODE;
377 }
378 if ((desc->control & DSCR_CTRL_AXI_BURST_TYPE) != 0) {
379 s->registers[DPDMA_STATUS_CH(channel)] |= DPDMA_STATUS_BURST_TYPE;
380 }
381}
382
383static void xlnx_dpdma_dump_descriptor(DPDMADescriptor *desc)
384{
385 if (DEBUG_DPDMA) {
386 qemu_log("DUMP DESCRIPTOR:\n");
387 qemu_hexdump((char *)desc, stdout, "", sizeof(DPDMADescriptor));
388 }
389}
390
391static uint64_t xlnx_dpdma_read(void *opaque, hwaddr offset,
392 unsigned size)
393{
394 XlnxDPDMAState *s = XLNX_DPDMA(opaque);
395
396 DPRINTF("read @%" HWADDR_PRIx "\n", offset);
397 offset = offset >> 2;
398
399 switch (offset) {
400 /*
401 * Trying to read a write only register.
402 */
403 case DPDMA_GBL:
404 return 0;
405 default:
406 assert(offset <= (0xFFC >> 2));
407 return s->registers[offset];
408 }
409 return 0;
410}
411
412static void xlnx_dpdma_write(void *opaque, hwaddr offset,
413 uint64_t value, unsigned size)
414{
415 XlnxDPDMAState *s = XLNX_DPDMA(opaque);
416
417 DPRINTF("write @%" HWADDR_PRIx " = %" PRIx64 "\n", offset, value);
418 offset = offset >> 2;
419
420 switch (offset) {
421 case DPDMA_ISR:
422 s->registers[DPDMA_ISR] &= ~value;
423 xlnx_dpdma_update_irq(s);
424 break;
425 case DPDMA_IEN:
426 s->registers[DPDMA_IMR] &= ~value;
427 break;
428 case DPDMA_IDS:
429 s->registers[DPDMA_IMR] |= value;
430 break;
431 case DPDMA_EISR:
432 s->registers[DPDMA_EISR] &= ~value;
433 xlnx_dpdma_update_irq(s);
434 break;
435 case DPDMA_EIEN:
436 s->registers[DPDMA_EIMR] &= ~value;
437 break;
438 case DPDMA_EIDS:
439 s->registers[DPDMA_EIMR] |= value;
440 break;
441 case DPDMA_IMR:
442 case DPDMA_EIMR:
443 case DPDMA_DSCR_NEXT_ADDRE_CH(0):
444 case DPDMA_DSCR_NEXT_ADDRE_CH(1):
445 case DPDMA_DSCR_NEXT_ADDRE_CH(2):
446 case DPDMA_DSCR_NEXT_ADDRE_CH(3):
447 case DPDMA_DSCR_NEXT_ADDRE_CH(4):
448 case DPDMA_DSCR_NEXT_ADDRE_CH(5):
449 case DPDMA_DSCR_NEXT_ADDR_CH(0):
450 case DPDMA_DSCR_NEXT_ADDR_CH(1):
451 case DPDMA_DSCR_NEXT_ADDR_CH(2):
452 case DPDMA_DSCR_NEXT_ADDR_CH(3):
453 case DPDMA_DSCR_NEXT_ADDR_CH(4):
454 case DPDMA_DSCR_NEXT_ADDR_CH(5):
455 case DPDMA_PYLD_CUR_ADDRE_CH(0):
456 case DPDMA_PYLD_CUR_ADDRE_CH(1):
457 case DPDMA_PYLD_CUR_ADDRE_CH(2):
458 case DPDMA_PYLD_CUR_ADDRE_CH(3):
459 case DPDMA_PYLD_CUR_ADDRE_CH(4):
460 case DPDMA_PYLD_CUR_ADDRE_CH(5):
461 case DPDMA_PYLD_CUR_ADDR_CH(0):
462 case DPDMA_PYLD_CUR_ADDR_CH(1):
463 case DPDMA_PYLD_CUR_ADDR_CH(2):
464 case DPDMA_PYLD_CUR_ADDR_CH(3):
465 case DPDMA_PYLD_CUR_ADDR_CH(4):
466 case DPDMA_PYLD_CUR_ADDR_CH(5):
467 case DPDMA_STATUS_CH(0):
468 case DPDMA_STATUS_CH(1):
469 case DPDMA_STATUS_CH(2):
470 case DPDMA_STATUS_CH(3):
471 case DPDMA_STATUS_CH(4):
472 case DPDMA_STATUS_CH(5):
473 case DPDMA_VDO_CH(0):
474 case DPDMA_VDO_CH(1):
475 case DPDMA_VDO_CH(2):
476 case DPDMA_VDO_CH(3):
477 case DPDMA_VDO_CH(4):
478 case DPDMA_VDO_CH(5):
479 case DPDMA_PYLD_SZ_CH(0):
480 case DPDMA_PYLD_SZ_CH(1):
481 case DPDMA_PYLD_SZ_CH(2):
482 case DPDMA_PYLD_SZ_CH(3):
483 case DPDMA_PYLD_SZ_CH(4):
484 case DPDMA_PYLD_SZ_CH(5):
485 case DPDMA_DSCR_ID_CH(0):
486 case DPDMA_DSCR_ID_CH(1):
487 case DPDMA_DSCR_ID_CH(2):
488 case DPDMA_DSCR_ID_CH(3):
489 case DPDMA_DSCR_ID_CH(4):
490 case DPDMA_DSCR_ID_CH(5):
491 /*
492 * Trying to write to a read only register..
493 */
494 break;
495 case DPDMA_GBL:
496 /*
497 * This is a write only register so it's read as zero in the read
498 * callback.
499 * We store the value anyway so we can know if the channel is
500 * enabled.
501 */
502 s->registers[offset] |= value & 0x00000FFF;
503 break;
504 case DPDMA_DSCR_STRT_ADDRE_CH(0):
505 case DPDMA_DSCR_STRT_ADDRE_CH(1):
506 case DPDMA_DSCR_STRT_ADDRE_CH(2):
507 case DPDMA_DSCR_STRT_ADDRE_CH(3):
508 case DPDMA_DSCR_STRT_ADDRE_CH(4):
509 case DPDMA_DSCR_STRT_ADDRE_CH(5):
510 value &= 0x0000FFFF;
511 s->registers[offset] = value;
512 break;
513 case DPDMA_CNTL_CH(0):
514 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(0);
515 value &= 0x3FFFFFFF;
516 s->registers[offset] = value;
517 break;
518 case DPDMA_CNTL_CH(1):
519 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(1);
520 value &= 0x3FFFFFFF;
521 s->registers[offset] = value;
522 break;
523 case DPDMA_CNTL_CH(2):
524 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(2);
525 value &= 0x3FFFFFFF;
526 s->registers[offset] = value;
527 break;
528 case DPDMA_CNTL_CH(3):
529 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(3);
530 value &= 0x3FFFFFFF;
531 s->registers[offset] = value;
532 break;
533 case DPDMA_CNTL_CH(4):
534 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(4);
535 value &= 0x3FFFFFFF;
536 s->registers[offset] = value;
537 break;
538 case DPDMA_CNTL_CH(5):
539 s->registers[DPDMA_GBL] &= ~DPDMA_GBL_TRG_CH(5);
540 value &= 0x3FFFFFFF;
541 s->registers[offset] = value;
542 break;
543 default:
544 assert(offset <= (0xFFC >> 2));
545 s->registers[offset] = value;
546 break;
547 }
548}
549
550static const MemoryRegionOps dma_ops = {
551 .read = xlnx_dpdma_read,
552 .write = xlnx_dpdma_write,
553 .endianness = DEVICE_NATIVE_ENDIAN,
554 .valid = {
555 .min_access_size = 4,
556 .max_access_size = 4,
557 },
558 .impl = {
559 .min_access_size = 4,
560 .max_access_size = 4,
561 },
562};
563
564static void xlnx_dpdma_init(Object *obj)
565{
566 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
567 XlnxDPDMAState *s = XLNX_DPDMA(obj);
568
569 memory_region_init_io(&s->iomem, obj, &dma_ops, s,
570 TYPE_XLNX_DPDMA, 0x1000);
571 sysbus_init_mmio(sbd, &s->iomem);
572 sysbus_init_irq(sbd, &s->irq);
573}
574
575static void xlnx_dpdma_reset(DeviceState *dev)
576{
577 XlnxDPDMAState *s = XLNX_DPDMA(dev);
578 size_t i;
579
580 memset(s->registers, 0, sizeof(s->registers));
581 s->registers[DPDMA_IMR] = 0x07FFFFFF;
582 s->registers[DPDMA_EIMR] = 0xFFFFFFFF;
583 s->registers[DPDMA_ALC0_MIN] = 0x0000FFFF;
584 s->registers[DPDMA_ALC1_MIN] = 0x0000FFFF;
585
586 for (i = 0; i < 6; i++) {
587 s->data[i] = NULL;
588 s->operation_finished[i] = true;
589 }
590}
591
592static void xlnx_dpdma_class_init(ObjectClass *oc, void *data)
593{
594 DeviceClass *dc = DEVICE_CLASS(oc);
595
596 dc->vmsd = &vmstate_xlnx_dpdma;
597 dc->reset = xlnx_dpdma_reset;
598}
599
600static const TypeInfo xlnx_dpdma_info = {
601 .name = TYPE_XLNX_DPDMA,
602 .parent = TYPE_SYS_BUS_DEVICE,
603 .instance_size = sizeof(XlnxDPDMAState),
604 .instance_init = xlnx_dpdma_init,
605 .class_init = xlnx_dpdma_class_init,
606};
607
608static void xlnx_dpdma_register_types(void)
609{
610 type_register_static(&xlnx_dpdma_info);
611}
612
613size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
614 bool one_desc)
615{
616 uint64_t desc_addr;
617 uint64_t source_addr[6];
618 DPDMADescriptor desc;
619 bool done = false;
620 size_t ptr = 0;
621
622 assert(channel <= 5);
623
624 DPRINTF("start dpdma channel 0x%" PRIX8 "\n", channel);
625
626 if (!xlnx_dpdma_is_channel_triggered(s, channel)) {
627 DPRINTF("Channel isn't triggered..\n");
628 return 0;
629 }
630
631 if (!xlnx_dpdma_is_channel_enabled(s, channel)) {
632 DPRINTF("Channel isn't enabled..\n");
633 return 0;
634 }
635
636 if (xlnx_dpdma_is_channel_paused(s, channel)) {
637 DPRINTF("Channel is paused..\n");
638 return 0;
639 }
640
641 do {
642 if ((s->operation_finished[channel])
643 || xlnx_dpdma_is_channel_retriggered(s, channel)) {
644 desc_addr = xlnx_dpdma_descriptor_start_address(s, channel);
645 s->operation_finished[channel] = false;
646 } else {
647 desc_addr = xlnx_dpdma_descriptor_next_address(s, channel);
648 }
649
650 if (dma_memory_read(&address_space_memory, desc_addr, &desc,
651 sizeof(DPDMADescriptor))) {
652 s->registers[DPDMA_EISR] |= ((1 << 1) << channel);
653 xlnx_dpdma_update_irq(s);
654 s->operation_finished[channel] = true;
655 DPRINTF("Can't get the descriptor.\n");
656 break;
657 }
658
659 xlnx_dpdma_update_desc_info(s, channel, &desc);
660
661#ifdef DEBUG_DPDMA
662 xlnx_dpdma_dump_descriptor(&desc);
663#endif
664
665 DPRINTF("location of the descriptor: %" PRIx64 "\n", desc_addr);
666 if (!xlnx_dpdma_desc_is_valid(&desc)) {
667 s->registers[DPDMA_EISR] |= ((1 << 7) << channel);
668 xlnx_dpdma_update_irq(s);
669 s->operation_finished[channel] = true;
670 DPRINTF("Invalid descriptor..\n");
671 break;
672 }
673
674 if (xlnx_dpdma_desc_crc_enabled(&desc)
675 && !xlnx_dpdma_desc_check_crc(&desc)) {
676 s->registers[DPDMA_EISR] |= ((1 << 13) << channel);
677 xlnx_dpdma_update_irq(s);
678 s->operation_finished[channel] = true;
679 DPRINTF("Bad CRC for descriptor..\n");
680 break;
681 }
682
683 if (xlnx_dpdma_desc_is_already_done(&desc)
684 && !xlnx_dpdma_desc_ignore_done_bit(&desc)) {
685 /* We are trying to process an already processed descriptor. */
686 s->registers[DPDMA_EISR] |= ((1 << 25) << channel);
687 xlnx_dpdma_update_irq(s);
688 s->operation_finished[channel] = true;
689 DPRINTF("Already processed descriptor..\n");
690 break;
691 }
692
693 done = xlnx_dpdma_desc_is_last(&desc)
694 || xlnx_dpdma_desc_is_last_of_frame(&desc);
695
696 s->operation_finished[channel] = done;
697 if (s->data[channel]) {
698 int64_t transfer_len = xlnx_dpdma_desc_get_transfer_size(&desc);
699 uint32_t line_size = xlnx_dpdma_desc_get_line_size(&desc);
700 uint32_t line_stride = xlnx_dpdma_desc_get_line_stride(&desc);
701 if (xlnx_dpdma_desc_is_contiguous(&desc)) {
702 source_addr[0] = xlnx_dpdma_desc_get_source_address(&desc, 0);
703 while (transfer_len != 0) {
704 if (dma_memory_read(&address_space_memory,
705 source_addr[0],
706 &s->data[channel][ptr],
707 line_size)) {
708 s->registers[DPDMA_ISR] |= ((1 << 12) << channel);
709 xlnx_dpdma_update_irq(s);
710 DPRINTF("Can't get data.\n");
711 break;
712 }
713 ptr += line_size;
714 transfer_len -= line_size;
715 source_addr[0] += line_stride;
716 }
717 } else {
718 DPRINTF("Source address:\n");
719 int frag;
720 for (frag = 0; frag < 5; frag++) {
721 source_addr[frag] =
722 xlnx_dpdma_desc_get_source_address(&desc, frag);
723 DPRINTF("Fragment %u: %" PRIx64 "\n", frag + 1,
724 source_addr[frag]);
725 }
726
727 frag = 0;
728 while ((transfer_len < 0) && (frag < 5)) {
729 size_t fragment_len = DPDMA_FRAG_MAX_SZ
730 - (source_addr[frag] % DPDMA_FRAG_MAX_SZ);
731
732 if (dma_memory_read(&address_space_memory,
733 source_addr[frag],
734 &(s->data[channel][ptr]),
735 fragment_len)) {
736 s->registers[DPDMA_ISR] |= ((1 << 12) << channel);
737 xlnx_dpdma_update_irq(s);
738 DPRINTF("Can't get data.\n");
739 break;
740 }
741 ptr += fragment_len;
742 transfer_len -= fragment_len;
743 frag += 1;
744 }
745 }
746 }
747
748 if (xlnx_dpdma_desc_update_enabled(&desc)) {
749 /* The descriptor need to be updated when it's completed. */
750 DPRINTF("update the descriptor with the done flag set.\n");
751 xlnx_dpdma_desc_set_done(&desc);
752 dma_memory_write(&address_space_memory, desc_addr, &desc,
753 sizeof(DPDMADescriptor));
754 }
755
756 if (xlnx_dpdma_desc_completion_interrupt(&desc)) {
757 DPRINTF("completion interrupt enabled!\n");
758 s->registers[DPDMA_ISR] |= (1 << channel);
759 xlnx_dpdma_update_irq(s);
760 }
761
762 } while (!done && !one_desc);
763
764 return ptr;
765}
766
767void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel,
768 void *p)
769{
770 if (!s) {
771 qemu_log_mask(LOG_UNIMP, "DPDMA client not attached to valid DPDMA"
772 " instance\n");
773 return;
774 }
775
776 assert(channel <= 5);
777 s->data[channel] = p;
778}
779
780void xlnx_dpdma_trigger_vsync_irq(XlnxDPDMAState *s)
781{
782 s->registers[DPDMA_ISR] |= (1 << 27);
783 xlnx_dpdma_update_irq(s);
784}
785
786type_init(xlnx_dpdma_register_types)
Empty description
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