ti_k3_dsp_remoteproc.c 21 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * TI K3 DSP Remote Processor(s) driver
  4. *
  5. * Copyright (C) 2018-2020 Texas Instruments Incorporated - https://www.ti.com/
  6. * Suman Anna <s-anna@ti.com>
  7. */
  8. #include <linux/io.h>
  9. #include <linux/mailbox_client.h>
  10. #include <linux/module.h>
  11. #include <linux/of_device.h>
  12. #include <linux/of_reserved_mem.h>
  13. #include <linux/omap-mailbox.h>
  14. #include <linux/platform_device.h>
  15. #include <linux/remoteproc.h>
  16. #include <linux/reset.h>
  17. #include <linux/slab.h>
  18. #include "omap_remoteproc.h"
  19. #include "remoteproc_internal.h"
  20. #include "ti_sci_proc.h"
  21. #define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
  22. /**
  23. * struct k3_dsp_mem - internal memory structure
  24. * @cpu_addr: MPU virtual address of the memory region
  25. * @bus_addr: Bus address used to access the memory region
  26. * @dev_addr: Device address of the memory region from DSP view
  27. * @size: Size of the memory region
  28. */
  29. struct k3_dsp_mem {
  30. void __iomem *cpu_addr;
  31. phys_addr_t bus_addr;
  32. u32 dev_addr;
  33. size_t size;
  34. };
  35. /**
  36. * struct k3_dsp_mem_data - memory definitions for a DSP
  37. * @name: name for this memory entry
  38. * @dev_addr: device address for the memory entry
  39. */
  40. struct k3_dsp_mem_data {
  41. const char *name;
  42. const u32 dev_addr;
  43. };
  44. /**
  45. * struct k3_dsp_dev_data - device data structure for a DSP
  46. * @mems: pointer to memory definitions for a DSP
  47. * @num_mems: number of memory regions in @mems
  48. * @boot_align_addr: boot vector address alignment granularity
  49. * @uses_lreset: flag to denote the need for local reset management
  50. */
  51. struct k3_dsp_dev_data {
  52. const struct k3_dsp_mem_data *mems;
  53. u32 num_mems;
  54. u32 boot_align_addr;
  55. bool uses_lreset;
  56. };
  57. /**
  58. * struct k3_dsp_rproc - k3 DSP remote processor driver structure
  59. * @dev: cached device pointer
  60. * @rproc: remoteproc device handle
  61. * @mem: internal memory regions data
  62. * @num_mems: number of internal memory regions
  63. * @rmem: reserved memory regions data
  64. * @num_rmems: number of reserved memory regions
  65. * @reset: reset control handle
  66. * @data: pointer to DSP-specific device data
  67. * @tsp: TI-SCI processor control handle
  68. * @ti_sci: TI-SCI handle
  69. * @ti_sci_id: TI-SCI device identifier
  70. * @mbox: mailbox channel handle
  71. * @client: mailbox client to request the mailbox channel
  72. */
  73. struct k3_dsp_rproc {
  74. struct device *dev;
  75. struct rproc *rproc;
  76. struct k3_dsp_mem *mem;
  77. int num_mems;
  78. struct k3_dsp_mem *rmem;
  79. int num_rmems;
  80. struct reset_control *reset;
  81. const struct k3_dsp_dev_data *data;
  82. struct ti_sci_proc *tsp;
  83. const struct ti_sci_handle *ti_sci;
  84. u32 ti_sci_id;
  85. struct mbox_chan *mbox;
  86. struct mbox_client client;
  87. };
  88. /**
  89. * k3_dsp_rproc_mbox_callback() - inbound mailbox message handler
  90. * @client: mailbox client pointer used for requesting the mailbox channel
  91. * @data: mailbox payload
  92. *
  93. * This handler is invoked by the OMAP mailbox driver whenever a mailbox
  94. * message is received. Usually, the mailbox payload simply contains
  95. * the index of the virtqueue that is kicked by the remote processor,
  96. * and we let remoteproc core handle it.
  97. *
  98. * In addition to virtqueue indices, we also have some out-of-band values
  99. * that indicate different events. Those values are deliberately very
  100. * large so they don't coincide with virtqueue indices.
  101. */
  102. static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
  103. {
  104. struct k3_dsp_rproc *kproc = container_of(client, struct k3_dsp_rproc,
  105. client);
  106. struct device *dev = kproc->rproc->dev.parent;
  107. const char *name = kproc->rproc->name;
  108. u32 msg = omap_mbox_message(data);
  109. dev_dbg(dev, "mbox msg: 0x%x\n", msg);
  110. switch (msg) {
  111. case RP_MBOX_CRASH:
  112. /*
  113. * remoteproc detected an exception, but error recovery is not
  114. * supported. So, just log this for now
  115. */
  116. dev_err(dev, "K3 DSP rproc %s crashed\n", name);
  117. break;
  118. case RP_MBOX_ECHO_REPLY:
  119. dev_info(dev, "received echo reply from %s\n", name);
  120. break;
  121. default:
  122. /* silently handle all other valid messages */
  123. if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
  124. return;
  125. if (msg > kproc->rproc->max_notifyid) {
  126. dev_dbg(dev, "dropping unknown message 0x%x", msg);
  127. return;
  128. }
  129. /* msg contains the index of the triggered vring */
  130. if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
  131. dev_dbg(dev, "no message was found in vqid %d\n", msg);
  132. }
  133. }
  134. /*
  135. * Kick the remote processor to notify about pending unprocessed messages.
  136. * The vqid usage is not used and is inconsequential, as the kick is performed
  137. * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
  138. * the remote processor is expected to process both its Tx and Rx virtqueues.
  139. */
  140. static void k3_dsp_rproc_kick(struct rproc *rproc, int vqid)
  141. {
  142. struct k3_dsp_rproc *kproc = rproc->priv;
  143. struct device *dev = rproc->dev.parent;
  144. mbox_msg_t msg = (mbox_msg_t)vqid;
  145. int ret;
  146. /* send the index of the triggered virtqueue in the mailbox payload */
  147. ret = mbox_send_message(kproc->mbox, (void *)msg);
  148. if (ret < 0)
  149. dev_err(dev, "failed to send mailbox message, status = %d\n",
  150. ret);
  151. }
  152. /* Put the DSP processor into reset */
  153. static int k3_dsp_rproc_reset(struct k3_dsp_rproc *kproc)
  154. {
  155. struct device *dev = kproc->dev;
  156. int ret;
  157. ret = reset_control_assert(kproc->reset);
  158. if (ret) {
  159. dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
  160. return ret;
  161. }
  162. if (kproc->data->uses_lreset)
  163. return ret;
  164. ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
  165. kproc->ti_sci_id);
  166. if (ret) {
  167. dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
  168. if (reset_control_deassert(kproc->reset))
  169. dev_warn(dev, "local-reset deassert back failed\n");
  170. }
  171. return ret;
  172. }
  173. /* Release the DSP processor from reset */
  174. static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc)
  175. {
  176. struct device *dev = kproc->dev;
  177. int ret;
  178. if (kproc->data->uses_lreset)
  179. goto lreset;
  180. ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
  181. kproc->ti_sci_id);
  182. if (ret) {
  183. dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
  184. return ret;
  185. }
  186. lreset:
  187. ret = reset_control_deassert(kproc->reset);
  188. if (ret) {
  189. dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
  190. if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
  191. kproc->ti_sci_id))
  192. dev_warn(dev, "module-reset assert back failed\n");
  193. }
  194. return ret;
  195. }
  196. /*
  197. * The C66x DSP cores have a local reset that affects only the CPU, and a
  198. * generic module reset that powers on the device and allows the DSP internal
  199. * memories to be accessed while the local reset is asserted. This function is
  200. * used to release the global reset on C66x DSPs to allow loading into the DSP
  201. * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
  202. * firmware loading, and is followed by the .start() ops after loading to
  203. * actually let the C66x DSP cores run.
  204. */
  205. static int k3_dsp_rproc_prepare(struct rproc *rproc)
  206. {
  207. struct k3_dsp_rproc *kproc = rproc->priv;
  208. struct device *dev = kproc->dev;
  209. int ret;
  210. ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
  211. kproc->ti_sci_id);
  212. if (ret)
  213. dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading, ret = %d\n",
  214. ret);
  215. return ret;
  216. }
  217. /*
  218. * This function implements the .unprepare() ops and performs the complimentary
  219. * operations to that of the .prepare() ops. The function is used to assert the
  220. * global reset on applicable C66x cores. This completes the second portion of
  221. * powering down the C66x DSP cores. The cores themselves are only halted in the
  222. * .stop() callback through the local reset, and the .unprepare() ops is invoked
  223. * by the remoteproc core after the remoteproc is stopped to balance the global
  224. * reset.
  225. */
  226. static int k3_dsp_rproc_unprepare(struct rproc *rproc)
  227. {
  228. struct k3_dsp_rproc *kproc = rproc->priv;
  229. struct device *dev = kproc->dev;
  230. int ret;
  231. ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
  232. kproc->ti_sci_id);
  233. if (ret)
  234. dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
  235. return ret;
  236. }
  237. /*
  238. * Power up the DSP remote processor.
  239. *
  240. * This function will be invoked only after the firmware for this rproc
  241. * was loaded, parsed successfully, and all of its resource requirements
  242. * were met.
  243. */
  244. static int k3_dsp_rproc_start(struct rproc *rproc)
  245. {
  246. struct k3_dsp_rproc *kproc = rproc->priv;
  247. struct mbox_client *client = &kproc->client;
  248. struct device *dev = kproc->dev;
  249. u32 boot_addr;
  250. int ret;
  251. client->dev = dev;
  252. client->tx_done = NULL;
  253. client->rx_callback = k3_dsp_rproc_mbox_callback;
  254. client->tx_block = false;
  255. client->knows_txdone = false;
  256. kproc->mbox = mbox_request_channel(client, 0);
  257. if (IS_ERR(kproc->mbox)) {
  258. ret = -EBUSY;
  259. dev_err(dev, "mbox_request_channel failed: %ld\n",
  260. PTR_ERR(kproc->mbox));
  261. return ret;
  262. }
  263. /*
  264. * Ping the remote processor, this is only for sanity-sake for now;
  265. * there is no functional effect whatsoever.
  266. *
  267. * Note that the reply will _not_ arrive immediately: this message
  268. * will wait in the mailbox fifo until the remote processor is booted.
  269. */
  270. ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
  271. if (ret < 0) {
  272. dev_err(dev, "mbox_send_message failed: %d\n", ret);
  273. goto put_mbox;
  274. }
  275. boot_addr = rproc->bootaddr;
  276. if (boot_addr & (kproc->data->boot_align_addr - 1)) {
  277. dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
  278. boot_addr, kproc->data->boot_align_addr);
  279. ret = -EINVAL;
  280. goto put_mbox;
  281. }
  282. dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
  283. ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
  284. if (ret)
  285. goto put_mbox;
  286. ret = k3_dsp_rproc_release(kproc);
  287. if (ret)
  288. goto put_mbox;
  289. return 0;
  290. put_mbox:
  291. mbox_free_channel(kproc->mbox);
  292. return ret;
  293. }
  294. /*
  295. * Stop the DSP remote processor.
  296. *
  297. * This function puts the DSP processor into reset, and finishes processing
  298. * of any pending messages.
  299. */
  300. static int k3_dsp_rproc_stop(struct rproc *rproc)
  301. {
  302. struct k3_dsp_rproc *kproc = rproc->priv;
  303. mbox_free_channel(kproc->mbox);
  304. k3_dsp_rproc_reset(kproc);
  305. return 0;
  306. }
  307. /*
  308. * Custom function to translate a DSP device address (internal RAMs only) to a
  309. * kernel virtual address. The DSPs can access their RAMs at either an internal
  310. * address visible only from a DSP, or at the SoC-level bus address. Both these
  311. * addresses need to be looked through for translation. The translated addresses
  312. * can be used either by the remoteproc core for loading (when using kernel
  313. * remoteproc loader), or by any rpmsg bus drivers.
  314. */
  315. static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
  316. {
  317. struct k3_dsp_rproc *kproc = rproc->priv;
  318. void __iomem *va = NULL;
  319. phys_addr_t bus_addr;
  320. u32 dev_addr, offset;
  321. size_t size;
  322. int i;
  323. if (len == 0)
  324. return NULL;
  325. for (i = 0; i < kproc->num_mems; i++) {
  326. bus_addr = kproc->mem[i].bus_addr;
  327. dev_addr = kproc->mem[i].dev_addr;
  328. size = kproc->mem[i].size;
  329. if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
  330. /* handle DSP-view addresses */
  331. if (da >= dev_addr &&
  332. ((da + len) <= (dev_addr + size))) {
  333. offset = da - dev_addr;
  334. va = kproc->mem[i].cpu_addr + offset;
  335. return (__force void *)va;
  336. }
  337. } else {
  338. /* handle SoC-view addresses */
  339. if (da >= bus_addr &&
  340. (da + len) <= (bus_addr + size)) {
  341. offset = da - bus_addr;
  342. va = kproc->mem[i].cpu_addr + offset;
  343. return (__force void *)va;
  344. }
  345. }
  346. }
  347. /* handle static DDR reserved memory regions */
  348. for (i = 0; i < kproc->num_rmems; i++) {
  349. dev_addr = kproc->rmem[i].dev_addr;
  350. size = kproc->rmem[i].size;
  351. if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
  352. offset = da - dev_addr;
  353. va = kproc->rmem[i].cpu_addr + offset;
  354. return (__force void *)va;
  355. }
  356. }
  357. return NULL;
  358. }
  359. static const struct rproc_ops k3_dsp_rproc_ops = {
  360. .start = k3_dsp_rproc_start,
  361. .stop = k3_dsp_rproc_stop,
  362. .kick = k3_dsp_rproc_kick,
  363. .da_to_va = k3_dsp_rproc_da_to_va,
  364. };
  365. static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,
  366. struct k3_dsp_rproc *kproc)
  367. {
  368. const struct k3_dsp_dev_data *data = kproc->data;
  369. struct device *dev = &pdev->dev;
  370. struct resource *res;
  371. int num_mems = 0;
  372. int i;
  373. num_mems = kproc->data->num_mems;
  374. kproc->mem = devm_kcalloc(kproc->dev, num_mems,
  375. sizeof(*kproc->mem), GFP_KERNEL);
  376. if (!kproc->mem)
  377. return -ENOMEM;
  378. for (i = 0; i < num_mems; i++) {
  379. res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
  380. data->mems[i].name);
  381. if (!res) {
  382. dev_err(dev, "found no memory resource for %s\n",
  383. data->mems[i].name);
  384. return -EINVAL;
  385. }
  386. if (!devm_request_mem_region(dev, res->start,
  387. resource_size(res),
  388. dev_name(dev))) {
  389. dev_err(dev, "could not request %s region for resource\n",
  390. data->mems[i].name);
  391. return -EBUSY;
  392. }
  393. kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
  394. resource_size(res));
  395. if (!kproc->mem[i].cpu_addr) {
  396. dev_err(dev, "failed to map %s memory\n",
  397. data->mems[i].name);
  398. return -ENOMEM;
  399. }
  400. kproc->mem[i].bus_addr = res->start;
  401. kproc->mem[i].dev_addr = data->mems[i].dev_addr;
  402. kproc->mem[i].size = resource_size(res);
  403. dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
  404. data->mems[i].name, &kproc->mem[i].bus_addr,
  405. kproc->mem[i].size, kproc->mem[i].cpu_addr,
  406. kproc->mem[i].dev_addr);
  407. }
  408. kproc->num_mems = num_mems;
  409. return 0;
  410. }
  411. static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
  412. {
  413. struct device *dev = kproc->dev;
  414. struct device_node *np = dev->of_node;
  415. struct device_node *rmem_np;
  416. struct reserved_mem *rmem;
  417. int num_rmems;
  418. int ret, i;
  419. num_rmems = of_property_count_elems_of_size(np, "memory-region",
  420. sizeof(phandle));
  421. if (num_rmems <= 0) {
  422. dev_err(dev, "device does not reserved memory regions, ret = %d\n",
  423. num_rmems);
  424. return -EINVAL;
  425. }
  426. if (num_rmems < 2) {
  427. dev_err(dev, "device needs atleast two memory regions to be defined, num = %d\n",
  428. num_rmems);
  429. return -EINVAL;
  430. }
  431. /* use reserved memory region 0 for vring DMA allocations */
  432. ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
  433. if (ret) {
  434. dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
  435. ret);
  436. return ret;
  437. }
  438. num_rmems--;
  439. kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
  440. if (!kproc->rmem) {
  441. ret = -ENOMEM;
  442. goto release_rmem;
  443. }
  444. /* use remaining reserved memory regions for static carveouts */
  445. for (i = 0; i < num_rmems; i++) {
  446. rmem_np = of_parse_phandle(np, "memory-region", i + 1);
  447. if (!rmem_np) {
  448. ret = -EINVAL;
  449. goto unmap_rmem;
  450. }
  451. rmem = of_reserved_mem_lookup(rmem_np);
  452. if (!rmem) {
  453. of_node_put(rmem_np);
  454. ret = -EINVAL;
  455. goto unmap_rmem;
  456. }
  457. of_node_put(rmem_np);
  458. kproc->rmem[i].bus_addr = rmem->base;
  459. /* 64-bit address regions currently not supported */
  460. kproc->rmem[i].dev_addr = (u32)rmem->base;
  461. kproc->rmem[i].size = rmem->size;
  462. kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
  463. if (!kproc->rmem[i].cpu_addr) {
  464. dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
  465. i + 1, &rmem->base, &rmem->size);
  466. ret = -ENOMEM;
  467. goto unmap_rmem;
  468. }
  469. dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
  470. i + 1, &kproc->rmem[i].bus_addr,
  471. kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
  472. kproc->rmem[i].dev_addr);
  473. }
  474. kproc->num_rmems = num_rmems;
  475. return 0;
  476. unmap_rmem:
  477. for (i--; i >= 0; i--)
  478. iounmap(kproc->rmem[i].cpu_addr);
  479. kfree(kproc->rmem);
  480. release_rmem:
  481. of_reserved_mem_device_release(kproc->dev);
  482. return ret;
  483. }
  484. static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc *kproc)
  485. {
  486. int i;
  487. for (i = 0; i < kproc->num_rmems; i++)
  488. iounmap(kproc->rmem[i].cpu_addr);
  489. kfree(kproc->rmem);
  490. of_reserved_mem_device_release(kproc->dev);
  491. }
  492. static
  493. struct ti_sci_proc *k3_dsp_rproc_of_get_tsp(struct device *dev,
  494. const struct ti_sci_handle *sci)
  495. {
  496. struct ti_sci_proc *tsp;
  497. u32 temp[2];
  498. int ret;
  499. ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
  500. temp, 2);
  501. if (ret < 0)
  502. return ERR_PTR(ret);
  503. tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
  504. if (!tsp)
  505. return ERR_PTR(-ENOMEM);
  506. tsp->dev = dev;
  507. tsp->sci = sci;
  508. tsp->ops = &sci->ops.proc_ops;
  509. tsp->proc_id = temp[0];
  510. tsp->host_id = temp[1];
  511. return tsp;
  512. }
  513. static int k3_dsp_rproc_probe(struct platform_device *pdev)
  514. {
  515. struct device *dev = &pdev->dev;
  516. struct device_node *np = dev->of_node;
  517. const struct k3_dsp_dev_data *data;
  518. struct k3_dsp_rproc *kproc;
  519. struct rproc *rproc;
  520. const char *fw_name;
  521. int ret = 0;
  522. int ret1;
  523. data = of_device_get_match_data(dev);
  524. if (!data)
  525. return -ENODEV;
  526. ret = rproc_of_parse_firmware(dev, 0, &fw_name);
  527. if (ret) {
  528. dev_err(dev, "failed to parse firmware-name property, ret = %d\n",
  529. ret);
  530. return ret;
  531. }
  532. rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
  533. sizeof(*kproc));
  534. if (!rproc)
  535. return -ENOMEM;
  536. rproc->has_iommu = false;
  537. rproc->recovery_disabled = true;
  538. if (data->uses_lreset) {
  539. rproc->ops->prepare = k3_dsp_rproc_prepare;
  540. rproc->ops->unprepare = k3_dsp_rproc_unprepare;
  541. }
  542. kproc = rproc->priv;
  543. kproc->rproc = rproc;
  544. kproc->dev = dev;
  545. kproc->data = data;
  546. kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
  547. if (IS_ERR(kproc->ti_sci)) {
  548. ret = PTR_ERR(kproc->ti_sci);
  549. if (ret != -EPROBE_DEFER) {
  550. dev_err(dev, "failed to get ti-sci handle, ret = %d\n",
  551. ret);
  552. }
  553. kproc->ti_sci = NULL;
  554. goto free_rproc;
  555. }
  556. ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
  557. if (ret) {
  558. dev_err(dev, "missing 'ti,sci-dev-id' property\n");
  559. goto put_sci;
  560. }
  561. kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
  562. if (IS_ERR(kproc->reset)) {
  563. ret = PTR_ERR(kproc->reset);
  564. dev_err(dev, "failed to get reset, status = %d\n", ret);
  565. goto put_sci;
  566. }
  567. kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
  568. if (IS_ERR(kproc->tsp)) {
  569. dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n",
  570. ret);
  571. ret = PTR_ERR(kproc->tsp);
  572. goto put_sci;
  573. }
  574. ret = ti_sci_proc_request(kproc->tsp);
  575. if (ret < 0) {
  576. dev_err(dev, "ti_sci_proc_request failed, ret = %d\n", ret);
  577. goto free_tsp;
  578. }
  579. ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
  580. if (ret)
  581. goto release_tsp;
  582. ret = k3_dsp_reserved_mem_init(kproc);
  583. if (ret) {
  584. dev_err(dev, "reserved memory init failed, ret = %d\n", ret);
  585. goto release_tsp;
  586. }
  587. /*
  588. * ensure the DSP local reset is asserted to ensure the DSP doesn't
  589. * execute bogus code in .prepare() when the module reset is released.
  590. */
  591. if (data->uses_lreset) {
  592. ret = reset_control_status(kproc->reset);
  593. if (ret < 0) {
  594. dev_err(dev, "failed to get reset status, status = %d\n",
  595. ret);
  596. goto release_mem;
  597. } else if (ret == 0) {
  598. dev_warn(dev, "local reset is deasserted for device\n");
  599. k3_dsp_rproc_reset(kproc);
  600. }
  601. }
  602. ret = rproc_add(rproc);
  603. if (ret) {
  604. dev_err(dev, "failed to add register device with remoteproc core, status = %d\n",
  605. ret);
  606. goto release_mem;
  607. }
  608. platform_set_drvdata(pdev, kproc);
  609. return 0;
  610. release_mem:
  611. k3_dsp_reserved_mem_exit(kproc);
  612. release_tsp:
  613. ret1 = ti_sci_proc_release(kproc->tsp);
  614. if (ret1)
  615. dev_err(dev, "failed to release proc, ret = %d\n", ret1);
  616. free_tsp:
  617. kfree(kproc->tsp);
  618. put_sci:
  619. ret1 = ti_sci_put_handle(kproc->ti_sci);
  620. if (ret1)
  621. dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret1);
  622. free_rproc:
  623. rproc_free(rproc);
  624. return ret;
  625. }
  626. static int k3_dsp_rproc_remove(struct platform_device *pdev)
  627. {
  628. struct k3_dsp_rproc *kproc = platform_get_drvdata(pdev);
  629. struct device *dev = &pdev->dev;
  630. int ret;
  631. rproc_del(kproc->rproc);
  632. ret = ti_sci_proc_release(kproc->tsp);
  633. if (ret)
  634. dev_err(dev, "failed to release proc, ret = %d\n", ret);
  635. kfree(kproc->tsp);
  636. ret = ti_sci_put_handle(kproc->ti_sci);
  637. if (ret)
  638. dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret);
  639. k3_dsp_reserved_mem_exit(kproc);
  640. rproc_free(kproc->rproc);
  641. return 0;
  642. }
  643. static const struct k3_dsp_mem_data c66_mems[] = {
  644. { .name = "l2sram", .dev_addr = 0x800000 },
  645. { .name = "l1pram", .dev_addr = 0xe00000 },
  646. { .name = "l1dram", .dev_addr = 0xf00000 },
  647. };
  648. /* C71x cores only have a L1P Cache, there are no L1P SRAMs */
  649. static const struct k3_dsp_mem_data c71_mems[] = {
  650. { .name = "l2sram", .dev_addr = 0x800000 },
  651. { .name = "l1dram", .dev_addr = 0xe00000 },
  652. };
  653. static const struct k3_dsp_dev_data c66_data = {
  654. .mems = c66_mems,
  655. .num_mems = ARRAY_SIZE(c66_mems),
  656. .boot_align_addr = SZ_1K,
  657. .uses_lreset = true,
  658. };
  659. static const struct k3_dsp_dev_data c71_data = {
  660. .mems = c71_mems,
  661. .num_mems = ARRAY_SIZE(c71_mems),
  662. .boot_align_addr = SZ_2M,
  663. .uses_lreset = false,
  664. };
  665. static const struct of_device_id k3_dsp_of_match[] = {
  666. { .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
  667. { .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
  668. { /* sentinel */ },
  669. };
  670. MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
  671. static struct platform_driver k3_dsp_rproc_driver = {
  672. .probe = k3_dsp_rproc_probe,
  673. .remove = k3_dsp_rproc_remove,
  674. .driver = {
  675. .name = "k3-dsp-rproc",
  676. .of_match_table = k3_dsp_of_match,
  677. },
  678. };
  679. module_platform_driver(k3_dsp_rproc_driver);
  680. MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
  681. MODULE_LICENSE("GPL v2");
  682. MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");