Lines Matching refs:smc
56 static int apple_smc_cmd_locked(struct apple_smc *smc, u64 cmd, u64 arg, in apple_smc_cmd_locked() argument
63 lockdep_assert_held(&smc->mutex); in apple_smc_cmd_locked()
65 if (smc->boot_stage != APPLE_SMC_INITIALIZED) in apple_smc_cmd_locked()
67 if (smc->atomic_mode) in apple_smc_cmd_locked()
70 reinit_completion(&smc->cmd_done); in apple_smc_cmd_locked()
72 smc->msg_id = (smc->msg_id + 1) & 0xf; in apple_smc_cmd_locked()
76 FIELD_PREP(SMC_ID, smc->msg_id) | in apple_smc_cmd_locked()
79 ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT, msg, NULL, false); in apple_smc_cmd_locked()
81 dev_err(smc->dev, "Failed to send command\n"); in apple_smc_cmd_locked()
85 if (wait_for_completion_timeout(&smc->cmd_done, msecs_to_jiffies(SMC_TIMEOUT_MS)) <= 0) { in apple_smc_cmd_locked()
86 dev_err(smc->dev, "Command timed out (%llx)", msg); in apple_smc_cmd_locked()
90 if (FIELD_GET(SMC_ID, smc->cmd_ret) != smc->msg_id) { in apple_smc_cmd_locked()
91 dev_err(smc->dev, "Command sequence mismatch (expected %d, got %d)\n", in apple_smc_cmd_locked()
92 smc->msg_id, (unsigned int)FIELD_GET(SMC_ID, smc->cmd_ret)); in apple_smc_cmd_locked()
96 result = FIELD_GET(SMC_RESULT, smc->cmd_ret); in apple_smc_cmd_locked()
101 *ret_data = FIELD_GET(SMC_DATA, smc->cmd_ret); in apple_smc_cmd_locked()
103 return FIELD_GET(SMC_SIZE, smc->cmd_ret); in apple_smc_cmd_locked()
106 static int apple_smc_cmd(struct apple_smc *smc, u64 cmd, u64 arg, in apple_smc_cmd() argument
109 guard(mutex)(&smc->mutex); in apple_smc_cmd()
111 return apple_smc_cmd_locked(smc, cmd, arg, size, wsize, ret_data); in apple_smc_cmd()
114 static int apple_smc_rw_locked(struct apple_smc *smc, smc_key key, in apple_smc_rw_locked() argument
123 lockdep_assert_held(&smc->mutex); in apple_smc_rw_locked()
132 memcpy_toio(smc->shmem.iomem, wbuf, wsize); in apple_smc_rw_locked()
137 memcpy_toio(smc->shmem.iomem, wbuf, wsize); in apple_smc_rw_locked()
152 ret = apple_smc_cmd_locked(smc, cmd, key, smc_size, smc_wsize, &rdata); in apple_smc_rw_locked()
166 memcpy_fromio(rbuf, smc->shmem.iomem, rsize); in apple_smc_rw_locked()
172 int apple_smc_read(struct apple_smc *smc, smc_key key, void *buf, size_t size) in apple_smc_read() argument
174 guard(mutex)(&smc->mutex); in apple_smc_read()
176 return apple_smc_rw_locked(smc, key, NULL, 0, buf, size); in apple_smc_read()
180 int apple_smc_write(struct apple_smc *smc, smc_key key, const void *buf, size_t size) in apple_smc_write() argument
182 guard(mutex)(&smc->mutex); in apple_smc_write()
184 return apple_smc_rw_locked(smc, key, buf, size, NULL, 0); in apple_smc_write()
188 int apple_smc_rw(struct apple_smc *smc, smc_key key, const void *wbuf, size_t wsize, in apple_smc_rw() argument
191 guard(mutex)(&smc->mutex); in apple_smc_rw()
193 return apple_smc_rw_locked(smc, key, wbuf, wsize, rbuf, rsize); in apple_smc_rw()
197 int apple_smc_get_key_by_index(struct apple_smc *smc, int index, smc_key *key) in apple_smc_get_key_by_index() argument
201 ret = apple_smc_cmd(smc, SMC_MSG_GET_KEY_BY_INDEX, index, 0, 0, key); in apple_smc_get_key_by_index()
208 int apple_smc_get_key_info(struct apple_smc *smc, smc_key key, struct apple_smc_key_info *info) in apple_smc_get_key_info() argument
213 ret = apple_smc_cmd(smc, SMC_MSG_GET_KEY_INFO, key, 0, 0, NULL); in apple_smc_get_key_info()
215 memcpy_fromio(key_info, smc->shmem.iomem, sizeof(key_info)); in apple_smc_get_key_info()
224 int apple_smc_enter_atomic(struct apple_smc *smc) in apple_smc_enter_atomic() argument
226 guard(mutex)(&smc->mutex); in apple_smc_enter_atomic()
238 apple_smc_rw_locked(smc, SMC_KEY(NTAP), &flag, sizeof(flag), NULL, 0); in apple_smc_enter_atomic()
240 smc->atomic_mode = true; in apple_smc_enter_atomic()
246 int apple_smc_write_atomic(struct apple_smc *smc, smc_key key, const void *buf, size_t size) in apple_smc_write_atomic() argument
248 guard(spinlock_irqsave)(&smc->lock); in apple_smc_write_atomic()
256 if (smc->boot_stage != APPLE_SMC_INITIALIZED) in apple_smc_write_atomic()
258 if (!smc->atomic_mode) in apple_smc_write_atomic()
261 memcpy_toio(smc->shmem.iomem, buf, size); in apple_smc_write_atomic()
262 smc->msg_id = (smc->msg_id + 1) & 0xf; in apple_smc_write_atomic()
265 FIELD_PREP(SMC_ID, smc->msg_id) | in apple_smc_write_atomic()
267 smc->atomic_pending = true; in apple_smc_write_atomic()
269 ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT, msg, NULL, true); in apple_smc_write_atomic()
271 dev_err(smc->dev, "Failed to send command (%d)\n", ret); in apple_smc_write_atomic()
275 while (smc->atomic_pending) { in apple_smc_write_atomic()
276 ret = apple_rtkit_poll(smc->rtk); in apple_smc_write_atomic()
278 dev_err(smc->dev, "RTKit poll failed (%llx)", msg); in apple_smc_write_atomic()
284 if (FIELD_GET(SMC_ID, smc->cmd_ret) != smc->msg_id) { in apple_smc_write_atomic()
285 dev_err(smc->dev, "Command sequence mismatch (expected %d, got %d)\n", in apple_smc_write_atomic()
286 smc->msg_id, (unsigned int)FIELD_GET(SMC_ID, smc->cmd_ret)); in apple_smc_write_atomic()
290 result = FIELD_GET(SMC_RESULT, smc->cmd_ret); in apple_smc_write_atomic()
294 return FIELD_GET(SMC_SIZE, smc->cmd_ret); in apple_smc_write_atomic()
300 struct apple_smc *smc = cookie; in apple_smc_rtkit_crashed() local
302 smc->boot_stage = APPLE_SMC_ERROR_CRASHED; in apple_smc_rtkit_crashed()
303 dev_err(smc->dev, "SMC crashed! Your system will reboot in a few seconds...\n"); in apple_smc_rtkit_crashed()
308 struct apple_smc *smc = cookie; in apple_smc_rtkit_shmem_setup() local
312 dev_err(smc->dev, "RTKit wants a RAM buffer\n"); in apple_smc_rtkit_shmem_setup()
319 if (bfr->iova < smc->sram->start || bfr->iova > smc->sram->end || in apple_smc_rtkit_shmem_setup()
320 bfr_end > smc->sram->end) { in apple_smc_rtkit_shmem_setup()
321 dev_err(smc->dev, "RTKit buffer request outside SRAM region: [0x%llx, 0x%llx]\n", in apple_smc_rtkit_shmem_setup()
327 bfr->iomem = smc->sram_base + (bfr->iova - smc->sram->start); in apple_smc_rtkit_shmem_setup()
335 struct apple_smc *smc = cookie; in apple_smc_rtkit_recv_early() local
338 dev_warn(smc->dev, "Received message for unknown endpoint 0x%x\n", endpoint); in apple_smc_rtkit_recv_early()
342 if (smc->boot_stage == APPLE_SMC_BOOTING) { in apple_smc_rtkit_recv_early()
345 smc->shmem.iova = message; in apple_smc_rtkit_recv_early()
346 smc->shmem.size = SMC_SHMEM_SIZE; in apple_smc_rtkit_recv_early()
347 ret = apple_smc_rtkit_shmem_setup(smc, &smc->shmem); in apple_smc_rtkit_recv_early()
349 smc->boot_stage = APPLE_SMC_ERROR_NO_SHMEM; in apple_smc_rtkit_recv_early()
350 dev_err(smc->dev, "Failed to initialize shared memory (%d)\n", ret); in apple_smc_rtkit_recv_early()
352 smc->boot_stage = APPLE_SMC_INITIALIZED; in apple_smc_rtkit_recv_early()
354 complete(&smc->init_done); in apple_smc_rtkit_recv_early()
359 smc->cmd_ret = message; in apple_smc_rtkit_recv_early()
360 if (smc->atomic_pending) in apple_smc_rtkit_recv_early()
361 smc->atomic_pending = false; in apple_smc_rtkit_recv_early()
363 complete(&smc->cmd_done); in apple_smc_rtkit_recv_early()
371 struct apple_smc *smc = cookie; in apple_smc_rtkit_recv() local
374 dev_warn(smc->dev, "Received message for unknown endpoint 0x%x\n", endpoint); in apple_smc_rtkit_recv()
379 dev_warn(smc->dev, "Received unknown message from worker: 0x%llx\n", message); in apple_smc_rtkit_recv()
383 blocking_notifier_call_chain(&smc->event_handlers, FIELD_GET(SMC_DATA, message), NULL); in apple_smc_rtkit_recv()
395 struct apple_smc *smc = data; in apple_smc_rtkit_shutdown() local
398 if (apple_rtkit_is_running(smc->rtk)) in apple_smc_rtkit_shutdown()
399 apple_rtkit_quiesce(smc->rtk); in apple_smc_rtkit_shutdown()
404 struct apple_smc *smc = data; in apple_smc_disable_notifications() local
406 apple_smc_write_flag(smc, SMC_KEY(NTAP), false); in apple_smc_disable_notifications()
412 struct apple_smc *smc; in apple_smc_probe() local
416 smc = devm_kzalloc(dev, sizeof(*smc), GFP_KERNEL); in apple_smc_probe()
417 if (!smc) in apple_smc_probe()
420 mutex_init(&smc->mutex); in apple_smc_probe()
421 smc->dev = &pdev->dev; in apple_smc_probe()
422 smc->sram_base = devm_platform_get_and_ioremap_resource(pdev, 1, &smc->sram); in apple_smc_probe()
423 if (IS_ERR(smc->sram_base)) in apple_smc_probe()
424 return dev_err_probe(dev, PTR_ERR(smc->sram_base), "Failed to map SRAM region"); in apple_smc_probe()
426 smc->rtk = devm_apple_rtkit_init(dev, smc, NULL, 0, &apple_smc_rtkit_ops); in apple_smc_probe()
427 if (IS_ERR(smc->rtk)) in apple_smc_probe()
428 return dev_err_probe(dev, PTR_ERR(smc->rtk), "Failed to initialize RTKit"); in apple_smc_probe()
430 smc->boot_stage = APPLE_SMC_BOOTING; in apple_smc_probe()
431 ret = apple_rtkit_wake(smc->rtk); in apple_smc_probe()
435 ret = devm_add_action_or_reset(dev, apple_smc_rtkit_shutdown, smc); in apple_smc_probe()
439 ret = apple_rtkit_start_ep(smc->rtk, SMC_ENDPOINT); in apple_smc_probe()
443 init_completion(&smc->init_done); in apple_smc_probe()
444 init_completion(&smc->cmd_done); in apple_smc_probe()
446 ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT, in apple_smc_probe()
451 if (wait_for_completion_timeout(&smc->init_done, msecs_to_jiffies(SMC_TIMEOUT_MS)) == 0) { in apple_smc_probe()
456 if (smc->boot_stage != APPLE_SMC_INITIALIZED) { in apple_smc_probe()
457 dev_err(dev, "SMC failed to boot successfully, boot stage=%d\n", smc->boot_stage); in apple_smc_probe()
461 dev_set_drvdata(&pdev->dev, smc); in apple_smc_probe()
462 BLOCKING_INIT_NOTIFIER_HEAD(&smc->event_handlers); in apple_smc_probe()
464 ret = apple_smc_read(smc, SMC_KEY(#KEY), &count, sizeof(count)); in apple_smc_probe()
468 return dev_err_probe(smc->dev, ret, "Failed to get key count"); in apple_smc_probe()
469 smc->key_count = be32_to_cpu(count); in apple_smc_probe()
472 apple_smc_write_flag(smc, SMC_KEY(NTAP), true); in apple_smc_probe()
473 ret = devm_add_action_or_reset(dev, apple_smc_disable_notifications, smc); in apple_smc_probe()
477 ret = devm_mfd_add_devices(smc->dev, PLATFORM_DEVID_NONE, in apple_smc_probe()
481 return dev_err_probe(smc->dev, ret, "Failed to register sub-devices"); in apple_smc_probe()