1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
3 * Apple RTKit IPC library
4 * Copyright (C) The Asahi Linux Contributors
7 #include "rtkit-internal.h"
10 APPLE_RTKIT_PWR_STATE_OFF = 0x00, /* power off, cannot be restarted */
11 APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, /* sleeping, can be restarted */
12 APPLE_RTKIT_PWR_STATE_IDLE = 0x201, /* sleeping, retain state */
13 APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, /* running but no communication */
14 APPLE_RTKIT_PWR_STATE_ON = 0x20, /* normal operating state */
18 APPLE_RTKIT_EP_MGMT = 0,
19 APPLE_RTKIT_EP_CRASHLOG = 1,
20 APPLE_RTKIT_EP_SYSLOG = 2,
21 APPLE_RTKIT_EP_DEBUG = 3,
22 APPLE_RTKIT_EP_IOREPORT = 4,
23 APPLE_RTKIT_EP_OSLOG = 8,
26 #define APPLE_RTKIT_MGMT_TYPE GENMASK_ULL(59, 52)
29 APPLE_RTKIT_MGMT_HELLO = 1,
30 APPLE_RTKIT_MGMT_HELLO_REPLY = 2,
31 APPLE_RTKIT_MGMT_STARTEP = 5,
32 APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE = 6,
33 APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE_ACK = 7,
34 APPLE_RTKIT_MGMT_EPMAP = 8,
35 APPLE_RTKIT_MGMT_EPMAP_REPLY = 8,
36 APPLE_RTKIT_MGMT_SET_AP_PWR_STATE = 0xb,
37 APPLE_RTKIT_MGMT_SET_AP_PWR_STATE_ACK = 0xb,
40 #define APPLE_RTKIT_MGMT_HELLO_MINVER GENMASK_ULL(15, 0)
41 #define APPLE_RTKIT_MGMT_HELLO_MAXVER GENMASK_ULL(31, 16)
43 #define APPLE_RTKIT_MGMT_EPMAP_LAST BIT_ULL(51)
44 #define APPLE_RTKIT_MGMT_EPMAP_BASE GENMASK_ULL(34, 32)
45 #define APPLE_RTKIT_MGMT_EPMAP_BITMAP GENMASK_ULL(31, 0)
47 #define APPLE_RTKIT_MGMT_EPMAP_REPLY_MORE BIT_ULL(0)
49 #define APPLE_RTKIT_MGMT_STARTEP_EP GENMASK_ULL(39, 32)
50 #define APPLE_RTKIT_MGMT_STARTEP_FLAG BIT_ULL(1)
52 #define APPLE_RTKIT_MGMT_PWR_STATE GENMASK_ULL(15, 0)
54 #define APPLE_RTKIT_CRASHLOG_CRASH 1
56 #define APPLE_RTKIT_BUFFER_REQUEST 1
57 #define APPLE_RTKIT_BUFFER_REQUEST_SIZE GENMASK_ULL(51, 44)
58 #define APPLE_RTKIT_BUFFER_REQUEST_IOVA GENMASK_ULL(43, 0)
60 #define APPLE_RTKIT_SYSLOG_TYPE GENMASK_ULL(59, 52)
62 #define APPLE_RTKIT_SYSLOG_LOG 5
64 #define APPLE_RTKIT_SYSLOG_INIT 8
65 #define APPLE_RTKIT_SYSLOG_N_ENTRIES GENMASK_ULL(7, 0)
66 #define APPLE_RTKIT_SYSLOG_MSG_SIZE GENMASK_ULL(31, 24)
68 #define APPLE_RTKIT_OSLOG_TYPE GENMASK_ULL(63, 56)
69 #define APPLE_RTKIT_OSLOG_INIT 1
70 #define APPLE_RTKIT_OSLOG_ACK 3
72 #define APPLE_RTKIT_MIN_SUPPORTED_VERSION 11
73 #define APPLE_RTKIT_MAX_SUPPORTED_VERSION 12
75 struct apple_rtkit_msg {
76 struct completion *completion;
77 struct apple_mbox_msg mbox_msg;
80 struct apple_rtkit_rx_work {
81 struct apple_rtkit *rtk;
84 struct work_struct work;
87 bool apple_rtkit_is_running(struct apple_rtkit *rtk)
91 if ((rtk->iop_power_state & 0xff) != APPLE_RTKIT_PWR_STATE_ON)
93 if ((rtk->ap_power_state & 0xff) != APPLE_RTKIT_PWR_STATE_ON)
97 EXPORT_SYMBOL_GPL(apple_rtkit_is_running);
99 bool apple_rtkit_is_crashed(struct apple_rtkit *rtk)
103 EXPORT_SYMBOL_GPL(apple_rtkit_is_crashed);
105 static void apple_rtkit_management_send(struct apple_rtkit *rtk, u8 type,
108 msg &= ~APPLE_RTKIT_MGMT_TYPE;
109 msg |= FIELD_PREP(APPLE_RTKIT_MGMT_TYPE, type);
110 apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_MGMT, msg, NULL, false);
113 static void apple_rtkit_management_rx_hello(struct apple_rtkit *rtk, u64 msg)
117 int min_ver = FIELD_GET(APPLE_RTKIT_MGMT_HELLO_MINVER, msg);
118 int max_ver = FIELD_GET(APPLE_RTKIT_MGMT_HELLO_MAXVER, msg);
119 int want_ver = min(APPLE_RTKIT_MAX_SUPPORTED_VERSION, max_ver);
121 dev_dbg(rtk->dev, "RTKit: Min ver %d, max ver %d\n", min_ver, max_ver);
123 if (min_ver > APPLE_RTKIT_MAX_SUPPORTED_VERSION) {
124 dev_err(rtk->dev, "RTKit: Firmware min version %d is too new\n",
129 if (max_ver < APPLE_RTKIT_MIN_SUPPORTED_VERSION) {
130 dev_err(rtk->dev, "RTKit: Firmware max version %d is too old\n",
135 dev_info(rtk->dev, "RTKit: Initializing (protocol version %d)\n",
137 rtk->version = want_ver;
139 reply = FIELD_PREP(APPLE_RTKIT_MGMT_HELLO_MINVER, want_ver);
140 reply |= FIELD_PREP(APPLE_RTKIT_MGMT_HELLO_MAXVER, want_ver);
141 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_HELLO_REPLY, reply);
146 rtk->boot_result = -EINVAL;
147 complete_all(&rtk->epmap_completion);
150 static void apple_rtkit_management_rx_epmap(struct apple_rtkit *rtk, u64 msg)
154 unsigned long bitmap = FIELD_GET(APPLE_RTKIT_MGMT_EPMAP_BITMAP, msg);
155 u32 base = FIELD_GET(APPLE_RTKIT_MGMT_EPMAP_BASE, msg);
158 "RTKit: received endpoint bitmap 0x%lx with base 0x%x\n",
161 for_each_set_bit(i, &bitmap, 32) {
163 dev_dbg(rtk->dev, "RTKit: Discovered endpoint 0x%02x\n", ep);
164 set_bit(ep, rtk->endpoints);
167 reply = FIELD_PREP(APPLE_RTKIT_MGMT_EPMAP_BASE, base);
168 if (msg & APPLE_RTKIT_MGMT_EPMAP_LAST)
169 reply |= APPLE_RTKIT_MGMT_EPMAP_LAST;
171 reply |= APPLE_RTKIT_MGMT_EPMAP_REPLY_MORE;
173 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_EPMAP_REPLY, reply);
175 if (!(msg & APPLE_RTKIT_MGMT_EPMAP_LAST))
178 for_each_set_bit(ep, rtk->endpoints, APPLE_RTKIT_APP_ENDPOINT_START) {
180 /* the management endpoint is started by default */
181 case APPLE_RTKIT_EP_MGMT:
184 /* without starting these RTKit refuses to boot */
185 case APPLE_RTKIT_EP_SYSLOG:
186 case APPLE_RTKIT_EP_CRASHLOG:
187 case APPLE_RTKIT_EP_DEBUG:
188 case APPLE_RTKIT_EP_IOREPORT:
189 case APPLE_RTKIT_EP_OSLOG:
191 "RTKit: Starting system endpoint 0x%02x\n", ep);
192 apple_rtkit_start_ep(rtk, ep);
197 "RTKit: Unknown system endpoint: 0x%02x\n",
202 rtk->boot_result = 0;
203 complete_all(&rtk->epmap_completion);
206 static void apple_rtkit_management_rx_iop_pwr_ack(struct apple_rtkit *rtk,
209 unsigned int new_state = FIELD_GET(APPLE_RTKIT_MGMT_PWR_STATE, msg);
211 dev_dbg(rtk->dev, "RTKit: IOP power state transition: 0x%x -> 0x%x\n",
212 rtk->iop_power_state, new_state);
213 rtk->iop_power_state = new_state;
215 complete_all(&rtk->iop_pwr_ack_completion);
218 static void apple_rtkit_management_rx_ap_pwr_ack(struct apple_rtkit *rtk,
221 unsigned int new_state = FIELD_GET(APPLE_RTKIT_MGMT_PWR_STATE, msg);
223 dev_dbg(rtk->dev, "RTKit: AP power state transition: 0x%x -> 0x%x\n",
224 rtk->ap_power_state, new_state);
225 rtk->ap_power_state = new_state;
227 complete_all(&rtk->ap_pwr_ack_completion);
230 static void apple_rtkit_management_rx(struct apple_rtkit *rtk, u64 msg)
232 u8 type = FIELD_GET(APPLE_RTKIT_MGMT_TYPE, msg);
235 case APPLE_RTKIT_MGMT_HELLO:
236 apple_rtkit_management_rx_hello(rtk, msg);
238 case APPLE_RTKIT_MGMT_EPMAP:
239 apple_rtkit_management_rx_epmap(rtk, msg);
241 case APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE_ACK:
242 apple_rtkit_management_rx_iop_pwr_ack(rtk, msg);
244 case APPLE_RTKIT_MGMT_SET_AP_PWR_STATE_ACK:
245 apple_rtkit_management_rx_ap_pwr_ack(rtk, msg);
250 "RTKit: unknown management message: 0x%llx (type: 0x%02x)\n",
255 static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk,
256 struct apple_rtkit_shmem *buffer,
259 size_t n_4kpages = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_SIZE, msg);
263 buffer->buffer = NULL;
264 buffer->iomem = NULL;
265 buffer->is_mapped = false;
266 buffer->iova = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_IOVA, msg);
267 buffer->size = n_4kpages << 12;
269 dev_dbg(rtk->dev, "RTKit: buffer request for 0x%zx bytes at %pad\n",
270 buffer->size, &buffer->iova);
273 (!rtk->ops->shmem_setup || !rtk->ops->shmem_destroy)) {
278 if (rtk->ops->shmem_setup) {
279 err = rtk->ops->shmem_setup(rtk->cookie, buffer);
283 buffer->buffer = dma_alloc_coherent(rtk->dev, buffer->size,
284 &buffer->iova, GFP_KERNEL);
285 if (!buffer->buffer) {
291 if (!buffer->is_mapped) {
292 reply = FIELD_PREP(APPLE_RTKIT_SYSLOG_TYPE,
293 APPLE_RTKIT_BUFFER_REQUEST);
294 reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_SIZE, n_4kpages);
295 reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_IOVA,
297 apple_rtkit_send_message(rtk, ep, reply, NULL, false);
303 buffer->buffer = NULL;
304 buffer->iomem = NULL;
307 buffer->is_mapped = false;
311 static void apple_rtkit_free_buffer(struct apple_rtkit *rtk,
312 struct apple_rtkit_shmem *bfr)
317 if (rtk->ops->shmem_destroy)
318 rtk->ops->shmem_destroy(rtk->cookie, bfr);
319 else if (bfr->buffer)
320 dma_free_coherent(rtk->dev, bfr->size, bfr->buffer, bfr->iova);
326 bfr->is_mapped = false;
329 static void apple_rtkit_memcpy(struct apple_rtkit *rtk, void *dst,
330 struct apple_rtkit_shmem *bfr, size_t offset,
334 memcpy_fromio(dst, bfr->iomem + offset, len);
336 memcpy(dst, bfr->buffer + offset, len);
339 static void apple_rtkit_crashlog_rx(struct apple_rtkit *rtk, u64 msg)
341 u8 type = FIELD_GET(APPLE_RTKIT_SYSLOG_TYPE, msg);
344 if (type != APPLE_RTKIT_CRASHLOG_CRASH) {
345 dev_warn(rtk->dev, "RTKit: Unknown crashlog message: %llx\n",
350 if (!rtk->crashlog_buffer.size) {
351 apple_rtkit_common_rx_get_buffer(rtk, &rtk->crashlog_buffer,
352 APPLE_RTKIT_EP_CRASHLOG, msg);
356 dev_err(rtk->dev, "RTKit: co-processor has crashed\n");
359 * create a shadow copy here to make sure the co-processor isn't able
360 * to change the log while we're dumping it. this also ensures
361 * the buffer is in normal memory and not iomem for e.g. the SMC
363 bfr = kzalloc(rtk->crashlog_buffer.size, GFP_KERNEL);
365 apple_rtkit_memcpy(rtk, bfr, &rtk->crashlog_buffer, 0,
366 rtk->crashlog_buffer.size);
367 apple_rtkit_crashlog_dump(rtk, bfr, rtk->crashlog_buffer.size);
371 "RTKit: Couldn't allocate crashlog shadow buffer\n");
375 if (rtk->ops->crashed)
376 rtk->ops->crashed(rtk->cookie);
379 static void apple_rtkit_ioreport_rx(struct apple_rtkit *rtk, u64 msg)
381 u8 type = FIELD_GET(APPLE_RTKIT_SYSLOG_TYPE, msg);
384 case APPLE_RTKIT_BUFFER_REQUEST:
385 apple_rtkit_common_rx_get_buffer(rtk, &rtk->ioreport_buffer,
386 APPLE_RTKIT_EP_IOREPORT, msg);
388 /* unknown, must be ACKed or the co-processor will hang */
391 apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_IOREPORT, msg,
395 dev_warn(rtk->dev, "RTKit: Unknown ioreport message: %llx\n",
400 static void apple_rtkit_syslog_rx_init(struct apple_rtkit *rtk, u64 msg)
402 rtk->syslog_n_entries = FIELD_GET(APPLE_RTKIT_SYSLOG_N_ENTRIES, msg);
403 rtk->syslog_msg_size = FIELD_GET(APPLE_RTKIT_SYSLOG_MSG_SIZE, msg);
405 rtk->syslog_msg_buffer = kzalloc(rtk->syslog_msg_size, GFP_KERNEL);
408 "RTKit: syslog initialized: entries: %zd, msg_size: %zd\n",
409 rtk->syslog_n_entries, rtk->syslog_msg_size);
412 static bool should_crop_syslog_char(char c)
414 return c == '\n' || c == '\r' || c == ' ' || c == '\0';
417 static void apple_rtkit_syslog_rx_log(struct apple_rtkit *rtk, u64 msg)
420 char log_context[24];
421 size_t entry_size = 0x20 + rtk->syslog_msg_size;
424 if (!rtk->syslog_msg_buffer) {
427 "RTKit: received syslog message but no syslog_msg_buffer\n");
430 if (!rtk->syslog_buffer.size) {
433 "RTKit: received syslog message but syslog_buffer.size is zero\n");
436 if (!rtk->syslog_buffer.buffer && !rtk->syslog_buffer.iomem) {
439 "RTKit: received syslog message but no syslog_buffer.buffer or syslog_buffer.iomem\n");
442 if (idx > rtk->syslog_n_entries) {
443 dev_warn(rtk->dev, "RTKit: syslog index %d out of range\n",
448 apple_rtkit_memcpy(rtk, log_context, &rtk->syslog_buffer,
449 idx * entry_size + 8, sizeof(log_context));
450 apple_rtkit_memcpy(rtk, rtk->syslog_msg_buffer, &rtk->syslog_buffer,
451 idx * entry_size + 8 + sizeof(log_context),
452 rtk->syslog_msg_size);
454 log_context[sizeof(log_context) - 1] = 0;
456 msglen = rtk->syslog_msg_size - 1;
458 should_crop_syslog_char(rtk->syslog_msg_buffer[msglen - 1]))
461 rtk->syslog_msg_buffer[msglen] = 0;
462 dev_info(rtk->dev, "RTKit: syslog message: %s: %s\n", log_context,
463 rtk->syslog_msg_buffer);
466 apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_SYSLOG, msg, NULL, false);
469 static void apple_rtkit_syslog_rx(struct apple_rtkit *rtk, u64 msg)
471 u8 type = FIELD_GET(APPLE_RTKIT_SYSLOG_TYPE, msg);
474 case APPLE_RTKIT_BUFFER_REQUEST:
475 apple_rtkit_common_rx_get_buffer(rtk, &rtk->syslog_buffer,
476 APPLE_RTKIT_EP_SYSLOG, msg);
478 case APPLE_RTKIT_SYSLOG_INIT:
479 apple_rtkit_syslog_rx_init(rtk, msg);
481 case APPLE_RTKIT_SYSLOG_LOG:
482 apple_rtkit_syslog_rx_log(rtk, msg);
485 dev_warn(rtk->dev, "RTKit: Unknown syslog message: %llx\n",
490 static void apple_rtkit_oslog_rx_init(struct apple_rtkit *rtk, u64 msg)
494 dev_dbg(rtk->dev, "RTKit: oslog init: msg: 0x%llx\n", msg);
495 ack = FIELD_PREP(APPLE_RTKIT_OSLOG_TYPE, APPLE_RTKIT_OSLOG_ACK);
496 apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_OSLOG, ack, NULL, false);
499 static void apple_rtkit_oslog_rx(struct apple_rtkit *rtk, u64 msg)
501 u8 type = FIELD_GET(APPLE_RTKIT_OSLOG_TYPE, msg);
504 case APPLE_RTKIT_OSLOG_INIT:
505 apple_rtkit_oslog_rx_init(rtk, msg);
508 dev_warn(rtk->dev, "RTKit: Unknown oslog message: %llx\n", msg);
512 static void apple_rtkit_rx_work(struct work_struct *work)
514 struct apple_rtkit_rx_work *rtk_work =
515 container_of(work, struct apple_rtkit_rx_work, work);
516 struct apple_rtkit *rtk = rtk_work->rtk;
518 switch (rtk_work->ep) {
519 case APPLE_RTKIT_EP_MGMT:
520 apple_rtkit_management_rx(rtk, rtk_work->msg);
522 case APPLE_RTKIT_EP_CRASHLOG:
523 apple_rtkit_crashlog_rx(rtk, rtk_work->msg);
525 case APPLE_RTKIT_EP_SYSLOG:
526 apple_rtkit_syslog_rx(rtk, rtk_work->msg);
528 case APPLE_RTKIT_EP_IOREPORT:
529 apple_rtkit_ioreport_rx(rtk, rtk_work->msg);
531 case APPLE_RTKIT_EP_OSLOG:
532 apple_rtkit_oslog_rx(rtk, rtk_work->msg);
534 case APPLE_RTKIT_APP_ENDPOINT_START ... 0xff:
535 if (rtk->ops->recv_message)
536 rtk->ops->recv_message(rtk->cookie, rtk_work->ep,
541 "Received unexpected message to EP%02d: %llx\n",
542 rtk_work->ep, rtk_work->msg);
546 "RTKit: message to unknown endpoint %02x: %llx\n",
547 rtk_work->ep, rtk_work->msg);
553 static void apple_rtkit_rx(struct mbox_client *cl, void *mssg)
555 struct apple_rtkit *rtk = container_of(cl, struct apple_rtkit, mbox_cl);
556 struct apple_mbox_msg *msg = mssg;
557 struct apple_rtkit_rx_work *work;
561 * The message was read from a MMIO FIFO and we have to make
562 * sure all reads from buffers sent with that message happen
567 if (!test_bit(ep, rtk->endpoints))
569 "RTKit: Message to undiscovered endpoint 0x%02x\n",
572 if (ep >= APPLE_RTKIT_APP_ENDPOINT_START &&
573 rtk->ops->recv_message_early &&
574 rtk->ops->recv_message_early(rtk->cookie, ep, msg->msg0))
577 work = kzalloc(sizeof(*work), GFP_ATOMIC);
583 work->msg = msg->msg0;
584 INIT_WORK(&work->work, apple_rtkit_rx_work);
585 queue_work(rtk->wq, &work->work);
588 static void apple_rtkit_tx_done(struct mbox_client *cl, void *mssg, int r)
590 struct apple_rtkit_msg *msg =
591 container_of(mssg, struct apple_rtkit_msg, mbox_msg);
597 complete(msg->completion);
601 int apple_rtkit_send_message(struct apple_rtkit *rtk, u8 ep, u64 message,
602 struct completion *completion, bool atomic)
604 struct apple_rtkit_msg *msg;
610 if (ep >= APPLE_RTKIT_APP_ENDPOINT_START &&
611 !apple_rtkit_is_running(rtk))
619 msg = kzalloc(sizeof(*msg), flags);
623 msg->mbox_msg.msg0 = message;
624 msg->mbox_msg.msg1 = ep;
625 msg->completion = completion;
628 * The message will be sent with a MMIO write. We need the barrier
629 * here to ensure any previous writes to buffers are visible to the
630 * device before that MMIO write happens.
634 ret = mbox_send_message(rtk->mbox_chan, &msg->mbox_msg);
642 EXPORT_SYMBOL_GPL(apple_rtkit_send_message);
644 int apple_rtkit_send_message_wait(struct apple_rtkit *rtk, u8 ep, u64 message,
645 unsigned long timeout, bool atomic)
647 DECLARE_COMPLETION_ONSTACK(completion);
651 ret = apple_rtkit_send_message(rtk, ep, message, &completion, atomic);
656 ret = mbox_flush(rtk->mbox_chan, timeout);
660 if (try_wait_for_completion(&completion))
665 t = wait_for_completion_interruptible_timeout(
666 &completion, msecs_to_jiffies(timeout));
674 EXPORT_SYMBOL_GPL(apple_rtkit_send_message_wait);
676 int apple_rtkit_poll(struct apple_rtkit *rtk)
678 return mbox_client_peek_data(rtk->mbox_chan);
680 EXPORT_SYMBOL_GPL(apple_rtkit_poll);
682 int apple_rtkit_start_ep(struct apple_rtkit *rtk, u8 endpoint)
686 if (!test_bit(endpoint, rtk->endpoints))
688 if (endpoint >= APPLE_RTKIT_APP_ENDPOINT_START &&
689 !apple_rtkit_is_running(rtk))
692 msg = FIELD_PREP(APPLE_RTKIT_MGMT_STARTEP_EP, endpoint);
693 msg |= APPLE_RTKIT_MGMT_STARTEP_FLAG;
694 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_STARTEP, msg);
698 EXPORT_SYMBOL_GPL(apple_rtkit_start_ep);
700 static int apple_rtkit_request_mbox_chan(struct apple_rtkit *rtk)
703 rtk->mbox_chan = mbox_request_channel_byname(&rtk->mbox_cl,
707 mbox_request_channel(&rtk->mbox_cl, rtk->mbox_idx);
709 if (IS_ERR(rtk->mbox_chan))
710 return PTR_ERR(rtk->mbox_chan);
714 struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
715 const char *mbox_name, int mbox_idx,
716 const struct apple_rtkit_ops *ops)
718 struct apple_rtkit *rtk;
722 return ERR_PTR(-EINVAL);
724 rtk = kzalloc(sizeof(*rtk), GFP_KERNEL);
726 return ERR_PTR(-ENOMEM);
729 rtk->cookie = cookie;
732 init_completion(&rtk->epmap_completion);
733 init_completion(&rtk->iop_pwr_ack_completion);
734 init_completion(&rtk->ap_pwr_ack_completion);
736 bitmap_zero(rtk->endpoints, APPLE_RTKIT_MAX_ENDPOINTS);
737 set_bit(APPLE_RTKIT_EP_MGMT, rtk->endpoints);
739 rtk->mbox_name = mbox_name;
740 rtk->mbox_idx = mbox_idx;
741 rtk->mbox_cl.dev = dev;
742 rtk->mbox_cl.tx_block = false;
743 rtk->mbox_cl.knows_txdone = false;
744 rtk->mbox_cl.rx_callback = &apple_rtkit_rx;
745 rtk->mbox_cl.tx_done = &apple_rtkit_tx_done;
747 rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_MEM_RECLAIM,
754 ret = apple_rtkit_request_mbox_chan(rtk);
761 destroy_workqueue(rtk->wq);
766 EXPORT_SYMBOL_GPL(apple_rtkit_init);
768 static int apple_rtkit_wait_for_completion(struct completion *c)
772 t = wait_for_completion_interruptible_timeout(c,
773 msecs_to_jiffies(1000));
782 int apple_rtkit_reinit(struct apple_rtkit *rtk)
784 /* make sure we don't handle any messages while reinitializing */
785 mbox_free_channel(rtk->mbox_chan);
786 flush_workqueue(rtk->wq);
788 apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer);
789 apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer);
790 apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer);
792 kfree(rtk->syslog_msg_buffer);
794 rtk->syslog_msg_buffer = NULL;
795 rtk->syslog_n_entries = 0;
796 rtk->syslog_msg_size = 0;
798 bitmap_zero(rtk->endpoints, APPLE_RTKIT_MAX_ENDPOINTS);
799 set_bit(APPLE_RTKIT_EP_MGMT, rtk->endpoints);
801 reinit_completion(&rtk->epmap_completion);
802 reinit_completion(&rtk->iop_pwr_ack_completion);
803 reinit_completion(&rtk->ap_pwr_ack_completion);
805 rtk->crashed = false;
806 rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_OFF;
807 rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_OFF;
809 return apple_rtkit_request_mbox_chan(rtk);
811 EXPORT_SYMBOL_GPL(apple_rtkit_reinit);
813 static int apple_rtkit_set_ap_power_state(struct apple_rtkit *rtk,
819 reinit_completion(&rtk->ap_pwr_ack_completion);
821 msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, state);
822 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_AP_PWR_STATE,
825 ret = apple_rtkit_wait_for_completion(&rtk->ap_pwr_ack_completion);
829 if (rtk->ap_power_state != state)
834 static int apple_rtkit_set_iop_power_state(struct apple_rtkit *rtk,
840 reinit_completion(&rtk->iop_pwr_ack_completion);
842 msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, state);
843 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
846 ret = apple_rtkit_wait_for_completion(&rtk->iop_pwr_ack_completion);
850 if (rtk->iop_power_state != state)
855 int apple_rtkit_boot(struct apple_rtkit *rtk)
859 if (apple_rtkit_is_running(rtk))
864 dev_dbg(rtk->dev, "RTKit: waiting for boot to finish\n");
865 ret = apple_rtkit_wait_for_completion(&rtk->epmap_completion);
868 if (rtk->boot_result)
869 return rtk->boot_result;
871 dev_dbg(rtk->dev, "RTKit: waiting for IOP power state ACK\n");
872 ret = apple_rtkit_wait_for_completion(&rtk->iop_pwr_ack_completion);
876 return apple_rtkit_set_ap_power_state(rtk, APPLE_RTKIT_PWR_STATE_ON);
878 EXPORT_SYMBOL_GPL(apple_rtkit_boot);
880 int apple_rtkit_shutdown(struct apple_rtkit *rtk)
884 /* if OFF is used here the co-processor will not wake up again */
885 ret = apple_rtkit_set_ap_power_state(rtk,
886 APPLE_RTKIT_PWR_STATE_QUIESCED);
890 ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_SLEEP);
894 return apple_rtkit_reinit(rtk);
896 EXPORT_SYMBOL_GPL(apple_rtkit_shutdown);
898 int apple_rtkit_idle(struct apple_rtkit *rtk)
902 /* if OFF is used here the co-processor will not wake up again */
903 ret = apple_rtkit_set_ap_power_state(rtk,
904 APPLE_RTKIT_PWR_STATE_IDLE);
908 ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_IDLE);
912 rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_IDLE;
913 rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_IDLE;
916 EXPORT_SYMBOL_GPL(apple_rtkit_idle);
918 int apple_rtkit_quiesce(struct apple_rtkit *rtk)
922 ret = apple_rtkit_set_ap_power_state(rtk,
923 APPLE_RTKIT_PWR_STATE_QUIESCED);
927 ret = apple_rtkit_set_iop_power_state(rtk,
928 APPLE_RTKIT_PWR_STATE_QUIESCED);
932 ret = apple_rtkit_reinit(rtk);
936 rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_QUIESCED;
937 rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_QUIESCED;
940 EXPORT_SYMBOL_GPL(apple_rtkit_quiesce);
942 int apple_rtkit_wake(struct apple_rtkit *rtk)
946 if (apple_rtkit_is_running(rtk))
949 reinit_completion(&rtk->iop_pwr_ack_completion);
952 * Use open-coded apple_rtkit_set_iop_power_state since apple_rtkit_boot
953 * will wait for the completion anyway.
955 msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, APPLE_RTKIT_PWR_STATE_ON);
956 apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
959 return apple_rtkit_boot(rtk);
961 EXPORT_SYMBOL_GPL(apple_rtkit_wake);
963 void apple_rtkit_free(struct apple_rtkit *rtk)
965 mbox_free_channel(rtk->mbox_chan);
966 destroy_workqueue(rtk->wq);
968 apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer);
969 apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer);
970 apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer);
972 kfree(rtk->syslog_msg_buffer);
975 EXPORT_SYMBOL_GPL(apple_rtkit_free);
977 static void apple_rtkit_free_wrapper(void *data)
979 apple_rtkit_free(data);
982 struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie,
983 const char *mbox_name, int mbox_idx,
984 const struct apple_rtkit_ops *ops)
986 struct apple_rtkit *rtk;
989 rtk = apple_rtkit_init(dev, cookie, mbox_name, mbox_idx, ops);
993 ret = devm_add_action_or_reset(dev, apple_rtkit_free_wrapper, rtk);
999 EXPORT_SYMBOL_GPL(devm_apple_rtkit_init);
1001 MODULE_LICENSE("Dual MIT/GPL");
1002 MODULE_AUTHOR("Sven Peter <sven@svenpeter.dev>");
1003 MODULE_DESCRIPTION("Apple RTKit driver");