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path: root/drivers/soc/apple/rtkit.c
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Diffstat (limited to 'drivers/soc/apple/rtkit.c')
-rw-r--r--drivers/soc/apple/rtkit.c112
1 files changed, 75 insertions, 37 deletions
diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c
index e6d940292c9f..5fffd0f003dc 100644
--- a/drivers/soc/apple/rtkit.c
+++ b/drivers/soc/apple/rtkit.c
@@ -12,6 +12,7 @@ enum {
APPLE_RTKIT_PWR_STATE_IDLE = 0x201, /* sleeping, retain state */
APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, /* running but no communication */
APPLE_RTKIT_PWR_STATE_ON = 0x20, /* normal operating state */
+ APPLE_RTKIT_PWR_STATE_INIT = 0x220, /* init after starting the coproc */
};
enum {
@@ -66,8 +67,9 @@ enum {
#define APPLE_RTKIT_SYSLOG_MSG_SIZE GENMASK_ULL(31, 24)
#define APPLE_RTKIT_OSLOG_TYPE GENMASK_ULL(63, 56)
-#define APPLE_RTKIT_OSLOG_INIT 1
-#define APPLE_RTKIT_OSLOG_ACK 3
+#define APPLE_RTKIT_OSLOG_BUFFER_REQUEST 1
+#define APPLE_RTKIT_OSLOG_SIZE GENMASK_ULL(55, 36)
+#define APPLE_RTKIT_OSLOG_IOVA GENMASK_ULL(35, 0)
#define APPLE_RTKIT_MIN_SUPPORTED_VERSION 11
#define APPLE_RTKIT_MAX_SUPPORTED_VERSION 12
@@ -97,12 +99,19 @@ bool apple_rtkit_is_crashed(struct apple_rtkit *rtk)
}
EXPORT_SYMBOL_GPL(apple_rtkit_is_crashed);
-static void apple_rtkit_management_send(struct apple_rtkit *rtk, u8 type,
+static int apple_rtkit_management_send(struct apple_rtkit *rtk, u8 type,
u64 msg)
{
+ int ret;
+
msg &= ~APPLE_RTKIT_MGMT_TYPE;
msg |= FIELD_PREP(APPLE_RTKIT_MGMT_TYPE, type);
- apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_MGMT, msg, NULL, false);
+ ret = apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_MGMT, msg, NULL, false);
+
+ if (ret)
+ dev_err(rtk->dev, "RTKit: Failed to send management message: %d\n", ret);
+
+ return ret;
}
static void apple_rtkit_management_rx_hello(struct apple_rtkit *rtk, u64 msg)
@@ -251,15 +260,21 @@ static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk,
struct apple_rtkit_shmem *buffer,
u8 ep, u64 msg)
{
- size_t n_4kpages = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_SIZE, msg);
u64 reply;
int err;
+ /* The different size vs. IOVA shifts look odd but are indeed correct this way */
+ if (ep == APPLE_RTKIT_EP_OSLOG) {
+ buffer->size = FIELD_GET(APPLE_RTKIT_OSLOG_SIZE, msg);
+ buffer->iova = FIELD_GET(APPLE_RTKIT_OSLOG_IOVA, msg) << 12;
+ } else {
+ buffer->size = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_SIZE, msg) << 12;
+ buffer->iova = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_IOVA, msg);
+ }
+
buffer->buffer = NULL;
buffer->iomem = NULL;
buffer->is_mapped = false;
- buffer->iova = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_IOVA, msg);
- buffer->size = n_4kpages << 12;
dev_dbg(rtk->dev, "RTKit: buffer request for 0x%zx bytes at %pad\n",
buffer->size, &buffer->iova);
@@ -284,17 +299,30 @@ static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk,
}
if (!buffer->is_mapped) {
- reply = FIELD_PREP(APPLE_RTKIT_SYSLOG_TYPE,
- APPLE_RTKIT_BUFFER_REQUEST);
- reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_SIZE, n_4kpages);
- reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_IOVA,
- buffer->iova);
+ /* oslog uses different fields and needs a shifted IOVA instead of size */
+ if (ep == APPLE_RTKIT_EP_OSLOG) {
+ reply = FIELD_PREP(APPLE_RTKIT_OSLOG_TYPE,
+ APPLE_RTKIT_OSLOG_BUFFER_REQUEST);
+ reply |= FIELD_PREP(APPLE_RTKIT_OSLOG_SIZE, buffer->size);
+ reply |= FIELD_PREP(APPLE_RTKIT_OSLOG_IOVA,
+ buffer->iova >> 12);
+ } else {
+ reply = FIELD_PREP(APPLE_RTKIT_SYSLOG_TYPE,
+ APPLE_RTKIT_BUFFER_REQUEST);
+ reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_SIZE,
+ buffer->size >> 12);
+ reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_IOVA,
+ buffer->iova);
+ }
apple_rtkit_send_message(rtk, ep, reply, NULL, false);
}
return 0;
error:
+ dev_err(rtk->dev, "RTKit: failed buffer request for 0x%zx bytes (%d)\n",
+ buffer->size, err);
+
buffer->buffer = NULL;
buffer->iomem = NULL;
buffer->iova = 0;
@@ -360,7 +388,6 @@ static void apple_rtkit_crashlog_rx(struct apple_rtkit *rtk, u64 msg)
apple_rtkit_memcpy(rtk, bfr, &rtk->crashlog_buffer, 0,
rtk->crashlog_buffer.size);
apple_rtkit_crashlog_dump(rtk, bfr, rtk->crashlog_buffer.size);
- kfree(bfr);
} else {
dev_err(rtk->dev,
"RTKit: Couldn't allocate crashlog shadow buffer\n");
@@ -368,7 +395,9 @@ static void apple_rtkit_crashlog_rx(struct apple_rtkit *rtk, u64 msg)
rtk->crashed = true;
if (rtk->ops->crashed)
- rtk->ops->crashed(rtk->cookie);
+ rtk->ops->crashed(rtk->cookie, bfr, rtk->crashlog_buffer.size);
+
+ kfree(bfr);
}
static void apple_rtkit_ioreport_rx(struct apple_rtkit *rtk, u64 msg)
@@ -448,7 +477,7 @@ static void apple_rtkit_syslog_rx_log(struct apple_rtkit *rtk, u64 msg)
log_context[sizeof(log_context) - 1] = 0;
- msglen = rtk->syslog_msg_size - 1;
+ msglen = strnlen(rtk->syslog_msg_buffer, rtk->syslog_msg_size - 1);
while (msglen > 0 &&
should_crop_syslog_char(rtk->syslog_msg_buffer[msglen - 1]))
msglen--;
@@ -482,25 +511,18 @@ static void apple_rtkit_syslog_rx(struct apple_rtkit *rtk, u64 msg)
}
}
-static void apple_rtkit_oslog_rx_init(struct apple_rtkit *rtk, u64 msg)
-{
- u64 ack;
-
- dev_dbg(rtk->dev, "RTKit: oslog init: msg: 0x%llx\n", msg);
- ack = FIELD_PREP(APPLE_RTKIT_OSLOG_TYPE, APPLE_RTKIT_OSLOG_ACK);
- apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_OSLOG, ack, NULL, false);
-}
-
static void apple_rtkit_oslog_rx(struct apple_rtkit *rtk, u64 msg)
{
u8 type = FIELD_GET(APPLE_RTKIT_OSLOG_TYPE, msg);
switch (type) {
- case APPLE_RTKIT_OSLOG_INIT:
- apple_rtkit_oslog_rx_init(rtk, msg);
+ case APPLE_RTKIT_OSLOG_BUFFER_REQUEST:
+ apple_rtkit_common_rx_get_buffer(rtk, &rtk->oslog_buffer,
+ APPLE_RTKIT_EP_OSLOG, msg);
break;
default:
- dev_warn(rtk->dev, "RTKit: Unknown oslog message: %llx\n", msg);
+ dev_warn(rtk->dev, "RTKit: Unknown oslog message: %llx\n",
+ msg);
}
}
@@ -588,11 +610,18 @@ int apple_rtkit_send_message(struct apple_rtkit *rtk, u8 ep, u64 message,
.msg1 = ep,
};
- if (rtk->crashed)
+ if (rtk->crashed) {
+ dev_warn(rtk->dev,
+ "RTKit: Device is crashed, cannot send message\n");
return -EINVAL;
+ }
+
if (ep >= APPLE_RTKIT_APP_ENDPOINT_START &&
- !apple_rtkit_is_running(rtk))
+ !apple_rtkit_is_running(rtk)) {
+ dev_warn(rtk->dev,
+ "RTKit: Endpoint 0x%02x is not running, cannot send message\n", ep);
return -EINVAL;
+ }
/*
* The message will be sent with a MMIO write. We need the barrier
@@ -667,7 +696,7 @@ struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
rtk->mbox->rx = apple_rtkit_rx;
rtk->mbox->cookie = rtk;
- rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_MEM_RECLAIM,
+ rtk->wq = alloc_ordered_workqueue("rtkit-%s", WQ_HIGHPRI | WQ_MEM_RECLAIM,
dev_name(rtk->dev));
if (!rtk->wq) {
ret = -ENOMEM;
@@ -710,6 +739,7 @@ int apple_rtkit_reinit(struct apple_rtkit *rtk)
apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer);
apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer);
+ apple_rtkit_free_buffer(rtk, &rtk->oslog_buffer);
apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer);
kfree(rtk->syslog_msg_buffer);
@@ -742,8 +772,10 @@ static int apple_rtkit_set_ap_power_state(struct apple_rtkit *rtk,
reinit_completion(&rtk->ap_pwr_ack_completion);
msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, state);
- apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_AP_PWR_STATE,
- msg);
+ ret = apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_AP_PWR_STATE,
+ msg);
+ if (ret)
+ return ret;
ret = apple_rtkit_wait_for_completion(&rtk->ap_pwr_ack_completion);
if (ret)
@@ -763,8 +795,10 @@ static int apple_rtkit_set_iop_power_state(struct apple_rtkit *rtk,
reinit_completion(&rtk->iop_pwr_ack_completion);
msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, state);
- apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
- msg);
+ ret = apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
+ msg);
+ if (ret)
+ return ret;
ret = apple_rtkit_wait_for_completion(&rtk->iop_pwr_ack_completion);
if (ret)
@@ -865,6 +899,7 @@ EXPORT_SYMBOL_GPL(apple_rtkit_quiesce);
int apple_rtkit_wake(struct apple_rtkit *rtk)
{
u64 msg;
+ int ret;
if (apple_rtkit_is_running(rtk))
return -EINVAL;
@@ -875,9 +910,11 @@ int apple_rtkit_wake(struct apple_rtkit *rtk)
* Use open-coded apple_rtkit_set_iop_power_state since apple_rtkit_boot
* will wait for the completion anyway.
*/
- msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, APPLE_RTKIT_PWR_STATE_ON);
- apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
- msg);
+ msg = FIELD_PREP(APPLE_RTKIT_MGMT_PWR_STATE, APPLE_RTKIT_PWR_STATE_INIT);
+ ret = apple_rtkit_management_send(rtk, APPLE_RTKIT_MGMT_SET_IOP_PWR_STATE,
+ msg);
+ if (ret)
+ return ret;
return apple_rtkit_boot(rtk);
}
@@ -890,6 +927,7 @@ void apple_rtkit_free(struct apple_rtkit *rtk)
apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer);
apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer);
+ apple_rtkit_free_buffer(rtk, &rtk->oslog_buffer);
apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer);
kfree(rtk->syslog_msg_buffer);
generated by cgit v1.2.3 (git 2.46.0) at 2025-04-28 05:10:34 +0000