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-rw-r--r--drivers/soc/apple/apple-pmgr-pwrstate.c11
-rw-r--r--drivers/soc/apple/rtkit-crashlog.c93
-rw-r--r--drivers/soc/apple/rtkit.c36
-rw-r--r--include/linux/soc/apple/rtkit.h26
4 files changed, 157 insertions, 9 deletions
diff --git a/drivers/soc/apple/apple-pmgr-pwrstate.c b/drivers/soc/apple/apple-pmgr-pwrstate.c
index e1122288409a..a3e2bc1d2686 100644
--- a/drivers/soc/apple/apple-pmgr-pwrstate.c
+++ b/drivers/soc/apple/apple-pmgr-pwrstate.c
@@ -116,8 +116,9 @@ static int apple_pmgr_ps_power_off(struct generic_pm_domain *genpd)
static int apple_pmgr_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
{
struct apple_pmgr_ps *ps = rcdev_to_apple_pmgr_ps(rcdev);
+ unsigned long flags;
- mutex_lock(&ps->genpd.mlock);
+ spin_lock_irqsave(&ps->genpd.slock, flags);
if (ps->genpd.status == GENPD_STATE_OFF)
dev_err(ps->dev, "PS 0x%x: asserting RESET while powered down\n", ps->offset);
@@ -129,7 +130,7 @@ static int apple_pmgr_reset_assert(struct reset_controller_dev *rcdev, unsigned
regmap_update_bits(ps->regmap, ps->offset, APPLE_PMGR_FLAGS | APPLE_PMGR_RESET,
APPLE_PMGR_RESET);
- mutex_unlock(&ps->genpd.mlock);
+ spin_unlock_irqrestore(&ps->genpd.slock, flags);
return 0;
}
@@ -137,8 +138,9 @@ static int apple_pmgr_reset_assert(struct reset_controller_dev *rcdev, unsigned
static int apple_pmgr_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
{
struct apple_pmgr_ps *ps = rcdev_to_apple_pmgr_ps(rcdev);
+ unsigned long flags;
- mutex_lock(&ps->genpd.mlock);
+ spin_lock_irqsave(&ps->genpd.slock, flags);
dev_dbg(ps->dev, "PS 0x%x: deassert reset\n", ps->offset);
regmap_update_bits(ps->regmap, ps->offset, APPLE_PMGR_FLAGS | APPLE_PMGR_RESET, 0);
@@ -147,7 +149,7 @@ static int apple_pmgr_reset_deassert(struct reset_controller_dev *rcdev, unsigne
if (ps->genpd.status == GENPD_STATE_OFF)
dev_err(ps->dev, "PS 0x%x: RESET was deasserted while powered down\n", ps->offset);
- mutex_unlock(&ps->genpd.mlock);
+ spin_unlock_irqrestore(&ps->genpd.slock, flags);
return 0;
}
@@ -222,6 +224,7 @@ static int apple_pmgr_ps_probe(struct platform_device *pdev)
return ret;
}
+ ps->genpd.flags |= GENPD_FLAG_IRQ_SAFE;
ps->genpd.name = name;
ps->genpd.power_on = apple_pmgr_ps_power_on;
ps->genpd.power_off = apple_pmgr_ps_power_off;
diff --git a/drivers/soc/apple/rtkit-crashlog.c b/drivers/soc/apple/rtkit-crashlog.c
index 732deed64660..dfa74b32eda2 100644
--- a/drivers/soc/apple/rtkit-crashlog.c
+++ b/drivers/soc/apple/rtkit-crashlog.c
@@ -13,6 +13,17 @@
#define APPLE_RTKIT_CRASHLOG_VERSION FOURCC('C', 'v', 'e', 'r')
#define APPLE_RTKIT_CRASHLOG_MBOX FOURCC('C', 'm', 'b', 'x')
#define APPLE_RTKIT_CRASHLOG_TIME FOURCC('C', 't', 'i', 'm')
+#define APPLE_RTKIT_CRASHLOG_REGS FOURCC('C', 'r', 'g', '8')
+
+/* For COMPILE_TEST on non-ARM64 architectures */
+#ifndef PSR_MODE_EL0t
+#define PSR_MODE_EL0t 0x00000000
+#define PSR_MODE_EL1t 0x00000004
+#define PSR_MODE_EL1h 0x00000005
+#define PSR_MODE_EL2t 0x00000008
+#define PSR_MODE_EL2h 0x00000009
+#define PSR_MODE_MASK 0x0000000f
+#endif
struct apple_rtkit_crashlog_header {
u32 fourcc;
@@ -31,6 +42,24 @@ struct apple_rtkit_crashlog_mbox_entry {
};
static_assert(sizeof(struct apple_rtkit_crashlog_mbox_entry) == 0x18);
+struct apple_rtkit_crashlog_regs {
+ u32 unk_0;
+ u32 unk_4;
+ u64 regs[31];
+ u64 sp;
+ u64 pc;
+ u64 psr;
+ u64 cpacr;
+ u64 fpsr;
+ u64 fpcr;
+ u64 unk[64];
+ u64 far;
+ u64 unk_X;
+ u64 esr;
+ u64 unk_Z;
+};
+static_assert(sizeof(struct apple_rtkit_crashlog_regs) == 0x350);
+
static void apple_rtkit_crashlog_dump_str(struct apple_rtkit *rtk, u8 *bfr,
size_t size)
{
@@ -94,6 +123,66 @@ static void apple_rtkit_crashlog_dump_mailbox(struct apple_rtkit *rtk, u8 *bfr,
}
}
+static void apple_rtkit_crashlog_dump_regs(struct apple_rtkit *rtk, u8 *bfr,
+ size_t size)
+{
+ struct apple_rtkit_crashlog_regs regs;
+ const char *el;
+ int i;
+
+ if (size < sizeof(regs)) {
+ dev_warn(rtk->dev, "RTKit: Regs section too small: 0x%zx", size);
+ return;
+ }
+
+ memcpy(&regs, bfr, sizeof(regs));
+
+ switch (regs.psr & PSR_MODE_MASK) {
+ case PSR_MODE_EL0t:
+ el = "EL0t";
+ break;
+ case PSR_MODE_EL1t:
+ el = "EL1t";
+ break;
+ case PSR_MODE_EL1h:
+ el = "EL1h";
+ break;
+ case PSR_MODE_EL2t:
+ el = "EL2t";
+ break;
+ case PSR_MODE_EL2h:
+ el = "EL2h";
+ break;
+ default:
+ el = "unknown";
+ break;
+ }
+
+ dev_warn(rtk->dev, "RTKit: Exception dump:");
+ dev_warn(rtk->dev, " == Exception taken from %s ==", el);
+ dev_warn(rtk->dev, " PSR = 0x%llx", regs.psr);
+ dev_warn(rtk->dev, " PC = 0x%llx\n", regs.pc);
+ dev_warn(rtk->dev, " ESR = 0x%llx\n", regs.esr);
+ dev_warn(rtk->dev, " FAR = 0x%llx\n", regs.far);
+ dev_warn(rtk->dev, " SP = 0x%llx\n", regs.sp);
+ dev_warn(rtk->dev, "\n");
+
+ for (i = 0; i < 31; i += 4) {
+ if (i < 28)
+ dev_warn(rtk->dev,
+ " x%02d-x%02d = %016llx %016llx %016llx %016llx\n",
+ i, i + 3,
+ regs.regs[i], regs.regs[i + 1],
+ regs.regs[i + 2], regs.regs[i + 3]);
+ else
+ dev_warn(rtk->dev,
+ " x%02d-x%02d = %016llx %016llx %016llx\n", i, i + 3,
+ regs.regs[i], regs.regs[i + 1], regs.regs[i + 2]);
+ }
+
+ dev_warn(rtk->dev, "\n");
+}
+
void apple_rtkit_crashlog_dump(struct apple_rtkit *rtk, u8 *bfr, size_t size)
{
size_t offset;
@@ -140,6 +229,10 @@ void apple_rtkit_crashlog_dump(struct apple_rtkit *rtk, u8 *bfr, size_t size)
apple_rtkit_crashlog_dump_time(rtk, bfr + offset + 16,
section_size);
break;
+ case APPLE_RTKIT_CRASHLOG_REGS:
+ apple_rtkit_crashlog_dump_regs(rtk, bfr + offset + 16,
+ section_size);
+ break;
default:
dev_warn(rtk->dev,
"RTKit: Unknown crashlog section: %x",
diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c
index 8ec74d7539eb..35ec35aa500d 100644
--- a/drivers/soc/apple/rtkit.c
+++ b/drivers/soc/apple/rtkit.c
@@ -9,6 +9,7 @@
enum {
APPLE_RTKIT_PWR_STATE_OFF = 0x00, /* power off, cannot be restarted */
APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, /* sleeping, can be restarted */
+ 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 */
};
@@ -698,7 +699,7 @@ static int apple_rtkit_request_mbox_chan(struct apple_rtkit *rtk)
return 0;
}
-static struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
+struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
const char *mbox_name, int mbox_idx,
const struct apple_rtkit_ops *ops)
{
@@ -750,6 +751,7 @@ free_rtk:
kfree(rtk);
return ERR_PTR(ret);
}
+EXPORT_SYMBOL_GPL(apple_rtkit_init);
static int apple_rtkit_wait_for_completion(struct completion *c)
{
@@ -881,6 +883,26 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk)
}
EXPORT_SYMBOL_GPL(apple_rtkit_shutdown);
+int apple_rtkit_idle(struct apple_rtkit *rtk)
+{
+ int ret;
+
+ /* if OFF is used here the co-processor will not wake up again */
+ ret = apple_rtkit_set_ap_power_state(rtk,
+ APPLE_RTKIT_PWR_STATE_IDLE);
+ if (ret)
+ return ret;
+
+ ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_IDLE);
+ if (ret)
+ return ret;
+
+ rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_IDLE;
+ rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_IDLE;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(apple_rtkit_idle);
+
int apple_rtkit_quiesce(struct apple_rtkit *rtk)
{
int ret;
@@ -926,10 +948,8 @@ int apple_rtkit_wake(struct apple_rtkit *rtk)
}
EXPORT_SYMBOL_GPL(apple_rtkit_wake);
-static void apple_rtkit_free(void *data)
+void apple_rtkit_free(struct apple_rtkit *rtk)
{
- struct apple_rtkit *rtk = data;
-
mbox_free_channel(rtk->mbox_chan);
destroy_workqueue(rtk->wq);
@@ -940,6 +960,12 @@ static void apple_rtkit_free(void *data)
kfree(rtk->syslog_msg_buffer);
kfree(rtk);
}
+EXPORT_SYMBOL_GPL(apple_rtkit_free);
+
+static void apple_rtkit_free_wrapper(void *data)
+{
+ apple_rtkit_free(data);
+}
struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie,
const char *mbox_name, int mbox_idx,
@@ -952,7 +978,7 @@ struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie,
if (IS_ERR(rtk))
return rtk;
- ret = devm_add_action_or_reset(dev, apple_rtkit_free, rtk);
+ ret = devm_add_action_or_reset(dev, apple_rtkit_free_wrapper, rtk);
if (ret)
return ERR_PTR(ret);
diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h
index c9cabb679cd1..fc456f75c131 100644
--- a/include/linux/soc/apple/rtkit.h
+++ b/include/linux/soc/apple/rtkit.h
@@ -22,6 +22,7 @@
* @size: Size of the shared memory buffer.
* @iova: Device VA of shared memory buffer.
* @is_mapped: Shared memory buffer is managed by the co-processor.
+ * @private: Private data pointer for the parent driver.
*/
struct apple_rtkit_shmem {
@@ -30,6 +31,7 @@ struct apple_rtkit_shmem {
size_t size;
dma_addr_t iova;
bool is_mapped;
+ void *private;
};
/*
@@ -78,6 +80,25 @@ struct apple_rtkit *devm_apple_rtkit_init(struct device *dev, void *cookie,
const struct apple_rtkit_ops *ops);
/*
+ * Non-devm version of devm_apple_rtkit_init. Must be freed with
+ * apple_rtkit_free.
+ *
+ * @dev: Pointer to the device node this coprocessor is assocated with
+ * @cookie: opaque cookie passed to all functions defined in rtkit_ops
+ * @mbox_name: mailbox name used to communicate with the co-processor
+ * @mbox_idx: mailbox index to be used if mbox_name is NULL
+ * @ops: pointer to rtkit_ops to be used for this co-processor
+ */
+struct apple_rtkit *apple_rtkit_init(struct device *dev, void *cookie,
+ const char *mbox_name, int mbox_idx,
+ const struct apple_rtkit_ops *ops);
+
+/*
+ * Free an instance of apple_rtkit.
+ */
+void apple_rtkit_free(struct apple_rtkit *rtk);
+
+/*
* Reinitialize internal structures. Must only be called with the co-processor
* is held in reset.
*/
@@ -105,6 +126,11 @@ int apple_rtkit_wake(struct apple_rtkit *rtk);
int apple_rtkit_shutdown(struct apple_rtkit *rtk);
/*
+ * Put the co-processor into idle mode
+ */
+int apple_rtkit_idle(struct apple_rtkit *rtk);
+
+/*
* Checks if RTKit is running and ready to handle messages.
*/
bool apple_rtkit_is_running(struct apple_rtkit *rtk);
generated by cgit (git 2.34.1) at 2024-06-22 22:38:31 +0000