5.15-stable review patch. If anyone has any objections, please let me know.
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From: Dikshita Agarwal quic_dikshita@quicinc.com
[ Upstream commit 748b080f21678f2988b0da2d2b396a6f928d9b2c ]
Here we introduce a new fault injection for SSR trigger.
To trigger the SSR: echo 100 > /sys/kernel/debug/venus/fail_ssr/probability echo 1 > /sys/kernel/debug/venus/fail_ssr/times
Co-developed-by: Stanimir Varbanov stanimir.varbanov@linaro.org Signed-off-by: Stanimir Varbanov stanimir.varbanov@linaro.org Signed-off-by: Dikshita Agarwal quic_dikshita@quicinc.com Reviewed-by: Stephen Boyd swboyd@chromium.org Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Stable-dep-of: 3200144a2fa4 ("media: venus: protect against spurious interrupts during probe") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/platform/qcom/venus/core.c | 15 ++++++++++++++- drivers/media/platform/qcom/venus/dbgfs.c | 9 +++++++++ drivers/media/platform/qcom/venus/dbgfs.h | 13 +++++++++++++ 3 files changed, 36 insertions(+), 1 deletion(-)
--- a/drivers/media/platform/qcom/venus/core.c +++ b/drivers/media/platform/qcom/venus/core.c @@ -263,6 +263,19 @@ static void venus_assign_register_offset } }
+static irqreturn_t venus_isr_thread(int irq, void *dev_id) +{ + struct venus_core *core = dev_id; + irqreturn_t ret; + + ret = hfi_isr_thread(irq, dev_id); + + if (ret == IRQ_HANDLED && venus_fault_inject_ssr()) + hfi_core_trigger_ssr(core, HFI_TEST_SSR_SW_ERR_FATAL); + + return ret; +} + static int venus_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -319,7 +332,7 @@ static int venus_probe(struct platform_d mutex_init(&core->lock); INIT_DELAYED_WORK(&core->work, venus_sys_error_handler);
- ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, hfi_isr_thread, + ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, venus_isr_thread, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, "venus", core); if (ret) --- a/drivers/media/platform/qcom/venus/dbgfs.c +++ b/drivers/media/platform/qcom/venus/dbgfs.c @@ -4,13 +4,22 @@ */
#include <linux/debugfs.h> +#include <linux/fault-inject.h>
#include "core.h"
+#ifdef CONFIG_FAULT_INJECTION +DECLARE_FAULT_ATTR(venus_ssr_attr); +#endif + void venus_dbgfs_init(struct venus_core *core) { core->root = debugfs_create_dir("venus", NULL); debugfs_create_x32("fw_level", 0644, core->root, &venus_fw_debug); + +#ifdef CONFIG_FAULT_INJECTION + fault_create_debugfs_attr("fail_ssr", core->root, &venus_ssr_attr); +#endif }
void venus_dbgfs_deinit(struct venus_core *core) --- a/drivers/media/platform/qcom/venus/dbgfs.h +++ b/drivers/media/platform/qcom/venus/dbgfs.h @@ -4,8 +4,21 @@ #ifndef __VENUS_DBGFS_H__ #define __VENUS_DBGFS_H__
+#include <linux/fault-inject.h> + struct venus_core;
+#ifdef CONFIG_FAULT_INJECTION +extern struct fault_attr venus_ssr_attr; +static inline bool venus_fault_inject_ssr(void) +{ + return should_fail(&venus_ssr_attr, 1); +} +#else +static inline bool venus_fault_inject_ssr(void) { return false; } +#endif + + void venus_dbgfs_init(struct venus_core *core); void venus_dbgfs_deinit(struct venus_core *core);