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Merge "soc: qcom: add disable/enable SPSS SSR ioctl()"

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This commit is contained in:
qctecmdr 2020-09-09 06:09:23 -07:00 • committed by Gerrit - the friendly Code Review server
commit 6022ecf539
2 changed files with 26 additions and 1 deletions
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24
drivers/soc/qcom/spss_utils.c
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@ -34,6 +34,7 @@
#include <linux/sizes.h> /* SZ_4K */
#include <linux/uaccess.h> /* copy_from_user() */
#include <linux/completion.h> /* wait_for_completion_timeout() */
#include <linux/reboot.h> /* kernel_restart() */
#include <soc/qcom/subsystem_notif.h>
#include <soc/qcom/subsystem_restart.h>
@ -84,6 +85,7 @@ static u32 saved_apps_cmac[NUM_UEFI_APPS][CMAC_SIZE_IN_DWORDS];
static u32 iar_state;
static bool is_iar_enabled;
static bool ssr_disabled_flag;
static void __iomem *cmac_mem;
static size_t cmac_mem_size = SZ_4K; /* XPU align to 4KB */
@ -598,9 +600,23 @@ static long spss_utils_ioctl(struct file *file,
return ret;
break;
case SPSS_IOC_SET_SSR_STATE:
/* check input params */
if (size != sizeof(uint32_t)) {
pr_err("cmd [0x%x] invalid size [0x%x]\n", cmd, size);
return -EINVAL;
}
if (is_iar_active) {
memcpy(&ssr_disabled_flag, data, size);
pr_debug("SSR disabled state updated to: %d\n",
ssr_disabled_flag);
}
break;
default:
pr_err("invalid ioctl cmd [0x%x]\n", cmd);
return -EINVAL;
return -ENOIOCTLCMD;
}
return 0;
@ -1116,6 +1132,10 @@ static int spss_utils_pil_callback(struct notifier_block *nb,
break;
case SUBSYS_BEFORE_POWERUP:
pr_debug("[SUBSYS_BEFORE_POWERUP] event.\n");
if (is_iar_active && ssr_disabled_flag) {
pr_warn("SPSS SSR disabled, requesting reboot\n");
kernel_restart("SPSS SSR disabled, requesting reboot");
}
break;
case SUBSYS_AFTER_POWERUP:
pr_debug("[SUBSYS_AFTER_POWERUP] event.\n");
@ -1233,6 +1253,8 @@ static int spss_probe(struct platform_device *pdev)
}
mutex_init(&event_lock);
ssr_disabled_flag = false;
pr_info("Probe completed successfully, [%s].\n", firmware_name);
return 0;

3
include/uapi/linux/spss_utils.h
View file

@ -78,4 +78,7 @@ struct spss_ioc_is_signaled {
#define SPSS_IOC_IS_EVENT_SIGNALED \
_IOWR(SPSS_IOC_MAGIC, 4, struct spss_ioc_is_signaled)
#define SPSS_IOC_SET_SSR_STATE \
_IOWR(SPSS_IOC_MAGIC, 5, __u32)
#endif /* _UAPI_SPSS_UTILS_H_ */