[AMD Official Use Only - General]
-----Original Message-----
From: Chai, Thomas <YiPeng.Chai@xxxxxxx>
Sent: Sunday, April 28, 2024 3:08 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Zhou1, Tao <Tao.Zhou1@xxxxxxx>; Li, Candice <Candice.Li@xxxxxxx>; Wang, Yang(Kevin) <KevinYang.Wang@xxxxxxx>; Yang, Stanley <Stanley.Yang@xxxxxxx>; Chai, Thomas <YiPeng.Chai@xxxxxxx>
Subject: [PATCH] drm/amdgpu: add mutex to protect ras shared memory
Add mutex to protect ras shared memory.
Signed-off-by: YiPeng Chai <YiPeng.Chai@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 121 ++++++++++++++-------
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c | 2 +
3 files changed, 84 insertions(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 5583e2d1b12f..fa4fea00f6b4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -1564,6 +1564,66 @@ static void psp_ras_ta_check_status(struct psp_context *psp)
}
}
+static int psp_ras_send_cmd(struct psp_context *psp,
+ enum ras_command cmd_id, void *in, void *out) {
+ struct ta_ras_shared_memory *ras_cmd;
+ uint32_t cmd = cmd_id;
+ int ret = 0;
+
+ mutex_lock(&psp->ras_context.mutex);
+ ras_cmd = (struct ta_ras_shared_memory *)psp->ras_context.context.mem_context.shared_buf;
+ memset(ras_cmd, 0, sizeof(struct ta_ras_shared_memory));
+
+ switch (cmd) {
+ case TA_RAS_COMMAND__ENABLE_FEATURES:
+ case TA_RAS_COMMAND__DISABLE_FEATURES:
+ memcpy(&ras_cmd->ras_in_message,
+ in, sizeof(ras_cmd->ras_in_message));
+ break;
+ case TA_RAS_COMMAND__TRIGGER_ERROR:
+ memcpy(&ras_cmd->ras_in_message.trigger_error,
+ in, sizeof(ras_cmd->ras_in_message.trigger_error));
+ break;
+ case TA_RAS_COMMAND__QUERY_ADDRESS:
+ memcpy(&ras_cmd->ras_in_message.address,
+ in, sizeof(ras_cmd->ras_in_message.address));
+ break;
+ default:
+ dev_err(psp->adev->dev, "Invalid ras cmd id: %u\n", cmd);
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ ras_cmd->cmd_id = cmd;
+ ret = psp_ras_invoke(psp, ras_cmd->cmd_id);
+
+ switch (cmd) {
+ case TA_RAS_COMMAND__TRIGGER_ERROR:
+ if (out) {
+ uint32_t *ras_status = (uint32_t *)out;
[Kevin]:
It's better to check 'ret' value first before use this 'out' data.
Best Regards,
Kevin
+
+ *ras_status = ras_cmd->ras_status;
+ }
+ break;
+ case TA_RAS_COMMAND__QUERY_ADDRESS:
+ if (ret || ras_cmd->ras_status || psp->cmd_buf_mem->resp.status)
+ ret = -EINVAL;
+ else if (out)
+ memcpy(out,
+ &ras_cmd->ras_out_message.address,
+ sizeof(ras_cmd->ras_out_message.address));
+ break;
+ default:
+ break;
+ }
+
+err_out:
+ mutex_unlock(&psp->ras_context.mutex);
+
+ return ret;
+}
+
int psp_ras_invoke(struct psp_context *psp, uint32_t ta_cmd_id) {
struct ta_ras_shared_memory *ras_cmd;
@@ -1605,23 +1665,15 @@ int psp_ras_invoke(struct psp_context *psp, uint32_t ta_cmd_id) int psp_ras_enable_features(struct psp_context *psp,
union ta_ras_cmd_input *info, bool enable) {
- struct ta_ras_shared_memory *ras_cmd;
+ enum ras_command cmd_id;
int ret;
- if (!psp->ras_context.context.initialized)
+ if (!psp->ras_context.context.initialized || !info)
return -EINVAL;
- ras_cmd = (struct ta_ras_shared_memory *)psp->ras_context.context.mem_context.shared_buf;
- memset(ras_cmd, 0, sizeof(struct ta_ras_shared_memory));
-
- if (enable)
- ras_cmd->cmd_id = TA_RAS_COMMAND__ENABLE_FEATURES;
- else
- ras_cmd->cmd_id = TA_RAS_COMMAND__DISABLE_FEATURES;
-
- ras_cmd->ras_in_message = *info;
-
- ret = psp_ras_invoke(psp, ras_cmd->cmd_id);
+ cmd_id = enable ?
+ TA_RAS_COMMAND__ENABLE_FEATURES : TA_RAS_COMMAND__DISABLE_FEATURES;
+ ret = psp_ras_send_cmd(psp, cmd_id, info, NULL);
if (ret)
return -EINVAL;
@@ -1645,6 +1697,8 @@ int psp_ras_terminate(struct psp_context *psp)
psp->ras_context.context.initialized = false;
+ mutex_destroy(&psp->ras_context.mutex);
+
return ret;
}
@@ -1729,9 +1783,10 @@ int psp_ras_initialize(struct psp_context *psp)
ret = psp_ta_load(psp, &psp->ras_context.context);
- if (!ret && !ras_cmd->ras_status)
+ if (!ret && !ras_cmd->ras_status) {
psp->ras_context.context.initialized = true;
- else {
+ mutex_init(&psp->ras_context.mutex);
+ } else {
if (ras_cmd->ras_status)
dev_warn(adev->dev, "RAS Init Status: 0x%X\n", ras_cmd->ras_status);
@@ -1745,12 +1800,12 @@ int psp_ras_initialize(struct psp_context *psp) int psp_ras_trigger_error(struct psp_context *psp,
struct ta_ras_trigger_error_input *info, uint32_t instance_mask) {
- struct ta_ras_shared_memory *ras_cmd;
struct amdgpu_device *adev = psp->adev;
int ret;
uint32_t dev_mask;
+ uint32_t ras_status;
- if (!psp->ras_context.context.initialized)
+ if (!psp->ras_context.context.initialized || !info)
return -EINVAL;
switch (info->block_id) {
@@ -1774,13 +1829,8 @@ int psp_ras_trigger_error(struct psp_context *psp,
dev_mask &= AMDGPU_RAS_INST_MASK;
info->sub_block_index |= dev_mask;
- ras_cmd = (struct ta_ras_shared_memory *)psp->ras_context.context.mem_context.shared_buf;
- memset(ras_cmd, 0, sizeof(struct ta_ras_shared_memory));
-
- ras_cmd->cmd_id = TA_RAS_COMMAND__TRIGGER_ERROR;
- ras_cmd->ras_in_message.trigger_error = *info;
-
- ret = psp_ras_invoke(psp, ras_cmd->cmd_id);
+ ret = psp_ras_send_cmd(psp,
+ TA_RAS_COMMAND__TRIGGER_ERROR, info, &ras_status);
if (ret)
return -EINVAL;
@@ -1790,9 +1840,9 @@ int psp_ras_trigger_error(struct psp_context *psp,
if (amdgpu_ras_intr_triggered())
return 0;
- if (ras_cmd->ras_status == TA_RAS_STATUS__TEE_ERROR_ACCESS_DENIED)
+ if (ras_status == TA_RAS_STATUS__TEE_ERROR_ACCESS_DENIED)
return -EACCES;
- else if (ras_cmd->ras_status)
+ else if (ras_status)
return -EINVAL;
return 0;
@@ -1802,25 +1852,16 @@ int psp_ras_query_address(struct psp_context *psp,
struct ta_ras_query_address_input *addr_in,
struct ta_ras_query_address_output *addr_out) {
- struct ta_ras_shared_memory *ras_cmd;
int ret;
- if (!psp->ras_context.context.initialized)
- return -EINVAL;
-
- ras_cmd = (struct ta_ras_shared_memory *)psp->ras_context.context.mem_context.shared_buf;
- memset(ras_cmd, 0, sizeof(struct ta_ras_shared_memory));
-
- ras_cmd->cmd_id = TA_RAS_COMMAND__QUERY_ADDRESS;
- ras_cmd->ras_in_message.address = *addr_in;
-
- ret = psp_ras_invoke(psp, ras_cmd->cmd_id);
- if (ret || ras_cmd->ras_status || psp->cmd_buf_mem->resp.status)
+ if (!psp->ras_context.context.initialized ||
+ !addr_in || !addr_out)
return -EINVAL;
- *addr_out = ras_cmd->ras_out_message.address;
+ ret = psp_ras_send_cmd(psp,
+ TA_RAS_COMMAND__QUERY_ADDRESS, addr_in, addr_out);
- return 0;
+ return ret;
}
// ras end
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
index ee16f134ae92..686023918ce3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
@@ -197,6 +197,7 @@ struct psp_xgmi_context { struct psp_ras_context {
struct ta_context context;
struct amdgpu_ras *ras;
+ struct mutex mutex;
};
#define MEM_TRAIN_SYSTEM_SIGNATURE 0x54534942
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
index ca5c86e5f7cd..87f213f92d83 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
@@ -348,6 +348,7 @@ static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size
context->session_id = ta_id;
+ mutex_lock(&psp->ras_context.mutex);
ret = prep_ta_mem_context(&context->mem_context, shared_buf, shared_buf_len);
if (ret)
goto err_free_shared_buf;
@@ -366,6 +367,7 @@ static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size
ret = -EFAULT;
err_free_shared_buf:
+ mutex_unlock(&psp->ras_context.mutex);
kfree(shared_buf);
return ret;
--
2.34.1
