[PATCH 1/8] drm/amdgpu: update psp gfx i/f to support dynamic GECC

[PATCH 1/8] drm/amdgpu: update psp gfx i/f to support dynamic GECC

[Hawking Zhang]

psp_gfx_uresp_bootcfg is used to inform driver
bootcfg settings maintained by tOS

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h b/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
index f6d3180febc4..dd0dce254901 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
+++ b/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
@@ -332,11 +332,16 @@ struct psp_gfx_uresp_fwar_db_info
     uint32_t fwar_db_addr_hi;
 };
 
+/* Command-specific response for boot config. */
+struct psp_gfx_uresp_bootcfg {
+	uint32_t boot_cfg;	/* boot config data */
+};
+
 /* Union of command-specific responses for GPCOM ring. */
-union psp_gfx_uresp
-{
-    struct psp_gfx_uresp_reserved reserved;
-    struct psp_gfx_uresp_fwar_db_info fwar_db_info;
+union psp_gfx_uresp {
+	struct psp_gfx_uresp_reserved		reserved;
+	struct psp_gfx_uresp_bootcfg		boot_cfg;
+	struct psp_gfx_uresp_fwar_db_info	fwar_db_info;
 };
 
 /* Structure of GFX Response buffer.
-- 
2.17.1

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[PATCH 2/8] drm/amdgpu: allow different boot configs

[Hawking Zhang]

More boot configs need to be supported via
BOOTCFG_CMD_SET

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 55378c6b9722..a8856697733e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -535,7 +535,7 @@ int psp_get_fw_attestation_records_addr(struct psp_context *psp,
 	return ret;
 }
 
-static int psp_boot_config_set(struct amdgpu_device *adev)
+static int psp_boot_config_set(struct amdgpu_device *adev, uint32_t boot_cfg)
 {
 	struct psp_context *psp = &adev->psp;
 	struct psp_gfx_cmd_resp *cmd = psp->cmd;
@@ -547,8 +547,8 @@ static int psp_boot_config_set(struct amdgpu_device *adev)
 
 	cmd->cmd_id = GFX_CMD_ID_BOOT_CFG;
 	cmd->cmd.boot_cfg.sub_cmd = BOOTCFG_CMD_SET;
-	cmd->cmd.boot_cfg.boot_config = BOOT_CONFIG_GECC;
-	cmd->cmd.boot_cfg.boot_config_valid = BOOT_CONFIG_GECC;
+	cmd->cmd.boot_cfg.boot_config = boot_cfg;
+	cmd->cmd.boot_cfg.boot_config_valid = boot_cfg;
 
 	return psp_cmd_submit_buf(psp, NULL, cmd, psp->fence_buf_mc_addr);
 }
@@ -1934,7 +1934,7 @@ static int psp_hw_start(struct psp_context *psp)
 	}
 
 	if (amdgpu_atomfirmware_dynamic_boot_config_supported(adev)) {
-		ret = psp_boot_config_set(adev);
+		ret = psp_boot_config_set(adev, BOOT_CONFIG_GECC);
 		if (ret)
 			dev_warn(adev->dev, "PSP set boot config failed\n");
 	}
-- 
2.17.1

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[PATCH 3/8] drm/amdgpu: add helper function to query gecc status in boot config

[Hawking Zhang]

Query GECC enablement status in boot config

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index a8856697733e..d509d52dd235 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -535,6 +535,29 @@ int psp_get_fw_attestation_records_addr(struct psp_context *psp,
 	return ret;
 }
 
+static int psp_boot_config_get(struct amdgpu_device *adev, uint32_t *boot_cfg)
+{
+	struct psp_context *psp = &adev->psp;
+	struct psp_gfx_cmd_resp *cmd = psp->cmd;
+	int ret;
+
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
+	memset(cmd, 0, sizeof(struct psp_gfx_cmd_resp));
+
+	cmd->cmd_id = GFX_CMD_ID_BOOT_CFG;
+	cmd->cmd.boot_cfg.sub_cmd = BOOTCFG_CMD_GET;
+
+	ret = psp_cmd_submit_buf(psp, NULL, cmd, psp->fence_buf_mc_addr);
+	if (!ret) {
+		*boot_cfg =
+			(cmd->resp.uresp.boot_cfg.boot_cfg & BOOT_CONFIG_GECC) ? 1 : 0;
+	}
+
+	return ret;
+}
+
 static int psp_boot_config_set(struct amdgpu_device *adev, uint32_t boot_cfg)
 {
 	struct psp_context *psp = &adev->psp;
-- 
2.17.1

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[PATCH 4/8] drm/amdgpu: enable dynamic GECC support (v2)

[Hawking Zhang]

Dynamic GECC allows user to specify GECC enablement
status, which will take effect in next boot cycle.

v2: initialize boot_cfg to 0xFF

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 57 ++++++++++++++++++++-----
 1 file changed, 47 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index d509d52dd235..ab4e89186186 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -1220,19 +1220,62 @@ static int psp_ras_terminate(struct psp_context *psp)
 static int psp_ras_initialize(struct psp_context *psp)
 {
 	int ret;
+	uint32_t boot_cfg = 0xFF;
+	struct amdgpu_device *adev = psp->adev;
 
 	/*
 	 * TODO: bypass the initialize in sriov for now
 	 */
-	if (amdgpu_sriov_vf(psp->adev))
+	if (amdgpu_sriov_vf(adev))
 		return 0;
 
-	if (!psp->adev->psp.ta_ras_ucode_size ||
-	    !psp->adev->psp.ta_ras_start_addr) {
-		dev_info(psp->adev->dev, "RAS: optional ras ta ucode is not available\n");
+	if (!adev->psp.ta_ras_ucode_size ||
+	    !adev->psp.ta_ras_start_addr) {
+		dev_info(adev->dev, "RAS: optional ras ta ucode is not available\n");
 		return 0;
 	}
 
+	if (amdgpu_atomfirmware_dynamic_boot_config_supported(adev)) {
+		/* query GECC enablement status from boot config
+		 * boot_cfg: 1: GECC is enabled or 0: GECC is disabled
+		 */
+		ret = psp_boot_config_get(adev, &boot_cfg);
+		if (ret)
+			dev_warn(adev->dev, "PSP get boot config failed\n");
+
+		if (!amdgpu_ras_is_supported(psp->adev, AMDGPU_RAS_BLOCK__UMC)) {
+			if (!boot_cfg) {
+				dev_info(adev->dev, "GECC is disabled\n");
+			} else {
+				/* disable GECC in next boot cycle if ras is
+				 * disabled by module parameter amdgpu_ras_enable
+				 * and/or amdgpu_ras_mask, or boot_config_get call
+				 * is failed
+				 */
+				ret = psp_boot_config_set(adev, 0);
+				if (ret)
+					dev_warn(adev->dev, "PSP set boot config failed\n");
+				else
+					dev_warn(adev->dev, "GECC will be disabled in next boot cycle "
+						 "if set amdgpu_ras_enable and/or amdgpu_ras_mask to 0x0\n");
+			}
+		} else {
+			if (1 == boot_cfg) {
+				dev_info(adev->dev, "GECC is enabled\n");
+			} else {
+				/* enable GECC in next boot cycle if it is disabled
+				 * in boot config, or force enable GECC if failed to
+				 * get boot configuration
+				 */
+				ret = psp_boot_config_set(adev, BOOT_CONFIG_GECC);
+				if (ret)
+					dev_warn(adev->dev, "PSP set boot config failed\n");
+				else
+					dev_warn(adev->dev, "GECC will be enabled in next boot cycle\n");
+			}
+		}
+	}
+
 	if (!psp->ras.ras_initialized) {
 		ret = psp_ras_init_shared_buf(psp);
 		if (ret)
@@ -1956,12 +1999,6 @@ static int psp_hw_start(struct psp_context *psp)
 		return ret;
 	}
 
-	if (amdgpu_atomfirmware_dynamic_boot_config_supported(adev)) {
-		ret = psp_boot_config_set(adev, BOOT_CONFIG_GECC);
-		if (ret)
-			dev_warn(adev->dev, "PSP set boot config failed\n");
-	}
-
 	ret = psp_tmr_init(psp);
 	if (ret) {
 		DRM_ERROR("PSP tmr init failed!\n");
-- 
2.17.1

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[PATCH 5/8] drm/amdgpu: add psp runtime db structures

[Hawking Zhang]

PSP runtime database is used to share various
boot up information with driver.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h | 54 +++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
index 46a5328e00e0..4dad9b539f06 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
@@ -226,6 +226,60 @@ struct psp_memory_training_context {
 	u32 training_cnt;
 };
 
+/** PSP runtime DB **/
+#define PSP_RUNTIME_DB_SIZE_IN_BYTES		0x10000
+#define PSP_RUNTIME_DB_OFFSET			0x100000
+#define PSP_RUNTIME_DB_COOKIE_ID		0x0ed5
+#define PSP_RUNTIME_DB_VER_1			0x0100
+#define PSP_RUNTIME_DB_DIAG_ENTRY_MAX_COUNT	0x40
+
+enum psp_runtime_entry_type {
+	PSP_RUNTIME_ENTRY_TYPE_INVALID		= 0x0,
+	PSP_RUNTIME_ENTRY_TYPE_TEST		= 0x1,
+	PSP_RUNTIME_ENTRY_TYPE_MGPU_COMMON	= 0x2,  /* Common mGPU runtime data */
+	PSP_RUNTIME_ENTRY_TYPE_MGPU_WAFL	= 0x3,  /* WAFL runtime data */
+	PSP_RUNTIME_ENTRY_TYPE_MGPU_XGMI	= 0x4,  /* XGMI runtime data */
+	PSP_RUNTIME_ENTRY_TYPE_BOOT_CONFIG	= 0x5,  /* Boot Config runtime data */
+};
+
+/* PSP runtime DB header */
+struct psp_runtime_data_header {
+	/* determine the existence of runtime db */
+	uint16_t cookie;
+	/* version of runtime db */
+	uint16_t version;
+};
+
+/* PSP runtime DB entry */
+struct psp_runtime_entry {
+	/* type of runtime db entry */
+	uint32_t entry_type;
+	/* offset of entry in bytes */
+	uint16_t offset;
+	/* size of entry in bytes */
+	uint16_t size;
+};
+
+/* PSP runtime DB directory */
+struct psp_runtime_data_directory {
+	/* number of valid entries */
+	uint16_t			entry_count;
+	/* db entries*/
+	struct psp_runtime_entry	entry_list[PSP_RUNTIME_DB_DIAG_ENTRY_MAX_COUNT];
+};
+
+/* PSP runtime DB boot config feature bitmask */
+enum psp_runtime_boot_cfg_feature {
+	BOOT_CFG_FEATURE_GECC                       = 0x1,
+	BOOT_CFG_FEATURE_TWO_STAGE_DRAM_TRAINING    = 0x2,
+};
+
+/* PSP runtime DB boot config entry */
+struct psp_runtime_boot_cfg_entry {
+	uint32_t boot_cfg_bitmask;
+	uint32_t reserved;
+};
+
 struct psp_context
 {
 	struct amdgpu_device            *adev;
-- 
2.17.1

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[PATCH 6/8] drm/amdgpu: add helper function to query psp runtime db entry (v2)

[Hawking Zhang]

PSP will dump various boot up information into a
portion of local frame buffer, called runtime database.
The helper function is used for driver to query those
shared information.

v2: init ret and check !ret to exit loop as soon as
found the entry

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 68 +++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index ab4e89186186..dc786c91ec9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -164,6 +164,74 @@ static int psp_memory_training_init(struct psp_context *psp)
 	return ret;
 }
 
+/*
+ * Helper funciton to query psp runtime database entry
+ *
+ * @adev: amdgpu_device pointer
+ * @entry_type: the type of psp runtime database entry
+ * @db_entry: runtime database entry pointer
+ *
+ * Return false if runtime database doesn't exit or entry is invalid
+ * or true if the specific database entry is found, and copy to @db_entry
+ */
+static bool psp_get_runtime_db_entry(struct amdgpu_device *adev,
+				     enum psp_runtime_entry_type entry_type,
+				     void *db_entry)
+{
+	uint64_t db_header_pos, db_dir_pos;
+	struct psp_runtime_data_header db_header = {0};
+	struct psp_runtime_data_directory db_dir = {0};
+	bool ret = false;
+	int i;
+
+	db_header_pos = adev->gmc.mc_vram_size - PSP_RUNTIME_DB_OFFSET;
+	db_dir_pos = db_header_pos + sizeof(struct psp_runtime_data_header);
+
+	/* read runtime db header from vram */
+	amdgpu_device_vram_access(adev, db_header_pos, (uint32_t *)&db_header,
+			sizeof(struct psp_runtime_data_header), false);
+
+	if (db_header.cookie != PSP_RUNTIME_DB_COOKIE_ID) {
+		/* runtime db doesn't exist, exit */
+		dev_warn(adev->dev, "PSP runtime database doesn't exist\n");
+		return false;
+	}
+
+	/* read runtime database entry from vram */
+	amdgpu_device_vram_access(adev, db_dir_pos, (uint32_t *)&db_dir,
+			sizeof(struct psp_runtime_data_directory), false);
+
+	if (db_dir.entry_count >= PSP_RUNTIME_DB_DIAG_ENTRY_MAX_COUNT) {
+		/* invalid db entry count, exit */
+		dev_warn(adev->dev, "Invalid PSP runtime database entry count\n");
+		return false;
+	}
+
+	/* look up for requested entry type */
+	for (i = 0; i < db_dir.entry_count && !ret; i++) {
+		if (db_dir.entry_list[i].entry_type == entry_type) {
+			switch (entry_type) {
+			case PSP_RUNTIME_ENTRY_TYPE_BOOT_CONFIG:
+				if (db_dir.entry_list[i].size < sizeof(struct psp_runtime_boot_cfg_entry)) {
+					/* invalid db entry size */
+					dev_warn(adev->dev, "Invalid PSP runtime database entry size\n");
+					return false;
+				}
+				/* read runtime database entry */
+				amdgpu_device_vram_access(adev, db_header_pos + db_dir.entry_list[i].offset,
+							  (uint32_t *)db_entry, sizeof(struct psp_runtime_boot_cfg_entry), false);
+				ret = true;
+				break;
+			default:
+				ret = false;
+				break;
+			}
+		}
+	}
+
+	return ret;
+}
+
 static int psp_sw_init(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-- 
2.17.1

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Re: [PATCH 6/8] drm/amdgpu: add helper function to query psp runtime db entry (v2)

[Michel Dänzer]

On 2021-06-11 9:05 a.m., Hawking Zhang wrote:
> PSP will dump various boot up information into a
> portion of local frame buffer, called runtime database.
> The helper function is used for driver to query those
> shared information.
> 
> v2: init ret and check !ret to exit loop as soon as
> found the entry
> 
> Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
> Reviewed-by: John Clements <john.clements@amd.com>
> Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 68 +++++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> index ab4e89186186..dc786c91ec9d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
> @@ -164,6 +164,74 @@ static int psp_memory_training_init(struct psp_context *psp)
>  	return ret;
>  }
>  
> +/*
> + * Helper funciton to query psp runtime database entry
> + *
> + * @adev: amdgpu_device pointer
> + * @entry_type: the type of psp runtime database entry
> + * @db_entry: runtime database entry pointer
> + *
> + * Return false if runtime database doesn't exit or entry is invalid
> + * or true if the specific database entry is found, and copy to @db_entry
> + */
> +static bool psp_get_runtime_db_entry(struct amdgpu_device *adev,
> +				     enum psp_runtime_entry_type entry_type,
> +				     void *db_entry)
> +{
> +	uint64_t db_header_pos, db_dir_pos;
> +	struct psp_runtime_data_header db_header = {0};
> +	struct psp_runtime_data_directory db_dir = {0};
> +	bool ret = false;
> +	int i;
> +
> +	db_header_pos = adev->gmc.mc_vram_size - PSP_RUNTIME_DB_OFFSET;
> +	db_dir_pos = db_header_pos + sizeof(struct psp_runtime_data_header);
> +
> +	/* read runtime db header from vram */
> +	amdgpu_device_vram_access(adev, db_header_pos, (uint32_t *)&db_header,
> +			sizeof(struct psp_runtime_data_header), false);
> +
> +	if (db_header.cookie != PSP_RUNTIME_DB_COOKIE_ID) {
> +		/* runtime db doesn't exist, exit */
> +		dev_warn(adev->dev, "PSP runtime database doesn't exist\n");
> +		return false;
> +	}

I just noticed this message in the output of

 dmesg -l emerg,alert,crit,err,warn

I wonder if these messages really need to be printed by default at all, let alone at warning level. Do they indicate an issue which needs to be addressed?


> +	/* read runtime database entry from vram */
> +	amdgpu_device_vram_access(adev, db_dir_pos, (uint32_t *)&db_dir,
> +			sizeof(struct psp_runtime_data_directory), false);
> +
> +	if (db_dir.entry_count >= PSP_RUNTIME_DB_DIAG_ENTRY_MAX_COUNT) {
> +		/* invalid db entry count, exit */
> +		dev_warn(adev->dev, "Invalid PSP runtime database entry count\n");
> +		return false;
> +	}


-- 
Earthling Michel Dänzer               |               https://redhat.com
Libre software enthusiast             |             Mesa and X developer
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[PATCH 7/8] drm/amdgpu: cache psp runtime boot_cfg_bitmask in sw_int

[Hawking Zhang]

PSP runtime boot_cfg_bitmask carries various psp bl
feature bit mask that can be used by driver. Cache
it in sw_init for further usage.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 7 +++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index dc786c91ec9d..28f95c5cd373 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -237,6 +237,7 @@ static int psp_sw_init(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	struct psp_context *psp = &adev->psp;
 	int ret;
+	struct psp_runtime_boot_cfg_entry boot_cfg_entry;
 
 	if (!amdgpu_sriov_vf(adev)) {
 		ret = psp_init_microcode(psp);
@@ -246,6 +247,12 @@ static int psp_sw_init(void *handle)
 		}
 	}
 
+	memset(&boot_cfg_entry, 0, sizeof(boot_cfg_entry));
+	if (psp_get_runtime_db_entry(adev,
+				PSP_RUNTIME_ENTRY_TYPE_BOOT_CONFIG,
+				&boot_cfg_entry))
+		psp->boot_cfg_bitmask = boot_cfg_entry.boot_cfg_bitmask;
+
 	ret = psp_memory_training_init(psp);
 	if (ret) {
 		DRM_ERROR("Failed to initialize memory training!\n");
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
index 4dad9b539f06..2bd85b505f2c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
@@ -378,6 +378,8 @@ struct psp_context
 	struct psp_securedisplay_context	securedisplay_context;
 	struct mutex			mutex;
 	struct psp_memory_training_context mem_train_ctx;
+
+	uint32_t			boot_cfg_bitmask;
 };
 
 struct amdgpu_psp_funcs {
-- 
2.17.1

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[PATCH 8/8] drm/amdgpu: disable DRAM memory training when GECC is enabled

[Hawking Zhang]

GECC and G6 mem training are mutually exclusive
functionalities. VBIOS/PSP will set the flag
(BOOT_CFG_FEATURE_TWO_STAGE_DRAM_TRAINING) in
runtime database to indicate whether dram memory
training need to be disabled or not.

For Navi1x families, two stage mem training is always
enabled.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 47 ++++++++++++++++++-------
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h |  1 +
 2 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 28f95c5cd373..7e0e676a9959 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -238,6 +238,7 @@ static int psp_sw_init(void *handle)
 	struct psp_context *psp = &adev->psp;
 	int ret;
 	struct psp_runtime_boot_cfg_entry boot_cfg_entry;
+	struct psp_memory_training_context *mem_training_ctx = &psp->mem_train_ctx;
 
 	if (!amdgpu_sriov_vf(adev)) {
 		ret = psp_init_microcode(psp);
@@ -250,18 +251,36 @@ static int psp_sw_init(void *handle)
 	memset(&boot_cfg_entry, 0, sizeof(boot_cfg_entry));
 	if (psp_get_runtime_db_entry(adev,
 				PSP_RUNTIME_ENTRY_TYPE_BOOT_CONFIG,
-				&boot_cfg_entry))
+				&boot_cfg_entry)) {
 		psp->boot_cfg_bitmask = boot_cfg_entry.boot_cfg_bitmask;
+		if ((psp->boot_cfg_bitmask) &
+		    BOOT_CFG_FEATURE_TWO_STAGE_DRAM_TRAINING) {
+			/* If psp runtime database exists, then
+			 * only enable two stage memory training
+			 * when TWO_STAGE_DRAM_TRAINING bit is set
+			 * in runtime database */
+			mem_training_ctx->enable_mem_training = true;
+		}
 
-	ret = psp_memory_training_init(psp);
-	if (ret) {
-		DRM_ERROR("Failed to initialize memory training!\n");
-		return ret;
+	} else {
+		/* If psp runtime database doesn't exist or
+		 * is invalid, force enable two stage memory
+		 * training */
+		mem_training_ctx->enable_mem_training = true;
 	}
-	ret = psp_mem_training(psp, PSP_MEM_TRAIN_COLD_BOOT);
-	if (ret) {
-		DRM_ERROR("Failed to process memory training!\n");
-		return ret;
+
+	if (mem_training_ctx->enable_mem_training) {
+		ret = psp_memory_training_init(psp);
+		if (ret) {
+			DRM_ERROR("Failed to initialize memory training!\n");
+			return ret;
+		}
+
+		ret = psp_mem_training(psp, PSP_MEM_TRAIN_COLD_BOOT);
+		if (ret) {
+			DRM_ERROR("Failed to process memory training!\n");
+			return ret;
+		}
 	}
 
 	if (adev->asic_type == CHIP_NAVI10 || adev->asic_type == CHIP_SIENNA_CICHLID) {
@@ -2676,10 +2695,12 @@ static int psp_resume(void *handle)
 
 	DRM_INFO("PSP is resuming...\n");
 
-	ret = psp_mem_training(psp, PSP_MEM_TRAIN_RESUME);
-	if (ret) {
-		DRM_ERROR("Failed to process memory training!\n");
-		return ret;
+	if (psp->mem_train_ctx.enable_mem_training) {
+		ret = psp_mem_training(psp, PSP_MEM_TRAIN_RESUME);
+		if (ret) {
+			DRM_ERROR("Failed to process memory training!\n");
+			return ret;
+		}
 	}
 
 	mutex_lock(&adev->firmware.mutex);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
index 2bd85b505f2c..0b514ba31e42 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
@@ -224,6 +224,7 @@ struct psp_memory_training_context {
 
 	enum psp_memory_training_init_flag init;
 	u32 training_cnt;
+	bool enable_mem_training;
 };
 
 /** PSP runtime DB **/
-- 
2.17.1

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