[PATCH 6/7] drm/amdgpu: Check gmc requirement for reset on init

[Lijo Lazar]

Add a callback to check if there is any condition detected by GMC block
for reset on init. One case is if a pending NPS change request is
detected. If reset is done because of NPS switch, refresh NPS info from
discovery table.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 13 ++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h |  5 +++++
 drivers/gpu/drm/amd/amdgpu/soc15.c      |  2 ++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 21f1e65c9dc9..011fe3a847d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -1261,12 +1261,15 @@ int amdgpu_gmc_get_nps_memranges(struct amdgpu_device *adev,
 	struct amdgpu_gmc_memrange *ranges;
 	int range_cnt, ret, i, j;
 	uint32_t nps_type;
+	bool refresh;
 
 	if (!mem_ranges)
 		return -EINVAL;
 
+	refresh = (adev->init_lvl->level != AMDGPU_INIT_LEVEL_MINIMAL_XGMI) &&
+		  (adev->gmc.reset_flags & AMDGPU_GMC_INIT_RESET_NPS);
 	ret = amdgpu_discovery_get_nps_info(adev, &nps_type, &ranges,
-					    &range_cnt, false);
+					    &range_cnt, refresh);
 
 	if (ret)
 		return ret;
@@ -1392,3 +1395,11 @@ void amdgpu_gmc_prepare_nps_mode_change(struct amdgpu_device *adev)
 			adev->dev,
 			"NPS mode change request done, reload driver to complete the change\n");
 }
+
+bool amdgpu_gmc_need_reset_on_init(struct amdgpu_device *adev)
+{
+	if (adev->gmc.gmc_funcs->need_reset_on_init)
+		return adev->gmc.gmc_funcs->need_reset_on_init(adev);
+
+	return false;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
index b13d6adb5efd..d4cd247fe574 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
@@ -78,6 +78,8 @@ enum amdgpu_memory_partition {
 	 BIT(AMDGPU_NPS3_PARTITION_MODE) | BIT(AMDGPU_NPS4_PARTITION_MODE) | \
 	 BIT(AMDGPU_NPS6_PARTITION_MODE) | BIT(AMDGPU_NPS8_PARTITION_MODE))
 
+#define AMDGPU_GMC_INIT_RESET_NPS  BIT(0)
+
 /*
  * GMC page fault information
  */
@@ -169,6 +171,7 @@ struct amdgpu_gmc_funcs {
 	/* Request NPS mode */
 	int (*request_mem_partition_mode)(struct amdgpu_device *adev,
 					  int nps_mode);
+	bool (*need_reset_on_init)(struct amdgpu_device *adev);
 };
 
 struct amdgpu_xgmi_ras {
@@ -314,6 +317,7 @@ struct amdgpu_gmc {
 	const struct amdgpu_gmc_funcs	*gmc_funcs;
 	enum amdgpu_memory_partition	requested_nps_mode;
 	uint32_t supported_nps_modes;
+	uint32_t reset_flags;
 
 	struct amdgpu_xgmi xgmi;
 	struct amdgpu_irq_src	ecc_irq;
@@ -468,5 +472,6 @@ int amdgpu_gmc_get_nps_memranges(struct amdgpu_device *adev,
 int amdgpu_gmc_request_memory_partition(struct amdgpu_device *adev,
 					int nps_mode);
 void amdgpu_gmc_prepare_nps_mode_change(struct amdgpu_device *adev);
+bool amdgpu_gmc_need_reset_on_init(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 619933f252aa..97ca4931a7ef 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -833,6 +833,8 @@ static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
 
 	if (amdgpu_psp_tos_reload_needed(adev))
 		return true;
+	if (amdgpu_gmc_need_reset_on_init(adev))
+		return true;
 	/* Just return false for soc15 GPUs.  Reset does not seem to
 	 * be necessary.
 	 */
-- 
2.25.1