From: Xiaojie Yuan xiaojie.yuan@amd.com
IP Discovery data is TMR fenced by the latest PSP BL, so we need to reserve this region.
Tested on navi10/12/14 with VBIOS integrated with latest PSP BL.
v2: use DISCOVERY_TMR_SIZE macro as bo size use amdgpu_bo_create_kernel_at() to allocate bo
Signed-off-by: Xiaojie Yuan xiaojie.yuan@amd.com Reviewed-by: Hawking Zhang Hawking.Zhang@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit 5f6a556f98de425fcb7928456839a06f02156633) Cc: stable@vger.kernel.org # 5.4.x --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 4 ++-- drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 17 +++++++++++++++++ drivers/gpu/drm/amd/include/discovery.h | 1 - 5 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index bd37df5dd6d0..d1e278e999ee 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -813,6 +813,7 @@ struct amdgpu_device { uint8_t *bios; uint32_t bios_size; struct amdgpu_bo *stolen_vga_memory; + struct amdgpu_bo *discovery_memory; uint32_t bios_scratch_reg_offset; uint32_t bios_scratch[AMDGPU_BIOS_NUM_SCRATCH];
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c index 1481899f86c1..71198c5318e1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c @@ -136,7 +136,7 @@ static int amdgpu_discovery_read_binary(struct amdgpu_device *adev, uint8_t *bin { uint32_t *p = (uint32_t *)binary; uint64_t vram_size = (uint64_t)RREG32(mmRCC_CONFIG_MEMSIZE) << 20; - uint64_t pos = vram_size - BINARY_MAX_SIZE; + uint64_t pos = vram_size - DISCOVERY_TMR_SIZE; unsigned long flags;
while (pos < vram_size) { @@ -179,7 +179,7 @@ int amdgpu_discovery_init(struct amdgpu_device *adev) uint16_t checksum; int r;
- adev->discovery = kzalloc(BINARY_MAX_SIZE, GFP_KERNEL); + adev->discovery = kzalloc(DISCOVERY_TMR_SIZE, GFP_KERNEL); if (!adev->discovery) return -ENOMEM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.h index 85b8c4d4d576..5a6693d7d269 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.h @@ -24,6 +24,8 @@ #ifndef __AMDGPU_DISCOVERY__ #define __AMDGPU_DISCOVERY__
+#define DISCOVERY_TMR_SIZE (64 << 10) + int amdgpu_discovery_init(struct amdgpu_device *adev); void amdgpu_discovery_fini(struct amdgpu_device *adev); int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 3faa1be437e9..f15ded1ce905 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1730,6 +1730,20 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) NULL, &stolen_vga_buf); if (r) return r; + + /* + * reserve one TMR (64K) memory at the top of VRAM which holds + * IP Discovery data and is protected by PSP. + */ + r = amdgpu_bo_create_kernel_at(adev, + adev->gmc.real_vram_size - DISCOVERY_TMR_SIZE, + DISCOVERY_TMR_SIZE, + AMDGPU_GEM_DOMAIN_VRAM, + &adev->discovery_memory, + NULL); + if (r) + return r; + DRM_INFO("amdgpu: %uM of VRAM memory ready\n", (unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
@@ -1794,6 +1808,9 @@ void amdgpu_ttm_late_init(struct amdgpu_device *adev) void *stolen_vga_buf; /* return the VGA stolen memory (if any) back to VRAM */ amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, &stolen_vga_buf); + + /* return the IP Discovery TMR memory back to VRAM */ + amdgpu_bo_free_kernel(&adev->discovery_memory, NULL, NULL); }
/** diff --git a/drivers/gpu/drm/amd/include/discovery.h b/drivers/gpu/drm/amd/include/discovery.h index 5dcb776548d8..7ec4331e67f2 100644 --- a/drivers/gpu/drm/amd/include/discovery.h +++ b/drivers/gpu/drm/amd/include/discovery.h @@ -25,7 +25,6 @@ #define _DISCOVERY_H_
#define PSP_HEADER_SIZE 256 -#define BINARY_MAX_SIZE (64 << 10) #define BINARY_SIGNATURE 0x28211407 #define DISCOVERY_TABLE_SIGNATURE 0x53445049