diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/1382-drm-amdgpu-implement-vm_operations_struct.access.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/1382-drm-amdgpu-implement-vm_operations_struct.access.patch | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/1382-drm-amdgpu-implement-vm_operations_struct.access.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/1382-drm-amdgpu-implement-vm_operations_struct.access.patch new file mode 100644 index 00000000..c39ed82c --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/1382-drm-amdgpu-implement-vm_operations_struct.access.patch @@ -0,0 +1,136 @@ +From 7e298768abac419327d0ef5a1c7fa3ac3dc9cbf6 Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Mon, 1 Feb 2016 16:11:37 -0500 +Subject: [PATCH 1382/4131] drm/amdgpu: implement vm_operations_struct.access + +Allows gdb to access contents of user mode mapped BOs. + +Change-Id: Ice34fd17c914369172e2d30db97c36ab013a0e82 +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +Signed-off-by: kalyan alle <kalyan.alle@amd.com> + + Conflicts: + drivers/gpu/drm/amd/amdgpu/amdgpu.h +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 98 ++++++++++++++++++++++++++++++++- + 1 file changed, 97 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +index 2b866be..0e77e62 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +@@ -1625,7 +1625,102 @@ void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size) + } + + static struct vm_operations_struct amdgpu_ttm_vm_ops; +-static const struct vm_operations_struct *ttm_vm_ops; ++static const struct vm_operations_struct *ttm_vm_ops /* = NULL; ++ * (appease checkpatch) */; ++static int amdgpu_ttm_bo_access_vram(struct amdgpu_bo *abo, ++ unsigned long offset, ++ void *buf, int len, int write) ++{ ++ struct amdgpu_device *adev = abo->adev; ++ uint64_t pos = amdgpu_bo_gpu_offset(abo) + offset; ++ uint32_t value = 0; ++ unsigned long flags; ++ int result = 0; ++ ++ while (len && pos < adev->mc.mc_vram_size) { ++ uint64_t aligned_pos = pos & ~(uint64_t)3; ++ uint32_t bytes = 4 - (pos & 3); ++ uint32_t shift = (pos & 3) * 8; ++ uint32_t mask = 0xffffffff << shift; ++ ++ if (len < bytes) { ++ mask &= 0xffffffff >> (bytes - len) * 8; ++ bytes = len; ++ } ++ ++ spin_lock_irqsave(&adev->mmio_idx_lock, flags); ++ WREG32(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000); ++ WREG32(mmMM_INDEX_HI, aligned_pos >> 31); ++ if (!write || mask != 0xffffffff) ++ value = RREG32(mmMM_DATA); ++ if (write) { ++ value &= ~mask; ++ value |= (*(uint32_t *)buf << shift) & mask; ++ WREG32(mmMM_DATA, value); ++ } ++ spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); ++ if (!write) { ++ value = (value & mask) >> shift; ++ memcpy(buf, &value, bytes); ++ } ++ ++ result += bytes; ++ buf = (uint8_t *)buf + bytes; ++ pos += bytes; ++ len -= bytes; ++ } ++ ++ return result; ++} ++ ++static int amdgpu_ttm_bo_access_kmap(struct amdgpu_bo *abo, ++ unsigned long offset, ++ void *buf, int len, int write) ++{ ++ struct ttm_buffer_object *bo = &abo->tbo; ++ struct ttm_bo_kmap_obj map; ++ void *ptr; ++ bool is_iomem; ++ int r; ++ ++ r = ttm_bo_kmap(bo, 0, bo->num_pages, &map); ++ if (r) ++ return r; ++ ptr = (uint8_t *)ttm_kmap_obj_virtual(&map, &is_iomem) + offset; ++ WARN_ON(is_iomem); ++ if (write) ++ memcpy(ptr, buf, len); ++ else ++ memcpy(buf, ptr, len); ++ ttm_bo_kunmap(&map); ++ ++ return len; ++} ++ ++static int amdgpu_ttm_vm_access(struct vm_area_struct *vma, unsigned long addr, ++ void *buf, int len, int write) ++{ ++ unsigned long offset = (addr) - vma->vm_start; ++ struct ttm_buffer_object *bo = vma->vm_private_data; ++ struct amdgpu_bo *abo = container_of(bo, struct amdgpu_bo, tbo); ++ unsigned domain; ++ int result; ++ ++ result = amdgpu_bo_reserve(abo, false); ++ if (result != 0) ++ return result; ++ ++ domain = amdgpu_mem_type_to_domain(bo->mem.mem_type); ++ if (domain == AMDGPU_GEM_DOMAIN_VRAM) ++ result = amdgpu_ttm_bo_access_vram(abo, offset, ++ buf, len, write); ++ else ++ result = amdgpu_ttm_bo_access_kmap(abo, offset, ++ buf, len, write); ++ amdgpu_bo_unreserve(abo); ++ ++ return len; ++} + + int amdgpu_bo_mmap(struct file *filp, struct vm_area_struct *vma, + struct ttm_bo_device *bdev) +@@ -1639,6 +1734,7 @@ int amdgpu_bo_mmap(struct file *filp, struct vm_area_struct *vma, + if (unlikely(ttm_vm_ops == NULL)) { + ttm_vm_ops = vma->vm_ops; + amdgpu_ttm_vm_ops = *ttm_vm_ops; ++ amdgpu_ttm_vm_ops.access = &amdgpu_ttm_vm_access; + } + vma->vm_ops = &amdgpu_ttm_vm_ops; + +-- +2.7.4 + |