diff options
Diffstat (limited to 'meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0878-drm-amd-amdgpu-Add-write-method-to-VRAM-debugfs-entr.patch')
-rw-r--r-- | meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0878-drm-amd-amdgpu-Add-write-method-to-VRAM-debugfs-entr.patch | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0878-drm-amd-amdgpu-Add-write-method-to-VRAM-debugfs-entr.patch b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0878-drm-amd-amdgpu-Add-write-method-to-VRAM-debugfs-entr.patch deleted file mode 100644 index e4e15e21..00000000 --- a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0878-drm-amd-amdgpu-Add-write-method-to-VRAM-debugfs-entr.patch +++ /dev/null @@ -1,80 +0,0 @@ -From f203e0f5d119a7ebab00cbf837876cc475830ae6 Mon Sep 17 00:00:00 2001 -From: Tom St Denis <tom.stdenis@amd.com> -Date: Tue, 29 Aug 2017 08:36:52 -0400 -Subject: [PATCH 0878/4131] drm/amd/amdgpu: Add write() method to VRAM debugfs - entry (v2) -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Allows writing data to vram via debugfs. - -Signed-off-by: Tom St Denis <tom.stdenis@amd.com> -Reviewed-by: Christian König <christian.koenig@amd.com> - -(v2): Call get_user before holding spinlock. - -Signed-off-by: Alex Deucher <alexander.deucher@amd.com> ---- - drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 42 ++++++++++++++++++++++++++++++++- - 1 file changed, 41 insertions(+), 1 deletion(-) - -diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c -index d2431cc..bbe7d2b 100644 ---- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c -+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c -@@ -1914,10 +1914,50 @@ static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf, - return result; - } - -+static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf, -+ size_t size, loff_t *pos) -+{ -+ struct amdgpu_device *adev = file_inode(f)->i_private; -+ ssize_t result = 0; -+ int r; -+ -+ if (size & 0x3 || *pos & 0x3) -+ return -EINVAL; -+ -+ if (*pos >= adev->mc.mc_vram_size) -+ return -ENXIO; -+ -+ while (size) { -+ unsigned long flags; -+ uint32_t value; -+ -+ if (*pos >= adev->mc.mc_vram_size) -+ return result; -+ -+ r = get_user(value, (uint32_t *)buf); -+ if (r) -+ return r; -+ -+ spin_lock_irqsave(&adev->mmio_idx_lock, flags); -+ WREG32(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000); -+ WREG32(mmMM_INDEX_HI, *pos >> 31); -+ WREG32(mmMM_DATA, value); -+ spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); -+ -+ result += 4; -+ buf += 4; -+ *pos += 4; -+ size -= 4; -+ } -+ -+ return result; -+} -+ - static const struct file_operations amdgpu_ttm_vram_fops = { - .owner = THIS_MODULE, - .read = amdgpu_ttm_vram_read, -- .llseek = default_llseek -+ .write = amdgpu_ttm_vram_write, -+ .llseek = default_llseek, - }; - - #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS --- -2.7.4 - |