drm/radeon: add GART debugfs access v3 (dd66d20e) · Commits · 戴 / test

drivers/gpu/drm/radeon/radeon.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -416,6 +416,7 @@ struct radeon_mman {

		#if defined(CONFIG_DEBUG_FS)
		struct dentry *vram;
		struct dentry *gtt;
		#endif
		};

drivers/gpu/drm/radeon/radeon_ttm.c

+63 −0

Original line number	Diff line number	Diff line
		@@ -917,6 +917,60 @@ static const struct file_operations radeon_ttm_vram_fops = {
		.llseek = default_llseek
		};

		static int radeon_ttm_gtt_open(struct inode inode, struct file filep)
		{
		struct radeon_device *rdev = inode->i_private;
		i_size_write(inode, rdev->mc.gtt_size);
		filep->private_data = inode->i_private;
		return 0;
		}

		static ssize_t radeon_ttm_gtt_read(struct file f, char __user buf,
		size_t size, loff_t *pos)
		{
		struct radeon_device *rdev = f->private_data;
		ssize_t result = 0;
		int r;

		while (size) {
		loff_t p = *pos / PAGE_SIZE;
		unsigned off = *pos & ~PAGE_MASK;
		ssize_t cur_size = min(size, PAGE_SIZE - off);
		struct page *page;
		void *ptr;

		if (p >= rdev->gart.num_cpu_pages)
		return result;

		page = rdev->gart.pages[p];
		if (page) {
		ptr = kmap(page);
		ptr += off;

		r = copy_to_user(buf, ptr, cur_size);
		kunmap(rdev->gart.pages[p]);
		} else
		r = clear_user(buf, cur_size);

		if (r)
		return -EFAULT;

		result += cur_size;
		buf += cur_size;
		*pos += cur_size;
		size -= cur_size;
		}

		return result;
		}

		static const struct file_operations radeon_ttm_gtt_fops = {
		.owner = THIS_MODULE,
		.open = radeon_ttm_gtt_open,
		.read = radeon_ttm_gtt_read,
		.llseek = default_llseek
		};

		#endif

		static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
		@@ -933,6 +987,12 @@ static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
		return PTR_ERR(ent);
		rdev->mman.vram = ent;

		ent = debugfs_create_file("radeon_gtt", S_IFREG \| S_IRUGO, root,
		rdev, &radeon_ttm_gtt_fops);
		if (IS_ERR(ent))
		return PTR_ERR(ent);
		rdev->mman.gtt = ent;

		count = ARRAY_SIZE(radeon_ttm_debugfs_list);

		#ifdef CONFIG_SWIOTLB
		@@ -953,5 +1013,8 @@ static void radeon_ttm_debugfs_fini(struct radeon_device *rdev)

		debugfs_remove(rdev->mman.vram);
		rdev->mman.vram = NULL;

		debugfs_remove(rdev->mman.gtt);
		rdev->mman.gtt = NULL;
		#endif
		}

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