From: Christian König Date: Wed, 18 Dec 2013 20:07:40 +0000 (+0100) Subject: drm/radeon: add GART debugfs access v3 X-Git-Tag: Ubuntu-5.2.0-15.16~14097^2~41^2~44 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=dd66d20e39292e94ea9e210872ef76e5dc1cc688;p=mirror_ubuntu-eoan-kernel.git drm/radeon: add GART debugfs access v3 v2: add default_llseek v3: set inode size in the open callback Signed-off-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 49f210c14796..572476b61d89 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -416,6 +416,7 @@ struct radeon_mman { #if defined(CONFIG_DEBUG_FS) struct dentry *vram; + struct dentry *gtt; #endif }; diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index a29d7cbd62e7..77f5b0c3edb8 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -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 }