leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/radeon: add GART debugfs access v3

Browse Source 
v2: add default_llseek
v3: set inode size in the open callback

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2013-12-18 21:07:40 +01:00 committed by Alex Deucher
parent 2014b56941
commit dd66d20e39
2 changed files with 64 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/radeon/radeon.h
View File

@ -416,6 +416,7 @@ struct radeon_mman {
#if defined(CONFIG_DEBUG_FS)
struct dentry *vram;
struct dentry *gtt;
#endif
};

63
drivers/gpu/drm/radeon/radeon_ttm.c
View File

@ -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
}