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drm/i915: introduce i915_error_state_buf_init 

Make function for struct i915_error_state_buf initialization
and export it, for sysfs and debugfs.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Mika Kuoppala 2013-06-06 15:18:41 +03:00 committed by Daniel Vetter
parent 95d5bfb3ac
commit 4dc955f7f5
2 changed files with 42 additions and 25 deletions
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60
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1028,6 +1028,36 @@ static int i915_error_state_release(struct inode *inode, struct file *file)
return 0;
}
int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
size_t count, loff_t pos)
{
memset(ebuf, 0, sizeof(*ebuf));
/* We need to have enough room to store any i915_error_state printf
* so that we can move it to start position.
*/
ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
ebuf->buf = kmalloc(ebuf->size,
GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
if (ebuf->buf == NULL) {
ebuf->size = PAGE_SIZE;
ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
}
if (ebuf->buf == NULL) {
ebuf->size = 128;
ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
}
if (ebuf->buf == NULL)
return -ENOMEM;
ebuf->start = pos;
return 0;
}
static ssize_t i915_error_state_read(struct file *file, char __user *userbuf,
size_t count, loff_t *pos)
{
@ -1035,31 +1065,11 @@ static ssize_t i915_error_state_read(struct file *file, char __user *userbuf,
struct drm_i915_error_state_buf error_str;
loff_t tmp_pos = 0;
ssize_t ret_count = 0;
int ret = 0;
int ret;
memset(&error_str, 0, sizeof(error_str));
/* We need to have enough room to store any i915_error_state printf
* so that we can move it to start position.
*/
error_str.size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
error_str.buf = kmalloc(error_str.size,
GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
if (error_str.buf == NULL) {
error_str.size = PAGE_SIZE;
error_str.buf = kmalloc(error_str.size, GFP_TEMPORARY);
}
if (error_str.buf == NULL) {
error_str.size = 128;
error_str.buf = kmalloc(error_str.size, GFP_TEMPORARY);
}
if (error_str.buf == NULL)
return -ENOMEM;
error_str.start = *pos;
ret = i915_error_state_buf_init(&error_str, count, *pos);
if (ret)
return ret;
ret = i915_error_state_to_str(&error_str, error_priv);
if (ret)
@ -1074,7 +1084,7 @@ static ssize_t i915_error_state_read(struct file *file, char __user *userbuf,
else
*pos = error_str.start + ret_count;
out:
kfree(error_str.buf);
i915_error_state_buf_release(&error_str);
return ret ?: ret_count;
}

7
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1931,6 +1931,13 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *estr,
void i915_error_state_get(struct drm_device *dev,
struct i915_error_state_file_priv *error_priv);
void i915_error_state_put(struct i915_error_state_file_priv *error_priv);
int i915_error_state_buf_init(struct drm_i915_error_state_buf *eb,
size_t count, loff_t pos);
static inline void i915_error_state_buf_release(
struct drm_i915_error_state_buf *eb)
{
kfree(eb->buf);
}
/* i915_suspend.c */
extern int i915_save_state(struct drm_device *dev);