* [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t
@ 2018-05-27 0:45 Souptick Joarder
2018-06-04 5:17 ` Souptick Joarder
0 siblings, 1 reply; 5+ messages in thread
From: Souptick Joarder @ 2018-05-27 0:45 UTC (permalink / raw)
To: willy, patrik.r.jakobsson, airlied; +Cc: dri-devel, linux-kernel
Use new return type vm_fault_t for fault handler. For
now, this is just documenting that the function returns
a VM_FAULT value rather than an errno. Once all instances
are converted, vm_fault_t will become a distinct type.
Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
Previously vm_insert_{pfn,mixed} returns err which driver
mapped into VM_FAULT_* type. The new function
vmf_insert_{pfn,mixed} will replace this inefficiency by
returning VM_FAULT_* type.
vmf_error() is the newly introduce inline function
in 4.17-rc6.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
---
v2: updated the change log
v3: Fixed kbuild error
drivers/gpu/drm/gma500/framebuffer.c | 14 +++++---------
drivers/gpu/drm/gma500/gem.c | 27 ++++++++++-----------------
drivers/gpu/drm/gma500/psb_drv.h | 3 ++-
3 files changed, 17 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index cb0a2ae..632aadb 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -111,7 +111,7 @@ static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
return 0;
}
-static int psbfb_vm_fault(struct vm_fault *vmf)
+static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct psb_framebuffer *psbfb = vma->vm_private_data;
@@ -120,7 +120,7 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
int page_num;
int i;
unsigned long address;
- int ret;
+ vm_fault_t ret = VM_FAULT_SIGBUS;
unsigned long pfn;
unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
psbfb->gtt->offset;
@@ -133,18 +133,14 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
for (i = 0; i < page_num; i++) {
pfn = (phys_addr >> PAGE_SHIFT);
- ret = vm_insert_mixed(vma, address,
+ ret = vmf_insert_mixed(vma, address,
__pfn_to_pfn_t(pfn, PFN_DEV));
- if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
+ if (unlikely(ret & VM_FAULT_ERROR))
break;
- else if (unlikely(ret != 0)) {
- ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
- return ret;
- }
address += PAGE_SIZE;
phys_addr += PAGE_SIZE;
}
- return VM_FAULT_NOPAGE;
+ return ret;
}
static void psbfb_vm_open(struct vm_area_struct *vma)
diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index 1312397..e7be5c9 100644
--- a/drivers/gpu/drm/gma500/gem.c
+++ b/drivers/gpu/drm/gma500/gem.c
@@ -134,12 +134,13 @@ int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
* vma->vm_private_data points to the GEM object that is backing this
* mapping.
*/
-int psb_gem_fault(struct vm_fault *vmf)
+vm_fault_t psb_gem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct drm_gem_object *obj;
struct gtt_range *r;
- int ret;
+ int err;
+ vm_fault_t ret;
unsigned long pfn;
pgoff_t page_offset;
struct drm_device *dev;
@@ -158,9 +159,10 @@ int psb_gem_fault(struct vm_fault *vmf)
/* For now the mmap pins the object and it stays pinned. As things
stand that will do us no harm */
if (r->mmapping == 0) {
- ret = psb_gtt_pin(r);
- if (ret < 0) {
- dev_err(dev->dev, "gma500: pin failed: %d\n", ret);
+ err = psb_gtt_pin(r);
+ if (err < 0) {
+ dev_err(dev->dev, "gma500: pin failed: %d\n", err);
+ ret = vmf_error(err);
goto fail;
}
r->mmapping = 1;
@@ -175,18 +177,9 @@ int psb_gem_fault(struct vm_fault *vmf)
pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT;
else
pfn = page_to_pfn(r->pages[page_offset]);
- ret = vm_insert_pfn(vma, vmf->address, pfn);
-
+ ret = vmf_insert_pfn(vma, vmf->address, pfn);
fail:
mutex_unlock(&dev_priv->mmap_mutex);
- switch (ret) {
- case 0:
- case -ERESTARTSYS:
- case -EINTR:
- return VM_FAULT_NOPAGE;
- case -ENOMEM:
- return VM_FAULT_OOM;
- default:
- return VM_FAULT_SIGBUS;
- }
+
+ return ret;
}
diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
index e8300f5..93d2f40 100644
--- a/drivers/gpu/drm/gma500/psb_drv.h
+++ b/drivers/gpu/drm/gma500/psb_drv.h
@@ -21,6 +21,7 @@
#define _PSB_DRV_H_
#include <linux/kref.h>
+#include <linux/mm_types.h>
#include <drm/drmP.h>
#include <drm/drm_global.h>
@@ -749,7 +750,7 @@ extern int psb_gem_get_aperture(struct drm_device *dev, void *data,
struct drm_file *file);
extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
-extern int psb_gem_fault(struct vm_fault *vmf);
+extern vm_fault_t psb_gem_fault(struct vm_fault *vmf);
/* psb_device.c */
extern const struct psb_ops psb_chip_ops;
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t
2018-05-27 0:45 [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t Souptick Joarder
@ 2018-06-04 5:17 ` Souptick Joarder
2018-06-14 19:12 ` Souptick Joarder
0 siblings, 1 reply; 5+ messages in thread
From: Souptick Joarder @ 2018-06-04 5:17 UTC (permalink / raw)
To: Matthew Wilcox, Patrik Jakobsson, airlied; +Cc: dri-devel, linux-kernel
On Sun, May 27, 2018 at 6:15 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> Use new return type vm_fault_t for fault handler. For
> now, this is just documenting that the function returns
> a VM_FAULT value rather than an errno. Once all instances
> are converted, vm_fault_t will become a distinct type.
>
> Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>
> Previously vm_insert_{pfn,mixed} returns err which driver
> mapped into VM_FAULT_* type. The new function
> vmf_insert_{pfn,mixed} will replace this inefficiency by
> returning VM_FAULT_* type.
>
> vmf_error() is the newly introduce inline function
> in 4.17-rc6.
>
> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
> ---
> v2: updated the change log
>
> v3: Fixed kbuild error
>
> drivers/gpu/drm/gma500/framebuffer.c | 14 +++++---------
> drivers/gpu/drm/gma500/gem.c | 27 ++++++++++-----------------
> drivers/gpu/drm/gma500/psb_drv.h | 3 ++-
> 3 files changed, 17 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
> index cb0a2ae..632aadb 100644
> --- a/drivers/gpu/drm/gma500/framebuffer.c
> +++ b/drivers/gpu/drm/gma500/framebuffer.c
> @@ -111,7 +111,7 @@ static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
> return 0;
> }
>
> -static int psbfb_vm_fault(struct vm_fault *vmf)
> +static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
> {
> struct vm_area_struct *vma = vmf->vma;
> struct psb_framebuffer *psbfb = vma->vm_private_data;
> @@ -120,7 +120,7 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
> int page_num;
> int i;
> unsigned long address;
> - int ret;
> + vm_fault_t ret = VM_FAULT_SIGBUS;
> unsigned long pfn;
> unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
> psbfb->gtt->offset;
> @@ -133,18 +133,14 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
> for (i = 0; i < page_num; i++) {
> pfn = (phys_addr >> PAGE_SHIFT);
>
> - ret = vm_insert_mixed(vma, address,
> + ret = vmf_insert_mixed(vma, address,
> __pfn_to_pfn_t(pfn, PFN_DEV));
> - if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
> + if (unlikely(ret & VM_FAULT_ERROR))
> break;
> - else if (unlikely(ret != 0)) {
> - ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
> - return ret;
> - }
> address += PAGE_SIZE;
> phys_addr += PAGE_SIZE;
> }
> - return VM_FAULT_NOPAGE;
> + return ret;
> }
>
> static void psbfb_vm_open(struct vm_area_struct *vma)
> diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
> index 1312397..e7be5c9 100644
> --- a/drivers/gpu/drm/gma500/gem.c
> +++ b/drivers/gpu/drm/gma500/gem.c
> @@ -134,12 +134,13 @@ int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
> * vma->vm_private_data points to the GEM object that is backing this
> * mapping.
> */
> -int psb_gem_fault(struct vm_fault *vmf)
> +vm_fault_t psb_gem_fault(struct vm_fault *vmf)
> {
> struct vm_area_struct *vma = vmf->vma;
> struct drm_gem_object *obj;
> struct gtt_range *r;
> - int ret;
> + int err;
> + vm_fault_t ret;
> unsigned long pfn;
> pgoff_t page_offset;
> struct drm_device *dev;
> @@ -158,9 +159,10 @@ int psb_gem_fault(struct vm_fault *vmf)
> /* For now the mmap pins the object and it stays pinned. As things
> stand that will do us no harm */
> if (r->mmapping == 0) {
> - ret = psb_gtt_pin(r);
> - if (ret < 0) {
> - dev_err(dev->dev, "gma500: pin failed: %d\n", ret);
> + err = psb_gtt_pin(r);
> + if (err < 0) {
> + dev_err(dev->dev, "gma500: pin failed: %d\n", err);
> + ret = vmf_error(err);
> goto fail;
> }
> r->mmapping = 1;
> @@ -175,18 +177,9 @@ int psb_gem_fault(struct vm_fault *vmf)
> pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT;
> else
> pfn = page_to_pfn(r->pages[page_offset]);
> - ret = vm_insert_pfn(vma, vmf->address, pfn);
> -
> + ret = vmf_insert_pfn(vma, vmf->address, pfn);
> fail:
> mutex_unlock(&dev_priv->mmap_mutex);
> - switch (ret) {
> - case 0:
> - case -ERESTARTSYS:
> - case -EINTR:
> - return VM_FAULT_NOPAGE;
> - case -ENOMEM:
> - return VM_FAULT_OOM;
> - default:
> - return VM_FAULT_SIGBUS;
> - }
> +
> + return ret;
> }
> diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
> index e8300f5..93d2f40 100644
> --- a/drivers/gpu/drm/gma500/psb_drv.h
> +++ b/drivers/gpu/drm/gma500/psb_drv.h
> @@ -21,6 +21,7 @@
> #define _PSB_DRV_H_
>
> #include <linux/kref.h>
> +#include <linux/mm_types.h>
>
> #include <drm/drmP.h>
> #include <drm/drm_global.h>
> @@ -749,7 +750,7 @@ extern int psb_gem_get_aperture(struct drm_device *dev, void *data,
> struct drm_file *file);
> extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
> struct drm_mode_create_dumb *args);
> -extern int psb_gem_fault(struct vm_fault *vmf);
> +extern vm_fault_t psb_gem_fault(struct vm_fault *vmf);
>
> /* psb_device.c */
> extern const struct psb_ops psb_chip_ops;
> --
> 1.9.1
>
If no comment, we would like to get this patch
in 4.18.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t
2018-06-04 5:17 ` Souptick Joarder
@ 2018-06-14 19:12 ` Souptick Joarder
2018-07-03 6:16 ` Souptick Joarder
0 siblings, 1 reply; 5+ messages in thread
From: Souptick Joarder @ 2018-06-14 19:12 UTC (permalink / raw)
To: Matthew Wilcox, Patrik Jakobsson, airlied; +Cc: dri-devel, linux-kernel
On Mon, Jun 4, 2018 at 10:47 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> On Sun, May 27, 2018 at 6:15 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
>> Use new return type vm_fault_t for fault handler. For
>> now, this is just documenting that the function returns
>> a VM_FAULT value rather than an errno. Once all instances
>> are converted, vm_fault_t will become a distinct type.
>>
>> Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>>
>> Previously vm_insert_{pfn,mixed} returns err which driver
>> mapped into VM_FAULT_* type. The new function
>> vmf_insert_{pfn,mixed} will replace this inefficiency by
>> returning VM_FAULT_* type.
>>
>> vmf_error() is the newly introduce inline function
>> in 4.17-rc6.
>>
>> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
>> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
>> ---
>> v2: updated the change log
>>
>> v3: Fixed kbuild error
>>
>> drivers/gpu/drm/gma500/framebuffer.c | 14 +++++---------
>> drivers/gpu/drm/gma500/gem.c | 27 ++++++++++-----------------
>> drivers/gpu/drm/gma500/psb_drv.h | 3 ++-
>> 3 files changed, 17 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
>> index cb0a2ae..632aadb 100644
>> --- a/drivers/gpu/drm/gma500/framebuffer.c
>> +++ b/drivers/gpu/drm/gma500/framebuffer.c
>> @@ -111,7 +111,7 @@ static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
>> return 0;
>> }
>>
>> -static int psbfb_vm_fault(struct vm_fault *vmf)
>> +static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
>> {
>> struct vm_area_struct *vma = vmf->vma;
>> struct psb_framebuffer *psbfb = vma->vm_private_data;
>> @@ -120,7 +120,7 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
>> int page_num;
>> int i;
>> unsigned long address;
>> - int ret;
>> + vm_fault_t ret = VM_FAULT_SIGBUS;
>> unsigned long pfn;
>> unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
>> psbfb->gtt->offset;
>> @@ -133,18 +133,14 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
>> for (i = 0; i < page_num; i++) {
>> pfn = (phys_addr >> PAGE_SHIFT);
>>
>> - ret = vm_insert_mixed(vma, address,
>> + ret = vmf_insert_mixed(vma, address,
>> __pfn_to_pfn_t(pfn, PFN_DEV));
>> - if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
>> + if (unlikely(ret & VM_FAULT_ERROR))
>> break;
>> - else if (unlikely(ret != 0)) {
>> - ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
>> - return ret;
>> - }
>> address += PAGE_SIZE;
>> phys_addr += PAGE_SIZE;
>> }
>> - return VM_FAULT_NOPAGE;
>> + return ret;
>> }
>>
>> static void psbfb_vm_open(struct vm_area_struct *vma)
>> diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
>> index 1312397..e7be5c9 100644
>> --- a/drivers/gpu/drm/gma500/gem.c
>> +++ b/drivers/gpu/drm/gma500/gem.c
>> @@ -134,12 +134,13 @@ int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>> * vma->vm_private_data points to the GEM object that is backing this
>> * mapping.
>> */
>> -int psb_gem_fault(struct vm_fault *vmf)
>> +vm_fault_t psb_gem_fault(struct vm_fault *vmf)
>> {
>> struct vm_area_struct *vma = vmf->vma;
>> struct drm_gem_object *obj;
>> struct gtt_range *r;
>> - int ret;
>> + int err;
>> + vm_fault_t ret;
>> unsigned long pfn;
>> pgoff_t page_offset;
>> struct drm_device *dev;
>> @@ -158,9 +159,10 @@ int psb_gem_fault(struct vm_fault *vmf)
>> /* For now the mmap pins the object and it stays pinned. As things
>> stand that will do us no harm */
>> if (r->mmapping == 0) {
>> - ret = psb_gtt_pin(r);
>> - if (ret < 0) {
>> - dev_err(dev->dev, "gma500: pin failed: %d\n", ret);
>> + err = psb_gtt_pin(r);
>> + if (err < 0) {
>> + dev_err(dev->dev, "gma500: pin failed: %d\n", err);
>> + ret = vmf_error(err);
>> goto fail;
>> }
>> r->mmapping = 1;
>> @@ -175,18 +177,9 @@ int psb_gem_fault(struct vm_fault *vmf)
>> pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT;
>> else
>> pfn = page_to_pfn(r->pages[page_offset]);
>> - ret = vm_insert_pfn(vma, vmf->address, pfn);
>> -
>> + ret = vmf_insert_pfn(vma, vmf->address, pfn);
>> fail:
>> mutex_unlock(&dev_priv->mmap_mutex);
>> - switch (ret) {
>> - case 0:
>> - case -ERESTARTSYS:
>> - case -EINTR:
>> - return VM_FAULT_NOPAGE;
>> - case -ENOMEM:
>> - return VM_FAULT_OOM;
>> - default:
>> - return VM_FAULT_SIGBUS;
>> - }
>> +
>> + return ret;
>> }
>> diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
>> index e8300f5..93d2f40 100644
>> --- a/drivers/gpu/drm/gma500/psb_drv.h
>> +++ b/drivers/gpu/drm/gma500/psb_drv.h
>> @@ -21,6 +21,7 @@
>> #define _PSB_DRV_H_
>>
>> #include <linux/kref.h>
>> +#include <linux/mm_types.h>
>>
>> #include <drm/drmP.h>
>> #include <drm/drm_global.h>
>> @@ -749,7 +750,7 @@ extern int psb_gem_get_aperture(struct drm_device *dev, void *data,
>> struct drm_file *file);
>> extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>> struct drm_mode_create_dumb *args);
>> -extern int psb_gem_fault(struct vm_fault *vmf);
>> +extern vm_fault_t psb_gem_fault(struct vm_fault *vmf);
>>
>> /* psb_device.c */
>> extern const struct psb_ops psb_chip_ops;
>> --
>> 1.9.1
>>
>
> If no comment, we would like to get this patch
> in 4.18.
Patrik, Is it possible to get this patch in 4.18 ?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t
2018-06-14 19:12 ` Souptick Joarder
@ 2018-07-03 6:16 ` Souptick Joarder
0 siblings, 0 replies; 5+ messages in thread
From: Souptick Joarder @ 2018-07-03 6:16 UTC (permalink / raw)
To: Matthew Wilcox, Patrik Jakobsson, airlied; +Cc: dri-devel, linux-kernel
On Fri, Jun 15, 2018 at 12:42 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> On Mon, Jun 4, 2018 at 10:47 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
>> On Sun, May 27, 2018 at 6:15 AM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
>>> Use new return type vm_fault_t for fault handler. For
>>> now, this is just documenting that the function returns
>>> a VM_FAULT value rather than an errno. Once all instances
>>> are converted, vm_fault_t will become a distinct type.
>>>
>>> Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>>>
>>> Previously vm_insert_{pfn,mixed} returns err which driver
>>> mapped into VM_FAULT_* type. The new function
>>> vmf_insert_{pfn,mixed} will replace this inefficiency by
>>> returning VM_FAULT_* type.
>>>
>>> vmf_error() is the newly introduce inline function
>>> in 4.17-rc6.
>>>
>>> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
>>> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
>>> ---
>>> v2: updated the change log
>>>
>>> v3: Fixed kbuild error
>>>
>>> drivers/gpu/drm/gma500/framebuffer.c | 14 +++++---------
>>> drivers/gpu/drm/gma500/gem.c | 27 ++++++++++-----------------
>>> drivers/gpu/drm/gma500/psb_drv.h | 3 ++-
>>> 3 files changed, 17 insertions(+), 27 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
>>> index cb0a2ae..632aadb 100644
>>> --- a/drivers/gpu/drm/gma500/framebuffer.c
>>> +++ b/drivers/gpu/drm/gma500/framebuffer.c
>>> @@ -111,7 +111,7 @@ static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
>>> return 0;
>>> }
>>>
>>> -static int psbfb_vm_fault(struct vm_fault *vmf)
>>> +static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
>>> {
>>> struct vm_area_struct *vma = vmf->vma;
>>> struct psb_framebuffer *psbfb = vma->vm_private_data;
>>> @@ -120,7 +120,7 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
>>> int page_num;
>>> int i;
>>> unsigned long address;
>>> - int ret;
>>> + vm_fault_t ret = VM_FAULT_SIGBUS;
>>> unsigned long pfn;
>>> unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
>>> psbfb->gtt->offset;
>>> @@ -133,18 +133,14 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
>>> for (i = 0; i < page_num; i++) {
>>> pfn = (phys_addr >> PAGE_SHIFT);
>>>
>>> - ret = vm_insert_mixed(vma, address,
>>> + ret = vmf_insert_mixed(vma, address,
>>> __pfn_to_pfn_t(pfn, PFN_DEV));
>>> - if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
>>> + if (unlikely(ret & VM_FAULT_ERROR))
>>> break;
>>> - else if (unlikely(ret != 0)) {
>>> - ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
>>> - return ret;
>>> - }
>>> address += PAGE_SIZE;
>>> phys_addr += PAGE_SIZE;
>>> }
>>> - return VM_FAULT_NOPAGE;
>>> + return ret;
>>> }
>>>
>>> static void psbfb_vm_open(struct vm_area_struct *vma)
>>> diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
>>> index 1312397..e7be5c9 100644
>>> --- a/drivers/gpu/drm/gma500/gem.c
>>> +++ b/drivers/gpu/drm/gma500/gem.c
>>> @@ -134,12 +134,13 @@ int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>>> * vma->vm_private_data points to the GEM object that is backing this
>>> * mapping.
>>> */
>>> -int psb_gem_fault(struct vm_fault *vmf)
>>> +vm_fault_t psb_gem_fault(struct vm_fault *vmf)
>>> {
>>> struct vm_area_struct *vma = vmf->vma;
>>> struct drm_gem_object *obj;
>>> struct gtt_range *r;
>>> - int ret;
>>> + int err;
>>> + vm_fault_t ret;
>>> unsigned long pfn;
>>> pgoff_t page_offset;
>>> struct drm_device *dev;
>>> @@ -158,9 +159,10 @@ int psb_gem_fault(struct vm_fault *vmf)
>>> /* For now the mmap pins the object and it stays pinned. As things
>>> stand that will do us no harm */
>>> if (r->mmapping == 0) {
>>> - ret = psb_gtt_pin(r);
>>> - if (ret < 0) {
>>> - dev_err(dev->dev, "gma500: pin failed: %d\n", ret);
>>> + err = psb_gtt_pin(r);
>>> + if (err < 0) {
>>> + dev_err(dev->dev, "gma500: pin failed: %d\n", err);
>>> + ret = vmf_error(err);
>>> goto fail;
>>> }
>>> r->mmapping = 1;
>>> @@ -175,18 +177,9 @@ int psb_gem_fault(struct vm_fault *vmf)
>>> pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT;
>>> else
>>> pfn = page_to_pfn(r->pages[page_offset]);
>>> - ret = vm_insert_pfn(vma, vmf->address, pfn);
>>> -
>>> + ret = vmf_insert_pfn(vma, vmf->address, pfn);
>>> fail:
>>> mutex_unlock(&dev_priv->mmap_mutex);
>>> - switch (ret) {
>>> - case 0:
>>> - case -ERESTARTSYS:
>>> - case -EINTR:
>>> - return VM_FAULT_NOPAGE;
>>> - case -ENOMEM:
>>> - return VM_FAULT_OOM;
>>> - default:
>>> - return VM_FAULT_SIGBUS;
>>> - }
>>> +
>>> + return ret;
>>> }
>>> diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
>>> index e8300f5..93d2f40 100644
>>> --- a/drivers/gpu/drm/gma500/psb_drv.h
>>> +++ b/drivers/gpu/drm/gma500/psb_drv.h
>>> @@ -21,6 +21,7 @@
>>> #define _PSB_DRV_H_
>>>
>>> #include <linux/kref.h>
>>> +#include <linux/mm_types.h>
>>>
>>> #include <drm/drmP.h>
>>> #include <drm/drm_global.h>
>>> @@ -749,7 +750,7 @@ extern int psb_gem_get_aperture(struct drm_device *dev, void *data,
>>> struct drm_file *file);
>>> extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>>> struct drm_mode_create_dumb *args);
>>> -extern int psb_gem_fault(struct vm_fault *vmf);
>>> +extern vm_fault_t psb_gem_fault(struct vm_fault *vmf);
>>>
>>> /* psb_device.c */
>>> extern const struct psb_ops psb_chip_ops;
>>> --
>>> 1.9.1
>>>
>>
>> If no comment, we would like to get this patch
>> in 4.18.
>
> Patrik, Is it possible to get this patch in 4.18 ?
Can we get this patch in queue for 4.19 ?
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t
@ 2018-07-13 15:45 Souptick Joarder
0 siblings, 0 replies; 5+ messages in thread
From: Souptick Joarder @ 2018-07-13 15:45 UTC (permalink / raw)
To: akpm; +Cc: patrik.r.jakobsson, airlied, dri-devel, linux-kernel, willy
Use new return type vm_fault_t for fault handler. For
now, this is just documenting that the function returns
a VM_FAULT value rather than an errno. Once all instances
are converted, vm_fault_t will become a distinct type.
Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
Previously vm_insert_{pfn,mixed} returns err which driver
mapped into VM_FAULT_* type. The new function
vmf_insert_{pfn,mixed} will replace this inefficiency by
returning VM_FAULT_* type.
vmf_error() is the newly introduce inline function
in 4.17-rc6.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
---
v2: updated the change log
v3: Fixed kbuild error
drivers/gpu/drm/gma500/framebuffer.c | 14 +++++---------
drivers/gpu/drm/gma500/gem.c | 27 ++++++++++-----------------
drivers/gpu/drm/gma500/psb_drv.h | 3 ++-
3 files changed, 17 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index cb0a2ae..632aadb 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -111,7 +111,7 @@ static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
return 0;
}
-static int psbfb_vm_fault(struct vm_fault *vmf)
+static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct psb_framebuffer *psbfb = vma->vm_private_data;
@@ -120,7 +120,7 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
int page_num;
int i;
unsigned long address;
- int ret;
+ vm_fault_t ret = VM_FAULT_SIGBUS;
unsigned long pfn;
unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
psbfb->gtt->offset;
@@ -133,18 +133,14 @@ static int psbfb_vm_fault(struct vm_fault *vmf)
for (i = 0; i < page_num; i++) {
pfn = (phys_addr >> PAGE_SHIFT);
- ret = vm_insert_mixed(vma, address,
+ ret = vmf_insert_mixed(vma, address,
__pfn_to_pfn_t(pfn, PFN_DEV));
- if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
+ if (unlikely(ret & VM_FAULT_ERROR))
break;
- else if (unlikely(ret != 0)) {
- ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
- return ret;
- }
address += PAGE_SIZE;
phys_addr += PAGE_SIZE;
}
- return VM_FAULT_NOPAGE;
+ return ret;
}
static void psbfb_vm_open(struct vm_area_struct *vma)
diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index 1312397..e7be5c9 100644
--- a/drivers/gpu/drm/gma500/gem.c
+++ b/drivers/gpu/drm/gma500/gem.c
@@ -134,12 +134,13 @@ int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
* vma->vm_private_data points to the GEM object that is backing this
* mapping.
*/
-int psb_gem_fault(struct vm_fault *vmf)
+vm_fault_t psb_gem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct drm_gem_object *obj;
struct gtt_range *r;
- int ret;
+ int err;
+ vm_fault_t ret;
unsigned long pfn;
pgoff_t page_offset;
struct drm_device *dev;
@@ -158,9 +159,10 @@ int psb_gem_fault(struct vm_fault *vmf)
/* For now the mmap pins the object and it stays pinned. As things
stand that will do us no harm */
if (r->mmapping == 0) {
- ret = psb_gtt_pin(r);
- if (ret < 0) {
- dev_err(dev->dev, "gma500: pin failed: %d\n", ret);
+ err = psb_gtt_pin(r);
+ if (err < 0) {
+ dev_err(dev->dev, "gma500: pin failed: %d\n", err);
+ ret = vmf_error(err);
goto fail;
}
r->mmapping = 1;
@@ -175,18 +177,9 @@ int psb_gem_fault(struct vm_fault *vmf)
pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT;
else
pfn = page_to_pfn(r->pages[page_offset]);
- ret = vm_insert_pfn(vma, vmf->address, pfn);
-
+ ret = vmf_insert_pfn(vma, vmf->address, pfn);
fail:
mutex_unlock(&dev_priv->mmap_mutex);
- switch (ret) {
- case 0:
- case -ERESTARTSYS:
- case -EINTR:
- return VM_FAULT_NOPAGE;
- case -ENOMEM:
- return VM_FAULT_OOM;
- default:
- return VM_FAULT_SIGBUS;
- }
+
+ return ret;
}
diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
index e8300f5..93d2f40 100644
--- a/drivers/gpu/drm/gma500/psb_drv.h
+++ b/drivers/gpu/drm/gma500/psb_drv.h
@@ -21,6 +21,7 @@
#define _PSB_DRV_H_
#include <linux/kref.h>
+#include <linux/mm_types.h>
#include <drm/drmP.h>
#include <drm/drm_global.h>
@@ -749,7 +750,7 @@ extern int psb_gem_get_aperture(struct drm_device *dev, void *data,
struct drm_file *file);
extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
-extern int psb_gem_fault(struct vm_fault *vmf);
+extern vm_fault_t psb_gem_fault(struct vm_fault *vmf);
/* psb_device.c */
extern const struct psb_ops psb_chip_ops;
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2018-07-13 15:43 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2018-05-27 0:45 [PATCH v3] gpu: drm: gma500: Change return type to vm_fault_t Souptick Joarder
2018-06-04 5:17 ` Souptick Joarder
2018-06-14 19:12 ` Souptick Joarder
2018-07-03 6:16 ` Souptick Joarder
2018-07-13 15:45 Souptick Joarder
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