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* [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-05-21 17:29 Souptick Joarder
  2018-05-28  7:08   ` Souptick Joarder
  0 siblings, 1 reply; 11+ messages in thread
From: Souptick Joarder @ 2018-05-21 17:29 UTC (permalink / raw)
  To: robdclark, airlied, willy; +Cc: linux-arm-msm, linux-kernel, freedreno

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_mixed() returns err which driver
mapped into VM_FAULT_* type. The new function 
vmf_insert_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>
---
 drivers/gpu/drm/msm/msm_drv.h |  3 ++-
 drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
 2 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 0a653dd..44b4ca7 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -33,6 +33,7 @@
 #include <linux/of_graph.h>
 #include <linux/of_device.h>
 #include <asm/sizes.h>
+#include <linux/mm_types.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_atomic.h>
@@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 int msm_gem_mmap_obj(struct drm_gem_object *obj,
 			struct vm_area_struct *vma);
 int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-int msm_gem_fault(struct vm_fault *vmf);
+vm_fault_t msm_gem_fault(struct vm_fault *vmf);
 uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
 int msm_gem_get_iova(struct drm_gem_object *obj,
 		struct msm_gem_address_space *aspace, uint64_t *iova);
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 07376de..27a5ab5 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	return msm_gem_mmap_obj(vma->vm_private_data, vma);
 }
 
-int msm_gem_fault(struct vm_fault *vmf)
+vm_fault_t msm_gem_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 	struct drm_gem_object *obj = vma->vm_private_data;
@@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
 	struct page **pages;
 	unsigned long pfn;
 	pgoff_t pgoff;
-	int ret;
+	int err;
+	vm_fault_t ret;
 
 	/*
 	 * vm_ops.open/drm_gem_mmap_obj and close get and put
 	 * a reference on obj. So, we dont need to hold one here.
 	 */
-	ret = mutex_lock_interruptible(&msm_obj->lock);
-	if (ret)
+	err = mutex_lock_interruptible(&msm_obj->lock);
+	if (err) {
+		ret = VM_FAULT_NOPAGE;
 		goto out;
+	}
 
 	if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
 		mutex_unlock(&msm_obj->lock);
@@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
 	/* make sure we have pages attached now */
 	pages = get_pages(obj);
 	if (IS_ERR(pages)) {
-		ret = PTR_ERR(pages);
+		ret = vmf_error(PTR_ERR(pages));
 		goto out_unlock;
 	}
 
@@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
 	VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
 			pfn, pfn << PAGE_SHIFT);
 
-	ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
-
+	ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
 out_unlock:
 	mutex_unlock(&msm_obj->lock);
 out:
-	switch (ret) {
-	case -EAGAIN:
-	case 0:
-	case -ERESTARTSYS:
-	case -EINTR:
-	case -EBUSY:
-		/*
-		 * EBUSY is ok: this just means that another thread
-		 * already did the job.
-		 */
-		return VM_FAULT_NOPAGE;
-	case -ENOMEM:
-		return VM_FAULT_OOM;
-	default:
-		return VM_FAULT_SIGBUS;
-	}
+	return ret;
 }
 
 /** get mmap offset */
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
  2018-05-21 17:29 [PATCH] gpu: drm: msm: Change return type to vm_fault_t Souptick Joarder
@ 2018-05-28  7:08   ` Souptick Joarder
  0 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-05-28  7:08 UTC (permalink / raw)
  To: Rob Clark, airlied-cv59FeDIM0c, Matthew Wilcox
  Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA,
	freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA

On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
> mapped into VM_FAULT_* type. The new function
> vmf_insert_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>
> ---
>  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>  2 files changed, 12 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 0a653dd..44b4ca7 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -33,6 +33,7 @@
>  #include <linux/of_graph.h>
>  #include <linux/of_device.h>
>  #include <asm/sizes.h>
> +#include <linux/mm_types.h>
>
>  #include <drm/drmP.h>
>  #include <drm/drm_atomic.h>
> @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>                         struct vm_area_struct *vma);
>  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> -int msm_gem_fault(struct vm_fault *vmf);
> +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>  int msm_gem_get_iova(struct drm_gem_object *obj,
>                 struct msm_gem_address_space *aspace, uint64_t *iova);
> diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> index 07376de..27a5ab5 100644
> --- a/drivers/gpu/drm/msm/msm_gem.c
> +++ b/drivers/gpu/drm/msm/msm_gem.c
> @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>  }
>
> -int msm_gem_fault(struct vm_fault *vmf)
> +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_gem_object *obj = vma->vm_private_data;
> @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>         struct page **pages;
>         unsigned long pfn;
>         pgoff_t pgoff;
> -       int ret;
> +       int err;
> +       vm_fault_t ret;
>
>         /*
>          * vm_ops.open/drm_gem_mmap_obj and close get and put
>          * a reference on obj. So, we dont need to hold one here.
>          */
> -       ret = mutex_lock_interruptible(&msm_obj->lock);
> -       if (ret)
> +       err = mutex_lock_interruptible(&msm_obj->lock);
> +       if (err) {
> +               ret = VM_FAULT_NOPAGE;
>                 goto out;
> +       }
>
>         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>                 mutex_unlock(&msm_obj->lock);
> @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>         /* make sure we have pages attached now */
>         pages = get_pages(obj);
>         if (IS_ERR(pages)) {
> -               ret = PTR_ERR(pages);
> +               ret = vmf_error(PTR_ERR(pages));
>                 goto out_unlock;
>         }
>
> @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>                         pfn, pfn << PAGE_SHIFT);
>
> -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> -
> +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>  out_unlock:
>         mutex_unlock(&msm_obj->lock);
>  out:
> -       switch (ret) {
> -       case -EAGAIN:
> -       case 0:
> -       case -ERESTARTSYS:
> -       case -EINTR:
> -       case -EBUSY:
> -               /*
> -                * EBUSY is ok: this just means that another thread
> -                * already did the job.
> -                */
> -               return VM_FAULT_NOPAGE;
> -       case -ENOMEM:
> -               return VM_FAULT_OOM;
> -       default:
> -               return VM_FAULT_SIGBUS;
> -       }
> +       return ret;
>  }
>
>  /** get mmap offset */
> --
> 1.9.1
>

Any comment for this patch ?
_______________________________________________
Freedreno mailing list
Freedreno@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/freedreno

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-05-28  7:08   ` Souptick Joarder
  0 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-05-28  7:08 UTC (permalink / raw)
  To: Rob Clark, airlied, Matthew Wilcox; +Cc: linux-arm-msm, linux-kernel, freedreno

On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
> mapped into VM_FAULT_* type. The new function
> vmf_insert_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>
> ---
>  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>  2 files changed, 12 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 0a653dd..44b4ca7 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -33,6 +33,7 @@
>  #include <linux/of_graph.h>
>  #include <linux/of_device.h>
>  #include <asm/sizes.h>
> +#include <linux/mm_types.h>
>
>  #include <drm/drmP.h>
>  #include <drm/drm_atomic.h>
> @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>                         struct vm_area_struct *vma);
>  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> -int msm_gem_fault(struct vm_fault *vmf);
> +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>  int msm_gem_get_iova(struct drm_gem_object *obj,
>                 struct msm_gem_address_space *aspace, uint64_t *iova);
> diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> index 07376de..27a5ab5 100644
> --- a/drivers/gpu/drm/msm/msm_gem.c
> +++ b/drivers/gpu/drm/msm/msm_gem.c
> @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>  }
>
> -int msm_gem_fault(struct vm_fault *vmf)
> +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_gem_object *obj = vma->vm_private_data;
> @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>         struct page **pages;
>         unsigned long pfn;
>         pgoff_t pgoff;
> -       int ret;
> +       int err;
> +       vm_fault_t ret;
>
>         /*
>          * vm_ops.open/drm_gem_mmap_obj and close get and put
>          * a reference on obj. So, we dont need to hold one here.
>          */
> -       ret = mutex_lock_interruptible(&msm_obj->lock);
> -       if (ret)
> +       err = mutex_lock_interruptible(&msm_obj->lock);
> +       if (err) {
> +               ret = VM_FAULT_NOPAGE;
>                 goto out;
> +       }
>
>         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>                 mutex_unlock(&msm_obj->lock);
> @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>         /* make sure we have pages attached now */
>         pages = get_pages(obj);
>         if (IS_ERR(pages)) {
> -               ret = PTR_ERR(pages);
> +               ret = vmf_error(PTR_ERR(pages));
>                 goto out_unlock;
>         }
>
> @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>                         pfn, pfn << PAGE_SHIFT);
>
> -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> -
> +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>  out_unlock:
>         mutex_unlock(&msm_obj->lock);
>  out:
> -       switch (ret) {
> -       case -EAGAIN:
> -       case 0:
> -       case -ERESTARTSYS:
> -       case -EINTR:
> -       case -EBUSY:
> -               /*
> -                * EBUSY is ok: this just means that another thread
> -                * already did the job.
> -                */
> -               return VM_FAULT_NOPAGE;
> -       case -ENOMEM:
> -               return VM_FAULT_OOM;
> -       default:
> -               return VM_FAULT_SIGBUS;
> -       }
> +       return ret;
>  }
>
>  /** get mmap offset */
> --
> 1.9.1
>

Any comment for this patch ?

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
  2018-05-28  7:08   ` Souptick Joarder
@ 2018-05-31 17:59       ` Jordan Crouse
  -1 siblings, 0 replies; 11+ messages in thread
From: Jordan Crouse @ 2018-05-31 17:59 UTC (permalink / raw)
  To: Souptick Joarder
  Cc: airlied-cv59FeDIM0c, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA, Matthew Wilcox, Rob Clark,
	freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW

On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
> > mapped into VM_FAULT_* type. The new function
> > vmf_insert_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>
> > ---
> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
> >  2 files changed, 12 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> > index 0a653dd..44b4ca7 100644
> > --- a/drivers/gpu/drm/msm/msm_drv.h
> > +++ b/drivers/gpu/drm/msm/msm_drv.h
> > @@ -33,6 +33,7 @@
> >  #include <linux/of_graph.h>
> >  #include <linux/of_device.h>
> >  #include <asm/sizes.h>
> > +#include <linux/mm_types.h>
> >
> >  #include <drm/drmP.h>
> >  #include <drm/drm_atomic.h>
> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
> >                         struct vm_area_struct *vma);
> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> > -int msm_gem_fault(struct vm_fault *vmf);
> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
> >  int msm_gem_get_iova(struct drm_gem_object *obj,
> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> > index 07376de..27a5ab5 100644
> > --- a/drivers/gpu/drm/msm/msm_gem.c
> > +++ b/drivers/gpu/drm/msm/msm_gem.c
> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
> >  }
> >
> > -int msm_gem_fault(struct vm_fault *vmf)
> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
> >  {
> >         struct vm_area_struct *vma = vmf->vma;
> >         struct drm_gem_object *obj = vma->vm_private_data;
> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         struct page **pages;
> >         unsigned long pfn;
> >         pgoff_t pgoff;
> > -       int ret;
> > +       int err;
> > +       vm_fault_t ret;
> >
> >         /*
> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
> >          * a reference on obj. So, we dont need to hold one here.
> >          */
> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
> > -       if (ret)
> > +       err = mutex_lock_interruptible(&msm_obj->lock);
> > +       if (err) {
> > +               ret = VM_FAULT_NOPAGE;
> >                 goto out;
> > +       }
> >
> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
> >                 mutex_unlock(&msm_obj->lock);
> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         /* make sure we have pages attached now */
> >         pages = get_pages(obj);
> >         if (IS_ERR(pages)) {
> > -               ret = PTR_ERR(pages);
> > +               ret = vmf_error(PTR_ERR(pages));
> >                 goto out_unlock;
> >         }
> >
> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
> >                         pfn, pfn << PAGE_SHIFT);
> >
> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> > -
> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> >  out_unlock:
> >         mutex_unlock(&msm_obj->lock);
> >  out:
> > -       switch (ret) {
> > -       case -EAGAIN:
> > -       case 0:
> > -       case -ERESTARTSYS:
> > -       case -EINTR:
> > -       case -EBUSY:
> > -               /*
> > -                * EBUSY is ok: this just means that another thread
> > -                * already did the job.
> > -                */
> > -               return VM_FAULT_NOPAGE;
> > -       case -ENOMEM:
> > -               return VM_FAULT_OOM;
> > -       default:
> > -               return VM_FAULT_SIGBUS;
> > -       }
> > +       return ret;
> >  }
> >
> >  /** get mmap offset */
> > --
> > 1.9.1
> >
> 
> Any comment for this patch ?

Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
usual regression tests. LGTM.

Jordan

-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
_______________________________________________
Freedreno mailing list
Freedreno@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/freedreno

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [Freedreno] [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-05-31 17:59       ` Jordan Crouse
  0 siblings, 0 replies; 11+ messages in thread
From: Jordan Crouse @ 2018-05-31 17:59 UTC (permalink / raw)
  To: Souptick Joarder
  Cc: Rob Clark, airlied, Matthew Wilcox, linux-arm-msm, freedreno,
	linux-kernel

On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
> > mapped into VM_FAULT_* type. The new function
> > vmf_insert_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>
> > ---
> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
> >  2 files changed, 12 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> > index 0a653dd..44b4ca7 100644
> > --- a/drivers/gpu/drm/msm/msm_drv.h
> > +++ b/drivers/gpu/drm/msm/msm_drv.h
> > @@ -33,6 +33,7 @@
> >  #include <linux/of_graph.h>
> >  #include <linux/of_device.h>
> >  #include <asm/sizes.h>
> > +#include <linux/mm_types.h>
> >
> >  #include <drm/drmP.h>
> >  #include <drm/drm_atomic.h>
> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
> >                         struct vm_area_struct *vma);
> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> > -int msm_gem_fault(struct vm_fault *vmf);
> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
> >  int msm_gem_get_iova(struct drm_gem_object *obj,
> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> > index 07376de..27a5ab5 100644
> > --- a/drivers/gpu/drm/msm/msm_gem.c
> > +++ b/drivers/gpu/drm/msm/msm_gem.c
> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
> >  }
> >
> > -int msm_gem_fault(struct vm_fault *vmf)
> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
> >  {
> >         struct vm_area_struct *vma = vmf->vma;
> >         struct drm_gem_object *obj = vma->vm_private_data;
> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         struct page **pages;
> >         unsigned long pfn;
> >         pgoff_t pgoff;
> > -       int ret;
> > +       int err;
> > +       vm_fault_t ret;
> >
> >         /*
> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
> >          * a reference on obj. So, we dont need to hold one here.
> >          */
> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
> > -       if (ret)
> > +       err = mutex_lock_interruptible(&msm_obj->lock);
> > +       if (err) {
> > +               ret = VM_FAULT_NOPAGE;
> >                 goto out;
> > +       }
> >
> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
> >                 mutex_unlock(&msm_obj->lock);
> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         /* make sure we have pages attached now */
> >         pages = get_pages(obj);
> >         if (IS_ERR(pages)) {
> > -               ret = PTR_ERR(pages);
> > +               ret = vmf_error(PTR_ERR(pages));
> >                 goto out_unlock;
> >         }
> >
> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
> >                         pfn, pfn << PAGE_SHIFT);
> >
> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> > -
> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
> >  out_unlock:
> >         mutex_unlock(&msm_obj->lock);
> >  out:
> > -       switch (ret) {
> > -       case -EAGAIN:
> > -       case 0:
> > -       case -ERESTARTSYS:
> > -       case -EINTR:
> > -       case -EBUSY:
> > -               /*
> > -                * EBUSY is ok: this just means that another thread
> > -                * already did the job.
> > -                */
> > -               return VM_FAULT_NOPAGE;
> > -       case -ENOMEM:
> > -               return VM_FAULT_OOM;
> > -       default:
> > -               return VM_FAULT_SIGBUS;
> > -       }
> > +       return ret;
> >  }
> >
> >  /** get mmap offset */
> > --
> > 1.9.1
> >
> 
> Any comment for this patch ?

Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
usual regression tests. LGTM.

Jordan

-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
  2018-05-31 17:59       ` [Freedreno] " Jordan Crouse
@ 2018-05-31 18:53           ` Souptick Joarder
  -1 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-05-31 18:53 UTC (permalink / raw)
  To: Souptick Joarder, Rob Clark, airlied-cv59FeDIM0c, Matthew Wilcox,
	linux-arm-msm-u79uwXL29TY76Z2rM5mHXA,
	freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA

On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>> > mapped into VM_FAULT_* type. The new function
>> > vmf_insert_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>
>> > ---
>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> > index 0a653dd..44b4ca7 100644
>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>> > @@ -33,6 +33,7 @@
>> >  #include <linux/of_graph.h>
>> >  #include <linux/of_device.h>
>> >  #include <asm/sizes.h>
>> > +#include <linux/mm_types.h>
>> >
>> >  #include <drm/drmP.h>
>> >  #include <drm/drm_atomic.h>
>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>> >                         struct vm_area_struct *vma);
>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>> > -int msm_gem_fault(struct vm_fault *vmf);
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>> > index 07376de..27a5ab5 100644
>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>> >  }
>> >
>> > -int msm_gem_fault(struct vm_fault *vmf)
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>> >  {
>> >         struct vm_area_struct *vma = vmf->vma;
>> >         struct drm_gem_object *obj = vma->vm_private_data;
>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         struct page **pages;
>> >         unsigned long pfn;
>> >         pgoff_t pgoff;
>> > -       int ret;
>> > +       int err;
>> > +       vm_fault_t ret;
>> >
>> >         /*
>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>> >          * a reference on obj. So, we dont need to hold one here.
>> >          */
>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>> > -       if (ret)
>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>> > +       if (err) {
>> > +               ret = VM_FAULT_NOPAGE;
>> >                 goto out;
>> > +       }
>> >
>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>> >                 mutex_unlock(&msm_obj->lock);
>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         /* make sure we have pages attached now */
>> >         pages = get_pages(obj);
>> >         if (IS_ERR(pages)) {
>> > -               ret = PTR_ERR(pages);
>> > +               ret = vmf_error(PTR_ERR(pages));
>> >                 goto out_unlock;
>> >         }
>> >
>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>> >                         pfn, pfn << PAGE_SHIFT);
>> >
>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> > -
>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> >  out_unlock:
>> >         mutex_unlock(&msm_obj->lock);
>> >  out:
>> > -       switch (ret) {
>> > -       case -EAGAIN:
>> > -       case 0:
>> > -       case -ERESTARTSYS:
>> > -       case -EINTR:
>> > -       case -EBUSY:
>> > -               /*
>> > -                * EBUSY is ok: this just means that another thread
>> > -                * already did the job.
>> > -                */
>> > -               return VM_FAULT_NOPAGE;
>> > -       case -ENOMEM:
>> > -               return VM_FAULT_OOM;
>> > -       default:
>> > -               return VM_FAULT_SIGBUS;
>> > -       }
>> > +       return ret;
>> >  }
>> >
>> >  /** get mmap offset */
>> > --
>> > 1.9.1
>> >
>>
>> Any comment for this patch ?
>
> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
> usual regression tests. LGTM.
>
> Jordan
>

Thanks :)
_______________________________________________
Freedreno mailing list
Freedreno@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/freedreno

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [Freedreno] [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-05-31 18:53           ` Souptick Joarder
  0 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-05-31 18:53 UTC (permalink / raw)
  To: Souptick Joarder, Rob Clark, airlied, Matthew Wilcox,
	linux-arm-msm, freedreno, linux-kernel

On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>> > mapped into VM_FAULT_* type. The new function
>> > vmf_insert_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>
>> > ---
>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> > index 0a653dd..44b4ca7 100644
>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>> > @@ -33,6 +33,7 @@
>> >  #include <linux/of_graph.h>
>> >  #include <linux/of_device.h>
>> >  #include <asm/sizes.h>
>> > +#include <linux/mm_types.h>
>> >
>> >  #include <drm/drmP.h>
>> >  #include <drm/drm_atomic.h>
>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>> >                         struct vm_area_struct *vma);
>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>> > -int msm_gem_fault(struct vm_fault *vmf);
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>> > index 07376de..27a5ab5 100644
>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>> >  }
>> >
>> > -int msm_gem_fault(struct vm_fault *vmf)
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>> >  {
>> >         struct vm_area_struct *vma = vmf->vma;
>> >         struct drm_gem_object *obj = vma->vm_private_data;
>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         struct page **pages;
>> >         unsigned long pfn;
>> >         pgoff_t pgoff;
>> > -       int ret;
>> > +       int err;
>> > +       vm_fault_t ret;
>> >
>> >         /*
>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>> >          * a reference on obj. So, we dont need to hold one here.
>> >          */
>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>> > -       if (ret)
>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>> > +       if (err) {
>> > +               ret = VM_FAULT_NOPAGE;
>> >                 goto out;
>> > +       }
>> >
>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>> >                 mutex_unlock(&msm_obj->lock);
>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         /* make sure we have pages attached now */
>> >         pages = get_pages(obj);
>> >         if (IS_ERR(pages)) {
>> > -               ret = PTR_ERR(pages);
>> > +               ret = vmf_error(PTR_ERR(pages));
>> >                 goto out_unlock;
>> >         }
>> >
>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>> >                         pfn, pfn << PAGE_SHIFT);
>> >
>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> > -
>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> >  out_unlock:
>> >         mutex_unlock(&msm_obj->lock);
>> >  out:
>> > -       switch (ret) {
>> > -       case -EAGAIN:
>> > -       case 0:
>> > -       case -ERESTARTSYS:
>> > -       case -EINTR:
>> > -       case -EBUSY:
>> > -               /*
>> > -                * EBUSY is ok: this just means that another thread
>> > -                * already did the job.
>> > -                */
>> > -               return VM_FAULT_NOPAGE;
>> > -       case -ENOMEM:
>> > -               return VM_FAULT_OOM;
>> > -       default:
>> > -               return VM_FAULT_SIGBUS;
>> > -       }
>> > +       return ret;
>> >  }
>> >
>> >  /** get mmap offset */
>> > --
>> > 1.9.1
>> >
>>
>> Any comment for this patch ?
>
> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
> usual regression tests. LGTM.
>
> Jordan
>

Thanks :)

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
  2018-05-31 17:59       ` [Freedreno] " Jordan Crouse
@ 2018-06-18  3:40           ` Souptick Joarder
  -1 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-06-18  3:40 UTC (permalink / raw)
  To: Souptick Joarder, Rob Clark, airlied-cv59FeDIM0c, Matthew Wilcox,
	linux-arm-msm-u79uwXL29TY76Z2rM5mHXA,
	freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA,
	jcrouse-sgV2jX0FEOL9JmXXK+q4OQ

On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>> > mapped into VM_FAULT_* type. The new function
>> > vmf_insert_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>
>> > ---
>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> > index 0a653dd..44b4ca7 100644
>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>> > @@ -33,6 +33,7 @@
>> >  #include <linux/of_graph.h>
>> >  #include <linux/of_device.h>
>> >  #include <asm/sizes.h>
>> > +#include <linux/mm_types.h>
>> >
>> >  #include <drm/drmP.h>
>> >  #include <drm/drm_atomic.h>
>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>> >                         struct vm_area_struct *vma);
>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>> > -int msm_gem_fault(struct vm_fault *vmf);
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>> > index 07376de..27a5ab5 100644
>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>> >  }
>> >
>> > -int msm_gem_fault(struct vm_fault *vmf)
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>> >  {
>> >         struct vm_area_struct *vma = vmf->vma;
>> >         struct drm_gem_object *obj = vma->vm_private_data;
>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         struct page **pages;
>> >         unsigned long pfn;
>> >         pgoff_t pgoff;
>> > -       int ret;
>> > +       int err;
>> > +       vm_fault_t ret;
>> >
>> >         /*
>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>> >          * a reference on obj. So, we dont need to hold one here.
>> >          */
>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>> > -       if (ret)
>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>> > +       if (err) {
>> > +               ret = VM_FAULT_NOPAGE;
>> >                 goto out;
>> > +       }
>> >
>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>> >                 mutex_unlock(&msm_obj->lock);
>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         /* make sure we have pages attached now */
>> >         pages = get_pages(obj);
>> >         if (IS_ERR(pages)) {
>> > -               ret = PTR_ERR(pages);
>> > +               ret = vmf_error(PTR_ERR(pages));
>> >                 goto out_unlock;
>> >         }
>> >
>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>> >                         pfn, pfn << PAGE_SHIFT);
>> >
>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> > -
>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> >  out_unlock:
>> >         mutex_unlock(&msm_obj->lock);
>> >  out:
>> > -       switch (ret) {
>> > -       case -EAGAIN:
>> > -       case 0:
>> > -       case -ERESTARTSYS:
>> > -       case -EINTR:
>> > -       case -EBUSY:
>> > -               /*
>> > -                * EBUSY is ok: this just means that another thread
>> > -                * already did the job.
>> > -                */
>> > -               return VM_FAULT_NOPAGE;
>> > -       case -ENOMEM:
>> > -               return VM_FAULT_OOM;
>> > -       default:
>> > -               return VM_FAULT_SIGBUS;
>> > -       }
>> > +       return ret;
>> >  }
>> >
>> >  /** get mmap offset */
>> > --
>> > 1.9.1
>> >
>>
>> Any comment for this patch ?
>
> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
> usual regression tests. LGTM.
>

Jordan, This patch is not merged in 4.18-rc-1.
_______________________________________________
Freedreno mailing list
Freedreno@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/freedreno

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [Freedreno] [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-06-18  3:40           ` Souptick Joarder
  0 siblings, 0 replies; 11+ messages in thread
From: Souptick Joarder @ 2018-06-18  3:40 UTC (permalink / raw)
  To: Souptick Joarder, Rob Clark, airlied, Matthew Wilcox,
	linux-arm-msm, freedreno, linux-kernel, jcrouse

On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>> > mapped into VM_FAULT_* type. The new function
>> > vmf_insert_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>
>> > ---
>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> > index 0a653dd..44b4ca7 100644
>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>> > @@ -33,6 +33,7 @@
>> >  #include <linux/of_graph.h>
>> >  #include <linux/of_device.h>
>> >  #include <asm/sizes.h>
>> > +#include <linux/mm_types.h>
>> >
>> >  #include <drm/drmP.h>
>> >  #include <drm/drm_atomic.h>
>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>> >                         struct vm_area_struct *vma);
>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>> > -int msm_gem_fault(struct vm_fault *vmf);
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>> > index 07376de..27a5ab5 100644
>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>> >  }
>> >
>> > -int msm_gem_fault(struct vm_fault *vmf)
>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>> >  {
>> >         struct vm_area_struct *vma = vmf->vma;
>> >         struct drm_gem_object *obj = vma->vm_private_data;
>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         struct page **pages;
>> >         unsigned long pfn;
>> >         pgoff_t pgoff;
>> > -       int ret;
>> > +       int err;
>> > +       vm_fault_t ret;
>> >
>> >         /*
>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>> >          * a reference on obj. So, we dont need to hold one here.
>> >          */
>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>> > -       if (ret)
>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>> > +       if (err) {
>> > +               ret = VM_FAULT_NOPAGE;
>> >                 goto out;
>> > +       }
>> >
>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>> >                 mutex_unlock(&msm_obj->lock);
>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         /* make sure we have pages attached now */
>> >         pages = get_pages(obj);
>> >         if (IS_ERR(pages)) {
>> > -               ret = PTR_ERR(pages);
>> > +               ret = vmf_error(PTR_ERR(pages));
>> >                 goto out_unlock;
>> >         }
>> >
>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>> >                         pfn, pfn << PAGE_SHIFT);
>> >
>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> > -
>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>> >  out_unlock:
>> >         mutex_unlock(&msm_obj->lock);
>> >  out:
>> > -       switch (ret) {
>> > -       case -EAGAIN:
>> > -       case 0:
>> > -       case -ERESTARTSYS:
>> > -       case -EINTR:
>> > -       case -EBUSY:
>> > -               /*
>> > -                * EBUSY is ok: this just means that another thread
>> > -                * already did the job.
>> > -                */
>> > -               return VM_FAULT_NOPAGE;
>> > -       case -ENOMEM:
>> > -               return VM_FAULT_OOM;
>> > -       default:
>> > -               return VM_FAULT_SIGBUS;
>> > -       }
>> > +       return ret;
>> >  }
>> >
>> >  /** get mmap offset */
>> > --
>> > 1.9.1
>> >
>>
>> Any comment for this patch ?
>
> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
> usual regression tests. LGTM.
>

Jordan, This patch is not merged in 4.18-rc-1.

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t
  2018-06-18  3:40           ` [Freedreno] " Souptick Joarder
@ 2018-06-18 21:43               ` Rob Clark
  -1 siblings, 0 replies; 11+ messages in thread
From: Rob Clark @ 2018-06-18 21:43 UTC (permalink / raw)
  To: Souptick Joarder
  Cc: David Airlie, linux-arm-msm, Linux Kernel Mailing List,
	Matthew Wilcox, Jordan Crouse, freedreno

On Sun, Jun 17, 2018 at 11:40 PM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
>> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>>> > mapped into VM_FAULT_* type. The new function
>>> > vmf_insert_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>
>>> > ---
>>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>>> >
>>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>>> > index 0a653dd..44b4ca7 100644
>>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>>> > @@ -33,6 +33,7 @@
>>> >  #include <linux/of_graph.h>
>>> >  #include <linux/of_device.h>
>>> >  #include <asm/sizes.h>
>>> > +#include <linux/mm_types.h>
>>> >
>>> >  #include <drm/drmP.h>
>>> >  #include <drm/drm_atomic.h>
>>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>>> >                         struct vm_area_struct *vma);
>>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>>> > -int msm_gem_fault(struct vm_fault *vmf);
>>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>>> > index 07376de..27a5ab5 100644
>>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>>> >  }
>>> >
>>> > -int msm_gem_fault(struct vm_fault *vmf)
>>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>>> >  {
>>> >         struct vm_area_struct *vma = vmf->vma;
>>> >         struct drm_gem_object *obj = vma->vm_private_data;
>>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         struct page **pages;
>>> >         unsigned long pfn;
>>> >         pgoff_t pgoff;
>>> > -       int ret;
>>> > +       int err;
>>> > +       vm_fault_t ret;
>>> >
>>> >         /*
>>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>>> >          * a reference on obj. So, we dont need to hold one here.
>>> >          */
>>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>>> > -       if (ret)
>>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>>> > +       if (err) {
>>> > +               ret = VM_FAULT_NOPAGE;
>>> >                 goto out;
>>> > +       }
>>> >
>>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>>> >                 mutex_unlock(&msm_obj->lock);
>>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         /* make sure we have pages attached now */
>>> >         pages = get_pages(obj);
>>> >         if (IS_ERR(pages)) {
>>> > -               ret = PTR_ERR(pages);
>>> > +               ret = vmf_error(PTR_ERR(pages));
>>> >                 goto out_unlock;
>>> >         }
>>> >
>>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>>> >                         pfn, pfn << PAGE_SHIFT);
>>> >
>>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>>> > -
>>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>>> >  out_unlock:
>>> >         mutex_unlock(&msm_obj->lock);
>>> >  out:
>>> > -       switch (ret) {
>>> > -       case -EAGAIN:
>>> > -       case 0:
>>> > -       case -ERESTARTSYS:
>>> > -       case -EINTR:
>>> > -       case -EBUSY:
>>> > -               /*
>>> > -                * EBUSY is ok: this just means that another thread
>>> > -                * already did the job.
>>> > -                */
>>> > -               return VM_FAULT_NOPAGE;
>>> > -       case -ENOMEM:
>>> > -               return VM_FAULT_OOM;
>>> > -       default:
>>> > -               return VM_FAULT_SIGBUS;
>>> > -       }
>>> > +       return ret;
>>> >  }
>>> >
>>> >  /** get mmap offset */
>>> > --
>>> > 1.9.1
>>> >
>>>
>>> Any comment for this patch ?
>>
>> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
>> usual regression tests. LGTM.
>>
>
> Jordan, This patch is not merged in 4.18-rc-1.

this was on my list to pull into msm-next for 4.19 as soon as I have a
chance to do my next round of pulling patches from patchwork, so it
should show up in linux-next shortly..

BR,
-R
_______________________________________________
Freedreno mailing list
Freedreno@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/freedreno

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [Freedreno] [PATCH] gpu: drm: msm: Change return type to vm_fault_t
@ 2018-06-18 21:43               ` Rob Clark
  0 siblings, 0 replies; 11+ messages in thread
From: Rob Clark @ 2018-06-18 21:43 UTC (permalink / raw)
  To: Souptick Joarder
  Cc: David Airlie, Matthew Wilcox, linux-arm-msm, freedreno,
	Linux Kernel Mailing List, Jordan Crouse

On Sun, Jun 17, 2018 at 11:40 PM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> On Thu, May 31, 2018 at 11:29 PM, Jordan Crouse <jcrouse@codeaurora.org> wrote:
>> On Mon, May 28, 2018 at 12:38:41PM +0530, Souptick Joarder wrote:
>>> On Mon, May 21, 2018 at 10:59 PM, 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_mixed() returns err which driver
>>> > mapped into VM_FAULT_* type. The new function
>>> > vmf_insert_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>
>>> > ---
>>> >  drivers/gpu/drm/msm/msm_drv.h |  3 ++-
>>> >  drivers/gpu/drm/msm/msm_gem.c | 33 ++++++++++-----------------------
>>> >  2 files changed, 12 insertions(+), 24 deletions(-)
>>> >
>>> > diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>>> > index 0a653dd..44b4ca7 100644
>>> > --- a/drivers/gpu/drm/msm/msm_drv.h
>>> > +++ b/drivers/gpu/drm/msm/msm_drv.h
>>> > @@ -33,6 +33,7 @@
>>> >  #include <linux/of_graph.h>
>>> >  #include <linux/of_device.h>
>>> >  #include <asm/sizes.h>
>>> > +#include <linux/mm_types.h>
>>> >
>>> >  #include <drm/drmP.h>
>>> >  #include <drm/drm_atomic.h>
>>> > @@ -188,7 +189,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
>>> >  int msm_gem_mmap_obj(struct drm_gem_object *obj,
>>> >                         struct vm_area_struct *vma);
>>> >  int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>>> > -int msm_gem_fault(struct vm_fault *vmf);
>>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf);
>>> >  uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj);
>>> >  int msm_gem_get_iova(struct drm_gem_object *obj,
>>> >                 struct msm_gem_address_space *aspace, uint64_t *iova);
>>> > diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
>>> > index 07376de..27a5ab5 100644
>>> > --- a/drivers/gpu/drm/msm/msm_gem.c
>>> > +++ b/drivers/gpu/drm/msm/msm_gem.c
>>> > @@ -217,7 +217,7 @@ int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>>> >         return msm_gem_mmap_obj(vma->vm_private_data, vma);
>>> >  }
>>> >
>>> > -int msm_gem_fault(struct vm_fault *vmf)
>>> > +vm_fault_t msm_gem_fault(struct vm_fault *vmf)
>>> >  {
>>> >         struct vm_area_struct *vma = vmf->vma;
>>> >         struct drm_gem_object *obj = vma->vm_private_data;
>>> > @@ -225,15 +225,18 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         struct page **pages;
>>> >         unsigned long pfn;
>>> >         pgoff_t pgoff;
>>> > -       int ret;
>>> > +       int err;
>>> > +       vm_fault_t ret;
>>> >
>>> >         /*
>>> >          * vm_ops.open/drm_gem_mmap_obj and close get and put
>>> >          * a reference on obj. So, we dont need to hold one here.
>>> >          */
>>> > -       ret = mutex_lock_interruptible(&msm_obj->lock);
>>> > -       if (ret)
>>> > +       err = mutex_lock_interruptible(&msm_obj->lock);
>>> > +       if (err) {
>>> > +               ret = VM_FAULT_NOPAGE;
>>> >                 goto out;
>>> > +       }
>>> >
>>> >         if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
>>> >                 mutex_unlock(&msm_obj->lock);
>>> > @@ -243,7 +246,7 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         /* make sure we have pages attached now */
>>> >         pages = get_pages(obj);
>>> >         if (IS_ERR(pages)) {
>>> > -               ret = PTR_ERR(pages);
>>> > +               ret = vmf_error(PTR_ERR(pages));
>>> >                 goto out_unlock;
>>> >         }
>>> >
>>> > @@ -255,27 +258,11 @@ int msm_gem_fault(struct vm_fault *vmf)
>>> >         VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
>>> >                         pfn, pfn << PAGE_SHIFT);
>>> >
>>> > -       ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>>> > -
>>> > +       ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
>>> >  out_unlock:
>>> >         mutex_unlock(&msm_obj->lock);
>>> >  out:
>>> > -       switch (ret) {
>>> > -       case -EAGAIN:
>>> > -       case 0:
>>> > -       case -ERESTARTSYS:
>>> > -       case -EINTR:
>>> > -       case -EBUSY:
>>> > -               /*
>>> > -                * EBUSY is ok: this just means that another thread
>>> > -                * already did the job.
>>> > -                */
>>> > -               return VM_FAULT_NOPAGE;
>>> > -       case -ENOMEM:
>>> > -               return VM_FAULT_OOM;
>>> > -       default:
>>> > -               return VM_FAULT_SIGBUS;
>>> > -       }
>>> > +       return ret;
>>> >  }
>>> >
>>> >  /** get mmap offset */
>>> > --
>>> > 1.9.1
>>> >
>>>
>>> Any comment for this patch ?
>>
>> Sorry for the delay, I wanted to get a chance to test it. It seems to pass the
>> usual regression tests. LGTM.
>>
>
> Jordan, This patch is not merged in 4.18-rc-1.

this was on my list to pull into msm-next for 4.19 as soon as I have a
chance to do my next round of pulling patches from patchwork, so it
should show up in linux-next shortly..

BR,
-R

^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2018-06-18 21:43 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-21 17:29 [PATCH] gpu: drm: msm: Change return type to vm_fault_t Souptick Joarder
2018-05-28  7:08 ` Souptick Joarder
2018-05-28  7:08   ` Souptick Joarder
     [not found]   ` <CAFqt6zY8VJ791_6C_pqrGgjG91T1kirEmUyA3JC+3JsN8QjFAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-05-31 17:59     ` Jordan Crouse
2018-05-31 17:59       ` [Freedreno] " Jordan Crouse
     [not found]       ` <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-05-31 18:53         ` Souptick Joarder
2018-05-31 18:53           ` [Freedreno] " Souptick Joarder
2018-06-18  3:40         ` Souptick Joarder
2018-06-18  3:40           ` [Freedreno] " Souptick Joarder
     [not found]           ` <CAFqt6zaVbJWCvCf8AF5nKPCpqrSi1Aweog2=V9xzJFzWGbmd3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-06-18 21:43             ` Rob Clark
2018-06-18 21:43               ` [Freedreno] " Rob Clark

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