* [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; 6+ 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] 6+ 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 [not found] ` <CAFqt6zY8VJ791_6C_pqrGgjG91T1kirEmUyA3JC+3JsN8QjFAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 0 siblings, 1 reply; 6+ 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] 6+ messages in thread
[parent not found: <CAFqt6zY8VJ791_6C_pqrGgjG91T1kirEmUyA3JC+3JsN8QjFAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>]
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t [not found] ` <CAFqt6zY8VJ791_6C_pqrGgjG91T1kirEmUyA3JC+3JsN8QjFAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> @ 2018-05-31 17:59 ` Jordan Crouse [not found] ` <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org> 0 siblings, 1 reply; 6+ 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] 6+ messages in thread
[parent not found: <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>]
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t [not found] ` <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org> @ 2018-05-31 18:53 ` Souptick Joarder 2018-06-18 3:40 ` Souptick Joarder 1 sibling, 0 replies; 6+ 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] 6+ messages in thread
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t [not found] ` <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org> 2018-05-31 18:53 ` Souptick Joarder @ 2018-06-18 3:40 ` Souptick Joarder [not found] ` <CAFqt6zaVbJWCvCf8AF5nKPCpqrSi1Aweog2=V9xzJFzWGbmd3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 1 sibling, 1 reply; 6+ 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] 6+ messages in thread
[parent not found: <CAFqt6zaVbJWCvCf8AF5nKPCpqrSi1Aweog2=V9xzJFzWGbmd3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>]
* Re: [PATCH] gpu: drm: msm: Change return type to vm_fault_t [not found] ` <CAFqt6zaVbJWCvCf8AF5nKPCpqrSi1Aweog2=V9xzJFzWGbmd3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> @ 2018-06-18 21:43 ` Rob Clark 0 siblings, 0 replies; 6+ 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] 6+ messages in thread
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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
[not found] ` <CAFqt6zY8VJ791_6C_pqrGgjG91T1kirEmUyA3JC+3JsN8QjFAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-05-31 17:59 ` Jordan Crouse
[not found] ` <20180531175902.GC11565-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-05-31 18:53 ` Souptick Joarder
2018-06-18 3:40 ` Souptick Joarder
[not found] ` <CAFqt6zaVbJWCvCf8AF5nKPCpqrSi1Aweog2=V9xzJFzWGbmd3w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-06-18 21:43 ` Rob Clark
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