Linux-ARM-MSM Archive on lore.kernel.org
 help / color / Atom feed
* [PATCH] drm/msm: stop abusing dma_map/unmap for cache
@ 2019-06-30 12:47 Rob Clark
  2019-07-18 15:49 ` [Freedreno] " Jordan Crouse
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Rob Clark @ 2019-06-30 12:47 UTC (permalink / raw)
  To: dri-devel
  Cc: Rob Clark, Stephen Boyd, Rob Clark, Sean Paul, David Airlie,
	Daniel Vetter, linux-arm-msm, freedreno, linux-kernel

From: Rob Clark <robdclark@chromium.org>

Recently splats like this started showing up:

   WARNING: CPU: 4 PID: 251 at drivers/iommu/dma-iommu.c:451 __iommu_dma_unmap+0xb8/0xc0
   Modules linked in: ath10k_snoc ath10k_core fuse msm ath mac80211 uvcvideo cfg80211 videobuf2_vmalloc videobuf2_memops vide
   CPU: 4 PID: 251 Comm: kworker/u16:4 Tainted: G        W         5.2.0-rc5-next-20190619+ #2317
   Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN23WW(V1.06) 10/25/2018
   Workqueue: msm msm_gem_free_work [msm]
   pstate: 80c00005 (Nzcv daif +PAN +UAO)
   pc : __iommu_dma_unmap+0xb8/0xc0
   lr : __iommu_dma_unmap+0x54/0xc0
   sp : ffff0000119abce0
   x29: ffff0000119abce0 x28: 0000000000000000
   x27: ffff8001f9946648 x26: ffff8001ec271068
   x25: 0000000000000000 x24: ffff8001ea3580a8
   x23: ffff8001f95ba010 x22: ffff80018e83ba88
   x21: ffff8001e548f000 x20: fffffffffffff000
   x19: 0000000000001000 x18: 00000000c00001fe
   x17: 0000000000000000 x16: 0000000000000000
   x15: ffff000015b70068 x14: 0000000000000005
   x13: 0003142cc1be1768 x12: 0000000000000001
   x11: ffff8001f6de9100 x10: 0000000000000009
   x9 : ffff000015b78000 x8 : 0000000000000000
   x7 : 0000000000000001 x6 : fffffffffffff000
   x5 : 0000000000000fff x4 : ffff00001065dbc8
   x3 : 000000000000000d x2 : 0000000000001000
   x1 : fffffffffffff000 x0 : 0000000000000000
   Call trace:
    __iommu_dma_unmap+0xb8/0xc0
    iommu_dma_unmap_sg+0x98/0xb8
    put_pages+0x5c/0xf0 [msm]
    msm_gem_free_work+0x10c/0x150 [msm]
    process_one_work+0x1e0/0x330
    worker_thread+0x40/0x438
    kthread+0x12c/0x130
    ret_from_fork+0x10/0x18
   ---[ end trace afc0dc5ab81a06bf ]---

Not quite sure what triggered that, but we really shouldn't be abusing
dma_{map,unmap}_sg() for cache maint.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Cc: Stephen Boyd <sboyd@kernel.org>
---
 drivers/gpu/drm/msm/msm_gem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index d31d9f927887..3b84cbdcafa3 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -108,7 +108,7 @@ static struct page **get_pages(struct drm_gem_object *obj)
 		 * because display controller, GPU, etc. are not coherent:
 		 */
 		if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
-			dma_map_sg(dev->dev, msm_obj->sgt->sgl,
+			dma_sync_sg_for_device(dev->dev, msm_obj->sgt->sgl,
 					msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
 	}
 
@@ -138,7 +138,7 @@ static void put_pages(struct drm_gem_object *obj)
 			 * GPU, etc. are not coherent:
 			 */
 			if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
-				dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
+				dma_sync_sg_for_cpu(obj->dev->dev, msm_obj->sgt->sgl,
 					     msm_obj->sgt->nents,
 					     DMA_BIDIRECTIONAL);
 
-- 
2.20.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [Freedreno] [PATCH] drm/msm: stop abusing dma_map/unmap for cache
  2019-06-30 12:47 [PATCH] drm/msm: stop abusing dma_map/unmap for cache Rob Clark
@ 2019-07-18 15:49 ` " Jordan Crouse
  2019-07-18 19:51 ` Stephen Boyd
  2019-07-22 19:40 ` Sean Paul
  2 siblings, 0 replies; 4+ messages in thread
From: Jordan Crouse @ 2019-07-18 15:49 UTC (permalink / raw)
  To: Rob Clark
  Cc: dri-devel, Rob Clark, freedreno, Stephen Boyd, linux-arm-msm,
	linux-kernel, David Airlie, Daniel Vetter, Sean Paul

On Sun, Jun 30, 2019 at 05:47:22AM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
> 
> Recently splats like this started showing up:
> 
>    WARNING: CPU: 4 PID: 251 at drivers/iommu/dma-iommu.c:451 __iommu_dma_unmap+0xb8/0xc0
>    Modules linked in: ath10k_snoc ath10k_core fuse msm ath mac80211 uvcvideo cfg80211 videobuf2_vmalloc videobuf2_memops vide
>    CPU: 4 PID: 251 Comm: kworker/u16:4 Tainted: G        W         5.2.0-rc5-next-20190619+ #2317
>    Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN23WW(V1.06) 10/25/2018
>    Workqueue: msm msm_gem_free_work [msm]
>    pstate: 80c00005 (Nzcv daif +PAN +UAO)
>    pc : __iommu_dma_unmap+0xb8/0xc0
>    lr : __iommu_dma_unmap+0x54/0xc0
>    sp : ffff0000119abce0
>    x29: ffff0000119abce0 x28: 0000000000000000
>    x27: ffff8001f9946648 x26: ffff8001ec271068
>    x25: 0000000000000000 x24: ffff8001ea3580a8
>    x23: ffff8001f95ba010 x22: ffff80018e83ba88
>    x21: ffff8001e548f000 x20: fffffffffffff000
>    x19: 0000000000001000 x18: 00000000c00001fe
>    x17: 0000000000000000 x16: 0000000000000000
>    x15: ffff000015b70068 x14: 0000000000000005
>    x13: 0003142cc1be1768 x12: 0000000000000001
>    x11: ffff8001f6de9100 x10: 0000000000000009
>    x9 : ffff000015b78000 x8 : 0000000000000000
>    x7 : 0000000000000001 x6 : fffffffffffff000
>    x5 : 0000000000000fff x4 : ffff00001065dbc8
>    x3 : 000000000000000d x2 : 0000000000001000
>    x1 : fffffffffffff000 x0 : 0000000000000000
>    Call trace:
>     __iommu_dma_unmap+0xb8/0xc0
>     iommu_dma_unmap_sg+0x98/0xb8
>     put_pages+0x5c/0xf0 [msm]
>     msm_gem_free_work+0x10c/0x150 [msm]
>     process_one_work+0x1e0/0x330
>     worker_thread+0x40/0x438
>     kthread+0x12c/0x130
>     ret_from_fork+0x10/0x18
>    ---[ end trace afc0dc5ab81a06bf ]---
> 
> Not quite sure what triggered that, but we really shouldn't be abusing
> dma_{map,unmap}_sg() for cache maint.

I'm sure we'll see this rear its head again someday. My kingdom for leaf driver
cache control that makes sense.

Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>

> Signed-off-by: Rob Clark <robdclark@chromium.org>
> Cc: Stephen Boyd <sboyd@kernel.org>
> ---
>  drivers/gpu/drm/msm/msm_gem.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> index d31d9f927887..3b84cbdcafa3 100644
> --- a/drivers/gpu/drm/msm/msm_gem.c
> +++ b/drivers/gpu/drm/msm/msm_gem.c
> @@ -108,7 +108,7 @@ static struct page **get_pages(struct drm_gem_object *obj)
>  		 * because display controller, GPU, etc. are not coherent:
>  		 */
>  		if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
> -			dma_map_sg(dev->dev, msm_obj->sgt->sgl,
> +			dma_sync_sg_for_device(dev->dev, msm_obj->sgt->sgl,
>  					msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
>  	}
>  
> @@ -138,7 +138,7 @@ static void put_pages(struct drm_gem_object *obj)
>  			 * GPU, etc. are not coherent:
>  			 */
>  			if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
> -				dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
> +				dma_sync_sg_for_cpu(obj->dev->dev, msm_obj->sgt->sgl,
>  					     msm_obj->sgt->nents,
>  					     DMA_BIDIRECTIONAL);
>  
> -- 
> 2.20.1
> 
> _______________________________________________
> Freedreno mailing list
> Freedreno@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/freedreno

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

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] drm/msm: stop abusing dma_map/unmap for cache
  2019-06-30 12:47 [PATCH] drm/msm: stop abusing dma_map/unmap for cache Rob Clark
  2019-07-18 15:49 ` [Freedreno] " Jordan Crouse
@ 2019-07-18 19:51 ` Stephen Boyd
  2019-07-22 19:40 ` Sean Paul
  2 siblings, 0 replies; 4+ messages in thread
From: Stephen Boyd @ 2019-07-18 19:51 UTC (permalink / raw)
  To: Rob Clark, dri-devel
  Cc: Rob Clark, Rob Clark, Sean Paul, David Airlie, Daniel Vetter,
	linux-arm-msm, freedreno, linux-kernel

Quoting Rob Clark (2019-06-30 05:47:22)
> From: Rob Clark <robdclark@chromium.org>
> 
> Recently splats like this started showing up:
> 
>    WARNING: CPU: 4 PID: 251 at drivers/iommu/dma-iommu.c:451 __iommu_dma_unmap+0xb8/0xc0
>    Modules linked in: ath10k_snoc ath10k_core fuse msm ath mac80211 uvcvideo cfg80211 videobuf2_vmalloc videobuf2_memops vide
>    CPU: 4 PID: 251 Comm: kworker/u16:4 Tainted: G        W         5.2.0-rc5-next-20190619+ #2317
>    Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN23WW(V1.06) 10/25/2018
>    Workqueue: msm msm_gem_free_work [msm]
>    pstate: 80c00005 (Nzcv daif +PAN +UAO)
>    pc : __iommu_dma_unmap+0xb8/0xc0
>    lr : __iommu_dma_unmap+0x54/0xc0
>    sp : ffff0000119abce0
>    x29: ffff0000119abce0 x28: 0000000000000000
>    x27: ffff8001f9946648 x26: ffff8001ec271068
>    x25: 0000000000000000 x24: ffff8001ea3580a8
>    x23: ffff8001f95ba010 x22: ffff80018e83ba88
>    x21: ffff8001e548f000 x20: fffffffffffff000
>    x19: 0000000000001000 x18: 00000000c00001fe
>    x17: 0000000000000000 x16: 0000000000000000
>    x15: ffff000015b70068 x14: 0000000000000005
>    x13: 0003142cc1be1768 x12: 0000000000000001
>    x11: ffff8001f6de9100 x10: 0000000000000009
>    x9 : ffff000015b78000 x8 : 0000000000000000
>    x7 : 0000000000000001 x6 : fffffffffffff000
>    x5 : 0000000000000fff x4 : ffff00001065dbc8
>    x3 : 000000000000000d x2 : 0000000000001000
>    x1 : fffffffffffff000 x0 : 0000000000000000
>    Call trace:
>     __iommu_dma_unmap+0xb8/0xc0
>     iommu_dma_unmap_sg+0x98/0xb8
>     put_pages+0x5c/0xf0 [msm]
>     msm_gem_free_work+0x10c/0x150 [msm]
>     process_one_work+0x1e0/0x330
>     worker_thread+0x40/0x438
>     kthread+0x12c/0x130
>     ret_from_fork+0x10/0x18
>    ---[ end trace afc0dc5ab81a06bf ]---

Tested-by: Stephen Boyd <swboyd@chromium.org>


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] drm/msm: stop abusing dma_map/unmap for cache
  2019-06-30 12:47 [PATCH] drm/msm: stop abusing dma_map/unmap for cache Rob Clark
  2019-07-18 15:49 ` [Freedreno] " Jordan Crouse
  2019-07-18 19:51 ` Stephen Boyd
@ 2019-07-22 19:40 ` Sean Paul
  2 siblings, 0 replies; 4+ messages in thread
From: Sean Paul @ 2019-07-22 19:40 UTC (permalink / raw)
  To: Rob Clark
  Cc: dri-devel, Rob Clark, Stephen Boyd, Sean Paul, David Airlie,
	Daniel Vetter, linux-arm-msm, freedreno, linux-kernel

On Sun, Jun 30, 2019 at 05:47:22AM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
> 
> Recently splats like this started showing up:
> 
>    WARNING: CPU: 4 PID: 251 at drivers/iommu/dma-iommu.c:451 __iommu_dma_unmap+0xb8/0xc0
>    Modules linked in: ath10k_snoc ath10k_core fuse msm ath mac80211 uvcvideo cfg80211 videobuf2_vmalloc videobuf2_memops vide
>    CPU: 4 PID: 251 Comm: kworker/u16:4 Tainted: G        W         5.2.0-rc5-next-20190619+ #2317
>    Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN23WW(V1.06) 10/25/2018
>    Workqueue: msm msm_gem_free_work [msm]
>    pstate: 80c00005 (Nzcv daif +PAN +UAO)
>    pc : __iommu_dma_unmap+0xb8/0xc0
>    lr : __iommu_dma_unmap+0x54/0xc0
>    sp : ffff0000119abce0
>    x29: ffff0000119abce0 x28: 0000000000000000
>    x27: ffff8001f9946648 x26: ffff8001ec271068
>    x25: 0000000000000000 x24: ffff8001ea3580a8
>    x23: ffff8001f95ba010 x22: ffff80018e83ba88
>    x21: ffff8001e548f000 x20: fffffffffffff000
>    x19: 0000000000001000 x18: 00000000c00001fe
>    x17: 0000000000000000 x16: 0000000000000000
>    x15: ffff000015b70068 x14: 0000000000000005
>    x13: 0003142cc1be1768 x12: 0000000000000001
>    x11: ffff8001f6de9100 x10: 0000000000000009
>    x9 : ffff000015b78000 x8 : 0000000000000000
>    x7 : 0000000000000001 x6 : fffffffffffff000
>    x5 : 0000000000000fff x4 : ffff00001065dbc8
>    x3 : 000000000000000d x2 : 0000000000001000
>    x1 : fffffffffffff000 x0 : 0000000000000000
>    Call trace:
>     __iommu_dma_unmap+0xb8/0xc0
>     iommu_dma_unmap_sg+0x98/0xb8
>     put_pages+0x5c/0xf0 [msm]
>     msm_gem_free_work+0x10c/0x150 [msm]
>     process_one_work+0x1e0/0x330
>     worker_thread+0x40/0x438
>     kthread+0x12c/0x130
>     ret_from_fork+0x10/0x18
>    ---[ end trace afc0dc5ab81a06bf ]---
> 
> Not quite sure what triggered that, but we really shouldn't be abusing
> dma_{map,unmap}_sg() for cache maint.
> 
> Signed-off-by: Rob Clark <robdclark@chromium.org>
> Cc: Stephen Boyd <sboyd@kernel.org>

Applied to -misc-fixes

Thanks,

Sean

> ---
>  drivers/gpu/drm/msm/msm_gem.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
> index d31d9f927887..3b84cbdcafa3 100644
> --- a/drivers/gpu/drm/msm/msm_gem.c
> +++ b/drivers/gpu/drm/msm/msm_gem.c
> @@ -108,7 +108,7 @@ static struct page **get_pages(struct drm_gem_object *obj)
>  		 * because display controller, GPU, etc. are not coherent:
>  		 */
>  		if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
> -			dma_map_sg(dev->dev, msm_obj->sgt->sgl,
> +			dma_sync_sg_for_device(dev->dev, msm_obj->sgt->sgl,
>  					msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
>  	}
>  
> @@ -138,7 +138,7 @@ static void put_pages(struct drm_gem_object *obj)
>  			 * GPU, etc. are not coherent:
>  			 */
>  			if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
> -				dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
> +				dma_sync_sg_for_cpu(obj->dev->dev, msm_obj->sgt->sgl,
>  					     msm_obj->sgt->nents,
>  					     DMA_BIDIRECTIONAL);
>  
> -- 
> 2.20.1
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, back to index

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-06-30 12:47 [PATCH] drm/msm: stop abusing dma_map/unmap for cache Rob Clark
2019-07-18 15:49 ` [Freedreno] " Jordan Crouse
2019-07-18 19:51 ` Stephen Boyd
2019-07-22 19:40 ` Sean Paul

Linux-ARM-MSM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-arm-msm/0 linux-arm-msm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-arm-msm linux-arm-msm/ https://lore.kernel.org/linux-arm-msm \
		linux-arm-msm@vger.kernel.org linux-arm-msm@archiver.kernel.org
	public-inbox-index linux-arm-msm


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-arm-msm


AGPL code for this site: git clone https://public-inbox.org/ public-inbox