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From: Alexandre Courbot <acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
To: Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	Alexandre Courbot
	<acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH 1/2] drm/nouveau/bar: add noncached ioremap property
Date: Fri, 27 Jun 2014 19:28:50 +0900	[thread overview]
Message-ID: <1403864931-4663-1-git-send-email-acourbot@nvidia.com> (raw)

Some BARs (like GK20A's) do not support being ioremapped write-combined.
Add a boolean property to the BAR structure and handle that case in the
Nouveau BO implementation.

Signed-off-by: Alexandre Courbot <acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 drivers/gpu/drm/nouveau/core/include/subdev/bar.h |  3 +++
 drivers/gpu/drm/nouveau/nouveau_bo.c              | 17 ++++++++++++-----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bar.h b/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
index 9faa98e67ad8..9002cbb6432b 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
@@ -20,6 +20,9 @@ struct nouveau_bar {
 		    u32 flags, struct nouveau_vma *);
 	void (*unmap)(struct nouveau_bar *, struct nouveau_vma *);
 	void (*flush)(struct nouveau_bar *);
+
+	/* whether the BAR supports to be ioremapped WC or should be uncached */
+	bool iomap_uncached;
 };
 
 static inline struct nouveau_bar *
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index b6dc85c614be..4db886f9f793 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -500,18 +500,25 @@ nouveau_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	case TTM_PL_VRAM:
+		man->flags = TTM_MEMTYPE_FLAG_FIXED |
+			     TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_FLAG_UNCACHED |
+					 TTM_PL_FLAG_WC;
+		man->default_caching = TTM_PL_FLAG_WC;
+
 		if (nv_device(drm->device)->card_type >= NV_50) {
+			/* Some BARs do not support being ioremapped WC */
+			if (nouveau_bar(drm->device)->iomap_uncached) {
+				man->available_caching = TTM_PL_FLAG_UNCACHED;
+				man->default_caching = TTM_PL_FLAG_UNCACHED;
+			}
+
 			man->func = &nouveau_vram_manager;
 			man->io_reserve_fastpath = false;
 			man->use_io_reserve_lru = true;
 		} else {
 			man->func = &ttm_bo_manager_func;
 		}
-		man->flags = TTM_MEMTYPE_FLAG_FIXED |
-			     TTM_MEMTYPE_FLAG_MAPPABLE;
-		man->available_caching = TTM_PL_FLAG_UNCACHED |
-					 TTM_PL_FLAG_WC;
-		man->default_caching = TTM_PL_FLAG_WC;
 		break;
 	case TTM_PL_TT:
 		if (nv_device(drm->device)->card_type >= NV_50)
-- 
2.0.0

WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Courbot <acourbot@nvidia.com>
To: Ben Skeggs <bskeggs@redhat.com>
Cc: <nouveau@lists.freedesktop.org>,
	<dri-devel@lists.freedesktop.org>, <linux-tegra@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <gnurou@gmail.com>,
	Alexandre Courbot <acourbot@nvidia.com>
Subject: [PATCH 1/2] drm/nouveau/bar: add noncached ioremap property
Date: Fri, 27 Jun 2014 19:28:50 +0900	[thread overview]
Message-ID: <1403864931-4663-1-git-send-email-acourbot@nvidia.com> (raw)

Some BARs (like GK20A's) do not support being ioremapped write-combined.
Add a boolean property to the BAR structure and handle that case in the
Nouveau BO implementation.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 drivers/gpu/drm/nouveau/core/include/subdev/bar.h |  3 +++
 drivers/gpu/drm/nouveau/nouveau_bo.c              | 17 ++++++++++++-----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bar.h b/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
index 9faa98e67ad8..9002cbb6432b 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bar.h
@@ -20,6 +20,9 @@ struct nouveau_bar {
 		    u32 flags, struct nouveau_vma *);
 	void (*unmap)(struct nouveau_bar *, struct nouveau_vma *);
 	void (*flush)(struct nouveau_bar *);
+
+	/* whether the BAR supports to be ioremapped WC or should be uncached */
+	bool iomap_uncached;
 };
 
 static inline struct nouveau_bar *
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index b6dc85c614be..4db886f9f793 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -500,18 +500,25 @@ nouveau_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	case TTM_PL_VRAM:
+		man->flags = TTM_MEMTYPE_FLAG_FIXED |
+			     TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_FLAG_UNCACHED |
+					 TTM_PL_FLAG_WC;
+		man->default_caching = TTM_PL_FLAG_WC;
+
 		if (nv_device(drm->device)->card_type >= NV_50) {
+			/* Some BARs do not support being ioremapped WC */
+			if (nouveau_bar(drm->device)->iomap_uncached) {
+				man->available_caching = TTM_PL_FLAG_UNCACHED;
+				man->default_caching = TTM_PL_FLAG_UNCACHED;
+			}
+
 			man->func = &nouveau_vram_manager;
 			man->io_reserve_fastpath = false;
 			man->use_io_reserve_lru = true;
 		} else {
 			man->func = &ttm_bo_manager_func;
 		}
-		man->flags = TTM_MEMTYPE_FLAG_FIXED |
-			     TTM_MEMTYPE_FLAG_MAPPABLE;
-		man->available_caching = TTM_PL_FLAG_UNCACHED |
-					 TTM_PL_FLAG_WC;
-		man->default_caching = TTM_PL_FLAG_WC;
 		break;
 	case TTM_PL_TT:
 		if (nv_device(drm->device)->card_type >= NV_50)
-- 
2.0.0


             reply	other threads:[~2014-06-27 10:28 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-27 10:28 Alexandre Courbot [this message]
2014-06-27 10:28 ` [PATCH 1/2] drm/nouveau/bar: add noncached ioremap property Alexandre Courbot
     [not found] ` <1403864931-4663-1-git-send-email-acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-06-27 10:28   ` [PATCH 2/2] drm/gk20a: add BAR instance Alexandre Courbot
2014-06-27 10:28     ` Alexandre Courbot
     [not found]     ` <1403864931-4663-2-git-send-email-acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-06-27 11:36       ` [PATCH v2] " Alexandre Courbot
2014-06-27 11:36         ` Alexandre Courbot
     [not found]         ` <1403869014-16209-1-git-send-email-acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-06-27 18:51           ` Ken Adams
2014-06-27 18:51             ` Ken Adams
     [not found]             ` <CFD332E4.8F1A4%kadams-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-06-28  0:56               ` Ben Skeggs
2014-06-28  0:56                 ` Ben Skeggs
2014-06-28  1:41                 ` Ken Adams
     [not found]                   ` <CFD3932D.8F2A2%kadams-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2014-06-28 13:10                     ` Ben Skeggs
2014-06-28 13:10                       ` Ben Skeggs
2014-07-08  7:41   ` [PATCH 1/2] drm/nouveau/bar: add noncached ioremap property Alexandre Courbot
2014-07-08  7:41     ` Alexandre Courbot

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