Am 05.10.20 um 17:39 schrieb Ruhl, Michael J:
-----Original Message-----
From: dri-devel <dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of
Christian König
Sent: Thursday, October 1, 2020 7:28 AM
To: dri-devel@xxxxxxxxxxxxxxxxxxxxx; ray.huang@xxxxxxx;
airlied@xxxxxxxxx; daniel@xxxxxxxx
Subject: [PATCH 6/8] drm/ttm: add caching state to ttm_bus_placement
And implement setting it up correctly in the drivers.
This allows getting rid of the placement flags for this.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 1 +
drivers/gpu/drm/drm_gem_vram_helper.c | 1 +
drivers/gpu/drm/nouveau/nouveau_bo.c | 11 +++++++++++
drivers/gpu/drm/qxl/qxl_ttm.c | 2 ++
drivers/gpu/drm/radeon/radeon_ttm.c | 2 ++
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 1 +
include/drm/ttm/ttm_resource.h | 8 +++++---
7 files changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 7f41a47e7353..5b56a66063fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -769,6 +769,7 @@ static int amdgpu_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_reso
mem->bus.offset += adev->gmc.aper_base;
mem->bus.is_iomem = true;
+ mem->bus.caching = ttm_write_combined;
break;
default:
return -EINVAL;
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c
b/drivers/gpu/drm/drm_gem_vram_helper.c
index 62235926e077..79151b1c157c 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -961,6 +961,7 @@ static int bo_driver_io_mem_reserve(struct
ttm_bo_device *bdev,
case TTM_PL_VRAM:
mem->bus.offset = (mem->start << PAGE_SHIFT) + vmm-
vram_base;
mem->bus.is_iomem = true;
+ mem->bus.caching = ttm_write_combined;
break;
default:
return -EINVAL;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c
b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 1d4b16c0e353..8ed30f471ec7 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -1124,6 +1124,8 @@ nouveau_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_resource *reg)
struct nouveau_drm *drm = nouveau_bdev(bdev);
struct nvkm_device *device = nvxx_device(&drm->client.device);
struct nouveau_mem *mem = nouveau_mem(reg);
+ struct nvif_mmu *mmu = &drm->client.mmu;
+ const u8 type = mmu->type[drm->ttm.type_vram].type;
int ret;
mutex_lock(&drm->ttm.io_reserve_mutex);
@@ -1139,6 +1141,7 @@ nouveau_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_resource *reg)
reg->bus.offset = (reg->start << PAGE_SHIFT) +
drm->agp.base;
reg->bus.is_iomem = !drm->agp.cma;
Don't really know if this is true or not, so I will take your word on it. 😊
+ reg->bus.caching = ttm_write_combined;
}
#endif
if (drm->client.mem->oclass < NVIF_CLASS_MEM_NV50 ||
@@ -1152,6 +1155,14 @@ nouveau_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_resource *reg)
reg->bus.offset = (reg->start << PAGE_SHIFT) +
device->func->resource_addr(device, 1);
reg->bus.is_iomem = true;
+
+ /* Some BARs do not support being ioremapped WC */
+ if (drm->client.device.info.family >=
NV_DEVICE_INFO_V0_TESLA &&
+ type & NVIF_MEM_UNCACHED)
+ reg->bus.caching = ttm_uncached;
+ else
+ reg->bus.caching = ttm_write_combined;
+
if (drm->client.mem->oclass >= NVIF_CLASS_MEM_NV50) {
union {
struct nv50_mem_map_v0 nv50;
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index dcf4ac1480c7..e79d4df99790 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -83,11 +83,13 @@ int qxl_ttm_io_mem_reserve(struct ttm_bo_device
*bdev,
case TTM_PL_VRAM:
mem->bus.is_iomem = true;
mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev-
vram_base;
+ mem->bus.caching = ttm_cached;
break;
case TTM_PL_PRIV:
mem->bus.is_iomem = true;
mem->bus.offset = (mem->start << PAGE_SHIFT) +
qdev->surfaceram_base;
+ mem->bus.caching = ttm_cached;
is_iomem = true and ttm_cached is correct?
At least I think so :)
qxl is a software gpu?
Yes, indeed.
If this is true, then this looks reasonable.
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
Thanks,
Christian.
M
break;
default:
return -EINVAL;
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c
b/drivers/gpu/drm/radeon/radeon_ttm.c
index 130a7cea35c3..9b53a1d80632 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -372,6 +372,7 @@ static int radeon_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_reso
mem->bus.offset = (mem->start << PAGE_SHIFT) +
rdev->mc.agp_base;
mem->bus.is_iomem = !rdev->ddev->agp-
cant_use_aperture;
+ mem->bus.caching = ttm_write_combined;
}
#endif
break;
@@ -382,6 +383,7 @@ static int radeon_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_reso
return -EINVAL;
mem->bus.offset += rdev->mc.aper_base;
mem->bus.is_iomem = true;
+ mem->bus.caching = ttm_write_combined;
#ifdef __alpha__
/*
* Alpha: use bus.addr to hold the ioremap() return,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
index 42f957d40c9f..2a7b5f964776 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -688,6 +688,7 @@ static int vmw_ttm_io_mem_reserve(struct
ttm_bo_device *bdev, struct ttm_resourc
mem->bus.offset = (mem->start << PAGE_SHIFT) +
dev_priv->vram_start;
mem->bus.is_iomem = true;
+ mem->bus.caching = ttm_cached;
break;
default:
return -EINVAL;
diff --git a/include/drm/ttm/ttm_resource.h
b/include/drm/ttm/ttm_resource.h
index 0e172d94a0c1..91b67cecc6b6 100644
--- a/include/drm/ttm/ttm_resource.h
+++ b/include/drm/ttm/ttm_resource.h
@@ -29,6 +29,7 @@
#include <linux/mutex.h>
#include <linux/dma-fence.h>
#include <drm/drm_print.h>
+#include <drm/ttm/ttm_caching.h>
#define TTM_MAX_BO_PRIORITY 4U
@@ -148,9 +149,10 @@ struct ttm_resource_manager {
* Structure indicating the bus placement of an object.
*/
struct ttm_bus_placement {
- void *addr;
- phys_addr_t offset;
- bool is_iomem;
+ void *addr;
+ phys_addr_t offset;
+ bool is_iomem;
+ enum ttm_caching caching;
};
/**
--
2.17.1
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