[RFC PATCH 08/13] drm/nouveau: special mapping method for HMM (user interface)
jglisse at redhat.com
jglisse at redhat.com
Sat Mar 10 03:21:36 UTC 2018
From: Jérôme Glisse <jglisse at redhat.com>
Signed-off-by: Jérôme Glisse <jglisse at redhat.com>
Cc: Ben Skeggs <bskeggs at redhat.com>
---
drivers/gpu/drm/nouveau/include/nvif/if000c.h | 17 ++++++++
drivers/gpu/drm/nouveau/include/nvif/vmm.h | 2 +
drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h | 25 ++++--------
drivers/gpu/drm/nouveau/nvif/vmm.c | 29 ++++++++++++++
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c | 49 ++++++++++++++++++++---
5 files changed, 99 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/include/nvif/if000c.h b/drivers/gpu/drm/nouveau/include/nvif/if000c.h
index 2928ecd989ad..2c24817ca533 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/if000c.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/if000c.h
@@ -14,6 +14,8 @@ struct nvif_vmm_v0 {
#define NVIF_VMM_V0_PUT 0x02
#define NVIF_VMM_V0_MAP 0x03
#define NVIF_VMM_V0_UNMAP 0x04
+#define NVIF_VMM_V0_HMM_MAP 0x05
+#define NVIF_VMM_V0_HMM_UNMAP 0x06
struct nvif_vmm_page_v0 {
__u8 version;
@@ -61,4 +63,19 @@ struct nvif_vmm_unmap_v0 {
__u8 pad01[7];
__u64 addr;
};
+
+struct nvif_vmm_hmm_map_v0 {
+ __u8 version;
+ __u8 pad01[7];
+ __u64 addr;
+ __u64 npages;
+ __u64 pages;
+};
+
+struct nvif_vmm_hmm_unmap_v0 {
+ __u8 version;
+ __u8 pad01[7];
+ __u64 addr;
+ __u64 npages;
+};
#endif
diff --git a/drivers/gpu/drm/nouveau/include/nvif/vmm.h b/drivers/gpu/drm/nouveau/include/nvif/vmm.h
index c5db8a2e82df..c5e4adaa0e3c 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/vmm.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/vmm.h
@@ -39,4 +39,6 @@ void nvif_vmm_put(struct nvif_vmm *, struct nvif_vma *);
int nvif_vmm_map(struct nvif_vmm *, u64 addr, u64 size, void *argv, u32 argc,
struct nvif_mem *, u64 offset);
int nvif_vmm_unmap(struct nvif_vmm *, u64);
+int nvif_vmm_hmm_map(struct nvif_vmm *vmm, u64 addr, u64 npages, u64 *pages);
+int nvif_vmm_hmm_unmap(struct nvif_vmm *vmm, u64 addr, u64 npages);
#endif
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
index 719d50e6296f..8f08718e05aa 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
@@ -4,20 +4,6 @@
#include <core/subdev.h>
#include <linux/hmm.h>
-/* Need to change HMM to be more driver friendly */
-#if IS_ENABLED(CONFIG_HMM)
-#else
-typedef unsigned long hmm_pfn_t;
-#define HMM_PFN_VALID (1 << 0)
-#define HMM_PFN_READ (1 << 1)
-#define HMM_PFN_WRITE (1 << 2)
-#define HMM_PFN_ERROR (1 << 3)
-#define HMM_PFN_EMPTY (1 << 4)
-#define HMM_PFN_SPECIAL (1 << 5)
-#define HMM_PFN_DEVICE_UNADDRESSABLE (1 << 6)
-#define HMM_PFN_SHIFT 7
-#endif
-
struct nvkm_vma {
struct list_head head;
struct rb_node tree;
@@ -79,10 +65,13 @@ struct nvkm_vmm_map {
struct nvkm_mm_node *mem;
struct scatterlist *sgl;
dma_addr_t *dma;
-#define NV_HMM_PAGE_FLAG_V HMM_PFN_VALID
-#define NV_HMM_PAGE_FLAG_W HMM_PFN_WRITE
-#define NV_HMM_PAGE_FLAG_E HMM_PFN_ERROR
-#define NV_HMM_PAGE_PFN_SHIFT HMM_PFN_SHIFT
+#define NV_HMM_PAGE_FLAG_V (1 << 0)
+#define NV_HMM_PAGE_FLAG_R 0
+#define NV_HMM_PAGE_FLAG_W (1 << 1)
+#define NV_HMM_PAGE_FLAG_E (-1ULL)
+#define NV_HMM_PAGE_FLAG_N 0
+#define NV_HMM_PAGE_FLAG_S (1ULL << 63)
+#define NV_HMM_PAGE_PFN_SHIFT 8
u64 *pages;
u64 off;
diff --git a/drivers/gpu/drm/nouveau/nvif/vmm.c b/drivers/gpu/drm/nouveau/nvif/vmm.c
index 31cdb2d2e1ff..27a7b95b4e9c 100644
--- a/drivers/gpu/drm/nouveau/nvif/vmm.c
+++ b/drivers/gpu/drm/nouveau/nvif/vmm.c
@@ -32,6 +32,35 @@ nvif_vmm_unmap(struct nvif_vmm *vmm, u64 addr)
sizeof(struct nvif_vmm_unmap_v0));
}
+int
+nvif_vmm_hmm_map(struct nvif_vmm *vmm, u64 addr, u64 npages, u64 *pages)
+{
+ struct nvif_vmm_hmm_map_v0 args;
+ int ret;
+
+ args.version = 0;
+ args.addr = addr;
+ args.npages = npages;
+ args.pages = (uint64_t)pages;
+ ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_HMM_MAP,
+ &args, sizeof(args));
+ return ret;
+}
+
+int
+nvif_vmm_hmm_unmap(struct nvif_vmm *vmm, u64 addr, u64 npages)
+{
+ struct nvif_vmm_hmm_unmap_v0 args;
+ int ret;
+
+ args.version = 0;
+ args.addr = addr;
+ args.npages = npages;
+ ret = nvif_object_mthd(&vmm->object, NVIF_VMM_V0_HMM_UNMAP,
+ &args, sizeof(args));
+ return ret;
+}
+
int
nvif_vmm_map(struct nvif_vmm *vmm, u64 addr, u64 size, void *argv, u32 argc,
struct nvif_mem *mem, u64 offset)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
index 37b201b95f15..739f2af02552 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
@@ -274,16 +274,55 @@ nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
return 0;
}
+static int
+nvkm_uvmm_mthd_hmm_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ union {
+ struct nvif_vmm_hmm_map_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ int ret = -ENOSYS;
+
+ if ((ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false)))
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ nvkm_vmm_hmm_map(vmm, args->v0.addr, args->v0.npages,
+ (u64 *)args->v0.pages);
+ mutex_unlock(&vmm->mutex);
+ return 0;
+}
+
+static int
+nvkm_uvmm_mthd_hmm_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ union {
+ struct nvif_vmm_hmm_unmap_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ int ret = -ENOSYS;
+
+ if ((ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false)))
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ nvkm_vmm_hmm_unmap(vmm, args->v0.addr, args->v0.npages);
+ mutex_unlock(&vmm->mutex);
+ return 0;
+}
+
static int
nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
{
struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
switch (mthd) {
- case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
- case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
- case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
- case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
- case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
+ case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
+ case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
+ case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
+ case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
+ case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
+ case NVIF_VMM_V0_HMM_MAP : return nvkm_uvmm_mthd_hmm_map (uvmm, argv, argc);
+ case NVIF_VMM_V0_HMM_UNMAP: return nvkm_uvmm_mthd_hmm_unmap(uvmm, argv, argc);
default:
break;
}
--
2.14.3
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