The nvif_object_ioctl() method NVIF_VMM_V0_PFNMAP wasn't correctly
setting the hardware specific GPU page table entries for 2MB sized
pages. Fix this by adding functions to set and clear PD0 GPU page
table entries.
Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c | 5 +-
.../drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 82 +++++++++++++++++++
2 files changed, 84 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
index 199f94e15c5f..19a6804e3989 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c
@@ -1204,7 +1204,6 @@ nvkm_vmm_pfn_unmap(struct nvkm_vmm *vmm, u64 addr, u64 size)
/*TODO:
* - Avoid PT readback (for dma_unmap etc), this might end up being dealt
* with inside HMM, which would be a lot nicer for us to deal with.
- * - Multiple page sizes (particularly for huge page support).
* - Support for systems without a 4KiB page size.
*/
int
@@ -1220,8 +1219,8 @@ nvkm_vmm_pfn_map(struct nvkm_vmm *vmm, u8 shift, u64 addr, u64 size, u64 *pfn)
/* Only support mapping where the page size of the incoming page
* array matches a page size available for direct mapping.
*/
- while (page->shift && page->shift != shift &&
- page->desc->func->pfn == NULL)
+ while (page->shift && (page->shift != shift ||
+ page->desc->func->pfn == NULL))
page++;
if (!page->shift || !IS_ALIGNED(addr, 1ULL << shift) ||
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
index d86287565542..ed37fddd063f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
@@ -258,12 +258,94 @@ gp100_vmm_pd0_unmap(struct nvkm_vmm *vmm,
VMM_FO128(pt, vmm, pdei * 0x10, 0ULL, 0ULL, pdes);
}
+static void
+gp100_vmm_pd0_pfn_unmap(struct nvkm_vmm *vmm,
+ struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
+{
+ struct device *dev = vmm->mmu->subdev.device->dev;
+ dma_addr_t addr;
+
+ nvkm_kmap(pt->memory);
+ while (ptes--) {
+ u32 datalo = nvkm_ro32(pt->memory, pt->base + ptei * 16 + 0);
+ u32 datahi = nvkm_ro32(pt->memory, pt->base + ptei * 16 + 4);
+ u64 data = (u64)datahi << 32 | datalo;
+
+ if ((data & (3ULL << 1)) != 0) {
+ addr = (data >> 8) << 12;
+ dma_unmap_page(dev, addr, 1UL << 21, DMA_BIDIRECTIONAL);
+ }
+ ptei++;
+ }
+ nvkm_done(pt->memory);
+}
+
+static bool
+gp100_vmm_pd0_pfn_clear(struct nvkm_vmm *vmm,
+ struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
+{
+ bool dma = false;
+
+ nvkm_kmap(pt->memory);
+ while (ptes--) {
+ u32 datalo = nvkm_ro32(pt->memory, pt->base + ptei * 16 + 0);
+ u32 datahi = nvkm_ro32(pt->memory, pt->base + ptei * 16 + 4);
+ u64 data = (u64)datahi << 32 | datalo;
+
+ if ((data & BIT_ULL(0)) && (data & (3ULL << 1)) != 0) {
+ VMM_WO064(pt, vmm, ptei * 16, data & ~BIT_ULL(0));
+ dma = true;
+ }
+ ptei++;
+ }
+ nvkm_done(pt->memory);
+ return dma;
+}
+
+static void
+gp100_vmm_pd0_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
+ u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
+{
+ struct device *dev = vmm->mmu->subdev.device->dev;
+ dma_addr_t addr;
+
+ nvkm_kmap(pt->memory);
+ while (ptes--) {
+ u64 data = 0;
+
+ if (!(*map->pfn & NVKM_VMM_PFN_W))
+ data |= BIT_ULL(6); /* RO. */
+
+ if (!(*map->pfn & NVKM_VMM_PFN_VRAM)) {
+ addr = *map->pfn >> NVKM_VMM_PFN_ADDR_SHIFT;
+ addr = dma_map_page(dev, pfn_to_page(addr), 0,
+ 1UL << 21, DMA_BIDIRECTIONAL);
+ if (!WARN_ON(dma_mapping_error(dev, addr))) {
+ data |= addr >> 4;
+ data |= 2ULL << 1; /* SYSTEM_COHERENT_MEMORY. */
+ data |= BIT_ULL(3); /* VOL. */
+ data |= BIT_ULL(0); /* VALID. */
+ }
+ } else {
+ data |= (*map->pfn & NVKM_VMM_PFN_ADDR) >> 4;
+ data |= BIT_ULL(0); /* VALID. */
+ }
+
+ VMM_WO064(pt, vmm, ptei++ * 16, data);
+ map->pfn++;
+ }
+ nvkm_done(pt->memory);
+}
+
static const struct nvkm_vmm_desc_func
gp100_vmm_desc_pd0 = {
.unmap = gp100_vmm_pd0_unmap,
.sparse = gp100_vmm_pd0_sparse,
.pde = gp100_vmm_pd0_pde,
.mem = gp100_vmm_pd0_mem,
+ .pfn = gp100_vmm_pd0_pfn,
+ .pfn_clear = gp100_vmm_pd0_pfn_clear,
+ .pfn_unmap = gp100_vmm_pd0_pfn_unmap,
};
static void
--
2.20.1
