diff options
-rw-r--r-- | drivers/gpu/drm/nouveau/include/nvif/if000c.h | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_svm.c | 126 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 6 |
4 files changed, 123 insertions, 11 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvif/if000c.h b/drivers/gpu/drm/nouveau/include/nvif/if000c.h index d6dd40f21eed..9c7ff56831c5 100644 --- a/drivers/gpu/drm/nouveau/include/nvif/if000c.h +++ b/drivers/gpu/drm/nouveau/include/nvif/if000c.h @@ -77,6 +77,7 @@ struct nvif_vmm_pfnmap_v0 { #define NVIF_VMM_PFNMAP_V0_APER 0x00000000000000f0ULL #define NVIF_VMM_PFNMAP_V0_HOST 0x0000000000000000ULL #define NVIF_VMM_PFNMAP_V0_VRAM 0x0000000000000010ULL +#define NVIF_VMM_PFNMAP_V0_A 0x0000000000000004ULL #define NVIF_VMM_PFNMAP_V0_W 0x0000000000000002ULL #define NVIF_VMM_PFNMAP_V0_V 0x0000000000000001ULL #define NVIF_VMM_PFNMAP_V0_NONE 0x0000000000000000ULL diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c index 0a0c92539b5c..82b583f5fca8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -35,6 +35,7 @@ #include <linux/sched/mm.h> #include <linux/sort.h> #include <linux/hmm.h> +#include <linux/rmap.h> struct nouveau_svm { struct nouveau_drm *drm; @@ -67,6 +68,11 @@ struct nouveau_svm { } buffer[1]; }; +#define FAULT_ACCESS_READ 0 +#define FAULT_ACCESS_WRITE 1 +#define FAULT_ACCESS_ATOMIC 2 +#define FAULT_ACCESS_PREFETCH 3 + #define SVM_DBG(s,f,a...) NV_DEBUG((s)->drm, "svm: "f"\n", ##a) #define SVM_ERR(s,f,a...) NV_WARN((s)->drm, "svm: "f"\n", ##a) @@ -412,6 +418,24 @@ nouveau_svm_fault_cancel_fault(struct nouveau_svm *svm, } static int +nouveau_svm_fault_priority(u8 fault) +{ + switch (fault) { + case FAULT_ACCESS_PREFETCH: + return 0; + case FAULT_ACCESS_READ: + return 1; + case FAULT_ACCESS_WRITE: + return 2; + case FAULT_ACCESS_ATOMIC: + return 3; + default: + WARN_ON_ONCE(1); + return -1; + } +} + +static int nouveau_svm_fault_cmp(const void *a, const void *b) { const struct nouveau_svm_fault *fa = *(struct nouveau_svm_fault **)a; @@ -421,9 +445,8 @@ nouveau_svm_fault_cmp(const void *a, const void *b) return ret; if ((ret = (s64)fa->addr - fb->addr)) return ret; - /*XXX: atomic? */ - return (fa->access == 0 || fa->access == 3) - - (fb->access == 0 || fb->access == 3); + return nouveau_svm_fault_priority(fa->access) - + nouveau_svm_fault_priority(fb->access); } static void @@ -487,6 +510,10 @@ static bool nouveau_svm_range_invalidate(struct mmu_interval_notifier *mni, struct svm_notifier *sn = container_of(mni, struct svm_notifier, notifier); + if (range->event == MMU_NOTIFY_EXCLUSIVE && + range->owner == sn->svmm->vmm->cli->drm->dev) + return true; + /* * serializes the update to mni->invalidate_seq done by caller and * prevents invalidation of the PTE from progressing while HW is being @@ -555,6 +582,71 @@ static void nouveau_hmm_convert_pfn(struct nouveau_drm *drm, args->p.phys[0] |= NVIF_VMM_PFNMAP_V0_W; } +static int nouveau_atomic_range_fault(struct nouveau_svmm *svmm, + struct nouveau_drm *drm, + struct nouveau_pfnmap_args *args, u32 size, + struct svm_notifier *notifier) +{ + unsigned long timeout = + jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT); + struct mm_struct *mm = svmm->notifier.mm; + struct page *page; + unsigned long start = args->p.addr; + unsigned long notifier_seq; + int ret = 0; + + ret = mmu_interval_notifier_insert(¬ifier->notifier, mm, + args->p.addr, args->p.size, + &nouveau_svm_mni_ops); + if (ret) + return ret; + + while (true) { + if (time_after(jiffies, timeout)) { + ret = -EBUSY; + goto out; + } + + notifier_seq = mmu_interval_read_begin(¬ifier->notifier); + mmap_read_lock(mm); + ret = make_device_exclusive_range(mm, start, start + PAGE_SIZE, + &page, drm->dev); + mmap_read_unlock(mm); + if (ret <= 0 || !page) { + ret = -EINVAL; + goto out; + } + + mutex_lock(&svmm->mutex); + if (!mmu_interval_read_retry(¬ifier->notifier, + notifier_seq)) + break; + mutex_unlock(&svmm->mutex); + } + + /* Map the page on the GPU. */ + args->p.page = 12; + args->p.size = PAGE_SIZE; + args->p.addr = start; + args->p.phys[0] = page_to_phys(page) | + NVIF_VMM_PFNMAP_V0_V | + NVIF_VMM_PFNMAP_V0_W | + NVIF_VMM_PFNMAP_V0_A | + NVIF_VMM_PFNMAP_V0_HOST; + + svmm->vmm->vmm.object.client->super = true; + ret = nvif_object_ioctl(&svmm->vmm->vmm.object, args, size, NULL); + svmm->vmm->vmm.object.client->super = false; + mutex_unlock(&svmm->mutex); + + unlock_page(page); + put_page(page); + +out: + mmu_interval_notifier_remove(¬ifier->notifier); + return ret; +} + static int nouveau_range_fault(struct nouveau_svmm *svmm, struct nouveau_drm *drm, struct nouveau_pfnmap_args *args, u32 size, @@ -637,7 +729,7 @@ nouveau_svm_fault(struct nvif_notify *notify) unsigned long hmm_flags; u64 inst, start, limit; int fi, fn; - int replay = 0, ret; + int replay = 0, atomic = 0, ret; /* Parse available fault buffer entries into a cache, and update * the GET pointer so HW can reuse the entries. @@ -718,12 +810,14 @@ nouveau_svm_fault(struct nvif_notify *notify) /* * Determine required permissions based on GPU fault * access flags. - * XXX: atomic? */ switch (buffer->fault[fi]->access) { case 0: /* READ. */ hmm_flags = HMM_PFN_REQ_FAULT; break; + case 2: /* ATOMIC. */ + atomic = true; + break; case 3: /* PREFETCH. */ hmm_flags = 0; break; @@ -739,8 +833,14 @@ nouveau_svm_fault(struct nvif_notify *notify) } notifier.svmm = svmm; - ret = nouveau_range_fault(svmm, svm->drm, &args.i, - sizeof(args), hmm_flags, ¬ifier); + if (atomic) + ret = nouveau_atomic_range_fault(svmm, svm->drm, + &args.i, sizeof(args), + ¬ifier); + else + ret = nouveau_range_fault(svmm, svm->drm, &args.i, + sizeof(args), hmm_flags, + ¬ifier); mmput(mm); limit = args.i.p.addr + args.i.p.size; @@ -756,11 +856,15 @@ nouveau_svm_fault(struct nvif_notify *notify) */ if (buffer->fault[fn]->svmm != svmm || buffer->fault[fn]->addr >= limit || - (buffer->fault[fi]->access == 0 /* READ. */ && + (buffer->fault[fi]->access == FAULT_ACCESS_READ && !(args.phys[0] & NVIF_VMM_PFNMAP_V0_V)) || - (buffer->fault[fi]->access != 0 /* READ. */ && - buffer->fault[fi]->access != 3 /* PREFETCH. */ && - !(args.phys[0] & NVIF_VMM_PFNMAP_V0_W))) + (buffer->fault[fi]->access != FAULT_ACCESS_READ && + buffer->fault[fi]->access != FAULT_ACCESS_PREFETCH && + !(args.phys[0] & NVIF_VMM_PFNMAP_V0_W)) || + (buffer->fault[fi]->access != FAULT_ACCESS_READ && + buffer->fault[fi]->access != FAULT_ACCESS_WRITE && + buffer->fault[fi]->access != FAULT_ACCESS_PREFETCH && + !(args.phys[0] & NVIF_VMM_PFNMAP_V0_A))) break; } diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h index a2b179568970..f6188aa9171c 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h @@ -178,6 +178,7 @@ void nvkm_vmm_unmap_region(struct nvkm_vmm *, struct nvkm_vma *); #define NVKM_VMM_PFN_APER 0x00000000000000f0ULL #define NVKM_VMM_PFN_HOST 0x0000000000000000ULL #define NVKM_VMM_PFN_VRAM 0x0000000000000010ULL +#define NVKM_VMM_PFN_A 0x0000000000000004ULL #define NVKM_VMM_PFN_W 0x0000000000000002ULL #define NVKM_VMM_PFN_V 0x0000000000000001ULL #define NVKM_VMM_PFN_NONE 0x0000000000000000ULL diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c index 236db5570771..f02abd9cb4dd 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c @@ -88,6 +88,9 @@ gp100_vmm_pgt_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, if (!(*map->pfn & NVKM_VMM_PFN_W)) data |= BIT_ULL(6); /* RO. */ + if (!(*map->pfn & NVKM_VMM_PFN_A)) + data |= BIT_ULL(7); /* Atomic disable. */ + 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, @@ -322,6 +325,9 @@ gp100_vmm_pd0_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, if (!(*map->pfn & NVKM_VMM_PFN_W)) data |= BIT_ULL(6); /* RO. */ + if (!(*map->pfn & NVKM_VMM_PFN_A)) + data |= BIT_ULL(7); /* Atomic disable. */ + 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, |