diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/nouveau/Kbuild | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dmem.c | 976 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dmem.h | 39 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drm.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drv.h | 2 |
5 files changed, 1023 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/Kbuild b/drivers/gpu/drm/nouveau/Kbuild index 026cdec27b23..a826a4df440d 100644 --- a/drivers/gpu/drm/nouveau/Kbuild +++ b/drivers/gpu/drm/nouveau/Kbuild @@ -31,6 +31,7 @@ nouveau-y += nouveau_vga.o nouveau-y += nouveau_bo.o nouveau-y += nouveau_gem.o nouveau-y += nouveau_svm.o +nouveau-y += nouveau_dmem.o nouveau-y += nouveau_mem.o nouveau-y += nouveau_prime.o nouveau-y += nouveau_sgdma.o diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c new file mode 100644 index 000000000000..db7ca343b236 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -0,0 +1,976 @@ +/* + * Copyright 2018 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ +#include "nouveau_dmem.h" +#include "nouveau_drv.h" +#include "nouveau_chan.h" +#include "nouveau_dma.h" +#include "nouveau_mem.h" +#include "nouveau_bo.h" + +#include <nvif/class.h> +#include <nvif/object.h> +#include <nvif/if500b.h> +#include <nvif/if900b.h> + +#include <linux/sched/mm.h> +#include <linux/hmm.h> + +/* + * FIXME: this is ugly right now we are using TTM to allocate vram and we pin + * it in vram while in use. We likely want to overhaul memory management for + * nouveau to be more page like (not necessarily with system page size but a + * bigger page size) at lowest level and have some shim layer on top that would + * provide the same functionality as TTM. + */ +#define DMEM_CHUNK_SIZE (2UL << 20) +#define DMEM_CHUNK_NPAGES (DMEM_CHUNK_SIZE >> PAGE_SHIFT) + +struct nouveau_migrate; + +typedef int (*nouveau_migrate_copy_t)(struct nouveau_drm *drm, u64 npages, + u64 dst_addr, u64 src_addr); + +struct nouveau_dmem_chunk { + struct list_head list; + struct nouveau_bo *bo; + struct nouveau_drm *drm; + unsigned long pfn_first; + unsigned long callocated; + unsigned long bitmap[BITS_TO_LONGS(DMEM_CHUNK_NPAGES)]; + struct nvif_vma vma; +}; + +struct nouveau_dmem_migrate { + nouveau_migrate_copy_t copy_func; + struct nouveau_channel *chan; + struct nvif_object copy; +}; + +struct nouveau_dmem { + struct hmm_devmem *devmem; + struct nouveau_dmem_migrate migrate; + struct list_head chunk_free; + struct list_head chunk_full; + struct list_head chunk_empty; + struct mutex mutex; +}; + +struct nouveau_migrate_hmem { + struct scatterlist *sg; + struct nouveau_mem mem; + unsigned long npages; + struct nvif_vma vma; +}; + +struct nouveau_dmem_fault { + struct nouveau_drm *drm; + struct nouveau_fence *fence; + struct nouveau_migrate_hmem hmem; +}; + +struct nouveau_migrate { + struct vm_area_struct *vma; + struct nouveau_drm *drm; + struct nouveau_fence *fence; + unsigned long npages; + struct nouveau_migrate_hmem hmem; +}; + +static void +nouveau_migrate_hmem_fini(struct nouveau_drm *drm, + struct nouveau_migrate_hmem *hmem) +{ + struct nvif_vmm *vmm = &drm->client.vmm.vmm; + + nouveau_mem_fini(&hmem->mem); + nvif_vmm_put(vmm, &hmem->vma); + + if (hmem->sg) { + dma_unmap_sg_attrs(drm->dev->dev, hmem->sg, + hmem->npages, DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC); + kfree(hmem->sg); + hmem->sg = NULL; + } +} + +static int +nouveau_migrate_hmem_init(struct nouveau_drm *drm, + struct nouveau_migrate_hmem *hmem, + unsigned long npages, + const unsigned long *pfns) +{ + struct nvif_vmm *vmm = &drm->client.vmm.vmm; + unsigned long i; + int ret; + + hmem->sg = kzalloc(npages * sizeof(*hmem->sg), GFP_KERNEL); + if (hmem->sg == NULL) + return -ENOMEM; + + for (i = 0, hmem->npages = 0; hmem->npages < npages; ++i) { + struct page *page; + + if (!pfns[i] || pfns[i] == MIGRATE_PFN_ERROR) + continue; + + page = migrate_pfn_to_page(pfns[i]); + if (page == NULL) { + ret = -EINVAL; + goto error; + } + + sg_set_page(&hmem->sg[hmem->npages], page, PAGE_SIZE, 0); + hmem->npages++; + } + sg_mark_end(&hmem->sg[hmem->npages - 1]); + + i = dma_map_sg_attrs(drm->dev->dev, hmem->sg, hmem->npages, + DMA_BIDIRECTIONAL, DMA_ATTR_SKIP_CPU_SYNC); + if (i != hmem->npages) { + ret = -ENOMEM; + goto error; + } + + ret = nouveau_mem_sgl(&hmem->mem, &drm->client, + hmem->npages, hmem->sg); + if (ret) + goto error; + + ret = nvif_vmm_get(vmm, LAZY, false, hmem->mem.mem.page, + 0, hmem->mem.mem.size, &hmem->vma); + if (ret) + goto error; + + ret = nouveau_mem_map(&hmem->mem, vmm, &hmem->vma); + if (ret) + goto error; + + return 0; + +error: + nouveau_migrate_hmem_fini(drm, hmem); + return ret; +} + + +static void +nouveau_dmem_free(struct hmm_devmem *devmem, struct page *page) +{ + struct nouveau_dmem_chunk *chunk; + struct nouveau_drm *drm; + unsigned long idx; + + chunk = (void *)hmm_devmem_page_get_drvdata(page); + idx = page_to_pfn(page) - chunk->pfn_first; + drm = chunk->drm; + + /* + * FIXME: + * + * This is really a bad example, we need to overhaul nouveau memory + * management to be more page focus and allow lighter locking scheme + * to be use in the process. + */ + mutex_lock(&drm->dmem->mutex); + clear_bit(idx, chunk->bitmap); + WARN_ON(!chunk->callocated); + chunk->callocated--; + mutex_unlock(&drm->dmem->mutex); +} + +static void +nouveau_dmem_fault_alloc_and_copy(struct vm_area_struct *vma, + const unsigned long *src_pfns, + unsigned long *dst_pfns, + unsigned long start, + unsigned long end, + void *private) +{ + struct nouveau_dmem_fault *fault = private; + struct nouveau_drm *drm = fault->drm; + unsigned long addr, i, c, npages = 0; + nouveau_migrate_copy_t copy; + int ret; + + + /* First allocate new memory */ + for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { + struct page *dpage, *spage; + + dst_pfns[i] = 0; + spage = migrate_pfn_to_page(src_pfns[i]); + if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) + continue; + + dpage = hmm_vma_alloc_locked_page(vma, addr); + if (!dpage) { + dst_pfns[i] = MIGRATE_PFN_ERROR; + continue; + } + + dst_pfns[i] = migrate_pfn(page_to_pfn(dpage)) | + MIGRATE_PFN_LOCKED; + npages++; + } + + /* Create scatter list FIXME: get rid of scatter list */ + ret = nouveau_migrate_hmem_init(drm, &fault->hmem, npages, dst_pfns); + if (ret) + goto error; + + /* Copy things over */ + copy = drm->dmem->migrate.copy_func; + for (addr = start, i = c = 0; addr < end; addr += PAGE_SIZE, i++) { + struct nouveau_dmem_chunk *chunk; + struct page *spage, *dpage; + u64 src_addr, dst_addr; + + dpage = migrate_pfn_to_page(dst_pfns[i]); + if (!dpage || dst_pfns[i] == MIGRATE_PFN_ERROR) + continue; + + dst_addr = fault->hmem.vma.addr + (c << PAGE_SHIFT); + c++; + + spage = migrate_pfn_to_page(src_pfns[i]); + if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) { + dst_pfns[i] = MIGRATE_PFN_ERROR; + __free_page(dpage); + continue; + } + + chunk = (void *)hmm_devmem_page_get_drvdata(spage); + src_addr = page_to_pfn(spage) - chunk->pfn_first; + src_addr = (src_addr << PAGE_SHIFT) + chunk->vma.addr; + + ret = copy(drm, 1, dst_addr, src_addr); + if (ret) { + dst_pfns[i] = MIGRATE_PFN_ERROR; + __free_page(dpage); + continue; + } + } + + nouveau_fence_new(drm->dmem->migrate.chan, false, &fault->fence); + + return; + +error: + for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, ++i) { + struct page *page; + + if (!dst_pfns[i] || dst_pfns[i] == MIGRATE_PFN_ERROR) + continue; + + page = migrate_pfn_to_page(dst_pfns[i]); + dst_pfns[i] = MIGRATE_PFN_ERROR; + if (page == NULL) + continue; + + __free_page(page); + } +} + +void nouveau_dmem_fault_finalize_and_map(struct vm_area_struct *vma, + const unsigned long *src_pfns, + const unsigned long *dst_pfns, + unsigned long start, + unsigned long end, + void *private) +{ + struct nouveau_dmem_fault *fault = private; + struct nouveau_drm *drm = fault->drm; + + if (fault->fence) { + nouveau_fence_wait(fault->fence, true, false); + nouveau_fence_unref(&fault->fence); + } else { + /* + * FIXME wait for channel to be IDLE before calling finalizing + * the hmem object below (nouveau_migrate_hmem_fini()). + */ + } + nouveau_migrate_hmem_fini(drm, &fault->hmem); +} + +static const struct migrate_vma_ops nouveau_dmem_fault_migrate_ops = { + .alloc_and_copy = nouveau_dmem_fault_alloc_and_copy, + .finalize_and_map = nouveau_dmem_fault_finalize_and_map, +}; + +static int +nouveau_dmem_fault(struct hmm_devmem *devmem, + struct vm_area_struct *vma, + unsigned long addr, + const struct page *page, + unsigned int flags, + pmd_t *pmdp) +{ + unsigned long src[1] = {0}, dst[1] = {0}; + struct nouveau_dmem_fault fault = {0}; + int ret; + + /* + * FIXME what we really want is to find some heuristic to migrate more + * than just one page on CPU fault. When such fault happens it is very + * likely that more surrounding page will CPU fault too. + */ + fault.drm = devmem->private; + ret = migrate_vma(&nouveau_dmem_fault_migrate_ops, vma, addr, + addr + PAGE_SIZE, src, dst, &fault); + if (ret) + return VM_FAULT_SIGBUS; + + if (dst[0] == MIGRATE_PFN_ERROR) + return VM_FAULT_SIGBUS; + + return 0; +} + +static const struct hmm_devmem_ops +nouveau_dmem_devmem_ops = { + .free = nouveau_dmem_free, + .fault = nouveau_dmem_fault, +}; + +static int +nouveau_dmem_chunk_alloc(struct nouveau_drm *drm) +{ + struct nvif_vmm *vmm = &drm->client.vmm.vmm; + struct nouveau_dmem_chunk *chunk; + int ret; + + if (drm->dmem == NULL) + return -EINVAL; + + mutex_lock(&drm->dmem->mutex); + chunk = list_first_entry_or_null(&drm->dmem->chunk_empty, + struct nouveau_dmem_chunk, + list); + if (chunk == NULL) { + mutex_unlock(&drm->dmem->mutex); + return -ENOMEM; + } + + list_del(&chunk->list); + mutex_unlock(&drm->dmem->mutex); + + ret = nvif_vmm_get(vmm, LAZY, false, 12, 0, + DMEM_CHUNK_SIZE, &chunk->vma); + if (ret) + goto out; + + ret = nouveau_bo_new(&drm->client, DMEM_CHUNK_SIZE, 0, + TTM_PL_FLAG_VRAM, 0, 0, NULL, NULL, + &chunk->bo); + if (ret) + goto out; + + ret = nouveau_bo_pin(chunk->bo, TTM_PL_FLAG_VRAM, false); + if (ret) { + nouveau_bo_ref(NULL, &chunk->bo); + goto out; + } + + ret = nouveau_mem_map(nouveau_mem(&chunk->bo->bo.mem), vmm, &chunk->vma); + if (ret) { + nouveau_bo_unpin(chunk->bo); + nouveau_bo_ref(NULL, &chunk->bo); + goto out; + } + + bitmap_zero(chunk->bitmap, DMEM_CHUNK_NPAGES); + +out: + mutex_lock(&drm->dmem->mutex); + if (chunk->bo) + list_add(&chunk->list, &drm->dmem->chunk_empty); + else + list_add_tail(&chunk->list, &drm->dmem->chunk_empty); + mutex_unlock(&drm->dmem->mutex); + + return ret; +} + +static struct nouveau_dmem_chunk * +nouveau_dmem_chunk_first_free_locked(struct nouveau_drm *drm) +{ + struct nouveau_dmem_chunk *chunk; + + chunk = list_first_entry_or_null(&drm->dmem->chunk_free, + struct nouveau_dmem_chunk, + list); + if (chunk) + return chunk; + + chunk = list_first_entry_or_null(&drm->dmem->chunk_empty, + struct nouveau_dmem_chunk, + list); + if (chunk->bo) + return chunk; + + return NULL; +} + +static int +nouveau_dmem_pages_alloc(struct nouveau_drm *drm, + unsigned long npages, + unsigned long *pages) +{ + struct nouveau_dmem_chunk *chunk; + unsigned long c; + int ret; + + memset(pages, 0xff, npages * sizeof(*pages)); + + mutex_lock(&drm->dmem->mutex); + for (c = 0; c < npages;) { + unsigned long i; + + chunk = nouveau_dmem_chunk_first_free_locked(drm); + if (chunk == NULL) { + mutex_unlock(&drm->dmem->mutex); + ret = nouveau_dmem_chunk_alloc(drm); + if (ret) { + if (c) + break; + return ret; + } + continue; + } + + i = find_first_zero_bit(chunk->bitmap, DMEM_CHUNK_NPAGES); + while (i < DMEM_CHUNK_NPAGES && c < npages) { + pages[c] = chunk->pfn_first + i; + set_bit(i, chunk->bitmap); + chunk->callocated++; + c++; + + i = find_next_zero_bit(chunk->bitmap, + DMEM_CHUNK_NPAGES, i); + } + } + mutex_unlock(&drm->dmem->mutex); + + return 0; +} + +static struct page * +nouveau_dmem_page_alloc_locked(struct nouveau_drm *drm) +{ + unsigned long pfns[1]; + struct page *page; + int ret; + + /* FIXME stop all the miss-match API ... */ + ret = nouveau_dmem_pages_alloc(drm, 1, pfns); + if (ret) + return NULL; + + page = pfn_to_page(pfns[0]); + get_page(page); + lock_page(page); + return page; +} + +static void +nouveau_dmem_pages_free(struct nouveau_drm *drm, + unsigned long npages, + unsigned long *pages) +{ + unsigned long i; + + mutex_lock(&drm->dmem->mutex); + for (i = 0; i < npages;) { + struct nouveau_dmem_chunk *chunk; + unsigned long idx; + struct page *page; + + if (pages[i] == -1UL) + continue; + + page = pfn_to_page(pages[i]); + chunk = (void *)hmm_devmem_page_get_drvdata(page); + + idx = pages[i] - chunk->pfn_first; + clear_bit(idx, chunk->bitmap); + WARN_ON(!chunk->callocated); + chunk->callocated--; + pages[i] = -1UL; + } + mutex_unlock(&drm->dmem->mutex); +} + +static void +nouveau_dmem_page_free_locked(struct nouveau_drm *drm, struct page *page) +{ + unlock_page(page); + put_page(page); +} + +void +nouveau_dmem_resume(struct nouveau_drm *drm) +{ + struct nouveau_dmem_chunk *chunk; + int ret; + + if (drm->dmem == NULL) + return; + + mutex_lock(&drm->dmem->mutex); + list_for_each_entry (chunk, &drm->dmem->chunk_free, list) { + ret = nouveau_bo_pin(chunk->bo, TTM_PL_FLAG_VRAM, false); + /* FIXME handle pin failure */ + WARN_ON(ret); + } + list_for_each_entry (chunk, &drm->dmem->chunk_full, list) { + ret = nouveau_bo_pin(chunk->bo, TTM_PL_FLAG_VRAM, false); + /* FIXME handle pin failure */ + WARN_ON(ret); + } + list_for_each_entry (chunk, &drm->dmem->chunk_empty, list) { + ret = nouveau_bo_pin(chunk->bo, TTM_PL_FLAG_VRAM, false); + /* FIXME handle pin failure */ + WARN_ON(ret); + } + mutex_unlock(&drm->dmem->mutex); +} + +void +nouveau_dmem_suspend(struct nouveau_drm *drm) +{ + struct nouveau_dmem_chunk *chunk; + + if (drm->dmem == NULL) + return; + + mutex_lock(&drm->dmem->mutex); + list_for_each_entry (chunk, &drm->dmem->chunk_free, list) { + nouveau_bo_unpin(chunk->bo); + } + list_for_each_entry (chunk, &drm->dmem->chunk_full, list) { + nouveau_bo_unpin(chunk->bo); + } + list_for_each_entry (chunk, &drm->dmem->chunk_empty, list) { + nouveau_bo_unpin(chunk->bo); + } + mutex_unlock(&drm->dmem->mutex); +} + +void +nouveau_dmem_fini(struct nouveau_drm *drm) +{ + struct nvif_vmm *vmm = &drm->client.vmm.vmm; + struct nouveau_dmem_chunk *chunk, *tmp; + + if (drm->dmem == NULL) + return; + + mutex_lock(&drm->dmem->mutex); + + WARN_ON(!list_empty(&drm->dmem->chunk_free)); + WARN_ON(!list_empty(&drm->dmem->chunk_full)); + + list_for_each_entry_safe (chunk, tmp, &drm->dmem->chunk_empty, list) { + if (chunk->bo) { + nouveau_bo_unpin(chunk->bo); + nouveau_bo_ref(NULL, &chunk->bo); + } + nvif_vmm_put(vmm, &chunk->vma); + list_del(&chunk->list); + kfree(chunk); + } + + mutex_unlock(&drm->dmem->mutex); + + hmm_devmem_remove(drm->dmem->devmem); + kfree(drm->dmem); +} + +static int +nvc0_migrate_init(struct nouveau_channel *chan, u32 handle) +{ + int ret = RING_SPACE(chan, 2); + if (ret == 0) { + BEGIN_NVC0(chan, NvSubCopy, 0x0000, 1); + OUT_RING (chan, handle); + } + return ret; +} + +static int +nvc0_migrate_copy(struct nouveau_drm *drm, u64 npages, + u64 dst_addr, u64 src_addr) +{ + struct nouveau_channel *chan = drm->dmem->migrate.chan; + int ret; + + while (npages) { + u64 line_count = (npages > 8191) ? 8191 : npages; + + ret = RING_SPACE(chan, 11); + if (ret) + return ret; + + BEGIN_NVC0(chan, NvSubCopy, 0x030c, 8); + OUT_RING (chan, upper_32_bits(src_addr)); + OUT_RING (chan, lower_32_bits(src_addr)); + OUT_RING (chan, upper_32_bits(dst_addr)); + OUT_RING (chan, lower_32_bits(dst_addr)); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, line_count); + BEGIN_NVC0(chan, NvSubCopy, 0x0300, 1); + OUT_RING (chan, 0x00000110); + + npages -= line_count; + src_addr += (line_count << PAGE_SHIFT); + dst_addr += (line_count << PAGE_SHIFT); + } + + return 0; +} + +static int +nve0_migrate_init(struct nouveau_channel *chan, u32 handle) +{ + int ret = RING_SPACE(chan, 2); + if (ret == 0) { + BEGIN_NVC0(chan, NvSubCopy, 0x0000, 1); + OUT_RING (chan, handle & 0x0000ffff); + FIRE_RING (chan); + } + return ret; +} + +static int +nve0_migrate_copy(struct nouveau_drm *drm, u64 npages, + u64 dst_addr, u64 src_addr) +{ + struct nouveau_channel *chan = drm->dmem->migrate.chan; + int ret; + + ret = RING_SPACE(chan, 10); + if (ret) + return ret; + + BEGIN_NVC0(chan, NvSubCopy, 0x0400, 8); + OUT_RING (chan, upper_32_bits(src_addr)); + OUT_RING (chan, lower_32_bits(src_addr)); + OUT_RING (chan, upper_32_bits(dst_addr)); + OUT_RING (chan, lower_32_bits(dst_addr)); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, PAGE_SIZE); + OUT_RING (chan, npages); + BEGIN_IMC0(chan, NvSubCopy, 0x0300, 0x0386); + return 0; +} + +static int +nouveau_dmem_migrate_init(struct nouveau_drm *drm) +{ + static const struct { + const char *name; + int engine; + s32 oclass; + nouveau_migrate_copy_t copy_func; + int (*init)(struct nouveau_channel *, u32 handle); + } _methods[] = { + { "COPY", 4, 0xc3b5, nve0_migrate_copy, nve0_migrate_init }, + { "GRCE", 0, 0xc3b5, nve0_migrate_copy, nvc0_migrate_init }, + { "COPY", 4, 0xc1b5, nve0_migrate_copy, nve0_migrate_init }, + { "GRCE", 0, 0xc1b5, nve0_migrate_copy, nvc0_migrate_init }, + { "COPY", 4, 0xc0b5, nve0_migrate_copy, nve0_migrate_init }, + { "GRCE", 0, 0xc0b5, nve0_migrate_copy, nvc0_migrate_init }, + { "COPY", 4, 0xb0b5, nve0_migrate_copy, nve0_migrate_init }, + { "GRCE", 0, 0xb0b5, nve0_migrate_copy, nvc0_migrate_init }, + { "COPY", 4, 0xa0b5, nve0_migrate_copy, nve0_migrate_init }, + { "GRCE", 0, 0xa0b5, nve0_migrate_copy, nvc0_migrate_init }, + { "COPY1", 5, 0x90b8, nvc0_migrate_copy, nvc0_migrate_init }, + { "COPY0", 4, 0x90b5, nvc0_migrate_copy, nvc0_migrate_init }, + {}, + }, *mthd = _methods; + int ret; + + do { + struct nouveau_channel *chan; + + if (mthd->engine) + chan = drm->cechan; + else + chan = drm->channel; + if (chan == NULL) + continue; + + ret = nvif_object_init(&chan->user, + mthd->oclass | (mthd->engine << 16), + mthd->oclass, NULL, 0, + &drm->dmem->migrate.copy); + if (ret == 0) { + ret = mthd->init(chan, drm->dmem->migrate.copy.handle); + if (ret) { + nvif_object_fini(&drm->dmem->migrate.copy); + continue; + } + + drm->dmem->migrate.copy_func = mthd->copy_func; + drm->dmem->migrate.chan = chan; + return 0; + } + } while ((++mthd)->copy_func); + + return -ENODEV; +} + +void +nouveau_dmem_init(struct nouveau_drm *drm) +{ + struct device *device = drm->dev->dev; + unsigned long i, size; + int ret; + + /* This only make sense on PASCAL or newer */ + if (drm->client.device.info.family < NV_DEVICE_INFO_V0_PASCAL) + return; + + if (!(drm->dmem = kzalloc(sizeof(*drm->dmem), GFP_KERNEL))) + return; + + mutex_init(&drm->dmem->mutex); + INIT_LIST_HEAD(&drm->dmem->chunk_free); + INIT_LIST_HEAD(&drm->dmem->chunk_full); + INIT_LIST_HEAD(&drm->dmem->chunk_empty); + + size = ALIGN(drm->client.device.info.ram_user, DMEM_CHUNK_SIZE); + + /* Initialize migration dma helpers before registering memory */ + ret = nouveau_dmem_migrate_init(drm); + if (ret) { + kfree(drm->dmem); + drm->dmem = NULL; + return; + } + + /* + * FIXME we need some kind of policy to decide how much VRAM we + * want to register with HMM. For now just register everything + * and latter if we want to do thing like over commit then we + * could revisit this. + */ + drm->dmem->devmem = hmm_devmem_add(&nouveau_dmem_devmem_ops, device, + size, drm); + if (drm->dmem->devmem == NULL) { + kfree(drm->dmem); + drm->dmem = NULL; + return; + } + + for (i = 0; i < (size / DMEM_CHUNK_SIZE); ++i) { + struct nouveau_dmem_chunk *chunk; + struct page *page; + unsigned long j; + + chunk = kzalloc(sizeof(*chunk), GFP_KERNEL); + if (chunk == NULL) { + nouveau_dmem_fini(drm); + return; + } + + chunk->drm = drm; + chunk->pfn_first = drm->dmem->devmem->pfn_first; + chunk->pfn_first += (i * DMEM_CHUNK_NPAGES); + list_add_tail(&chunk->list, &drm->dmem->chunk_empty); + + page = pfn_to_page(chunk->pfn_first); + for (j = 0; j < DMEM_CHUNK_NPAGES; ++j, ++page) { + hmm_devmem_page_set_drvdata(page, (long)chunk); + } + } + + NV_INFO(drm, "DMEM: registered %ldMB of device memory\n", size >> 20); +} + +static void +nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma, + const unsigned long *src_pfns, + unsigned long *dst_pfns, + unsigned long start, + unsigned long end, + void *private) +{ + struct nouveau_migrate *migrate = private; + struct nouveau_drm *drm = migrate->drm; + unsigned long addr, i, c, npages = 0; + nouveau_migrate_copy_t copy; + int ret; + + /* First allocate new memory */ + for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, i++) { + struct page *dpage, *spage; + + dst_pfns[i] = 0; + spage = migrate_pfn_to_page(src_pfns[i]); + if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) + continue; + + dpage = nouveau_dmem_page_alloc_locked(drm); + if (!dpage) + continue; + + dst_pfns[i] = migrate_pfn(page_to_pfn(dpage)) | + MIGRATE_PFN_LOCKED | + MIGRATE_PFN_DEVICE; + npages++; + } + + /* Create scatter list FIXME: get rid of scatter list */ + ret = nouveau_migrate_hmem_init(drm, &migrate->hmem, npages, src_pfns); + if (ret) + goto error; + + /* Copy things over */ + copy = drm->dmem->migrate.copy_func; + for (addr = start, i = c = 0; addr < end; addr += PAGE_SIZE, i++) { + struct nouveau_dmem_chunk *chunk; + struct page *spage, *dpage; + u64 src_addr, dst_addr; + + dpage = migrate_pfn_to_page(dst_pfns[i]); + if (!dpage || dst_pfns[i] == MIGRATE_PFN_ERROR) + continue; + + chunk = (void *)hmm_devmem_page_get_drvdata(dpage); + dst_addr = page_to_pfn(dpage) - chunk->pfn_first; + dst_addr = (dst_addr << PAGE_SHIFT) + chunk->vma.addr; + + spage = migrate_pfn_to_page(src_pfns[i]); + if (!spage || !(src_pfns[i] & MIGRATE_PFN_MIGRATE)) { + nouveau_dmem_page_free_locked(drm, dpage); + dst_pfns[i] = 0; + continue; + } + + src_addr = migrate->hmem.vma.addr + (c << PAGE_SHIFT); + c++; + + ret = copy(drm, 1, dst_addr, src_addr); + if (ret) { + nouveau_dmem_page_free_locked(drm, dpage); + dst_pfns[i] = 0; + continue; + } + } + + nouveau_fence_new(drm->dmem->migrate.chan, false, &migrate->fence); + + return; + +error: + for (addr = start, i = 0; addr < end; addr += PAGE_SIZE, ++i) { + struct page *page; + + if (!dst_pfns[i] || dst_pfns[i] == MIGRATE_PFN_ERROR) + continue; + + page = migrate_pfn_to_page(dst_pfns[i]); + dst_pfns[i] = MIGRATE_PFN_ERROR; + if (page == NULL) + continue; + + __free_page(page); + } +} + +void nouveau_dmem_migrate_finalize_and_map(struct vm_area_struct *vma, + const unsigned long *src_pfns, + const unsigned long *dst_pfns, + unsigned long start, + unsigned long end, + void *private) +{ + struct nouveau_migrate *migrate = private; + struct nouveau_drm *drm = migrate->drm; + + if (migrate->fence) { + nouveau_fence_wait(migrate->fence, true, false); + nouveau_fence_unref(&migrate->fence); + } else { + /* + * FIXME wait for channel to be IDLE before calling finalizing + * the hmem object below (nouveau_migrate_hmem_fini()). + */ + } + nouveau_migrate_hmem_fini(drm, &migrate->hmem); + + /* FIXME update GPU page table to point to newly migrated memory */ +} + +static const struct migrate_vma_ops nouveau_dmem_migrate_ops = { + .alloc_and_copy = nouveau_dmem_migrate_alloc_and_copy, + .finalize_and_map = nouveau_dmem_migrate_finalize_and_map, +}; + +int +nouveau_dmem_migrate_vma(struct nouveau_drm *drm, + struct vm_area_struct *vma, + unsigned long start, + unsigned long end) +{ + unsigned long *src_pfns, *dst_pfns, npages; + struct nouveau_migrate migrate = {0}; + unsigned long i, c, max; + int ret = 0; + + npages = (end - start) >> PAGE_SHIFT; + max = min(SG_MAX_SINGLE_ALLOC, npages); + src_pfns = kzalloc(sizeof(long) * max, GFP_KERNEL); + if (src_pfns == NULL) + return -ENOMEM; + dst_pfns = kzalloc(sizeof(long) * max, GFP_KERNEL); + if (dst_pfns == NULL) { + kfree(src_pfns); + return -ENOMEM; + } + + migrate.drm = drm; + migrate.vma = vma; + migrate.npages = npages; + for (i = 0; i < npages; i += c) { + unsigned long next; + + c = min(SG_MAX_SINGLE_ALLOC, npages); + next = start + (c << PAGE_SHIFT); + ret = migrate_vma(&nouveau_dmem_migrate_ops, vma, start, + next, src_pfns, dst_pfns, &migrate); + if (ret) + goto out; + start = next; + } + +out: + kfree(dst_pfns); + kfree(src_pfns); + return ret; +} diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.h b/drivers/gpu/drm/nouveau/nouveau_dmem.h new file mode 100644 index 000000000000..afe0b5549818 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.h @@ -0,0 +1,39 @@ +/* + * Copyright 2018 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ +#ifndef __NOUVEAU_DMEM_H__ +#define __NOUVEAU_DMEM_H__ +#include <nvif/os.h> +struct drm_device; +struct drm_file; +struct nouveau_drm; + +void nouveau_dmem_init(struct nouveau_drm *); +void nouveau_dmem_fini(struct nouveau_drm *); +void nouveau_dmem_suspend(struct nouveau_drm *); +void nouveau_dmem_resume(struct nouveau_drm *); + +int nouveau_dmem_migrate_vma(struct nouveau_drm *drm, + struct vm_area_struct *vma, + unsigned long start, + unsigned long end); + +#endif diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index d871f6a5d82e..b5e68914c406 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -64,6 +64,7 @@ #include "nouveau_connector.h" #include "nouveau_platform.h" #include "nouveau_svm.h" +#include "nouveau_dmem.h" MODULE_PARM_DESC(config, "option string to pass to driver core"); static char *nouveau_config; @@ -577,6 +578,7 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags) nouveau_hwmon_init(dev); nouveau_svm_init(drm); nouveau_accel_init(drm); + nouveau_dmem_init(drm); nouveau_fbcon_init(dev); nouveau_led_init(dev); @@ -619,6 +621,7 @@ nouveau_drm_unload(struct drm_device *dev) nouveau_led_fini(dev); nouveau_fbcon_fini(dev); + nouveau_dmem_fini(drm); nouveau_accel_fini(drm); nouveau_svm_fini(drm); nouveau_hwmon_fini(dev); @@ -668,6 +671,7 @@ nouveau_do_suspend(struct drm_device *dev, bool runtime) int ret; nouveau_svm_suspend(drm); + nouveau_dmem_suspend(drm); nouveau_led_suspend(dev); if (dev->mode_config.num_crtc) { @@ -744,6 +748,7 @@ nouveau_do_resume(struct drm_device *dev, bool runtime) } nouveau_led_resume(dev); + nouveau_dmem_resume(drm); nouveau_svm_resume(drm); return 0; } diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index eb638c52851e..a00e79fe2f58 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -217,6 +217,8 @@ struct nouveau_drm { struct dev_pm_domain vga_pm_domain; struct nouveau_svm *svm; + + struct nouveau_dmem *dmem; }; static inline struct nouveau_drm * |