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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
new file mode 100644
index 000000000000..fa81d0c1ba41
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c
@@ -0,0 +1,352 @@
+/*
+ * Copyright 2017 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 "uvmm.h"
+#include "umem.h"
+#include "ummu.h"
+
+#include <core/client.h>
+#include <core/memory.h>
+
+#include <nvif/if000c.h>
+#include <nvif/unpack.h>
+
+static const struct nvkm_object_func nvkm_uvmm;
+struct nvkm_vmm *
+nvkm_uvmm_search(struct nvkm_client *client, u64 handle)
+{
+ struct nvkm_object *object;
+
+ object = nvkm_object_search(client, handle, &nvkm_uvmm);
+ if (IS_ERR(object))
+ return (void *)object;
+
+ return nvkm_uvmm(object)->vmm;
+}
+
+static int
+nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_unmap_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ u64 addr;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ addr = args->v0.addr;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ vma = nvkm_vmm_node_search(vmm, addr);
+ if (ret = -ENOENT, !vma || vma->addr != addr) {
+ VMM_DEBUG(vmm, "lookup %016llx: %016llx",
+ addr, vma ? vma->addr : ~0ULL);
+ goto done;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto done;
+ }
+
+ if (ret = -EINVAL, !vma->memory) {
+ VMM_DEBUG(vmm, "unmapped");
+ goto done;
+ }
+
+ nvkm_vmm_unmap_locked(vmm, vma);
+ ret = 0;
+done:
+ mutex_unlock(&vmm->mutex);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_map_v0 v0;
+ } *args = argv;
+ u64 addr, size, handle, offset;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ struct nvkm_memory *memory;
+ int ret = -ENOSYS;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
+ addr = args->v0.addr;
+ size = args->v0.size;
+ handle = args->v0.memory;
+ offset = args->v0.offset;
+ } else
+ return ret;
+
+ if (IS_ERR((memory = nvkm_umem_search(client, handle)))) {
+ VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
+ return PTR_ERR(memory);
+ }
+
+ mutex_lock(&vmm->mutex);
+ if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
+ VMM_DEBUG(vmm, "lookup %016llx", addr);
+ goto fail;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto fail;
+ }
+
+ if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
+ if (addr + size > vma->addr + vma->size || vma->memory ||
+ (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
+ VMM_DEBUG(vmm, "split %d %d %d "
+ "%016llx %016llx %016llx %016llx",
+ !!vma->memory, vma->refd, vma->mapref,
+ addr, size, vma->addr, (u64)vma->size);
+ goto fail;
+ }
+
+ if (vma->addr != addr) {
+ const u64 tail = vma->size + vma->addr - addr;
+ if (ret = -ENOMEM, !(vma = nvkm_vma_tail(vma, tail)))
+ goto fail;
+ vma->part = true;
+ nvkm_vmm_node_insert(vmm, vma);
+ }
+
+ if (vma->size != size) {
+ const u64 tail = vma->size - size;
+ struct nvkm_vma *tmp;
+ if (ret = -ENOMEM, !(tmp = nvkm_vma_tail(vma, tail))) {
+ nvkm_vmm_unmap_region(vmm, vma);
+ goto fail;
+ }
+ tmp->part = true;
+ nvkm_vmm_node_insert(vmm, tmp);
+ }
+ }
+ vma->busy = true;
+ mutex_unlock(&vmm->mutex);
+
+ ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
+ if (ret == 0) {
+ /* Successful map will clear vma->busy. */
+ nvkm_memory_unref(&memory);
+ return 0;
+ }
+
+ mutex_lock(&vmm->mutex);
+ vma->busy = false;
+ nvkm_vmm_unmap_region(vmm, vma);
+fail:
+ mutex_unlock(&vmm->mutex);
+ nvkm_memory_unref(&memory);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_put_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ u64 addr;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ addr = args->v0.addr;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ vma = nvkm_vmm_node_search(vmm, args->v0.addr);
+ if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
+ VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
+ vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
+ goto done;
+ }
+
+ if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
+ VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
+ vma->user, !client->super, vma->busy);
+ goto done;
+ }
+
+ nvkm_vmm_put_locked(vmm, vma);
+ ret = 0;
+done:
+ mutex_unlock(&vmm->mutex);
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ struct nvkm_client *client = uvmm->object.client;
+ union {
+ struct nvif_vmm_get_v0 v0;
+ } *args = argv;
+ struct nvkm_vmm *vmm = uvmm->vmm;
+ struct nvkm_vma *vma;
+ int ret = -ENOSYS;
+ bool getref, mapref, sparse;
+ u8 page, align;
+ u64 size;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
+ mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
+ sparse = args->v0.sparse;
+ page = args->v0.page;
+ align = args->v0.align;
+ size = args->v0.size;
+ } else
+ return ret;
+
+ mutex_lock(&vmm->mutex);
+ ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
+ page, align, size, &vma);
+ mutex_unlock(&vmm->mutex);
+ if (ret)
+ return ret;
+
+ args->v0.addr = vma->addr;
+ vma->user = !client->super;
+ return ret;
+}
+
+static int
+nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
+{
+ union {
+ struct nvif_vmm_page_v0 v0;
+ } *args = argv;
+ const struct nvkm_vmm_page *page;
+ int ret = -ENOSYS;
+ u8 type, index, nr;
+
+ page = uvmm->vmm->func->page;
+ for (nr = 0; page[nr].shift; nr++);
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+ if ((index = args->v0.index) >= nr)
+ return -EINVAL;
+ type = page[index].type;
+ args->v0.shift = page[index].shift;
+ args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
+ args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
+ args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
+ args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
+ } else
+ return -ENOSYS;
+
+ 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);
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+static void *
+nvkm_uvmm_dtor(struct nvkm_object *object)
+{
+ struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
+ nvkm_vmm_unref(&uvmm->vmm);
+ return uvmm;
+}
+
+static const struct nvkm_object_func
+nvkm_uvmm = {
+ .dtor = nvkm_uvmm_dtor,
+ .mthd = nvkm_uvmm_mthd,
+};
+
+int
+nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
+ struct nvkm_object **pobject)
+{
+ struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
+ const bool more = oclass->base.maxver >= 0;
+ union {
+ struct nvif_vmm_v0 v0;
+ } *args = argv;
+ const struct nvkm_vmm_page *page;
+ struct nvkm_uvmm *uvmm;
+ int ret = -ENOSYS;
+ u64 addr, size;
+
+ if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
+ addr = args->v0.addr;
+ size = args->v0.size;
+ } else
+ return ret;
+
+ if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
+ return -ENOMEM;
+ nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
+ *pobject = &uvmm->object;
+
+ if (!mmu->vmm) {
+ ret = mmu->func->vmm.ctor(mmu, addr, size, argv, argc,
+ NULL, "user", &uvmm->vmm);
+ if (ret)
+ return ret;
+
+ uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
+ } else {
+ if (size)
+ return -EINVAL;
+
+ uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
+ }
+
+ page = uvmm->vmm->func->page;
+ args->v0.page_nr = 0;
+ while (page && (page++)->shift)
+ args->v0.page_nr++;
+ args->v0.addr = uvmm->vmm->start;
+ args->v0.size = uvmm->vmm->limit;
+ return 0;
+}