353 lines
9.0 KiB
C
353 lines
9.0 KiB
C
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/*
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* Copyright 2017 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "uvmm.h"
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#include "umem.h"
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#include "ummu.h"
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#include <core/client.h>
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#include <core/memory.h>
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#include <nvif/if000c.h>
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#include <nvif/unpack.h>
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static const struct nvkm_object_func nvkm_uvmm;
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struct nvkm_vmm *
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nvkm_uvmm_search(struct nvkm_client *client, u64 handle)
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{
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struct nvkm_object *object;
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object = nvkm_object_search(client, handle, &nvkm_uvmm);
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if (IS_ERR(object))
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return (void *)object;
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return nvkm_uvmm(object)->vmm;
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}
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static int
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nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
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{
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struct nvkm_client *client = uvmm->object.client;
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union {
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struct nvif_vmm_unmap_v0 v0;
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} *args = argv;
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struct nvkm_vmm *vmm = uvmm->vmm;
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struct nvkm_vma *vma;
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int ret = -ENOSYS;
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u64 addr;
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
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addr = args->v0.addr;
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} else
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return ret;
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mutex_lock(&vmm->mutex);
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vma = nvkm_vmm_node_search(vmm, addr);
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if (ret = -ENOENT, !vma || vma->addr != addr) {
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VMM_DEBUG(vmm, "lookup %016llx: %016llx",
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addr, vma ? vma->addr : ~0ULL);
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goto done;
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}
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if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
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VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
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vma->user, !client->super, vma->busy);
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goto done;
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}
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if (ret = -EINVAL, !vma->memory) {
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VMM_DEBUG(vmm, "unmapped");
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goto done;
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}
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nvkm_vmm_unmap_locked(vmm, vma);
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ret = 0;
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done:
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mutex_unlock(&vmm->mutex);
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return ret;
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}
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static int
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nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
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{
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struct nvkm_client *client = uvmm->object.client;
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union {
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struct nvif_vmm_map_v0 v0;
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} *args = argv;
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u64 addr, size, handle, offset;
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struct nvkm_vmm *vmm = uvmm->vmm;
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struct nvkm_vma *vma;
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struct nvkm_memory *memory;
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int ret = -ENOSYS;
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
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addr = args->v0.addr;
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size = args->v0.size;
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handle = args->v0.memory;
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offset = args->v0.offset;
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} else
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return ret;
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if (IS_ERR((memory = nvkm_umem_search(client, handle)))) {
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VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
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return PTR_ERR(memory);
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}
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mutex_lock(&vmm->mutex);
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if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
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VMM_DEBUG(vmm, "lookup %016llx", addr);
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goto fail;
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}
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if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
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VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
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vma->user, !client->super, vma->busy);
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goto fail;
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}
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if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
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if (addr + size > vma->addr + vma->size || vma->memory ||
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(vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
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VMM_DEBUG(vmm, "split %d %d %d "
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"%016llx %016llx %016llx %016llx",
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!!vma->memory, vma->refd, vma->mapref,
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addr, size, vma->addr, (u64)vma->size);
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goto fail;
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}
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if (vma->addr != addr) {
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const u64 tail = vma->size + vma->addr - addr;
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if (ret = -ENOMEM, !(vma = nvkm_vma_tail(vma, tail)))
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goto fail;
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vma->part = true;
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nvkm_vmm_node_insert(vmm, vma);
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}
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if (vma->size != size) {
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const u64 tail = vma->size - size;
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struct nvkm_vma *tmp;
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if (ret = -ENOMEM, !(tmp = nvkm_vma_tail(vma, tail))) {
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nvkm_vmm_unmap_region(vmm, vma);
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goto fail;
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}
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tmp->part = true;
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nvkm_vmm_node_insert(vmm, tmp);
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}
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}
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vma->busy = true;
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mutex_unlock(&vmm->mutex);
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ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
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if (ret == 0) {
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/* Successful map will clear vma->busy. */
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nvkm_memory_unref(&memory);
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return 0;
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}
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mutex_lock(&vmm->mutex);
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vma->busy = false;
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nvkm_vmm_unmap_region(vmm, vma);
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fail:
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mutex_unlock(&vmm->mutex);
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nvkm_memory_unref(&memory);
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return ret;
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}
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static int
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nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
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{
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struct nvkm_client *client = uvmm->object.client;
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union {
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struct nvif_vmm_put_v0 v0;
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} *args = argv;
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struct nvkm_vmm *vmm = uvmm->vmm;
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struct nvkm_vma *vma;
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int ret = -ENOSYS;
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u64 addr;
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
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addr = args->v0.addr;
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} else
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return ret;
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mutex_lock(&vmm->mutex);
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vma = nvkm_vmm_node_search(vmm, args->v0.addr);
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if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
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VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
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vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
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goto done;
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}
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if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
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VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
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vma->user, !client->super, vma->busy);
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goto done;
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}
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nvkm_vmm_put_locked(vmm, vma);
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ret = 0;
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done:
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mutex_unlock(&vmm->mutex);
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return ret;
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}
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static int
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nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
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{
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struct nvkm_client *client = uvmm->object.client;
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union {
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struct nvif_vmm_get_v0 v0;
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} *args = argv;
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struct nvkm_vmm *vmm = uvmm->vmm;
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struct nvkm_vma *vma;
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int ret = -ENOSYS;
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bool getref, mapref, sparse;
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u8 page, align;
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u64 size;
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
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getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
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mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
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sparse = args->v0.sparse;
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page = args->v0.page;
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align = args->v0.align;
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size = args->v0.size;
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} else
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return ret;
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mutex_lock(&vmm->mutex);
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ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
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page, align, size, &vma);
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mutex_unlock(&vmm->mutex);
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if (ret)
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return ret;
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args->v0.addr = vma->addr;
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vma->user = !client->super;
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return ret;
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}
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static int
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nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
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{
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union {
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struct nvif_vmm_page_v0 v0;
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} *args = argv;
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const struct nvkm_vmm_page *page;
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int ret = -ENOSYS;
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u8 type, index, nr;
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page = uvmm->vmm->func->page;
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for (nr = 0; page[nr].shift; nr++);
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
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if ((index = args->v0.index) >= nr)
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return -EINVAL;
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type = page[index].type;
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args->v0.shift = page[index].shift;
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args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
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args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
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args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
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args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
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} else
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return -ENOSYS;
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return 0;
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}
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static int
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nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
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{
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struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
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switch (mthd) {
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case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
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case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
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case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
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case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
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case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
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default:
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break;
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}
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return -EINVAL;
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}
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static void *
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nvkm_uvmm_dtor(struct nvkm_object *object)
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{
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struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
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nvkm_vmm_unref(&uvmm->vmm);
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return uvmm;
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}
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static const struct nvkm_object_func
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nvkm_uvmm = {
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.dtor = nvkm_uvmm_dtor,
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.mthd = nvkm_uvmm_mthd,
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};
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int
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nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
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struct nvkm_object **pobject)
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{
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struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
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const bool more = oclass->base.maxver >= 0;
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union {
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struct nvif_vmm_v0 v0;
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} *args = argv;
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const struct nvkm_vmm_page *page;
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struct nvkm_uvmm *uvmm;
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int ret = -ENOSYS;
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u64 addr, size;
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if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
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addr = args->v0.addr;
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size = args->v0.size;
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} else
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return ret;
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if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
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return -ENOMEM;
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nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
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*pobject = &uvmm->object;
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if (!mmu->vmm) {
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ret = mmu->func->vmm.ctor(mmu, addr, size, argv, argc,
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NULL, "user", &uvmm->vmm);
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if (ret)
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return ret;
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uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
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} else {
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if (size)
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return -EINVAL;
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uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
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}
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page = uvmm->vmm->func->page;
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args->v0.page_nr = 0;
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while (page && (page++)->shift)
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args->v0.page_nr++;
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args->v0.addr = uvmm->vmm->start;
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args->v0.size = uvmm->vmm->limit;
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||
|
|
return 0;
|
||
|
|
}
|