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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_vmm.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_vmm.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_vmm.c b/drivers/gpu/drm/nouveau/nouveau_vmm.c
new file mode 100644
index 000000000..29b5dedf6
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_vmm.c
@@ -0,0 +1,141 @@
+/*
+ * 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 "nouveau_vmm.h"
+#include "nouveau_drv.h"
+#include "nouveau_bo.h"
+#include "nouveau_svm.h"
+#include "nouveau_mem.h"
+
+void
+nouveau_vma_unmap(struct nouveau_vma *vma)
+{
+ if (vma->mem) {
+ nvif_vmm_unmap(&vma->vmm->vmm, vma->addr);
+ vma->mem = NULL;
+ }
+}
+
+int
+nouveau_vma_map(struct nouveau_vma *vma, struct nouveau_mem *mem)
+{
+ struct nvif_vma tmp = { .addr = vma->addr };
+ int ret = nouveau_mem_map(mem, &vma->vmm->vmm, &tmp);
+ if (ret)
+ return ret;
+ vma->mem = mem;
+ return 0;
+}
+
+struct nouveau_vma *
+nouveau_vma_find(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm)
+{
+ struct nouveau_vma *vma;
+
+ list_for_each_entry(vma, &nvbo->vma_list, head) {
+ if (vma->vmm == vmm)
+ return vma;
+ }
+
+ return NULL;
+}
+
+void
+nouveau_vma_del(struct nouveau_vma **pvma)
+{
+ struct nouveau_vma *vma = *pvma;
+ if (vma && --vma->refs <= 0) {
+ if (likely(vma->addr != ~0ULL)) {
+ struct nvif_vma tmp = { .addr = vma->addr, .size = 1 };
+ nvif_vmm_put(&vma->vmm->vmm, &tmp);
+ }
+ list_del(&vma->head);
+ kfree(*pvma);
+ }
+ *pvma = NULL;
+}
+
+int
+nouveau_vma_new(struct nouveau_bo *nvbo, struct nouveau_vmm *vmm,
+ struct nouveau_vma **pvma)
+{
+ struct nouveau_mem *mem = nouveau_mem(nvbo->bo.resource);
+ struct nouveau_vma *vma;
+ struct nvif_vma tmp;
+ int ret;
+
+ if ((vma = *pvma = nouveau_vma_find(nvbo, vmm))) {
+ vma->refs++;
+ return 0;
+ }
+
+ if (!(vma = *pvma = kmalloc(sizeof(*vma), GFP_KERNEL)))
+ return -ENOMEM;
+ vma->vmm = vmm;
+ vma->refs = 1;
+ vma->addr = ~0ULL;
+ vma->mem = NULL;
+ vma->fence = NULL;
+ list_add_tail(&vma->head, &nvbo->vma_list);
+
+ if (nvbo->bo.resource->mem_type != TTM_PL_SYSTEM &&
+ mem->mem.page == nvbo->page) {
+ ret = nvif_vmm_get(&vmm->vmm, LAZY, false, mem->mem.page, 0,
+ mem->mem.size, &tmp);
+ if (ret)
+ goto done;
+
+ vma->addr = tmp.addr;
+ ret = nouveau_vma_map(vma, mem);
+ } else {
+ ret = nvif_vmm_get(&vmm->vmm, PTES, false, mem->mem.page, 0,
+ mem->mem.size, &tmp);
+ if (ret)
+ goto done;
+
+ vma->addr = tmp.addr;
+ }
+
+done:
+ if (ret)
+ nouveau_vma_del(pvma);
+ return ret;
+}
+
+void
+nouveau_vmm_fini(struct nouveau_vmm *vmm)
+{
+ nouveau_svmm_fini(&vmm->svmm);
+ nvif_vmm_dtor(&vmm->vmm);
+ vmm->cli = NULL;
+}
+
+int
+nouveau_vmm_init(struct nouveau_cli *cli, s32 oclass, struct nouveau_vmm *vmm)
+{
+ int ret = nvif_vmm_ctor(&cli->mmu, "drmVmm", oclass, false, PAGE_SIZE,
+ 0, NULL, 0, &vmm->vmm);
+ if (ret)
+ return ret;
+
+ vmm->cli = cli;
+ return 0;
+}