1 files changed, 135 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 000000000000..f5371d96b003
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_vmm.c
@@ -0,0 +1,135 @@
+/*
+ * 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_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.mem);
+	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;
+	list_add_tail(&vma->head, &nvbo->vma_list);
+
+	if (nvbo->bo.mem.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);
+		vma->addr = tmp.addr;
+	}
+
+done:
+	if (ret)
+		nouveau_vma_del(pvma);
+	return ret;
+}
+
+void
+nouveau_vmm_fini(struct nouveau_vmm *vmm)
+{
+	nvif_vmm_fini(&vmm->vmm);
+	vmm->cli = NULL;
+}
+
+int
+nouveau_vmm_init(struct nouveau_cli *cli, s32 oclass, struct nouveau_vmm *vmm)
+{
+	int ret = nvif_vmm_init(&cli->mmu, oclass, PAGE_SIZE, 0, NULL, 0,
+				&vmm->vmm);
+	if (ret)
+		return ret;
+
+	vmm->cli = cli;
+	return 0;
+}