drm/nouveau: separate buffer object backing memory from nvkm structures

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
new file mode 100644
index 000000000000..68ac332841ae
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -0,0 +1,114 @@
+/*
+ * 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_mem.h"
+#include "nouveau_drv.h"
+#include "nouveau_bo.h"
+
+#include <drm/ttm/ttm_bo_driver.h>
+
+int
+nouveau_mem_map(struct nouveau_mem *mem,
+		struct nvkm_vmm *vmm, struct nvkm_vma *vma)
+{
+	nvkm_vm_map(vma, mem->_mem);
+	return 0;
+}
+
+void
+nouveau_mem_fini(struct nouveau_mem *mem)
+{
+	if (mem->vma[1].node) {
+		nvkm_vm_unmap(&mem->vma[1]);
+		nvkm_vm_put(&mem->vma[1]);
+	}
+	if (mem->vma[0].node) {
+		nvkm_vm_unmap(&mem->vma[0]);
+		nvkm_vm_put(&mem->vma[0]);
+	}
+}
+
+int
+nouveau_mem_host(struct ttm_mem_reg *reg, struct ttm_dma_tt *tt)
+{
+	struct nouveau_mem *mem = nouveau_mem(reg);
+	struct nouveau_cli *cli = mem->cli;
+
+	if (mem->kind && cli->device.info.chipset == 0x50)
+		mem->comp = mem->kind = 0;
+	if (mem->comp) {
+		if (cli->device.info.chipset >= 0xc0)
+			mem->kind = gf100_pte_storage_type_map[mem->kind];
+		mem->comp = 0;
+	}
+
+	mem->__mem.size = (reg->num_pages << PAGE_SHIFT) >> 12;
+	mem->__mem.memtype = (mem->comp << 7) | mem->kind;
+	if (tt->ttm.sg) mem->__mem.sg    = tt->ttm.sg;
+	else            mem->__mem.pages = tt->dma_address;
+	mem->_mem = &mem->__mem;
+	mem->mem.page = 12;
+	return 0;
+}
+
+int
+nouveau_mem_vram(struct ttm_mem_reg *reg, bool contig, u8 page)
+{
+	struct nouveau_mem *mem = nouveau_mem(reg);
+	struct nvkm_ram *ram = nvxx_fb(&mem->cli->device)->ram;
+	u64 size = ALIGN(reg->num_pages << PAGE_SHIFT, 1 << page);
+	int ret;
+
+	mem->mem.page = page;
+
+	ret = ram->func->get(ram, size, 1 << page, contig ? 0 : 1 << page,
+			     (mem->comp << 8) | mem->kind, &mem->_mem);
+	if (ret)
+		return ret;
+
+	reg->start = mem->_mem->offset >> PAGE_SHIFT;
+	return ret;
+}
+
+void
+nouveau_mem_del(struct ttm_mem_reg *reg)
+{
+	struct nouveau_mem *mem = nouveau_mem(reg);
+	nouveau_mem_fini(mem);
+	kfree(reg->mm_node);
+	reg->mm_node = NULL;
+}
+
+int
+nouveau_mem_new(struct nouveau_cli *cli, u8 kind, u8 comp,
+		struct ttm_mem_reg *reg)
+{
+	struct nouveau_mem *mem;
+
+	if (!(mem = kzalloc(sizeof(*mem), GFP_KERNEL)))
+		return -ENOMEM;
+	mem->cli = cli;
+	mem->kind = kind;
+	mem->comp = comp;
+
+	reg->mm_node = mem;
+	return 0;
+}