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Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_agp_backend.c')
-rw-r--r--drivers/gpu/drm/ttm/ttm_agp_backend.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
new file mode 100644
index 00000000000..e8f6d2229d8
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -0,0 +1,150 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ * Keith Packard.
+ */
+
+#include "ttm/ttm_module.h"
+#include "ttm/ttm_bo_driver.h"
+#ifdef TTM_HAS_AGP
+#include "ttm/ttm_placement.h"
+#include <linux/agp_backend.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <asm/agp.h>
+
+struct ttm_agp_backend {
+ struct ttm_backend backend;
+ struct agp_memory *mem;
+ struct agp_bridge_data *bridge;
+};
+
+static int ttm_agp_populate(struct ttm_backend *backend,
+ unsigned long num_pages, struct page **pages,
+ struct page *dummy_read_page)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct page **cur_page, **last_page = pages + num_pages;
+ struct agp_memory *mem;
+
+ mem = agp_allocate_memory(agp_be->bridge, num_pages, AGP_USER_MEMORY);
+ if (unlikely(mem == NULL))
+ return -ENOMEM;
+
+ mem->page_count = 0;
+ for (cur_page = pages; cur_page < last_page; ++cur_page) {
+ struct page *page = *cur_page;
+ if (!page)
+ page = dummy_read_page;
+
+ mem->memory[mem->page_count++] =
+ phys_to_gart(page_to_phys(page));
+ }
+ agp_be->mem = mem;
+ return 0;
+}
+
+static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct agp_memory *mem = agp_be->mem;
+ int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
+ int ret;
+
+ mem->is_flushed = 1;
+ mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
+
+ ret = agp_bind_memory(mem, bo_mem->mm_node->start);
+ if (ret)
+ printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n");
+
+ return ret;
+}
+
+static int ttm_agp_unbind(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+
+ if (agp_be->mem->is_bound)
+ return agp_unbind_memory(agp_be->mem);
+ else
+ return 0;
+}
+
+static void ttm_agp_clear(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+ struct agp_memory *mem = agp_be->mem;
+
+ if (mem) {
+ ttm_agp_unbind(backend);
+ agp_free_memory(mem);
+ }
+ agp_be->mem = NULL;
+}
+
+static void ttm_agp_destroy(struct ttm_backend *backend)
+{
+ struct ttm_agp_backend *agp_be =
+ container_of(backend, struct ttm_agp_backend, backend);
+
+ if (agp_be->mem)
+ ttm_agp_clear(backend);
+ kfree(agp_be);
+}
+
+static struct ttm_backend_func ttm_agp_func = {
+ .populate = ttm_agp_populate,
+ .clear = ttm_agp_clear,
+ .bind = ttm_agp_bind,
+ .unbind = ttm_agp_unbind,
+ .destroy = ttm_agp_destroy,
+};
+
+struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
+ struct agp_bridge_data *bridge)
+{
+ struct ttm_agp_backend *agp_be;
+
+ agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
+ if (!agp_be)
+ return NULL;
+
+ agp_be->mem = NULL;
+ agp_be->bridge = bridge;
+ agp_be->backend.func = &ttm_agp_func;
+ agp_be->backend.bdev = bdev;
+ return &agp_be->backend;
+}
+EXPORT_SYMBOL(ttm_agp_backend_init);
+
+#endif