diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 21:20:39 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 21:20:39 -0700 |
commit | 8d15b0ec32f20a57881dc073b2e8d11dea0ccceb (patch) | |
tree | 8aa3d4dfd0660807c3ce2893b35292b3b0e3bf08 /drivers/gpu/drm/ttm/ttm_agp_backend.c | |
parent | 005411c3e9147bc3b78215390e847d688dbbc163 (diff) | |
parent | cc8da5263fa743c33d6503f85113bcb70048e633 (diff) |
Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon: switch to using late_initcall
radeon legacy chips: tv dac bg/dac adj updates
drm/radeon: introduce kernel modesetting for radeon hardware
drm: Add the TTM GPU memory manager subsystem.
drm: Memory fragmentation from lost alignment blocks
drm/radeon: fix mobility flags on new PCI IDs.
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_agp_backend.c')
-rw-r--r-- | drivers/gpu/drm/ttm/ttm_agp_backend.c | 150 |
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 |