1f733a5646
in the radeonkms driver. Note: In PCI mode virtual addresses on the graphics card that map to system RAM are translated to physical addresses by the graphics card itself. In AGP mode address translation is done by the AGP chipset so fictitious addresses appear on the system bus. For the CPU cache management to work correctly when the CPU accesses this memory it needs to use the same fictitious addresses (and let the chipset translate them) instead of using the physical addresses directly. Reviewed by: kib MFC after: 1 month
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/**************************************************************************
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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* Keith Packard.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/drm2/drmP.h>
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#include <dev/drm2/ttm/ttm_module.h>
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#include <dev/drm2/ttm/ttm_bo_driver.h>
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#include <dev/drm2/ttm/ttm_page_alloc.h>
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#ifdef TTM_HAS_AGP
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#include <dev/drm2/ttm/ttm_placement.h>
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struct ttm_agp_backend {
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struct ttm_tt ttm;
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vm_offset_t offset;
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vm_page_t *pages;
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device_t bridge;
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};
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MALLOC_DEFINE(M_TTM_AGP, "ttm_agp", "TTM AGP Backend");
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static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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struct drm_mm_node *node = bo_mem->mm_node;
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int ret;
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unsigned i;
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for (i = 0; i < ttm->num_pages; i++) {
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vm_page_t page = ttm->pages[i];
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if (!page)
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page = ttm->dummy_read_page;
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agp_be->pages[i] = page;
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}
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agp_be->offset = node->start * PAGE_SIZE;
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ret = -agp_bind_pages(agp_be->bridge, agp_be->pages,
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ttm->num_pages << PAGE_SHIFT, agp_be->offset);
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if (ret)
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printf("[TTM] AGP Bind memory failed\n");
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return ret;
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}
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static int ttm_agp_unbind(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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return -agp_unbind_pages(agp_be->bridge, ttm->num_pages << PAGE_SHIFT,
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agp_be->offset);
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}
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static void ttm_agp_destroy(struct ttm_tt *ttm)
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{
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struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
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ttm_tt_fini(ttm);
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free(agp_be->pages, M_TTM_AGP);
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free(agp_be, M_TTM_AGP);
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}
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static struct ttm_backend_func ttm_agp_func = {
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.bind = ttm_agp_bind,
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.unbind = ttm_agp_unbind,
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.destroy = ttm_agp_destroy,
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};
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struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
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device_t bridge,
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unsigned long size, uint32_t page_flags,
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vm_page_t dummy_read_page)
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{
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struct ttm_agp_backend *agp_be;
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agp_be = malloc(sizeof(*agp_be), M_TTM_AGP, M_WAITOK | M_ZERO);
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agp_be->bridge = bridge;
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agp_be->ttm.func = &ttm_agp_func;
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if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
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free(agp_be, M_TTM_AGP);
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return NULL;
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}
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agp_be->offset = 0;
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agp_be->pages = malloc(agp_be->ttm.num_pages * sizeof(*agp_be->pages),
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M_TTM_AGP, M_WAITOK);
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return &agp_be->ttm;
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}
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int ttm_agp_tt_populate(struct ttm_tt *ttm)
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{
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if (ttm->state != tt_unpopulated)
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return 0;
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return ttm_pool_populate(ttm);
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}
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void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
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{
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ttm_pool_unpopulate(ttm);
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}
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#endif
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