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/* $OpenBSD: ttm_agp_backend.c,v 1.2 2013/12/08 07:54:06 jsg Exp $ */
/**************************************************************************
*
* 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.
*/
#define pr_fmt(fmt) "[TTM] " fmt
#include <dev/pci/drm/ttm/ttm_module.h>
#include <dev/pci/drm/ttm/ttm_bo_driver.h>
#include <dev/pci/drm/ttm/ttm_page_alloc.h>
#ifdef TTM_HAS_AGP
#include <dev/pci/drm/ttm/ttm_placement.h>
struct ttm_agp_backend {
struct ttm_tt ttm;
int bound;
bus_addr_t addr;
struct drm_agp_head *agp;
};
static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
{
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
struct drm_mm_node *node = bo_mem->mm_node;
struct agp_softc *sc = agp_be->agp->agpdev;
bus_addr_t addr;
// int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
unsigned i;
addr = sc->sc_apaddr + (node->start << PAGE_SHIFT);
for (i = 0; i < ttm->num_pages; i++) {
struct vm_page *page = ttm->pages[i];
if (!page)
page = ttm->dummy_read_page;
sc->sc_methods->bind_page(sc->sc_chipc, addr, VM_PAGE_TO_PHYS(page), 0);
addr += PAGE_SIZE;
}
agp_flush_cache();
sc->sc_methods->flush_tlb(sc->sc_chipc);
agp_be->addr = sc->sc_apaddr + (node->start << PAGE_SHIFT);
agp_be->bound = 1;
return 0;
}
static int ttm_agp_unbind(struct ttm_tt *ttm)
{
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
struct agp_softc *sc = agp_be->agp->agpdev;
bus_addr_t addr;
unsigned i;
if (agp_be->bound) {
addr = agp_be->addr;
for (i = 0; i < ttm->num_pages; i++) {
sc->sc_methods->unbind_page(sc->sc_chipc, addr);
addr += PAGE_SIZE;
}
agp_flush_cache();
sc->sc_methods->flush_tlb(sc->sc_chipc);
agp_be->bound = 0;
}
return 0;
}
static void ttm_agp_destroy(struct ttm_tt *ttm)
{
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
if (agp_be->bound)
ttm_agp_unbind(ttm);
ttm_tt_fini(ttm);
free(agp_be, M_DRM);
}
static struct ttm_backend_func ttm_agp_func = {
.bind = ttm_agp_bind,
.unbind = ttm_agp_unbind,
.destroy = ttm_agp_destroy,
};
struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
struct drm_agp_head *agp,
unsigned long size, uint32_t page_flags,
struct vm_page *dummy_read_page)
{
struct ttm_agp_backend *agp_be;
agp_be = malloc(sizeof(*agp_be), M_DRM, M_WAITOK);
if (!agp_be)
return NULL;
agp_be->bound = 0;
agp_be->agp = agp;
agp_be->ttm.func = &ttm_agp_func;
if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
return NULL;
}
return &agp_be->ttm;
}
EXPORT_SYMBOL(ttm_agp_tt_create);
int ttm_agp_tt_populate(struct ttm_tt *ttm)
{
if (ttm->state != tt_unpopulated)
return 0;
return ttm_pool_populate(ttm);
}
EXPORT_SYMBOL(ttm_agp_tt_populate);
void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
{
ttm_pool_unpopulate(ttm);
}
EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
#endif
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