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/*-
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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, 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* PRECISION INSIGHT 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:
* Gareth Hughes <gareth@valinux.com>
*
*/
/** @file ati_pcigart.c
* Implementation of ATI's PCIGART, which provides an aperture in card virtual
* address space with addresses remapped to system memory.
*/
#include "drmP.h"
#define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
int drm_ati_pcigart_init(drm_device_t *dev, struct drm_ati_pcigart_info *gart_info)
{
unsigned long pages;
u32 *pci_gart = NULL, page_base;
int i, j;
if (dev->sg == NULL) {
DRM_ERROR( "no scatter/gather memory!\n" );
return 0;
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
/* GART table in system memory */
dev->sg->dmah = drm_pci_alloc(dev, gart_info->table_size, 0,
0xfffffffful);
if (dev->sg->dmah == NULL) {
DRM_ERROR("cannot allocate PCI GART table!\n");
return 0;
}
gart_info->addr = (void *)dev->sg->dmah->vaddr;
gart_info->bus_addr = dev->sg->dmah->busaddr;
pci_gart = (u32 *)dev->sg->dmah->vaddr;
} else {
/* GART table in framebuffer memory */
pci_gart = gart_info->addr;
}
pages = DRM_MIN(dev->sg->pages, gart_info->table_size / sizeof(u32));
bzero(pci_gart, gart_info->table_size);
#if defined(__FreeBSD__)
KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE, ("page size too small"));
#else
KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE);
#endif
for ( i = 0 ; i < pages ; i++ ) {
page_base = (u32) dev->sg->busaddr[i];
for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
switch(gart_info->gart_reg_if) {
case DRM_ATI_GART_IGP:
*pci_gart = cpu_to_le32(page_base | 0xc);
break;
case DRM_ATI_GART_PCIE:
*pci_gart = cpu_to_le32((page_base >> 8) | 0xc);
break;
default:
*pci_gart = cpu_to_le32(page_base);
break;
}
pci_gart++;
page_base += ATI_PCIGART_PAGE_SIZE;
}
}
DRM_MEMORYBARRIER();
return 1;
}
int drm_ati_pcigart_cleanup(drm_device_t *dev, struct drm_ati_pcigart_info *gart_info)
{
if (dev->sg == NULL) {
DRM_ERROR( "no scatter/gather memory!\n" );
return 0;
}
drm_pci_free(dev, dev->sg->dmah);
return 1;
}
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