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/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
* Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
*/
/*
* 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>
*
*/
#include "drmP.h"
#define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
#define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */
#define ATI_PCIGART_TABLE_SIZE 32768
int
drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
{
unsigned long pages;
drm_sg_mem_t *entry;
drm_dma_handle_t *dmah;
u32 *pci_gart = NULL, page_base;
int i, j, k;
int pagenum;
size_t bulksize;
entry = dev->sg;
if (entry == 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 */
entry->dmah_gart = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0,
0xfffffffful, 1);
if (entry->dmah_gart == NULL) {
DRM_ERROR("cannot allocate PCI GART table!\n");
return (0);
}
gart_info->addr = (void *)entry->dmah_gart->vaddr;
gart_info->bus_addr = entry->dmah_gart->paddr;
pci_gart = (u32 *)entry->dmah_gart->vaddr;
} else {
/* GART table in framebuffer memory */
pci_gart = gart_info->addr;
}
pages = DRM_MIN(entry->pages, ATI_MAX_PCIGART_PAGES);
bzero(pci_gart, ATI_PCIGART_TABLE_SIZE);
/*CONSTCOND*/
ASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE);
dmah = entry->dmah_sg;
pagenum = 0;
for (i = 0; i < dmah->cookie_num; i++) {
bulksize = dmah->cookie.dmac_size;
for (k = 0; k < bulksize / PAGE_SIZE; k++) {
entry->busaddr[pagenum] =
dmah->cookie.dmac_address + k * PAGE_SIZE;
page_base = (u32) entry->busaddr[pagenum];
if (pagenum ++ == pages)
goto out;
for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
j++) {
if (gart_info->is_pcie)
*pci_gart = (page_base >> 8) | 0xc;
else
*pci_gart = page_base;
pci_gart++;
page_base += ATI_PCIGART_PAGE_SIZE;
}
}
ddi_dma_nextcookie(dmah->dma_hdl, &dmah->cookie);
}
out:
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
(void) ddi_dma_sync(entry->dmah_gart->dma_hdl, 0,
entry->dmah_gart->real_sz, DDI_DMA_SYNC_FORDEV);
}
return (1);
}
/*ARGSUSED*/
extern int
drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
{
drm_dma_handle_t *dmah;
if (dev->sg == NULL) {
DRM_ERROR("no scatter/gather memory!\n");
return (0);
}
dmah = dev->sg->dmah_gart;
dev->sg->dmah_gart = NULL;
if (dmah)
drm_pci_free(dev, dmah);
return (1);
}