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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 */
#define ATI_PCIGART_PAGE_MASK (~(ATI_PCIGART_PAGE_SIZE-1))
#define ATI_PCIE_WRITE 0x4
#define ATI_PCIE_READ 0x8
int drm_ati_alloc_pcigart_table(struct drm_device *,
struct drm_ati_pcigart_info *);
void drm_ati_free_pcigart_table(struct drm_device *,
struct drm_ati_pcigart_info *);
int
drm_ati_alloc_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
dev->sg->dmah = drm_pci_alloc(dev->pa.pa_dmat, gart_info->table_size,
PAGE_SIZE, gart_info->table_mask);
if (dev->sg->dmah == NULL)
return ENOMEM;
return 0;
}
void
drm_ati_free_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
drm_pci_free(dev->pa.pa_dmat, dev->sg->dmah);
dev->sg->dmah = NULL;
}
int
drm_ati_pcigart_cleanup(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
/* we need to support large memory configurations */
if (dev->sg == NULL) {
DRM_ERROR("no scatter/gather memory!\n");
return 0;
}
if (gart_info->bus_addr) {
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
gart_info->bus_addr = 0;
if (dev->sg->dmah)
drm_ati_free_pcigart_table(dev, gart_info);
}
}
return 1;
}
int
drm_ati_pcigart_init(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
void *address = NULL;
unsigned long pages;
u32 *pci_gart, page_base;
dma_addr_t bus_address = 0;
int i, j, ret = 0;
int max_pages;
dma_addr_t entry_addr;
/* we need to support large memory configurations */
if (dev->sg == NULL) {
DRM_ERROR("no scatter/gather memory!\n");
goto done;
}
if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
ret = drm_ati_alloc_pcigart_table(dev, gart_info);
if (ret) {
DRM_ERROR("cannot allocate PCI GART page!\n");
goto done;
}
address = (void *)dev->sg->dmah->vaddr;
bus_address = dev->sg->dmah->busaddr;
} else {
address = gart_info->addr;
bus_address = gart_info->bus_addr;
DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n",
(unsigned int)bus_address, (unsigned long)address);
}
pci_gart = (u32 *) address;
max_pages = (gart_info->table_size / sizeof(u32));
pages = (dev->sg->pages <= max_pages)
? dev->sg->pages : max_pages;
memset(pci_gart, 0, max_pages * sizeof(u32));
#ifdef __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++) {
entry_addr = dev->sg->busaddr[i];
for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
page_base = (u32) entry_addr & ATI_PCIGART_PAGE_MASK;
switch(gart_info->gart_reg_if) {
case DRM_ATI_GART_IGP:
page_base |= (upper_32_bits(entry_addr) & 0xff) << 4;
page_base |= 0xc;
break;
case DRM_ATI_GART_PCIE:
page_base >>= 8;
page_base |= (upper_32_bits(entry_addr) & 0xff) << 24;
page_base |= ATI_PCIE_READ | ATI_PCIE_WRITE;
break;
default:
case DRM_ATI_GART_PCI:
break;
}
*pci_gart = cpu_to_le32(page_base);
pci_gart++;
entry_addr += ATI_PCIGART_PAGE_SIZE;
}
}
DRM_MEMORYBARRIER();
ret = 1;
done:
gart_info->addr = address;
gart_info->bus_addr = bus_address;
return ret;
}
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