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/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Jerome Glisse.
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
* Alex Deucher
* Jerome Glisse
*/
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon.h"
#include "radeon_reg.h"
/*
* Common GART table functions.
*/
int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
{
void *ptr;
ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
&rdev->gart.table_addr);
if (ptr == NULL) {
return -ENOMEM;
}
#ifdef CONFIG_X86
if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
set_memory_uc((unsigned long)ptr,
rdev->gart.table_size >> PAGE_SHIFT);
}
#endif
rdev->gart.table.ram.ptr = ptr;
memset((void *)rdev->gart.table.ram.ptr, 0, rdev->gart.table_size);
return 0;
}
void radeon_gart_table_ram_free(struct radeon_device *rdev)
{
if (rdev->gart.table.ram.ptr == NULL) {
return;
}
#ifdef CONFIG_X86
if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
set_memory_wb((unsigned long)rdev->gart.table.ram.ptr,
rdev->gart.table_size >> PAGE_SHIFT);
}
#endif
pci_free_consistent(rdev->pdev, rdev->gart.table_size,
(void *)rdev->gart.table.ram.ptr,
rdev->gart.table_addr);
rdev->gart.table.ram.ptr = NULL;
rdev->gart.table_addr = 0;
}
int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
{
int r;
if (rdev->gart.table.vram.robj == NULL) {
r = radeon_bo_create(rdev, NULL, rdev->gart.table_size,
PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
&rdev->gart.table.vram.robj);
if (r) {
return r;
}
}
return 0;
}
int radeon_gart_table_vram_pin(struct radeon_device *rdev)
{
uint64_t gpu_addr;
int r;
r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
if (unlikely(r != 0))
return r;
r = radeon_bo_pin(rdev->gart.table.vram.robj,
RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
if (r) {
radeon_bo_unreserve(rdev->gart.table.vram.robj);
return r;
}
r = radeon_bo_kmap(rdev->gart.table.vram.robj,
(void **)&rdev->gart.table.vram.ptr);
if (r)
radeon_bo_unpin(rdev->gart.table.vram.robj);
radeon_bo_unreserve(rdev->gart.table.vram.robj);
rdev->gart.table_addr = gpu_addr;
return r;
}
void radeon_gart_table_vram_free(struct radeon_device *rdev)
{
int r;
if (rdev->gart.table.vram.robj == NULL) {
return;
}
r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
if (likely(r == 0)) {
radeon_bo_kunmap(rdev->gart.table.vram.robj);
radeon_bo_unpin(rdev->gart.table.vram.robj);
radeon_bo_unreserve(rdev->gart.table.vram.robj);
}
radeon_bo_unref(&rdev->gart.table.vram.robj);
}
/*
* Common gart functions.
*/
void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
int pages)
{
unsigned t;
unsigned p;
int i, j;
u64 page_base;
if (!rdev->gart.ready) {
WARN(1, "trying to unbind memory to unitialized GART !\n");
return;
}
t = offset / RADEON_GPU_PAGE_SIZE;
p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
if (rdev->gart.pages[p]) {
pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
rdev->gart.pages[p] = NULL;
rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
page_base = rdev->gart.pages_addr[p];
for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
radeon_gart_set_page(rdev, t, page_base);
page_base += RADEON_GPU_PAGE_SIZE;
}
}
}
mb();
radeon_gart_tlb_flush(rdev);
}
int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
int pages, struct page **pagelist)
{
unsigned t;
unsigned p;
uint64_t page_base;
int i, j;
if (!rdev->gart.ready) {
WARN(1, "trying to bind memory to unitialized GART !\n");
return -EINVAL;
}
t = offset / RADEON_GPU_PAGE_SIZE;
p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
for (i = 0; i < pages; i++, p++) {
/* we need to support large memory configurations */
/* assume that unbind have already been call on the range */
rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
/* FIXME: failed to map page (return -ENOMEM?) */
radeon_gart_unbind(rdev, offset, pages);
return -ENOMEM;
}
rdev->gart.pages[p] = pagelist[i];
page_base = rdev->gart.pages_addr[p];
for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
radeon_gart_set_page(rdev, t, page_base);
page_base += RADEON_GPU_PAGE_SIZE;
}
}
mb();
radeon_gart_tlb_flush(rdev);
return 0;
}
void radeon_gart_restore(struct radeon_device *rdev)
{
int i, j, t;
u64 page_base;
for (i = 0, t = 0; i < rdev->gart.num_cpu_pages; i++) {
page_base = rdev->gart.pages_addr[i];
for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
radeon_gart_set_page(rdev, t, page_base);
page_base += RADEON_GPU_PAGE_SIZE;
}
}
mb();
radeon_gart_tlb_flush(rdev);
}
int radeon_gart_init(struct radeon_device *rdev)
{
int r, i;
if (rdev->gart.pages) {
return 0;
}
/* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
DRM_ERROR("Page size is smaller than GPU page size!\n");
return -EINVAL;
}
r = radeon_dummy_page_init(rdev);
if (r)
return r;
/* Compute table size */
rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
/* Allocate pages table */
rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
GFP_KERNEL);
if (rdev->gart.pages == NULL) {
radeon_gart_fini(rdev);
return -ENOMEM;
}
rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
rdev->gart.num_cpu_pages, GFP_KERNEL);
if (rdev->gart.pages_addr == NULL) {
radeon_gart_fini(rdev);
return -ENOMEM;
}
/* set GART entry to point to the dummy page by default */
for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
}
return 0;
}
void radeon_gart_fini(struct radeon_device *rdev)
{
if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
/* unbind pages */
radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
}
rdev->gart.ready = false;
kfree(rdev->gart.pages);
kfree(rdev->gart.pages_addr);
rdev->gart.pages = NULL;
rdev->gart.pages_addr = NULL;
}
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