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/**************************************************************************
* Copyright (c) 2007, Intel Corporation.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
* develop this driver.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thomas-at-tungstengraphics.com>
*/
#include <drm/drmP.h>
#include "psb_drv.h"
static inline uint32_t psb_gtt_mask_pte(uint32_t pfn, int type)
{
uint32_t mask = PSB_PTE_VALID;
if (type & PSB_MMU_CACHED_MEMORY)
mask |= PSB_PTE_CACHED;
if (type & PSB_MMU_RO_MEMORY)
mask |= PSB_PTE_RO;
if (type & PSB_MMU_WO_MEMORY)
mask |= PSB_PTE_WO;
return (pfn << PAGE_SHIFT) | mask;
}
struct psb_gtt *psb_gtt_alloc(struct drm_device *dev)
{
struct psb_gtt *tmp = drm_calloc(1, sizeof(*tmp), DRM_MEM_DRIVER);
if (!tmp)
return NULL;
init_rwsem(&tmp->sem);
tmp->dev = dev;
return tmp;
}
void psb_gtt_takedown(struct psb_gtt *pg, int free)
{
struct drm_psb_private *dev_priv = pg->dev->dev_private;
if (!pg)
return;
if (pg->gtt_map) {
iounmap(pg->gtt_map);
pg->gtt_map = NULL;
}
if (pg->initialized) {
pci_write_config_word(pg->dev->pdev, PSB_GMCH_CTRL,
pg->gmch_ctrl);
PSB_WVDC32(pg->pge_ctl, PSB_PGETBL_CTL);
(void) PSB_RVDC32(PSB_PGETBL_CTL);
}
if (free)
drm_free(pg, sizeof(*pg), DRM_MEM_DRIVER);
}
int psb_gtt_init(struct psb_gtt *pg, int resume)
{
struct drm_device *dev = pg->dev;
struct drm_psb_private *dev_priv = dev->dev_private;
unsigned gtt_pages;
unsigned long stolen_size, vram_stolen_size, ci_stolen_size;
unsigned i, num_pages;
unsigned pfn_base;
int ret = 0;
uint32_t pte;
pci_read_config_word(dev->pdev, PSB_GMCH_CTRL, &pg->gmch_ctrl);
pci_write_config_word(dev->pdev, PSB_GMCH_CTRL,
pg->gmch_ctrl | _PSB_GMCH_ENABLED);
pg->pge_ctl = PSB_RVDC32(PSB_PGETBL_CTL);
PSB_WVDC32(pg->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
(void) PSB_RVDC32(PSB_PGETBL_CTL);
pg->initialized = 1;
pg->gtt_phys_start = pg->pge_ctl & PAGE_MASK;
pg->gatt_start = pci_resource_start(dev->pdev, PSB_GATT_RESOURCE);
pg->gtt_start = pci_resource_start(dev->pdev, PSB_GTT_RESOURCE);
gtt_pages =
pci_resource_len(dev->pdev, PSB_GTT_RESOURCE) >> PAGE_SHIFT;
pg->gatt_pages = pci_resource_len(dev->pdev, PSB_GATT_RESOURCE)
>> PAGE_SHIFT;
pci_read_config_dword(dev->pdev, PSB_BSM, &pg->stolen_base);
vram_stolen_size = pg->gtt_phys_start - pg->stolen_base - PAGE_SIZE;
ci_stolen_size = dev_priv->ci_region_size;
/* add CI & RAR share buffer space to stolen_size */
/* stolen_size = vram_stolen_size + ci_stolen_size; */
stolen_size = vram_stolen_size;
PSB_DEBUG_INIT("GTT phys start: 0x%08x.\n", pg->gtt_phys_start);
PSB_DEBUG_INIT("GTT start: 0x%08x.\n", pg->gtt_start);
PSB_DEBUG_INIT("GATT start: 0x%08x.\n", pg->gatt_start);
PSB_DEBUG_INIT("GTT pages: %u\n", gtt_pages);
PSB_DEBUG_INIT("Stolen size: %lu kiB\n", stolen_size / 1024);
if (resume && (gtt_pages != pg->gtt_pages) &&
(stolen_size != pg->stolen_size)) {
DRM_ERROR("GTT resume error.\n");
ret = -EINVAL;
goto out_err;
}
pg->gtt_pages = gtt_pages;
pg->stolen_size = stolen_size;
pg->vram_stolen_size = vram_stolen_size;
pg->ci_stolen_size = ci_stolen_size;
pg->gtt_map =
ioremap_nocache(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
if (!pg->gtt_map) {
DRM_ERROR("Failure to map gtt.\n");
ret = -ENOMEM;
goto out_err;
}
/*
* insert vram stolen pages.
*/
pfn_base = pg->stolen_base >> PAGE_SHIFT;
num_pages = vram_stolen_size >> PAGE_SHIFT;
PSB_DEBUG_INIT("Set up %d stolen pages starting at 0x%08x\n",
num_pages, pfn_base);
for (i = 0; i < num_pages; ++i) {
pte = psb_gtt_mask_pte(pfn_base + i, 0);
iowrite32(pte, pg->gtt_map + i);
}
#if 0
/*
* insert CI stolen pages
*/
pfn_base = dev_priv->ci_region_start >> PAGE_SHIFT;
num_pages = ci_stolen_size >> PAGE_SHIFT;
PSB_DEBUG_INIT("Set up %d stolen pages starting at 0x%08x\n",
num_pages, pfn_base);
for (; i < num_pages; ++i) {
pte = psb_gtt_mask_pte(pfn_base + i, 0);
iowrite32(pte, pg->gtt_map + i);
}
#endif
/*
* Init rest of gtt.
*/
pfn_base = page_to_pfn(dev_priv->scratch_page);
pte = psb_gtt_mask_pte(pfn_base, 0);
PSB_DEBUG_INIT("Initializing the rest of a total "
"of %d gtt pages.\n", pg->gatt_pages);
for (; i < pg->gatt_pages; ++i)
iowrite32(pte, pg->gtt_map + i);
(void) ioread32(pg->gtt_map + i - 1);
return 0;
out_err:
psb_gtt_takedown(pg, 0);
return ret;
}
int psb_gtt_insert_pages(struct psb_gtt *pg, struct page **pages,
unsigned offset_pages, unsigned num_pages,
unsigned desired_tile_stride,
unsigned hw_tile_stride, int type)
{
unsigned rows = 1;
unsigned add;
unsigned row_add;
unsigned i;
unsigned j;
uint32_t *cur_page = NULL;
uint32_t pte;
if (hw_tile_stride)
rows = num_pages / desired_tile_stride;
else
desired_tile_stride = num_pages;
add = desired_tile_stride;
row_add = hw_tile_stride;
down_read(&pg->sem);
for (i = 0; i < rows; ++i) {
cur_page = pg->gtt_map + offset_pages;
for (j = 0; j < desired_tile_stride; ++j) {
pte =
psb_gtt_mask_pte(page_to_pfn(*pages++), type);
iowrite32(pte, cur_page++);
}
offset_pages += add;
}
(void) ioread32(cur_page - 1);
up_read(&pg->sem);
return 0;
}
int psb_gtt_remove_pages(struct psb_gtt *pg, unsigned offset_pages,
unsigned num_pages, unsigned desired_tile_stride,
unsigned hw_tile_stride)
{
struct drm_psb_private *dev_priv = pg->dev->dev_private;
unsigned rows = 1;
unsigned add;
unsigned row_add;
unsigned i;
unsigned j;
uint32_t *cur_page = NULL;
unsigned pfn_base = page_to_pfn(dev_priv->scratch_page);
uint32_t pte = psb_gtt_mask_pte(pfn_base, 0);
if (hw_tile_stride)
rows = num_pages / desired_tile_stride;
else
desired_tile_stride = num_pages;
add = desired_tile_stride;
row_add = hw_tile_stride;
down_read(&pg->sem);
for (i = 0; i < rows; ++i) {
cur_page = pg->gtt_map + offset_pages;
for (j = 0; j < desired_tile_stride; ++j)
iowrite32(pte, cur_page++);
offset_pages += add;
}
(void) ioread32(cur_page - 1);
up_read(&pg->sem);
return 0;
}
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