281 lines
7.0 KiB
C
281 lines
7.0 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright © 2009-2011 VMware, Inc., Palo Alto, CA., USA
|
|
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS 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.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#include "vmwgfx_drv.h"
|
|
#include "drmP.h"
|
|
#include "ttm/ttm_bo_driver.h"
|
|
|
|
#define VMW_PPN_SIZE sizeof(unsigned long)
|
|
|
|
static int vmw_gmr2_bind(struct vmw_private *dev_priv,
|
|
struct page *pages[],
|
|
unsigned long num_pages,
|
|
int gmr_id)
|
|
{
|
|
SVGAFifoCmdDefineGMR2 define_cmd;
|
|
SVGAFifoCmdRemapGMR2 remap_cmd;
|
|
uint32_t define_size = sizeof(define_cmd) + 4;
|
|
uint32_t remap_size = VMW_PPN_SIZE * num_pages + sizeof(remap_cmd) + 4;
|
|
uint32_t *cmd;
|
|
uint32_t *cmd_orig;
|
|
uint32_t i;
|
|
|
|
cmd_orig = cmd = vmw_fifo_reserve(dev_priv, define_size + remap_size);
|
|
if (unlikely(cmd == NULL))
|
|
return -ENOMEM;
|
|
|
|
define_cmd.gmrId = gmr_id;
|
|
define_cmd.numPages = num_pages;
|
|
|
|
remap_cmd.gmrId = gmr_id;
|
|
remap_cmd.flags = (VMW_PPN_SIZE > sizeof(*cmd)) ?
|
|
SVGA_REMAP_GMR2_PPN64 : SVGA_REMAP_GMR2_PPN32;
|
|
remap_cmd.offsetPages = 0;
|
|
remap_cmd.numPages = num_pages;
|
|
|
|
*cmd++ = SVGA_CMD_DEFINE_GMR2;
|
|
memcpy(cmd, &define_cmd, sizeof(define_cmd));
|
|
cmd += sizeof(define_cmd) / sizeof(uint32);
|
|
|
|
*cmd++ = SVGA_CMD_REMAP_GMR2;
|
|
memcpy(cmd, &remap_cmd, sizeof(remap_cmd));
|
|
cmd += sizeof(remap_cmd) / sizeof(uint32);
|
|
|
|
for (i = 0; i < num_pages; ++i) {
|
|
if (VMW_PPN_SIZE > 4)
|
|
*cmd = page_to_pfn(*pages++);
|
|
else
|
|
*((uint64_t *)cmd) = page_to_pfn(*pages++);
|
|
|
|
cmd += VMW_PPN_SIZE / sizeof(*cmd);
|
|
}
|
|
|
|
vmw_fifo_commit(dev_priv, define_size + remap_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vmw_gmr2_unbind(struct vmw_private *dev_priv,
|
|
int gmr_id)
|
|
{
|
|
SVGAFifoCmdDefineGMR2 define_cmd;
|
|
uint32_t define_size = sizeof(define_cmd) + 4;
|
|
uint32_t *cmd;
|
|
|
|
cmd = vmw_fifo_reserve(dev_priv, define_size);
|
|
if (unlikely(cmd == NULL)) {
|
|
DRM_ERROR("GMR2 unbind failed.\n");
|
|
return;
|
|
}
|
|
define_cmd.gmrId = gmr_id;
|
|
define_cmd.numPages = 0;
|
|
|
|
*cmd++ = SVGA_CMD_DEFINE_GMR2;
|
|
memcpy(cmd, &define_cmd, sizeof(define_cmd));
|
|
|
|
vmw_fifo_commit(dev_priv, define_size);
|
|
}
|
|
|
|
/**
|
|
* FIXME: Adjust to the ttm lowmem / highmem storage to minimize
|
|
* the number of used descriptors.
|
|
*/
|
|
|
|
static int vmw_gmr_build_descriptors(struct list_head *desc_pages,
|
|
struct page *pages[],
|
|
unsigned long num_pages)
|
|
{
|
|
struct page *page, *next;
|
|
struct svga_guest_mem_descriptor *page_virtual = NULL;
|
|
struct svga_guest_mem_descriptor *desc_virtual = NULL;
|
|
unsigned int desc_per_page;
|
|
unsigned long prev_pfn;
|
|
unsigned long pfn;
|
|
int ret;
|
|
|
|
desc_per_page = PAGE_SIZE /
|
|
sizeof(struct svga_guest_mem_descriptor) - 1;
|
|
|
|
while (likely(num_pages != 0)) {
|
|
page = alloc_page(__GFP_HIGHMEM);
|
|
if (unlikely(page == NULL)) {
|
|
ret = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
|
|
list_add_tail(&page->lru, desc_pages);
|
|
|
|
/*
|
|
* Point previous page terminating descriptor to this
|
|
* page before unmapping it.
|
|
*/
|
|
|
|
if (likely(page_virtual != NULL)) {
|
|
desc_virtual->ppn = page_to_pfn(page);
|
|
kunmap_atomic(page_virtual);
|
|
}
|
|
|
|
page_virtual = kmap_atomic(page);
|
|
desc_virtual = page_virtual - 1;
|
|
prev_pfn = ~(0UL);
|
|
|
|
while (likely(num_pages != 0)) {
|
|
pfn = page_to_pfn(*pages);
|
|
|
|
if (pfn != prev_pfn + 1) {
|
|
|
|
if (desc_virtual - page_virtual ==
|
|
desc_per_page - 1)
|
|
break;
|
|
|
|
(++desc_virtual)->ppn = cpu_to_le32(pfn);
|
|
desc_virtual->num_pages = cpu_to_le32(1);
|
|
} else {
|
|
uint32_t tmp =
|
|
le32_to_cpu(desc_virtual->num_pages);
|
|
desc_virtual->num_pages = cpu_to_le32(tmp + 1);
|
|
}
|
|
prev_pfn = pfn;
|
|
--num_pages;
|
|
++pages;
|
|
}
|
|
|
|
(++desc_virtual)->ppn = cpu_to_le32(0);
|
|
desc_virtual->num_pages = cpu_to_le32(0);
|
|
}
|
|
|
|
if (likely(page_virtual != NULL))
|
|
kunmap_atomic(page_virtual);
|
|
|
|
return 0;
|
|
out_err:
|
|
list_for_each_entry_safe(page, next, desc_pages, lru) {
|
|
list_del_init(&page->lru);
|
|
__free_page(page);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static inline void vmw_gmr_free_descriptors(struct list_head *desc_pages)
|
|
{
|
|
struct page *page, *next;
|
|
|
|
list_for_each_entry_safe(page, next, desc_pages, lru) {
|
|
list_del_init(&page->lru);
|
|
__free_page(page);
|
|
}
|
|
}
|
|
|
|
static void vmw_gmr_fire_descriptors(struct vmw_private *dev_priv,
|
|
int gmr_id, struct list_head *desc_pages)
|
|
{
|
|
struct page *page;
|
|
|
|
if (unlikely(list_empty(desc_pages)))
|
|
return;
|
|
|
|
page = list_entry(desc_pages->next, struct page, lru);
|
|
|
|
mutex_lock(&dev_priv->hw_mutex);
|
|
|
|
vmw_write(dev_priv, SVGA_REG_GMR_ID, gmr_id);
|
|
wmb();
|
|
vmw_write(dev_priv, SVGA_REG_GMR_DESCRIPTOR, page_to_pfn(page));
|
|
mb();
|
|
|
|
mutex_unlock(&dev_priv->hw_mutex);
|
|
|
|
}
|
|
|
|
/**
|
|
* FIXME: Adjust to the ttm lowmem / highmem storage to minimize
|
|
* the number of used descriptors.
|
|
*/
|
|
|
|
static unsigned long vmw_gmr_count_descriptors(struct page *pages[],
|
|
unsigned long num_pages)
|
|
{
|
|
unsigned long prev_pfn = ~(0UL);
|
|
unsigned long pfn;
|
|
unsigned long descriptors = 0;
|
|
|
|
while (num_pages--) {
|
|
pfn = page_to_pfn(*pages++);
|
|
if (prev_pfn + 1 != pfn)
|
|
++descriptors;
|
|
prev_pfn = pfn;
|
|
}
|
|
|
|
return descriptors;
|
|
}
|
|
|
|
int vmw_gmr_bind(struct vmw_private *dev_priv,
|
|
struct page *pages[],
|
|
unsigned long num_pages,
|
|
int gmr_id)
|
|
{
|
|
struct list_head desc_pages;
|
|
int ret;
|
|
|
|
if (likely(dev_priv->capabilities & SVGA_CAP_GMR2))
|
|
return vmw_gmr2_bind(dev_priv, pages, num_pages, gmr_id);
|
|
|
|
if (unlikely(!(dev_priv->capabilities & SVGA_CAP_GMR)))
|
|
return -EINVAL;
|
|
|
|
if (vmw_gmr_count_descriptors(pages, num_pages) >
|
|
dev_priv->max_gmr_descriptors)
|
|
return -EINVAL;
|
|
|
|
INIT_LIST_HEAD(&desc_pages);
|
|
|
|
ret = vmw_gmr_build_descriptors(&desc_pages, pages, num_pages);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
vmw_gmr_fire_descriptors(dev_priv, gmr_id, &desc_pages);
|
|
vmw_gmr_free_descriptors(&desc_pages);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void vmw_gmr_unbind(struct vmw_private *dev_priv, int gmr_id)
|
|
{
|
|
if (likely(dev_priv->capabilities & SVGA_CAP_GMR2)) {
|
|
vmw_gmr2_unbind(dev_priv, gmr_id);
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&dev_priv->hw_mutex);
|
|
vmw_write(dev_priv, SVGA_REG_GMR_ID, gmr_id);
|
|
wmb();
|
|
vmw_write(dev_priv, SVGA_REG_GMR_DESCRIPTOR, 0);
|
|
mb();
|
|
mutex_unlock(&dev_priv->hw_mutex);
|
|
}
|