kolibrios/drivers/video/drm/vmwgfx/vmwgfx_gmr.c
Sergey Semyonov (Serge) 737ef03421 VMware SVGA II: 3.12-rc6
git-svn-id: svn://kolibrios.org@4111 a494cfbc-eb01-0410-851d-a64ba20cac60
2013-10-27 04:53:36 +00:00

157 lines
4.5 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.
*
**************************************************************************/
#define mb() asm volatile("mfence" : : : "memory")
#define rmb() asm volatile("lfence" : : : "memory")
#define wmb() asm volatile("sfence" : : : "memory")
#include "vmwgfx_drv.h"
#include <drm/drmP.h>
#include <drm/ttm/ttm_bo_driver.h>
#define VMW_PPN_SIZE (sizeof(unsigned long))
/* A future safe maximum remap size. */
#define VMW_PPN_PER_REMAP ((31 * 1024) / VMW_PPN_SIZE)
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 *cmd;
uint32_t *cmd_orig;
uint32_t define_size = sizeof(define_cmd) + sizeof(*cmd);
uint32_t remap_num = num_pages / VMW_PPN_PER_REMAP + ((num_pages % VMW_PPN_PER_REMAP) > 0);
uint32_t remap_size = VMW_PPN_SIZE * num_pages + (sizeof(remap_cmd) + sizeof(*cmd)) * remap_num;
uint32_t remap_pos = 0;
uint32_t cmd_size = define_size + remap_size;
uint32_t i;
cmd_orig = cmd = vmw_fifo_reserve(dev_priv, cmd_size);
if (unlikely(cmd == NULL))
return -ENOMEM;
define_cmd.gmrId = gmr_id;
define_cmd.numPages = num_pages;
*cmd++ = SVGA_CMD_DEFINE_GMR2;
memcpy(cmd, &define_cmd, sizeof(define_cmd));
cmd += sizeof(define_cmd) / sizeof(*cmd);
/*
* Need to split the command if there are too many
* pages that goes into the gmr.
*/
remap_cmd.gmrId = gmr_id;
remap_cmd.flags = (VMW_PPN_SIZE > sizeof(*cmd)) ?
SVGA_REMAP_GMR2_PPN64 : SVGA_REMAP_GMR2_PPN32;
while (num_pages > 0) {
unsigned long nr = min(num_pages, (unsigned long)VMW_PPN_PER_REMAP);
remap_cmd.offsetPages = remap_pos;
remap_cmd.numPages = nr;
*cmd++ = SVGA_CMD_REMAP_GMR2;
memcpy(cmd, &remap_cmd, sizeof(remap_cmd));
cmd += sizeof(remap_cmd) / sizeof(*cmd);
for (i = 0; i < nr; ++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);
}
num_pages -= nr;
remap_pos += nr;
}
BUG_ON(cmd != cmd_orig + cmd_size / sizeof(*cmd));
vmw_fifo_commit(dev_priv, cmd_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);
}
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);
printf("%s epic fail\n",__FUNCTION__);
return -EINVAL;
}
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);
}