diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c new file mode 100644 index 000000000..61d8d8031 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c @@ -0,0 +1,151 @@ +/************************************************************************** + * + * 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 <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) +#define DMA_ADDR_INVALID ((dma_addr_t) 0) +#define DMA_PAGE_INVALID 0UL + +static int vmw_gmr2_bind(struct vmw_private *dev_priv, + struct vmw_piter *iter, + 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 = vmw_piter_dma_addr(iter) >> PAGE_SHIFT; + else + *((uint64_t *)cmd) = vmw_piter_dma_addr(iter) >> + PAGE_SHIFT; + + cmd += VMW_PPN_SIZE / sizeof(*cmd); + vmw_piter_next(iter); + } + + 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, + const struct vmw_sg_table *vsgt, + unsigned long num_pages, + int gmr_id) +{ + struct vmw_piter data_iter; + + vmw_piter_start(&data_iter, vsgt, 0); + + if (unlikely(!vmw_piter_next(&data_iter))) + return 0; + + if (unlikely(!(dev_priv->capabilities & SVGA_CAP_GMR2))) + return -EINVAL; + + return vmw_gmr2_bind(dev_priv, &data_iter, num_pages, gmr_id); +} + + +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); +} |