151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include <drm/ttm/ttm_bo_driver.h>
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#include "vmwgfx_drv.h"
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#define VMW_PPN_SIZE (sizeof(unsigned long))
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/* A future safe maximum remap size. */
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#define VMW_PPN_PER_REMAP ((31 * 1024) / VMW_PPN_SIZE)
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#define DMA_ADDR_INVALID ((dma_addr_t) 0)
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#define DMA_PAGE_INVALID 0UL
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static int vmw_gmr2_bind(struct vmw_private *dev_priv,
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struct vmw_piter *iter,
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unsigned long num_pages,
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int gmr_id)
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{
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SVGAFifoCmdDefineGMR2 define_cmd;
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SVGAFifoCmdRemapGMR2 remap_cmd;
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uint32_t *cmd;
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uint32_t *cmd_orig;
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uint32_t define_size = sizeof(define_cmd) + sizeof(*cmd);
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uint32_t remap_num = num_pages / VMW_PPN_PER_REMAP + ((num_pages % VMW_PPN_PER_REMAP) > 0);
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uint32_t remap_size = VMW_PPN_SIZE * num_pages + (sizeof(remap_cmd) + sizeof(*cmd)) * remap_num;
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uint32_t remap_pos = 0;
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uint32_t cmd_size = define_size + remap_size;
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uint32_t i;
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cmd_orig = cmd = VMW_FIFO_RESERVE(dev_priv, cmd_size);
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if (unlikely(cmd == NULL))
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return -ENOMEM;
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define_cmd.gmrId = gmr_id;
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define_cmd.numPages = num_pages;
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*cmd++ = SVGA_CMD_DEFINE_GMR2;
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memcpy(cmd, &define_cmd, sizeof(define_cmd));
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cmd += sizeof(define_cmd) / sizeof(*cmd);
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/*
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* Need to split the command if there are too many
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* pages that goes into the gmr.
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*/
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remap_cmd.gmrId = gmr_id;
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remap_cmd.flags = (VMW_PPN_SIZE > sizeof(*cmd)) ?
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SVGA_REMAP_GMR2_PPN64 : SVGA_REMAP_GMR2_PPN32;
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while (num_pages > 0) {
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unsigned long nr = min(num_pages, (unsigned long)VMW_PPN_PER_REMAP);
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remap_cmd.offsetPages = remap_pos;
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remap_cmd.numPages = nr;
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*cmd++ = SVGA_CMD_REMAP_GMR2;
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memcpy(cmd, &remap_cmd, sizeof(remap_cmd));
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cmd += sizeof(remap_cmd) / sizeof(*cmd);
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for (i = 0; i < nr; ++i) {
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if (VMW_PPN_SIZE <= 4)
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*cmd = vmw_piter_dma_addr(iter) >> PAGE_SHIFT;
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else
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*((uint64_t *)cmd) = vmw_piter_dma_addr(iter) >>
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PAGE_SHIFT;
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cmd += VMW_PPN_SIZE / sizeof(*cmd);
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vmw_piter_next(iter);
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}
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num_pages -= nr;
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remap_pos += nr;
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}
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BUG_ON(cmd != cmd_orig + cmd_size / sizeof(*cmd));
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vmw_fifo_commit(dev_priv, cmd_size);
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return 0;
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}
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static void vmw_gmr2_unbind(struct vmw_private *dev_priv,
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int gmr_id)
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{
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SVGAFifoCmdDefineGMR2 define_cmd;
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uint32_t define_size = sizeof(define_cmd) + 4;
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uint32_t *cmd;
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cmd = VMW_FIFO_RESERVE(dev_priv, define_size);
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if (unlikely(cmd == NULL))
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return;
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define_cmd.gmrId = gmr_id;
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define_cmd.numPages = 0;
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*cmd++ = SVGA_CMD_DEFINE_GMR2;
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memcpy(cmd, &define_cmd, sizeof(define_cmd));
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vmw_fifo_commit(dev_priv, define_size);
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}
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int vmw_gmr_bind(struct vmw_private *dev_priv,
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const struct vmw_sg_table *vsgt,
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unsigned long num_pages,
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int gmr_id)
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{
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struct vmw_piter data_iter;
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vmw_piter_start(&data_iter, vsgt, 0);
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if (unlikely(!vmw_piter_next(&data_iter)))
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return 0;
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if (unlikely(!(dev_priv->capabilities & SVGA_CAP_GMR2)))
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return -EINVAL;
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return vmw_gmr2_bind(dev_priv, &data_iter, num_pages, gmr_id);
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}
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void vmw_gmr_unbind(struct vmw_private *dev_priv, int gmr_id)
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{
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if (likely(dev_priv->capabilities & SVGA_CAP_GMR2))
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vmw_gmr2_unbind(dev_priv, gmr_id);
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}
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