vmwgfx: Implement GMR2
Guest Memory Regions 2 is a way to bind pages to the GPU, but using the FIFO instead of an io-submitted descriptor chain. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecantz <jakob@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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1 changed files with 80 additions and 1 deletions
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@ -1,6 +1,6 @@
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/**************************************************************************
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*
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* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
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* Copyright © 2009-2011 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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@ -29,6 +29,77 @@
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#include "drmP.h"
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#include "ttm/ttm_bo_driver.h"
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#define VMW_PPN_SIZE sizeof(unsigned long)
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static int vmw_gmr2_bind(struct vmw_private *dev_priv,
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struct page *pages[],
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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 define_size = sizeof(define_cmd) + 4;
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uint32_t remap_size = VMW_PPN_SIZE * num_pages + sizeof(remap_cmd) + 4;
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uint32_t *cmd;
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uint32_t *cmd_orig;
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uint32_t i;
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cmd_orig = cmd = vmw_fifo_reserve(dev_priv, define_size + remap_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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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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remap_cmd.offsetPages = 0;
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remap_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(uint32);
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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(uint32);
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for (i = 0; i < num_pages; ++i) {
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if (VMW_PPN_SIZE > 4)
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*cmd = page_to_pfn(*pages++);
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else
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*((uint64_t *)cmd) = page_to_pfn(*pages++);
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cmd += VMW_PPN_SIZE / sizeof(*cmd);
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}
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vmw_fifo_commit(dev_priv, define_size + remap_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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DRM_ERROR("GMR2 unbind failed.\n");
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return;
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}
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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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/**
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* FIXME: Adjust to the ttm lowmem / highmem storage to minimize
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* the number of used descriptors.
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@ -170,6 +241,9 @@ int vmw_gmr_bind(struct vmw_private *dev_priv,
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struct list_head desc_pages;
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int ret;
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if (likely(dev_priv->capabilities & SVGA_CAP_GMR2))
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return vmw_gmr2_bind(dev_priv, pages, num_pages, gmr_id);
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if (unlikely(!(dev_priv->capabilities & SVGA_CAP_GMR)))
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return -EINVAL;
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@ -192,6 +266,11 @@ int vmw_gmr_bind(struct vmw_private *dev_priv,
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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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return;
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}
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mutex_lock(&dev_priv->hw_mutex);
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vmw_write(dev_priv, SVGA_REG_GMR_ID, gmr_id);
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wmb();
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