![David Howells](/assets/img/avatar_default.png)
Convert #include "..." to #include <path/...> in drivers/gpu/. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Dave Airlie <airlied@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
281 lines
7 KiB
C
281 lines
7 KiB
C
/**************************************************************************
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*
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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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* 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 "vmwgfx_drv.h"
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#include <drm/drmP.h>
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#include <drm/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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*/
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static int vmw_gmr_build_descriptors(struct list_head *desc_pages,
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struct page *pages[],
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unsigned long num_pages)
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{
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struct page *page, *next;
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struct svga_guest_mem_descriptor *page_virtual = NULL;
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struct svga_guest_mem_descriptor *desc_virtual = NULL;
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unsigned int desc_per_page;
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unsigned long prev_pfn;
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unsigned long pfn;
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int ret;
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desc_per_page = PAGE_SIZE /
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sizeof(struct svga_guest_mem_descriptor) - 1;
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while (likely(num_pages != 0)) {
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page = alloc_page(__GFP_HIGHMEM);
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if (unlikely(page == NULL)) {
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ret = -ENOMEM;
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goto out_err;
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}
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list_add_tail(&page->lru, desc_pages);
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/*
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* Point previous page terminating descriptor to this
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* page before unmapping it.
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*/
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if (likely(page_virtual != NULL)) {
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desc_virtual->ppn = page_to_pfn(page);
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kunmap_atomic(page_virtual);
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}
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page_virtual = kmap_atomic(page);
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desc_virtual = page_virtual - 1;
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prev_pfn = ~(0UL);
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while (likely(num_pages != 0)) {
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pfn = page_to_pfn(*pages);
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if (pfn != prev_pfn + 1) {
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if (desc_virtual - page_virtual ==
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desc_per_page - 1)
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break;
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(++desc_virtual)->ppn = cpu_to_le32(pfn);
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desc_virtual->num_pages = cpu_to_le32(1);
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} else {
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uint32_t tmp =
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le32_to_cpu(desc_virtual->num_pages);
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desc_virtual->num_pages = cpu_to_le32(tmp + 1);
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}
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prev_pfn = pfn;
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--num_pages;
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++pages;
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}
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(++desc_virtual)->ppn = cpu_to_le32(0);
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desc_virtual->num_pages = cpu_to_le32(0);
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}
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if (likely(page_virtual != NULL))
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kunmap_atomic(page_virtual);
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return 0;
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out_err:
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list_for_each_entry_safe(page, next, desc_pages, lru) {
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list_del_init(&page->lru);
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__free_page(page);
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}
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return ret;
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}
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static inline void vmw_gmr_free_descriptors(struct list_head *desc_pages)
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{
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struct page *page, *next;
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list_for_each_entry_safe(page, next, desc_pages, lru) {
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list_del_init(&page->lru);
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__free_page(page);
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}
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}
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static void vmw_gmr_fire_descriptors(struct vmw_private *dev_priv,
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int gmr_id, struct list_head *desc_pages)
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{
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struct page *page;
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if (unlikely(list_empty(desc_pages)))
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return;
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page = list_entry(desc_pages->next, struct page, lru);
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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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vmw_write(dev_priv, SVGA_REG_GMR_DESCRIPTOR, page_to_pfn(page));
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mb();
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mutex_unlock(&dev_priv->hw_mutex);
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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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*/
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static unsigned long vmw_gmr_count_descriptors(struct page *pages[],
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unsigned long num_pages)
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{
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unsigned long prev_pfn = ~(0UL);
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unsigned long pfn;
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unsigned long descriptors = 0;
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while (num_pages--) {
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pfn = page_to_pfn(*pages++);
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if (prev_pfn + 1 != pfn)
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++descriptors;
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prev_pfn = pfn;
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}
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return descriptors;
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}
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int vmw_gmr_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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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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if (vmw_gmr_count_descriptors(pages, num_pages) >
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dev_priv->max_gmr_descriptors)
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return -EINVAL;
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INIT_LIST_HEAD(&desc_pages);
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ret = vmw_gmr_build_descriptors(&desc_pages, pages, num_pages);
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if (unlikely(ret != 0))
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return ret;
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vmw_gmr_fire_descriptors(dev_priv, gmr_id, &desc_pages);
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vmw_gmr_free_descriptors(&desc_pages);
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return 0;
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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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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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vmw_write(dev_priv, SVGA_REG_GMR_DESCRIPTOR, 0);
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mb();
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mutex_unlock(&dev_priv->hw_mutex);
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}
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