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![Ankitprasad Sharma](/assets/img/avatar_default.png)
i915_gem_object_get_dma_address function is used to retrieve the dma address of a particular page so as to map it in a given GTT entry for CPU access. This function would be used for stolen backed objects also for tasks like pwrite, clearing of the pages etc. So the obj->get_page.sg needs to be initialized for the stolen objects also. Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1450765253-32104-2-git-send-email-ankitprasad.r.sharma@intel.com Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
706 lines
19 KiB
C
706 lines
19 KiB
C
/*
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* Copyright © 2008-2012 Intel Corporation
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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 NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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* Chris Wilson <chris@chris-wilson.co.uk>
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*
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*/
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#include <drm/drmP.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#define KB(x) ((x) * 1024)
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#define MB(x) (KB(x) * 1024)
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/*
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* The BIOS typically reserves some of the system's memory for the exclusive
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* use of the integrated graphics. This memory is no longer available for
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* use by the OS and so the user finds that his system has less memory
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* available than he put in. We refer to this memory as stolen.
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*
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* The BIOS will allocate its framebuffer from the stolen memory. Our
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* goal is try to reuse that object for our own fbcon which must always
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* be available for panics. Anything else we can reuse the stolen memory
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* for is a boon.
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*/
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int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
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struct drm_mm_node *node, u64 size,
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unsigned alignment, u64 start, u64 end)
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{
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int ret;
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if (!drm_mm_initialized(&dev_priv->mm.stolen))
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return -ENODEV;
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/* See the comment at the drm_mm_init() call for more about this check.
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* WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */
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if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096)
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start = 4096;
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mutex_lock(&dev_priv->mm.stolen_lock);
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ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size,
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alignment, start, end,
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DRM_MM_SEARCH_DEFAULT);
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mutex_unlock(&dev_priv->mm.stolen_lock);
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return ret;
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}
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int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,
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struct drm_mm_node *node, u64 size,
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unsigned alignment)
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{
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return i915_gem_stolen_insert_node_in_range(dev_priv, node, size,
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alignment, 0,
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dev_priv->gtt.stolen_usable_size);
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}
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void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
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struct drm_mm_node *node)
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{
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mutex_lock(&dev_priv->mm.stolen_lock);
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drm_mm_remove_node(node);
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mutex_unlock(&dev_priv->mm.stolen_lock);
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}
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static unsigned long i915_stolen_to_physical(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct resource *r;
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u32 base;
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/* Almost universally we can find the Graphics Base of Stolen Memory
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* at offset 0x5c in the igfx configuration space. On a few (desktop)
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* machines this is also mirrored in the bridge device at different
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* locations, or in the MCHBAR.
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*
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* On 865 we just check the TOUD register.
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*
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* On 830/845/85x the stolen memory base isn't available in any
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* register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
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*
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*/
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base = 0;
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if (INTEL_INFO(dev)->gen >= 3) {
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/* Read Graphics Base of Stolen Memory directly */
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pci_read_config_dword(dev->pdev, 0x5c, &base);
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base &= ~((1<<20) - 1);
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} else if (IS_I865G(dev)) {
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u16 toud = 0;
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/*
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* FIXME is the graphics stolen memory region
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* always at TOUD? Ie. is it always the last
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* one to be allocated by the BIOS?
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*/
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pci_bus_read_config_word(dev->pdev->bus, PCI_DEVFN(0, 0),
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I865_TOUD, &toud);
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base = toud << 16;
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} else if (IS_I85X(dev)) {
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u32 tseg_size = 0;
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u32 tom;
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u8 tmp;
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
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I85X_ESMRAMC, &tmp);
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if (tmp & TSEG_ENABLE)
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tseg_size = MB(1);
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 1),
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I85X_DRB3, &tmp);
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tom = tmp * MB(32);
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base = tom - tseg_size - dev_priv->gtt.stolen_size;
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} else if (IS_845G(dev)) {
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u32 tseg_size = 0;
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u32 tom;
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u8 tmp;
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
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I845_ESMRAMC, &tmp);
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if (tmp & TSEG_ENABLE) {
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switch (tmp & I845_TSEG_SIZE_MASK) {
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case I845_TSEG_SIZE_512K:
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tseg_size = KB(512);
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break;
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case I845_TSEG_SIZE_1M:
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tseg_size = MB(1);
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break;
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}
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}
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
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I830_DRB3, &tmp);
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tom = tmp * MB(32);
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base = tom - tseg_size - dev_priv->gtt.stolen_size;
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} else if (IS_I830(dev)) {
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u32 tseg_size = 0;
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u32 tom;
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u8 tmp;
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
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I830_ESMRAMC, &tmp);
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if (tmp & TSEG_ENABLE) {
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if (tmp & I830_TSEG_SIZE_1M)
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tseg_size = MB(1);
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else
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tseg_size = KB(512);
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}
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pci_bus_read_config_byte(dev->pdev->bus, PCI_DEVFN(0, 0),
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I830_DRB3, &tmp);
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tom = tmp * MB(32);
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base = tom - tseg_size - dev_priv->gtt.stolen_size;
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}
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if (base == 0)
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return 0;
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/* make sure we don't clobber the GTT if it's within stolen memory */
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if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) {
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struct {
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u32 start, end;
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} stolen[2] = {
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{ .start = base, .end = base + dev_priv->gtt.stolen_size, },
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{ .start = base, .end = base + dev_priv->gtt.stolen_size, },
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};
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u64 gtt_start, gtt_end;
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gtt_start = I915_READ(PGTBL_CTL);
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if (IS_GEN4(dev))
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gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) |
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(gtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
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else
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gtt_start &= PGTBL_ADDRESS_LO_MASK;
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gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4;
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if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end)
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stolen[0].end = gtt_start;
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if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end)
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stolen[1].start = gtt_end;
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/* pick the larger of the two chunks */
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if (stolen[0].end - stolen[0].start >
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stolen[1].end - stolen[1].start) {
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base = stolen[0].start;
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dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start;
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} else {
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base = stolen[1].start;
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dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start;
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}
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if (stolen[0].start != stolen[1].start ||
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stolen[0].end != stolen[1].end) {
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DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
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(unsigned long long) gtt_start,
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(unsigned long long) gtt_end - 1);
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DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n",
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base, base + (u32) dev_priv->gtt.stolen_size - 1);
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}
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}
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/* Verify that nothing else uses this physical address. Stolen
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* memory should be reserved by the BIOS and hidden from the
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* kernel. So if the region is already marked as busy, something
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* is seriously wrong.
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*/
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r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size,
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"Graphics Stolen Memory");
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if (r == NULL) {
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/*
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* One more attempt but this time requesting region from
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* base + 1, as we have seen that this resolves the region
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* conflict with the PCI Bus.
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* This is a BIOS w/a: Some BIOS wrap stolen in the root
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* PCI bus, but have an off-by-one error. Hence retry the
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* reservation starting from 1 instead of 0.
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*/
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r = devm_request_mem_region(dev->dev, base + 1,
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dev_priv->gtt.stolen_size - 1,
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"Graphics Stolen Memory");
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/*
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* GEN3 firmware likes to smash pci bridges into the stolen
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* range. Apparently this works.
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*/
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if (r == NULL && !IS_GEN3(dev)) {
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DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n",
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base, base + (uint32_t)dev_priv->gtt.stolen_size);
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base = 0;
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}
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}
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return base;
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}
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void i915_gem_cleanup_stolen(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (!drm_mm_initialized(&dev_priv->mm.stolen))
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return;
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drm_mm_takedown(&dev_priv->mm.stolen);
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}
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static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
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unsigned long *base, unsigned long *size)
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{
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uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
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CTG_STOLEN_RESERVED :
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ELK_STOLEN_RESERVED);
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unsigned long stolen_top = dev_priv->mm.stolen_base +
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dev_priv->gtt.stolen_size;
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*base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16;
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WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base);
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/* On these platforms, the register doesn't have a size field, so the
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* size is the distance between the base and the top of the stolen
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* memory. We also have the genuine case where base is zero and there's
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* nothing reserved. */
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if (*base == 0)
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*size = 0;
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else
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*size = stolen_top - *base;
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}
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static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
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unsigned long *base, unsigned long *size)
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{
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uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
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switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) {
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case GEN6_STOLEN_RESERVED_1M:
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*size = 1024 * 1024;
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break;
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case GEN6_STOLEN_RESERVED_512K:
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*size = 512 * 1024;
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break;
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case GEN6_STOLEN_RESERVED_256K:
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*size = 256 * 1024;
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break;
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case GEN6_STOLEN_RESERVED_128K:
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*size = 128 * 1024;
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break;
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default:
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*size = 1024 * 1024;
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MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK);
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}
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}
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static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
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unsigned long *base, unsigned long *size)
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{
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uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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*base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK;
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switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
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case GEN7_STOLEN_RESERVED_1M:
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*size = 1024 * 1024;
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break;
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case GEN7_STOLEN_RESERVED_256K:
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*size = 256 * 1024;
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break;
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default:
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*size = 1024 * 1024;
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MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
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}
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}
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static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv,
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unsigned long *base, unsigned long *size)
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{
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uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
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switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) {
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case GEN8_STOLEN_RESERVED_1M:
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*size = 1024 * 1024;
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break;
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case GEN8_STOLEN_RESERVED_2M:
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*size = 2 * 1024 * 1024;
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break;
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case GEN8_STOLEN_RESERVED_4M:
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*size = 4 * 1024 * 1024;
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break;
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case GEN8_STOLEN_RESERVED_8M:
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*size = 8 * 1024 * 1024;
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break;
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default:
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*size = 8 * 1024 * 1024;
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MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK);
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}
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}
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static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
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unsigned long *base, unsigned long *size)
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{
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uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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unsigned long stolen_top;
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stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
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*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
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/* On these platforms, the register doesn't have a size field, so the
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* size is the distance between the base and the top of the stolen
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* memory. We also have the genuine case where base is zero and there's
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* nothing reserved. */
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if (*base == 0)
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*size = 0;
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else
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*size = stolen_top - *base;
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}
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int i915_gem_init_stolen(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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unsigned long reserved_total, reserved_base = 0, reserved_size;
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unsigned long stolen_top;
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mutex_init(&dev_priv->mm.stolen_lock);
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#ifdef CONFIG_INTEL_IOMMU
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if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) {
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DRM_INFO("DMAR active, disabling use of stolen memory\n");
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return 0;
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}
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#endif
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if (dev_priv->gtt.stolen_size == 0)
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return 0;
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dev_priv->mm.stolen_base = i915_stolen_to_physical(dev);
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if (dev_priv->mm.stolen_base == 0)
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return 0;
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stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
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switch (INTEL_INFO(dev_priv)->gen) {
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case 2:
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case 3:
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break;
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case 4:
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if (IS_G4X(dev))
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g4x_get_stolen_reserved(dev_priv, &reserved_base,
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&reserved_size);
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break;
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case 5:
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/* Assume the gen6 maximum for the older platforms. */
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reserved_size = 1024 * 1024;
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reserved_base = stolen_top - reserved_size;
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break;
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case 6:
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gen6_get_stolen_reserved(dev_priv, &reserved_base,
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&reserved_size);
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break;
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case 7:
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gen7_get_stolen_reserved(dev_priv, &reserved_base,
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&reserved_size);
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break;
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default:
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if (IS_BROADWELL(dev_priv) ||
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IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev))
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bdw_get_stolen_reserved(dev_priv, &reserved_base,
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&reserved_size);
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else
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gen8_get_stolen_reserved(dev_priv, &reserved_base,
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&reserved_size);
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break;
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}
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/* It is possible for the reserved base to be zero, but the register
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* field for size doesn't have a zero option. */
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if (reserved_base == 0) {
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reserved_size = 0;
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reserved_base = stolen_top;
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}
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if (reserved_base < dev_priv->mm.stolen_base ||
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reserved_base + reserved_size > stolen_top) {
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DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n",
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reserved_base, reserved_base + reserved_size,
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dev_priv->mm.stolen_base, stolen_top);
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return 0;
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}
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|
/* It is possible for the reserved area to end before the end of stolen
|
|
* memory, so just consider the start. */
|
|
reserved_total = stolen_top - reserved_base;
|
|
|
|
DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n",
|
|
dev_priv->gtt.stolen_size >> 10,
|
|
(dev_priv->gtt.stolen_size - reserved_total) >> 10);
|
|
|
|
dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size -
|
|
reserved_total;
|
|
|
|
/*
|
|
* Basic memrange allocator for stolen space.
|
|
*
|
|
* TODO: Notice that some platforms require us to not use the first page
|
|
* of the stolen memory but their BIOSes may still put the framebuffer
|
|
* on the first page. So we don't reserve this page for now because of
|
|
* that. Our current solution is to just prevent new nodes from being
|
|
* inserted on the first page - see the check we have at
|
|
* i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon
|
|
* problem later.
|
|
*/
|
|
drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sg_table *
|
|
i915_pages_create_for_stolen(struct drm_device *dev,
|
|
u32 offset, u32 size)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct sg_table *st;
|
|
struct scatterlist *sg;
|
|
|
|
DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size);
|
|
BUG_ON(offset > dev_priv->gtt.stolen_size - size);
|
|
|
|
/* We hide that we have no struct page backing our stolen object
|
|
* by wrapping the contiguous physical allocation with a fake
|
|
* dma mapping in a single scatterlist.
|
|
*/
|
|
|
|
st = kmalloc(sizeof(*st), GFP_KERNEL);
|
|
if (st == NULL)
|
|
return NULL;
|
|
|
|
if (sg_alloc_table(st, 1, GFP_KERNEL)) {
|
|
kfree(st);
|
|
return NULL;
|
|
}
|
|
|
|
sg = st->sgl;
|
|
sg->offset = 0;
|
|
sg->length = size;
|
|
|
|
sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
|
|
sg_dma_len(sg) = size;
|
|
|
|
return st;
|
|
}
|
|
|
|
static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj)
|
|
{
|
|
BUG();
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj)
|
|
{
|
|
/* Should only be called during free */
|
|
sg_free_table(obj->pages);
|
|
kfree(obj->pages);
|
|
}
|
|
|
|
|
|
static void
|
|
i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
|
|
{
|
|
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
|
|
|
if (obj->stolen) {
|
|
i915_gem_stolen_remove_node(dev_priv, obj->stolen);
|
|
kfree(obj->stolen);
|
|
obj->stolen = NULL;
|
|
}
|
|
}
|
|
static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = {
|
|
.get_pages = i915_gem_object_get_pages_stolen,
|
|
.put_pages = i915_gem_object_put_pages_stolen,
|
|
.release = i915_gem_object_release_stolen,
|
|
};
|
|
|
|
static struct drm_i915_gem_object *
|
|
_i915_gem_object_create_stolen(struct drm_device *dev,
|
|
struct drm_mm_node *stolen)
|
|
{
|
|
struct drm_i915_gem_object *obj;
|
|
|
|
obj = i915_gem_object_alloc(dev);
|
|
if (obj == NULL)
|
|
return NULL;
|
|
|
|
drm_gem_private_object_init(dev, &obj->base, stolen->size);
|
|
i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
|
|
|
|
obj->pages = i915_pages_create_for_stolen(dev,
|
|
stolen->start, stolen->size);
|
|
if (obj->pages == NULL)
|
|
goto cleanup;
|
|
|
|
obj->get_page.sg = obj->pages->sgl;
|
|
obj->get_page.last = 0;
|
|
|
|
i915_gem_object_pin_pages(obj);
|
|
obj->stolen = stolen;
|
|
|
|
obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
|
|
obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE;
|
|
|
|
return obj;
|
|
|
|
cleanup:
|
|
i915_gem_object_free(obj);
|
|
return NULL;
|
|
}
|
|
|
|
struct drm_i915_gem_object *
|
|
i915_gem_object_create_stolen(struct drm_device *dev, u32 size)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_i915_gem_object *obj;
|
|
struct drm_mm_node *stolen;
|
|
int ret;
|
|
|
|
if (!drm_mm_initialized(&dev_priv->mm.stolen))
|
|
return NULL;
|
|
|
|
DRM_DEBUG_KMS("creating stolen object: size=%x\n", size);
|
|
if (size == 0)
|
|
return NULL;
|
|
|
|
stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
|
|
if (!stolen)
|
|
return NULL;
|
|
|
|
ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);
|
|
if (ret) {
|
|
kfree(stolen);
|
|
return NULL;
|
|
}
|
|
|
|
obj = _i915_gem_object_create_stolen(dev, stolen);
|
|
if (obj)
|
|
return obj;
|
|
|
|
i915_gem_stolen_remove_node(dev_priv, stolen);
|
|
kfree(stolen);
|
|
return NULL;
|
|
}
|
|
|
|
struct drm_i915_gem_object *
|
|
i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
|
|
u32 stolen_offset,
|
|
u32 gtt_offset,
|
|
u32 size)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct i915_address_space *ggtt = &dev_priv->gtt.base;
|
|
struct drm_i915_gem_object *obj;
|
|
struct drm_mm_node *stolen;
|
|
struct i915_vma *vma;
|
|
int ret;
|
|
|
|
if (!drm_mm_initialized(&dev_priv->mm.stolen))
|
|
return NULL;
|
|
|
|
DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n",
|
|
stolen_offset, gtt_offset, size);
|
|
|
|
/* KISS and expect everything to be page-aligned */
|
|
if (WARN_ON(size == 0) || WARN_ON(size & 4095) ||
|
|
WARN_ON(stolen_offset & 4095))
|
|
return NULL;
|
|
|
|
stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
|
|
if (!stolen)
|
|
return NULL;
|
|
|
|
stolen->start = stolen_offset;
|
|
stolen->size = size;
|
|
mutex_lock(&dev_priv->mm.stolen_lock);
|
|
ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
|
|
mutex_unlock(&dev_priv->mm.stolen_lock);
|
|
if (ret) {
|
|
DRM_DEBUG_KMS("failed to allocate stolen space\n");
|
|
kfree(stolen);
|
|
return NULL;
|
|
}
|
|
|
|
obj = _i915_gem_object_create_stolen(dev, stolen);
|
|
if (obj == NULL) {
|
|
DRM_DEBUG_KMS("failed to allocate stolen object\n");
|
|
i915_gem_stolen_remove_node(dev_priv, stolen);
|
|
kfree(stolen);
|
|
return NULL;
|
|
}
|
|
|
|
/* Some objects just need physical mem from stolen space */
|
|
if (gtt_offset == I915_GTT_OFFSET_NONE)
|
|
return obj;
|
|
|
|
vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt);
|
|
if (IS_ERR(vma)) {
|
|
ret = PTR_ERR(vma);
|
|
goto err;
|
|
}
|
|
|
|
/* To simplify the initialisation sequence between KMS and GTT,
|
|
* we allow construction of the stolen object prior to
|
|
* setting up the GTT space. The actual reservation will occur
|
|
* later.
|
|
*/
|
|
vma->node.start = gtt_offset;
|
|
vma->node.size = size;
|
|
if (drm_mm_initialized(&ggtt->mm)) {
|
|
ret = drm_mm_reserve_node(&ggtt->mm, &vma->node);
|
|
if (ret) {
|
|
DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
|
|
goto err;
|
|
}
|
|
|
|
vma->bound |= GLOBAL_BIND;
|
|
__i915_vma_set_map_and_fenceable(vma);
|
|
list_add_tail(&vma->mm_list, &ggtt->inactive_list);
|
|
}
|
|
|
|
list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
|
|
i915_gem_object_pin_pages(obj);
|
|
|
|
return obj;
|
|
|
|
err:
|
|
drm_gem_object_unreference(&obj->base);
|
|
return NULL;
|
|
}
|