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![Matthew Auld](/assets/img/avatar_default.png)
It really wants dev_priv anyway, also now matches i915_gem_init_stolen. Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180920142707.19659-2-matthew.auld@intel.com
718 lines
19 KiB
C
718 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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/*
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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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/* WaSkipStolenMemoryFirstPage:bdw+ */
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if (INTEL_GEN(dev_priv) >= 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,
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size, alignment, 0,
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start, end, DRM_MM_INSERT_BEST);
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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, U64_MAX);
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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 int i915_adjust_stolen(struct drm_i915_private *dev_priv,
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struct resource *dsm)
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{
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struct i915_ggtt *ggtt = &dev_priv->ggtt;
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struct resource *r;
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if (dsm->start == 0 || dsm->end <= dsm->start)
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return -EINVAL;
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/*
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* TODO: We have yet too encounter the case where the GTT wasn't at the
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* end of stolen. With that assumption we could simplify this.
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*/
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/* Make sure we don't clobber the GTT if it's within stolen memory */
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if (INTEL_GEN(dev_priv) <= 4 &&
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!IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
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struct resource stolen[2] = {*dsm, *dsm};
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struct resource ggtt_res;
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resource_size_t ggtt_start;
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ggtt_start = I915_READ(PGTBL_CTL);
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if (IS_GEN4(dev_priv))
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ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) |
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(ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
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else
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ggtt_start &= PGTBL_ADDRESS_LO_MASK;
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ggtt_res =
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(struct resource) DEFINE_RES_MEM(ggtt_start,
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ggtt_total_entries(ggtt) * 4);
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if (ggtt_res.start >= stolen[0].start && ggtt_res.start < stolen[0].end)
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stolen[0].end = ggtt_res.start;
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if (ggtt_res.end > stolen[1].start && ggtt_res.end <= stolen[1].end)
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stolen[1].start = ggtt_res.end;
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/* Pick the larger of the two chunks */
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if (resource_size(&stolen[0]) > resource_size(&stolen[1]))
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*dsm = stolen[0];
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else
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*dsm = stolen[1];
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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_DRIVER("GTT within stolen memory at %pR\n", &ggtt_res);
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DRM_DEBUG_DRIVER("Stolen memory adjusted to %pR\n", dsm);
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}
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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_priv->drm.dev, dsm->start,
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resource_size(dsm),
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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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* start + 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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* There's also BIOS with off-by-one on the other end.
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*/
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r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1,
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resource_size(dsm) - 2,
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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_priv)) {
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DRM_ERROR("conflict detected with stolen region: %pR\n",
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dsm);
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return -EBUSY;
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}
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}
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return 0;
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}
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void i915_gem_cleanup_stolen(struct drm_i915_private *dev_priv)
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{
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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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resource_size_t *base,
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resource_size_t *size)
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{
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u32 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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resource_size_t stolen_top = dev_priv->dsm.end + 1;
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DRM_DEBUG_DRIVER("%s_STOLEN_RESERVED = %08x\n",
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IS_GM45(dev_priv) ? "CTG" : "ELK", reg_val);
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if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0)
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return;
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/*
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* Whether ILK really reuses the ELK register for this is unclear.
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* Let's see if we catch anyone with this supposedly enabled on ILK.
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*/
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WARN(IS_GEN5(dev_priv), "ILK stolen reserved found? 0x%08x\n", reg_val);
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if (!(reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK))
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return;
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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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*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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resource_size_t *base,
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resource_size_t *size)
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{
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u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
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if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE))
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return;
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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 vlv_get_stolen_reserved(struct drm_i915_private *dev_priv,
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resource_size_t *base,
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resource_size_t *size)
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{
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u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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resource_size_t stolen_top = dev_priv->dsm.end + 1;
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
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if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE))
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return;
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switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
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default:
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MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
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/* fall through */
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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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}
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/*
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* On vlv, the ADDR_MASK portion is left as 0 and HW deduces the
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* reserved location as (top - size).
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*/
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*base = stolen_top - *size;
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}
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static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
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resource_size_t *base,
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resource_size_t *size)
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{
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u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
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if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE))
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return;
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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 chv_get_stolen_reserved(struct drm_i915_private *dev_priv,
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resource_size_t *base,
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resource_size_t *size)
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{
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u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
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if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE))
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return;
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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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resource_size_t *base,
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resource_size_t *size)
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{
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u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);
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resource_size_t stolen_top = dev_priv->dsm.end + 1;
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
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if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE))
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return;
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if (!(reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK))
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return;
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*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
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*size = stolen_top - *base;
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}
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static void icl_get_stolen_reserved(struct drm_i915_private *dev_priv,
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resource_size_t *base,
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resource_size_t *size)
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{
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u64 reg_val = I915_READ64(GEN6_STOLEN_RESERVED);
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DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = 0x%016llx\n", reg_val);
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*base = reg_val & GEN11_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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int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
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{
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resource_size_t reserved_base, stolen_top;
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resource_size_t reserved_total, reserved_size;
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mutex_init(&dev_priv->mm.stolen_lock);
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if (intel_vgpu_active(dev_priv)) {
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DRM_INFO("iGVT-g active, disabling use of stolen memory\n");
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return 0;
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}
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if (intel_vtd_active() && INTEL_GEN(dev_priv) < 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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if (resource_size(&intel_graphics_stolen_res) == 0)
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return 0;
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dev_priv->dsm = intel_graphics_stolen_res;
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if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))
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return 0;
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GEM_BUG_ON(dev_priv->dsm.start == 0);
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GEM_BUG_ON(dev_priv->dsm.end <= dev_priv->dsm.start);
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stolen_top = dev_priv->dsm.end + 1;
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reserved_base = stolen_top;
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reserved_size = 0;
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switch (INTEL_GEN(dev_priv)) {
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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_priv))
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break;
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/* fall through */
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case 5:
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g4x_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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break;
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case 6:
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gen6_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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break;
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case 7:
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if (IS_VALLEYVIEW(dev_priv))
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vlv_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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else
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gen7_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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break;
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case 8:
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case 9:
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case 10:
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if (IS_LP(dev_priv))
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chv_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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else
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bdw_get_stolen_reserved(dev_priv,
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&reserved_base, &reserved_size);
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break;
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case 11:
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default:
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icl_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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/*
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* Our expectation is that the reserved space is at the top of the
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* stolen region and *never* at the bottom. If we see !reserved_base,
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* it likely means we failed to read the registers correctly.
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*/
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if (!reserved_base) {
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DRM_ERROR("inconsistent reservation %pa + %pa; ignoring\n",
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&reserved_base, &reserved_size);
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reserved_base = stolen_top;
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reserved_size = 0;
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}
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dev_priv->dsm_reserved =
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(struct resource) DEFINE_RES_MEM(reserved_base, reserved_size);
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if (!resource_contains(&dev_priv->dsm, &dev_priv->dsm_reserved)) {
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DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n",
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&dev_priv->dsm_reserved, &dev_priv->dsm);
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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_DRIVER("Memory reserved for graphics device: %lluK, usable: %lluK\n",
|
|
(u64)resource_size(&dev_priv->dsm) >> 10,
|
|
((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10);
|
|
|
|
dev_priv->stolen_usable_size =
|
|
resource_size(&dev_priv->dsm) - reserved_total;
|
|
|
|
/* Basic memrange allocator for stolen space. */
|
|
drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->stolen_usable_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sg_table *
|
|
i915_pages_create_for_stolen(struct drm_device *dev,
|
|
resource_size_t offset, resource_size_t size)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
struct sg_table *st;
|
|
struct scatterlist *sg;
|
|
|
|
GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));
|
|
|
|
/* 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 ERR_PTR(-ENOMEM);
|
|
|
|
if (sg_alloc_table(st, 1, GFP_KERNEL)) {
|
|
kfree(st);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
sg = st->sgl;
|
|
sg->offset = 0;
|
|
sg->length = size;
|
|
|
|
sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset;
|
|
sg_dma_len(sg) = size;
|
|
|
|
return st;
|
|
}
|
|
|
|
static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj)
|
|
{
|
|
struct sg_table *pages =
|
|
i915_pages_create_for_stolen(obj->base.dev,
|
|
obj->stolen->start,
|
|
obj->stolen->size);
|
|
if (IS_ERR(pages))
|
|
return PTR_ERR(pages);
|
|
|
|
__i915_gem_object_set_pages(obj, pages, obj->stolen->size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj,
|
|
struct sg_table *pages)
|
|
{
|
|
/* Should only be called from i915_gem_object_release_stolen() */
|
|
sg_free_table(pages);
|
|
kfree(pages);
|
|
}
|
|
|
|
static void
|
|
i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
|
|
struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen);
|
|
|
|
GEM_BUG_ON(!stolen);
|
|
|
|
__i915_gem_object_unpin_pages(obj);
|
|
|
|
i915_gem_stolen_remove_node(dev_priv, stolen);
|
|
kfree(stolen);
|
|
}
|
|
|
|
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_i915_private *dev_priv,
|
|
struct drm_mm_node *stolen)
|
|
{
|
|
struct drm_i915_gem_object *obj;
|
|
unsigned int cache_level;
|
|
|
|
obj = i915_gem_object_alloc(dev_priv);
|
|
if (obj == NULL)
|
|
return NULL;
|
|
|
|
drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size);
|
|
i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
|
|
|
|
obj->stolen = stolen;
|
|
obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
|
|
cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE;
|
|
i915_gem_object_set_cache_coherency(obj, cache_level);
|
|
|
|
if (i915_gem_object_pin_pages(obj))
|
|
goto cleanup;
|
|
|
|
return obj;
|
|
|
|
cleanup:
|
|
i915_gem_object_free(obj);
|
|
return NULL;
|
|
}
|
|
|
|
struct drm_i915_gem_object *
|
|
i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
|
|
resource_size_t size)
|
|
{
|
|
struct drm_i915_gem_object *obj;
|
|
struct drm_mm_node *stolen;
|
|
int ret;
|
|
|
|
if (!drm_mm_initialized(&dev_priv->mm.stolen))
|
|
return NULL;
|
|
|
|
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_priv, 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_i915_private *dev_priv,
|
|
resource_size_t stolen_offset,
|
|
resource_size_t gtt_offset,
|
|
resource_size_t size)
|
|
{
|
|
struct i915_ggtt *ggtt = &dev_priv->ggtt;
|
|
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;
|
|
|
|
lockdep_assert_held(&dev_priv->drm.struct_mutex);
|
|
|
|
DRM_DEBUG_DRIVER("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n",
|
|
&stolen_offset, >t_offset, &size);
|
|
|
|
/* KISS and expect everything to be page-aligned */
|
|
if (WARN_ON(size == 0) ||
|
|
WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) ||
|
|
WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT)))
|
|
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_DRIVER("failed to allocate stolen space\n");
|
|
kfree(stolen);
|
|
return NULL;
|
|
}
|
|
|
|
obj = _i915_gem_object_create_stolen(dev_priv, stolen);
|
|
if (obj == NULL) {
|
|
DRM_DEBUG_DRIVER("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;
|
|
|
|
ret = i915_gem_object_pin_pages(obj);
|
|
if (ret)
|
|
goto err;
|
|
|
|
vma = i915_vma_instance(obj, &ggtt->vm, NULL);
|
|
if (IS_ERR(vma)) {
|
|
ret = PTR_ERR(vma);
|
|
goto err_pages;
|
|
}
|
|
|
|
/* 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.
|
|
*/
|
|
ret = i915_gem_gtt_reserve(&ggtt->vm, &vma->node,
|
|
size, gtt_offset, obj->cache_level,
|
|
0);
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("failed to allocate stolen GTT space\n");
|
|
goto err_pages;
|
|
}
|
|
|
|
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
|
|
|
|
vma->pages = obj->mm.pages;
|
|
vma->flags |= I915_VMA_GLOBAL_BIND;
|
|
__i915_vma_set_map_and_fenceable(vma);
|
|
list_move_tail(&vma->vm_link, &ggtt->vm.inactive_list);
|
|
|
|
spin_lock(&dev_priv->mm.obj_lock);
|
|
list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
|
|
obj->bind_count++;
|
|
spin_unlock(&dev_priv->mm.obj_lock);
|
|
|
|
return obj;
|
|
|
|
err_pages:
|
|
i915_gem_object_unpin_pages(obj);
|
|
err:
|
|
i915_gem_object_put(obj);
|
|
return NULL;
|
|
}
|