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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-29 03:49:53 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-29 03:49:53 +0300 |
commit | 53b3b6bbfde6aae8d1ededc86ad4e0e1e00eb5f8 (patch) | |
tree | b29473f21270aefd113b298c9402be8b4b3c91b4 /drivers/gpu/drm/vkms/vkms_gem.c | |
parent | 746bb4ed6d626f3f9e431a7f9b20504538e62ded (diff) | |
parent | f2bfc71aee75feff33ca659322b72ffeed5a243d (diff) | |
download | linux-53b3b6bbfde6aae8d1ededc86ad4e0e1e00eb5f8.tar.xz |
Merge tag 'drm-next-2018-10-24' of git://anongit.freedesktop.org/drm/drm
Pull drm updates from Dave Airlie:
"This is going to rebuild more than drm as it adds a new helper to
list.h for doing bulk updates. Seemed like a reasonable addition to
me.
Otherwise the usual merge window stuff lots of i915 and amdgpu, not so
much nouveau, and piles of everything else.
Core:
- Adds a new list.h helper for doing bulk list updates for TTM.
- Don't leak fb address in smem_start to userspace (comes with EXPORT
workaround for people using mali out of tree hacks)
- udmabuf device to turn memfd regions into dma-buf
- Per-plane blend mode property
- ref/unref replacements with get/put
- fbdev conflicting framebuffers code cleaned up
- host-endian format variants
- panel orientation quirk for Acer One 10
bridge:
- TI SN65DSI86 chip support
vkms:
- GEM support.
- Cursor support
amdgpu:
- Merge amdkfd and amdgpu into one module
- CEC over DP AUX support
- Picasso APU support + VCN dynamic powergating
- Raven2 APU support
- Vega20 enablement + kfd support
- ACP powergating improvements
- ABGR/XBGR display support
- VCN jpeg support
- xGMI support
- DC i2c/aux cleanup
- Ycbcr 4:2:0 support
- GPUVM improvements
- Powerplay and powerplay endian fixes
- Display underflow fixes
vmwgfx:
- Move vmwgfx specific TTM code to vmwgfx
- Split out vmwgfx buffer/resource validation code
- Atomic operation rework
bochs:
- use more helpers
- format/byteorder improvements
qxl:
- use more helpers
i915:
- GGTT coherency getparam
- Turn off resource streamer API
- More Icelake enablement + DMC firmware
- Full PPGTT for Ivybridge, Haswell and Valleyview
- DDB distribution based on resolution
- Limited range DP display support
nouveau:
- CEC over DP AUX support
- Initial HDMI 2.0 support
virtio-gpu:
- vmap support for PRIME objects
tegra:
- Initial Tegra194 support
- DMA/IOMMU integration fixes
msm:
- a6xx perf improvements + clock prefix
- GPU preemption optimisations
- a6xx devfreq support
- cursor support
rockchip:
- PX30 support
- rgb output interface support
mediatek:
- HDMI output support on mt2701 and mt7623
rcar-du:
- Interlaced modes on Gen3
- LVDS on R8A77980
- D3 and E3 SoC support
hisilicon:
- misc fixes
mxsfb:
- runtime pm support
sun4i:
- R40 TCON support
- Allwinner A64 support
- R40 HDMI support
omapdrm:
- Driver rework changing display pipeline ordering to use common code
- DMM memory barrier and irq fixes
- Errata workarounds
exynos:
- out-bridge support for LVDS bridge driver
- Samsung 16x16 tiled format support
- Plane alpha and pixel blend mode support
tilcdc:
- suspend/resume update
mali-dp:
- misc updates"
* tag 'drm-next-2018-10-24' of git://anongit.freedesktop.org/drm/drm: (1382 commits)
firmware/dmc/icl: Add missing MODULE_FIRMWARE() for Icelake.
drm/i915/icl: Fix signal_levels
drm/i915/icl: Fix DDI/TC port clk_off bits
drm/i915/icl: create function to identify combophy port
drm/i915/gen9+: Fix initial readout for Y tiled framebuffers
drm/i915: Large page offsets for pread/pwrite
drm/i915/selftests: Disable shrinker across mmap-exhaustion
drm/i915/dp: Link train Fallback on eDP only if fallback link BW can fit panel's native mode
drm/i915: Fix intel_dp_mst_best_encoder()
drm/i915: Skip vcpi allocation for MSTB ports that are gone
drm/i915: Don't unset intel_connector->mst_port
drm/i915: Only reset seqno if actually idle
drm/i915: Use the correct crtc when sanitizing plane mapping
drm/i915: Restore vblank interrupts earlier
drm/i915: Check fb stride against plane max stride
drm/amdgpu/vcn:Fix uninitialized symbol error
drm: panel-orientation-quirks: Add quirk for Acer One 10 (S1003)
drm/amd/amdgpu: Fix debugfs error handling
drm/amdgpu: Update gc_9_0 golden settings.
drm/amd/powerplay: update PPtable with DC BTC and Tvr SocLimit fields
...
Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_gem.c')
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_gem.c | 83 |
1 files changed, 79 insertions, 4 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_gem.c b/drivers/gpu/drm/vkms/vkms_gem.c index c7e38368602b..d04e988b4cbe 100644 --- a/drivers/gpu/drm/vkms/vkms_gem.c +++ b/drivers/gpu/drm/vkms/vkms_gem.c @@ -37,20 +37,22 @@ void vkms_gem_free_object(struct drm_gem_object *obj) struct vkms_gem_object *gem = container_of(obj, struct vkms_gem_object, gem); - kvfree(gem->pages); + WARN_ON(gem->pages); + WARN_ON(gem->vaddr); + mutex_destroy(&gem->pages_lock); drm_gem_object_release(obj); kfree(gem); } -int vkms_gem_fault(struct vm_fault *vmf) +vm_fault_t vkms_gem_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct vkms_gem_object *obj = vma->vm_private_data; unsigned long vaddr = vmf->address; pgoff_t page_offset; loff_t num_pages; - int ret; + vm_fault_t ret = VM_FAULT_SIGBUS; page_offset = (vaddr - vma->vm_start) >> PAGE_SHIFT; num_pages = DIV_ROUND_UP(obj->gem.size, PAGE_SIZE); @@ -58,7 +60,6 @@ int vkms_gem_fault(struct vm_fault *vmf) if (page_offset > num_pages) return VM_FAULT_SIGBUS; - ret = -ENOENT; mutex_lock(&obj->pages_lock); if (obj->pages) { get_page(obj->pages[page_offset]); @@ -177,3 +178,77 @@ unref: return ret; } + +static struct page **_get_pages(struct vkms_gem_object *vkms_obj) +{ + struct drm_gem_object *gem_obj = &vkms_obj->gem; + + if (!vkms_obj->pages) { + struct page **pages = drm_gem_get_pages(gem_obj); + + if (IS_ERR(pages)) + return pages; + + if (cmpxchg(&vkms_obj->pages, NULL, pages)) + drm_gem_put_pages(gem_obj, pages, false, true); + } + + return vkms_obj->pages; +} + +void vkms_gem_vunmap(struct drm_gem_object *obj) +{ + struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj); + + mutex_lock(&vkms_obj->pages_lock); + if (vkms_obj->vmap_count < 1) { + WARN_ON(vkms_obj->vaddr); + WARN_ON(vkms_obj->pages); + mutex_unlock(&vkms_obj->pages_lock); + return; + } + + vkms_obj->vmap_count--; + + if (vkms_obj->vmap_count == 0) { + vunmap(vkms_obj->vaddr); + vkms_obj->vaddr = NULL; + drm_gem_put_pages(obj, vkms_obj->pages, false, true); + vkms_obj->pages = NULL; + } + + mutex_unlock(&vkms_obj->pages_lock); +} + +int vkms_gem_vmap(struct drm_gem_object *obj) +{ + struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj); + int ret = 0; + + mutex_lock(&vkms_obj->pages_lock); + + if (!vkms_obj->vaddr) { + unsigned int n_pages = obj->size >> PAGE_SHIFT; + struct page **pages = _get_pages(vkms_obj); + + if (IS_ERR(pages)) { + ret = PTR_ERR(pages); + goto out; + } + + vkms_obj->vaddr = vmap(pages, n_pages, VM_MAP, PAGE_KERNEL); + if (!vkms_obj->vaddr) + goto err_vmap; + } + + vkms_obj->vmap_count++; + goto out; + +err_vmap: + ret = -ENOMEM; + drm_gem_put_pages(obj, vkms_obj->pages, false, true); + vkms_obj->pages = NULL; +out: + mutex_unlock(&vkms_obj->pages_lock); + return ret; +} |