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linux-stable/drivers/gpu/drm/i915
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Tvrtko Ursulin 0c40ce130e drm/i915: Trim the object sg table 
At the moment we allocate enough sg table entries assuming we
will not be able to do any coalescing. But since in practice
we most often can, and more so very effectively, this ends up
wasting a lot of memory.

A simple and effective way of trimming the over-allocated
entries is to copy the table over to a new one allocated to the
exact size.

Experiments on my freshly logged and idle desktop (KDE) showed
that by doing this we can save approximately 1 MiB of RAM, or
when running a typical benchmark like gl_manhattan I have
even seen a 6 MiB saving.

More complicated techniques such as only copying the last used
page and freeing the rest are left to the reader.

v2:
 * Update commit message.
 * Use temporary sg_table on stack. (Chris Wilson)

v3:
 * Commit message update.
 * Comment added.
 * Replace memcpy with copy assignment.
   (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1478704423-7447-1-git-send-email-tvrtko.ursulin@linux.intel.com
2016-11-10 09:29:25 +00:00
..
gvt drm/i915/gvt: implement scratch page table tree for shadow PPGTT 2016-11-07 14:17:02 +08:00
dvo.h
dvo_ch7xxx.c
dvo_ch7017.c
dvo_ivch.c
dvo_ns2501.c
dvo_sil164.c
dvo_tfp410.c
i915_cmd_parser.c drm/i915: Refactor object page API 2016-10-28 20:53:46 +01:00
i915_debugfs.c drm/i915: Remove two sloppy inline functions from .h 2016-11-08 12:36:35 +02:00
i915_drv.c drm/i915: Reinit polling before hpd when resuming 2016-11-04 13:50:34 -04:00
i915_drv.h drm/i915: Remove chipset flush after cache flush 2016-11-08 11:04:04 +00:00
i915_gem.c drm/i915: Trim the object sg table 2016-11-10 09:29:25 +00:00
i915_gem.h drm/i915: avoid harmless empty-body warning 2016-11-08 17:33:47 +01:00
i915_gem_batch_pool.c drm/i915: Move GEM activity tracking into a common struct reservation_object 2016-10-28 20:53:50 +01:00
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Export a function to flush the context upon pinning 2016-11-01 14:26:33 +00:00
i915_gem_dmabuf.c drm/i915: Move GEM activity tracking into a common struct reservation_object 2016-10-28 20:53:50 +01:00
i915_gem_evict.c drm/i915: Enable multiple timelines 2016-10-28 20:53:57 +01:00
i915_gem_execbuffer.c drm/i915: Mark CPU cache as dirty when used for rendering 2016-11-07 20:54:39 +00:00
i915_gem_fence.c drm/i915: Pass around sg_table to get_pages/put_pages backend 2016-10-28 20:53:47 +01:00
i915_gem_gtt.c drm/i915: Remove the vma from the object list upon close 2016-11-07 11:32:24 +00:00
i915_gem_gtt.h drm/i915: Store the vma in an rbtree under the object 2016-11-01 13:00:40 +00:00
i915_gem_internal.c drm/i915: Allow shrinking of userptr objects once again 2016-11-01 16:35:26 +00:00
i915_gem_render_state.c drm/i915: Introduce HAS_64BIT_RELOC 2016-11-03 12:45:57 +02:00
i915_gem_render_state.h drm/i915: Reuse the active golden render state batch 2016-10-28 20:53:44 +01:00
i915_gem_request.c drm/i915: Spin until breadcrumb threads are complete 2016-11-09 15:01:52 +00:00
i915_gem_request.h drm/i915: Remove two sloppy inline functions from .h 2016-11-08 12:36:35 +02:00
i915_gem_shrinker.c drm/i915: Unify global_list into global_link 2016-11-02 15:17:13 +02:00
i915_gem_stolen.c drm/i915: Unify global_list into global_link 2016-11-02 15:17:13 +02:00
i915_gem_tiling.c drm/i915: Fix pages pin counting around swizzle quirk 2016-11-04 11:55:39 +00:00
i915_gem_timeline.c drm/i915: Enable multiple timelines 2016-10-28 20:53:57 +01:00
i915_gem_timeline.h drm/i915: Enable multiple timelines 2016-10-28 20:53:57 +01:00
i915_gem_userptr.c drm/i915: Allow shrinking of userptr objects once again 2016-11-01 16:35:26 +00:00
i915_gpu_error.c drm/i915: Remove two sloppy inline functions from .h 2016-11-08 12:36:35 +02:00
i915_guc_reg.h
i915_guc_submission.c drm/i915/guc: Cache the client mapping 2016-11-03 19:57:43 +00:00
i915_ioc32.c
i915_irq.c drm/i915: Move hangcheck code out from i915_irq.c 2016-11-02 11:59:10 +02:00
i915_memcpy.c
i915_mm.c
i915_params.c drm/i915: Allow disabling error capture 2016-10-12 12:00:32 +01:00
i915_params.h drm/i915: Allow disabling error capture 2016-10-12 12:00:32 +01:00
i915_pci.c drm/i915: Introduce HAS_64BIT_RELOC 2016-11-03 12:45:57 +02:00
i915_pvinfo.h
i915_reg.h drm/i915: Address broxton phy registers based on phy and channel number 2016-10-28 12:25:24 +03:00
i915_suspend.c drm/i915: Make IS_GEN macros only take dev_priv 2016-10-14 12:23:22 +01:00
i915_sw_fence.c drm/i915: Allow i915_sw_fence_await_sw_fence() to allocate 2016-10-28 20:53:42 +01:00
i915_sw_fence.h drm/i915: Allow i915_sw_fence_await_sw_fence() to allocate 2016-10-28 20:53:42 +01:00
i915_sysfs.c drm/i915: Allow disabling error capture 2016-10-12 12:00:32 +01:00
i915_trace.h drm/i915: Introduce a global_seqno for each request 2016-10-28 20:53:53 +01:00
i915_trace_points.c
i915_vgpu.c
i915_vgpu.h
intel_acpi.c
intel_atomic.c
intel_atomic_plane.c drm/i915: Move GEM activity tracking into a common struct reservation_object 2016-10-28 20:53:50 +01:00
intel_audio.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_bios.c drm/i915: Clean up DDI DDC/AUX CH sanitation 2016-10-21 15:43:40 +03:00
intel_bios.h
intel_breadcrumbs.c drm/i915: Spin until breadcrumb threads are complete 2016-11-09 15:01:52 +00:00
intel_color.c drm/i915: Make IS_CHERRYVIEW only take dev_priv 2016-10-14 12:23:19 +01:00
intel_crt.c drm/i915: Pass dev_priv to intel_wait_for_vblank() 2016-11-01 16:40:38 +02:00
intel_csr.c drm/i915/DMC/KBL: Load DMC on KBL using the no_stepping_info array 2016-10-26 14:20:53 -07:00
intel_ddi.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_device_info.c drm/i915: Don't try to initialize sprite planes on pre-ilk 2016-10-31 16:56:32 +02:00
intel_display.c drm/i915: Pass atomic state to verify_connector_state 2016-11-09 13:55:21 +01:00
intel_dp.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_dp_aux_backlight.c
intel_dp_link_training.c
intel_dp_mst.c
intel_dpio_phy.c drm/i915/bxt: Don't set OCL2_LDOFUSE_PWR_DIS bit in phy init sequence 2016-11-02 09:35:47 +02:00
intel_dpll_mgr.c drm/i915: Address broxton phy registers based on phy and channel number 2016-10-28 12:25:24 +03:00
intel_dpll_mgr.h
intel_drv.h drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_dsi.c drm/i915: Make IS_CHERRYVIEW only take dev_priv 2016-10-14 12:23:19 +01:00
intel_dsi.h
intel_dsi_dcs_backlight.c
intel_dsi_panel_vbt.c
intel_dsi_pll.c drm/i915: Make IS_BROXTON only take dev_priv 2016-10-14 12:23:19 +01:00
intel_dvo.c drm/i915: Pass dev_priv to intel_get_crtc_for_pipe() 2016-11-01 16:40:38 +02:00
intel_engine_cs.c drm/i915: Move hangcheck code out from i915_irq.c 2016-11-02 11:59:10 +02:00
intel_fbc.c drm/i915: Pass intel_crtc to intel_crtc_active() 2016-11-01 16:40:38 +02:00
intel_fbdev.c
intel_fifo_underrun.c drm/i915: Always use intel_get_crtc_for_pipe() 2016-11-01 16:40:38 +02:00
intel_frontbuffer.c
intel_frontbuffer.h
intel_guc.h drm/i915/guc: Cache the client mapping 2016-11-03 19:57:43 +00:00
intel_guc_fwif.h drm/i915: Increase GuC log buffer size to reduce flush interrupts 2016-10-25 09:34:23 +01:00
intel_guc_loader.c drm/i915: Support for GuC interrupts 2016-10-25 09:34:06 +01:00
intel_gvt.c Documentation/gpu: Add section for Intel GVT-g host support 2016-10-20 17:18:39 +08:00
intel_gvt.h drm/i915/gvt: clean up intel_gvt.h as interface for i915 core 2016-10-20 17:18:30 +08:00
intel_hangcheck.c drm/i915: Move hangcheck code out from i915_irq.c 2016-11-02 11:59:10 +02:00
intel_hdmi.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_hotplug.c
intel_i2c.c drm/i915: GMBUS don't need no forcewake 2016-10-17 14:26:42 +03:00
intel_lrc.c drm/i915: Make sure engines are idle during GPU idling in LR mode 2016-11-07 14:48:05 +02:00
intel_lrc.h drm/i915: Make sure engines are idle during GPU idling in LR mode 2016-11-07 14:48:05 +02:00
intel_lspcon.c drm/i915/lspcon: Add workaround for resuming in PCON mode 2016-10-26 12:41:01 +03:00
intel_lvds.c drm/i915: Pass dev_priv to intel_get_crtc_for_pipe() 2016-11-01 16:40:38 +02:00
intel_mocs.c
intel_mocs.h
intel_modes.c
intel_opregion.c
intel_overlay.c drm/i915: Use lockless object free 2016-10-28 20:53:50 +01:00
intel_panel.c drm/i915/backlight: setup backlight pwm alternate increment on backlight enable 2016-10-10 16:05:52 +03:00
intel_pm.c drm/i915: Pass dev_priv to intel_init_pm() 2016-11-01 16:40:38 +02:00
intel_psr.c drm/i915: Make IS_CHERRYVIEW only take dev_priv 2016-10-14 12:23:19 +01:00
intel_renderstate.h
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_ringbuffer.c drm/i915: Export a function to flush the context upon pinning 2016-11-01 14:26:33 +00:00
intel_ringbuffer.h drm/i915: Spin until breadcrumb threads are complete 2016-11-09 15:01:52 +00:00
intel_runtime_pm.c drm/i915: Pass dev_priv to .get_display_clock_speed() 2016-11-01 16:40:38 +02:00
intel_sdvo.c drm/i915: Pass dev_priv to IS_MOBILE() 2016-11-01 16:40:38 +02:00
intel_sdvo_regs.h
intel_sideband.c
intel_sprite.c drm/i915: Grab the rotation from the passed plane state for VLV sprites 2016-11-08 15:38:25 +02:00
intel_tv.c drm/i915: Pass dev_priv to intel_wait_for_vblank() 2016-11-01 16:40:38 +02:00
intel_uncore.c drm/i915: Just clear the mmiodebug before a register access 2016-10-10 16:06:41 +03:00
intel_vbt_defs.h
Kconfig Merge tag 'gvt-next-2016-10-27' of https://github.com/01org/gvt-linux into drm-intel-next-queued 2016-10-27 10:33:17 +02:00
Kconfig.debug
Makefile drm/i915: Move hangcheck code out from i915_irq.c 2016-11-02 11:59:10 +02:00