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a446ae2c6e
linux_dsm_epyc7002/drivers/gpu/drm
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Lionel Landwerlin a446ae2c6e drm/i915: add query uAPI 
There are a number of information that are readable from hardware
registers and that we would like to make accessible to userspace. One
particular example is the topology of the execution units (how are
execution units grouped in subslices and slices and also which ones
have been fused off for die recovery).

At the moment the GET_PARAM ioctl covers some basic needs, but
generally is only able to return a single value for each defined
parameter. This is a bit problematic with topology descriptions which
are array/maps of available units.

This change introduces a new ioctl that can deal with requests to fill
structures of potentially variable lengths. The user is expected fill
a query with length fields set at 0 on the first call, the kernel then
sets the length fields to the their expected values. A second call to
the kernel with length fields at their expected values will trigger a
copy of the data to the pointed memory locations.

The scope of this uAPI is only to provide information to userspace,
not to allow configuration of the device.

v2: Simplify dispatcher code iteration (Tvrtko)
    Tweak uapi drm_i915_query_item structure (Tvrtko)

v3: Rename pad fields into flags (Chris)
    Return error on flags field != 0 (Chris)
    Only copy length back to userspace in drm_i915_query_item (Chris)

v4: Use array of functions instead of switch (Chris)

v5: More comments in uapi (Tvrtko)
    Return query item errors in length field (All)

v6: Tweak uapi comments style to match the coding style (Lionel)

v7: Add i915_query.h (Joonas)

v8: (Lionel) Change the behavior of the item iterator to report
    invalid queries into the query item rather than stopping the
    iteration. This enables userspace applications to query newer
    items on older kernels and only have failure on the items that are
    not supported.

v9: Edit copyright headers (Joonas)

v10: Typos & comments in uapi (Joonas)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180306122857.27317-6-lionel.g.landwerlin@intel.com
2018-03-08 10:07:18 +00:00
..
amd Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2018-03-01 14:07:22 +10:00
arc drm/arcpgu: remove drm_encoder_slave 2018-01-30 18:05:25 +01:00
arm drm/arm/mali-dp: Use drm_mode_get_hv_timing() to populate plane clip rectangle 2018-01-23 17:41:36 +02:00
armada Merge branch 'drm-armada-devel-4.15' of git://git.armlinux.org.uk/~rmk/linux-arm into drm-next 2018-01-05 09:51:43 +10:00
ast drm/ast: Load lut in crtc_commit 2018-02-01 11:35:46 +10:00
atmel-hlcdc drm/atmel-hlcdc: Use the alpha format field in drm_format_info 2018-01-29 12:08:37 +01:00
bochs drm/bochs: make structure bochs_bo_driver static 2018-02-19 10:43:44 +01:00
bridge drm/bridge/synopsys: dw-hdmi: don't clobber drvdata 2018-02-16 09:33:07 +01:00
cirrus drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
etnaviv drm/etnaviv: use memset32 to init pagetable 2018-01-02 17:36:53 +01:00
exynos drm/atmel-exynos: Use the alpha format field in drm_format_info 2018-01-29 12:08:42 +01:00
fsl-dcu drm/fsl-dcu: Use drm_mode_config_helper_suspend/resume() 2017-12-05 13:46:41 +01:00
gma500 pci-v4.16-changes 2018-02-06 09:59:40 -08:00
hisilicon drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
i2c drm/i2c: tda998x: Remove duplicate NULL check 2018-01-18 16:24:38 +02:00
i810
i915 drm/i915: add query uAPI 2018-03-08 10:07:18 +00:00
imx drm/bridge/synopsys: dw-hdmi: don't clobber drvdata 2018-02-16 09:33:07 +01:00
lib License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mediatek drm/mediatek: Use drm_mode_get_hv_timing() to populate plane clip rectangle 2018-01-23 17:41:45 +02:00
meson drm/bridge/synopsys: dw-hdmi: don't clobber drvdata 2018-02-16 09:33:07 +01:00
mga
mgag200 drm/mgag200: fix a test in mga_vga_mode_valid() 2018-01-30 18:05:25 +01:00
msm drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
mxsfb drm/mxsfb: Use drm_gem_fb_create() and drm_gem_fb_prepare_fb() 2017-10-01 17:02:20 +02:00
nouveau drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
omapdrm drm/omapdrm: Use of_find_backlight helper 2018-02-20 11:07:22 -05:00
panel drm/panel: Use of_find_backlight helper 2018-02-20 11:07:22 -05:00
pl111 drm/pl111: Support multiple endpoints on the CLCD 2018-02-07 09:08:51 +01:00
qxl drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
r128 r128: don't open-code memdup_user() 2017-12-27 19:00:09 -05:00
radeon Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2018-03-01 14:07:22 +10:00
rcar-du drm-misc-next for 4.17: 2018-02-23 11:12:52 +10:00
rockchip drm/rockchip: Respect page offset for PRIME mmap calls 2018-02-18 11:16:55 +01:00
savage
scheduler drm: Fix trailing semicolon 2018-02-19 14:19:04 -05:00
selftests Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
shmobile main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
sis
sti drm/sti: Use drm_fb_cma_fbdev_init/fini() 2017-12-08 14:47:41 +01:00
stm drm/stm: ltdc: remove non-alpha color formats on layer 2 for older hw 2018-02-08 10:23:32 +01:00
sun4i Merge airlied/drm-next into drm-misc-next 2018-02-16 15:47:43 -05:00
tdfx
tegra Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2018-03-01 14:07:22 +10:00
tilcdc drm/tilcdc: tilcdc_panel: Rename device from "panel" to "tilcdc-panel" 2018-02-28 11:48:25 +02:00
tinydrm drm/tinydrm: Call devres version of of_find_backlight 2018-02-20 11:07:22 -05:00
ttm drm/ttm: add ttm_tt_populate wrapper 2018-02-19 14:19:52 -05:00
tve200 drm/tve200: Use drm_fb_cma_fbdev_init/fini() 2017-12-08 14:47:42 +01:00
udl Merge tag 'drm-misc-next-2017-10-20' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-10-24 16:51:05 +10:00
vc4 drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
vgem treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
via Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
virtio drm/virtio: Don't return invalid caps on timeout 2018-02-01 17:45:41 +01:00
vmwgfx drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
zte drm/zte: Use drm_mode_get_hv_timing() to populate plane clip rectangle 2018-01-23 17:59:14 +02:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c drm/atomic: Fix memleak on ERESTARTSYS during non-blocking commits 2018-01-30 11:27:26 +01:00
drm_atomic.c Add HDCP support to i915 drm driver. 2018-02-16 09:36:04 +10:00
drm_auth.c drm: Check for lessee in DROP_MASTER ioctl 2018-01-31 09:27:51 +01:00
drm_blend.c drm/docs: Align layout of optional plane blending properties 2018-02-20 12:10:46 +01:00
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_color_mgmt.c drm: Pass struct drm_file * to __drm_mode_object_find [v2] 2017-10-12 10:03:04 +10:00
drm_connector.c drm/docs: Document "scaling mode" property better 2018-02-20 12:10:46 +01:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c drm: Replace kzalloc with kcalloc 2017-10-13 15:49:03 -04:00
drm_crtc_internal.h drm: rework delayed connector cleanup in connector_iter 2017-12-13 22:59:00 +01:00
drm_crtc.c drm/modes: Provide global mode_valid hook 2018-01-29 21:51:51 +02:00
drm_debugfs_crc.c drm/crc: Add support for polling on the data fd. 2018-02-05 13:22:44 +01:00
drm_debugfs.c drm/debugfs: Fix framebuffer debugfs file init 2017-11-14 11:08:17 +02:00
drm_dma.c
drm_dp_aux_dev.c Pass mode to wait_on_atomic_t() action funcs and provide default actions 2017-11-13 15:38:16 +00:00
drm_dp_dual_mode_helper.c drm: Add retries for lspcon mode detection 2017-10-13 12:13:54 +03:00
drm_dp_helper.c drm/dp: Add HBR3 support in existing DRM DP helpers 2018-01-26 13:36:53 +02:00
drm_dp_mst_topology.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-02-19 12:58:20 +01:00
drm_drv.c Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-02-19 13:01:20 +01:00
drm_encoder_slave.c
drm_encoder.c drm: Warn if plane/crtc/encoder/connector index exceeds our 32bit bitmasks 2018-01-29 18:46:53 +02:00
drm_fb_cma_helper.c drm/cma-helper: Add drm_fb_cma_fbdev_init/fini() 2017-12-08 14:27:47 +01:00
drm_fb_helper.c drm/framebuffer: Print task that allocated the fb in debug info. 2017-12-20 15:30:17 +01:00
drm_file.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
drm_flip_work.c
drm_fourcc.c drm/fourcc: Add a alpha field to drm_format_info 2018-01-29 12:07:47 +01:00
drm_framebuffer.c drm/framebuffer: Print task that allocated the fb in debug info. 2017-12-20 15:30:17 +01:00
drm_gem_cma_helper.c drm: gem_cma_helper.c: Allow importing of contiguous scatterlists with nents > 1 2017-11-15 18:14:46 +01:00
drm_gem_framebuffer_helper.c drm/gem-fb-helper: drm_gem_fbdev_fb_create() make funcs optional 2017-12-08 14:26:00 +01:00
drm_gem.c drm: Use idr_init_base(1) when using id==0 for invalid 2018-02-19 12:21:24 +00:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_ioc32.c
drm_ioctl.c drm: Print the pid when debug logging an ioctl error. 2018-02-10 22:23:10 +00:00
drm_irq.c
drm_kms_helper_common.c
drm_lease.c drm: Fix kerneldoc warnings for drm_lease 2018-02-19 10:49:59 +01:00
drm_legacy.h
drm_lock.c
drm_memory.c drm: add func to get max iomem address v2 2018-02-13 11:57:59 -05:00
drm_mipi_dsi.c drm/dsi: Fix improper use of mipi_dsi_device_transfer() return value 2018-01-16 17:10:14 -05:00
drm_mm.c Linux 4.15-rc4 2017-12-19 21:37:24 +10:00
drm_mode_config.c Linux 4.15-rc4 2017-12-19 21:37:24 +10:00
drm_mode_object.c drm/mode_object: fix documentation for object lookups. 2017-11-10 13:50:47 +10:00
drm_modes.c drm/doc: Polish for drm_mode_parse_command_line_for_connector 2018-02-20 12:10:46 +01:00
drm_modeset_helper.c drm/modeset-helper: Add simple modeset suspend/resume helpers 2017-11-30 18:18:08 +01:00
drm_modeset_lock.c drm: Require __GFP_NOFAIL for the legacy drm_modeset_lock_all 2017-10-31 17:36:46 +01:00
drm_of.c drm/drm_of: Move drm_of_panel_bridge_remove_function into header. 2017-10-13 16:59:36 +02:00
drm_panel_orientation_quirks.c drm: fix tainted kernel caused by drm_panel_orientation_quirks.c 2017-12-23 20:06:45 +01:00
drm_panel.c
drm_pci.c drm/core: clean up references to drm_dev_unref() 2017-09-27 10:53:12 +02:00
drm_plane_helper.c drm: Move drm_plane_helper_check_state() into drm_atomic_helper.c 2017-11-20 21:14:22 +02:00
drm_plane.c Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2018-03-01 14:07:22 +10:00
drm_prime.c drm: add kernel doc for exported gem dmabuf_ops 2018-01-19 11:14:59 -05:00
drm_print.c drm/printer: Add drm_vprintf() 2017-11-23 12:31:49 +02:00
drm_probe_helper.c drm/modes: Provide global mode_valid hook 2018-01-29 21:51:51 +02:00
drm_property.c drm: Pass struct drm_file * to __drm_mode_object_find [v2] 2017-10-12 10:03:04 +10:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c Merge tag 'drm-misc-next-2017-09-20' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-09-28 05:46:15 +10:00
drm_simple_kms_helper.c drm: simple_kms_helper: Add mode_valid() callback support 2018-02-20 08:42:17 +01:00
drm_syncobj.c drm: Use idr_init_base(1) when using id==0 for invalid 2018-02-19 12:21:24 +00:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
drm_vblank.c drm/doc: Fix documentation for _vblank_restore(). 2018-02-21 19:29:06 +01:00
drm_vm.c
drm_vma_manager.c drm/drm_vma_manager.c: Remove useless goto statement 2017-11-02 10:44:08 +01:00
Kconfig Fixes for 4.16: 2018-01-25 11:42:25 +10:00
Makefile drm: fix gpu scheduler link order 2018-01-24 15:49:04 -05:00