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Delete one "empty" kernel-doc line to eliminate a warning:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_merge3d.h:14 Cannot find
identifier on line: *
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695673/
Link: https://lore.kernel.org/r/20251219184638.1813181-11-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct or add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:27 Cannot find
identifier on line: *
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:52 Incorrect use of
kernel-doc format: * Clear layer mixer to pipe configuration
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:59 Incorrect use of
kernel-doc format: * Configure layer mixer to pipe configuration
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:69 Incorrect use of
kernel-doc format: * setup_border_color : enable/disable border color
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:76 Incorrect use of
kernel-doc format: * setup_misr: Enable/disable MISR
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:81 Incorrect use of
kernel-doc format: * collect_misr: Read MISR signature
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_mixer_out' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_blend_config' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_alpha_out' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'clear_all_blendstages' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_blendstage' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_border_color' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'setup_misr' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
'collect_misr' not described in 'dpu_hw_lm_ops'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695648/
Link: https://lore.kernel.org/r/20251219184638.1813181-10-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct or add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:76 duplicate section
name 'Return'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:112 Incorrect use of
kernel-doc format: * Disable autorefresh if enabled
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'setup_timing_gen' not described in 'dpu_hw_intf_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'setup_prg_fetch' not described in 'dpu_hw_intf_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'enable_timing' not described in 'dpu_hw_intf_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'get_status' not described in 'dpu_hw_intf_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'get_line_count' not described in 'dpu_hw_intf_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h:118 struct member
'disable_autorefresh' not described in 'dpu_hw_intf_ops'
dpu_hw_intf.h:119: warning: Excess struct member 'get_vsync_info'
description in 'dpu_hw_intf_ops'
dpu_hw_intf.h:119: warning: Excess struct member 'setup_autorefresh'
description in 'dpu_hw_intf_ops'
dpu_hw_intf.h:119: warning: Excess struct member 'get_autorefresh'
description in 'dpu_hw_intf_ops'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695646/
Link: https://lore.kernel.org/r/20251219184638.1813181-9-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct or add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:33 expecting prototype
for struct dpu_hw_pcc. Prototype was for struct dpu_hw_pcc_cfg instead
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:42 Incorrect use of
kernel-doc format: * setup_pcc - setup dspp pcc
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:48 struct member
'setup_pcc' not described in 'dpu_hw_dspp_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:76 expecting prototype
for dpu_hw_dspp(). Prototype was for to_dpu_hw_dspp() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695652/
Link: https://lore.kernel.org/r/20251219184638.1813181-8-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct or add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:23 Incorrect use of
kernel-doc format: * dsc_disable - disable dsc
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:29 Incorrect use of
kernel-doc format: * dsc_config - configures dsc encoder
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:41 Incorrect use of
kernel-doc format: * dsc_config_thresh - programs panel thresholds
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:50 struct member
'dsc_disable' not described in 'dpu_hw_dsc_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:50 struct member
'dsc_config' not described in 'dpu_hw_dsc_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:50 struct member
'dsc_config_thresh' not described in 'dpu_hw_dsc_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.h:50 struct member
'dsc_bind_pingpong_blk' not described in 'dpu_hw_dsc_ops'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695658/
Link: https://lore.kernel.org/r/20251219184638.1813181-7-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct or add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h:30 Cannot find
identifier on line: *
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h:61 expecting prototype
for dpu_hw_cwb(). Prototype was for to_dpu_hw_cwb() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695664/
Link: https://lore.kernel.org/r/20251219184638.1813181-6-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct and add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:18 cannot understand
function prototype: 'enum dpu_ctl_mode_sel'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:58 struct member 'wb'
not described in 'dpu_hw_intf_cfg'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:66 Incorrect use of
kernel-doc format: * kickoff hw operation for Sw controlled interfaces
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:73 Incorrect use of
kernel-doc format: * check if the ctl is started
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:80 Incorrect use of
kernel-doc format: * kickoff prepare is in progress hw operation for sw
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:88 Incorrect use of
kernel-doc format: * Clear the value of the cached pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:96 Incorrect use of
kernel-doc format: * Query the value of the cached pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:103 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:112 Incorrect use of
kernel-doc format: * OR in the given flushbits to the
cached pending_(wb_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:121 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(cwb_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:130 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(intf_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:139 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(periph_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:148 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(merge_3d_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:157 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:166 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:175 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:185 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(dsc_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:194 Incorrect use of
kernel-doc format: * OR in the given flushbits to the cached
pending_(cdm_)flush_mask
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:202 Incorrect use of
kernel-doc format: * Write the value of the pending_flush_mask to hardware
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:208 Incorrect use of
kernel-doc format: * Read the value of the flush register
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:215 Incorrect use of
kernel-doc format: * Setup ctl_path interface config
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:223 Incorrect use of
kernel-doc format: * reset ctl_path interface config
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:244 Incorrect use of
kernel-doc format: * Set all blend stages to disabled
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:250 Incorrect use of
kernel-doc format: * Configure layer mixer to pipe configuration
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:262 Incorrect use of
kernel-doc format: * Set active pipes attached to this CTL
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:270 Incorrect use of
kernel-doc format: * Set active layer mixers attached to this CTL
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:277 struct member
'trigger_start' not described in 'dpu_hw_ctl_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:277 struct member
'is_started' not described in 'dpu_hw_ctl_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:277 struct member
'trigger_pending' not described in 'dpu_hw_ctl_ops'
[many here]
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:319 struct member
'pending_periph_flush_mask' not described in 'dpu_hw_ctl'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:319 struct member
'pending_merge_3d_flush_mask' not described in 'dpu_hw_ctl'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:319 struct member
'pending_dspp_flush_mask' not described in 'dpu_hw_ctl'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h:327 expecting
prototype for dpu_hw_ctl(). Prototype was for to_dpu_hw_ctl() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695649/
Link: https://lore.kernel.org/r/20251219184638.1813181-5-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct and add kernel-doc comments to eliminate all warnings:
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cdm.h:91 Incorrect use of
kernel-doc format: * Enable the CDM module
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cdm.h:97 Incorrect use of
kernel-doc format: * Enable/disable the connection with pingpong
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695651/
Link: https://lore.kernel.org/r/20251219184638.1813181-4-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct and add kernel-doc comments to eliminate all warnings:
Warning: ../drivers/gpu/drm/msm/dp/dp_debug.h:31 expecting prototype for
msm_dp_debug_get(). Prototype was for msm_dp_debug_init() instead
Warning: ../drivers/gpu/drm/msm/dp/dp_drm.c:24 function parameter
'connector' not described in 'msm_dp_bridge_detect'
Warning: ../drivers/gpu/drm/msm/dp/dp_link.h:90 expecting prototype for
mdss_dp_test_bit_depth_to_bpp(). Prototype was for
msm_dp_link_bit_depth_to_bpp() instead
Warning: ../drivers/gpu/drm/msm/dp/dp_link.h:126 function parameter
'aux' not described in 'msm_dp_link_get'
Warning: ../drivers/gpu/drm/msm/dp/dp_link.h:126 function parameter
'dev' not described in 'msm_dp_link_get'
Warning: ../drivers/gpu/drm/msm/dp/dp_panel.h:70 function parameter
'bw_code' not described in 'is_link_rate_valid'
Warning: ../drivers/gpu/drm/msm/dp/dp_panel.h:84 expecting prototype for
msm_dp_link_is_lane_count_valid(). Prototype was for
is_lane_count_valid() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695647/
Link: https://lore.kernel.org/r/20251219184638.1813181-3-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Correct and add kernel-doc comments to eliminate all warnings:
Warning: ../drivers/gpu/drm/msm/disp/mdp_format.h:27 This comment starts
with '/**', but isn't a kernel-doc comment.
Warning: ../drivers/gpu/drm/msm/disp/mdp_format.h:64 struct member
'bpc_a' not described in 'msm_format'
Warning: ../drivers/gpu/drm/msm/disp/mdp_format.h:64 struct member
'bpc_b_cb' not described in 'msm_format'
Warning: ../drivers/gpu/drm/msm/disp/mdp_format.h:64 struct member
'bpc_g_y' not described in 'msm_format'
Warning: ../drivers/gpu/drm/msm/disp/mdp_format.h:64 struct member
'bpc_r_cr' not described in 'msm_format'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695650/
Link: https://lore.kernel.org/r/20251219184638.1813181-2-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Use the consolidated HDMI tables before we try to compute them via
algorithm. The reason is that these are the ideal values and even
though the values calculated via the HDMI algorithm are correct but
not always ideal. This is done for C20 and already exists for C10.
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20251223063422.1444968-1-suraj.kandpal@intel.com
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Use READ_ONCE and WRITE_ONCE when operating on ct->state
to prevent the compiler form ignoring important modifications
to its value.
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251222201957.63245-6-jonathan.cavitt@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Use READ_ONCE and WRITE_ONCE when operating on g2h_fence->done
to prevent the compiler from ignoring important modifications
to its value.
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251222201957.63245-5-jonathan.cavitt@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Define system controller config bits and helpers for SoC remapper.
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patch.msgid.link/20251223183943.3175941-8-umesh.nerlige.ramappa@intel.com
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Since different drivers can use SoC remapper, modify VSEC code to
access SoC remapper via a helper that would synchronize such accesses.
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patch.msgid.link/20251223183943.3175941-7-umesh.nerlige.ramappa@intel.com
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SoC remapper is used to map different HW functions in the SoC to their
respective drivers. Initialize SoC remapper during driver load.
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patch.msgid.link/20251223183943.3175941-6-umesh.nerlige.ramappa@intel.com
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Building the XE driver through Yocto throws this QA warning:
WARNING: mc:house:linux-stable-6.17-r0 do_package_qa: QA Issue: File /usr/src/debug/linux-stable/6.17/drivers/gpu/drm/xe/generated/xe_device_wa_oob.h in package linux-stable-src contains reference to TMPDIR [buildpaths]
WARNING: mc:house:linux-stable-6.17-r0 do_package_qa: QA Issue: File /usr/src/debug/linux-stable/6.17/drivers/gpu/drm/xe/generated/xe_wa_oob.h in package linux-stable-src contains reference to TMPDIR [buildpaths]
...because the comment at the top of the generated header contains the
absolute path to the rules file at build time:
* This file was generated from rules: /home/calvinow/git/meta-house/build/tmp-house/work-shared/nuc14rvhu7/kernel-source/drivers/gpu/drm/xe/xe_device_wa_oob.rules
Fix this minor annoyance by putting the basename of the rules file in
the generated comment instead of the absolute path, so the generated
header contents no longer depend on the location of the kernel source.
Signed-off-by: Calvin Owens <calvin@wbinvd.org>
Link: https://patch.msgid.link/20251222165441.516102-2-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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Commit 5488bec96bcc ("drm/xe/uapi: Use hint for guc to set GT frequency")
introduced low latency hint for use by user space when creating an exec
queue. This instructs SLPC to ramp the GT frequency aggressively.
SVM relies on an internal exec queue to migrate memory upon page faults.
This change creates this exec queue with the low latency hint to speed up
migration.
This should not impact systems where GT frequency is set over sysfs, or
with long running workloads which give enough time for the frequency to
ramp up. An example of memory access pattern that shows an improvement of
SVM performance is running hundreds of times IGT eu-fault-2m-once-device
in xe_exec_system_allocator. The copy duration provided by GT stats in
svm_2M_device_copy_us shows per GPU page fault:
~ 165 μs without low latency hint
~ 130 μs with low latency hint
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Link: https://patch.msgid.link/20251223115327.49555-1-francois.dugast@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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In situations where no system memory is migrated to devmem, and in
upcoming patches where another GPU is performing the migration to
the newly allocated devmem buffer, there is nothing to ensure any
ongoing clear to the devmem allocation or async eviction from the
devmem allocation is complete.
Address that by passing a struct dma_fence down to the copy
functions, and ensure it is waited for before migration is marked
complete.
v3:
- New patch.
v4:
- Update the logic used for determining when to wait for the
pre_migrate_fence.
- Update the logic used for determining when to warn for the
pre_migrate_fence since the scheduler fences apparently
can signal out-of-order.
v5:
- Fix a UAF (CI)
- Remove references to source P2P migration (Himal)
- Put the pre_migrate_fence after migration.
v6:
- Pipeline the pre_migrate_fence dependency (Matt Brost)
Fixes: c5b3eb5a906c ("drm/xe: Add GPUSVM device memory copy vfunc functions")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org> # v6.15+
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-4-thomas.hellstrom@linux.intel.com
(cherry picked from commit 16b5ad31952476fb925c401897fc171cd37f536b)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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Avoid spamming the log with drm_info(). Use drm_dbg() instead.
Fixes: cc795e041034 ("drm/xe/svm: Make xe_svm_range_needs_migrate_to_vram() public")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: <stable@vger.kernel.org> # v6.17+
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-2-thomas.hellstrom@linux.intel.com
(cherry picked from commit 72aee5f70ba47b939345a0d3414b51b0639c5b88)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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Introduce an rw-semaphore to serialize migration to device if
it's likely that migration races with another device migration
of the same CPU address space range.
This is a temporary fix to attempt to mitigate a livelock that
might happen if many devices try to migrate a range at the same
time, and it affects only devices using the xe driver.
A longer term fix is probably improvements in the core mm
migration layer.
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-25-thomas.hellstrom@linux.intel.com
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Support source interconnect migration by using the copy_to_ram() op
of the source device private pages.
Source interconnect migration is required to flush the L2 cache of
the source device, which among other things is a requirement for
correct global atomic operation. It also enables the source GPU to
potentially decompress any compressed content which is not
understood by peers, and finally for the PCIe case, it's expected
that writes over PCIe will be faster than reads.
The implementation can probably be improved by coalescing subregions
with the same source.
v5:
- Update waiting for the pre_migrate_fence and comments around that,
previously in another patch. (Himal).
- Actually select device private pages to migrate when
source_peer_migrates is true.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-24-thomas.hellstrom@linux.intel.com
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Support destination migration over interconnect when migrating from
device-private pages with the same dev_pagemap owner.
Since we now also collect device-private pages to migrate,
also abort migration if the range to migrate is already
fully populated with pages from the desired pagemap.
Finally return -EBUSY from drm_pagemap_populate_mm()
if the migration can't be completed without first migrating all
pages in the range to system. It is expected that the caller
will perform that before retrying the call to
drm_pagemap_populate_mm().
v3:
- Fix a bug where the p2p dma-address was never used.
- Postpone enabling destination interconnect migration,
since xe devices require source interconnect migration to
ensure the source L2 cache is flushed at migration time.
- Update the drm_pagemap_migrate_to_devmem() interface to
pass migration details.
v4:
- Define XE_INTERCONNECT_P2P unconditionally (CI)
- Include a missing header (CI)
v5:
- Use page order increments where possible (Matt Brost).
- Fix a negated value of can_migrate_same_pagemap.
- Move removal of some dead code to a separate patch (Matt Brost).
- Remove an unnecessary zdd get() and put() (Matt Brost).
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-23-thomas.hellstrom@linux.intel.com
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Use drm_gpusvm_scan_mm() to avoid unnecessarily calling into
drm_pagemap_populate_mm();
v3:
- New patch.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-22-thomas.hellstrom@linux.intel.com
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With multi-device we are much more likely to have multiple
drm-gpusvm ranges pointing to the same struct mm range.
To avoid calling into drm_pagemap_populate_mm(), which is always
very costly, introduce a much less costly drm_gpusvm function,
drm_gpusvm_scan_mm() to scan the current migration state.
The device fault-handler and prefetcher can use this function to
determine whether migration is really necessary.
There are a couple of performance improvements that can be done
for this function if it turns out to be too costly. Those are
documented in the code.
v3:
- New patch.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-21-thomas.hellstrom@linux.intel.com
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Use the dev_pagemap->owner field wherever possible, simplifying
the code slightly.
v3: New patch
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-20-thomas.hellstrom@linux.intel.com
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As an aid to understanding the lifetime of the drm_pagemaps used
by the xe driver, document how the xe driver keeps the
drm_pagemap references.
v3:
- Fix formatting (Matt Brost)
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-19-thomas.hellstrom@linux.intel.com
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Add debug printouts that are valueable for pagemap prefetch,
migration and page collection.
v2:
- Add additional debug prinouts around migration and page collection.
- Require CONFIG_DRM_XE_DEBUG_VM.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> #v1
Link: https://patch.msgid.link/20251219113320.183860-18-thomas.hellstrom@linux.intel.com
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Mimic the dma-buf method using dma_[map|unmap]_resource to map
for pcie-p2p dma.
There's an ongoing area of work upstream to sort out how this best
should be done. One method proposed is to add an additional
pci_p2p_dma_pagemap aliasing the device_private pagemap and use
the corresponding pci_p2p_dma_pagemap page as input for
dma_map_page(). However, that would incur double the amount of
memory and latency to set up the drm_pagemap and given the huge
amount of memory present on modern GPUs, that would really not work.
Hence the simple approach used in this patch.
v2:
- Simplify xe_page_to_pcie(). (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-17-thomas.hellstrom@linux.intel.com
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placement for svm
Use device file descriptors and regions to represent pagemaps on
foreign or local devices.
The underlying files are type-checked at madvise time, and
references are kept on the drm_pagemap as long as there is are
madvises pointing to it.
Extend the madvise preferred_location UAPI to support the region
instance to identify the foreign placement.
v2:
- Improve UAPI documentation. (Matt Brost)
- Sanitize preferred_mem_loc.region_instance madvise. (Matt Brost)
- Clarify madvise drm_pagemap vs xe_pagemap refcounting. (Matt Brost)
- Don't allow a foreign drm_pagemap madvise without a fast
interconnect.
v3:
- Add a comment about reference-counting in xe_devmem_open() and
remove the reference-count get-and-put. (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-16-thomas.hellstrom@linux.intel.com
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Simplify madvise_preferred_mem_loc by removing repetitive patterns
in favour of local variables.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-15-thomas.hellstrom@linux.intel.com
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Honor the drm_pagemap vma attribute when migrating SVM pages.
Ensure that when the desired placement is validated as device
memory, that we also check that the requested drm_pagemap is
consistent with the current.
v2:
- Initialize a struct drm_pagemap pointer to NULL that could
otherwise be dereferenced uninitialized. (CI)
- Remove a redundant assignment (Matt Brost)
- Slightly improved commit message (Matt Brost)
- Extended drm_pagemap validation.
v3:
- Fix a compilation error if CONFIG_DRM_GPUSVM is not enabled.
(kernel test robot <lkp@intel.com>)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-14-thomas.hellstrom@linux.intel.com
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As a consequence, struct xe_vma_mem_attr() can't simply be assigned
or freed without taking the reference count of individual members
into account. Also add helpers to do that.
v2:
- Move some calls to xe_vma_mem_attr_fini() to xe_vma_free(). (Matt Brost)
v3:
- Rebase.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> #v2
Link: https://patch.msgid.link/20251219113320.183860-13-thomas.hellstrom@linux.intel.com
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Register a driver-wide owner list, provide a callback to identify
fast interconnects and use the drm_pagemap_util helper to allocate
or reuse a suitable owner struct. For now we consider pagemaps on
different tiles on the same device as having fast interconnect and
thus the same owner.
v2:
- Fix up the error onion unwind in xe_pagemap_create(). (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-12-thomas.hellstrom@linux.intel.com
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interconnected gpus
The hmm_range_fault() and the migration helpers currently need a common
"owner" to identify pagemaps and clients with fast interconnect.
Add a drm_pagemap utility to setup such owners by registering
drm_pagemaps, in a registry, and for each new drm_pagemap,
query which existing drm_pagemaps have fast interconnects with the new
drm_pagemap.
The "owner" scheme is limited in that it is static at drm_pagemap creation.
Ideally one would want the owner to be adjusted at run-time, but that
requires changes to hmm. If the proposed scheme becomes too limited,
we need to revisit.
v2:
- Improve documentation of DRM_PAGEMAP_OWNER_LIST_DEFINE(). (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-11-thomas.hellstrom@linux.intel.com
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With the drm_pagemap_init() interface, drm_pagemap_create() is not
used anymore.
v2:
- Slightly more verbose commit message. (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-10-thomas.hellstrom@linux.intel.com
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Define a struct xe_pagemap that embeds all pagemap-related
data used by xekmd, and use the drm_pagemap cache- and
shrinker to manage lifetime.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-9-thomas.hellstrom@linux.intel.com
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Pagemaps are costly to set up and tear down, and they consume a lot
of system memory for the struct pages. Ideally they should be
created only when needed.
Add a caching mechanism to allow doing just that: Create the drm_pagemaps
when needed for migration. Keep them around to avoid destruction and
re-creation latencies and destroy inactive/unused drm_pagemaps on memory
pressure using a shrinker.
Only add the helper functions. They will be hooked up to the xe driver
in the upcoming patch.
v2:
- Add lockdep checking for drm_pagemap_put(). (Matt Brost)
- Add a copyright notice. (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-8-thomas.hellstrom@linux.intel.com
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If a device holds a reference on a foregin device's drm_pagemap,
and a device unbind is executed on the foreign device,
Typically that foreign device would evict its device-private
pages and then continue its device-managed cleanup eventually
releasing its drm device and possibly allow for module unload.
However, since we're still holding a reference on a drm_pagemap,
when that reference is released and the provider module is
unloaded we'd execute out of undefined memory.
Therefore keep a reference on the provider device and module until
the last drm_pagemap reference is gone.
Note that in theory, the drm_gpusvm_helper module may be unloaded
as soon as the final module_put() of the provider driver module is
executed, so we need to add a module_exit() function that waits
for the work item executing the module_put() has completed.
v2:
- Better commit message (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-7-thomas.hellstrom@linux.intel.com
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To be able to keep track of drm_pagemap usage, add a refcounted
backpointer to struct drm_pagemap_zdd. This will keep the drm_pagemap
reference count from dropping to zero as long as there are drm_pagemap
pages present in a CPU address space.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-6-thomas.hellstrom@linux.intel.com
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With the end goal of being able to free unused pagemaps
and allocate them on demand, add a refcount to struct drm_pagemap,
remove the xe embedded drm_pagemap, allocating and freeing it
explicitly.
v2:
- Make the drm_pagemap pointer in drm_gpusvm_pages reference-counted.
v3:
- Call drm_pagemap_get() before drm_pagemap_put() in drm_gpusvm_pages
(Himal Prasad Ghimiray)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> #v1
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-5-thomas.hellstrom@linux.intel.com
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In situations where no system memory is migrated to devmem, and in
upcoming patches where another GPU is performing the migration to
the newly allocated devmem buffer, there is nothing to ensure any
ongoing clear to the devmem allocation or async eviction from the
devmem allocation is complete.
Address that by passing a struct dma_fence down to the copy
functions, and ensure it is waited for before migration is marked
complete.
v3:
- New patch.
v4:
- Update the logic used for determining when to wait for the
pre_migrate_fence.
- Update the logic used for determining when to warn for the
pre_migrate_fence since the scheduler fences apparently
can signal out-of-order.
v5:
- Fix a UAF (CI)
- Remove references to source P2P migration (Himal)
- Put the pre_migrate_fence after migration.
v6:
- Pipeline the pre_migrate_fence dependency (Matt Brost)
Fixes: c5b3eb5a906c ("drm/xe: Add GPUSVM device memory copy vfunc functions")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org> # v6.15+
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-4-thomas.hellstrom@linux.intel.com
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The page pointer can't be NULL.
v5:
- New patch. (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> # For merging through drm-xe.
Link: https://patch.msgid.link/20251219113320.183860-3-thomas.hellstrom@linux.intel.com
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Avoid spamming the log with drm_info(). Use drm_dbg() instead.
Fixes: cc795e041034 ("drm/xe/svm: Make xe_svm_range_needs_migrate_to_vram() public")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: <stable@vger.kernel.org> # v6.17+
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20251219113320.183860-2-thomas.hellstrom@linux.intel.com
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Debugfs files are added to allow a user to provide a comma-separated list
of values to assign to each group for each VF.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-26-daniele.ceraolospurio@intel.com
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The KLV to set the preemption timeout for each groups works the exact
same way as the one for the exec quantums, so we add similar functions.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-25-daniele.ceraolospurio@intel.com
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The GuC has a new dedicated KLV to set the EQs for the groups. The GuC
always sets the EQs for all the groups (even the ones not enabled). If
we provide fewer values than the max number of groups (8), the GuC will
set the remaining ones to 0 (infinity).
Note that the new KLV can be used even when groups are disabled (as the
GuC always consider group0 to be active), so we can use it when encoding
the SRIOV config.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-24-daniele.ceraolospurio@intel.com
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Each scheduler group can be independently configured with its own exec
quantum and preemption timeouts. The existing KLVs to configure those
parameters will apply the value to all groups (even if they're not
enabled at the moment).
When scheduler groups are disabled, the GuC uses the values from Group 0.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-23-daniele.ceraolospurio@intel.com
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Under a new subfolder, an entry is created for each group to list the
engines assigned to them. We create enough entries for each possible
group, with the disabled groups just returning an empty list.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-22-daniele.ceraolospurio@intel.com
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Reading the debugfs file lists the available configurations by name.
Writing the name of a configuration to the file will enable it.
Note that while this debugfs is PF-only, follow up patches will add some
debugfs files that are applicable to VF as well, so the function accepts
a vfid parameter to be ready for that.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251218223846.1146344-21-daniele.ceraolospurio@intel.com
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