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4977a287b9
Those two concepts are really separate. Since GuC is writing data into
its own buffer and we even provide a way for userspace to read directly
from it using i915_guc_log_dump debugfs, there's no real reason to tie
log level with relay creation.
Let's create a separate debugfs, giving userspace a way to create a
relay on demand, when it wants to read a continuous log rather than a
snapshot.
v2: Don't touch guc_log_level on relay creation error, adjust locking
after rebase, s/dev_priv/i915, pass guc to file->private_data (Sagar)
Use struct_mutex rather than runtime.lock for set_log_level
v3: Tidy ordering of definitions (Sagar)
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180319095348.9716-5-michal.winiarski@intel.com
72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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* Copyright © 2014-2017 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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*/
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#ifndef _INTEL_GUC_LOG_H_
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#define _INTEL_GUC_LOG_H_
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#include <linux/mutex.h>
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#include <linux/relay.h>
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#include <linux/workqueue.h>
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#include "intel_guc_fwif.h"
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struct intel_guc;
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/*
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* The first page is to save log buffer state. Allocate one
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* extra page for others in case for overlap
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*/
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#define GUC_LOG_SIZE ((1 + GUC_LOG_DPC_PAGES + 1 + GUC_LOG_ISR_PAGES + \
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1 + GUC_LOG_CRASH_PAGES + 1) << PAGE_SHIFT)
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struct intel_guc_log {
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u32 flags;
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struct i915_vma *vma;
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/* The runtime stuff gets created only when GuC logging gets enabled */
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struct {
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void *buf_addr;
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struct workqueue_struct *flush_wq;
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struct work_struct flush_work;
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struct rchan *relay_chan;
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struct mutex lock;
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} runtime;
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/* logging related stats */
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u32 capture_miss_count;
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u32 flush_interrupt_count;
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u32 prev_overflow_count[GUC_MAX_LOG_BUFFER];
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u32 total_overflow_count[GUC_MAX_LOG_BUFFER];
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u32 flush_count[GUC_MAX_LOG_BUFFER];
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};
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void intel_guc_log_init_early(struct intel_guc_log *log);
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int intel_guc_log_create(struct intel_guc_log *log);
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void intel_guc_log_destroy(struct intel_guc_log *log);
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int intel_guc_log_level_get(struct intel_guc_log *log);
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int intel_guc_log_level_set(struct intel_guc_log *log, u64 control_val);
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int intel_guc_log_relay_open(struct intel_guc_log *log);
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void intel_guc_log_relay_flush(struct intel_guc_log *log);
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void intel_guc_log_relay_close(struct intel_guc_log *log);
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#endif
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