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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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a761b8b00c
The correct format is not used and no attempt has been made to document the function arguments. Makes sense to just demote the header back down to a simple comment. Fixes the following W=1 warnings: drivers/misc/mic/cosm/cosm_debugfs.c:25: warning: Function parameter or member 's' not described in 'log_buf_show' drivers/misc/mic/cosm/cosm_debugfs.c:25: warning: Function parameter or member 'unused' not described in 'log_buf_show' drivers/misc/mic/cosm/cosm_debugfs.c:78: warning: Function parameter or member 's' not described in 'force_reset_show' drivers/misc/mic/cosm/cosm_debugfs.c:78: warning: Function parameter or member 'pos' not described in 'force_reset_show' Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20200701083118.45744-18-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* Intel MIC Coprocessor State Management (COSM) Driver
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*/
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include "cosm_main.h"
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/* Debugfs parent dir */
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static struct dentry *cosm_dbg;
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/*
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* log_buf_show - Display MIC kernel log buffer
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*
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* log_buf addr/len is read from System.map by user space
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* and populated in sysfs entries.
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*/
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static int log_buf_show(struct seq_file *s, void *unused)
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{
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void __iomem *log_buf_va;
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int __iomem *log_buf_len_va;
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struct cosm_device *cdev = s->private;
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void *kva;
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int size;
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u64 aper_offset;
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if (!cdev || !cdev->log_buf_addr || !cdev->log_buf_len)
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goto done;
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mutex_lock(&cdev->cosm_mutex);
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switch (cdev->state) {
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case MIC_BOOTING:
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case MIC_ONLINE:
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case MIC_SHUTTING_DOWN:
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break;
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default:
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goto unlock;
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}
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/*
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* Card kernel will never be relocated and any kernel text/data mapping
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* can be translated to phys address by subtracting __START_KERNEL_map.
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*/
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aper_offset = (u64)cdev->log_buf_len - __START_KERNEL_map;
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log_buf_len_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
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aper_offset = (u64)cdev->log_buf_addr - __START_KERNEL_map;
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log_buf_va = cdev->hw_ops->aper(cdev)->va + aper_offset;
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size = ioread32(log_buf_len_va);
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kva = kmalloc(size, GFP_KERNEL);
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if (!kva)
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goto unlock;
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memcpy_fromio(kva, log_buf_va, size);
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seq_write(s, kva, size);
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kfree(kva);
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unlock:
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mutex_unlock(&cdev->cosm_mutex);
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done:
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(log_buf);
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/*
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* force_reset_show - Force MIC reset
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*
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* Invokes the force_reset COSM bus op instead of the standard reset
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* op in case a force reset of the MIC device is required
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*/
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static int force_reset_show(struct seq_file *s, void *pos)
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{
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struct cosm_device *cdev = s->private;
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cosm_stop(cdev, true);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(force_reset);
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void cosm_create_debug_dir(struct cosm_device *cdev)
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{
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char name[16];
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if (!cosm_dbg)
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return;
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scnprintf(name, sizeof(name), "mic%d", cdev->index);
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cdev->dbg_dir = debugfs_create_dir(name, cosm_dbg);
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debugfs_create_file("log_buf", 0444, cdev->dbg_dir, cdev,
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&log_buf_fops);
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debugfs_create_file("force_reset", 0444, cdev->dbg_dir, cdev,
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&force_reset_fops);
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}
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void cosm_delete_debug_dir(struct cosm_device *cdev)
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{
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debugfs_remove_recursive(cdev->dbg_dir);
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}
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void cosm_init_debugfs(void)
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{
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cosm_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
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}
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void cosm_exit_debugfs(void)
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{
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debugfs_remove(cosm_dbg);
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}
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