609 lines
15 KiB
C
609 lines
15 KiB
C
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/*
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* Linux network driver for Brocade Converged Network Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/*
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* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include "bnad.h"
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/*
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* BNA debufs interface
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*
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* To access the interface, debugfs file system should be mounted
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* if not already mounted using:
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* mount -t debugfs none /sys/kernel/debug
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*
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* BNA Hierarchy:
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* - bna/pci_dev:<pci_name>
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* where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
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*
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* Debugging service available per pci_dev:
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* fwtrc: To collect current firmware trace.
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* fwsave: To collect last saved fw trace as a result of firmware crash.
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* regwr: To write one word to chip register
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* regrd: To read one or more words from chip register.
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*/
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struct bnad_debug_info {
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char *debug_buffer;
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void *i_private;
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int buffer_len;
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};
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static int
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bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
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{
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struct bnad *bnad = inode->i_private;
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struct bnad_debug_info *fw_debug;
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unsigned long flags;
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int rc;
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fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
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if (!fw_debug)
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return -ENOMEM;
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fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
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fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
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if (!fw_debug->debug_buffer) {
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kfree(fw_debug);
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fw_debug = NULL;
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return -ENOMEM;
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}
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spin_lock_irqsave(&bnad->bna_lock, flags);
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rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
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fw_debug->debug_buffer,
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&fw_debug->buffer_len);
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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if (rc != BFA_STATUS_OK) {
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kfree(fw_debug->debug_buffer);
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fw_debug->debug_buffer = NULL;
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kfree(fw_debug);
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fw_debug = NULL;
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pr_warn("bnad %s: Failed to collect fwtrc\n",
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pci_name(bnad->pcidev));
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return -ENOMEM;
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}
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file->private_data = fw_debug;
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return 0;
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}
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static int
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bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
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{
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struct bnad *bnad = inode->i_private;
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struct bnad_debug_info *fw_debug;
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unsigned long flags;
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int rc;
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fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
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if (!fw_debug)
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return -ENOMEM;
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fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
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fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
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if (!fw_debug->debug_buffer) {
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kfree(fw_debug);
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fw_debug = NULL;
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return -ENOMEM;
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}
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spin_lock_irqsave(&bnad->bna_lock, flags);
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rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
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fw_debug->debug_buffer,
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&fw_debug->buffer_len);
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
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kfree(fw_debug->debug_buffer);
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fw_debug->debug_buffer = NULL;
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kfree(fw_debug);
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fw_debug = NULL;
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pr_warn("bna %s: Failed to collect fwsave\n",
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pci_name(bnad->pcidev));
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return -ENOMEM;
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}
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file->private_data = fw_debug;
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return 0;
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}
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static int
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bnad_debugfs_open_reg(struct inode *inode, struct file *file)
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{
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struct bnad_debug_info *reg_debug;
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reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
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if (!reg_debug)
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return -ENOMEM;
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reg_debug->i_private = inode->i_private;
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file->private_data = reg_debug;
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return 0;
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}
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static int
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bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
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{
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struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
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struct bnad_iocmd_comp fcomp;
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unsigned long flags = 0;
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int ret = BFA_STATUS_FAILED;
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/* Get IOC info */
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spin_lock_irqsave(&bnad->bna_lock, flags);
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bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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/* Retrieve CEE related info */
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fcomp.bnad = bnad;
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fcomp.comp_status = 0;
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init_completion(&fcomp.comp);
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spin_lock_irqsave(&bnad->bna_lock, flags);
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ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
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bnad_cb_completion, &fcomp);
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if (ret != BFA_STATUS_OK) {
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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goto out;
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}
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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wait_for_completion(&fcomp.comp);
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drvinfo->cee_status = fcomp.comp_status;
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/* Retrieve flash partition info */
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fcomp.comp_status = 0;
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init_completion(&fcomp.comp);
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spin_lock_irqsave(&bnad->bna_lock, flags);
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ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
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bnad_cb_completion, &fcomp);
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if (ret != BFA_STATUS_OK) {
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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goto out;
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}
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spin_unlock_irqrestore(&bnad->bna_lock, flags);
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wait_for_completion(&fcomp.comp);
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drvinfo->flash_status = fcomp.comp_status;
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out:
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return ret;
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}
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static int
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bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
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{
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struct bnad *bnad = inode->i_private;
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struct bnad_debug_info *drv_info;
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int rc;
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drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
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if (!drv_info)
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return -ENOMEM;
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drv_info->buffer_len = sizeof(struct bnad_drvinfo);
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drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
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if (!drv_info->debug_buffer) {
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kfree(drv_info);
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drv_info = NULL;
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return -ENOMEM;
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}
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mutex_lock(&bnad->conf_mutex);
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rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
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drv_info->buffer_len);
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mutex_unlock(&bnad->conf_mutex);
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if (rc != BFA_STATUS_OK) {
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kfree(drv_info->debug_buffer);
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drv_info->debug_buffer = NULL;
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kfree(drv_info);
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drv_info = NULL;
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pr_warn("bna %s: Failed to collect drvinfo\n",
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pci_name(bnad->pcidev));
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return -ENOMEM;
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}
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file->private_data = drv_info;
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return 0;
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}
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/* Changes the current file position */
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static loff_t
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bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
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{
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loff_t pos = file->f_pos;
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struct bnad_debug_info *debug = file->private_data;
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if (!debug)
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return -EINVAL;
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switch (orig) {
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case 0:
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file->f_pos = offset;
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break;
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case 1:
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file->f_pos += offset;
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break;
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case 2:
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file->f_pos = debug->buffer_len - offset;
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break;
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default:
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return -EINVAL;
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}
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if (file->f_pos < 0 || file->f_pos > debug->buffer_len) {
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file->f_pos = pos;
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return -EINVAL;
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}
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return file->f_pos;
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}
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static ssize_t
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bnad_debugfs_read(struct file *file, char __user *buf,
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size_t nbytes, loff_t *pos)
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{
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struct bnad_debug_info *debug = file->private_data;
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if (!debug || !debug->debug_buffer)
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return 0;
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return simple_read_from_buffer(buf, nbytes, pos,
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debug->debug_buffer, debug->buffer_len);
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}
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#define BFA_REG_CT_ADDRSZ (0x40000)
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#define BFA_REG_CB_ADDRSZ (0x20000)
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#define BFA_REG_ADDRSZ(__ioc) \
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((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \
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BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
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#define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1)
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/*
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* Function to check if the register offset passed is valid.
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*/
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static int
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bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
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{
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u8 area;
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/* check [16:15] */
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area = (offset >> 15) & 0x7;
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if (area == 0) {
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/* PCIe core register */
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if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */
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return BFA_STATUS_EINVAL;
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} else if (area == 0x1) {
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/* CB 32 KB memory page */
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if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */
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return BFA_STATUS_EINVAL;
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} else {
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/* CB register space 64KB */
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if ((offset + (len<<2)) > BFA_REG_ADDRMSK(ioc))
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return BFA_STATUS_EINVAL;
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}
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return BFA_STATUS_OK;
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}
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static ssize_t
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bnad_debugfs_read_regrd(struct file *file, char __user *buf,
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size_t nbytes, loff_t *pos)
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{
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struct bnad_debug_info *regrd_debug = file->private_data;
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struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
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ssize_t rc;
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if (!bnad->regdata)
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return 0;
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rc = simple_read_from_buffer(buf, nbytes, pos,
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bnad->regdata, bnad->reglen);
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if ((*pos + nbytes) >= bnad->reglen) {
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kfree(bnad->regdata);
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bnad->regdata = NULL;
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bnad->reglen = 0;
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}
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return rc;
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}
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static ssize_t
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bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
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size_t nbytes, loff_t *ppos)
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{
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struct bnad_debug_info *regrd_debug = file->private_data;
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struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
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struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
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int addr, len, rc, i;
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u32 *regbuf;
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void __iomem *rb, *reg_addr;
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unsigned long flags;
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void *kern_buf;
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/* Allocate memory to store the user space buf */
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kern_buf = kzalloc(nbytes, GFP_KERNEL);
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if (!kern_buf)
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return -ENOMEM;
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if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
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kfree(kern_buf);
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return -ENOMEM;
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}
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rc = sscanf(kern_buf, "%x:%x", &addr, &len);
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if (rc < 2) {
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pr_warn("bna %s: Failed to read user buffer\n",
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pci_name(bnad->pcidev));
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kfree(kern_buf);
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return -EINVAL;
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}
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kfree(kern_buf);
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kfree(bnad->regdata);
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bnad->regdata = NULL;
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bnad->reglen = 0;
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bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
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if (!bnad->regdata)
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return -ENOMEM;
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bnad->reglen = len << 2;
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rb = bfa_ioc_bar0(ioc);
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|
|
addr &= BFA_REG_ADDRMSK(ioc);
|
||
|
|
|
||
|
|
/* offset and len sanity check */
|
||
|
|
rc = bna_reg_offset_check(ioc, addr, len);
|
||
|
|
if (rc) {
|
||
|
|
pr_warn("bna %s: Failed reg offset check\n",
|
||
|
|
pci_name(bnad->pcidev));
|
||
|
|
kfree(bnad->regdata);
|
||
|
|
bnad->regdata = NULL;
|
||
|
|
bnad->reglen = 0;
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
reg_addr = rb + addr;
|
||
|
|
regbuf = (u32 *)bnad->regdata;
|
||
|
|
spin_lock_irqsave(&bnad->bna_lock, flags);
|
||
|
|
for (i = 0; i < len; i++) {
|
||
|
|
*regbuf = readl(reg_addr);
|
||
|
|
regbuf++;
|
||
|
|
reg_addr += sizeof(u32);
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&bnad->bna_lock, flags);
|
||
|
|
|
||
|
|
return nbytes;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t
|
||
|
|
bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
|
||
|
|
size_t nbytes, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct bnad_debug_info *debug = file->private_data;
|
||
|
|
struct bnad *bnad = (struct bnad *)debug->i_private;
|
||
|
|
struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
|
||
|
|
int addr, val, rc;
|
||
|
|
void __iomem *reg_addr;
|
||
|
|
unsigned long flags;
|
||
|
|
void *kern_buf;
|
||
|
|
|
||
|
|
/* Allocate memory to store the user space buf */
|
||
|
|
kern_buf = kzalloc(nbytes, GFP_KERNEL);
|
||
|
|
if (!kern_buf)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
|
||
|
|
kfree(kern_buf);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
rc = sscanf(kern_buf, "%x:%x", &addr, &val);
|
||
|
|
if (rc < 2) {
|
||
|
|
pr_warn("bna %s: Failed to read user buffer\n",
|
||
|
|
pci_name(bnad->pcidev));
|
||
|
|
kfree(kern_buf);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
kfree(kern_buf);
|
||
|
|
|
||
|
|
addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */
|
||
|
|
|
||
|
|
/* offset and len sanity check */
|
||
|
|
rc = bna_reg_offset_check(ioc, addr, 1);
|
||
|
|
if (rc) {
|
||
|
|
pr_warn("bna %s: Failed reg offset check\n",
|
||
|
|
pci_name(bnad->pcidev));
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
reg_addr = (bfa_ioc_bar0(ioc)) + addr;
|
||
|
|
spin_lock_irqsave(&bnad->bna_lock, flags);
|
||
|
|
writel(val, reg_addr);
|
||
|
|
spin_unlock_irqrestore(&bnad->bna_lock, flags);
|
||
|
|
|
||
|
|
return nbytes;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
bnad_debugfs_release(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
struct bnad_debug_info *debug = file->private_data;
|
||
|
|
|
||
|
|
if (!debug)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
file->private_data = NULL;
|
||
|
|
kfree(debug);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
bnad_debugfs_buffer_release(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
struct bnad_debug_info *debug = file->private_data;
|
||
|
|
|
||
|
|
if (!debug)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
kfree(debug->debug_buffer);
|
||
|
|
|
||
|
|
file->private_data = NULL;
|
||
|
|
kfree(debug);
|
||
|
|
debug = NULL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations bnad_debugfs_op_fwtrc = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = bnad_debugfs_open_fwtrc,
|
||
|
|
.llseek = bnad_debugfs_lseek,
|
||
|
|
.read = bnad_debugfs_read,
|
||
|
|
.release = bnad_debugfs_buffer_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct file_operations bnad_debugfs_op_fwsave = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = bnad_debugfs_open_fwsave,
|
||
|
|
.llseek = bnad_debugfs_lseek,
|
||
|
|
.read = bnad_debugfs_read,
|
||
|
|
.release = bnad_debugfs_buffer_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct file_operations bnad_debugfs_op_regrd = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = bnad_debugfs_open_reg,
|
||
|
|
.llseek = bnad_debugfs_lseek,
|
||
|
|
.read = bnad_debugfs_read_regrd,
|
||
|
|
.write = bnad_debugfs_write_regrd,
|
||
|
|
.release = bnad_debugfs_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct file_operations bnad_debugfs_op_regwr = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = bnad_debugfs_open_reg,
|
||
|
|
.llseek = bnad_debugfs_lseek,
|
||
|
|
.write = bnad_debugfs_write_regwr,
|
||
|
|
.release = bnad_debugfs_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct file_operations bnad_debugfs_op_drvinfo = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = bnad_debugfs_open_drvinfo,
|
||
|
|
.llseek = bnad_debugfs_lseek,
|
||
|
|
.read = bnad_debugfs_read,
|
||
|
|
.release = bnad_debugfs_buffer_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct bnad_debugfs_entry {
|
||
|
|
const char *name;
|
||
|
|
umode_t mode;
|
||
|
|
const struct file_operations *fops;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
|
||
|
|
{ "fwtrc", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwtrc, },
|
||
|
|
{ "fwsave", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwsave, },
|
||
|
|
{ "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bnad_debugfs_op_regrd, },
|
||
|
|
{ "regwr", S_IFREG|S_IWUSR, &bnad_debugfs_op_regwr, },
|
||
|
|
{ "drvinfo", S_IFREG|S_IRUGO, &bnad_debugfs_op_drvinfo, },
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct dentry *bna_debugfs_root;
|
||
|
|
static atomic_t bna_debugfs_port_count;
|
||
|
|
|
||
|
|
/* Initialize debugfs interface for BNA */
|
||
|
|
void
|
||
|
|
bnad_debugfs_init(struct bnad *bnad)
|
||
|
|
{
|
||
|
|
const struct bnad_debugfs_entry *file;
|
||
|
|
char name[64];
|
||
|
|
int i;
|
||
|
|
|
||
|
|
/* Setup the BNA debugfs root directory*/
|
||
|
|
if (!bna_debugfs_root) {
|
||
|
|
bna_debugfs_root = debugfs_create_dir("bna", NULL);
|
||
|
|
atomic_set(&bna_debugfs_port_count, 0);
|
||
|
|
if (!bna_debugfs_root) {
|
||
|
|
pr_warn("BNA: debugfs root dir creation failed\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Setup the pci_dev debugfs directory for the port */
|
||
|
|
snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
|
||
|
|
if (!bnad->port_debugfs_root) {
|
||
|
|
bnad->port_debugfs_root =
|
||
|
|
debugfs_create_dir(name, bna_debugfs_root);
|
||
|
|
if (!bnad->port_debugfs_root) {
|
||
|
|
pr_warn("bna pci_dev %s: root dir creation failed\n",
|
||
|
|
pci_name(bnad->pcidev));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
atomic_inc(&bna_debugfs_port_count);
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
|
||
|
|
file = &bnad_debugfs_files[i];
|
||
|
|
bnad->bnad_dentry_files[i] =
|
||
|
|
debugfs_create_file(file->name,
|
||
|
|
file->mode,
|
||
|
|
bnad->port_debugfs_root,
|
||
|
|
bnad,
|
||
|
|
file->fops);
|
||
|
|
if (!bnad->bnad_dentry_files[i]) {
|
||
|
|
pr_warn(
|
||
|
|
"BNA pci_dev:%s: create %s entry failed\n",
|
||
|
|
pci_name(bnad->pcidev), file->name);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Uninitialize debugfs interface for BNA */
|
||
|
|
void
|
||
|
|
bnad_debugfs_uninit(struct bnad *bnad)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
|
||
|
|
if (bnad->bnad_dentry_files[i]) {
|
||
|
|
debugfs_remove(bnad->bnad_dentry_files[i]);
|
||
|
|
bnad->bnad_dentry_files[i] = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Remove the pci_dev debugfs directory for the port */
|
||
|
|
if (bnad->port_debugfs_root) {
|
||
|
|
debugfs_remove(bnad->port_debugfs_root);
|
||
|
|
bnad->port_debugfs_root = NULL;
|
||
|
|
atomic_dec(&bna_debugfs_port_count);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Remove the BNA debugfs root directory */
|
||
|
|
if (atomic_read(&bna_debugfs_port_count) == 0) {
|
||
|
|
debugfs_remove(bna_debugfs_root);
|
||
|
|
bna_debugfs_root = NULL;
|
||
|
|
}
|
||
|
|
}
|