--- /dev/null
+/*
+ * Linux network driver for QLogic BR-series Converged Network Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+/*
+ * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
+ * Copyright (c) 2014-2015 QLogic Corporation
+ * All rights reserved
+ * www.qlogic.com
+ */
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include "bnad.h"
+
+/*
+ * BNA debufs interface
+ *
+ * To access the interface, debugfs file system should be mounted
+ * if not already mounted using:
+ * mount -t debugfs none /sys/kernel/debug
+ *
+ * BNA Hierarchy:
+ * - bna/pci_dev:<pci_name>
+ * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
+ *
+ * Debugging service available per pci_dev:
+ * fwtrc: To collect current firmware trace.
+ * fwsave: To collect last saved fw trace as a result of firmware crash.
+ * regwr: To write one word to chip register
+ * regrd: To read one or more words from chip register.
+ */
+
+struct bnad_debug_info {
+ char *debug_buffer;
+ void *i_private;
+ int buffer_len;
+};
+
+static int
+bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
+{
+ struct bnad *bnad = inode->i_private;
+ struct bnad_debug_info *fw_debug;
+ unsigned long flags;
+ int rc;
+
+ fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+ if (!fw_debug)
+ return -ENOMEM;
+
+ fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
+
+ fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
+ if (!fw_debug->debug_buffer) {
+ kfree(fw_debug);
+ fw_debug = NULL;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&bnad->bna_lock, flags);
+ rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
+ fw_debug->debug_buffer,
+ &fw_debug->buffer_len);
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ if (rc != BFA_STATUS_OK) {
+ kfree(fw_debug->debug_buffer);
+ fw_debug->debug_buffer = NULL;
+ kfree(fw_debug);
+ fw_debug = NULL;
+ pr_warn("bnad %s: Failed to collect fwtrc\n",
+ pci_name(bnad->pcidev));
+ return -ENOMEM;
+ }
+
+ file->private_data = fw_debug;
+
+ return 0;
+}
+
+static int
+bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
+{
+ struct bnad *bnad = inode->i_private;
+ struct bnad_debug_info *fw_debug;
+ unsigned long flags;
+ int rc;
+
+ fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+ if (!fw_debug)
+ return -ENOMEM;
+
+ fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
+
+ fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
+ if (!fw_debug->debug_buffer) {
+ kfree(fw_debug);
+ fw_debug = NULL;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&bnad->bna_lock, flags);
+ rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
+ fw_debug->debug_buffer,
+ &fw_debug->buffer_len);
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
+ kfree(fw_debug->debug_buffer);
+ fw_debug->debug_buffer = NULL;
+ kfree(fw_debug);
+ fw_debug = NULL;
+ pr_warn("bna %s: Failed to collect fwsave\n",
+ pci_name(bnad->pcidev));
+ return -ENOMEM;
+ }
+
+ file->private_data = fw_debug;
+
+ return 0;
+}
+
+static int
+bnad_debugfs_open_reg(struct inode *inode, struct file *file)
+{
+ struct bnad_debug_info *reg_debug;
+
+ reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+ if (!reg_debug)
+ return -ENOMEM;
+
+ reg_debug->i_private = inode->i_private;
+
+ file->private_data = reg_debug;
+
+ return 0;
+}
+
+static int
+bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
+{
+ struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
+ struct bnad_iocmd_comp fcomp;
+ unsigned long flags = 0;
+ int ret = BFA_STATUS_FAILED;
+
+ /* Get IOC info */
+ spin_lock_irqsave(&bnad->bna_lock, flags);
+ bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+
+ /* Retrieve CEE related info */
+ fcomp.bnad = bnad;
+ fcomp.comp_status = 0;
+ init_completion(&fcomp.comp);
+ spin_lock_irqsave(&bnad->bna_lock, flags);
+ ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
+ bnad_cb_completion, &fcomp);
+ if (ret != BFA_STATUS_OK) {
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ goto out;
+ }
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ wait_for_completion(&fcomp.comp);
+ drvinfo->cee_status = fcomp.comp_status;
+
+ /* Retrieve flash partition info */
+ fcomp.comp_status = 0;
+ reinit_completion(&fcomp.comp);
+ spin_lock_irqsave(&bnad->bna_lock, flags);
+ ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
+ bnad_cb_completion, &fcomp);
+ if (ret != BFA_STATUS_OK) {
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ goto out;
+ }
+ spin_unlock_irqrestore(&bnad->bna_lock, flags);
+ wait_for_completion(&fcomp.comp);
+ drvinfo->flash_status = fcomp.comp_status;
+out:
+ return ret;
+}
+
+static int
+bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
+{
+ struct bnad *bnad = inode->i_private;
+ struct bnad_debug_info *drv_info;
+ int rc;
+
+ drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+ if (!drv_info)
+ return -ENOMEM;
+
+ drv_info->buffer_len = sizeof(struct bnad_drvinfo);
+
+ drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
+ if (!drv_info->debug_buffer) {
+ kfree(drv_info);
+ drv_info = NULL;
+ return -ENOMEM;
+ }
+
+ mutex_lock(&bnad->conf_mutex);
+ rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
+ drv_info->buffer_len);
+ mutex_unlock(&bnad->conf_mutex);
+ if (rc != BFA_STATUS_OK) {
+ kfree(drv_info->debug_buffer);
+ drv_info->debug_buffer = NULL;
+ kfree(drv_info);
+ drv_info = NULL;
+ pr_warn("bna %s: Failed to collect drvinfo\n",
+ pci_name(bnad->pcidev));
+ return -ENOMEM;
+ }
+
+ file->private_data = drv_info;
+
+ return 0;
+}
+
+/* Changes the current file position */
+static loff_t
+bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
+{
+ struct bnad_debug_info *debug = file->private_data;
+
+ if (!debug)
+ return -EINVAL;
+
+ return fixed_size_llseek(file, offset, orig, debug->buffer_len);
+}
+
+static ssize_t
+bnad_debugfs_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *pos)
+{
+ struct bnad_debug_info *debug = file->private_data;
+
+ if (!debug || !debug->debug_buffer)
+ return 0;
+
+ return simple_read_from_buffer(buf, nbytes, pos,
+ debug->debug_buffer, debug->buffer_len);
+}
+
+#define BFA_REG_CT_ADDRSZ (0x40000)
+#define BFA_REG_CB_ADDRSZ (0x20000)
+#define BFA_REG_ADDRSZ(__ioc) \
+ ((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \
+ BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
+#define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1)
+
+/*
+ * Function to check if the register offset passed is valid.
+ */
+static int
+bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
+{
+ u8 area;
+
+ /* check [16:15] */
+ area = (offset >> 15) & 0x7;
+ if (area == 0) {
+ /* PCIe core register */
+ if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */
+ return BFA_STATUS_EINVAL;
+ } else if (area == 0x1) {
+ /* CB 32 KB memory page */
+ if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */
+ return BFA_STATUS_EINVAL;
+ } else {
+ /* CB register space 64KB */
+ if ((offset + (len<<2)) > BFA_REG_ADDRMSK(ioc))
+ return BFA_STATUS_EINVAL;
+ }
+ return BFA_STATUS_OK;
+}
+
+static ssize_t
+bnad_debugfs_read_regrd(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *pos)
+{
+ struct bnad_debug_info *regrd_debug = file->private_data;
+ struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
+ ssize_t rc;
+
+ if (!bnad->regdata)
+ return 0;
+
+ rc = simple_read_from_buffer(buf, nbytes, pos,
+ bnad->regdata, bnad->reglen);
+
+ if ((*pos + nbytes) >= bnad->reglen) {
+ kfree(bnad->regdata);
+ bnad->regdata = NULL;
+ bnad->reglen = 0;
+ }
+
+ return rc;
+}
+
+static ssize_t
+bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct bnad_debug_info *regrd_debug = file->private_data;
+ struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
+ struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
+ int addr, len, rc, i;
+ u32 *regbuf;
+ void __iomem *rb, *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, &len);
+ 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);
+ kfree(bnad->regdata);
+ bnad->regdata = NULL;
+ bnad->reglen = 0;
+
+ bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
+ if (!bnad->regdata)
+ return -ENOMEM;
+
+ bnad->reglen = len << 2;
+ rb = bfa_ioc_bar0(ioc);
+ 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;
+ }
+}
Code Review / kvmfornfv.git / blobdiff