diff options
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_fs.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_fs.c | 549 |
1 files changed, 0 insertions, 549 deletions
diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c deleted file mode 100644 index 2098de762bf5..000000000000 --- a/drivers/infiniband/hw/qib/qib_fs.c +++ /dev/null @@ -1,549 +0,0 @@ -/* - * Copyright (c) 2012 Intel Corporation. All rights reserved. - * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. - * Copyright (c) 2006 PathScale, Inc. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include <linux/fs.h> -#include <linux/fs_context.h> -#include <linux/mount.h> -#include <linux/pagemap.h> -#include <linux/init.h> -#include <linux/namei.h> - -#include "qib.h" - -#define QIBFS_MAGIC 0x726a77 - -static struct super_block *qib_super; - -#define private2dd(file) (file_inode(file)->i_private) - -static int qibfs_mknod(struct inode *dir, struct dentry *dentry, - umode_t mode, const struct file_operations *fops, - void *data) -{ - int error; - struct inode *inode = new_inode(dir->i_sb); - - if (!inode) { - dput(dentry); - error = -EPERM; - goto bail; - } - - inode->i_ino = get_next_ino(); - inode->i_mode = mode; - inode->i_uid = GLOBAL_ROOT_UID; - inode->i_gid = GLOBAL_ROOT_GID; - inode->i_blocks = 0; - simple_inode_init_ts(inode); - - inode->i_private = data; - if (S_ISDIR(mode)) { - inode->i_op = &simple_dir_inode_operations; - inc_nlink(inode); - inc_nlink(dir); - } - - inode->i_fop = fops; - - d_instantiate(dentry, inode); - error = 0; - -bail: - return error; -} - -static int create_file(const char *name, umode_t mode, - struct dentry *parent, struct dentry **dentry, - const struct file_operations *fops, void *data) -{ - int error; - - inode_lock(d_inode(parent)); - *dentry = lookup_noperm(&QSTR(name), parent); - if (!IS_ERR(*dentry)) - error = qibfs_mknod(d_inode(parent), *dentry, - mode, fops, data); - else - error = PTR_ERR(*dentry); - inode_unlock(d_inode(parent)); - - return error; -} - -static ssize_t driver_stats_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - qib_stats.sps_ints = qib_sps_ints(); - return simple_read_from_buffer(buf, count, ppos, &qib_stats, - sizeof(qib_stats)); -} - -/* - * driver stats field names, one line per stat, single string. Used by - * programs like ipathstats to print the stats in a way which works for - * different versions of drivers, without changing program source. - * if qlogic_ib_stats changes, this needs to change. Names need to be - * 12 chars or less (w/o newline), for proper display by ipathstats utility. - */ -static const char qib_statnames[] = - "KernIntr\n" - "ErrorIntr\n" - "Tx_Errs\n" - "Rcv_Errs\n" - "H/W_Errs\n" - "NoPIOBufs\n" - "CtxtsOpen\n" - "RcvLen_Errs\n" - "EgrBufFull\n" - "EgrHdrFull\n" - ; - -static ssize_t driver_names_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - return simple_read_from_buffer(buf, count, ppos, qib_statnames, - sizeof(qib_statnames) - 1); /* no null */ -} - -static const struct file_operations driver_ops[] = { - { .read = driver_stats_read, .llseek = generic_file_llseek, }, - { .read = driver_names_read, .llseek = generic_file_llseek, }, -}; - -/* read the per-device counters */ -static ssize_t dev_counters_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - u64 *counters; - size_t avail; - struct qib_devdata *dd = private2dd(file); - - avail = dd->f_read_cntrs(dd, *ppos, NULL, &counters); - return simple_read_from_buffer(buf, count, ppos, counters, avail); -} - -/* read the per-device counters */ -static ssize_t dev_names_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - char *names; - size_t avail; - struct qib_devdata *dd = private2dd(file); - - avail = dd->f_read_cntrs(dd, *ppos, &names, NULL); - return simple_read_from_buffer(buf, count, ppos, names, avail); -} - -static const struct file_operations cntr_ops[] = { - { .read = dev_counters_read, .llseek = generic_file_llseek, }, - { .read = dev_names_read, .llseek = generic_file_llseek, }, -}; - -/* - * Could use file_inode(file)->i_ino to figure out which file, - * instead of separate routine for each, but for now, this works... - */ - -/* read the per-port names (same for each port) */ -static ssize_t portnames_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - char *names; - size_t avail; - struct qib_devdata *dd = private2dd(file); - - avail = dd->f_read_portcntrs(dd, *ppos, 0, &names, NULL); - return simple_read_from_buffer(buf, count, ppos, names, avail); -} - -/* read the per-port counters for port 1 (pidx 0) */ -static ssize_t portcntrs_1_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - u64 *counters; - size_t avail; - struct qib_devdata *dd = private2dd(file); - - avail = dd->f_read_portcntrs(dd, *ppos, 0, NULL, &counters); - return simple_read_from_buffer(buf, count, ppos, counters, avail); -} - -/* read the per-port counters for port 2 (pidx 1) */ -static ssize_t portcntrs_2_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - u64 *counters; - size_t avail; - struct qib_devdata *dd = private2dd(file); - - avail = dd->f_read_portcntrs(dd, *ppos, 1, NULL, &counters); - return simple_read_from_buffer(buf, count, ppos, counters, avail); -} - -static const struct file_operations portcntr_ops[] = { - { .read = portnames_read, .llseek = generic_file_llseek, }, - { .read = portcntrs_1_read, .llseek = generic_file_llseek, }, - { .read = portcntrs_2_read, .llseek = generic_file_llseek, }, -}; - -/* - * read the per-port QSFP data for port 1 (pidx 0) - */ -static ssize_t qsfp_1_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct qib_devdata *dd = private2dd(file); - char *tmp; - int ret; - - tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (!tmp) - return -ENOMEM; - - ret = qib_qsfp_dump(dd->pport, tmp, PAGE_SIZE); - if (ret > 0) - ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); - kfree(tmp); - return ret; -} - -/* - * read the per-port QSFP data for port 2 (pidx 1) - */ -static ssize_t qsfp_2_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct qib_devdata *dd = private2dd(file); - char *tmp; - int ret; - - if (dd->num_pports < 2) - return -ENODEV; - - tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (!tmp) - return -ENOMEM; - - ret = qib_qsfp_dump(dd->pport + 1, tmp, PAGE_SIZE); - if (ret > 0) - ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); - kfree(tmp); - return ret; -} - -static const struct file_operations qsfp_ops[] = { - { .read = qsfp_1_read, .llseek = generic_file_llseek, }, - { .read = qsfp_2_read, .llseek = generic_file_llseek, }, -}; - -static ssize_t flash_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct qib_devdata *dd; - ssize_t ret; - loff_t pos; - char *tmp; - - pos = *ppos; - - if (pos < 0) { - ret = -EINVAL; - goto bail; - } - - if (pos >= sizeof(struct qib_flash)) { - ret = 0; - goto bail; - } - - if (count > sizeof(struct qib_flash) - pos) - count = sizeof(struct qib_flash) - pos; - - tmp = kmalloc(count, GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto bail; - } - - dd = private2dd(file); - if (qib_eeprom_read(dd, pos, tmp, count)) { - qib_dev_err(dd, "failed to read from flash\n"); - ret = -ENXIO; - goto bail_tmp; - } - - if (copy_to_user(buf, tmp, count)) { - ret = -EFAULT; - goto bail_tmp; - } - - *ppos = pos + count; - ret = count; - -bail_tmp: - kfree(tmp); - -bail: - return ret; -} - -static ssize_t flash_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct qib_devdata *dd; - ssize_t ret; - loff_t pos; - char *tmp; - - pos = *ppos; - - if (pos != 0 || count != sizeof(struct qib_flash)) - return -EINVAL; - - tmp = memdup_user(buf, count); - if (IS_ERR(tmp)) - return PTR_ERR(tmp); - - dd = private2dd(file); - if (qib_eeprom_write(dd, pos, tmp, count)) { - ret = -ENXIO; - qib_dev_err(dd, "failed to write to flash\n"); - goto bail_tmp; - } - - *ppos = pos + count; - ret = count; - -bail_tmp: - kfree(tmp); - return ret; -} - -static const struct file_operations flash_ops = { - .read = flash_read, - .write = flash_write, - .llseek = default_llseek, -}; - -static int add_cntr_files(struct super_block *sb, struct qib_devdata *dd) -{ - struct dentry *dir, *tmp; - char unit[10]; - int ret, i; - - /* create the per-unit directory */ - snprintf(unit, sizeof(unit), "%u", dd->unit); - ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir, - &simple_dir_operations, dd); - if (ret) { - pr_err("create_file(%s) failed: %d\n", unit, ret); - goto bail; - } - - /* create the files in the new directory */ - ret = create_file("counters", S_IFREG|S_IRUGO, dir, &tmp, - &cntr_ops[0], dd); - if (ret) { - pr_err("create_file(%s/counters) failed: %d\n", - unit, ret); - goto bail; - } - ret = create_file("counter_names", S_IFREG|S_IRUGO, dir, &tmp, - &cntr_ops[1], dd); - if (ret) { - pr_err("create_file(%s/counter_names) failed: %d\n", - unit, ret); - goto bail; - } - ret = create_file("portcounter_names", S_IFREG|S_IRUGO, dir, &tmp, - &portcntr_ops[0], dd); - if (ret) { - pr_err("create_file(%s/%s) failed: %d\n", - unit, "portcounter_names", ret); - goto bail; - } - for (i = 1; i <= dd->num_pports; i++) { - char fname[24]; - - sprintf(fname, "port%dcounters", i); - /* create the files in the new directory */ - ret = create_file(fname, S_IFREG|S_IRUGO, dir, &tmp, - &portcntr_ops[i], dd); - if (ret) { - pr_err("create_file(%s/%s) failed: %d\n", - unit, fname, ret); - goto bail; - } - if (!(dd->flags & QIB_HAS_QSFP)) - continue; - sprintf(fname, "qsfp%d", i); - ret = create_file(fname, S_IFREG|S_IRUGO, dir, &tmp, - &qsfp_ops[i - 1], dd); - if (ret) { - pr_err("create_file(%s/%s) failed: %d\n", - unit, fname, ret); - goto bail; - } - } - - ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp, - &flash_ops, dd); - if (ret) - pr_err("create_file(%s/flash) failed: %d\n", - unit, ret); -bail: - return ret; -} - -static int remove_device_files(struct super_block *sb, - struct qib_devdata *dd) -{ - struct dentry *dir; - char unit[10]; - - snprintf(unit, sizeof(unit), "%u", dd->unit); - dir = lookup_noperm_unlocked(&QSTR(unit), sb->s_root); - - if (IS_ERR(dir)) { - pr_err("Lookup of %s failed\n", unit); - return PTR_ERR(dir); - } - simple_recursive_removal(dir, NULL); - dput(dir); - return 0; -} - -/* - * This fills everything in when the fs is mounted, to handle umount/mount - * after device init. The direct add_cntr_files() call handles adding - * them from the init code, when the fs is already mounted. - */ -static int qibfs_fill_super(struct super_block *sb, struct fs_context *fc) -{ - struct qib_devdata *dd; - unsigned long index; - int ret; - - static const struct tree_descr files[] = { - [2] = {"driver_stats", &driver_ops[0], S_IRUGO}, - [3] = {"driver_stats_names", &driver_ops[1], S_IRUGO}, - {""}, - }; - - ret = simple_fill_super(sb, QIBFS_MAGIC, files); - if (ret) { - pr_err("simple_fill_super failed: %d\n", ret); - goto bail; - } - - xa_for_each(&qib_dev_table, index, dd) { - ret = add_cntr_files(sb, dd); - if (ret) - goto bail; - } - -bail: - return ret; -} - -static int qibfs_get_tree(struct fs_context *fc) -{ - int ret = get_tree_single(fc, qibfs_fill_super); - if (ret == 0) - qib_super = fc->root->d_sb; - return ret; -} - -static const struct fs_context_operations qibfs_context_ops = { - .get_tree = qibfs_get_tree, -}; - -static int qibfs_init_fs_context(struct fs_context *fc) -{ - fc->ops = &qibfs_context_ops; - return 0; -} - -static void qibfs_kill_super(struct super_block *s) -{ - kill_litter_super(s); - qib_super = NULL; -} - -int qibfs_add(struct qib_devdata *dd) -{ - int ret; - - /* - * On first unit initialized, qib_super will not yet exist - * because nobody has yet tried to mount the filesystem, so - * we can't consider that to be an error; if an error occurs - * during the mount, that will get a complaint, so this is OK. - * add_cntr_files() for all units is done at mount from - * qibfs_fill_super(), so one way or another, everything works. - */ - if (qib_super == NULL) - ret = 0; - else - ret = add_cntr_files(qib_super, dd); - return ret; -} - -int qibfs_remove(struct qib_devdata *dd) -{ - int ret = 0; - - if (qib_super) - ret = remove_device_files(qib_super, dd); - - return ret; -} - -static struct file_system_type qibfs_fs_type = { - .owner = THIS_MODULE, - .name = "ipathfs", - .init_fs_context = qibfs_init_fs_context, - .kill_sb = qibfs_kill_super, -}; -MODULE_ALIAS_FS("ipathfs"); - -int __init qib_init_qibfs(void) -{ - return register_filesystem(&qibfs_fs_type); -} - -int __exit qib_exit_qibfs(void) -{ - return unregister_filesystem(&qibfs_fs_type); -} |