From b728ddde769c568c49f42468114eb801e0a93ce9 Mon Sep 17 00:00:00 2001 From: Vitaly Lubart Date: Mon, 20 May 2019 11:55:39 +0300 Subject: mei: Convert to use DEFINE_SHOW_ATTRIBUTE macro Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Vitaly Lubart Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/debugfs.c | 184 +++++++++++++-------------------------------- 1 file changed, 52 insertions(+), 132 deletions(-) (limited to 'drivers/misc/mei') diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 0970142bcace..47cfd5005e1b 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -8,6 +8,7 @@ #include #include #include +#include #include @@ -15,104 +16,56 @@ #include "client.h" #include "hw.h" -static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, - size_t cnt, loff_t *ppos) +static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused) { - struct mei_device *dev = fp->private_data; + struct mei_device *dev = m->private; struct mei_me_client *me_cl; - size_t bufsz = 1; - char *buf; int i = 0; - int pos = 0; - int ret; -#define HDR \ -" |id|fix| UUID |con|msg len|sb|refc|\n" + if (!dev) + return -ENODEV; down_read(&dev->me_clients_rwsem); - list_for_each_entry(me_cl, &dev->me_clients, list) - bufsz++; - bufsz *= sizeof(HDR) + 1; - buf = kzalloc(bufsz, GFP_KERNEL); - if (!buf) { - up_read(&dev->me_clients_rwsem); - return -ENOMEM; - } - - pos += scnprintf(buf + pos, bufsz - pos, HDR); -#undef HDR + seq_puts(m, " |id|fix| UUID |con|msg len|sb|refc|\n"); /* if the driver is not enabled the list won't be consistent */ if (dev->dev_state != MEI_DEV_ENABLED) goto out; list_for_each_entry(me_cl, &dev->me_clients, list) { - - if (mei_me_cl_get(me_cl)) { - pos += scnprintf(buf + pos, bufsz - pos, - "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n", - i++, me_cl->client_id, - me_cl->props.fixed_address, - &me_cl->props.protocol_name, - me_cl->props.max_number_of_connections, - me_cl->props.max_msg_length, - me_cl->props.single_recv_buf, - kref_read(&me_cl->refcnt)); - - mei_me_cl_put(me_cl); - } + if (!mei_me_cl_get(me_cl)) + continue; + + seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n", + i++, me_cl->client_id, + me_cl->props.fixed_address, + &me_cl->props.protocol_name, + me_cl->props.max_number_of_connections, + me_cl->props.max_msg_length, + me_cl->props.single_recv_buf, + kref_read(&me_cl->refcnt)); + mei_me_cl_put(me_cl); } out: up_read(&dev->me_clients_rwsem); - ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); - kfree(buf); - return ret; + return 0; } +DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients); -static const struct file_operations mei_dbgfs_fops_meclients = { - .open = simple_open, - .read = mei_dbgfs_read_meclients, - .llseek = generic_file_llseek, -}; - -static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, - size_t cnt, loff_t *ppos) +static int mei_dbgfs_active_show(struct seq_file *m, void *unused) { - struct mei_device *dev = fp->private_data; + struct mei_device *dev = m->private; struct mei_cl *cl; - size_t bufsz = 1; - char *buf; int i = 0; - int pos = 0; - int ret; - -#define HDR " |me|host|state|rd|wr|wrq\n" if (!dev) return -ENODEV; mutex_lock(&dev->device_lock); - /* - * if the driver is not enabled the list won't be consistent, - * we output empty table - */ - if (dev->dev_state == MEI_DEV_ENABLED) - list_for_each_entry(cl, &dev->file_list, link) - bufsz++; - - bufsz *= sizeof(HDR) + 1; - - buf = kzalloc(bufsz, GFP_KERNEL); - if (!buf) { - mutex_unlock(&dev->device_lock); - return -ENOMEM; - } - - pos += scnprintf(buf + pos, bufsz - pos, HDR); -#undef HDR + seq_puts(m, " |me|host|state|rd|wr|wrq\n"); /* if the driver is not enabled the list won't be consistent */ if (dev->dev_state != MEI_DEV_ENABLED) @@ -120,76 +73,44 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, list_for_each_entry(cl, &dev->file_list, link) { - pos += scnprintf(buf + pos, bufsz - pos, - "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n", - i, mei_cl_me_id(cl), cl->host_client_id, cl->state, - !list_empty(&cl->rd_completed), cl->writing_state, - cl->tx_cb_queued); + seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n", + i, mei_cl_me_id(cl), cl->host_client_id, cl->state, + !list_empty(&cl->rd_completed), cl->writing_state, + cl->tx_cb_queued); i++; } out: mutex_unlock(&dev->device_lock); - ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); - kfree(buf); - return ret; + return 0; } +DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active); -static const struct file_operations mei_dbgfs_fops_active = { - .open = simple_open, - .read = mei_dbgfs_read_active, - .llseek = generic_file_llseek, -}; - -static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, - size_t cnt, loff_t *ppos) +static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused) { - struct mei_device *dev = fp->private_data; - const size_t bufsz = 1024; - char *buf = kzalloc(bufsz, GFP_KERNEL); - int pos = 0; - int ret; - - if (!buf) - return -ENOMEM; + struct mei_device *dev = m->private; - pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n", - mei_dev_state_str(dev->dev_state)); - pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n", - mei_hbm_state_str(dev->hbm_state)); + seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state)); + seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state)); if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS && dev->hbm_state <= MEI_HBM_STARTED) { - pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n"); - pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n", - dev->hbm_f_pg_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n", - dev->hbm_f_dc_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tIE: %01d\n", - dev->hbm_f_ie_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n", - dev->hbm_f_dot_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n", - dev->hbm_f_ev_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tFA: %01d\n", - dev->hbm_f_fa_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tOS: %01d\n", - dev->hbm_f_os_supported); - pos += scnprintf(buf + pos, bufsz - pos, "\tDR: %01d\n", - dev->hbm_f_dr_supported); + seq_puts(m, "hbm features:\n"); + seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported); + seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported); + seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported); + seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported); + seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported); + seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported); + seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported); + seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported); } - pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n", - mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED", - mei_pg_state_str(mei_pg_state(dev))); - ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); - kfree(buf); - return ret; + seq_printf(m, "pg: %s, %s\n", + mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED", + mei_pg_state_str(mei_pg_state(dev))); + return 0; } -static const struct file_operations mei_dbgfs_fops_devstate = { - .open = simple_open, - .read = mei_dbgfs_read_devstate, - .llseek = generic_file_llseek, -}; +DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate); static ssize_t mei_dbgfs_write_allow_fa(struct file *file, const char __user *user_buf, @@ -208,7 +129,7 @@ static ssize_t mei_dbgfs_write_allow_fa(struct file *file, return ret; } -static const struct file_operations mei_dbgfs_fops_allow_fa = { +static const struct file_operations mei_dbgfs_allow_fa_fops = { .open = simple_open, .read = debugfs_read_file_bool, .write = mei_dbgfs_write_allow_fa, @@ -247,26 +168,26 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name) dev->dbgfs_dir = dir; f = debugfs_create_file("meclients", S_IRUSR, dir, - dev, &mei_dbgfs_fops_meclients); + dev, &mei_dbgfs_meclients_fops); if (!f) { dev_err(dev->dev, "meclients: registration failed\n"); goto err; } f = debugfs_create_file("active", S_IRUSR, dir, - dev, &mei_dbgfs_fops_active); + dev, &mei_dbgfs_active_fops); if (!f) { dev_err(dev->dev, "active: registration failed\n"); goto err; } f = debugfs_create_file("devstate", S_IRUSR, dir, - dev, &mei_dbgfs_fops_devstate); + dev, &mei_dbgfs_devstate_fops); if (!f) { dev_err(dev->dev, "devstate: registration failed\n"); goto err; } f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir, &dev->allow_fixed_address, - &mei_dbgfs_fops_allow_fa); + &mei_dbgfs_allow_fa_fops); if (!f) { dev_err(dev->dev, "allow_fixed_address: registration failed\n"); goto err; @@ -276,4 +197,3 @@ err: mei_dbgfs_deregister(dev); return -ENODEV; } - -- cgit v1.2.3