408 lines
12 KiB
C
408 lines
12 KiB
C
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/*
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* WUSB Wire Adapter: WLP interface
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* Sysfs interfaces
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*
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* Copyright (C) 2005-2006 Intel Corporation
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*
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* FIXME: docs
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*/
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/device.h>
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#include "i1480u-wlp.h"
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/**
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*
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* @dev: Class device from the net_device; assumed refcnted.
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*
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* Yes, I don't lock--we assume it is refcounted and I am getting a
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* single byte value that is kind of atomic to read.
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*/
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ssize_t uwb_phy_rate_show(const struct wlp_options *options, char *buf)
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{
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return sprintf(buf, "%u\n",
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wlp_tx_hdr_phy_rate(&options->def_tx_hdr));
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}
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EXPORT_SYMBOL_GPL(uwb_phy_rate_show);
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ssize_t uwb_phy_rate_store(struct wlp_options *options,
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const char *buf, size_t size)
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{
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ssize_t result;
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unsigned rate;
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result = sscanf(buf, "%u\n", &rate);
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if (result != 1) {
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result = -EINVAL;
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goto out;
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}
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result = -EINVAL;
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if (rate >= UWB_PHY_RATE_INVALID)
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goto out;
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wlp_tx_hdr_set_phy_rate(&options->def_tx_hdr, rate);
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result = 0;
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out:
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return result < 0 ? result : size;
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}
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EXPORT_SYMBOL_GPL(uwb_phy_rate_store);
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ssize_t uwb_rts_cts_show(const struct wlp_options *options, char *buf)
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{
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return sprintf(buf, "%u\n",
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wlp_tx_hdr_rts_cts(&options->def_tx_hdr));
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}
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EXPORT_SYMBOL_GPL(uwb_rts_cts_show);
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ssize_t uwb_rts_cts_store(struct wlp_options *options,
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const char *buf, size_t size)
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{
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ssize_t result;
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unsigned value;
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result = sscanf(buf, "%u\n", &value);
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if (result != 1) {
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result = -EINVAL;
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goto out;
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}
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result = -EINVAL;
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wlp_tx_hdr_set_rts_cts(&options->def_tx_hdr, !!value);
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result = 0;
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out:
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return result < 0 ? result : size;
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}
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EXPORT_SYMBOL_GPL(uwb_rts_cts_store);
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ssize_t uwb_ack_policy_show(const struct wlp_options *options, char *buf)
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{
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return sprintf(buf, "%u\n",
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wlp_tx_hdr_ack_policy(&options->def_tx_hdr));
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}
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EXPORT_SYMBOL_GPL(uwb_ack_policy_show);
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ssize_t uwb_ack_policy_store(struct wlp_options *options,
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const char *buf, size_t size)
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{
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ssize_t result;
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unsigned value;
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result = sscanf(buf, "%u\n", &value);
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if (result != 1 || value > UWB_ACK_B_REQ) {
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result = -EINVAL;
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goto out;
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}
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wlp_tx_hdr_set_ack_policy(&options->def_tx_hdr, value);
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result = 0;
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out:
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return result < 0 ? result : size;
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}
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EXPORT_SYMBOL_GPL(uwb_ack_policy_store);
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/**
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* Show the PCA base priority.
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*
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* We can access without locking, as the value is (for now) orthogonal
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* to other values.
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*/
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ssize_t uwb_pca_base_priority_show(const struct wlp_options *options,
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char *buf)
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{
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return sprintf(buf, "%u\n",
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options->pca_base_priority);
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}
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EXPORT_SYMBOL_GPL(uwb_pca_base_priority_show);
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/**
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* Set the PCA base priority.
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*
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* We can access without locking, as the value is (for now) orthogonal
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* to other values.
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*/
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ssize_t uwb_pca_base_priority_store(struct wlp_options *options,
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const char *buf, size_t size)
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{
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ssize_t result = -EINVAL;
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u8 pca_base_priority;
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result = sscanf(buf, "%hhu\n", &pca_base_priority);
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if (result != 1) {
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result = -EINVAL;
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goto out;
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}
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result = -EINVAL;
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if (pca_base_priority >= 8)
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goto out;
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options->pca_base_priority = pca_base_priority;
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/* Update TX header if we are currently using PCA. */
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if (result >= 0 && (wlp_tx_hdr_delivery_id_type(&options->def_tx_hdr) & WLP_DRP) == 0)
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wlp_tx_hdr_set_delivery_id_type(&options->def_tx_hdr, options->pca_base_priority);
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result = 0;
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out:
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return result < 0 ? result : size;
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}
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EXPORT_SYMBOL_GPL(uwb_pca_base_priority_store);
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/**
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* Show current inflight values
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*
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* Will print the current MAX and THRESHOLD values for the basic flow
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* control. In addition it will report how many times the TX queue needed
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* to be restarted since the last time this query was made.
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*/
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static ssize_t wlp_tx_inflight_show(struct i1480u_tx_inflight *inflight,
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char *buf)
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{
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ssize_t result;
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unsigned long sec_elapsed = (jiffies - inflight->restart_ts)/HZ;
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unsigned long restart_count = atomic_read(&inflight->restart_count);
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result = scnprintf(buf, PAGE_SIZE, "%lu %lu %d %lu %lu %lu\n"
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"#read: threshold max inflight_count restarts "
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"seconds restarts/sec\n"
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"#write: threshold max\n",
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inflight->threshold, inflight->max,
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atomic_read(&inflight->count),
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restart_count, sec_elapsed,
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sec_elapsed == 0 ? 0 : restart_count/sec_elapsed);
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inflight->restart_ts = jiffies;
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atomic_set(&inflight->restart_count, 0);
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return result;
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}
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static
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ssize_t wlp_tx_inflight_store(struct i1480u_tx_inflight *inflight,
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const char *buf, size_t size)
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{
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unsigned long in_threshold, in_max;
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ssize_t result;
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result = sscanf(buf, "%lu %lu", &in_threshold, &in_max);
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if (result != 2)
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return -EINVAL;
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if (in_max <= in_threshold)
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return -EINVAL;
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inflight->max = in_max;
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inflight->threshold = in_threshold;
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return size;
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}
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/*
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* Glue (or function adaptors) for accesing info on sysfs
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*
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* [we need this indirection because the PCI driver does almost the
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* same]
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*
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* Linux 2.6.21 changed how 'struct netdevice' does attributes (from
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* having a 'struct class_dev' to having a 'struct device'). That is
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* quite of a pain.
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*
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* So we try to abstract that here. i1480u_SHOW() and i1480u_STORE()
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* create adaptors for extracting the 'struct i1480u' from a 'struct
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* dev' and calling a function for doing a sysfs operation (as we have
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* them factorized already). i1480u_ATTR creates the attribute file
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* (CLASS_DEVICE_ATTR or DEVICE_ATTR) and i1480u_ATTR_NAME produces a
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* class_device_attr_NAME or device_attr_NAME (for group registration).
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*/
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#define i1480u_SHOW(name, fn, param) \
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static ssize_t i1480u_show_##name(struct device *dev, \
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struct device_attribute *attr,\
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char *buf) \
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{ \
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struct i1480u *i1480u = netdev_priv(to_net_dev(dev)); \
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return fn(&i1480u->param, buf); \
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}
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#define i1480u_STORE(name, fn, param) \
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static ssize_t i1480u_store_##name(struct device *dev, \
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struct device_attribute *attr,\
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const char *buf, size_t size)\
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{ \
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struct i1480u *i1480u = netdev_priv(to_net_dev(dev)); \
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return fn(&i1480u->param, buf, size); \
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}
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#define i1480u_ATTR(name, perm) static DEVICE_ATTR(name, perm, \
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i1480u_show_##name,\
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i1480u_store_##name)
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#define i1480u_ATTR_SHOW(name) static DEVICE_ATTR(name, \
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S_IRUGO, \
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i1480u_show_##name, NULL)
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#define i1480u_ATTR_NAME(a) (dev_attr_##a)
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/*
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* Sysfs adaptors
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*/
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i1480u_SHOW(uwb_phy_rate, uwb_phy_rate_show, options);
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i1480u_STORE(uwb_phy_rate, uwb_phy_rate_store, options);
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i1480u_ATTR(uwb_phy_rate, S_IRUGO | S_IWUSR);
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i1480u_SHOW(uwb_rts_cts, uwb_rts_cts_show, options);
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i1480u_STORE(uwb_rts_cts, uwb_rts_cts_store, options);
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i1480u_ATTR(uwb_rts_cts, S_IRUGO | S_IWUSR);
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i1480u_SHOW(uwb_ack_policy, uwb_ack_policy_show, options);
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i1480u_STORE(uwb_ack_policy, uwb_ack_policy_store, options);
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i1480u_ATTR(uwb_ack_policy, S_IRUGO | S_IWUSR);
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i1480u_SHOW(uwb_pca_base_priority, uwb_pca_base_priority_show, options);
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i1480u_STORE(uwb_pca_base_priority, uwb_pca_base_priority_store, options);
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i1480u_ATTR(uwb_pca_base_priority, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_eda, wlp_eda_show, wlp);
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i1480u_STORE(wlp_eda, wlp_eda_store, wlp);
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i1480u_ATTR(wlp_eda, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_uuid, wlp_uuid_show, wlp);
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i1480u_STORE(wlp_uuid, wlp_uuid_store, wlp);
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i1480u_ATTR(wlp_uuid, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_name, wlp_dev_name_show, wlp);
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i1480u_STORE(wlp_dev_name, wlp_dev_name_store, wlp);
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i1480u_ATTR(wlp_dev_name, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_manufacturer, wlp_dev_manufacturer_show, wlp);
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i1480u_STORE(wlp_dev_manufacturer, wlp_dev_manufacturer_store, wlp);
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i1480u_ATTR(wlp_dev_manufacturer, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_model_name, wlp_dev_model_name_show, wlp);
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i1480u_STORE(wlp_dev_model_name, wlp_dev_model_name_store, wlp);
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i1480u_ATTR(wlp_dev_model_name, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_model_nr, wlp_dev_model_nr_show, wlp);
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i1480u_STORE(wlp_dev_model_nr, wlp_dev_model_nr_store, wlp);
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i1480u_ATTR(wlp_dev_model_nr, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_serial, wlp_dev_serial_show, wlp);
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i1480u_STORE(wlp_dev_serial, wlp_dev_serial_store, wlp);
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i1480u_ATTR(wlp_dev_serial, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_prim_category, wlp_dev_prim_category_show, wlp);
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i1480u_STORE(wlp_dev_prim_category, wlp_dev_prim_category_store, wlp);
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i1480u_ATTR(wlp_dev_prim_category, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_prim_OUI, wlp_dev_prim_OUI_show, wlp);
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i1480u_STORE(wlp_dev_prim_OUI, wlp_dev_prim_OUI_store, wlp);
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i1480u_ATTR(wlp_dev_prim_OUI, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_prim_OUI_sub, wlp_dev_prim_OUI_sub_show, wlp);
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i1480u_STORE(wlp_dev_prim_OUI_sub, wlp_dev_prim_OUI_sub_store, wlp);
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i1480u_ATTR(wlp_dev_prim_OUI_sub, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_dev_prim_subcat, wlp_dev_prim_subcat_show, wlp);
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i1480u_STORE(wlp_dev_prim_subcat, wlp_dev_prim_subcat_store, wlp);
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i1480u_ATTR(wlp_dev_prim_subcat, S_IRUGO | S_IWUSR);
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i1480u_SHOW(wlp_neighborhood, wlp_neighborhood_show, wlp);
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i1480u_ATTR_SHOW(wlp_neighborhood);
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i1480u_SHOW(wss_activate, wlp_wss_activate_show, wlp.wss);
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i1480u_STORE(wss_activate, wlp_wss_activate_store, wlp.wss);
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i1480u_ATTR(wss_activate, S_IRUGO | S_IWUSR);
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/*
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* Show the (min, max, avg) Line Quality Estimate (LQE, in dB) as over
|
||
|
|
* the last 256 received WLP frames (ECMA-368 13.3).
|
||
|
|
*
|
||
|
|
* [the -7dB that have to be substracted from the LQI to make the LQE
|
||
|
|
* are already taken into account].
|
||
|
|
*/
|
||
|
|
i1480u_SHOW(wlp_lqe, stats_show, lqe_stats);
|
||
|
|
i1480u_STORE(wlp_lqe, stats_store, lqe_stats);
|
||
|
|
i1480u_ATTR(wlp_lqe, S_IRUGO | S_IWUSR);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Show the Receive Signal Strength Indicator averaged over all the
|
||
|
|
* received WLP frames (ECMA-368 13.3). Still is not clear what
|
||
|
|
* this value is, but is kind of a percentage of the signal strength
|
||
|
|
* at the antenna.
|
||
|
|
*/
|
||
|
|
i1480u_SHOW(wlp_rssi, stats_show, rssi_stats);
|
||
|
|
i1480u_STORE(wlp_rssi, stats_store, rssi_stats);
|
||
|
|
i1480u_ATTR(wlp_rssi, S_IRUGO | S_IWUSR);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* We maintain a basic flow control counter. "count" how many TX URBs are
|
||
|
|
* outstanding. Only allow "max"
|
||
|
|
* TX URBs to be outstanding. If this value is reached the queue will be
|
||
|
|
* stopped. The queue will be restarted when there are
|
||
|
|
* "threshold" URBs outstanding.
|
||
|
|
*/
|
||
|
|
i1480u_SHOW(wlp_tx_inflight, wlp_tx_inflight_show, tx_inflight);
|
||
|
|
i1480u_STORE(wlp_tx_inflight, wlp_tx_inflight_store, tx_inflight);
|
||
|
|
i1480u_ATTR(wlp_tx_inflight, S_IRUGO | S_IWUSR);
|
||
|
|
|
||
|
|
static struct attribute *i1480u_attrs[] = {
|
||
|
|
&i1480u_ATTR_NAME(uwb_phy_rate).attr,
|
||
|
|
&i1480u_ATTR_NAME(uwb_rts_cts).attr,
|
||
|
|
&i1480u_ATTR_NAME(uwb_ack_policy).attr,
|
||
|
|
&i1480u_ATTR_NAME(uwb_pca_base_priority).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_lqe).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_rssi).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_eda).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_uuid).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_name).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_manufacturer).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_model_name).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_model_nr).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_serial).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_prim_category).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_prim_OUI).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_prim_OUI_sub).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_dev_prim_subcat).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_neighborhood).attr,
|
||
|
|
&i1480u_ATTR_NAME(wss_activate).attr,
|
||
|
|
&i1480u_ATTR_NAME(wlp_tx_inflight).attr,
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct attribute_group i1480u_attr_group = {
|
||
|
|
.name = NULL, /* we want them in the same directory */
|
||
|
|
.attrs = i1480u_attrs,
|
||
|
|
};
|
||
|
|
|
||
|
|
int i1480u_sysfs_setup(struct i1480u *i1480u)
|
||
|
|
{
|
||
|
|
int result;
|
||
|
|
struct device *dev = &i1480u->usb_iface->dev;
|
||
|
|
result = sysfs_create_group(&i1480u->net_dev->dev.kobj,
|
||
|
|
&i1480u_attr_group);
|
||
|
|
if (result < 0)
|
||
|
|
dev_err(dev, "cannot initialize sysfs attributes: %d\n",
|
||
|
|
result);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void i1480u_sysfs_release(struct i1480u *i1480u)
|
||
|
|
{
|
||
|
|
sysfs_remove_group(&i1480u->net_dev->dev.kobj,
|
||
|
|
&i1480u_attr_group);
|
||
|
|
}
|