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https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
![Mika Westerberg](/assets/img/avatar_default.png)
Intel pre-USB4 routers only have ROUTER_CS_0 up to ROUTER_CS_4 and it immediately follows the TMU router registers. Correct this accordingly. Reported-by: Rajaram Regupathy <rajaram.regupathy@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
1601 lines
38 KiB
C
1601 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Debugfs interface
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*
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* Copyright (C) 2020, Intel Corporation
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* Authors: Gil Fine <gil.fine@intel.com>
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* Mika Westerberg <mika.westerberg@linux.intel.com>
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*/
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#include <linux/debugfs.h>
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#include <linux/pm_runtime.h>
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#include <linux/uaccess.h>
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#include "tb.h"
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#include "sb_regs.h"
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#define PORT_CAP_V1_PCIE_LEN 1
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#define PORT_CAP_V2_PCIE_LEN 2
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#define PORT_CAP_POWER_LEN 2
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#define PORT_CAP_LANE_LEN 3
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#define PORT_CAP_USB3_LEN 5
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#define PORT_CAP_DP_V1_LEN 9
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#define PORT_CAP_DP_V2_LEN 14
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#define PORT_CAP_TMU_V1_LEN 8
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#define PORT_CAP_TMU_V2_LEN 10
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#define PORT_CAP_BASIC_LEN 9
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#define PORT_CAP_USB4_LEN 20
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#define SWITCH_CAP_TMU_LEN 26
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#define SWITCH_CAP_BASIC_LEN 27
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#define PATH_LEN 2
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#define COUNTER_SET_LEN 3
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#define DEBUGFS_ATTR(__space, __write) \
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static int __space ## _open(struct inode *inode, struct file *file) \
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{ \
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return single_open(file, __space ## _show, inode->i_private); \
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} \
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\
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static const struct file_operations __space ## _fops = { \
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.owner = THIS_MODULE, \
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.open = __space ## _open, \
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.release = single_release, \
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.read = seq_read, \
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.write = __write, \
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.llseek = seq_lseek, \
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}
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#define DEBUGFS_ATTR_RO(__space) \
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DEBUGFS_ATTR(__space, NULL)
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#define DEBUGFS_ATTR_RW(__space) \
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DEBUGFS_ATTR(__space, __space ## _write)
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static struct dentry *tb_debugfs_root;
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static void *validate_and_copy_from_user(const void __user *user_buf,
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size_t *count)
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{
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size_t nbytes;
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void *buf;
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if (!*count)
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return ERR_PTR(-EINVAL);
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if (!access_ok(user_buf, *count))
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return ERR_PTR(-EFAULT);
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buf = (void *)get_zeroed_page(GFP_KERNEL);
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if (!buf)
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return ERR_PTR(-ENOMEM);
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nbytes = min_t(size_t, *count, PAGE_SIZE);
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if (copy_from_user(buf, user_buf, nbytes)) {
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free_page((unsigned long)buf);
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return ERR_PTR(-EFAULT);
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}
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*count = nbytes;
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return buf;
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}
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static bool parse_line(char **line, u32 *offs, u32 *val, int short_fmt_len,
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int long_fmt_len)
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{
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char *token;
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u32 v[5];
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int ret;
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token = strsep(line, "\n");
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if (!token)
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return false;
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/*
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* For Adapter/Router configuration space:
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* Short format is: offset value\n
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* v[0] v[1]
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* Long format as produced from the read side:
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* offset relative_offset cap_id vs_cap_id value\n
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* v[0] v[1] v[2] v[3] v[4]
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*
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* For Counter configuration space:
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* Short format is: offset\n
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* v[0]
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* Long format as produced from the read side:
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* offset relative_offset counter_id value\n
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* v[0] v[1] v[2] v[3]
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*/
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ret = sscanf(token, "%i %i %i %i %i", &v[0], &v[1], &v[2], &v[3], &v[4]);
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/* In case of Counters, clear counter, "val" content is NA */
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if (ret == short_fmt_len) {
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*offs = v[0];
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*val = v[short_fmt_len - 1];
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return true;
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} else if (ret == long_fmt_len) {
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*offs = v[0];
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*val = v[long_fmt_len - 1];
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return true;
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}
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return false;
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}
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#if IS_ENABLED(CONFIG_USB4_DEBUGFS_WRITE)
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static ssize_t regs_write(struct tb_switch *sw, struct tb_port *port,
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const char __user *user_buf, size_t count,
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loff_t *ppos)
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{
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struct tb *tb = sw->tb;
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char *line, *buf;
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u32 val, offset;
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int ret = 0;
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buf = validate_and_copy_from_user(user_buf, &count);
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if (IS_ERR(buf))
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return PTR_ERR(buf);
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pm_runtime_get_sync(&sw->dev);
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if (mutex_lock_interruptible(&tb->lock)) {
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ret = -ERESTARTSYS;
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goto out;
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}
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/* User did hardware changes behind the driver's back */
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add_taint(TAINT_USER, LOCKDEP_STILL_OK);
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line = buf;
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while (parse_line(&line, &offset, &val, 2, 5)) {
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if (port)
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ret = tb_port_write(port, &val, TB_CFG_PORT, offset, 1);
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else
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ret = tb_sw_write(sw, &val, TB_CFG_SWITCH, offset, 1);
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if (ret)
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break;
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}
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mutex_unlock(&tb->lock);
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out:
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pm_runtime_mark_last_busy(&sw->dev);
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pm_runtime_put_autosuspend(&sw->dev);
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free_page((unsigned long)buf);
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return ret < 0 ? ret : count;
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}
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static ssize_t port_regs_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct tb_port *port = s->private;
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return regs_write(port->sw, port, user_buf, count, ppos);
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}
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static ssize_t switch_regs_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct tb_switch *sw = s->private;
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return regs_write(sw, NULL, user_buf, count, ppos);
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}
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#define DEBUGFS_MODE 0600
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#else
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#define port_regs_write NULL
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#define switch_regs_write NULL
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#define DEBUGFS_MODE 0400
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#endif
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#if IS_ENABLED(CONFIG_USB4_DEBUGFS_MARGINING)
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/**
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* struct tb_margining - Lane margining support
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* @caps: Port lane margining capabilities
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* @results: Last lane margining results
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* @lanes: %0, %1 or %7 (all)
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* @min_ber_level: Minimum supported BER level contour value
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* @max_ber_level: Maximum supported BER level contour value
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* @ber_level: Current BER level contour value
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* @voltage_steps: Number of mandatory voltage steps
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* @max_voltage_offset: Maximum mandatory voltage offset (in mV)
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* @time_steps: Number of time margin steps
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* @max_time_offset: Maximum time margin offset (in mUI)
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* @software: %true if software margining is used instead of hardware
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* @time: %true if time margining is used instead of voltage
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* @right_high: %false if left/low margin test is performed, %true if
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* right/high
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*/
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struct tb_margining {
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u32 caps[2];
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u32 results[2];
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unsigned int lanes;
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unsigned int min_ber_level;
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unsigned int max_ber_level;
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unsigned int ber_level;
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unsigned int voltage_steps;
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unsigned int max_voltage_offset;
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unsigned int time_steps;
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unsigned int max_time_offset;
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bool software;
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bool time;
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bool right_high;
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};
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static bool supports_software(const struct usb4_port *usb4)
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{
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return usb4->margining->caps[0] & USB4_MARGIN_CAP_0_MODES_SW;
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}
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static bool supports_hardware(const struct usb4_port *usb4)
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{
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return usb4->margining->caps[0] & USB4_MARGIN_CAP_0_MODES_HW;
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}
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static bool both_lanes(const struct usb4_port *usb4)
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{
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return usb4->margining->caps[0] & USB4_MARGIN_CAP_0_2_LANES;
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}
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static unsigned int independent_voltage_margins(const struct usb4_port *usb4)
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{
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return (usb4->margining->caps[0] & USB4_MARGIN_CAP_0_VOLTAGE_INDP_MASK) >>
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USB4_MARGIN_CAP_0_VOLTAGE_INDP_SHIFT;
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}
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static bool supports_time(const struct usb4_port *usb4)
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{
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return usb4->margining->caps[0] & USB4_MARGIN_CAP_0_TIME;
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}
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/* Only applicable if supports_time() returns true */
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static unsigned int independent_time_margins(const struct usb4_port *usb4)
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{
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return (usb4->margining->caps[1] & USB4_MARGIN_CAP_1_TIME_INDP_MASK) >>
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USB4_MARGIN_CAP_1_TIME_INDP_SHIFT;
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}
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static ssize_t
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margining_ber_level_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct tb_port *port = s->private;
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struct usb4_port *usb4 = port->usb4;
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struct tb *tb = port->sw->tb;
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unsigned int val;
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int ret = 0;
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char *buf;
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if (mutex_lock_interruptible(&tb->lock))
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return -ERESTARTSYS;
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if (usb4->margining->software) {
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ret = -EINVAL;
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goto out_unlock;
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}
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buf = validate_and_copy_from_user(user_buf, &count);
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if (IS_ERR(buf)) {
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ret = PTR_ERR(buf);
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goto out_unlock;
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}
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buf[count - 1] = '\0';
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ret = kstrtouint(buf, 10, &val);
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if (ret)
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goto out_free;
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if (val < usb4->margining->min_ber_level ||
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val > usb4->margining->max_ber_level) {
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ret = -EINVAL;
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goto out_free;
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}
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usb4->margining->ber_level = val;
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out_free:
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free_page((unsigned long)buf);
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out_unlock:
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mutex_unlock(&tb->lock);
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return ret < 0 ? ret : count;
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}
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static void ber_level_show(struct seq_file *s, unsigned int val)
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{
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if (val % 2)
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seq_printf(s, "3 * 1e%d (%u)\n", -12 + (val + 1) / 2, val);
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else
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seq_printf(s, "1e%d (%u)\n", -12 + val / 2, val);
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}
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static int margining_ber_level_show(struct seq_file *s, void *not_used)
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{
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struct tb_port *port = s->private;
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struct usb4_port *usb4 = port->usb4;
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if (usb4->margining->software)
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return -EINVAL;
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ber_level_show(s, usb4->margining->ber_level);
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return 0;
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}
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DEBUGFS_ATTR_RW(margining_ber_level);
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static int margining_caps_show(struct seq_file *s, void *not_used)
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{
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struct tb_port *port = s->private;
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struct usb4_port *usb4 = port->usb4;
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struct tb *tb = port->sw->tb;
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u32 cap0, cap1;
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if (mutex_lock_interruptible(&tb->lock))
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return -ERESTARTSYS;
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/* Dump the raw caps first */
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cap0 = usb4->margining->caps[0];
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seq_printf(s, "0x%08x\n", cap0);
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cap1 = usb4->margining->caps[1];
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seq_printf(s, "0x%08x\n", cap1);
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seq_printf(s, "# software margining: %s\n",
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supports_software(usb4) ? "yes" : "no");
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if (supports_hardware(usb4)) {
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seq_puts(s, "# hardware margining: yes\n");
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seq_puts(s, "# minimum BER level contour: ");
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ber_level_show(s, usb4->margining->min_ber_level);
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seq_puts(s, "# maximum BER level contour: ");
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ber_level_show(s, usb4->margining->max_ber_level);
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} else {
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seq_puts(s, "# hardware margining: no\n");
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}
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seq_printf(s, "# both lanes simultaneously: %s\n",
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both_lanes(usb4) ? "yes" : "no");
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seq_printf(s, "# voltage margin steps: %u\n",
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usb4->margining->voltage_steps);
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seq_printf(s, "# maximum voltage offset: %u mV\n",
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usb4->margining->max_voltage_offset);
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switch (independent_voltage_margins(usb4)) {
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case USB4_MARGIN_CAP_0_VOLTAGE_MIN:
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seq_puts(s, "# returns minimum between high and low voltage margins\n");
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break;
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case USB4_MARGIN_CAP_0_VOLTAGE_HL:
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seq_puts(s, "# returns high or low voltage margin\n");
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break;
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case USB4_MARGIN_CAP_0_VOLTAGE_BOTH:
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seq_puts(s, "# returns both high and low margins\n");
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break;
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}
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if (supports_time(usb4)) {
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seq_puts(s, "# time margining: yes\n");
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seq_printf(s, "# time margining is destructive: %s\n",
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cap1 & USB4_MARGIN_CAP_1_TIME_DESTR ? "yes" : "no");
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switch (independent_time_margins(usb4)) {
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case USB4_MARGIN_CAP_1_TIME_MIN:
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seq_puts(s, "# returns minimum between left and right time margins\n");
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break;
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case USB4_MARGIN_CAP_1_TIME_LR:
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seq_puts(s, "# returns left or right margin\n");
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break;
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case USB4_MARGIN_CAP_1_TIME_BOTH:
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seq_puts(s, "# returns both left and right margins\n");
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break;
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}
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seq_printf(s, "# time margin steps: %u\n",
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usb4->margining->time_steps);
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seq_printf(s, "# maximum time offset: %u mUI\n",
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usb4->margining->max_time_offset);
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} else {
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seq_puts(s, "# time margining: no\n");
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}
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mutex_unlock(&tb->lock);
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return 0;
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}
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DEBUGFS_ATTR_RO(margining_caps);
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static ssize_t
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margining_lanes_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct tb_port *port = s->private;
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struct usb4_port *usb4 = port->usb4;
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struct tb *tb = port->sw->tb;
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int ret = 0;
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char *buf;
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buf = validate_and_copy_from_user(user_buf, &count);
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if (IS_ERR(buf))
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return PTR_ERR(buf);
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buf[count - 1] = '\0';
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|
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if (mutex_lock_interruptible(&tb->lock)) {
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ret = -ERESTARTSYS;
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goto out_free;
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}
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if (!strcmp(buf, "0")) {
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usb4->margining->lanes = 0;
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} else if (!strcmp(buf, "1")) {
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usb4->margining->lanes = 1;
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} else if (!strcmp(buf, "all")) {
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/* Needs to be supported */
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if (both_lanes(usb4))
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usb4->margining->lanes = 7;
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else
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ret = -EINVAL;
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} else {
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ret = -EINVAL;
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}
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mutex_unlock(&tb->lock);
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out_free:
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free_page((unsigned long)buf);
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return ret < 0 ? ret : count;
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}
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static int margining_lanes_show(struct seq_file *s, void *not_used)
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{
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struct tb_port *port = s->private;
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struct usb4_port *usb4 = port->usb4;
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struct tb *tb = port->sw->tb;
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unsigned int lanes;
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if (mutex_lock_interruptible(&tb->lock))
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return -ERESTARTSYS;
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|
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lanes = usb4->margining->lanes;
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if (both_lanes(usb4)) {
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if (!lanes)
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seq_puts(s, "[0] 1 all\n");
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else if (lanes == 1)
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seq_puts(s, "0 [1] all\n");
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else
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seq_puts(s, "0 1 [all]\n");
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} else {
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if (!lanes)
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seq_puts(s, "[0] 1\n");
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else
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seq_puts(s, "0 [1]\n");
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}
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mutex_unlock(&tb->lock);
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return 0;
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}
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DEBUGFS_ATTR_RW(margining_lanes);
|
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|
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static ssize_t margining_mode_write(struct file *file,
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const char __user *user_buf,
|
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size_t count, loff_t *ppos)
|
|
{
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struct seq_file *s = file->private_data;
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struct tb_port *port = s->private;
|
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struct usb4_port *usb4 = port->usb4;
|
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struct tb *tb = port->sw->tb;
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int ret = 0;
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char *buf;
|
|
|
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buf = validate_and_copy_from_user(user_buf, &count);
|
|
if (IS_ERR(buf))
|
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return PTR_ERR(buf);
|
|
|
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buf[count - 1] = '\0';
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_free;
|
|
}
|
|
|
|
if (!strcmp(buf, "software")) {
|
|
if (supports_software(usb4))
|
|
usb4->margining->software = true;
|
|
else
|
|
ret = -EINVAL;
|
|
} else if (!strcmp(buf, "hardware")) {
|
|
if (supports_hardware(usb4))
|
|
usb4->margining->software = false;
|
|
else
|
|
ret = -EINVAL;
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
out_free:
|
|
free_page((unsigned long)buf);
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static int margining_mode_show(struct seq_file *s, void *not_used)
|
|
{
|
|
const struct tb_port *port = s->private;
|
|
const struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
const char *space = "";
|
|
|
|
if (mutex_lock_interruptible(&tb->lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (supports_software(usb4)) {
|
|
if (usb4->margining->software)
|
|
seq_puts(s, "[software]");
|
|
else
|
|
seq_puts(s, "software");
|
|
space = " ";
|
|
}
|
|
if (supports_hardware(usb4)) {
|
|
if (usb4->margining->software)
|
|
seq_printf(s, "%shardware", space);
|
|
else
|
|
seq_printf(s, "%s[hardware]", space);
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
seq_puts(s, "\n");
|
|
return 0;
|
|
}
|
|
DEBUGFS_ATTR_RW(margining_mode);
|
|
|
|
static int margining_run_write(void *data, u64 val)
|
|
{
|
|
struct tb_port *port = data;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb_switch *sw = port->sw;
|
|
struct tb_margining *margining;
|
|
struct tb_switch *down_sw;
|
|
struct tb *tb = sw->tb;
|
|
int ret, clx;
|
|
|
|
if (val != 1)
|
|
return -EINVAL;
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_rpm_put;
|
|
}
|
|
|
|
if (tb_is_upstream_port(port))
|
|
down_sw = sw;
|
|
else if (port->remote)
|
|
down_sw = port->remote->sw;
|
|
else
|
|
down_sw = NULL;
|
|
|
|
if (down_sw) {
|
|
/*
|
|
* CL states may interfere with lane margining so
|
|
* disable them temporarily now.
|
|
*/
|
|
ret = tb_switch_clx_disable(down_sw);
|
|
if (ret < 0) {
|
|
tb_sw_warn(down_sw, "failed to disable CL states\n");
|
|
goto out_unlock;
|
|
}
|
|
clx = ret;
|
|
}
|
|
|
|
margining = usb4->margining;
|
|
|
|
if (margining->software) {
|
|
tb_port_dbg(port, "running software %s lane margining for lanes %u\n",
|
|
margining->time ? "time" : "voltage", margining->lanes);
|
|
ret = usb4_port_sw_margin(port, margining->lanes, margining->time,
|
|
margining->right_high,
|
|
USB4_MARGIN_SW_COUNTER_CLEAR);
|
|
if (ret)
|
|
goto out_clx;
|
|
|
|
ret = usb4_port_sw_margin_errors(port, &margining->results[0]);
|
|
} else {
|
|
tb_port_dbg(port, "running hardware %s lane margining for lanes %u\n",
|
|
margining->time ? "time" : "voltage", margining->lanes);
|
|
/* Clear the results */
|
|
margining->results[0] = 0;
|
|
margining->results[1] = 0;
|
|
ret = usb4_port_hw_margin(port, margining->lanes,
|
|
margining->ber_level, margining->time,
|
|
margining->right_high, margining->results);
|
|
}
|
|
|
|
out_clx:
|
|
if (down_sw)
|
|
tb_switch_clx_enable(down_sw, clx);
|
|
out_unlock:
|
|
mutex_unlock(&tb->lock);
|
|
out_rpm_put:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
|
|
return ret;
|
|
}
|
|
DEFINE_DEBUGFS_ATTRIBUTE(margining_run_fops, NULL, margining_run_write,
|
|
"%llu\n");
|
|
|
|
static ssize_t margining_results_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *s = file->private_data;
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
|
|
if (mutex_lock_interruptible(&tb->lock))
|
|
return -ERESTARTSYS;
|
|
|
|
/* Just clear the results */
|
|
usb4->margining->results[0] = 0;
|
|
usb4->margining->results[1] = 0;
|
|
|
|
mutex_unlock(&tb->lock);
|
|
return count;
|
|
}
|
|
|
|
static void voltage_margin_show(struct seq_file *s,
|
|
const struct tb_margining *margining, u8 val)
|
|
{
|
|
unsigned int tmp, voltage;
|
|
|
|
tmp = val & USB4_MARGIN_HW_RES_1_MARGIN_MASK;
|
|
voltage = tmp * margining->max_voltage_offset / margining->voltage_steps;
|
|
seq_printf(s, "%u mV (%u)", voltage, tmp);
|
|
if (val & USB4_MARGIN_HW_RES_1_EXCEEDS)
|
|
seq_puts(s, " exceeds maximum");
|
|
seq_puts(s, "\n");
|
|
}
|
|
|
|
static void time_margin_show(struct seq_file *s,
|
|
const struct tb_margining *margining, u8 val)
|
|
{
|
|
unsigned int tmp, interval;
|
|
|
|
tmp = val & USB4_MARGIN_HW_RES_1_MARGIN_MASK;
|
|
interval = tmp * margining->max_time_offset / margining->time_steps;
|
|
seq_printf(s, "%u mUI (%u)", interval, tmp);
|
|
if (val & USB4_MARGIN_HW_RES_1_EXCEEDS)
|
|
seq_puts(s, " exceeds maximum");
|
|
seq_puts(s, "\n");
|
|
}
|
|
|
|
static int margining_results_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb_margining *margining;
|
|
struct tb *tb = port->sw->tb;
|
|
|
|
if (mutex_lock_interruptible(&tb->lock))
|
|
return -ERESTARTSYS;
|
|
|
|
margining = usb4->margining;
|
|
/* Dump the raw results first */
|
|
seq_printf(s, "0x%08x\n", margining->results[0]);
|
|
/* Only the hardware margining has two result dwords */
|
|
if (!margining->software) {
|
|
unsigned int val;
|
|
|
|
seq_printf(s, "0x%08x\n", margining->results[1]);
|
|
|
|
if (margining->time) {
|
|
if (!margining->lanes || margining->lanes == 7) {
|
|
val = margining->results[1];
|
|
seq_puts(s, "# lane 0 right time margin: ");
|
|
time_margin_show(s, margining, val);
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L0_LL_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 0 left time margin: ");
|
|
time_margin_show(s, margining, val);
|
|
}
|
|
if (margining->lanes == 1 || margining->lanes == 7) {
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L1_RH_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 1 right time margin: ");
|
|
time_margin_show(s, margining, val);
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L1_LL_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 1 left time margin: ");
|
|
time_margin_show(s, margining, val);
|
|
}
|
|
} else {
|
|
if (!margining->lanes || margining->lanes == 7) {
|
|
val = margining->results[1];
|
|
seq_puts(s, "# lane 0 high voltage margin: ");
|
|
voltage_margin_show(s, margining, val);
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L0_LL_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 0 low voltage margin: ");
|
|
voltage_margin_show(s, margining, val);
|
|
}
|
|
if (margining->lanes == 1 || margining->lanes == 7) {
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L1_RH_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 1 high voltage margin: ");
|
|
voltage_margin_show(s, margining, val);
|
|
val = margining->results[1] >>
|
|
USB4_MARGIN_HW_RES_1_L1_LL_MARGIN_SHIFT;
|
|
seq_puts(s, "# lane 1 low voltage margin: ");
|
|
voltage_margin_show(s, margining, val);
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
return 0;
|
|
}
|
|
DEBUGFS_ATTR_RW(margining_results);
|
|
|
|
static ssize_t margining_test_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *s = file->private_data;
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
int ret = 0;
|
|
char *buf;
|
|
|
|
buf = validate_and_copy_from_user(user_buf, &count);
|
|
if (IS_ERR(buf))
|
|
return PTR_ERR(buf);
|
|
|
|
buf[count - 1] = '\0';
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_free;
|
|
}
|
|
|
|
if (!strcmp(buf, "time") && supports_time(usb4))
|
|
usb4->margining->time = true;
|
|
else if (!strcmp(buf, "voltage"))
|
|
usb4->margining->time = false;
|
|
else
|
|
ret = -EINVAL;
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
out_free:
|
|
free_page((unsigned long)buf);
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static int margining_test_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
|
|
if (mutex_lock_interruptible(&tb->lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (supports_time(usb4)) {
|
|
if (usb4->margining->time)
|
|
seq_puts(s, "voltage [time]\n");
|
|
else
|
|
seq_puts(s, "[voltage] time\n");
|
|
} else {
|
|
seq_puts(s, "[voltage]\n");
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
return 0;
|
|
}
|
|
DEBUGFS_ATTR_RW(margining_test);
|
|
|
|
static ssize_t margining_margin_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *s = file->private_data;
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
int ret = 0;
|
|
char *buf;
|
|
|
|
buf = validate_and_copy_from_user(user_buf, &count);
|
|
if (IS_ERR(buf))
|
|
return PTR_ERR(buf);
|
|
|
|
buf[count - 1] = '\0';
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_free;
|
|
}
|
|
|
|
if (usb4->margining->time) {
|
|
if (!strcmp(buf, "left"))
|
|
usb4->margining->right_high = false;
|
|
else if (!strcmp(buf, "right"))
|
|
usb4->margining->right_high = true;
|
|
else
|
|
ret = -EINVAL;
|
|
} else {
|
|
if (!strcmp(buf, "low"))
|
|
usb4->margining->right_high = false;
|
|
else if (!strcmp(buf, "high"))
|
|
usb4->margining->right_high = true;
|
|
else
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
out_free:
|
|
free_page((unsigned long)buf);
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static int margining_margin_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct usb4_port *usb4 = port->usb4;
|
|
struct tb *tb = port->sw->tb;
|
|
|
|
if (mutex_lock_interruptible(&tb->lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (usb4->margining->time) {
|
|
if (usb4->margining->right_high)
|
|
seq_puts(s, "left [right]\n");
|
|
else
|
|
seq_puts(s, "[left] right\n");
|
|
} else {
|
|
if (usb4->margining->right_high)
|
|
seq_puts(s, "low [high]\n");
|
|
else
|
|
seq_puts(s, "[low] high\n");
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
return 0;
|
|
}
|
|
DEBUGFS_ATTR_RW(margining_margin);
|
|
|
|
static void margining_port_init(struct tb_port *port)
|
|
{
|
|
struct tb_margining *margining;
|
|
struct dentry *dir, *parent;
|
|
struct usb4_port *usb4;
|
|
char dir_name[10];
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
usb4 = port->usb4;
|
|
if (!usb4)
|
|
return;
|
|
|
|
snprintf(dir_name, sizeof(dir_name), "port%d", port->port);
|
|
parent = debugfs_lookup(dir_name, port->sw->debugfs_dir);
|
|
|
|
margining = kzalloc(sizeof(*margining), GFP_KERNEL);
|
|
if (!margining)
|
|
return;
|
|
|
|
ret = usb4_port_margining_caps(port, margining->caps);
|
|
if (ret) {
|
|
kfree(margining);
|
|
return;
|
|
}
|
|
|
|
usb4->margining = margining;
|
|
|
|
/* Set the initial mode */
|
|
if (supports_software(usb4))
|
|
margining->software = true;
|
|
|
|
val = (margining->caps[0] & USB4_MARGIN_CAP_0_VOLTAGE_STEPS_MASK) >>
|
|
USB4_MARGIN_CAP_0_VOLTAGE_STEPS_SHIFT;
|
|
margining->voltage_steps = val;
|
|
val = (margining->caps[0] & USB4_MARGIN_CAP_0_MAX_VOLTAGE_OFFSET_MASK) >>
|
|
USB4_MARGIN_CAP_0_MAX_VOLTAGE_OFFSET_SHIFT;
|
|
margining->max_voltage_offset = 74 + val * 2;
|
|
|
|
if (supports_time(usb4)) {
|
|
val = (margining->caps[1] & USB4_MARGIN_CAP_1_TIME_STEPS_MASK) >>
|
|
USB4_MARGIN_CAP_1_TIME_STEPS_SHIFT;
|
|
margining->time_steps = val;
|
|
val = (margining->caps[1] & USB4_MARGIN_CAP_1_TIME_OFFSET_MASK) >>
|
|
USB4_MARGIN_CAP_1_TIME_OFFSET_SHIFT;
|
|
/*
|
|
* Store it as mUI (milli Unit Interval) because we want
|
|
* to keep it as integer.
|
|
*/
|
|
margining->max_time_offset = 200 + 10 * val;
|
|
}
|
|
|
|
dir = debugfs_create_dir("margining", parent);
|
|
if (supports_hardware(usb4)) {
|
|
val = (margining->caps[1] & USB4_MARGIN_CAP_1_MIN_BER_MASK) >>
|
|
USB4_MARGIN_CAP_1_MIN_BER_SHIFT;
|
|
margining->min_ber_level = val;
|
|
val = (margining->caps[1] & USB4_MARGIN_CAP_1_MAX_BER_MASK) >>
|
|
USB4_MARGIN_CAP_1_MAX_BER_SHIFT;
|
|
margining->max_ber_level = val;
|
|
|
|
/* Set the default to minimum */
|
|
margining->ber_level = margining->min_ber_level;
|
|
|
|
debugfs_create_file("ber_level_contour", 0400, dir, port,
|
|
&margining_ber_level_fops);
|
|
}
|
|
debugfs_create_file("caps", 0400, dir, port, &margining_caps_fops);
|
|
debugfs_create_file("lanes", 0600, dir, port, &margining_lanes_fops);
|
|
debugfs_create_file("mode", 0600, dir, port, &margining_mode_fops);
|
|
debugfs_create_file("run", 0600, dir, port, &margining_run_fops);
|
|
debugfs_create_file("results", 0600, dir, port, &margining_results_fops);
|
|
debugfs_create_file("test", 0600, dir, port, &margining_test_fops);
|
|
if (independent_voltage_margins(usb4) ||
|
|
(supports_time(usb4) && independent_time_margins(usb4)))
|
|
debugfs_create_file("margin", 0600, dir, port, &margining_margin_fops);
|
|
}
|
|
|
|
static void margining_port_remove(struct tb_port *port)
|
|
{
|
|
struct dentry *parent;
|
|
char dir_name[10];
|
|
|
|
if (!port->usb4)
|
|
return;
|
|
|
|
snprintf(dir_name, sizeof(dir_name), "port%d", port->port);
|
|
parent = debugfs_lookup(dir_name, port->sw->debugfs_dir);
|
|
if (parent)
|
|
debugfs_lookup_and_remove("margining", parent);
|
|
|
|
kfree(port->usb4->margining);
|
|
port->usb4->margining = NULL;
|
|
}
|
|
|
|
static void margining_switch_init(struct tb_switch *sw)
|
|
{
|
|
struct tb_port *upstream, *downstream;
|
|
struct tb_switch *parent_sw;
|
|
u64 route = tb_route(sw);
|
|
|
|
if (!route)
|
|
return;
|
|
|
|
upstream = tb_upstream_port(sw);
|
|
parent_sw = tb_switch_parent(sw);
|
|
downstream = tb_port_at(route, parent_sw);
|
|
|
|
margining_port_init(downstream);
|
|
margining_port_init(upstream);
|
|
}
|
|
|
|
static void margining_switch_remove(struct tb_switch *sw)
|
|
{
|
|
struct tb_port *upstream, *downstream;
|
|
struct tb_switch *parent_sw;
|
|
u64 route = tb_route(sw);
|
|
|
|
if (!route)
|
|
return;
|
|
|
|
upstream = tb_upstream_port(sw);
|
|
parent_sw = tb_switch_parent(sw);
|
|
downstream = tb_port_at(route, parent_sw);
|
|
|
|
margining_port_remove(upstream);
|
|
margining_port_remove(downstream);
|
|
}
|
|
|
|
static void margining_xdomain_init(struct tb_xdomain *xd)
|
|
{
|
|
struct tb_switch *parent_sw;
|
|
struct tb_port *downstream;
|
|
|
|
parent_sw = tb_xdomain_parent(xd);
|
|
downstream = tb_port_at(xd->route, parent_sw);
|
|
|
|
margining_port_init(downstream);
|
|
}
|
|
|
|
static void margining_xdomain_remove(struct tb_xdomain *xd)
|
|
{
|
|
struct tb_switch *parent_sw;
|
|
struct tb_port *downstream;
|
|
|
|
parent_sw = tb_xdomain_parent(xd);
|
|
downstream = tb_port_at(xd->route, parent_sw);
|
|
margining_port_remove(downstream);
|
|
}
|
|
#else
|
|
static inline void margining_switch_init(struct tb_switch *sw) { }
|
|
static inline void margining_switch_remove(struct tb_switch *sw) { }
|
|
static inline void margining_xdomain_init(struct tb_xdomain *xd) { }
|
|
static inline void margining_xdomain_remove(struct tb_xdomain *xd) { }
|
|
#endif
|
|
|
|
static int port_clear_all_counters(struct tb_port *port)
|
|
{
|
|
u32 *buf;
|
|
int ret;
|
|
|
|
buf = kcalloc(COUNTER_SET_LEN * port->config.max_counters, sizeof(u32),
|
|
GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
ret = tb_port_write(port, buf, TB_CFG_COUNTERS, 0,
|
|
COUNTER_SET_LEN * port->config.max_counters);
|
|
kfree(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t counters_write(struct file *file, const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *s = file->private_data;
|
|
struct tb_port *port = s->private;
|
|
struct tb_switch *sw = port->sw;
|
|
struct tb *tb = port->sw->tb;
|
|
char *buf;
|
|
int ret;
|
|
|
|
buf = validate_and_copy_from_user(user_buf, &count);
|
|
if (IS_ERR(buf))
|
|
return PTR_ERR(buf);
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out;
|
|
}
|
|
|
|
/* If written delimiter only, clear all counters in one shot */
|
|
if (buf[0] == '\n') {
|
|
ret = port_clear_all_counters(port);
|
|
} else {
|
|
char *line = buf;
|
|
u32 val, offset;
|
|
|
|
ret = -EINVAL;
|
|
while (parse_line(&line, &offset, &val, 1, 4)) {
|
|
ret = tb_port_write(port, &val, TB_CFG_COUNTERS,
|
|
offset, 1);
|
|
if (ret)
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
out:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
free_page((unsigned long)buf);
|
|
|
|
return ret < 0 ? ret : count;
|
|
}
|
|
|
|
static void cap_show_by_dw(struct seq_file *s, struct tb_switch *sw,
|
|
struct tb_port *port, unsigned int cap,
|
|
unsigned int offset, u8 cap_id, u8 vsec_id,
|
|
int dwords)
|
|
{
|
|
int i, ret;
|
|
u32 data;
|
|
|
|
for (i = 0; i < dwords; i++) {
|
|
if (port)
|
|
ret = tb_port_read(port, &data, TB_CFG_PORT, cap + offset + i, 1);
|
|
else
|
|
ret = tb_sw_read(sw, &data, TB_CFG_SWITCH, cap + offset + i, 1);
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <not accessible>\n", cap + offset + i);
|
|
continue;
|
|
}
|
|
|
|
seq_printf(s, "0x%04x %4d 0x%02x 0x%02x 0x%08x\n", cap + offset + i,
|
|
offset + i, cap_id, vsec_id, data);
|
|
}
|
|
}
|
|
|
|
static void cap_show(struct seq_file *s, struct tb_switch *sw,
|
|
struct tb_port *port, unsigned int cap, u8 cap_id,
|
|
u8 vsec_id, int length)
|
|
{
|
|
int ret, offset = 0;
|
|
|
|
while (length > 0) {
|
|
int i, dwords = min(length, TB_MAX_CONFIG_RW_LENGTH);
|
|
u32 data[TB_MAX_CONFIG_RW_LENGTH];
|
|
|
|
if (port)
|
|
ret = tb_port_read(port, data, TB_CFG_PORT, cap + offset,
|
|
dwords);
|
|
else
|
|
ret = tb_sw_read(sw, data, TB_CFG_SWITCH, cap + offset, dwords);
|
|
if (ret) {
|
|
cap_show_by_dw(s, sw, port, cap, offset, cap_id, vsec_id, length);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < dwords; i++) {
|
|
seq_printf(s, "0x%04x %4d 0x%02x 0x%02x 0x%08x\n",
|
|
cap + offset + i, offset + i,
|
|
cap_id, vsec_id, data[i]);
|
|
}
|
|
|
|
length -= dwords;
|
|
offset += dwords;
|
|
}
|
|
}
|
|
|
|
static void port_cap_show(struct tb_port *port, struct seq_file *s,
|
|
unsigned int cap)
|
|
{
|
|
struct tb_cap_any header;
|
|
u8 vsec_id = 0;
|
|
size_t length;
|
|
int ret;
|
|
|
|
ret = tb_port_read(port, &header, TB_CFG_PORT, cap, 1);
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <capability read failed>\n", cap);
|
|
return;
|
|
}
|
|
|
|
switch (header.basic.cap) {
|
|
case TB_PORT_CAP_PHY:
|
|
length = PORT_CAP_LANE_LEN;
|
|
break;
|
|
|
|
case TB_PORT_CAP_TIME1:
|
|
if (usb4_switch_version(port->sw) < 2)
|
|
length = PORT_CAP_TMU_V1_LEN;
|
|
else
|
|
length = PORT_CAP_TMU_V2_LEN;
|
|
break;
|
|
|
|
case TB_PORT_CAP_POWER:
|
|
length = PORT_CAP_POWER_LEN;
|
|
break;
|
|
|
|
case TB_PORT_CAP_ADAP:
|
|
if (tb_port_is_pcie_down(port) || tb_port_is_pcie_up(port)) {
|
|
if (usb4_switch_version(port->sw) < 2)
|
|
length = PORT_CAP_V1_PCIE_LEN;
|
|
else
|
|
length = PORT_CAP_V2_PCIE_LEN;
|
|
} else if (tb_port_is_dpin(port)) {
|
|
if (usb4_switch_version(port->sw) < 2)
|
|
length = PORT_CAP_DP_V1_LEN;
|
|
else
|
|
length = PORT_CAP_DP_V2_LEN;
|
|
} else if (tb_port_is_dpout(port)) {
|
|
length = PORT_CAP_DP_V1_LEN;
|
|
} else if (tb_port_is_usb3_down(port) ||
|
|
tb_port_is_usb3_up(port)) {
|
|
length = PORT_CAP_USB3_LEN;
|
|
} else {
|
|
seq_printf(s, "0x%04x <unsupported capability 0x%02x>\n",
|
|
cap, header.basic.cap);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case TB_PORT_CAP_VSE:
|
|
if (!header.extended_short.length) {
|
|
ret = tb_port_read(port, (u32 *)&header + 1, TB_CFG_PORT,
|
|
cap + 1, 1);
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <capability read failed>\n",
|
|
cap + 1);
|
|
return;
|
|
}
|
|
length = header.extended_long.length;
|
|
vsec_id = header.extended_short.vsec_id;
|
|
} else {
|
|
length = header.extended_short.length;
|
|
vsec_id = header.extended_short.vsec_id;
|
|
}
|
|
break;
|
|
|
|
case TB_PORT_CAP_USB4:
|
|
length = PORT_CAP_USB4_LEN;
|
|
break;
|
|
|
|
default:
|
|
seq_printf(s, "0x%04x <unsupported capability 0x%02x>\n",
|
|
cap, header.basic.cap);
|
|
return;
|
|
}
|
|
|
|
cap_show(s, NULL, port, cap, header.basic.cap, vsec_id, length);
|
|
}
|
|
|
|
static void port_caps_show(struct tb_port *port, struct seq_file *s)
|
|
{
|
|
int cap;
|
|
|
|
cap = tb_port_next_cap(port, 0);
|
|
while (cap > 0) {
|
|
port_cap_show(port, s, cap);
|
|
cap = tb_port_next_cap(port, cap);
|
|
}
|
|
}
|
|
|
|
static int port_basic_regs_show(struct tb_port *port, struct seq_file *s)
|
|
{
|
|
u32 data[PORT_CAP_BASIC_LEN];
|
|
int ret, i;
|
|
|
|
ret = tb_port_read(port, data, TB_CFG_PORT, 0, ARRAY_SIZE(data));
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(data); i++)
|
|
seq_printf(s, "0x%04x %4d 0x00 0x00 0x%08x\n", i, i, data[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int port_regs_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct tb_switch *sw = port->sw;
|
|
struct tb *tb = sw->tb;
|
|
int ret;
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_rpm_put;
|
|
}
|
|
|
|
seq_puts(s, "# offset relative_offset cap_id vs_cap_id value\n");
|
|
|
|
ret = port_basic_regs_show(port, s);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
port_caps_show(port, s);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&tb->lock);
|
|
out_rpm_put:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
|
|
return ret;
|
|
}
|
|
DEBUGFS_ATTR_RW(port_regs);
|
|
|
|
static void switch_cap_show(struct tb_switch *sw, struct seq_file *s,
|
|
unsigned int cap)
|
|
{
|
|
struct tb_cap_any header;
|
|
int ret, length;
|
|
u8 vsec_id = 0;
|
|
|
|
ret = tb_sw_read(sw, &header, TB_CFG_SWITCH, cap, 1);
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <capability read failed>\n", cap);
|
|
return;
|
|
}
|
|
|
|
if (header.basic.cap == TB_SWITCH_CAP_VSE) {
|
|
if (!header.extended_short.length) {
|
|
ret = tb_sw_read(sw, (u32 *)&header + 1, TB_CFG_SWITCH,
|
|
cap + 1, 1);
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <capability read failed>\n",
|
|
cap + 1);
|
|
return;
|
|
}
|
|
length = header.extended_long.length;
|
|
} else {
|
|
length = header.extended_short.length;
|
|
}
|
|
vsec_id = header.extended_short.vsec_id;
|
|
} else {
|
|
if (header.basic.cap == TB_SWITCH_CAP_TMU) {
|
|
length = SWITCH_CAP_TMU_LEN;
|
|
} else {
|
|
seq_printf(s, "0x%04x <unknown capability 0x%02x>\n",
|
|
cap, header.basic.cap);
|
|
return;
|
|
}
|
|
}
|
|
|
|
cap_show(s, sw, NULL, cap, header.basic.cap, vsec_id, length);
|
|
}
|
|
|
|
static void switch_caps_show(struct tb_switch *sw, struct seq_file *s)
|
|
{
|
|
int cap;
|
|
|
|
cap = tb_switch_next_cap(sw, 0);
|
|
while (cap > 0) {
|
|
switch_cap_show(sw, s, cap);
|
|
cap = tb_switch_next_cap(sw, cap);
|
|
}
|
|
}
|
|
|
|
static int switch_basic_regs_show(struct tb_switch *sw, struct seq_file *s)
|
|
{
|
|
u32 data[SWITCH_CAP_BASIC_LEN];
|
|
size_t dwords;
|
|
int ret, i;
|
|
|
|
/* Only USB4 has the additional registers */
|
|
if (tb_switch_is_usb4(sw))
|
|
dwords = ARRAY_SIZE(data);
|
|
else
|
|
dwords = 5;
|
|
|
|
ret = tb_sw_read(sw, data, TB_CFG_SWITCH, 0, dwords);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < dwords; i++)
|
|
seq_printf(s, "0x%04x %4d 0x00 0x00 0x%08x\n", i, i, data[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int switch_regs_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_switch *sw = s->private;
|
|
struct tb *tb = sw->tb;
|
|
int ret;
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_rpm_put;
|
|
}
|
|
|
|
seq_puts(s, "# offset relative_offset cap_id vs_cap_id value\n");
|
|
|
|
ret = switch_basic_regs_show(sw, s);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
switch_caps_show(sw, s);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&tb->lock);
|
|
out_rpm_put:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
|
|
return ret;
|
|
}
|
|
DEBUGFS_ATTR_RW(switch_regs);
|
|
|
|
static int path_show_one(struct tb_port *port, struct seq_file *s, int hopid)
|
|
{
|
|
u32 data[PATH_LEN];
|
|
int ret, i;
|
|
|
|
ret = tb_port_read(port, data, TB_CFG_HOPS, hopid * PATH_LEN,
|
|
ARRAY_SIZE(data));
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <not accessible>\n", hopid * PATH_LEN);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(data); i++) {
|
|
seq_printf(s, "0x%04x %4d 0x%02x 0x%08x\n",
|
|
hopid * PATH_LEN + i, i, hopid, data[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int path_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct tb_switch *sw = port->sw;
|
|
struct tb *tb = sw->tb;
|
|
int start, i, ret = 0;
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out_rpm_put;
|
|
}
|
|
|
|
seq_puts(s, "# offset relative_offset in_hop_id value\n");
|
|
|
|
/* NHI and lane adapters have entry for path 0 */
|
|
if (tb_port_is_null(port) || tb_port_is_nhi(port)) {
|
|
ret = path_show_one(port, s, 0);
|
|
if (ret)
|
|
goto out_unlock;
|
|
}
|
|
|
|
start = tb_port_is_nhi(port) ? 1 : TB_PATH_MIN_HOPID;
|
|
|
|
for (i = start; i <= port->config.max_in_hop_id; i++) {
|
|
ret = path_show_one(port, s, i);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
out_unlock:
|
|
mutex_unlock(&tb->lock);
|
|
out_rpm_put:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
|
|
return ret;
|
|
}
|
|
DEBUGFS_ATTR_RO(path);
|
|
|
|
static int counter_set_regs_show(struct tb_port *port, struct seq_file *s,
|
|
int counter)
|
|
{
|
|
u32 data[COUNTER_SET_LEN];
|
|
int ret, i;
|
|
|
|
ret = tb_port_read(port, data, TB_CFG_COUNTERS,
|
|
counter * COUNTER_SET_LEN, ARRAY_SIZE(data));
|
|
if (ret) {
|
|
seq_printf(s, "0x%04x <not accessible>\n",
|
|
counter * COUNTER_SET_LEN);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(data); i++) {
|
|
seq_printf(s, "0x%04x %4d 0x%02x 0x%08x\n",
|
|
counter * COUNTER_SET_LEN + i, i, counter, data[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int counters_show(struct seq_file *s, void *not_used)
|
|
{
|
|
struct tb_port *port = s->private;
|
|
struct tb_switch *sw = port->sw;
|
|
struct tb *tb = sw->tb;
|
|
int i, ret = 0;
|
|
|
|
pm_runtime_get_sync(&sw->dev);
|
|
|
|
if (mutex_lock_interruptible(&tb->lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out;
|
|
}
|
|
|
|
seq_puts(s, "# offset relative_offset counter_id value\n");
|
|
|
|
for (i = 0; i < port->config.max_counters; i++) {
|
|
ret = counter_set_regs_show(port, s, i);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&tb->lock);
|
|
|
|
out:
|
|
pm_runtime_mark_last_busy(&sw->dev);
|
|
pm_runtime_put_autosuspend(&sw->dev);
|
|
|
|
return ret;
|
|
}
|
|
DEBUGFS_ATTR_RW(counters);
|
|
|
|
/**
|
|
* tb_switch_debugfs_init() - Add debugfs entries for router
|
|
* @sw: Pointer to the router
|
|
*
|
|
* Adds debugfs directories and files for given router.
|
|
*/
|
|
void tb_switch_debugfs_init(struct tb_switch *sw)
|
|
{
|
|
struct dentry *debugfs_dir;
|
|
struct tb_port *port;
|
|
|
|
debugfs_dir = debugfs_create_dir(dev_name(&sw->dev), tb_debugfs_root);
|
|
sw->debugfs_dir = debugfs_dir;
|
|
debugfs_create_file("regs", DEBUGFS_MODE, debugfs_dir, sw,
|
|
&switch_regs_fops);
|
|
|
|
tb_switch_for_each_port(sw, port) {
|
|
struct dentry *debugfs_dir;
|
|
char dir_name[10];
|
|
|
|
if (port->disabled)
|
|
continue;
|
|
if (port->config.type == TB_TYPE_INACTIVE)
|
|
continue;
|
|
|
|
snprintf(dir_name, sizeof(dir_name), "port%d", port->port);
|
|
debugfs_dir = debugfs_create_dir(dir_name, sw->debugfs_dir);
|
|
debugfs_create_file("regs", DEBUGFS_MODE, debugfs_dir,
|
|
port, &port_regs_fops);
|
|
debugfs_create_file("path", 0400, debugfs_dir, port,
|
|
&path_fops);
|
|
if (port->config.counters_support)
|
|
debugfs_create_file("counters", 0600, debugfs_dir, port,
|
|
&counters_fops);
|
|
}
|
|
|
|
margining_switch_init(sw);
|
|
}
|
|
|
|
/**
|
|
* tb_switch_debugfs_remove() - Remove all router debugfs entries
|
|
* @sw: Pointer to the router
|
|
*
|
|
* Removes all previously added debugfs entries under this router.
|
|
*/
|
|
void tb_switch_debugfs_remove(struct tb_switch *sw)
|
|
{
|
|
margining_switch_remove(sw);
|
|
debugfs_remove_recursive(sw->debugfs_dir);
|
|
}
|
|
|
|
void tb_xdomain_debugfs_init(struct tb_xdomain *xd)
|
|
{
|
|
margining_xdomain_init(xd);
|
|
}
|
|
|
|
void tb_xdomain_debugfs_remove(struct tb_xdomain *xd)
|
|
{
|
|
margining_xdomain_remove(xd);
|
|
}
|
|
|
|
/**
|
|
* tb_service_debugfs_init() - Add debugfs directory for service
|
|
* @svc: Thunderbolt service pointer
|
|
*
|
|
* Adds debugfs directory for service.
|
|
*/
|
|
void tb_service_debugfs_init(struct tb_service *svc)
|
|
{
|
|
svc->debugfs_dir = debugfs_create_dir(dev_name(&svc->dev),
|
|
tb_debugfs_root);
|
|
}
|
|
|
|
/**
|
|
* tb_service_debugfs_remove() - Remove service debugfs directory
|
|
* @svc: Thunderbolt service pointer
|
|
*
|
|
* Removes the previously created debugfs directory for @svc.
|
|
*/
|
|
void tb_service_debugfs_remove(struct tb_service *svc)
|
|
{
|
|
debugfs_remove_recursive(svc->debugfs_dir);
|
|
svc->debugfs_dir = NULL;
|
|
}
|
|
|
|
void tb_debugfs_init(void)
|
|
{
|
|
tb_debugfs_root = debugfs_create_dir("thunderbolt", NULL);
|
|
}
|
|
|
|
void tb_debugfs_exit(void)
|
|
{
|
|
debugfs_remove_recursive(tb_debugfs_root);
|
|
}
|