diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/debugfs.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/debugfs.c | 332 |
1 files changed, 289 insertions, 43 deletions
diff --git a/drivers/staging/rdma/hfi1/debugfs.c b/drivers/staging/rdma/hfi1/debugfs.c index acd2269e9f14..dbab9d9cc288 100644 --- a/drivers/staging/rdma/hfi1/debugfs.c +++ b/drivers/staging/rdma/hfi1/debugfs.c @@ -1,13 +1,12 @@ #ifdef CONFIG_DEBUG_FS /* + * Copyright(c) 2015, 2016 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * - * Copyright(c) 2015 Intel Corporation. - * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. @@ -19,8 +18,6 @@ * * BSD LICENSE * - * Copyright(c) 2015 Intel Corporation. - * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -52,6 +49,7 @@ #include <linux/seq_file.h> #include <linux/kernel.h> #include <linux/export.h> +#include <linux/module.h> #include "hfi.h" #include "debugfs.h" @@ -71,6 +69,7 @@ static const struct seq_operations _##name##_seq_ops = { \ .stop = _##name##_seq_stop, \ .show = _##name##_seq_show \ } + #define DEBUGFS_SEQ_FILE_OPEN(name) \ static int _##name##_open(struct inode *inode, struct file *s) \ { \ @@ -102,7 +101,6 @@ do { \ pr_warn("create of %s failed\n", name); \ } while (0) - #define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \ DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO) @@ -127,7 +125,6 @@ static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) return pos; } - static void _opcode_stats_seq_stop(struct seq_file *s, void *v) __releases(RCU) { @@ -151,8 +148,8 @@ static int _opcode_stats_seq_show(struct seq_file *s, void *v) if (!n_packets && !n_bytes) return SEQ_SKIP; seq_printf(s, "%02llx %llu/%llu\n", i, - (unsigned long long) n_packets, - (unsigned long long) n_bytes); + (unsigned long long)n_packets, + (unsigned long long)n_bytes); return 0; } @@ -247,7 +244,7 @@ __acquires(RCU) } static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr, - loff_t *pos) + loff_t *pos) { struct qp_iter *iter = iter_ptr; @@ -308,7 +305,6 @@ static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos) return pos; } - static void _sdes_seq_stop(struct seq_file *s, void *v) __releases(RCU) { @@ -341,7 +337,7 @@ static ssize_t dev_counters_read(struct file *file, char __user *buf, rcu_read_lock(); dd = private2dd(file); - avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters); + avail = hfi1_read_cntrs(dd, NULL, &counters); rval = simple_read_from_buffer(buf, count, ppos, counters, avail); rcu_read_unlock(); return rval; @@ -358,7 +354,7 @@ static ssize_t dev_names_read(struct file *file, char __user *buf, rcu_read_lock(); dd = private2dd(file); - avail = hfi1_read_cntrs(dd, *ppos, &names, NULL); + avail = hfi1_read_cntrs(dd, &names, NULL); rval = simple_read_from_buffer(buf, count, ppos, names, avail); rcu_read_unlock(); return rval; @@ -385,8 +381,7 @@ static ssize_t portnames_read(struct file *file, char __user *buf, rcu_read_lock(); dd = private2dd(file); - /* port number n/a here since names are constant */ - avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL); + avail = hfi1_read_portcntrs(dd->pport, &names, NULL); rval = simple_read_from_buffer(buf, count, ppos, names, avail); rcu_read_unlock(); return rval; @@ -394,28 +389,150 @@ static ssize_t portnames_read(struct file *file, char __user *buf, /* read the per-port counters */ static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { u64 *counters; size_t avail; - struct hfi1_devdata *dd; struct hfi1_pportdata *ppd; ssize_t rval; rcu_read_lock(); ppd = private2ppd(file); - dd = ppd->dd; - avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters); + avail = hfi1_read_portcntrs(ppd, NULL, &counters); rval = simple_read_from_buffer(buf, count, ppos, counters, avail); rcu_read_unlock(); return rval; } +static void check_dyn_flag(u64 scratch0, char *p, int size, int *used, + int this_hfi, int hfi, u32 flag, const char *what) +{ + u32 mask; + + mask = flag << (hfi ? CR_DYN_SHIFT : 0); + if (scratch0 & mask) { + *used += scnprintf(p + *used, size - *used, + " 0x%08x - HFI%d %s in use, %s device\n", + mask, hfi, what, + this_hfi == hfi ? "this" : "other"); + } +} + +static ssize_t asic_flags_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct hfi1_pportdata *ppd; + struct hfi1_devdata *dd; + u64 scratch0; + char *tmp; + int ret = 0; + int size; + int used; + int i; + + rcu_read_lock(); + ppd = private2ppd(file); + dd = ppd->dd; + size = PAGE_SIZE; + used = 0; + tmp = kmalloc(size, GFP_KERNEL); + if (!tmp) { + rcu_read_unlock(); + return -ENOMEM; + } + + scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); + used += scnprintf(tmp + used, size - used, + "Resource flags: 0x%016llx\n", scratch0); + + /* check permanent flag */ + if (scratch0 & CR_THERM_INIT) { + used += scnprintf(tmp + used, size - used, + " 0x%08x - thermal monitoring initialized\n", + (u32)CR_THERM_INIT); + } + + /* check each dynamic flag on each HFI */ + for (i = 0; i < 2; i++) { + check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, + CR_SBUS, "SBus"); + check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, + CR_EPROM, "EPROM"); + check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, + CR_I2C1, "i2c chain 1"); + check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i, + CR_I2C2, "i2c chain 2"); + } + used += scnprintf(tmp + used, size - used, "Write bits to clear\n"); + + ret = simple_read_from_buffer(buf, count, ppos, tmp, used); + rcu_read_unlock(); + kfree(tmp); + return ret; +} + +static ssize_t asic_flags_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct hfi1_pportdata *ppd; + struct hfi1_devdata *dd; + char *buff; + int ret; + unsigned long long value; + u64 scratch0; + u64 clear; + + rcu_read_lock(); + ppd = private2ppd(file); + dd = ppd->dd; + + buff = kmalloc(count + 1, GFP_KERNEL); + if (!buff) { + ret = -ENOMEM; + goto do_return; + } + + ret = copy_from_user(buff, buf, count); + if (ret > 0) { + ret = -EFAULT; + goto do_free; + } + + /* zero terminate and read the expected integer */ + buff[count] = 0; + ret = kstrtoull(buff, 0, &value); + if (ret) + goto do_free; + clear = value; + + /* obtain exclusive access */ + mutex_lock(&dd->asic_data->asic_resource_mutex); + acquire_hw_mutex(dd); + + scratch0 = read_csr(dd, ASIC_CFG_SCRATCH); + scratch0 &= ~clear; + write_csr(dd, ASIC_CFG_SCRATCH, scratch0); + /* force write to be visible to other HFI on another OS */ + (void)read_csr(dd, ASIC_CFG_SCRATCH); + + release_hw_mutex(dd); + mutex_unlock(&dd->asic_data->asic_resource_mutex); + + /* return the number of bytes written */ + ret = count; + + do_free: + kfree(buff); + do_return: + rcu_read_unlock(); + return ret; +} + /* * read the per-port QSFP data for ppd */ static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { struct hfi1_pportdata *ppd; char *tmp; @@ -439,7 +556,7 @@ static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf, /* Do an i2c write operation on the chain for the given HFI. */ static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos, u32 target) + size_t count, loff_t *ppos, u32 target) { struct hfi1_pportdata *ppd; char *buff; @@ -451,6 +568,16 @@ static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, rcu_read_lock(); ppd = private2ppd(file); + /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ + i2c_addr = (*ppos >> 16) & 0xffff; + offset = *ppos & 0xffff; + + /* explicitly reject invalid address 0 to catch cp and cat */ + if (i2c_addr == 0) { + ret = -EINVAL; + goto _return; + } + buff = kmalloc(count, GFP_KERNEL); if (!buff) { ret = -ENOMEM; @@ -463,9 +590,6 @@ static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, goto _free; } - i2c_addr = (*ppos >> 16) & 0xff; - offset = *ppos & 0xffff; - total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count); if (total_written < 0) { ret = total_written; @@ -485,21 +609,21 @@ static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf, /* Do an i2c write operation on chain for HFI 0. */ static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __i2c_debugfs_write(file, buf, count, ppos, 0); } /* Do an i2c write operation on chain for HFI 1. */ static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __i2c_debugfs_write(file, buf, count, ppos, 1); } /* Do an i2c read operation on the chain for the given HFI. */ static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos, u32 target) + size_t count, loff_t *ppos, u32 target) { struct hfi1_pportdata *ppd; char *buff; @@ -511,15 +635,22 @@ static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, rcu_read_lock(); ppd = private2ppd(file); + /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */ + i2c_addr = (*ppos >> 16) & 0xffff; + offset = *ppos & 0xffff; + + /* explicitly reject invalid address 0 to catch cp and cat */ + if (i2c_addr == 0) { + ret = -EINVAL; + goto _return; + } + buff = kmalloc(count, GFP_KERNEL); if (!buff) { ret = -ENOMEM; goto _return; } - i2c_addr = (*ppos >> 16) & 0xff; - offset = *ppos & 0xffff; - total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count); if (total_read < 0) { ret = total_read; @@ -545,21 +676,21 @@ static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf, /* Do an i2c read operation on chain for HFI 0. */ static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __i2c_debugfs_read(file, buf, count, ppos, 0); } /* Do an i2c read operation on chain for HFI 1. */ static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __i2c_debugfs_read(file, buf, count, ppos, 1); } /* Do a QSFP write operation on the i2c chain for the given HFI. */ static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos, u32 target) + size_t count, loff_t *ppos, u32 target) { struct hfi1_pportdata *ppd; char *buff; @@ -605,21 +736,21 @@ static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf, /* Do a QSFP write operation on i2c chain for HFI 0. */ static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __qsfp_debugfs_write(file, buf, count, ppos, 0); } /* Do a QSFP write operation on i2c chain for HFI 1. */ static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __qsfp_debugfs_write(file, buf, count, ppos, 1); } /* Do a QSFP read operation on the i2c chain for the given HFI. */ static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos, u32 target) + size_t count, loff_t *ppos, u32 target) { struct hfi1_pportdata *ppd; char *buff; @@ -665,18 +796,116 @@ static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf, /* Do a QSFP read operation on i2c chain for HFI 0. */ static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __qsfp_debugfs_read(file, buf, count, ppos, 0); } /* Do a QSFP read operation on i2c chain for HFI 1. */ static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) + size_t count, loff_t *ppos) { return __qsfp_debugfs_read(file, buf, count, ppos, 1); } +static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target) +{ + struct hfi1_pportdata *ppd; + int ret; + + if (!try_module_get(THIS_MODULE)) + return -ENODEV; + + ppd = private2ppd(fp); + + ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); + if (ret) /* failed - release the module */ + module_put(THIS_MODULE); + + return ret; +} + +static int i2c1_debugfs_open(struct inode *in, struct file *fp) +{ + return __i2c_debugfs_open(in, fp, 0); +} + +static int i2c2_debugfs_open(struct inode *in, struct file *fp) +{ + return __i2c_debugfs_open(in, fp, 1); +} + +static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target) +{ + struct hfi1_pportdata *ppd; + + ppd = private2ppd(fp); + + release_chip_resource(ppd->dd, i2c_target(target)); + module_put(THIS_MODULE); + + return 0; +} + +static int i2c1_debugfs_release(struct inode *in, struct file *fp) +{ + return __i2c_debugfs_release(in, fp, 0); +} + +static int i2c2_debugfs_release(struct inode *in, struct file *fp) +{ + return __i2c_debugfs_release(in, fp, 1); +} + +static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target) +{ + struct hfi1_pportdata *ppd; + int ret; + + if (!try_module_get(THIS_MODULE)) + return -ENODEV; + + ppd = private2ppd(fp); + + ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0); + if (ret) /* failed - release the module */ + module_put(THIS_MODULE); + + return ret; +} + +static int qsfp1_debugfs_open(struct inode *in, struct file *fp) +{ + return __qsfp_debugfs_open(in, fp, 0); +} + +static int qsfp2_debugfs_open(struct inode *in, struct file *fp) +{ + return __qsfp_debugfs_open(in, fp, 1); +} + +static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target) +{ + struct hfi1_pportdata *ppd; + + ppd = private2ppd(fp); + + release_chip_resource(ppd->dd, i2c_target(target)); + module_put(THIS_MODULE); + + return 0; +} + +static int qsfp1_debugfs_release(struct inode *in, struct file *fp) +{ + return __qsfp_debugfs_release(in, fp, 0); +} + +static int qsfp2_debugfs_release(struct inode *in, struct file *fp) +{ + return __qsfp_debugfs_release(in, fp, 1); +} + #define DEBUGFS_OPS(nm, readroutine, writeroutine) \ { \ .name = nm, \ @@ -687,6 +916,18 @@ static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf, }, \ } +#define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \ +{ \ + .name = nm, \ + .ops = { \ + .read = readf, \ + .write = writef, \ + .llseek = generic_file_llseek, \ + .open = openf, \ + .release = releasef \ + }, \ +} + static const struct counter_info cntr_ops[] = { DEBUGFS_OPS("counter_names", dev_names_read, NULL), DEBUGFS_OPS("counters", dev_counters_read, NULL), @@ -695,11 +936,16 @@ static const struct counter_info cntr_ops[] = { static const struct counter_info port_cntr_ops[] = { DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL), - DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write), - DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write), + DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write, + i2c1_debugfs_open, i2c1_debugfs_release), + DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write, + i2c2_debugfs_open, i2c2_debugfs_release), DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL), - DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write), - DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write), + DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write, + qsfp1_debugfs_open, qsfp1_debugfs_release), + DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write, + qsfp2_debugfs_open, qsfp2_debugfs_release), + DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write), }; void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) @@ -747,8 +993,8 @@ void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) ibd->hfi1_ibdev_dbg, ppd, &port_cntr_ops[i].ops, - port_cntr_ops[i].ops.write == NULL ? - S_IRUGO : S_IRUGO|S_IWUSR); + !port_cntr_ops[i].ops.write ? + S_IRUGO : S_IRUGO | S_IWUSR); } } |