diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/debugfs.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/debugfs.c | 1363 |
1 files changed, 1363 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c new file mode 100644 index 0000000000..80ba1e53c0 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/debugfs.c @@ -0,0 +1,1363 @@ +// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause +/* + * Copyright(c) 2015-2018 Intel Corporation. + */ + +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ratelimit.h> +#include <linux/fault-inject.h> + +#include "hfi.h" +#include "trace.h" +#include "debugfs.h" +#include "device.h" +#include "qp.h" +#include "sdma.h" +#include "fault.h" + +static struct dentry *hfi1_dbg_root; + +/* wrappers to enforce srcu in seq file */ +ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size, + loff_t *ppos) +{ + struct dentry *d = file->f_path.dentry; + ssize_t r; + + r = debugfs_file_get(d); + if (unlikely(r)) + return r; + r = seq_read(file, buf, size, ppos); + debugfs_file_put(d); + return r; +} + +loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence) +{ + struct dentry *d = file->f_path.dentry; + loff_t r; + + r = debugfs_file_get(d); + if (unlikely(r)) + return r; + r = seq_lseek(file, offset, whence); + debugfs_file_put(d); + return r; +} + +#define private2dd(file) (file_inode(file)->i_private) +#define private2ppd(file) (file_inode(file)->i_private) + +static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos) +{ + struct hfi1_opcode_stats_perctx *opstats; + + if (*pos >= ARRAY_SIZE(opstats->stats)) + return NULL; + return pos; +} + +static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct hfi1_opcode_stats_perctx *opstats; + + ++*pos; + if (*pos >= ARRAY_SIZE(opstats->stats)) + return NULL; + return pos; +} + +static void _opcode_stats_seq_stop(struct seq_file *s, void *v) +{ +} + +static int opcode_stats_show(struct seq_file *s, u8 i, u64 packets, u64 bytes) +{ + if (!packets && !bytes) + return SEQ_SKIP; + seq_printf(s, "%02x %llu/%llu\n", i, + (unsigned long long)packets, + (unsigned long long)bytes); + + return 0; +} + +static int _opcode_stats_seq_show(struct seq_file *s, void *v) +{ + loff_t *spos = v; + loff_t i = *spos, j; + u64 n_packets = 0, n_bytes = 0; + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + struct hfi1_ctxtdata *rcd; + + for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) { + rcd = hfi1_rcd_get_by_index(dd, j); + if (rcd) { + n_packets += rcd->opstats->stats[i].n_packets; + n_bytes += rcd->opstats->stats[i].n_bytes; + } + hfi1_rcd_put(rcd); + } + return opcode_stats_show(s, i, n_packets, n_bytes); +} + +DEBUGFS_SEQ_FILE_OPS(opcode_stats); +DEBUGFS_SEQ_FILE_OPEN(opcode_stats) +DEBUGFS_FILE_OPS(opcode_stats); + +static void *_tx_opcode_stats_seq_start(struct seq_file *s, loff_t *pos) +{ + return _opcode_stats_seq_start(s, pos); +} + +static void *_tx_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + return _opcode_stats_seq_next(s, v, pos); +} + +static void _tx_opcode_stats_seq_stop(struct seq_file *s, void *v) +{ +} + +static int _tx_opcode_stats_seq_show(struct seq_file *s, void *v) +{ + loff_t *spos = v; + loff_t i = *spos; + int j; + u64 n_packets = 0, n_bytes = 0; + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + for_each_possible_cpu(j) { + struct hfi1_opcode_stats_perctx *s = + per_cpu_ptr(dd->tx_opstats, j); + n_packets += s->stats[i].n_packets; + n_bytes += s->stats[i].n_bytes; + } + return opcode_stats_show(s, i, n_packets, n_bytes); +} + +DEBUGFS_SEQ_FILE_OPS(tx_opcode_stats); +DEBUGFS_SEQ_FILE_OPEN(tx_opcode_stats) +DEBUGFS_FILE_OPS(tx_opcode_stats); + +static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + if (!*pos) + return SEQ_START_TOKEN; + if (*pos >= dd->first_dyn_alloc_ctxt) + return NULL; + return pos; +} + +static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + if (v == SEQ_START_TOKEN) + return pos; + + ++*pos; + if (*pos >= dd->first_dyn_alloc_ctxt) + return NULL; + return pos; +} + +static void _ctx_stats_seq_stop(struct seq_file *s, void *v) +{ + /* nothing allocated */ +} + +static int _ctx_stats_seq_show(struct seq_file *s, void *v) +{ + loff_t *spos; + loff_t i, j; + u64 n_packets = 0; + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + struct hfi1_ctxtdata *rcd; + + if (v == SEQ_START_TOKEN) { + seq_puts(s, "Ctx:npkts\n"); + return 0; + } + + spos = v; + i = *spos; + + rcd = hfi1_rcd_get_by_index_safe(dd, i); + if (!rcd) + return SEQ_SKIP; + + for (j = 0; j < ARRAY_SIZE(rcd->opstats->stats); j++) + n_packets += rcd->opstats->stats[j].n_packets; + + hfi1_rcd_put(rcd); + + if (!n_packets) + return SEQ_SKIP; + + seq_printf(s, " %llu:%llu\n", i, n_packets); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(ctx_stats); +DEBUGFS_SEQ_FILE_OPEN(ctx_stats) +DEBUGFS_FILE_OPS(ctx_stats); + +static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos) + __acquires(RCU) +{ + struct rvt_qp_iter *iter; + loff_t n = *pos; + + iter = rvt_qp_iter_init(s->private, 0, NULL); + + /* stop calls rcu_read_unlock */ + rcu_read_lock(); + + if (!iter) + return NULL; + + do { + if (rvt_qp_iter_next(iter)) { + kfree(iter); + return NULL; + } + } while (n--); + + return iter; +} + +static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr, + loff_t *pos) + __must_hold(RCU) +{ + struct rvt_qp_iter *iter = iter_ptr; + + (*pos)++; + + if (rvt_qp_iter_next(iter)) { + kfree(iter); + return NULL; + } + + return iter; +} + +static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr) + __releases(RCU) +{ + rcu_read_unlock(); +} + +static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr) +{ + struct rvt_qp_iter *iter = iter_ptr; + + if (!iter) + return 0; + + qp_iter_print(s, iter); + + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(qp_stats); +DEBUGFS_SEQ_FILE_OPEN(qp_stats) +DEBUGFS_FILE_OPS(qp_stats); + +static void *_sdes_seq_start(struct seq_file *s, loff_t *pos) +{ + struct hfi1_ibdev *ibd; + struct hfi1_devdata *dd; + + ibd = (struct hfi1_ibdev *)s->private; + dd = dd_from_dev(ibd); + if (!dd->per_sdma || *pos >= dd->num_sdma) + return NULL; + return pos; +} + +static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + ++*pos; + if (!dd->per_sdma || *pos >= dd->num_sdma) + return NULL; + return pos; +} + +static void _sdes_seq_stop(struct seq_file *s, void *v) +{ +} + +static int _sdes_seq_show(struct seq_file *s, void *v) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + loff_t *spos = v; + loff_t i = *spos; + + sdma_seqfile_dump_sde(s, &dd->per_sdma[i]); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(sdes); +DEBUGFS_SEQ_FILE_OPEN(sdes) +DEBUGFS_FILE_OPS(sdes); + +static void *_rcds_seq_start(struct seq_file *s, loff_t *pos) +{ + struct hfi1_ibdev *ibd; + struct hfi1_devdata *dd; + + ibd = (struct hfi1_ibdev *)s->private; + dd = dd_from_dev(ibd); + if (!dd->rcd || *pos >= dd->n_krcv_queues) + return NULL; + return pos; +} + +static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + ++*pos; + if (!dd->rcd || *pos >= dd->num_rcv_contexts) + return NULL; + return pos; +} + +static void _rcds_seq_stop(struct seq_file *s, void *v) +{ +} + +static int _rcds_seq_show(struct seq_file *s, void *v) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + struct hfi1_ctxtdata *rcd; + loff_t *spos = v; + loff_t i = *spos; + + rcd = hfi1_rcd_get_by_index_safe(dd, i); + if (rcd) + seqfile_dump_rcd(s, rcd); + hfi1_rcd_put(rcd); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(rcds); +DEBUGFS_SEQ_FILE_OPEN(rcds) +DEBUGFS_FILE_OPS(rcds); + +static void *_pios_seq_start(struct seq_file *s, loff_t *pos) +{ + struct hfi1_ibdev *ibd; + struct hfi1_devdata *dd; + + ibd = (struct hfi1_ibdev *)s->private; + dd = dd_from_dev(ibd); + if (!dd->send_contexts || *pos >= dd->num_send_contexts) + return NULL; + return pos; +} + +static void *_pios_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + + ++*pos; + if (!dd->send_contexts || *pos >= dd->num_send_contexts) + return NULL; + return pos; +} + +static void _pios_seq_stop(struct seq_file *s, void *v) +{ +} + +static int _pios_seq_show(struct seq_file *s, void *v) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + struct send_context_info *sci; + loff_t *spos = v; + loff_t i = *spos; + unsigned long flags; + + spin_lock_irqsave(&dd->sc_lock, flags); + sci = &dd->send_contexts[i]; + if (sci && sci->type != SC_USER && sci->allocated && sci->sc) + seqfile_dump_sci(s, i, sci); + spin_unlock_irqrestore(&dd->sc_lock, flags); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(pios); +DEBUGFS_SEQ_FILE_OPEN(pios) +DEBUGFS_FILE_OPS(pios); + +/* read the per-device counters */ +static ssize_t dev_counters_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + u64 *counters; + size_t avail; + struct hfi1_devdata *dd; + ssize_t rval; + + dd = private2dd(file); + avail = hfi1_read_cntrs(dd, NULL, &counters); + rval = simple_read_from_buffer(buf, count, ppos, counters, avail); + return rval; +} + +/* read the per-device counters */ +static ssize_t dev_names_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + char *names; + size_t avail; + struct hfi1_devdata *dd; + ssize_t rval; + + dd = private2dd(file); + avail = hfi1_read_cntrs(dd, &names, NULL); + rval = simple_read_from_buffer(buf, count, ppos, names, avail); + return rval; +} + +struct counter_info { + char *name; + const struct file_operations ops; +}; + +/* + * Could use file_inode(file)->i_ino to figure out which file, + * instead of separate routine for each, but for now, this works... + */ + +/* read the per-port names (same for each port) */ +static ssize_t portnames_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + char *names; + size_t avail; + struct hfi1_devdata *dd; + ssize_t rval; + + dd = private2dd(file); + avail = hfi1_read_portcntrs(dd->pport, &names, NULL); + rval = simple_read_from_buffer(buf, count, ppos, names, avail); + return rval; +} + +/* read the per-port counters */ +static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + u64 *counters; + size_t avail; + struct hfi1_pportdata *ppd; + ssize_t rval; + + ppd = private2ppd(file); + avail = hfi1_read_portcntrs(ppd, NULL, &counters); + rval = simple_read_from_buffer(buf, count, ppos, counters, avail); + 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; + + ppd = private2ppd(file); + dd = ppd->dd; + size = PAGE_SIZE; + used = 0; + tmp = kmalloc(size, GFP_KERNEL); + if (!tmp) + 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); + 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; + + ppd = private2ppd(file); + dd = ppd->dd; + + /* zero terminate and read the expected integer */ + buff = memdup_user_nul(buf, count); + if (IS_ERR(buff)) + return PTR_ERR(buff); + + 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); + return ret; +} + +/* read the dc8051 memory */ +static ssize_t dc8051_memory_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct hfi1_pportdata *ppd = private2ppd(file); + ssize_t rval; + void *tmp; + loff_t start, end; + + /* the checks below expect the position to be positive */ + if (*ppos < 0) + return -EINVAL; + + tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + /* + * Fill in the requested portion of the temporary buffer from the + * 8051 memory. The 8051 memory read is done in terms of 8 bytes. + * Adjust start and end to fit. Skip reading anything if out of + * range. + */ + start = *ppos & ~0x7; /* round down */ + if (start < DC8051_DATA_MEM_SIZE) { + end = (*ppos + count + 7) & ~0x7; /* round up */ + if (end > DC8051_DATA_MEM_SIZE) + end = DC8051_DATA_MEM_SIZE; + rval = read_8051_data(ppd->dd, start, end - start, + (u64 *)(tmp + start)); + if (rval) + goto done; + } + + rval = simple_read_from_buffer(buf, count, ppos, tmp, + DC8051_DATA_MEM_SIZE); +done: + kfree(tmp); + return rval; +} + +static ssize_t debugfs_lcb_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct hfi1_pportdata *ppd = private2ppd(file); + struct hfi1_devdata *dd = ppd->dd; + unsigned long total, csr_off; + u64 data; + + if (*ppos < 0) + return -EINVAL; + /* only read 8 byte quantities */ + if ((count % 8) != 0) + return -EINVAL; + /* offset must be 8-byte aligned */ + if ((*ppos % 8) != 0) + return -EINVAL; + /* do nothing if out of range or zero count */ + if (*ppos >= (LCB_END - LCB_START) || !count) + return 0; + /* reduce count if needed */ + if (*ppos + count > LCB_END - LCB_START) + count = (LCB_END - LCB_START) - *ppos; + + csr_off = LCB_START + *ppos; + for (total = 0; total < count; total += 8, csr_off += 8) { + if (read_lcb_csr(dd, csr_off, (u64 *)&data)) + break; /* failed */ + if (put_user(data, (unsigned long __user *)(buf + total))) + break; + } + *ppos += total; + return total; +} + +static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct hfi1_pportdata *ppd = private2ppd(file); + struct hfi1_devdata *dd = ppd->dd; + unsigned long total, csr_off, data; + + if (*ppos < 0) + return -EINVAL; + /* only write 8 byte quantities */ + if ((count % 8) != 0) + return -EINVAL; + /* offset must be 8-byte aligned */ + if ((*ppos % 8) != 0) + return -EINVAL; + /* do nothing if out of range or zero count */ + if (*ppos >= (LCB_END - LCB_START) || !count) + return 0; + /* reduce count if needed */ + if (*ppos + count > LCB_END - LCB_START) + count = (LCB_END - LCB_START) - *ppos; + + csr_off = LCB_START + *ppos; + for (total = 0; total < count; total += 8, csr_off += 8) { + if (get_user(data, (unsigned long __user *)(buf + total))) + break; + if (write_lcb_csr(dd, csr_off, data)) + break; /* failed */ + } + *ppos += total; + return total; +} + +/* + * 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) +{ + struct hfi1_pportdata *ppd; + char *tmp; + int ret; + + ppd = private2ppd(file); + tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + ret = qsfp_dump(ppd, tmp, PAGE_SIZE); + if (ret > 0) + ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); + kfree(tmp); + return ret; +} + +/* 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) +{ + struct hfi1_pportdata *ppd; + char *buff; + int ret; + int i2c_addr; + int offset; + int total_written; + + 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) + return -EINVAL; + + buff = memdup_user(buf, count); + if (IS_ERR(buff)) + return PTR_ERR(buff); + + total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count); + if (total_written < 0) { + ret = total_written; + goto _free; + } + + *ppos += total_written; + + ret = total_written; + + _free: + kfree(buff); + return ret; +} + +/* 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) +{ + 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) +{ + 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) +{ + struct hfi1_pportdata *ppd; + char *buff; + int ret; + int i2c_addr; + int offset; + int total_read; + + 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) + return -EINVAL; + + buff = kmalloc(count, GFP_KERNEL); + if (!buff) + return -ENOMEM; + + total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count); + if (total_read < 0) { + ret = total_read; + goto _free; + } + + *ppos += total_read; + + ret = copy_to_user(buf, buff, total_read); + if (ret > 0) { + ret = -EFAULT; + goto _free; + } + + ret = total_read; + + _free: + kfree(buff); + return ret; +} + +/* 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) +{ + 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) +{ + 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) +{ + struct hfi1_pportdata *ppd; + char *buff; + int ret; + int total_written; + + if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */ + return -EINVAL; + + ppd = private2ppd(file); + + buff = memdup_user(buf, count); + if (IS_ERR(buff)) + return PTR_ERR(buff); + + total_written = qsfp_write(ppd, target, *ppos, buff, count); + if (total_written < 0) { + ret = total_written; + goto _free; + } + + *ppos += total_written; + + ret = total_written; + + _free: + kfree(buff); + return ret; +} + +/* 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) +{ + 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) +{ + 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) +{ + struct hfi1_pportdata *ppd; + char *buff; + int ret; + int total_read; + + if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */ + ret = -EINVAL; + goto _return; + } + + ppd = private2ppd(file); + + buff = kmalloc(count, GFP_KERNEL); + if (!buff) { + ret = -ENOMEM; + goto _return; + } + + total_read = qsfp_read(ppd, target, *ppos, buff, count); + if (total_read < 0) { + ret = total_read; + goto _free; + } + + *ppos += total_read; + + ret = copy_to_user(buf, buff, total_read); + if (ret > 0) { + ret = -EFAULT; + goto _free; + } + + ret = total_read; + + _free: + kfree(buff); + _return: + return ret; +} + +/* 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) +{ + 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) +{ + 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; + + ppd = private2ppd(fp); + + return acquire_chip_resource(ppd->dd, i2c_target(target), 0); +} + +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)); + + 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; + + ppd = private2ppd(fp); + + return acquire_chip_resource(ppd->dd, i2c_target(target), 0); +} + +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)); + + 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 EXPROM_WRITE_ENABLE BIT_ULL(14) + +static bool exprom_wp_disabled; + +static int exprom_wp_set(struct hfi1_devdata *dd, bool disable) +{ + u64 gpio_val = 0; + + if (disable) { + gpio_val = EXPROM_WRITE_ENABLE; + exprom_wp_disabled = true; + dd_dev_info(dd, "Disable Expansion ROM Write Protection\n"); + } else { + exprom_wp_disabled = false; + dd_dev_info(dd, "Enable Expansion ROM Write Protection\n"); + } + + write_csr(dd, ASIC_GPIO_OUT, gpio_val); + write_csr(dd, ASIC_GPIO_OE, gpio_val); + + return 0; +} + +static ssize_t exprom_wp_debugfs_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + return 0; +} + +static ssize_t exprom_wp_debugfs_write(struct file *file, + const char __user *buf, size_t count, + loff_t *ppos) +{ + struct hfi1_pportdata *ppd = private2ppd(file); + char cdata; + + if (count != 1) + return -EINVAL; + if (get_user(cdata, buf)) + return -EFAULT; + if (cdata == '0') + exprom_wp_set(ppd->dd, false); + else if (cdata == '1') + exprom_wp_set(ppd->dd, true); + else + return -EINVAL; + + return 1; +} + +static unsigned long exprom_in_use; + +static int exprom_wp_debugfs_open(struct inode *in, struct file *fp) +{ + if (test_and_set_bit(0, &exprom_in_use)) + return -EBUSY; + + return 0; +} + +static int exprom_wp_debugfs_release(struct inode *in, struct file *fp) +{ + struct hfi1_pportdata *ppd = private2ppd(fp); + + if (exprom_wp_disabled) + exprom_wp_set(ppd->dd, false); + clear_bit(0, &exprom_in_use); + + return 0; +} + +#define DEBUGFS_OPS(nm, readroutine, writeroutine) \ +{ \ + .name = nm, \ + .ops = { \ + .owner = THIS_MODULE, \ + .read = readroutine, \ + .write = writeroutine, \ + .llseek = generic_file_llseek, \ + }, \ +} + +#define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \ +{ \ + .name = nm, \ + .ops = { \ + .owner = THIS_MODULE, \ + .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), + DEBUGFS_OPS("portcounter_names", portnames_read, NULL), +}; + +static const struct counter_info port_cntr_ops[] = { + DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL), + 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_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_XOPS("exprom_wp", exprom_wp_debugfs_read, + exprom_wp_debugfs_write, exprom_wp_debugfs_open, + exprom_wp_debugfs_release), + DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write), + DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL), + DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write), +}; + +static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos) +{ + if (*pos >= num_online_cpus()) + return NULL; + + return pos; +} + +static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + ++*pos; + if (*pos >= num_online_cpus()) + return NULL; + + return pos; +} + +static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v) +{ + /* nothing allocated */ +} + +static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v) +{ + struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private; + struct hfi1_devdata *dd = dd_from_dev(ibd); + loff_t *spos = v; + loff_t i = *spos; + + sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list); +DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list) +DEBUGFS_FILE_OPS(sdma_cpu_list); + +void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) +{ + char name[sizeof("port0counters") + 1]; + char link[10]; + struct hfi1_devdata *dd = dd_from_dev(ibd); + struct hfi1_pportdata *ppd; + struct dentry *root; + int unit = dd->unit; + int i, j; + + if (!hfi1_dbg_root) + return; + snprintf(name, sizeof(name), "%s_%d", class_name(), unit); + snprintf(link, sizeof(link), "%d", unit); + root = debugfs_create_dir(name, hfi1_dbg_root); + ibd->hfi1_ibdev_dbg = root; + + ibd->hfi1_ibdev_link = + debugfs_create_symlink(link, hfi1_dbg_root, name); + + debugfs_create_file("opcode_stats", 0444, root, ibd, + &_opcode_stats_file_ops); + debugfs_create_file("tx_opcode_stats", 0444, root, ibd, + &_tx_opcode_stats_file_ops); + debugfs_create_file("ctx_stats", 0444, root, ibd, &_ctx_stats_file_ops); + debugfs_create_file("qp_stats", 0444, root, ibd, &_qp_stats_file_ops); + debugfs_create_file("sdes", 0444, root, ibd, &_sdes_file_ops); + debugfs_create_file("rcds", 0444, root, ibd, &_rcds_file_ops); + debugfs_create_file("pios", 0444, root, ibd, &_pios_file_ops); + debugfs_create_file("sdma_cpu_list", 0444, root, ibd, + &_sdma_cpu_list_file_ops); + + /* dev counter files */ + for (i = 0; i < ARRAY_SIZE(cntr_ops); i++) + debugfs_create_file(cntr_ops[i].name, 0444, root, dd, + &cntr_ops[i].ops); + + /* per port files */ + for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++) + for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) { + snprintf(name, + sizeof(name), + port_cntr_ops[i].name, + j + 1); + debugfs_create_file(name, + !port_cntr_ops[i].ops.write ? + S_IRUGO : + S_IRUGO | S_IWUSR, + root, ppd, &port_cntr_ops[i].ops); + } + + hfi1_fault_init_debugfs(ibd); +} + +void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd) +{ + if (!hfi1_dbg_root) + goto out; + hfi1_fault_exit_debugfs(ibd); + debugfs_remove(ibd->hfi1_ibdev_link); + debugfs_remove_recursive(ibd->hfi1_ibdev_dbg); +out: + ibd->hfi1_ibdev_dbg = NULL; +} + +/* + * driver stats field names, one line per stat, single string. Used by + * programs like hfistats to print the stats in a way which works for + * different versions of drivers, without changing program source. + * if hfi1_ib_stats changes, this needs to change. Names need to be + * 12 chars or less (w/o newline), for proper display by hfistats utility. + */ +static const char * const hfi1_statnames[] = { + /* must be element 0*/ + "KernIntr", + "ErrorIntr", + "Tx_Errs", + "Rcv_Errs", + "H/W_Errs", + "NoPIOBufs", + "CtxtsOpen", + "RcvLen_Errs", + "EgrBufFull", + "EgrHdrFull" +}; + +static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos) +{ + if (*pos >= ARRAY_SIZE(hfi1_statnames)) + return NULL; + return pos; +} + +static void *_driver_stats_names_seq_next( + struct seq_file *s, + void *v, + loff_t *pos) +{ + ++*pos; + if (*pos >= ARRAY_SIZE(hfi1_statnames)) + return NULL; + return pos; +} + +static void _driver_stats_names_seq_stop(struct seq_file *s, void *v) +{ +} + +static int _driver_stats_names_seq_show(struct seq_file *s, void *v) +{ + loff_t *spos = v; + + seq_printf(s, "%s\n", hfi1_statnames[*spos]); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(driver_stats_names); +DEBUGFS_SEQ_FILE_OPEN(driver_stats_names) +DEBUGFS_FILE_OPS(driver_stats_names); + +static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos) +{ + if (*pos >= ARRAY_SIZE(hfi1_statnames)) + return NULL; + return pos; +} + +static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + ++*pos; + if (*pos >= ARRAY_SIZE(hfi1_statnames)) + return NULL; + return pos; +} + +static void _driver_stats_seq_stop(struct seq_file *s, void *v) +{ +} + +static void hfi1_sps_show_ints(struct seq_file *s) +{ + unsigned long index, flags; + struct hfi1_devdata *dd; + u64 sps_ints = 0; + + xa_lock_irqsave(&hfi1_dev_table, flags); + xa_for_each(&hfi1_dev_table, index, dd) { + sps_ints += get_all_cpu_total(dd->int_counter); + } + xa_unlock_irqrestore(&hfi1_dev_table, flags); + seq_write(s, &sps_ints, sizeof(u64)); +} + +static int _driver_stats_seq_show(struct seq_file *s, void *v) +{ + loff_t *spos = v; + u64 *stats = (u64 *)&hfi1_stats; + + /* special case for interrupts */ + if (*spos == 0) + hfi1_sps_show_ints(s); + else + seq_write(s, stats + *spos, sizeof(u64)); + return 0; +} + +DEBUGFS_SEQ_FILE_OPS(driver_stats); +DEBUGFS_SEQ_FILE_OPEN(driver_stats) +DEBUGFS_FILE_OPS(driver_stats); + +void hfi1_dbg_init(void) +{ + hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL); + debugfs_create_file("driver_stats_names", 0444, hfi1_dbg_root, NULL, + &_driver_stats_names_file_ops); + debugfs_create_file("driver_stats", 0444, hfi1_dbg_root, NULL, + &_driver_stats_file_ops); +} + +void hfi1_dbg_exit(void) +{ + debugfs_remove_recursive(hfi1_dbg_root); + hfi1_dbg_root = NULL; +} |