From af3674d62d3470c4573709c031e6b17f1f39c96b Mon Sep 17 00:00:00 2001 From: Tadeusz Struk Date: Sun, 25 Sep 2016 07:44:44 -0700 Subject: [PATCH] IB/hfi1: Add new debugfs sdma_cpu_list file Add a debugfs sdma_cpu_list file that can be used to examine the CPU to sdma engine assignments for the whole device. Reviewed-by: Dennis Dalessandro Reviewed-by: Sebastian Sanchez Reviewed-by: Jianxin Xiong Signed-off-by: Tadeusz Struk Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hfi1/debugfs.c | 38 ++++++++++++++++++++++++ drivers/infiniband/hw/hfi1/sdma.c | 43 ++++++++++++++++++++++++++++ drivers/infiniband/hw/hfi1/sdma.h | 2 ++ 3 files changed, 83 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c index 5e9be16f6cd3..632ba21759ab 100644 --- a/drivers/infiniband/hw/hfi1/debugfs.c +++ b/drivers/infiniband/hw/hfi1/debugfs.c @@ -933,6 +933,43 @@ static const struct counter_info port_cntr_ops[] = { DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_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]; @@ -961,6 +998,7 @@ void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd) DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd); DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd); DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd); + DEBUGFS_SEQ_FILE_CREATE(sdma_cpu_list, ibd->hfi1_ibdev_dbg, ibd); /* dev counter files */ for (i = 0; i < ARRAY_SIZE(cntr_ops); i++) DEBUGFS_FILE_CREATE(cntr_ops[i].name, diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c index 8cfa960a1a4a..fd39bcaa062d 100644 --- a/drivers/infiniband/hw/hfi1/sdma.c +++ b/drivers/infiniband/hw/hfi1/sdma.c @@ -1093,6 +1093,49 @@ static void sdma_rht_free(void *ptr, void *arg) kfree(rht_node); } +/** + * sdma_seqfile_dump_cpu_list() - debugfs dump the cpu to sdma mappings + * @s: seq file + * @dd: hfi1_devdata + * @cpuid: cpu id + * + * This routine dumps the process to sde mappings per cpu + */ +void sdma_seqfile_dump_cpu_list(struct seq_file *s, + struct hfi1_devdata *dd, + unsigned long cpuid) +{ + struct sdma_rht_node *rht_node; + int i, j; + + rht_node = rhashtable_lookup_fast(&dd->sdma_rht, &cpuid, + sdma_rht_params); + if (!rht_node) + return; + + seq_printf(s, "cpu%3lu: ", cpuid); + for (i = 0; i < HFI1_MAX_VLS_SUPPORTED; i++) { + if (!rht_node->map[i] || !rht_node->map[i]->ctr) + continue; + + seq_printf(s, " vl%d: [", i); + + for (j = 0; j < rht_node->map[i]->ctr; j++) { + if (!rht_node->map[i]->sde[j]) + continue; + + if (j > 0) + seq_puts(s, ","); + + seq_printf(s, " sdma%2d", + rht_node->map[i]->sde[j]->this_idx); + } + seq_puts(s, " ]"); + } + + seq_puts(s, "\n"); +} + /* * Free the indicated map struct */ diff --git a/drivers/infiniband/hw/hfi1/sdma.h b/drivers/infiniband/hw/hfi1/sdma.h index 93025f6ded15..56257ea3598f 100644 --- a/drivers/infiniband/hw/hfi1/sdma.h +++ b/drivers/infiniband/hw/hfi1/sdma.h @@ -1068,6 +1068,8 @@ ssize_t sdma_set_cpu_to_sde_map(struct sdma_engine *sde, const char *buf, size_t count); int sdma_engine_get_vl(struct sdma_engine *sde); void sdma_seqfile_dump_sde(struct seq_file *s, struct sdma_engine *); +void sdma_seqfile_dump_cpu_list(struct seq_file *s, struct hfi1_devdata *dd, + unsigned long cpuid); #ifdef CONFIG_SDMA_VERBOSITY void sdma_dumpstate(struct sdma_engine *); -- 2.20.1