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 <dennis.dalessandro@intel.com>
Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Reviewed-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c
index 5e9be16..632ba21 100644 (file)
--- 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 8cfa960..fd39bca 100644 (file)
--- 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 93025f6..56257ea 100644 (file)
--- 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 *);