RDMA/cxgb4: Add debugfs RDMA memory stats

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

5 files changed, 155 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index 6d0df6ec161b..84831119c596 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -240,6 +240,62 @@ static const struct file_operations stag_debugfs_fops = {
         .llseek  = default_llseek,
 };
 
+static int stats_show(struct seq_file *seq, void *v)
+{
+        struct c4iw_dev *dev = seq->private;
+
+        seq_printf(seq, " Object: %10s %10s %10s\n", "Total", "Current", "Max");
+        seq_printf(seq, "     PDID: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
+                        dev->rdev.stats.pd.max);
+        seq_printf(seq, "      QID: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
+                        dev->rdev.stats.qid.max);
+        seq_printf(seq, "   TPTMEM: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
+                        dev->rdev.stats.stag.max);
+        seq_printf(seq, "   PBLMEM: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
+                        dev->rdev.stats.pbl.max);
+        seq_printf(seq, "   RQTMEM: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
+                        dev->rdev.stats.rqt.max);
+        seq_printf(seq, "  OCQPMEM: %10llu %10llu %10llu\n",
+                        dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
+                        dev->rdev.stats.ocqp.max);
+        return 0;
+}
+
+static int stats_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, stats_show, inode->i_private);
+}
+
+static ssize_t stats_clear(struct file *file, const char __user *buf,
+                size_t count, loff_t *pos)
+{
+        struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
+
+        mutex_lock(&dev->rdev.stats.lock);
+        dev->rdev.stats.pd.max = 0;
+        dev->rdev.stats.qid.max = 0;
+        dev->rdev.stats.stag.max = 0;
+        dev->rdev.stats.pbl.max = 0;
+        dev->rdev.stats.rqt.max = 0;
+        dev->rdev.stats.ocqp.max = 0;
+        mutex_unlock(&dev->rdev.stats.lock);
+        return count;
+}
+
+static const struct file_operations stats_debugfs_fops = {
+        .owner   = THIS_MODULE,
+        .open    = stats_open,
+        .release = single_release,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .write   = stats_clear,
+};
+
 static int setup_debugfs(struct c4iw_dev *devp)
 {
         struct dentry *de;
@@ -256,6 +312,12 @@ static int setup_debugfs(struct c4iw_dev *devp)
                                  (void *)devp, &stag_debugfs_fops);
         if (de && de->d_inode)
                 de->d_inode->i_size = 4096;
+
+        de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root,
+                        (void *)devp, &stats_debugfs_fops);
+        if (de && de->d_inode)
+                de->d_inode->i_size = 4096;
+
         return 0;
 }
 
@@ -269,9 +331,13 @@ void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
         list_for_each_safe(pos, nxt, &uctx->qpids) {
                 entry = list_entry(pos, struct c4iw_qid_list, entry);
                 list_del_init(&entry->entry);
-                if (!(entry->qid & rdev->qpmask))
+                if (!(entry->qid & rdev->qpmask)) {
                         c4iw_put_resource(&rdev->resource.qid_fifo, entry->qid,
-                                          &rdev->resource.qid_fifo_lock);
+                                        &rdev->resource.qid_fifo_lock);
+                        mutex_lock(&rdev->stats.lock);
+                        rdev->stats.qid.cur -= rdev->qpmask + 1;
+                        mutex_unlock(&rdev->stats.lock);
+                }
                 kfree(entry);
         }
 
@@ -332,6 +398,13 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
                 goto err1;
         }
 
+        rdev->stats.pd.total = T4_MAX_NUM_PD;
+        rdev->stats.stag.total = rdev->lldi.vr->stag.size;
+        rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
+        rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
+        rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
+        rdev->stats.qid.total = rdev->lldi.vr->qp.size;
+
         err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
         if (err) {
                 printk(KERN_ERR MOD "error %d initializing resources\n", err);
@@ -440,6 +513,7 @@ static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
         idr_init(&devp->qpidr);
         idr_init(&devp->mmidr);
         spin_lock_init(&devp->lock);
+        mutex_init(&devp->rdev.stats.lock);
 
         if (c4iw_debugfs_root) {
                 devp->debugfs_root = debugfs_create_dir(
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index 1357c5bf209b..a8490746d86c 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -103,6 +103,22 @@ enum c4iw_rdev_flags {
         T4_FATAL_ERROR = (1<<0),
 };
 
+struct c4iw_stat {
+        u64 total;
+        u64 cur;
+        u64 max;
+};
+
+struct c4iw_stats {
+        struct mutex lock;
+        struct c4iw_stat qid;
+        struct c4iw_stat pd;
+        struct c4iw_stat stag;
+        struct c4iw_stat pbl;
+        struct c4iw_stat rqt;
+        struct c4iw_stat ocqp;
+};
+
 struct c4iw_rdev {
         struct c4iw_resource resource;
         unsigned long qpshift;
@@ -117,6 +133,7 @@ struct c4iw_rdev {
         struct cxgb4_lld_info lldi;
         unsigned long oc_mw_pa;
         void __iomem *oc_mw_kva;
+        struct c4iw_stats stats;
 };
 
 static inline int c4iw_fatal_error(struct c4iw_rdev *rdev)
diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index 40c835309e49..2a87379f52a3 100644
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -135,6 +135,11 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
                                              &rdev->resource.tpt_fifo_lock);
                 if (!stag_idx)
                         return -ENOMEM;
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.stag.cur += 32;
+                if (rdev->stats.stag.cur > rdev->stats.stag.max)
+                        rdev->stats.stag.max = rdev->stats.stag.cur;
+                mutex_unlock(&rdev->stats.lock);
                 *stag = (stag_idx << 8) | (atomic_inc_return(&key) & 0xff);
         }
         PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
@@ -165,9 +170,13 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
                                 (rdev->lldi.vr->stag.start >> 5),
                                 sizeof(tpt), &tpt);
 
-        if (reset_tpt_entry)
+        if (reset_tpt_entry) {
                 c4iw_put_resource(&rdev->resource.tpt_fifo, stag_idx,
                                   &rdev->resource.tpt_fifo_lock);
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.stag.cur -= 32;
+                mutex_unlock(&rdev->stats.lock);
+        }
         return err;
 }
 
diff --git a/drivers/infiniband/hw/cxgb4/provider.c b/drivers/infiniband/hw/cxgb4/provider.c
index be1c18f44400..8d58736f9b4f 100644
--- a/drivers/infiniband/hw/cxgb4/provider.c
+++ b/drivers/infiniband/hw/cxgb4/provider.c
@@ -190,6 +190,9 @@ static int c4iw_deallocate_pd(struct ib_pd *pd)
         PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
         c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid,
                           &rhp->rdev.resource.pdid_fifo_lock);
+        mutex_lock(&rhp->rdev.stats.lock);
+        rhp->rdev.stats.pd.cur--;
+        mutex_unlock(&rhp->rdev.stats.lock);
         kfree(php);
         return 0;
 }
@@ -222,6 +225,11 @@ static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
                         return ERR_PTR(-EFAULT);
                 }
         }
+        mutex_lock(&rhp->rdev.stats.lock);
+        rhp->rdev.stats.pd.cur++;
+        if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
+                rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
+        mutex_unlock(&rhp->rdev.stats.lock);
         PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
         return &php->ibpd;
 }
diff --git a/drivers/infiniband/hw/cxgb4/resource.c b/drivers/infiniband/hw/cxgb4/resource.c
index 407ff3924150..1b948d192d32 100644
--- a/drivers/infiniband/hw/cxgb4/resource.c
+++ b/drivers/infiniband/hw/cxgb4/resource.c
@@ -185,6 +185,9 @@ u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
                                         &rdev->resource.qid_fifo_lock);
                 if (!qid)
                         goto out;
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.qid.cur += rdev->qpmask + 1;
+                mutex_unlock(&rdev->stats.lock);
                 for (i = qid+1; i & rdev->qpmask; i++) {
                         entry = kmalloc(sizeof *entry, GFP_KERNEL);
                         if (!entry)
@@ -213,6 +216,10 @@ u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
 out:
         mutex_unlock(&uctx->lock);
         PDBG("%s qid 0x%x\n", __func__, qid);
+        mutex_lock(&rdev->stats.lock);
+        if (rdev->stats.qid.cur > rdev->stats.qid.max)
+                rdev->stats.qid.max = rdev->stats.qid.cur;
+        mutex_unlock(&rdev->stats.lock);
         return qid;
 }
 
@@ -249,6 +256,9 @@ u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
                                         &rdev->resource.qid_fifo_lock);
                 if (!qid)
                         goto out;
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.qid.cur += rdev->qpmask + 1;
+                mutex_unlock(&rdev->stats.lock);
                 for (i = qid+1; i & rdev->qpmask; i++) {
                         entry = kmalloc(sizeof *entry, GFP_KERNEL);
                         if (!entry)
@@ -277,6 +287,10 @@ u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
 out:
         mutex_unlock(&uctx->lock);
         PDBG("%s qid 0x%x\n", __func__, qid);
+        mutex_lock(&rdev->stats.lock);
+        if (rdev->stats.qid.cur > rdev->stats.qid.max)
+                rdev->stats.qid.max = rdev->stats.qid.cur;
+        mutex_unlock(&rdev->stats.lock);
         return qid;
 }
 
@@ -315,12 +329,22 @@ u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size)
         if (!addr)
                 printk_ratelimited(KERN_WARNING MOD "%s: Out of PBL memory\n",
                        pci_name(rdev->lldi.pdev));
+        if (addr) {
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.pbl.cur += roundup(size, 1 << MIN_PBL_SHIFT);
+                if (rdev->stats.pbl.cur > rdev->stats.pbl.max)
+                        rdev->stats.pbl.max = rdev->stats.pbl.cur;
+                mutex_unlock(&rdev->stats.lock);
+        }
         return (u32)addr;
 }
 
 void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
 {
         PDBG("%s addr 0x%x size %d\n", __func__, addr, size);
+        mutex_lock(&rdev->stats.lock);
+        rdev->stats.pbl.cur -= roundup(size, 1 << MIN_PBL_SHIFT);
+        mutex_unlock(&rdev->stats.lock);
         gen_pool_free(rdev->pbl_pool, (unsigned long)addr, size);
 }
 
@@ -377,12 +401,22 @@ u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size)
         if (!addr)
                 printk_ratelimited(KERN_WARNING MOD "%s: Out of RQT memory\n",
                        pci_name(rdev->lldi.pdev));
+        if (addr) {
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.rqt.cur += roundup(size << 6, 1 << MIN_RQT_SHIFT);
+                if (rdev->stats.rqt.cur > rdev->stats.rqt.max)
+                        rdev->stats.rqt.max = rdev->stats.rqt.cur;
+                mutex_unlock(&rdev->stats.lock);
+        }
         return (u32)addr;
 }
 
 void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
 {
         PDBG("%s addr 0x%x size %d\n", __func__, addr, size << 6);
+        mutex_lock(&rdev->stats.lock);
+        rdev->stats.rqt.cur -= roundup(size << 6, 1 << MIN_RQT_SHIFT);
+        mutex_unlock(&rdev->stats.lock);
         gen_pool_free(rdev->rqt_pool, (unsigned long)addr, size << 6);
 }
 
@@ -433,12 +467,22 @@ u32 c4iw_ocqp_pool_alloc(struct c4iw_rdev *rdev, int size)
 {
         unsigned long addr = gen_pool_alloc(rdev->ocqp_pool, size);
         PDBG("%s addr 0x%x size %d\n", __func__, (u32)addr, size);
+        if (addr) {
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.ocqp.cur += roundup(size, 1 << MIN_OCQP_SHIFT);
+                if (rdev->stats.ocqp.cur > rdev->stats.ocqp.max)
+                        rdev->stats.ocqp.max = rdev->stats.ocqp.cur;
+                mutex_unlock(&rdev->stats.lock);
+        }
         return (u32)addr;
 }
 
 void c4iw_ocqp_pool_free(struct c4iw_rdev *rdev, u32 addr, int size)
 {
         PDBG("%s addr 0x%x size %d\n", __func__, addr, size);
+        mutex_lock(&rdev->stats.lock);
+        rdev->stats.ocqp.cur -= roundup(size, 1 << MIN_OCQP_SHIFT);
+        mutex_unlock(&rdev->stats.lock);
         gen_pool_free(rdev->ocqp_pool, (unsigned long)addr, size);
 }