[PATCH cryptodev-2.6 2/3] crypto: cavium/nitrox - add support for per device request statistics.

[Srikanth Jampala]

Add per device statistics like number of requests posted,
dropped and completed etc.

Signed-off-by: Srikanth Jampala <jampala.srika...@cavium.com>
---
 drivers/crypto/cavium/nitrox/nitrox_dev.h    | 7 +++++++
 drivers/crypto/cavium/nitrox/nitrox_main.c   | 5 +++++
 drivers/crypto/cavium/nitrox/nitrox_reqmgr.c | 9 ++++++++-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/cavium/nitrox/nitrox_dev.h 
b/drivers/crypto/cavium/nitrox/nitrox_dev.h
index 1059495ee541..a1442006f256 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_dev.h
+++ b/drivers/crypto/cavium/nitrox/nitrox_dev.h
@@ -75,6 +75,12 @@ struct nitrox_hw {
        u8 zip_cores;
 };
 
+struct nitrox_stats {
+       atomic64_t posted;
+       atomic64_t completed;
+       atomic64_t dropped;
+};
+
 #define MAX_MSIX_VECTOR_NAME   20
 /**
  * vectors for queues (64 AE, 64 SE and 64 ZIP) and
@@ -176,6 +182,7 @@ struct nitrox_device {
        struct nitrox_msix msix;
        struct nitrox_bh bh;
 
+       struct nitrox_stats stats;
        struct nitrox_hw hw;
 #if IS_ENABLED(CONFIG_DEBUG_FS)
        struct dentry *debugfs_dir;
diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c 
b/drivers/crypto/cavium/nitrox/nitrox_main.c
index acce0f0b9c7a..362e7217354c 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_main.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
@@ -542,6 +542,11 @@ static int nitrox_probe(struct pci_dev *pdev,
        if (err)
                goto pf_hw_fail;
 
+       /* clear the statistics */
+       atomic64_set(&ndev->stats.posted, 0);
+       atomic64_set(&ndev->stats.completed, 0);
+       atomic64_set(&ndev->stats.dropped, 0);
+
        atomic_set(&ndev->state, __NDEV_READY);
        /* barrier to sync with other cpus */
        smp_mb__after_atomic();
diff --git a/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c 
b/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
index 4a362fc22f62..f325b48ba904 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
@@ -460,6 +460,9 @@ static void post_se_instr(struct nitrox_softreq *sr,
        cmdq->write_idx = incr_index(idx, 1, ndev->qlen);
 
        spin_unlock_bh(&cmdq->cmdq_lock);
+
+       /* increment the posted command count */
+       atomic64_inc(&ndev->stats.posted);
 }
 
 static int post_backlog_cmds(struct nitrox_cmdq *cmdq)
@@ -508,8 +511,11 @@ static int nitrox_enqueue_request(struct nitrox_softreq 
*sr)
        post_backlog_cmds(cmdq);
 
        if (unlikely(cmdq_full(cmdq, ndev->qlen))) {
-               if (!(sr->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+               if (!(sr->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
+                       /* increment drop count */
+                       atomic64_inc(&ndev->stats.dropped);
                        return -ENOSPC;
+               }
                /* add to backlog list */
                backlog_list_add(sr, cmdq);
                return -EBUSY;
@@ -694,6 +700,7 @@ static void process_response_list(struct nitrox_cmdq *cmdq)
                                            READ_ONCE(sr->resp.orh));
                }
                atomic_dec(&cmdq->pending_count);
+               atomic64_inc(&ndev->stats.completed);
                /* sync with other cpus */
                smp_mb__after_atomic();
                /* remove from response list */
-- 
2.17.1