qed: Optimize execution time for nvm attributes configuration.

Current implementation for nvm_attr configuration instructs the management
FW to load/unload the nvm-cfg image for each user-provided attribute in
the input file. This consumes lot of cycles even for few tens of
attributes.
This patch updates the implementation to perform load/commit of the config
for every 50 attributes. After loading the nvm-image, MFW expects that
config should be committed in a predefined timer value (5 sec), hence it's
not possible to write large number of attributes in a single load/commit
window. Hence performing the commits in chunks.

Fixes: 0dabbe1bb3a4 ("qed: Add driver API for flashing the config attributes.")
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c
index 2ce7009..38f7f40 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -67,10 +67,9 @@
 #define QED_ROCE_QPS                   (8192)
 #define QED_ROCE_DPIS                  (8)
 #define QED_RDMA_SRQS                   QED_ROCE_QPS
-#define QED_NVM_CFG_SET_FLAGS          0xE
-#define QED_NVM_CFG_SET_PF_FLAGS       0x1E
 #define QED_NVM_CFG_GET_FLAGS          0xA
 #define QED_NVM_CFG_GET_PF_FLAGS       0x1A
+#define QED_NVM_CFG_MAX_ATTRS          50
 
 static char version[] =
        "QLogic FastLinQ 4xxxx Core Module qed " DRV_MODULE_VERSION "\n";
@@ -2255,6 +2254,7 @@ static int qed_nvm_flash_cfg_write(struct qed_dev *cdev, const u8 **data)
 {
        struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
        u8 entity_id, len, buf[32];
+       bool need_nvm_init = true;
        struct qed_ptt *ptt;
        u16 cfg_id, count;
        int rc = 0, i;
@@ -2271,8 +2271,10 @@ static int qed_nvm_flash_cfg_write(struct qed_dev *cdev, const u8 **data)
 
        DP_VERBOSE(cdev, NETIF_MSG_DRV,
                   "Read config ids: num_attrs = %0d\n", count);
-       /* NVM CFG ID attributes */
-       for (i = 0; i < count; i++) {
+       /* NVM CFG ID attributes. Start loop index from 1 to avoid additional
+        * arithmetic operations in the implementation.
+        */
+       for (i = 1; i <= count; i++) {
                cfg_id = *((u16 *)*data);
                *data += 2;
                entity_id = **data;
@@ -2282,8 +2284,21 @@ static int qed_nvm_flash_cfg_write(struct qed_dev *cdev, const u8 **data)
                memcpy(buf, *data, len);
                *data += len;
 
-               flags = entity_id ? QED_NVM_CFG_SET_PF_FLAGS :
-                       QED_NVM_CFG_SET_FLAGS;
+               flags = 0;
+               if (need_nvm_init) {
+                       flags |= QED_NVM_CFG_OPTION_INIT;
+                       need_nvm_init = false;
+               }
+
+               /* Commit to flash and free the resources */
+               if (!(i % QED_NVM_CFG_MAX_ATTRS) || i == count) {
+                       flags |= QED_NVM_CFG_OPTION_COMMIT |
+                                QED_NVM_CFG_OPTION_FREE;
+                       need_nvm_init = true;
+               }
+
+               if (entity_id)
+                       flags |= QED_NVM_CFG_OPTION_ENTITY_SEL;
 
                DP_VERBOSE(cdev, NETIF_MSG_DRV,
                           "cfg_id = %d entity = %d len = %d\n", cfg_id,