bnx2x, bnx2fc: Use per port max exchange resources
The firmware supports a maximum of 4K FCoE exchanges. In 4-port devices,
or when working in multi-function mode, this resource needs to be distributed
between the various possible FCoE functions.
This information needs to be calculated by bnx2x and propagated into bnx2fc
via cnic. bnx2fc can then use this value to calculate corresponding xid
resources instead of using global constants.
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
index 40f22c6..84aecdf 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
@@ -386,4 +386,8 @@
#define UNDEF_IRO 0x80000000
+/* used for defining the amount of FCoE tasks supported for PF */
+#define MAX_FCOE_FUNCS_PER_ENGINE 2
+#define MAX_NUM_FCOE_TASKS_PER_ENGINE 4096
+
#endif /* BNX2X_FW_DEFS_H */
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index fbfff1b..927f83a 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -10791,6 +10791,12 @@
(max_fcoe_conn & BNX2X_MAX_FCOE_INIT_CONN_MASK) >>
BNX2X_MAX_FCOE_INIT_CONN_SHIFT;
+ /* Calculate the number of maximum allowed FCoE tasks */
+ bp->cnic_eth_dev.max_fcoe_exchanges = MAX_NUM_FCOE_TASKS_PER_ENGINE;
+ if (IS_MF(bp) || CHIP_MODE_IS_4_PORT(bp))
+ bp->cnic_eth_dev.max_fcoe_exchanges /=
+ MAX_FCOE_FUNCS_PER_ENGINE;
+
/* Read the WWN: */
if (!IS_MF(bp)) {
/* Port info */
diff --git a/drivers/net/ethernet/broadcom/cnic.c b/drivers/net/ethernet/broadcom/cnic.c
index 149a3a0..40649a8 100644
--- a/drivers/net/ethernet/broadcom/cnic.c
+++ b/drivers/net/ethernet/broadcom/cnic.c
@@ -5544,8 +5544,10 @@
if (!(ethdev->drv_state & CNIC_DRV_STATE_NO_ISCSI))
cdev->max_iscsi_conn = ethdev->max_iscsi_conn;
- if (CNIC_SUPPORTS_FCOE(cp))
+ if (CNIC_SUPPORTS_FCOE(cp)) {
cdev->max_fcoe_conn = ethdev->max_fcoe_conn;
+ cdev->max_fcoe_exchanges = ethdev->max_fcoe_exchanges;
+ }
if (cdev->max_fcoe_conn > BNX2X_FCOE_NUM_CONNECTIONS)
cdev->max_fcoe_conn = BNX2X_FCOE_NUM_CONNECTIONS;
diff --git a/drivers/net/ethernet/broadcom/cnic_if.h b/drivers/net/ethernet/broadcom/cnic_if.h
index 0c9367a..ec9bb9a 100644
--- a/drivers/net/ethernet/broadcom/cnic_if.h
+++ b/drivers/net/ethernet/broadcom/cnic_if.h
@@ -195,6 +195,7 @@
u32 max_fcoe_conn;
u32 max_rdma_conn;
u32 fcoe_init_cid;
+ u32 max_fcoe_exchanges;
u32 fcoe_wwn_port_name_hi;
u32 fcoe_wwn_port_name_lo;
u32 fcoe_wwn_node_name_hi;
@@ -313,6 +314,8 @@
int max_fcoe_conn;
int max_rdma_conn;
+ int max_fcoe_exchanges;
+
union drv_info_to_mcp *stats_addr;
struct fcoe_capabilities *fcoe_cap;