diff options
| author | Dmitry Kravkov <dmitry@broadcom.com> | 2013-05-27 04:08:29 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-28 04:41:49 (GMT) |
| commit | 868001946e39627ec439921eeb0f5fa020e1e31d (patch) | |
| tree | 2be31acf1b1faf5f958cee715b57390541ffbfc4 /drivers | |
| parent | 70ca5d746cf0c16576cee43fea6a19116ab49d9c (diff) | |
| download | linux-868001946e39627ec439921eeb0f5fa020e1e31d.tar.xz | |
bnx2x: Count number of possible FCoE interfaces
Commit 0eb43b4bb081a1a22574daab9c05286a600dd7fe
"bnx2x, bnx2fc: Use per port max exchange resources" has changed the number
of available FCoE exchanges, even in scenarios when some of the functions has
no FCoE support; This needlessly degraded the available resources.
Remedy this by calculating the maximal number of functions that may actually
utilize said connection.
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
CC: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c index 04fa510..0a3bb53 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c @@ -10795,12 +10795,56 @@ static void bnx2x_get_ext_wwn_info(struct bnx2x *bp, int func) bp->cnic_eth_dev.fcoe_wwn_node_name_lo = MF_CFG_RD(bp, func_ext_config[func].fcoe_wwn_node_name_lower); } + +static int bnx2x_shared_fcoe_funcs(struct bnx2x *bp) +{ + u8 count = 0; + + if (IS_MF(bp)) { + u8 fid; + + /* iterate over absolute function ids for this path: */ + for (fid = BP_PATH(bp); fid < E2_FUNC_MAX * 2; fid += 2) { + if (IS_MF_SD(bp)) { + u32 cfg = MF_CFG_RD(bp, + func_mf_config[fid].config); + + if (!(cfg & FUNC_MF_CFG_FUNC_HIDE) && + ((cfg & FUNC_MF_CFG_PROTOCOL_MASK) == + FUNC_MF_CFG_PROTOCOL_FCOE)) + count++; + } else { + u32 cfg = MF_CFG_RD(bp, + func_ext_config[fid]. + func_cfg); + + if ((cfg & MACP_FUNC_CFG_FLAGS_ENABLED) && + (cfg & MACP_FUNC_CFG_FLAGS_FCOE_OFFLOAD)) + count++; + } + } + } else { /* SF */ + int port, port_cnt = CHIP_MODE_IS_4_PORT(bp) ? 2 : 1; + + for (port = 0; port < port_cnt; port++) { + u32 lic = SHMEM_RD(bp, + drv_lic_key[port].max_fcoe_conn) ^ + FW_ENCODE_32BIT_PATTERN; + if (lic) + count++; + } + } + + return count; +} + static void bnx2x_get_fcoe_info(struct bnx2x *bp) { int port = BP_PORT(bp); int func = BP_ABS_FUNC(bp); u32 max_fcoe_conn = FW_ENCODE_32BIT_PATTERN ^ SHMEM_RD(bp, drv_lic_key[port].max_fcoe_conn); + u8 num_fcoe_func = bnx2x_shared_fcoe_funcs(bp); if (!CNIC_SUPPORT(bp)) { bp->flags |= NO_FCOE_FLAG; @@ -10814,9 +10858,10 @@ static void bnx2x_get_fcoe_info(struct bnx2x *bp) /* 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; + + /* check if FCoE resources must be shared between different functions */ + if (num_fcoe_func) + bp->cnic_eth_dev.max_fcoe_exchanges /= num_fcoe_func; /* Read the WWN: */ if (!IS_MF(bp)) { |