bnx2x: Assign unique DMAE channel number for FW DMAE transactions.

[ Upstream commit 77e461d14ed141253573eeeb4d34eccc51e38328 ]

Driver assigns DMAE channel 0 for FW as part of START_RAMROD command. FW
uses this channel for DMAE operations (e.g., TIME_SYNC implementation).
Driver also uses the same channel 0 for DMAE operations for some of the PFs
(e.g., PF0 on Port0). This could lead to concurrent access to the DMAE
channel by FW and driver which is not legal. Hence need to assign unique
DMAE id for FW.
Currently following DMAE channels are used by the clients,
  MFW - OCBB/OCSD functionality uses DMAE channel 14/15
  Driver 0-3 and 8-11 (for PF dmae operations)
         4 and 12 (for stats requests)
Assigning unique dmae_id '13' to the FW.

Changes from previous version:
------------------------------
v2: Incorporated the review comments.

Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index f3f2d66432ab6bda52285ae31e9fb786e155b7d7..d5e4c42662b6c82b36388dc6fcf9aa9779a049d0 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -2187,6 +2187,13 @@ void bnx2x_igu_clear_sb_gen(struct bnx2x *bp, u8 func, u8 idu_sb_id,
 #define PMF_DMAE_C(bp)                 (BP_PORT(bp) * MAX_DMAE_C_PER_PORT + \
                                         E1HVN_MAX)
 
+/* Following is the DMAE channel number allocation for the clients.
+ *   MFW: OCBB/OCSD implementations use DMAE channels 14/15 respectively.
+ *   Driver: 0-3 and 8-11 (for PF dmae operations)
+ *           4 and 12 (for stats requests)
+ */
+#define BNX2X_FW_DMAE_C                 13 /* Channel for FW DMAE operations */
+
 /* PCIE link and speed */
 #define PCICFG_LINK_WIDTH              0x1f00000
 #define PCICFG_LINK_WIDTH_SHIFT                20

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
index cea6bdcde33f0be220815378142ea9e8dfc7ba37..bf760c9cff6ad2fa7dad6e9ee41a2b1c7f7046e0 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
@@ -6149,6 +6149,7 @@ static inline int bnx2x_func_send_start(struct bnx2x *bp,
        rdata->sd_vlan_tag      = cpu_to_le16(start_params->sd_vlan_tag);
        rdata->path_id          = BP_PATH(bp);
        rdata->network_cos_mode = start_params->network_cos_mode;
+       rdata->dmae_cmd_id      = BNX2X_FW_DMAE_C;
 
        rdata->vxlan_dst_port   = cpu_to_le16(start_params->vxlan_dst_port);
        rdata->geneve_dst_port  = cpu_to_le16(start_params->geneve_dst_port);