Commit 897e370d authored by Sudarsana Reddy Kalluru's avatar Sudarsana Reddy Kalluru Committed by Greg Kroah-Hartman

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: default avatarSudarsana Reddy Kalluru <>
Signed-off-by: default avatarMichal Kalderon <>
Signed-off-by: default avatarDavid S. Miller <>
Signed-off-by: default avatarSasha Levin <>
parent dc08fb59
......@@ -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 + \
/* 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
......@@ -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);
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