From abd43a13525db70926999ebe3e272c38119fdfbe Mon Sep 17 00:00:00 2001 From: Venkat Duvvuru Date: Thu, 20 Dec 2018 03:38:52 -0500 Subject: [PATCH] bnxt_en: Support for 64-bit flow handle. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Older firmware only supports 16-bit flow handle, because of which the number of flows that can be offloaded can’t scale beyond a point. Newer firmware supports 64-bit flow handle enabling the host to scale upto millions of flows. With the new 64-bit flow handle support, driver has to query flow stats in a different way compared to the older approach. This patch adds support for 64-bit flow handle and new way to query flow stats. Signed-off-by: Venkat Duvvuru Reviewed-by: Sriharsha Basavapatna Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 +++ drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 + drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c | 74 +++++++++++++++++--- drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h | 5 ++ 4 files changed, 78 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index d3287641ce51..6872db9ac301 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -4055,6 +4055,10 @@ static int bnxt_hwrm_func_drv_rgtr(struct bnxt *bp) cpu_to_le32(FUNC_DRV_RGTR_REQ_ENABLES_VF_REQ_FWD); } + if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) + req.flags |= cpu_to_le32( + FUNC_DRV_RGTR_REQ_FLAGS_FLOW_HANDLE_64BIT_MODE); + mutex_lock(&bp->hwrm_cmd_lock); rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); if (rc) @@ -6662,6 +6666,10 @@ static int bnxt_hwrm_ver_get(struct bnxt *bp) if (dev_caps_cfg & VER_GET_RESP_DEV_CAPS_CFG_KONG_MB_CHNL_SUPPORTED) bp->fw_cap |= BNXT_FW_CAP_KONG_MB_CHNL; + if (dev_caps_cfg & + VER_GET_RESP_DEV_CAPS_CFG_FLOW_HANDLE_64BIT_SUPPORTED) + bp->fw_cap |= BNXT_FW_CAP_OVS_64BIT_HANDLE; + hwrm_ver_get_exit: mutex_unlock(&bp->hwrm_cmd_lock); return rc; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 61d07a4165d8..a451796deefe 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -1478,6 +1478,7 @@ struct bnxt { #define BNXT_FW_CAP_NEW_RM 0x00000008 #define BNXT_FW_CAP_IF_CHANGE 0x00000010 #define BNXT_FW_CAP_KONG_MB_CHNL 0x00000080 + #define BNXT_FW_CAP_OVS_64BIT_HANDLE 0x00000400 #define BNXT_NEW_RM(bp) ((bp)->fw_cap & BNXT_FW_CAP_NEW_RM) u32 hwrm_spec_code; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c index b39584896392..c683b5e96b1d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c @@ -337,18 +337,21 @@ static int bnxt_tc_parse_flow(struct bnxt *bp, return bnxt_tc_parse_actions(bp, &flow->actions, tc_flow_cmd->exts); } -static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp, __le16 flow_handle) +static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp, + struct bnxt_tc_flow_node *flow_node) { struct hwrm_cfa_flow_free_input req = { 0 }; int rc; bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_FREE, -1, -1); - req.flow_handle = flow_handle; + if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) + req.ext_flow_handle = flow_node->ext_flow_handle; + else + req.flow_handle = flow_node->flow_handle; rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); if (rc) - netdev_info(bp->dev, "Error: %s: flow_handle=0x%x rc=%d", - __func__, flow_handle, rc); + netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); if (rc) rc = -EIO; @@ -418,7 +421,8 @@ static bool bits_set(void *key, int len) static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow, __le16 ref_flow_handle, - __le32 tunnel_handle, __le16 *flow_handle) + __le32 tunnel_handle, + struct bnxt_tc_flow_node *flow_node) { struct bnxt_tc_actions *actions = &flow->actions; struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask; @@ -529,7 +533,20 @@ static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow, rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); if (!rc) { resp = bnxt_get_hwrm_resp_addr(bp, &req); - *flow_handle = resp->flow_handle; + /* CFA_FLOW_ALLOC response interpretation: + * fw with fw with + * 16-bit 64-bit + * flow handle flow handle + * =========== =========== + * flow_handle flow handle flow context id + * ext_flow_handle INVALID flow handle + * flow_id INVALID flow counter id + */ + flow_node->flow_handle = resp->flow_handle; + if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) { + flow_node->ext_flow_handle = resp->ext_flow_handle; + flow_node->flow_id = resp->flow_id; + } } mutex_unlock(&bp->hwrm_cmd_lock); @@ -1228,7 +1245,7 @@ static int __bnxt_tc_del_flow(struct bnxt *bp, int rc; /* send HWRM cmd to free the flow-id */ - bnxt_hwrm_cfa_flow_free(bp, flow_node->flow_handle); + bnxt_hwrm_cfa_flow_free(bp, flow_node); mutex_lock(&tc_info->lock); @@ -1250,6 +1267,12 @@ static int __bnxt_tc_del_flow(struct bnxt *bp, return 0; } +static void bnxt_tc_set_flow_dir(struct bnxt *bp, struct bnxt_tc_flow *flow, + u16 src_fid) +{ + flow->dir = (bp->pf.fw_fid == src_fid) ? BNXT_DIR_RX : BNXT_DIR_TX; +} + static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow, u16 src_fid) { @@ -1297,6 +1320,9 @@ static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid, bnxt_tc_set_src_fid(bp, flow, src_fid); + if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) + bnxt_tc_set_flow_dir(bp, flow, src_fid); + if (!bnxt_tc_can_offload(bp, flow)) { rc = -ENOSPC; goto free_node; @@ -1324,7 +1350,7 @@ static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid, /* send HWRM cmd to alloc the flow */ rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle, - tunnel_handle, &new_node->flow_handle); + tunnel_handle, new_node); if (rc) goto put_tunnel; @@ -1340,7 +1366,7 @@ static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid, return 0; hwrm_flow_free: - bnxt_hwrm_cfa_flow_free(bp, new_node->flow_handle); + bnxt_hwrm_cfa_flow_free(bp, new_node); put_tunnel: bnxt_tc_put_tunnel_handle(bp, flow, new_node); put_l2: @@ -1401,6 +1427,32 @@ static int bnxt_tc_get_flow_stats(struct bnxt *bp, return 0; } +static void bnxt_fill_cfa_stats_req(struct bnxt *bp, + struct bnxt_tc_flow_node *flow_node, + __le16 *flow_handle, __le32 *flow_id) +{ + u16 handle; + + if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) { + *flow_id = flow_node->flow_id; + + /* If flow_id is used to fetch flow stats then: + * 1. lower 12 bits of flow_handle must be set to all 1s. + * 2. 15th bit of flow_handle must specify the flow + * direction (TX/RX). + */ + if (flow_node->flow.dir == BNXT_DIR_RX) + handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_DIR_RX | + CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK; + else + handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK; + + *flow_handle = cpu_to_le16(handle); + } else { + *flow_handle = flow_node->flow_handle; + } +} + static int bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows, struct bnxt_tc_stats_batch stats_batch[]) @@ -1408,6 +1460,7 @@ bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows, struct hwrm_cfa_flow_stats_input req = { 0 }; struct hwrm_cfa_flow_stats_output *resp; __le16 *req_flow_handles = &req.flow_handle_0; + __le32 *req_flow_ids = &req.flow_id_0; int rc, i; bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1); @@ -1415,7 +1468,8 @@ bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows, for (i = 0; i < num_flows; i++) { struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node; - req_flow_handles[i] = flow_node->flow_handle; + bnxt_fill_cfa_stats_req(bp, flow_node, + &req_flow_handles[i], &req_flow_ids[i]); } mutex_lock(&bp->hwrm_cmd_lock); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h index 97e09a880693..8a0968967bc5 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h @@ -98,6 +98,9 @@ struct bnxt_tc_flow { /* flow applicable to pkts ingressing on this fid */ u16 src_fid; + u8 dir; +#define BNXT_DIR_RX 1 +#define BNXT_DIR_TX 0 struct bnxt_tc_l2_key l2_key; struct bnxt_tc_l2_key l2_mask; struct bnxt_tc_l3_key l3_key; @@ -170,7 +173,9 @@ struct bnxt_tc_flow_node { struct bnxt_tc_flow flow; + __le64 ext_flow_handle; __le16 flow_handle; + __le32 flow_id; /* L2 node in l2 hashtable that shares flow's l2 key */ struct bnxt_tc_l2_node *l2_node; -- 2.30.2