From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Chan Subject: [PATCH net-next 11/16] bnxt_en: Improve ring allocation logic. Date: Sat, 31 Mar 2018 13:54:16 -0400 Message-ID: <1522518861-9845-12-git-send-email-michael.chan@broadcom.com> References: <1522518861-9845-1-git-send-email-michael.chan@broadcom.com> Cc: netdev@vger.kernel.org To: davem@davemloft.net Return-path: Received: from mail-pg0-f66.google.com ([74.125.83.66]:44538 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753247AbeCaRzJ (ORCPT ); Sat, 31 Mar 2018 13:55:09 -0400 Received: by mail-pg0-f66.google.com with SMTP id v26so6895444pge.11 for ; Sat, 31 Mar 2018 10:55:09 -0700 (PDT) In-Reply-To: <1522518861-9845-1-git-send-email-michael.chan@broadcom.com> Sender: netdev-owner@vger.kernel.org List-ID: Currently, the driver code makes some assumptions about the group index and the map index of rings. This makes the code more difficult to understand and less flexible. Improve it by adding the grp_idx and map_idx fields explicitly to the bnxt_ring_struct as a union. The grp_idx is initialized for each tx ring and rx agg ring during init. time. We do the same for the map_idx for each cmpl ring. The grp_idx ties the tx ring to the ring group. The map_idx is the doorbell index of the ring. With this new infrastructure, we can change the ring index mapping scheme easily in the future. Signed-off-by: Michael Chan --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 32 ++++++++++++++++--------------- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 4 ++++ 2 files changed, 21 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 6fcf4dc..8c8ef6b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -2317,6 +2317,7 @@ static int bnxt_alloc_rx_rings(struct bnxt *bp) if (rc) return rc; + ring->grp_idx = i; rxr->rx_agg_bmap_size = bp->rx_agg_ring_mask + 1; mem_size = rxr->rx_agg_bmap_size / 8; rxr->rx_agg_bmap = kzalloc(mem_size, GFP_KERNEL); @@ -2389,6 +2390,7 @@ static int bnxt_alloc_tx_rings(struct bnxt *bp) if (rc) return rc; + ring->grp_idx = txr->bnapi->index; if (bp->tx_push_size) { dma_addr_t mapping; @@ -2458,6 +2460,7 @@ static int bnxt_alloc_cp_rings(struct bnxt *bp) rc = bnxt_alloc_ring(bp, ring); if (rc) return rc; + ring->map_idx = i; } return 0; } @@ -4253,12 +4256,12 @@ static int bnxt_hwrm_ring_grp_free(struct bnxt *bp) static int hwrm_ring_alloc_send_msg(struct bnxt *bp, struct bnxt_ring_struct *ring, - u32 ring_type, u32 map_index, - u32 stats_ctx_id) + u32 ring_type, u32 map_index) { int rc = 0, err = 0; struct hwrm_ring_alloc_input req = {0}; struct hwrm_ring_alloc_output *resp = bp->hwrm_cmd_resp_addr; + struct bnxt_ring_grp_info *grp_info; u16 ring_id; bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_RING_ALLOC, -1, -1); @@ -4280,10 +4283,10 @@ static int hwrm_ring_alloc_send_msg(struct bnxt *bp, case HWRM_RING_ALLOC_TX: req.ring_type = RING_ALLOC_REQ_RING_TYPE_TX; /* Association of transmit ring with completion ring */ - req.cmpl_ring_id = - cpu_to_le16(bp->grp_info[map_index].cp_fw_ring_id); + grp_info = &bp->grp_info[ring->grp_idx]; + req.cmpl_ring_id = cpu_to_le16(grp_info->cp_fw_ring_id); req.length = cpu_to_le32(bp->tx_ring_mask + 1); - req.stat_ctx_id = cpu_to_le32(stats_ctx_id); + req.stat_ctx_id = cpu_to_le32(grp_info->fw_stats_ctx); req.queue_id = cpu_to_le16(ring->queue_id); break; case HWRM_RING_ALLOC_RX: @@ -4370,10 +4373,11 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp) struct bnxt_napi *bnapi = bp->bnapi[i]; struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring; struct bnxt_ring_struct *ring = &cpr->cp_ring_struct; + u32 map_idx = ring->map_idx; - cpr->cp_doorbell = bp->bar1 + i * 0x80; - rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_CMPL, i, - INVALID_STATS_CTX_ID); + cpr->cp_doorbell = bp->bar1 + map_idx * 0x80; + rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_CMPL, + map_idx); if (rc) goto err_out; BNXT_CP_DB(cpr->cp_doorbell, cpr->cp_raw_cons); @@ -4389,11 +4393,10 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp) for (i = 0; i < bp->tx_nr_rings; i++) { struct bnxt_tx_ring_info *txr = &bp->tx_ring[i]; struct bnxt_ring_struct *ring = &txr->tx_ring_struct; - u32 map_idx = txr->bnapi->index; - u16 fw_stats_ctx = bp->grp_info[map_idx].fw_stats_ctx; + u32 map_idx = i; rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_TX, - map_idx, fw_stats_ctx); + map_idx); if (rc) goto err_out; txr->tx_doorbell = bp->bar1 + map_idx * 0x80; @@ -4405,7 +4408,7 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp) u32 map_idx = rxr->bnapi->index; rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_RX, - map_idx, INVALID_STATS_CTX_ID); + map_idx); if (rc) goto err_out; rxr->rx_doorbell = bp->bar1 + map_idx * 0x80; @@ -4418,13 +4421,12 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp) struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i]; struct bnxt_ring_struct *ring = &rxr->rx_agg_ring_struct; - u32 grp_idx = rxr->bnapi->index; + u32 grp_idx = ring->grp_idx; u32 map_idx = grp_idx + bp->rx_nr_rings; rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_AGG, - map_idx, - INVALID_STATS_CTX_ID); + map_idx); if (rc) goto err_out; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 22aa290..e0cd0cb 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -573,6 +573,10 @@ struct bnxt_ring_struct { void **vmem; u16 fw_ring_id; /* Ring id filled by Chimp FW */ + union { + u16 grp_idx; + u16 map_idx; /* Used by cmpl rings */ + }; u8 queue_id; }; -- 1.8.3.1