From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752114AbeBVXIa (ORCPT ); Thu, 22 Feb 2018 18:08:30 -0500 Received: from mail-bn3nam01on0071.outbound.protection.outlook.com ([104.47.33.71]:20512 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751968AbeBVXHi (ORCPT ); Thu, 22 Feb 2018 18:07:38 -0500 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=David.Daney@cavium.com; From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org, James Hogan Cc: linux-kernel@vger.kernel.org, "Steven J. Hill" , netdev@vger.kernel.org, "David S. Miller" , David Daney Subject: [PATCH v8 3/4] staging: octeon: Remove USE_ASYNC_IOBDMA macro. 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Remove USE_ASYNC_IOBDMA from all if statements. Remove dead code caused by the change. Acked-by: Greg Kroah-Hartman Signed-off-by: David Daney --- drivers/staging/octeon/ethernet-defines.h | 6 --- drivers/staging/octeon/ethernet-rx.c | 25 ++++----- drivers/staging/octeon/ethernet-tx.c | 85 ++++++++++--------------------- 3 files changed, 37 insertions(+), 79 deletions(-) diff --git a/drivers/staging/octeon/ethernet-defines.h b/drivers/staging/octeon/ethernet-defines.h index 33c71f86890b..15db928c4712 100644 --- a/drivers/staging/octeon/ethernet-defines.h +++ b/drivers/staging/octeon/ethernet-defines.h @@ -7,10 +7,6 @@ /* * A few defines are used to control the operation of this driver: - * USE_ASYNC_IOBDMA - * Use asynchronous IO access to hardware. This uses Octeon's asynchronous - * IOBDMAs to issue IO accesses without stalling. Set this to zero - * to disable this. Note that IOBDMAs require CVMSEG. * REUSE_SKBUFFS_WITHOUT_FREE * Allows the TX path to free an skbuff into the FPA hardware pool. This * can significantly improve performance for forwarding and bridging, but @@ -29,8 +25,6 @@ #define REUSE_SKBUFFS_WITHOUT_FREE 1 #endif -#define USE_ASYNC_IOBDMA 1 - /* Maximum number of SKBs to try to free per xmit packet. */ #define MAX_OUT_QUEUE_DEPTH 1000 diff --git a/drivers/staging/octeon/ethernet-rx.c b/drivers/staging/octeon/ethernet-rx.c index 5e271245273c..c1ae60ce11f5 100644 --- a/drivers/staging/octeon/ethernet-rx.c +++ b/drivers/staging/octeon/ethernet-rx.c @@ -198,11 +198,9 @@ static int cvm_oct_poll(struct oct_rx_group *rx_group, int budget) /* Prefetch cvm_oct_device since we know we need it soon */ prefetch(cvm_oct_device); - if (USE_ASYNC_IOBDMA) { - /* Save scratch in case userspace is using it */ - CVMX_SYNCIOBDMA; - old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH); - } + /* Save scratch in case userspace is using it */ + CVMX_SYNCIOBDMA; + old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH); /* Only allow work for our group (and preserve priorities) */ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) { @@ -217,10 +215,8 @@ static int cvm_oct_poll(struct oct_rx_group *rx_group, int budget) BIT(rx_group->group)); } - if (USE_ASYNC_IOBDMA) { - cvmx_pow_work_request_async(CVMX_SCR_SCRATCH, CVMX_POW_NO_WAIT); - did_work_request = 1; - } + cvmx_pow_work_request_async(CVMX_SCR_SCRATCH, CVMX_POW_NO_WAIT); + did_work_request = 1; while (rx_count < budget) { struct sk_buff *skb = NULL; @@ -229,7 +225,7 @@ static int cvm_oct_poll(struct oct_rx_group *rx_group, int budget) cvmx_wqe_t *work; int port; - if (USE_ASYNC_IOBDMA && did_work_request) + if (did_work_request) work = cvmx_pow_work_response_async(CVMX_SCR_SCRATCH); else work = cvmx_pow_work_request_sync(CVMX_POW_NO_WAIT); @@ -257,7 +253,7 @@ static int cvm_oct_poll(struct oct_rx_group *rx_group, int budget) sizeof(void *)); prefetch(pskb); - if (USE_ASYNC_IOBDMA && rx_count < (budget - 1)) { + if (rx_count < (budget - 1)) { cvmx_pow_work_request_async_nocheck(CVMX_SCR_SCRATCH, CVMX_POW_NO_WAIT); did_work_request = 1; @@ -400,10 +396,9 @@ static int cvm_oct_poll(struct oct_rx_group *rx_group, int budget) cvmx_write_csr(CVMX_POW_PP_GRP_MSKX(coreid), old_group_mask); } - if (USE_ASYNC_IOBDMA) { - /* Restore the scratch area */ - cvmx_scratch_write64(CVMX_SCR_SCRATCH, old_scratch); - } + /* Restore the scratch area */ + cvmx_scratch_write64(CVMX_SCR_SCRATCH, old_scratch); + cvm_oct_rx_refill_pool(0); return rx_count; diff --git a/drivers/staging/octeon/ethernet-tx.c b/drivers/staging/octeon/ethernet-tx.c index df3441b815bb..2aa5fcb7ee32 100644 --- a/drivers/staging/octeon/ethernet-tx.c +++ b/drivers/staging/octeon/ethernet-tx.c @@ -176,23 +176,18 @@ int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev) qos = 0; } - if (USE_ASYNC_IOBDMA) { - /* Save scratch in case userspace is using it */ - CVMX_SYNCIOBDMA; - old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH); - old_scratch2 = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8); - - /* - * Fetch and increment the number of packets to be - * freed. - */ - cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH + 8, - FAU_NUM_PACKET_BUFFERS_TO_FREE, - 0); - cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH, - priv->fau + qos * 4, - MAX_SKB_TO_FREE); - } + /* Save scratch in case userspace is using it */ + CVMX_SYNCIOBDMA; + old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH); + old_scratch2 = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8); + + /* Fetch and increment the number of packets to be freed. */ + cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH + 8, + FAU_NUM_PACKET_BUFFERS_TO_FREE, + 0); + cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH, + priv->fau + qos * 4, + MAX_SKB_TO_FREE); /* * We have space for 6 segment pointers, If there will be more @@ -201,22 +196,11 @@ int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev) if (unlikely(skb_shinfo(skb)->nr_frags > 5)) { if (unlikely(__skb_linearize(skb))) { queue_type = QUEUE_DROP; - if (USE_ASYNC_IOBDMA) { - /* - * Get the number of skbuffs in use - * by the hardware - */ - CVMX_SYNCIOBDMA; - skb_to_free = - cvmx_scratch_read64(CVMX_SCR_SCRATCH); - } else { - /* - * Get the number of skbuffs in use - * by the hardware - */ - skb_to_free = cvmx_fau_fetch_and_add32( - priv->fau + qos * 4, MAX_SKB_TO_FREE); - } + /* Get the number of skbuffs in use by the + * hardware + */ + CVMX_SYNCIOBDMA; + skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH); skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free, priv->fau + qos * 4); @@ -384,18 +368,10 @@ int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev) pko_command.s.ipoffp1 = skb_network_offset(skb) + 1; } - if (USE_ASYNC_IOBDMA) { - /* Get the number of skbuffs in use by the hardware */ - CVMX_SYNCIOBDMA; - skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH); - buffers_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8); - } else { - /* Get the number of skbuffs in use by the hardware */ - skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4, - MAX_SKB_TO_FREE); - buffers_to_free = - cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0); - } + /* Get the number of skbuffs in use by the hardware */ + CVMX_SYNCIOBDMA; + skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH); + buffers_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8); skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free, priv->fau + qos * 4); @@ -413,9 +389,7 @@ int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev) } else { queue_type = QUEUE_HW; } - if (USE_ASYNC_IOBDMA) - cvmx_fau_async_fetch_and_add32( - CVMX_SCR_SCRATCH, FAU_TOTAL_TX_TO_CLEAN, 1); + cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH, FAU_TOTAL_TX_TO_CLEAN, 1); spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags); @@ -485,16 +459,11 @@ int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev) dev_kfree_skb_any(t); } - if (USE_ASYNC_IOBDMA) { - CVMX_SYNCIOBDMA; - total_to_clean = cvmx_scratch_read64(CVMX_SCR_SCRATCH); - /* Restore the scratch area */ - cvmx_scratch_write64(CVMX_SCR_SCRATCH, old_scratch); - cvmx_scratch_write64(CVMX_SCR_SCRATCH + 8, old_scratch2); - } else { - total_to_clean = cvmx_fau_fetch_and_add32( - FAU_TOTAL_TX_TO_CLEAN, 1); - } + CVMX_SYNCIOBDMA; + total_to_clean = cvmx_scratch_read64(CVMX_SCR_SCRATCH); + /* Restore the scratch area */ + cvmx_scratch_write64(CVMX_SCR_SCRATCH, old_scratch); + cvmx_scratch_write64(CVMX_SCR_SCRATCH + 8, old_scratch2); if (total_to_clean & 0x3ff) { /* -- 2.14.3