From b356a2e729cec145a648d22ba5686357c009da25 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Thu, 29 Dec 2016 12:13:31 -0500 Subject: [PATCH] bnxt_en: Remove busy poll logic in the driver. Use native NAPI polling instead. The next patch will complete the work by switching to use napi_complete_done() Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 53 +----------- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 99 ----------------------- 2 files changed, 3 insertions(+), 149 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 9608cb49a11c..b53f958ffcb8 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -39,9 +39,6 @@ #include #include #include -#ifdef CONFIG_NET_RX_BUSY_POLL -#include -#endif #include #include #include @@ -1356,11 +1353,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons, rc = -ENOMEM; if (likely(skb)) { skb_record_rx_queue(skb, bnapi->index); - skb_mark_napi_id(skb, &bnapi->napi); - if (bnxt_busy_polling(bnapi)) - netif_receive_skb(skb); - else - napi_gro_receive(&bnapi->napi, skb); + napi_gro_receive(&bnapi->napi, skb); rc = 1; } goto next_rx_no_prod; @@ -1460,11 +1453,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons, } skb_record_rx_queue(skb, bnapi->index); - skb_mark_napi_id(skb, &bnapi->napi); - if (bnxt_busy_polling(bnapi)) - netif_receive_skb(skb); - else - napi_gro_receive(&bnapi->napi, skb); + napi_gro_receive(&bnapi->napi, skb); rc = 1; next_rx: @@ -1782,9 +1771,6 @@ static int bnxt_poll(struct napi_struct *napi, int budget) struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring; int work_done = 0; - if (!bnxt_lock_napi(bnapi)) - return budget; - while (1) { work_done += bnxt_poll_work(bp, bnapi, budget - work_done); @@ -1798,36 +1784,9 @@ static int bnxt_poll(struct napi_struct *napi, int budget) } } mmiowb(); - bnxt_unlock_napi(bnapi); return work_done; } -#ifdef CONFIG_NET_RX_BUSY_POLL -static int bnxt_busy_poll(struct napi_struct *napi) -{ - struct bnxt_napi *bnapi = container_of(napi, struct bnxt_napi, napi); - struct bnxt *bp = bnapi->bp; - struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring; - int rx_work, budget = 4; - - if (atomic_read(&bp->intr_sem) != 0) - return LL_FLUSH_FAILED; - - if (!bp->link_info.link_up) - return LL_FLUSH_FAILED; - - if (!bnxt_lock_poll(bnapi)) - return LL_FLUSH_BUSY; - - rx_work = bnxt_poll_work(bp, bnapi, budget); - - BNXT_CP_DB_REARM(cpr->cp_doorbell, cpr->cp_raw_cons); - - bnxt_unlock_poll(bnapi); - return rx_work; -} -#endif - static void bnxt_free_tx_skbs(struct bnxt *bp) { int i, max_idx; @@ -5094,10 +5053,8 @@ static void bnxt_disable_napi(struct bnxt *bp) if (!bp->bnapi) return; - for (i = 0; i < bp->cp_nr_rings; i++) { + for (i = 0; i < bp->cp_nr_rings; i++) napi_disable(&bp->bnapi[i]->napi); - bnxt_disable_poll(bp->bnapi[i]); - } } static void bnxt_enable_napi(struct bnxt *bp) @@ -5106,7 +5063,6 @@ static void bnxt_enable_napi(struct bnxt *bp) for (i = 0; i < bp->cp_nr_rings; i++) { bp->bnapi[i]->in_reset = false; - bnxt_enable_poll(bp->bnapi[i]); napi_enable(&bp->bnapi[i]->napi); } } @@ -6765,9 +6721,6 @@ static const struct net_device_ops bnxt_netdev_ops = { #endif .ndo_udp_tunnel_add = bnxt_udp_tunnel_add, .ndo_udp_tunnel_del = bnxt_udp_tunnel_del, -#ifdef CONFIG_NET_RX_BUSY_POLL - .ndo_busy_poll = bnxt_busy_poll, -#endif }; static void bnxt_remove_one(struct pci_dev *pdev) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 16defe9ececc..fddc316170b2 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -654,21 +654,9 @@ struct bnxt_napi { struct bnxt_rx_ring_info *rx_ring; struct bnxt_tx_ring_info *tx_ring; -#ifdef CONFIG_NET_RX_BUSY_POLL - atomic_t poll_state; -#endif bool in_reset; }; -#ifdef CONFIG_NET_RX_BUSY_POLL -enum bnxt_poll_state_t { - BNXT_STATE_IDLE = 0, - BNXT_STATE_NAPI, - BNXT_STATE_POLL, - BNXT_STATE_DISABLE, -}; -#endif - struct bnxt_irq { irq_handler_t handler; unsigned int vector; @@ -1141,93 +1129,6 @@ struct bnxt { ((offsetof(struct tx_port_stats, counter) + \ sizeof(struct rx_port_stats) + 512) / 8) -#ifdef CONFIG_NET_RX_BUSY_POLL -static inline void bnxt_enable_poll(struct bnxt_napi *bnapi) -{ - atomic_set(&bnapi->poll_state, BNXT_STATE_IDLE); -} - -/* called from the NAPI poll routine to get ownership of a bnapi */ -static inline bool bnxt_lock_napi(struct bnxt_napi *bnapi) -{ - int rc = atomic_cmpxchg(&bnapi->poll_state, BNXT_STATE_IDLE, - BNXT_STATE_NAPI); - - return rc == BNXT_STATE_IDLE; -} - -static inline void bnxt_unlock_napi(struct bnxt_napi *bnapi) -{ - atomic_set(&bnapi->poll_state, BNXT_STATE_IDLE); -} - -/* called from the busy poll routine to get ownership of a bnapi */ -static inline bool bnxt_lock_poll(struct bnxt_napi *bnapi) -{ - int rc = atomic_cmpxchg(&bnapi->poll_state, BNXT_STATE_IDLE, - BNXT_STATE_POLL); - - return rc == BNXT_STATE_IDLE; -} - -static inline void bnxt_unlock_poll(struct bnxt_napi *bnapi) -{ - atomic_set(&bnapi->poll_state, BNXT_STATE_IDLE); -} - -static inline bool bnxt_busy_polling(struct bnxt_napi *bnapi) -{ - return atomic_read(&bnapi->poll_state) == BNXT_STATE_POLL; -} - -static inline void bnxt_disable_poll(struct bnxt_napi *bnapi) -{ - int old; - - while (1) { - old = atomic_cmpxchg(&bnapi->poll_state, BNXT_STATE_IDLE, - BNXT_STATE_DISABLE); - if (old == BNXT_STATE_IDLE) - break; - usleep_range(500, 5000); - } -} - -#else - -static inline void bnxt_enable_poll(struct bnxt_napi *bnapi) -{ -} - -static inline bool bnxt_lock_napi(struct bnxt_napi *bnapi) -{ - return true; -} - -static inline void bnxt_unlock_napi(struct bnxt_napi *bnapi) -{ -} - -static inline bool bnxt_lock_poll(struct bnxt_napi *bnapi) -{ - return false; -} - -static inline void bnxt_unlock_poll(struct bnxt_napi *bnapi) -{ -} - -static inline bool bnxt_busy_polling(struct bnxt_napi *bnapi) -{ - return false; -} - -static inline void bnxt_disable_poll(struct bnxt_napi *bnapi) -{ -} - -#endif - #define I2C_DEV_ADDR_A0 0xa0 #define I2C_DEV_ADDR_A2 0xa2 #define SFP_EEPROM_SFF_8472_COMP_ADDR 0x5e -- 2.30.2