From 8fe23fbd94af5a4c117fd0eb2f1c3f492f79efe8 Mon Sep 17 00:00:00 2001 From: Dmitry Kravkov Date: Wed, 6 Oct 2010 03:27:41 +0000 Subject: [PATCH] bnx2x: change type of spq_left to atomic The field is now accessed from different contexts. Signed-off-by: Dmitry Kravkov Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/bnx2x/bnx2x.h | 2 +- drivers/net/bnx2x/bnx2x_main.c | 17 +++++++++-------- drivers/net/bnx2x/bnx2x_stats.c | 5 +---- 3 files changed, 11 insertions(+), 13 deletions(-) diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h index d7b24f9e7939..09fb7ff811d8 100644 --- a/drivers/net/bnx2x/bnx2x.h +++ b/drivers/net/bnx2x/bnx2x.h @@ -860,7 +860,7 @@ struct bnx2x { struct eth_spe *spq_prod_bd; struct eth_spe *spq_last_bd; __le16 *dsb_sp_prod; - u16 spq_left; /* serialize spq */ + atomic_t spq_left; /* serialize spq */ /* used to synchronize spq accesses */ spinlock_t spq_lock; diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c index 238e38f051fb..2c04b97f85a9 100644 --- a/drivers/net/bnx2x/bnx2x_main.c +++ b/drivers/net/bnx2x/bnx2x_main.c @@ -1161,8 +1161,8 @@ void bnx2x_sp_event(struct bnx2x_fastpath *fp, break; } - bp->spq_left++; - + smp_mb__before_atomic_inc(); + atomic_inc(&bp->spq_left); /* push the change in fp->state and towards the memory */ smp_wmb(); @@ -2432,7 +2432,7 @@ int bnx2x_sp_post(struct bnx2x *bp, int command, int cid, spin_lock_bh(&bp->spq_lock); - if (!bp->spq_left) { + if (!atomic_read(&bp->spq_left)) { BNX2X_ERR("BUG! SPQ ring full!\n"); spin_unlock_bh(&bp->spq_lock); bnx2x_panic(); @@ -2472,7 +2472,7 @@ int bnx2x_sp_post(struct bnx2x *bp, int command, int cid, * somewhere between the spin_lock and spin_unlock. Thus no * more explict memory barrier is needed. */ - bp->spq_left--; + atomic_dec(&bp->spq_left); DP(BNX2X_MSG_SP/*NETIF_MSG_TIMER*/, "SPQE[%x] (%x:%x) command %d hw_cid %x data (%x:%x) " @@ -2480,7 +2480,7 @@ int bnx2x_sp_post(struct bnx2x *bp, int command, int cid, bp->spq_prod_idx, (u32)U64_HI(bp->spq_mapping), (u32)(U64_LO(bp->spq_mapping) + (void *)bp->spq_prod_bd - (void *)bp->spq), command, - HW_CID(bp, cid), data_hi, data_lo, type, bp->spq_left); + HW_CID(bp, cid), data_hi, data_lo, type, atomic_read(&bp->spq_left)); bnx2x_sp_prod_update(bp); spin_unlock_bh(&bp->spq_lock); @@ -3290,7 +3290,7 @@ static void bnx2x_eq_int(struct bnx2x *bp) sw_prod = bp->eq_prod; DP(BNX2X_MSG_SP, "EQ: hw_cons %u sw_cons %u bp->spq_left %u\n", - hw_cons, sw_cons, bp->spq_left); + hw_cons, sw_cons, atomic_read(&bp->spq_left)); for (; sw_cons != hw_cons; sw_prod = NEXT_EQ_IDX(sw_prod), sw_cons = NEXT_EQ_IDX(sw_cons)) { @@ -3360,7 +3360,8 @@ static void bnx2x_eq_int(struct bnx2x *bp) spqe_cnt++; } /* for */ - bp->spq_left++; + smp_mb__before_atomic_inc(); + atomic_add(spqe_cnt, &bp->spq_left); bp->eq_cons = sw_cons; bp->eq_prod = sw_prod; @@ -3737,8 +3738,8 @@ void bnx2x_update_coalesce(struct bnx2x *bp) static void bnx2x_init_sp_ring(struct bnx2x *bp) { spin_lock_init(&bp->spq_lock); + atomic_set(&bp->spq_left, MAX_SPQ_PENDING); - bp->spq_left = MAX_SPQ_PENDING; bp->spq_prod_idx = 0; bp->dsb_sp_prod = BNX2X_SP_DSB_INDEX; bp->spq_prod_bd = bp->spq; diff --git a/drivers/net/bnx2x/bnx2x_stats.c b/drivers/net/bnx2x/bnx2x_stats.c index c271fc52613d..32b6b1033a3b 100644 --- a/drivers/net/bnx2x/bnx2x_stats.c +++ b/drivers/net/bnx2x/bnx2x_stats.c @@ -166,11 +166,8 @@ static void bnx2x_storm_stats_post(struct bnx2x *bp) rc = bnx2x_sp_post(bp, RAMROD_CMD_ID_COMMON_STAT_QUERY, 0, ((u32 *)&ramrod_data)[1], ((u32 *)&ramrod_data)[0], 1); - if (rc == 0) { - /* stats ramrod has it's own slot on the spq */ - bp->spq_left++; + if (rc == 0) bp->stats_pending = 1; - } spin_unlock_bh(&bp->stats_lock); } -- GitLab