diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnx2x/bnx2x.h')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnx2x/bnx2x.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h index f76597e5fa55..edda716fdce4 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h @@ -485,6 +485,21 @@ struct bnx2x_fastpath { struct bnx2x *bp; /* parent */ struct napi_struct napi; + +#ifdef CONFIG_NET_LL_RX_POLL + unsigned int state; +#define BNX2X_FP_STATE_IDLE 0 +#define BNX2X_FP_STATE_NAPI (1 << 0) /* NAPI owns this FP */ +#define BNX2X_FP_STATE_POLL (1 << 1) /* poll owns this FP */ +#define BNX2X_FP_STATE_NAPI_YIELD (1 << 2) /* NAPI yielded this FP */ +#define BNX2X_FP_STATE_POLL_YIELD (1 << 3) /* poll yielded this FP */ +#define BNX2X_FP_YIELD (BNX2X_FP_STATE_NAPI_YIELD | BNX2X_FP_STATE_POLL_YIELD) +#define BNX2X_FP_LOCKED (BNX2X_FP_STATE_NAPI | BNX2X_FP_STATE_POLL) +#define BNX2X_FP_USER_PEND (BNX2X_FP_STATE_POLL | BNX2X_FP_STATE_POLL_YIELD) + /* protect state */ + spinlock_t lock; +#endif /* CONFIG_NET_LL_RX_POLL */ + union host_hc_status_block status_blk; /* chip independent shortcuts into sb structure */ __le16 *sb_index_values; @@ -557,6 +572,116 @@ struct bnx2x_fastpath { #define bnx2x_fp_stats(bp, fp) (&((bp)->fp_stats[(fp)->index])) #define bnx2x_fp_qstats(bp, fp) (&((bp)->fp_stats[(fp)->index].eth_q_stats)) +#ifdef CONFIG_NET_LL_RX_POLL +static inline void bnx2x_fp_init_lock(struct bnx2x_fastpath *fp) +{ + spin_lock_init(&fp->lock); + fp->state = BNX2X_FP_STATE_IDLE; +} + +/* called from the device poll routine to get ownership of a FP */ +static inline bool bnx2x_fp_lock_napi(struct bnx2x_fastpath *fp) +{ + bool rc = true; + + spin_lock(&fp->lock); + if (fp->state & BNX2X_FP_LOCKED) { + WARN_ON(fp->state & BNX2X_FP_STATE_NAPI); + fp->state |= BNX2X_FP_STATE_NAPI_YIELD; + rc = false; + } else { + /* we don't care if someone yielded */ + fp->state = BNX2X_FP_STATE_NAPI; + } + spin_unlock(&fp->lock); + return rc; +} + +/* returns true is someone tried to get the FP while napi had it */ +static inline bool bnx2x_fp_unlock_napi(struct bnx2x_fastpath *fp) +{ + bool rc = false; + + spin_lock(&fp->lock); + WARN_ON(fp->state & + (BNX2X_FP_STATE_POLL | BNX2X_FP_STATE_NAPI_YIELD)); + + if (fp->state & BNX2X_FP_STATE_POLL_YIELD) + rc = true; + fp->state = BNX2X_FP_STATE_IDLE; + spin_unlock(&fp->lock); + return rc; +} + +/* called from bnx2x_low_latency_poll() */ +static inline bool bnx2x_fp_lock_poll(struct bnx2x_fastpath *fp) +{ + bool rc = true; + + spin_lock_bh(&fp->lock); + if ((fp->state & BNX2X_FP_LOCKED)) { + fp->state |= BNX2X_FP_STATE_POLL_YIELD; + rc = false; + } else { + /* preserve yield marks */ + fp->state |= BNX2X_FP_STATE_POLL; + } + spin_unlock_bh(&fp->lock); + return rc; +} + +/* returns true if someone tried to get the FP while it was locked */ +static inline bool bnx2x_fp_unlock_poll(struct bnx2x_fastpath *fp) +{ + bool rc = false; + + spin_lock_bh(&fp->lock); + WARN_ON(fp->state & BNX2X_FP_STATE_NAPI); + + if (fp->state & BNX2X_FP_STATE_POLL_YIELD) + rc = true; + fp->state = BNX2X_FP_STATE_IDLE; + spin_unlock_bh(&fp->lock); + return rc; +} + +/* true if a socket is polling, even if it did not get the lock */ +static inline bool bnx2x_fp_ll_polling(struct bnx2x_fastpath *fp) +{ + WARN_ON(!(fp->state & BNX2X_FP_LOCKED)); + return fp->state & BNX2X_FP_USER_PEND; +} +#else +static inline void bnx2x_fp_init_lock(struct bnx2x_fastpath *fp) +{ +} + +static inline bool bnx2x_fp_lock_napi(struct bnx2x_fastpath *fp) +{ + return true; +} + +static inline bool bnx2x_fp_unlock_napi(struct bnx2x_fastpath *fp) +{ + return false; +} + +static inline bool bnx2x_fp_lock_poll(struct bnx2x_fastpath *fp) +{ + return false; +} + +static inline bool bnx2x_fp_unlock_poll(struct bnx2x_fastpath *fp) +{ + return false; +} + +static inline bool bnx2x_fp_ll_polling(struct bnx2x_fastpath *fp) +{ + return false; +} +#endif /* CONFIG_NET_LL_RX_POLL */ + /* Use 2500 as a mini-jumbo MTU for FCoE */ #define BNX2X_FCOE_MINI_JUMBO_MTU 2500 |