diff options
| -rw-r--r-- | drivers/net/qlge/qlge.h | 22 | ||||
| -rw-r--r-- | drivers/net/qlge/qlge_dbg.c | 14 | ||||
| -rw-r--r-- | drivers/net/qlge/qlge_main.c | 12 |
3 files changed, 34 insertions, 14 deletions
diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h index 459663a4023..4cb3647bb1b 100644 --- a/drivers/net/qlge/qlge.h +++ b/drivers/net/qlge/qlge.h @@ -1145,7 +1145,7 @@ struct tx_ring { struct wqicb wqicb; /* structure used to inform chip of new queue */ void *wq_base; /* pci_alloc:virtual addr for tx */ dma_addr_t wq_base_dma; /* pci_alloc:dma addr for tx */ - u32 *cnsmr_idx_sh_reg; /* shadow copy of consumer idx */ + __le32 *cnsmr_idx_sh_reg; /* shadow copy of consumer idx */ dma_addr_t cnsmr_idx_sh_reg_dma; /* dma-shadow copy of consumer */ u32 wq_size; /* size in bytes of queue area */ u32 wq_len; /* number of entries in queue */ @@ -1181,7 +1181,7 @@ struct rx_ring { u32 cq_size; u32 cq_len; u16 cq_id; - volatile __le32 *prod_idx_sh_reg; /* Shadowed producer register. */ + __le32 *prod_idx_sh_reg; /* Shadowed producer register. */ dma_addr_t prod_idx_sh_reg_dma; void __iomem *cnsmr_idx_db_reg; /* PCI doorbell mem area + 0 */ u32 cnsmr_idx; /* current sw idx */ @@ -1459,6 +1459,24 @@ static inline void ql_write_db_reg(u32 val, void __iomem *addr) mmiowb(); } +/* + * Shadow Registers: + * Outbound queues have a consumer index that is maintained by the chip. + * Inbound queues have a producer index that is maintained by the chip. + * For lower overhead, these registers are "shadowed" to host memory + * which allows the device driver to track the queue progress without + * PCI reads. When an entry is placed on an inbound queue, the chip will + * update the relevant index register and then copy the value to the + * shadow register in host memory. + */ +static inline u32 ql_read_sh_reg(__le32 *addr) +{ + u32 reg; + reg = le32_to_cpu(*addr); + rmb(); + return reg; +} + extern char qlge_driver_name[]; extern const char qlge_driver_version[]; extern const struct ethtool_ops qlge_ethtool_ops; diff --git a/drivers/net/qlge/qlge_dbg.c b/drivers/net/qlge/qlge_dbg.c index 3f5e02d2e4a..e705ea5b975 100644 --- a/drivers/net/qlge/qlge_dbg.c +++ b/drivers/net/qlge/qlge_dbg.c @@ -455,10 +455,11 @@ void ql_dump_tx_ring(struct tx_ring *tx_ring) printk(KERN_ERR PFX "tx_ring->base = %p.\n", tx_ring->wq_base); printk(KERN_ERR PFX "tx_ring->base_dma = 0x%llx.\n", (unsigned long long) tx_ring->wq_base_dma); - printk(KERN_ERR PFX "tx_ring->cnsmr_idx_sh_reg = %p.\n", - tx_ring->cnsmr_idx_sh_reg); - printk(KERN_ERR PFX "tx_ring->cnsmr_idx_sh_reg_dma = 0x%llx.\n", - (unsigned long long) tx_ring->cnsmr_idx_sh_reg_dma); + printk(KERN_ERR PFX + "tx_ring->cnsmr_idx_sh_reg, addr = 0x%p, value = %d.\n", + tx_ring->cnsmr_idx_sh_reg, + tx_ring->cnsmr_idx_sh_reg + ? ql_read_sh_reg(tx_ring->cnsmr_idx_sh_reg) : 0); printk(KERN_ERR PFX "tx_ring->size = %d.\n", tx_ring->wq_size); printk(KERN_ERR PFX "tx_ring->len = %d.\n", tx_ring->wq_len); printk(KERN_ERR PFX "tx_ring->prod_idx_db_reg = %p.\n", @@ -558,9 +559,10 @@ void ql_dump_rx_ring(struct rx_ring *rx_ring) printk(KERN_ERR PFX "rx_ring->cq_size = %d.\n", rx_ring->cq_size); printk(KERN_ERR PFX "rx_ring->cq_len = %d.\n", rx_ring->cq_len); printk(KERN_ERR PFX - "rx_ring->prod_idx_sh_reg, addr = %p, value = %d.\n", + "rx_ring->prod_idx_sh_reg, addr = 0x%p, value = %d.\n", rx_ring->prod_idx_sh_reg, - rx_ring->prod_idx_sh_reg ? *(rx_ring->prod_idx_sh_reg) : 0); + rx_ring->prod_idx_sh_reg + ? ql_read_sh_reg(rx_ring->prod_idx_sh_reg) : 0); printk(KERN_ERR PFX "rx_ring->prod_idx_sh_reg_dma = %llx.\n", (unsigned long long) rx_ring->prod_idx_sh_reg_dma); printk(KERN_ERR PFX "rx_ring->cnsmr_idx_db_reg = %p.\n", diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c index b7e40add958..78df7d11cef 100644 --- a/drivers/net/qlge/qlge_main.c +++ b/drivers/net/qlge/qlge_main.c @@ -1545,7 +1545,7 @@ static void ql_process_chip_ae_intr(struct ql_adapter *qdev, static int ql_clean_outbound_rx_ring(struct rx_ring *rx_ring) { struct ql_adapter *qdev = rx_ring->qdev; - u32 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg); + u32 prod = ql_read_sh_reg(rx_ring->prod_idx_sh_reg); struct ob_mac_iocb_rsp *net_rsp = NULL; int count = 0; @@ -1571,7 +1571,7 @@ static int ql_clean_outbound_rx_ring(struct rx_ring *rx_ring) } count++; ql_update_cq(rx_ring); - prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg); + prod = ql_read_sh_reg(rx_ring->prod_idx_sh_reg); } ql_write_cq_idx(rx_ring); if (netif_queue_stopped(qdev->ndev) && net_rsp != NULL) { @@ -1591,7 +1591,7 @@ static int ql_clean_outbound_rx_ring(struct rx_ring *rx_ring) static int ql_clean_inbound_rx_ring(struct rx_ring *rx_ring, int budget) { struct ql_adapter *qdev = rx_ring->qdev; - u32 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg); + u32 prod = ql_read_sh_reg(rx_ring->prod_idx_sh_reg); struct ql_net_rsp_iocb *net_rsp; int count = 0; @@ -1624,7 +1624,7 @@ static int ql_clean_inbound_rx_ring(struct rx_ring *rx_ring, int budget) } count++; ql_update_cq(rx_ring); - prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg); + prod = ql_read_sh_reg(rx_ring->prod_idx_sh_reg); if (count == budget) break; } @@ -1787,7 +1787,7 @@ static irqreturn_t qlge_isr(int irq, void *dev_id) * Check the default queue and wake handler if active. */ rx_ring = &qdev->rx_ring[0]; - if (le32_to_cpu(*rx_ring->prod_idx_sh_reg) != rx_ring->cnsmr_idx) { + if (ql_read_sh_reg(rx_ring->prod_idx_sh_reg) != rx_ring->cnsmr_idx) { QPRINTK(qdev, INTR, INFO, "Waking handler for rx_ring[0].\n"); ql_disable_completion_interrupt(qdev, intr_context->intr); queue_delayed_work_on(smp_processor_id(), qdev->q_workqueue, @@ -1801,7 +1801,7 @@ static irqreturn_t qlge_isr(int irq, void *dev_id) */ for (i = 1; i < qdev->rx_ring_count; i++) { rx_ring = &qdev->rx_ring[i]; - if (le32_to_cpu(*rx_ring->prod_idx_sh_reg) != + if (ql_read_sh_reg(rx_ring->prod_idx_sh_reg) != rx_ring->cnsmr_idx) { QPRINTK(qdev, INTR, INFO, "Waking handler for rx_ring[%d].\n", i); |