1 files changed, 80 insertions, 78 deletions

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index e1fe3a0a7b0b..4a4e38be80a8 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -370,38 +370,50 @@ static const u64 fix_mac[] = {
         END_SIGN
 };
 
+MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+
 /* Module Loadable parameters. */
-static unsigned int tx_fifo_num = 1;
-static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
-    {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
-static unsigned int rx_ring_num = 1;
-static unsigned int rx_ring_sz[MAX_RX_RINGS] =
-    {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
-static unsigned int rts_frm_len[MAX_RX_RINGS] =
-    {[0 ...(MAX_RX_RINGS - 1)] = 0 };
-static unsigned int rx_ring_mode = 1;
-static unsigned int use_continuous_tx_intrs = 1;
-static unsigned int rmac_pause_time = 0x100;
-static unsigned int mc_pause_threshold_q0q3 = 187;
-static unsigned int mc_pause_threshold_q4q7 = 187;
-static unsigned int shared_splits;
-static unsigned int tmac_util_period = 5;
-static unsigned int rmac_util_period = 5;
-static unsigned int bimodal = 0;
-static unsigned int l3l4hdr_size = 128;
-#ifndef CONFIG_S2IO_NAPI
-static unsigned int indicate_max_pkts;
-#endif
+S2IO_PARM_INT(tx_fifo_num, 1);
+S2IO_PARM_INT(rx_ring_num, 1);
+
+
+S2IO_PARM_INT(rx_ring_mode, 1);
+S2IO_PARM_INT(use_continuous_tx_intrs, 1);
+S2IO_PARM_INT(rmac_pause_time, 0x100);
+S2IO_PARM_INT(mc_pause_threshold_q0q3, 187);
+S2IO_PARM_INT(mc_pause_threshold_q4q7, 187);
+S2IO_PARM_INT(shared_splits, 0);
+S2IO_PARM_INT(tmac_util_period, 5);
+S2IO_PARM_INT(rmac_util_period, 5);
+S2IO_PARM_INT(bimodal, 0);
+S2IO_PARM_INT(l3l4hdr_size, 128);
 /* Frequency of Rx desc syncs expressed as power of 2 */
-static unsigned int rxsync_frequency = 3;
+S2IO_PARM_INT(rxsync_frequency, 3);
 /* Interrupt type. Values can be 0(INTA), 1(MSI), 2(MSI_X) */
-static unsigned int intr_type = 0;
+S2IO_PARM_INT(intr_type, 0);
 /* Large receive offload feature */
-static unsigned int lro = 0;
+S2IO_PARM_INT(lro, 0);
 /* Max pkts to be aggregated by LRO at one time. If not specified,
  * aggregation happens until we hit max IP pkt size(64K)
  */
-static unsigned int lro_max_pkts = 0xFFFF;
+S2IO_PARM_INT(lro_max_pkts, 0xFFFF);
+#ifndef CONFIG_S2IO_NAPI
+S2IO_PARM_INT(indicate_max_pkts, 0);
+#endif
+
+static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
+    {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
+static unsigned int rx_ring_sz[MAX_RX_RINGS] =
+    {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
+static unsigned int rts_frm_len[MAX_RX_RINGS] =
+    {[0 ...(MAX_RX_RINGS - 1)] = 0 };
+
+module_param_array(tx_fifo_len, uint, NULL, 0);
+module_param_array(rx_ring_sz, uint, NULL, 0);
+module_param_array(rts_frm_len, uint, NULL, 0);
 
 /*
  * S2IO device table.
@@ -464,10 +476,9 @@ static int init_shared_mem(struct s2io_nic *nic)
                 size += config->tx_cfg[i].fifo_len;
         }
         if (size > MAX_AVAILABLE_TXDS) {
-                DBG_PRINT(ERR_DBG, "%s: Requested TxDs too high, ",
-                          __FUNCTION__);
+                DBG_PRINT(ERR_DBG, "s2io: Requested TxDs too high, ");
                 DBG_PRINT(ERR_DBG, "Requested: %d, max supported: 8192\n", size);
-                return FAILURE;
+                return -EINVAL;
         }
 
         lst_size = (sizeof(TxD_t) * config->max_txds);
@@ -547,6 +558,7 @@ static int init_shared_mem(struct s2io_nic *nic)
         nic->ufo_in_band_v = kmalloc((sizeof(u64) * size), GFP_KERNEL);
         if (!nic->ufo_in_band_v)
                 return -ENOMEM;
+        memset(nic->ufo_in_band_v, 0, size);
 
         /* Allocation and initialization of RXDs in Rings */
         size = 0;
@@ -1213,7 +1225,7 @@ static int init_nic(struct s2io_nic *nic)
                 break;
         }
 
-        /* Enable Tx FIFO partition 0. */
+        /* Enable all configured Tx FIFO partitions */
         val64 = readq(&bar0->tx_fifo_partition_0);
         val64 |= (TX_FIFO_PARTITION_EN);
         writeq(val64, &bar0->tx_fifo_partition_0);
@@ -1650,7 +1662,7 @@ static void en_dis_able_nic_intrs(struct s2io_nic *nic, u16 mask, int flag)
                         writeq(temp64, &bar0->general_int_mask);
                         /*
                          * If Hercules adapter enable GPIO otherwise
-                         * disabled all PCIX, Flash, MDIO, IIC and GPIO
+                         * disable all PCIX, Flash, MDIO, IIC and GPIO
                          * interrupts for now.
                          * TODO
                          */
@@ -2119,7 +2131,7 @@ static struct sk_buff *s2io_txdl_getskb(fifo_info_t *fifo_data, TxD_t *txdlp, in
                                        frag->size, PCI_DMA_TODEVICE);
                 }
         }
-        txdlp->Host_Control = 0;
+        memset(txdlp,0, (sizeof(TxD_t) * fifo_data->max_txds));
         return(skb);
 }
 
@@ -2614,23 +2626,23 @@ no_rx:
 }
 #endif
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
 /**
- * s2io_netpoll - Rx interrupt service handler for netpoll support
+ * s2io_netpoll - netpoll event handler entry point
  * @dev : pointer to the device structure.
  * Description:
- * Polling 'interrupt' - used by things like netconsole to send skbs
- * without having to re-enable interrupts. It's not called while
- * the interrupt routine is executing.
+ *      This function will be called by upper layer to check for events on the
+ * interface in situations where interrupts are disabled. It is used for
+ * specific in-kernel networking tasks, such as remote consoles and kernel
+ * debugging over the network (example netdump in RedHat).
  */
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
 static void s2io_netpoll(struct net_device *dev)
 {
         nic_t *nic = dev->priv;
         mac_info_t *mac_control;
         struct config_param *config;
         XENA_dev_config_t __iomem *bar0 = nic->bar0;
-        u64 val64;
+        u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
         int i;
 
         disable_irq(dev->irq);
@@ -2639,9 +2651,17 @@ static void s2io_netpoll(struct net_device *dev)
         mac_control = &nic->mac_control;
         config = &nic->config;
 
-        val64 = readq(&bar0->rx_traffic_int);
         writeq(val64, &bar0->rx_traffic_int);
+        writeq(val64, &bar0->tx_traffic_int);
+
+        /* we need to free up the transmitted skbufs or else netpoll will 
+         * run out of skbs and will fail and eventually netpoll application such
+         * as netdump will fail.
+         */
+        for (i = 0; i < config->tx_fifo_num; i++)
+                tx_intr_handler(&mac_control->fifos[i]);
 
+        /* check for received packet and indicate up to network */
         for (i = 0; i < config->rx_ring_num; i++)
                 rx_intr_handler(&mac_control->rings[i]);
 
@@ -3327,7 +3347,7 @@ static void s2io_reset(nic_t * sp)
 
         /* Clear certain PCI/PCI-X fields after reset */
         if (sp->device_type == XFRAME_II_DEVICE) {
-                /* Clear parity err detect bit */
+                /* Clear "detected parity error" bit */
                 pci_write_config_word(sp->pdev, PCI_STATUS, 0x8000);
 
                 /* Clearing PCIX Ecc status register */
@@ -4942,7 +4962,8 @@ static int write_eeprom(nic_t * sp, int off, u64 data, int cnt)
 }
 static void s2io_vpd_read(nic_t *nic)
 {
-        u8 vpd_data[256],data;
+        u8 *vpd_data;
+        u8 data;
         int i=0, cnt, fail = 0;
         int vpd_addr = 0x80;
 
@@ -4955,6 +4976,10 @@ static void s2io_vpd_read(nic_t *nic)
                 vpd_addr = 0x50;
         }
 
+        vpd_data = kmalloc(256, GFP_KERNEL);
+        if (!vpd_data)
+                return;
+
         for (i = 0; i < 256; i +=4 ) {
                 pci_write_config_byte(nic->pdev, (vpd_addr + 2), i);
                 pci_read_config_byte(nic->pdev,  (vpd_addr + 2), &data);
@@ -4977,6 +5002,7 @@ static void s2io_vpd_read(nic_t *nic)
                 memset(nic->product_name, 0, vpd_data[1]);
                 memcpy(nic->product_name, &vpd_data[3], vpd_data[1]);
         }
+        kfree(vpd_data);
 }
 
 /**
@@ -5295,7 +5321,7 @@ static int s2io_link_test(nic_t * sp, uint64_t * data)
         else
                 *data = 0;
 
-        return 0;
+        return *data;
 }
 
 /**
@@ -6337,7 +6363,7 @@ static int s2io_card_up(nic_t * sp)
         s2io_set_multicast(dev);
 
         if (sp->lro) {
-                /* Initialize max aggregatable pkts based on MTU */
+                /* Initialize max aggregatable pkts per session based on MTU */
                 sp->lro_max_aggr_per_sess = ((1<<16) - 1) / dev->mtu;
                 /* Check if we can use(if specified) user provided value */
                 if (lro_max_pkts < sp->lro_max_aggr_per_sess)
@@ -6438,7 +6464,7 @@ static void s2io_tx_watchdog(struct net_device *dev)
  *   @cksum : FCS checksum of the frame.
  *   @ring_no : the ring from which this RxD was extracted.
  *   Description:
- *   This function is called by the Tx interrupt serivce routine to perform
+ *   This function is called by the Rx interrupt serivce routine to perform
  *   some OS related operations on the SKB before passing it to the upper
  *   layers. It mainly checks if the checksum is OK, if so adds it to the
  *   SKBs cksum variable, increments the Rx packet count and passes the SKB
@@ -6698,33 +6724,6 @@ static void s2io_init_pci(nic_t * sp)
         pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
 }
 
-MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_VERSION);
-
-module_param(tx_fifo_num, int, 0);
-module_param(rx_ring_num, int, 0);
-module_param(rx_ring_mode, int, 0);
-module_param_array(tx_fifo_len, uint, NULL, 0);
-module_param_array(rx_ring_sz, uint, NULL, 0);
-module_param_array(rts_frm_len, uint, NULL, 0);
-module_param(use_continuous_tx_intrs, int, 1);
-module_param(rmac_pause_time, int, 0);
-module_param(mc_pause_threshold_q0q3, int, 0);
-module_param(mc_pause_threshold_q4q7, int, 0);
-module_param(shared_splits, int, 0);
-module_param(tmac_util_period, int, 0);
-module_param(rmac_util_period, int, 0);
-module_param(bimodal, bool, 0);
-module_param(l3l4hdr_size, int , 0);
-#ifndef CONFIG_S2IO_NAPI
-module_param(indicate_max_pkts, int, 0);
-#endif
-module_param(rxsync_frequency, int, 0);
-module_param(intr_type, int, 0);
-module_param(lro, int, 0);
-module_param(lro_max_pkts, int, 0);
-
 static int s2io_verify_parm(struct pci_dev *pdev, u8 *dev_intr_type)
 {
         if ( tx_fifo_num > 8) {
@@ -6832,8 +6831,8 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
         }
         if (dev_intr_type != MSI_X) {
                 if (pci_request_regions(pdev, s2io_driver_name)) {
-                        DBG_PRINT(ERR_DBG, "Request Regions failed\n"),
-                            pci_disable_device(pdev);
+                        DBG_PRINT(ERR_DBG, "Request Regions failed\n");
+                        pci_disable_device(pdev);
                         return -ENODEV;
                 }
         }
@@ -6957,7 +6956,7 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
         /*  initialize the shared memory used by the NIC and the host */
         if (init_shared_mem(sp)) {
                 DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n",
-                          __FUNCTION__);
+                          dev->name);
                 ret = -ENOMEM;
                 goto mem_alloc_failed;
         }
@@ -7094,6 +7093,9 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
         dev->addr_len = ETH_ALEN;
         memcpy(dev->dev_addr, sp->def_mac_addr, ETH_ALEN);
 
+        /* reset Nic and bring it to known state */
+        s2io_reset(sp);
+
         /*
          * Initialize the tasklet status and link state flags
          * and the card state parameter
@@ -7131,11 +7133,11 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
                 goto register_failed;
         }
         s2io_vpd_read(sp);
-        DBG_PRINT(ERR_DBG, "%s: Neterion %s",dev->name, sp->product_name);
-        DBG_PRINT(ERR_DBG, "(rev %d), Driver version %s\n",
-                                get_xena_rev_id(sp->pdev),
-                                s2io_driver_version);
         DBG_PRINT(ERR_DBG, "Copyright(c) 2002-2005 Neterion Inc.\n");
+        DBG_PRINT(ERR_DBG, "%s: Neterion %s (rev %d)\n",dev->name,
+                  sp->product_name, get_xena_rev_id(sp->pdev));
+        DBG_PRINT(ERR_DBG, "%s: Driver version %s\n", dev->name,
+                  s2io_driver_version);
         DBG_PRINT(ERR_DBG, "%s: MAC ADDR: "
                           "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
                           sp->def_mac_addr[0].mac_addr[0],