Staging: sxg: Ethtool framework and Receive code path changes

* Add Ethtool framework to driver
* Makefile changes to fix build redundancy.
* Fix ups to error code paths in receieve buffer allocation as well as receive code path.
* Read MAC address from FLASH/EEPROM

Signed-off-by: LinSysSoft Sahara Team <saharaproj@linsyssoft.com>
Signed-off-by: Christopher Harrer <charrer@alacritech.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

5 files changed, 355 insertions, 9 deletions

diff --git a/drivers/staging/sxg/Makefile b/drivers/staging/sxg/Makefile
index ec48faa7b3e..8e053222c2a 100644
--- a/drivers/staging/sxg/Makefile
+++ b/drivers/staging/sxg/Makefile
@@ -1 +1,3 @@
-obj-$(CONFIG_SXG)	+= sxg.o
+obj-$(CONFIG_SXG)	+= sxg_nic.o
+
+sxg_nic-y := sxg.o sxg_ethtool.o
diff --git a/drivers/staging/sxg/sxg.c b/drivers/staging/sxg/sxg.c
index b23cbc67834..80e84768da1 100644
--- a/drivers/staging/sxg/sxg.c
+++ b/drivers/staging/sxg/sxg.c
@@ -62,13 +62,11 @@
 #include <linux/dma-mapping.h>
 #include <linux/mii.h>
 
-#define SLIC_DUMP_ENABLED		0
 #define SLIC_GET_STATS_ENABLED		0
 #define LINUX_FREES_ADAPTER_RESOURCES	1
 #define SXG_OFFLOAD_IP_CHECKSUM		0
 #define SXG_POWER_MANAGEMENT_ENABLED	0
 #define VPCI				0
-#define DBG				1
 #define ATK_DEBUG			1
 
 #include "sxg_os.h"
@@ -156,8 +154,7 @@ static struct sxgbase_driver sxg_global = {
 static int intagg_delay = 100;
 static u32 dynamic_intagg = 0;
 
-#define DRV_NAME	"sxg"
-#define DRV_VERSION	"1.0.1"
+char sxg_driver_name[] = "sxg";
 #define DRV_AUTHOR	"Alacritech, Inc. Engineering"
 #define DRV_DESCRIPTION							\
 	"Alacritech SLIC Techonology(tm) Non-Accelerated 10Gbe Driver"
@@ -753,7 +750,7 @@ static int sxg_entry_probe(struct pci_dev *pcidev,
 
 	if (sxg_debug > 0 && did_version++ == 0) {
 		printk(KERN_INFO "%s\n", sxg_banner);
-		printk(KERN_INFO "%s\n", DRV_VERSION);
+		printk(KERN_INFO "%s\n", SXG_DRV_VERSION);
 	}
 
 	if (!(err = pci_set_dma_mask(pcidev, DMA_64BIT_MASK))) {
@@ -770,7 +767,7 @@ static int sxg_entry_probe(struct pci_dev *pcidev,
 
 	DBG_ERROR("Call pci_request_regions\n");
 
-	err = pci_request_regions(pcidev, DRV_NAME);
+	err = pci_request_regions(pcidev, sxg_driver_name);
 	if (err) {
 		DBG_ERROR("pci_request_regions FAILED err[%x]\n", err);
 		return err;
@@ -919,6 +916,7 @@ static int sxg_entry_probe(struct pci_dev *pcidev,
 #endif
 #endif
 	netdev->set_multicast_list = sxg_mcast_set_list;
+	SET_ETHTOOL_OPS(netdev, &sxg_nic_ethtool_ops);
 
 	strcpy(netdev->name, "eth%d");
 	/*  strcpy(netdev->name, pci_name(pcidev)); */
@@ -3857,7 +3855,7 @@ static void sxg_complete_descriptor_blocks(struct adapter_t *adapter,
 }
 
 static struct pci_driver sxg_driver = {
-	.name = DRV_NAME,
+	.name = sxg_driver_name,
 	.id_table = sxg_pci_tbl,
 	.probe = sxg_entry_probe,
 	.remove = sxg_entry_remove,
diff --git a/drivers/staging/sxg/sxg.h b/drivers/staging/sxg/sxg.h
index 28e7cd7337c..a00c2dc97a1 100644
--- a/drivers/staging/sxg/sxg.h
+++ b/drivers/staging/sxg/sxg.h
@@ -42,7 +42,12 @@
 #ifndef __SXG_DRIVER_H__
 #define __SXG_DRIVER_H__
 
-#define p_net_device struct net_device *
+#define SLIC_DUMP_ENABLED		0
+
+#define SXG_DRV_NAME	"sxg"		/* TBD: This might be removed eventually */
+#define SXG_DRV_VERSION	"1.0.1"
+
+extern char sxg_driver_name[];
 /*
  * struct sxg_stats - Probably move these to someplace where
  * the slicstat (sxgstat?) program can get them.
@@ -759,4 +764,5 @@ struct slic_crash_info {
 #define SIOCSLICSETINTAGG        (SIOCDEVPRIVATE+10)
 #define SIOCSLICTRACEDUMP        (SIOCDEVPRIVATE+11)
 
+extern struct ethtool_ops sxg_nic_ethtool_ops;
 #endif /*  __SXG_DRIVER_H__ */
diff --git a/drivers/staging/sxg/sxg_ethtool.c b/drivers/staging/sxg/sxg_ethtool.c
new file mode 100644
index 00000000000..c15c250e9ec
--- /dev/null
+++ b/drivers/staging/sxg/sxg_ethtool.c
@@ -0,0 +1,338 @@
+/**************************************************************************
+ *
+ * Copyright (C) 2000-2008 Alacritech, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ALACRITECH, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ALACRITECH, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation
+ * are those of the authors and should not be interpreted as representing
+ * official policies, either expressed or implied, of Alacritech, Inc.
+ *
+ **************************************************************************/
+
+/*
+ * FILENAME: sxg_ethtool.c
+ *
+ * The ethtool support for SXG driver for Alacritech's 10Gbe products.
+ *
+ * NOTE: This is the standard, non-accelerated version of Alacritech's
+ *       IS-NIC driver.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/skbuff.h>
+#include <linux/pci.h>
+
+#include "sxg_os.h"
+#include "sxghw.h"
+#include "sxghif.h"
+#include "sxg.h"
+//#include "sxg.c"
+#include "saharadbgdownload.h"
+
+struct sxg_nic_stats {
+        char stat_string[ETH_GSTRING_LEN];
+        int sizeof_stat;
+        int stat_offset;
+};
+
+#define SXG_NIC_STATS(m) sizeof(((struct adapter_t *)0)->m), \
+				offsetof(struct adapter_t, m)
+
+#define USER_VIEWABLE_EEPROM_SIZE	28
+
+static struct sxg_nic_stats sxg_nic_gstrings_stats[] = {
+	{"xmit_ring_0_full", SXG_NIC_STATS(Stats.XmtZeroFull)},
+
+	/* May be will need in future */
+/*	{"dumb_xmit_broadcast_packets", SXG_NIC_STATS(Stats.DumbXmtBcastPkts)},
+	{"dumb_xmit_broadcast_bytes", SXG_NIC_STATS(Stats.DumbXmtBcastBytes)},
+	{"dumb_xmit_unicast_packets", SXG_NIC_STATS(Stats.DumbXmtUcastPkts)},
+	{"dumb_xmit_unicast_bytes", SXG_NIC_STATS(Stats.DumbXmtUcastBytes)},
+*/
+	{"xmit_queue_length", SXG_NIC_STATS(Stats.XmtQLen)},
+	{"memory_allocation_failure", SXG_NIC_STATS(Stats.NoMem)},
+	{"Interrupts", SXG_NIC_STATS(Stats.NumInts)},
+	{"false_interrupts", SXG_NIC_STATS(Stats.FalseInts)},
+	{"processed_data_queue_full", SXG_NIC_STATS(Stats.PdqFull)},
+	{"event_ring_full", SXG_NIC_STATS(Stats.EventRingFull)},
+	{"transport_checksum_error", SXG_NIC_STATS(Stats.TransportCsum)},
+	{"transport_underflow_error", SXG_NIC_STATS(Stats.TransportUflow)},
+	{"transport_header_length_error", SXG_NIC_STATS(Stats.TransportHdrLen)},
+	{"network_checksum_error", SXG_NIC_STATS(Stats.NetworkCsum)},
+	{"network_underflow_error", SXG_NIC_STATS(Stats.NetworkUflow)},
+	{"network_header_length_error", SXG_NIC_STATS(Stats.NetworkHdrLen)},
+	{"receive_parity_error", SXG_NIC_STATS(Stats.Parity)},
+	{"link_parity_error", SXG_NIC_STATS(Stats.LinkParity)},
+	{"link/data early_error", SXG_NIC_STATS(Stats.LinkEarly)},
+	{"buffer_overflow_error", SXG_NIC_STATS(Stats.LinkBufOflow)},
+	{"link_code_error", SXG_NIC_STATS(Stats.LinkCode)},
+	{"dribble nibble", SXG_NIC_STATS(Stats.LinkDribble)},
+	{"CRC_error", SXG_NIC_STATS(Stats.LinkCrc)},
+	{"link_overflow_error", SXG_NIC_STATS(Stats.LinkOflow)},
+	{"link_underflow_error", SXG_NIC_STATS(Stats.LinkUflow)},
+
+	/* May be need in future */
+/*	{"dumb_rcv_broadcast_packets", SXG_NIC_STATS(Stats.DumbRcvBcastPkts)},
+	{"dumb_rcv_broadcast_bytes", SXG_NIC_STATS(Stats.DumbRcvBcastBytes)},
+	{"dumb_rcv_multicast_packets", SXG_NIC_STATS(Stats.DumbRcvMcastPkts)},
+	{"dumb_rcv_multicast_bytes", SXG_NIC_STATS(Stats.DumbRcvMcastBytes)},
+	{"dumb_rcv_unicast_packets", SXG_NIC_STATS(Stats.DumbRcvUcastPkts)},
+	{"dumb_rcv_unicast_bytes", SXG_NIC_STATS(Stats.DumbRcvUcastBytes)},
+*/
+	{"no_sgl_buffer", SXG_NIC_STATS(Stats.NoSglBuf)},
+};
+
+#define SXG_NIC_STATS_LEN	ARRAY_SIZE(sxg_nic_gstrings_stats)
+
+static inline void sxg_reg32_write(void __iomem *reg, u32 value, bool flush)
+{
+        writel(value, reg);
+        if (flush)
+                mb();
+}
+
+static inline void sxg_reg64_write(struct adapter_t *adapter, void __iomem *reg,
+                                   u64 value, u32 cpu)
+{
+        u32 value_high = (u32) (value >> 32);
+        u32 value_low = (u32) (value & 0x00000000FFFFFFFF);
+        unsigned long flags;
+
+        spin_lock_irqsave(&adapter->Bit64RegLock, flags);
+        writel(value_high, (void __iomem *)(&adapter->UcodeRegs[cpu].Upper));
+        writel(value_low, reg);
+        spin_unlock_irqrestore(&adapter->Bit64RegLock, flags);
+}
+
+static void
+sxg_nic_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo)
+{
+	struct adapter_t *adapter = netdev_priv(dev);
+	strncpy(drvinfo->driver, sxg_driver_name, 32);
+	strncpy(drvinfo->version, SXG_DRV_VERSION, 32);
+	strncpy(drvinfo->fw_version, SAHARA_UCODE_VERS_STRING, 32);
+	strncpy(drvinfo->bus_info, pci_name(adapter->pcidev), 32);
+	/* TODO : Read the major and minor number of firmware. Is this
+ 	 * from the FLASH/EEPROM or download file ?
+ 	 */
+	/* LINSYS : Check if this is correct or if not find the right value
+ 	 * Also check what is the right EEPROM length : EEPROM_SIZE_XFMR or EEPROM_SIZE_NO_XFMR
+ 	 */
+}
+
+static int sxg_nic_set_settings(struct net_device *netdev,
+                              struct ethtool_cmd *ecmd)
+{
+	/* No settings are applicable as we support only 10Gb/FIBRE_media */
+	return -EOPNOTSUPP;
+}
+
+static int
+sxg_nic_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
+{
+	int index;
+
+	switch(stringset) {
+		case ETH_SS_TEST:
+			return -EOPNOTSUPP;
+		break;
+	case ETH_SS_STATS:
+		for (index = 0; index < SXG_NIC_STATS_LEN; index++) {
+                	memcpy(data + index * ETH_GSTRING_LEN,
+                        	sxg_nic_gstrings_stats[index].stat_string,
+                               	ETH_GSTRING_LEN);
+                }
+                break;
+	}
+}
+
+static void
+sxg_nic_get_ethtool_stats(struct net_device *netdev,
+			struct ethtool_stats *stats, u64 * data)
+{
+        struct adapter_t *adapter = netdev_priv(netdev);
+        int index;
+        for (index = 0; index < SXG_NIC_STATS_LEN; index++) {
+                char *p = (char *)adapter +
+				sxg_nic_gstrings_stats[index].stat_offset;
+                data[index] = (sxg_nic_gstrings_stats[index].sizeof_stat ==
+		                     sizeof(u64)) ? *(u64 *) p : *(u32 *) p;
+        }
+}
+
+static int sxg_nic_get_sset_count(struct net_device *netdev, int sset)
+{
+        switch (sset) {
+        case ETH_SS_STATS:
+       		return SXG_NIC_STATS_LEN;
+	default:
+                return -EOPNOTSUPP;
+        }
+}
+
+static int sxg_nic_get_settings(struct net_device *netdev,
+				struct ethtool_cmd *ecmd)
+{
+	struct adapter_t *adapter = netdev_priv(netdev);
+
+        ecmd->supported = SUPPORTED_10000baseT_Full;
+        ecmd->autoneg = AUTONEG_ENABLE;		//VSS check This
+        ecmd->transceiver = XCVR_EXTERNAL;	//VSS check This
+
+	/* For Fibre Channel */
+	ecmd->supported |= SUPPORTED_FIBRE;
+        ecmd->advertising = (ADVERTISED_10000baseT_Full |
+                                ADVERTISED_FIBRE);
+	ecmd->port = PORT_FIBRE;
+
+
+	/* Link Speed */
+	if(adapter->LinkState & SXG_LINK_UP) {
+		ecmd->speed = SPEED_10000;	//adapter->LinkSpeed;
+		ecmd->duplex = DUPLEX_FULL;
+	}
+	return 0;
+}
+
+static int sxg_nic_get_rx_csum(struct net_device *netdev)
+{
+	struct adapter_t *adapter = netdev_priv(netdev);
+	return ((adapter->flags & SXG_RCV_IP_CSUM_ENABLED) ||
+		 (adapter->flags & SXG_RCV_TCP_CSUM_ENABLED));
+}
+
+static int sxg_nic_set_rx_csum(struct net_device *netdev, u32 data)
+{
+	struct adapter_t *adapter = netdev_priv(netdev);
+	if (data)
+		adapter->flags |= SXG_RCV_IP_CSUM_ENABLED;
+	else
+		adapter->flags &= ~SXG_RCV_IP_CSUM_ENABLED;
+
+	/* Reset the card here (call the reset functions .. currently unavailable)*/
+
+	return 0;
+}
+
+static int sxg_nic_get_regs_len(struct net_device *dev)
+{
+	return (SXG_HWREG_MEMSIZE + SXG_UCODEREG_MEMSIZE);
+}
+
+static void sxg_nic_get_regs(struct net_device *netdev,
+			struct ethtool_regs *regs, void *p)
+{
+	struct adapter_t *adapter = netdev_priv(netdev);
+	struct sxg_hw_regs *HwRegs = adapter->HwRegs;
+	struct sxg_ucode_regs *UcodeRegs = adapter->UcodeRegs;
+	u32 *buff = p;
+
+	memset(p, 0, (sizeof(struct sxg_hw_regs)+sizeof(struct sxg_ucode_regs)));
+	memcpy(buff, HwRegs, sizeof(struct sxg_hw_regs));
+	memcpy((buff+sizeof(struct sxg_hw_regs)), UcodeRegs, sizeof(struct sxg_ucode_regs));
+}
+
+static int sxg_nic_get_wol(struct net_device *netdev,
+				struct ethtool_wolinfo *wol)
+{
+	/* We dont support wake-on-lan */
+	return -EOPNOTSUPP;
+}
+
+static int sxg_nic_get_eeprom_len(struct net_device *netdev)
+{
+	return (USER_VIEWABLE_EEPROM_SIZE);
+}
+
+static int sxg_nic_get_eeprom(struct net_device *netdev,
+				struct ethtool_eeprom *eeprom, u8 *bytes)
+{
+	struct adapter_t *adapter = netdev_priv(netdev);
+	struct sw_cfg_data *data;
+	unsigned long           i, status;
+	dma_addr_t p_addr;
+
+	data = pci_alloc_consistent(adapter->pcidev, sizeof(struct sw_cfg_data),
+					 &p_addr);
+	if(!data) {
+                /*
+		 * We cant get even this much memory. Raise a hell
+                 * Get out of here
+                 */
+                printk(KERN_ERR"%s : Could not allocate memory for reading \
+                                EEPROM\n", __FUNCTION__);
+                return -ENOMEM;
+        }
+
+        WRITE_REG(adapter->UcodeRegs[0].ConfigStat, SXG_CFG_TIMEOUT, TRUE);
+        WRITE_REG64(adapter, adapter->UcodeRegs[0].Config, p_addr, 0);
+	for(i=0; i<1000; i++) {
+                READ_REG(adapter->UcodeRegs[0].ConfigStat, status);
+                if (status != SXG_CFG_TIMEOUT)
+                        break;
+                mdelay(1);      /* Do we really need this */
+        }
+
+	memset(bytes, 0, eeprom->len);
+        memcpy(bytes, data->MacAddr[0].MacAddr, sizeof(struct sxg_config_mac));
+        memcpy(bytes+6, data->AtkFru.PartNum, 6);
+        memcpy(bytes+12, data->AtkFru.Revision, 2);
+        memcpy(bytes+14, data->AtkFru.Serial, 14);
+
+	return 0;
+}
+
+struct ethtool_ops sxg_nic_ethtool_ops = {
+	.get_settings = sxg_nic_get_settings,
+	.set_settings = sxg_nic_set_settings,
+	.get_drvinfo = sxg_nic_get_drvinfo,
+	.get_regs_len = sxg_nic_get_regs_len,
+	.get_regs = sxg_nic_get_regs,
+	.get_link = ethtool_op_get_link,
+	.get_wol = sxg_nic_get_wol,
+	.get_eeprom_len = sxg_nic_get_eeprom_len,
+	.get_eeprom = sxg_nic_get_eeprom,
+//	.get_ringparam = sxg_nic_get_ringparam,
+//	.get_pauseparam = sxg_nic_get_pauseparam,
+//	.set_pauseparam = sxg_nic_set_pauseparam,
+	.set_tx_csum = ethtool_op_set_tx_csum,
+	.get_sg = ethtool_op_get_sg,
+	.set_sg = ethtool_op_set_sg,
+//	.get_tso = sxg_nic_get_tso,
+//	.set_tso = sxg_nic_set_tso,
+//	.self_test = sxg_nic_diag_test,
+	.get_strings = sxg_nic_get_strings,
+	.get_ethtool_stats = sxg_nic_get_ethtool_stats,
+	.get_sset_count = sxg_nic_get_sset_count,
+	.get_rx_csum = sxg_nic_get_rx_csum,
+	.set_rx_csum = sxg_nic_set_rx_csum,
+//	.get_coalesce = sxg_nic_get_intr_coalesce,
+//	.set_coalesce = sxg_nic_set_intr_coalesce,
+};
diff --git a/drivers/staging/sxg/sxghif.h b/drivers/staging/sxg/sxghif.h
index b9e6da9b8ba..5a9e2712c89 100644
--- a/drivers/staging/sxg/sxghif.h
+++ b/drivers/staging/sxg/sxghif.h
@@ -9,6 +9,8 @@
  * Alacritech Sahara host interface
  ******************************************************************/
 
+#define DBG				1
+
 /* UCODE Registers */
 struct sxg_ucode_regs {
 	/* Address 0 - 0x3F = Command codes 0-15 for TCB 0.  Excode 0 */