ixgbe: driver for Intel(R) 82598 PCI-Express 10GbE adapters (v4)

This patch adds support for the Intel 82598 PCI-Express 10GbE
chipset. Devices will be available on the market soon.

This version of the driver is largely the same as the last release:

  * Driver uses a single RX and single TX queue, each using 1 MSI-X
  irq vector.
  * Driver runs in NAPI mode only
  * Driver is largely multiqueue-ready (TM)

Changes since 20070803:
  * removed wrappers for hardware functions
  * incorporated e1000e-style HW api reorganization code
  * sparse/checkpatch cleanups, namespace cleanups
  * driver prints out extra debugging information at load time
    identifying adapter board number, mac, phy types
  * removed ixgbe_api.c, ixgbe_api.h, ixgbe_osdep.h
  * driver update to 1.1.18
  * removed ixgbe.txt which contained no useful info anymore

[ Integrated napi_struct changes from Auke as well... -DaveM ]

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 259 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
new file mode 100644
index 00000000000..c160a7d91e2
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -0,0 +1,259 @@
+/*******************************************************************************
+
+  Intel 10 Gigabit PCI Express Linux driver
+  Copyright(c) 1999 - 2007 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  Linux NICS <linux.nics@intel.com>
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#ifndef _IXGBE_H_
+#define _IXGBE_H_
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+
+#include "ixgbe_type.h"
+#include "ixgbe_common.h"
+
+
+#define IXGBE_ERR(args...) printk(KERN_ERR "ixgbe: " args)
+
+#define PFX "ixgbe: "
+#define DPRINTK(nlevel, klevel, fmt, args...) \
+	((void)((NETIF_MSG_##nlevel & adapter->msg_enable) && \
+	printk(KERN_##klevel PFX "%s: %s: " fmt, adapter->netdev->name, \
+		__FUNCTION__ , ## args)))
+
+/* TX/RX descriptor defines */
+#define IXGBE_DEFAULT_TXD		   1024
+#define IXGBE_MAX_TXD			   4096
+#define IXGBE_MIN_TXD			     64
+
+#define IXGBE_DEFAULT_RXD		   1024
+#define IXGBE_MAX_RXD			   4096
+#define IXGBE_MIN_RXD			     64
+
+#define IXGBE_DEFAULT_RXQ			   1
+#define IXGBE_MAX_RXQ				   1
+#define IXGBE_MIN_RXQ				   1
+
+#define IXGBE_DEFAULT_ITR_RX_USECS	    125  /*   8k irqs/sec */
+#define IXGBE_DEFAULT_ITR_TX_USECS	    250  /*   4k irqs/sec */
+#define IXGBE_MIN_ITR_USECS		    100  /* 500k irqs/sec */
+#define IXGBE_MAX_ITR_USECS		  10000  /* 100  irqs/sec */
+
+/* flow control */
+#define IXGBE_DEFAULT_FCRTL		0x10000
+#define IXGBE_MIN_FCRTL			      0
+#define IXGBE_MAX_FCRTL			0x7FF80
+#define IXGBE_DEFAULT_FCRTH		0x20000
+#define IXGBE_MIN_FCRTH			      0
+#define IXGBE_MAX_FCRTH			0x7FFF0
+#define IXGBE_DEFAULT_FCPAUSE		 0x6800  /* may be too long */
+#define IXGBE_MIN_FCPAUSE		      0
+#define IXGBE_MAX_FCPAUSE		 0xFFFF
+
+/* Supported Rx Buffer Sizes */
+#define IXGBE_RXBUFFER_64    64     /* Used for packet split */
+#define IXGBE_RXBUFFER_128   128    /* Used for packet split */
+#define IXGBE_RXBUFFER_256   256    /* Used for packet split */
+#define IXGBE_RXBUFFER_2048  2048
+
+#define IXGBE_RX_HDR_SIZE IXGBE_RXBUFFER_256
+
+#define MAXIMUM_ETHERNET_VLAN_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
+
+/* How many Tx Descriptors do we need to call netif_wake_queue? */
+#define IXGBE_TX_QUEUE_WAKE 16
+
+/* How many Rx Buffers do we bundle into one write to the hardware ? */
+#define IXGBE_RX_BUFFER_WRITE	16	/* Must be power of 2 */
+
+#define IXGBE_TX_FLAGS_CSUM		(u32)(1)
+#define IXGBE_TX_FLAGS_VLAN		(u32)(1 << 1)
+#define IXGBE_TX_FLAGS_TSO		(u32)(1 << 2)
+#define IXGBE_TX_FLAGS_IPV4		(u32)(1 << 3)
+#define IXGBE_TX_FLAGS_VLAN_MASK	0xffff0000
+#define IXGBE_TX_FLAGS_VLAN_SHIFT	16
+
+/* wrapper around a pointer to a socket buffer,
+ * so a DMA handle can be stored along with the buffer */
+struct ixgbe_tx_buffer {
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	unsigned long time_stamp;
+	u16 length;
+	u16 next_to_watch;
+};
+
+struct ixgbe_rx_buffer {
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	struct page *page;
+	dma_addr_t page_dma;
+};
+
+struct ixgbe_queue_stats {
+	u64 packets;
+	u64 bytes;
+};
+
+struct ixgbe_ring {
+	struct ixgbe_adapter *adapter;	/* backlink */
+	void *desc;			/* descriptor ring memory */
+	dma_addr_t dma;			/* phys. address of descriptor ring */
+	unsigned int size;		/* length in bytes */
+	unsigned int count;		/* amount of descriptors */
+	unsigned int next_to_use;
+	unsigned int next_to_clean;
+
+	union {
+		struct ixgbe_tx_buffer *tx_buffer_info;
+		struct ixgbe_rx_buffer *rx_buffer_info;
+	};
+
+	u16 head;
+	u16 tail;
+
+	/* To protect race between sender and clean_tx_irq */
+	spinlock_t tx_lock;
+
+	struct ixgbe_queue_stats stats;
+
+	u32 eims_value;
+	u16 itr_register;
+
+	char name[IFNAMSIZ + 5];
+	u16 work_limit;                /* max work per interrupt */
+};
+
+/* Helper macros to switch between ints/sec and what the register uses.
+ * And yes, it's the same math going both ways.
+ */
+#define EITR_INTS_PER_SEC_TO_REG(_eitr) \
+	((_eitr) ? (1000000000 / ((_eitr) * 256)) : 0)
+#define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
+
+#define IXGBE_DESC_UNUSED(R) \
+	((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
+	(R)->next_to_clean - (R)->next_to_use - 1)
+
+#define IXGBE_RX_DESC_ADV(R, i)	    \
+	(&(((union ixgbe_adv_rx_desc *)((R).desc))[i]))
+#define IXGBE_TX_DESC_ADV(R, i)	    \
+	(&(((union ixgbe_adv_tx_desc *)((R).desc))[i]))
+#define IXGBE_TX_CTXTDESC_ADV(R, i)	    \
+	(&(((struct ixgbe_adv_tx_context_desc *)((R).desc))[i]))
+
+#define IXGBE_MAX_JUMBO_FRAME_SIZE        16128
+
+/* board specific private data structure */
+struct ixgbe_adapter {
+	struct timer_list watchdog_timer;
+	struct vlan_group *vlgrp;
+	u16 bd_number;
+	u16 rx_buf_len;
+	atomic_t irq_sem;
+	struct work_struct reset_task;
+
+	/* TX */
+	struct ixgbe_ring *tx_ring;	/* One per active queue */
+	struct napi_struct napi;
+	u64 restart_queue;
+	u64 lsc_int;
+	u64 hw_tso_ctxt;
+	u64 hw_tso6_ctxt;
+	u32 tx_timeout_count;
+	bool detect_tx_hung;
+
+	/* RX */
+	struct ixgbe_ring *rx_ring;	/* One per active queue */
+	u64 hw_csum_tx_good;
+	u64 hw_csum_rx_error;
+	u64 hw_csum_rx_good;
+	u64 non_eop_descs;
+	int num_tx_queues;
+	int num_rx_queues;
+	struct msix_entry *msix_entries;
+
+	u64 rx_hdr_split;
+	u32 alloc_rx_page_failed;
+	u32 alloc_rx_buff_failed;
+
+	u32 flags;
+#define IXGBE_FLAG_RX_CSUM_ENABLED              (u32)(1)
+#define IXGBE_FLAG_MSI_ENABLED                  (u32)(1 << 1)
+#define IXGBE_FLAG_MSIX_ENABLED			(u32)(1 << 2)
+#define IXGBE_FLAG_RX_PS_ENABLED		(u32)(1 << 3)
+#define IXGBE_FLAG_IN_NETPOLL			(u32)(1 << 4)
+
+	/* Interrupt Throttle Rate */
+	u32 rx_eitr;
+	u32 tx_eitr;
+
+	/* OS defined structs */
+	struct net_device *netdev;
+	struct pci_dev *pdev;
+	struct net_device_stats net_stats;
+
+	/* structs defined in ixgbe_hw.h */
+	struct ixgbe_hw hw;
+	u16 msg_enable;
+	struct ixgbe_hw_stats stats;
+	char lsc_name[IFNAMSIZ + 5];
+
+	unsigned long state;
+	u64 tx_busy;
+};
+
+enum ixbge_state_t {
+	__IXGBE_TESTING,
+	__IXGBE_RESETTING,
+	__IXGBE_DOWN
+};
+
+enum ixgbe_boards {
+	board_82598AF,
+	board_82598EB,
+	board_82598AT,
+};
+
+extern struct ixgbe_info ixgbe_82598AF_info;
+extern struct ixgbe_info ixgbe_82598EB_info;
+extern struct ixgbe_info ixgbe_82598AT_info;
+
+extern char ixgbe_driver_name[];
+extern char ixgbe_driver_version[];
+
+extern int ixgbe_up(struct ixgbe_adapter *adapter);
+extern void ixgbe_down(struct ixgbe_adapter *adapter);
+extern void ixgbe_reset(struct ixgbe_adapter *adapter);
+extern void ixgbe_update_stats(struct ixgbe_adapter *adapter);
+extern void ixgbe_set_ethtool_ops(struct net_device *netdev);
+extern int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
+				    struct ixgbe_ring *rxdr);
+extern int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
+				    struct ixgbe_ring *txdr);
+
+#endif /* _IXGBE_H_ */