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 000000000000..c160a7d91e21
--- /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_ */