drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2013 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #ifndef _IXGBE_FCOE_H
  30 #define _IXGBE_FCOE_H
  31
  32 #include <scsi/fc/fc_fs.h>
  33 #include <scsi/fc/fc_fcoe.h>
  34
  35 /* shift bits within STAT fo FCSTAT */
  36 #define IXGBE_RXDADV_FCSTAT_SHIFT       4
  37
  38 /* ddp user buffer */
  39 #define IXGBE_BUFFCNT_MAX       256     /* 8 bits bufcnt */
  40 #define IXGBE_FCPTR_ALIGN       16
  41 #define IXGBE_FCPTR_MAX (IXGBE_BUFFCNT_MAX * sizeof(dma_addr_t))
  42 #define IXGBE_FCBUFF_4KB        0x0
  43 #define IXGBE_FCBUFF_8KB        0x1
  44 #define IXGBE_FCBUFF_16KB       0x2
  45 #define IXGBE_FCBUFF_64KB       0x3
  46 #define IXGBE_FCBUFF_MAX        65536   /* 64KB max */
  47 #define IXGBE_FCBUFF_MIN        4096    /* 4KB min */
  48 #define IXGBE_FCOE_DDP_MAX      512     /* 9 bits xid */
  49 #define IXGBE_FCOE_DDP_MAX_X550 2048    /* 11 bits xid */
  50
  51 /* Default traffic class to use for FCoE */
  52 #define IXGBE_FCOE_DEFTC        3
  53
  54 /* fcerr */
  55 #define IXGBE_FCERR_BADCRC       0x00100000
  56
  57 /* FCoE DDP for target mode */
  58 #define __IXGBE_FCOE_TARGET     1
  59
  60 struct ixgbe_fcoe_ddp {
  61         int len;
  62         u32 err;
  63         unsigned int sgc;
  64         struct scatterlist *sgl;
  65         dma_addr_t udp;
  66         u64 *udl;
  67         struct dma_pool *pool;
  68 };
  69
  70 /* per cpu variables */
  71 struct ixgbe_fcoe_ddp_pool {
  72         struct dma_pool *pool;
  73         u64 noddp;
  74         u64 noddp_ext_buff;
  75 };
  76
  77 struct ixgbe_fcoe {
  78         struct ixgbe_fcoe_ddp_pool __percpu *ddp_pool;
  79         atomic_t refcnt;
  80         spinlock_t lock;
  81         struct ixgbe_fcoe_ddp ddp[IXGBE_FCOE_DDP_MAX_X550];
  82         void *extra_ddp_buffer;
  83         dma_addr_t extra_ddp_buffer_dma;
  84         unsigned long mode;
  85         u8 up;
  86 };
  87
  88 #endif /* _IXGBE_FCOE_H */