drivers/net/ethernet/intel/ixgbevf/ixgbevf.h

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2012 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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #ifndef _IXGBEVF_H_
  29 #define _IXGBEVF_H_
  30
  31 #include <linux/types.h>
  32 #include <linux/bitops.h>
  33 #include <linux/timer.h>
  34 #include <linux/io.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/if_vlan.h>
  37 #include <linux/u64_stats_sync.h>
  38
  39 #include "vf.h"
  40
  41 /* wrapper around a pointer to a socket buffer,
  42  * so a DMA handle can be stored along with the buffer */
  43 struct ixgbevf_tx_buffer {
  44         struct sk_buff *skb;
  45         dma_addr_t dma;
  46         unsigned long time_stamp;
  47         union ixgbe_adv_tx_desc *next_to_watch;
  48         u16 length;
  49         u16 mapped_as_page;
  50 };
  51
  52 struct ixgbevf_rx_buffer {
  53         struct sk_buff *skb;
  54         dma_addr_t dma;
  55 };
  56
  57 struct ixgbevf_ring {
  58         struct ixgbevf_ring *next;
  59         struct net_device *netdev;
  60         struct device *dev;
  61         void *desc;                     /* descriptor ring memory */
  62         dma_addr_t dma;                 /* phys. address of descriptor ring */
  63         unsigned int size;              /* length in bytes */
  64         unsigned int count;             /* amount of descriptors */
  65         unsigned int next_to_use;
  66         unsigned int next_to_clean;
  67
  68         int queue_index; /* needed for multiqueue queue management */
  69         union {
  70                 struct ixgbevf_tx_buffer *tx_buffer_info;
  71                 struct ixgbevf_rx_buffer *rx_buffer_info;
  72         };
  73
  74         u64                     total_bytes;
  75         u64                     total_packets;
  76         struct u64_stats_sync   syncp;
  77         u64 hw_csum_rx_error;
  78         u64 hw_csum_rx_good;
  79
  80         u16 head;
  81         u16 tail;
  82
  83         u16 reg_idx; /* holds the special value that gets the hardware register
  84                       * offset associated with this ring, which is different
  85                       * for DCB and RSS modes */
  86
  87         u16 rx_buf_len;
  88 };
  89
  90 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  91 #define IXGBEVF_RX_BUFFER_WRITE 16      /* Must be power of 2 */
  92
  93 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
  94 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
  95
  96 #define IXGBEVF_DEFAULT_TXD   1024
  97 #define IXGBEVF_DEFAULT_RXD   512
  98 #define IXGBEVF_MAX_TXD       4096
  99 #define IXGBEVF_MIN_TXD       64
 100 #define IXGBEVF_MAX_RXD       4096
 101 #define IXGBEVF_MIN_RXD       64
 102
 103 /* Supported Rx Buffer Sizes */
 104 #define IXGBEVF_RXBUFFER_256   256    /* Used for packet split */
 105 #define IXGBEVF_RXBUFFER_2K    2048
 106 #define IXGBEVF_RXBUFFER_4K    4096
 107 #define IXGBEVF_RXBUFFER_8K    8192
 108 #define IXGBEVF_RXBUFFER_10K   10240
 109
 110 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
 111
 112 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
 113
 114 #define IXGBE_TX_FLAGS_CSUM             (u32)(1)
 115 #define IXGBE_TX_FLAGS_VLAN             (u32)(1 << 1)
 116 #define IXGBE_TX_FLAGS_TSO              (u32)(1 << 2)
 117 #define IXGBE_TX_FLAGS_IPV4             (u32)(1 << 3)
 118 #define IXGBE_TX_FLAGS_FCOE             (u32)(1 << 4)
 119 #define IXGBE_TX_FLAGS_FSO              (u32)(1 << 5)
 120 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
 121 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK   0x0000e000
 122 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
 123
 124 struct ixgbevf_ring_container {
 125         struct ixgbevf_ring *ring;      /* pointer to linked list of rings */
 126         unsigned int total_bytes;       /* total bytes processed this int */
 127         unsigned int total_packets;     /* total packets processed this int */
 128         u8 count;                       /* total number of rings in vector */
 129         u8 itr;                         /* current ITR setting for ring */
 130 };
 131
 132 /* iterator for handling rings in ring container */
 133 #define ixgbevf_for_each_ring(pos, head) \
 134         for (pos = (head).ring; pos != NULL; pos = pos->next)
 135
 136 /* MAX_MSIX_Q_VECTORS of these are allocated,
 137  * but we only use one per queue-specific vector.
 138  */
 139 struct ixgbevf_q_vector {
 140         struct ixgbevf_adapter *adapter;
 141         u16 v_idx;              /* index of q_vector within array, also used for
 142                                  * finding the bit in EICR and friends that
 143                                  * represents the vector for this ring */
 144         u16 itr;                /* Interrupt throttle rate written to EITR */
 145         struct napi_struct napi;
 146         struct ixgbevf_ring_container rx, tx;
 147         char name[IFNAMSIZ + 9];
 148 };
 149
 150 /*
 151  * microsecond values for various ITR rates shifted by 2 to fit itr register
 152  * with the first 3 bits reserved 0
 153  */
 154 #define IXGBE_MIN_RSC_ITR       24
 155 #define IXGBE_100K_ITR          40
 156 #define IXGBE_20K_ITR           200
 157 #define IXGBE_10K_ITR           400
 158 #define IXGBE_8K_ITR            500
 159
 160 /* Helper macros to switch between ints/sec and what the register uses.
 161  * And yes, it's the same math going both ways.  The lowest value
 162  * supported by all of the ixgbe hardware is 8.
 163  */
 164 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 165         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
 166 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 167
 168 #define IXGBE_DESC_UNUSED(R) \
 169         ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 170         (R)->next_to_clean - (R)->next_to_use - 1)
 171
 172 #define IXGBEVF_RX_DESC(R, i)       \
 173         (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
 174 #define IXGBEVF_TX_DESC(R, i)       \
 175         (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
 176 #define IXGBEVF_TX_CTXTDESC(R, i)           \
 177         (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
 178
 179 #define IXGBE_MAX_JUMBO_FRAME_SIZE      9728 /* Maximum Supported Size 9.5KB */
 180
 181 #define OTHER_VECTOR 1
 182 #define NON_Q_VECTORS (OTHER_VECTOR)
 183
 184 #define MAX_MSIX_Q_VECTORS 2
 185
 186 #define MIN_MSIX_Q_VECTORS 1
 187 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
 188
 189 /* board specific private data structure */
 190 struct ixgbevf_adapter {
 191         struct timer_list watchdog_timer;
 192         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 193         u16 bd_number;
 194         struct work_struct reset_task;
 195         struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
 196
 197         /* Interrupt Throttle Rate */
 198         u16 rx_itr_setting;
 199         u16 tx_itr_setting;
 200
 201         /* interrupt masks */
 202         u32 eims_enable_mask;
 203         u32 eims_other;
 204
 205         /* TX */
 206         struct ixgbevf_ring *tx_ring;   /* One per active queue */
 207         int num_tx_queues;
 208         u64 restart_queue;
 209         u64 hw_csum_tx_good;
 210         u64 lsc_int;
 211         u64 hw_tso_ctxt;
 212         u64 hw_tso6_ctxt;
 213         u32 tx_timeout_count;
 214
 215         /* RX */
 216         struct ixgbevf_ring *rx_ring;   /* One per active queue */
 217         int num_rx_queues;
 218         u64 hw_csum_rx_error;
 219         u64 hw_rx_no_dma_resources;
 220         u64 hw_csum_rx_good;
 221         u64 non_eop_descs;
 222         int num_msix_vectors;
 223         struct msix_entry *msix_entries;
 224
 225         u32 alloc_rx_page_failed;
 226         u32 alloc_rx_buff_failed;
 227
 228         /* Some features need tri-state capability,
 229          * thus the additional *_CAPABLE flags.
 230          */
 231         u32 flags;
 232 #define IXGBE_FLAG_IN_WATCHDOG_TASK             (u32)(1)
 233 #define IXGBE_FLAG_IN_NETPOLL                   (u32)(1 << 1)
 234
 235         /* OS defined structs */
 236         struct net_device *netdev;
 237         struct pci_dev *pdev;
 238
 239         /* structs defined in ixgbe_vf.h */
 240         struct ixgbe_hw hw;
 241         u16 msg_enable;
 242         struct ixgbevf_hw_stats stats;
 243         u64 zero_base;
 244         /* Interrupt Throttle Rate */
 245         u32 eitr_param;
 246
 247         unsigned long state;
 248         u64 tx_busy;
 249         unsigned int tx_ring_count;
 250         unsigned int rx_ring_count;
 251
 252         u32 link_speed;
 253         bool link_up;
 254
 255         struct work_struct watchdog_task;
 256
 257         spinlock_t mbx_lock;
 258 };
 259
 260 enum ixbgevf_state_t {
 261         __IXGBEVF_TESTING,
 262         __IXGBEVF_RESETTING,
 263         __IXGBEVF_DOWN
 264 };
 265
 266 struct ixgbevf_cb {
 267         struct sk_buff *prev;
 268 };
 269 #define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
 270
 271 enum ixgbevf_boards {
 272         board_82599_vf,
 273         board_X540_vf,
 274 };
 275
 276 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
 277 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
 278 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
 279
 280 /* needed by ethtool.c */
 281 extern const char ixgbevf_driver_name[];
 282 extern const char ixgbevf_driver_version[];
 283
 284 extern void ixgbevf_up(struct ixgbevf_adapter *adapter);
 285 extern void ixgbevf_down(struct ixgbevf_adapter *adapter);
 286 extern void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
 287 extern void ixgbevf_reset(struct ixgbevf_adapter *adapter);
 288 extern void ixgbevf_set_ethtool_ops(struct net_device *netdev);
 289 extern int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *,
 290                                       struct ixgbevf_ring *);
 291 extern int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *,
 292                                       struct ixgbevf_ring *);
 293 extern void ixgbevf_free_rx_resources(struct ixgbevf_adapter *,
 294                                       struct ixgbevf_ring *);
 295 extern void ixgbevf_free_tx_resources(struct ixgbevf_adapter *,
 296                                       struct ixgbevf_ring *);
 297 extern void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
 298 extern int ethtool_ioctl(struct ifreq *ifr);
 299
 300 extern void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
 301 extern void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
 302
 303 #ifdef DEBUG
 304 extern char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
 305 #define hw_dbg(hw, format, arg...) \
 306         printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
 307 #else
 308 #define hw_dbg(hw, format, arg...) do {} while (0)
 309 #endif
 310
 311 #endif /* _IXGBEVF_H_ */