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         u16 length;
  48         u16 next_to_watch;
  49         u16 mapped_as_page;
  50 };
  51
  52 struct ixgbevf_rx_buffer {
  53         struct sk_buff *skb;
  54         dma_addr_t dma;
  55         struct page *page;
  56         dma_addr_t page_dma;
  57         unsigned int page_offset;
  58 };
  59
  60 struct ixgbevf_ring {
  61         struct ixgbevf_adapter *adapter;  /* backlink */
  62         void *desc;                     /* descriptor ring memory */
  63         dma_addr_t dma;                 /* phys. address of descriptor ring */
  64         unsigned int size;              /* length in bytes */
  65         unsigned int count;             /* amount of descriptors */
  66         unsigned int next_to_use;
  67         unsigned int next_to_clean;
  68
  69         int queue_index; /* needed for multiqueue queue management */
  70         union {
  71                 struct ixgbevf_tx_buffer *tx_buffer_info;
  72                 struct ixgbevf_rx_buffer *rx_buffer_info;
  73         };
  74
  75         u64                     total_bytes;
  76         u64                     total_packets;
  77         struct u64_stats_sync   syncp;
  78
  79         u16 head;
  80         u16 tail;
  81
  82         u16 reg_idx; /* holds the special value that gets the hardware register
  83                       * offset associated with this ring, which is different
  84                       * for DCB and RSS modes */
  85
  86 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
  87         /* cpu for tx queue */
  88         int cpu;
  89 #endif
  90
  91         u64 v_idx; /* maps directly to the index for this ring in the hardware
  92                     * vector array, can also be used for finding the bit in EICR
  93                     * and friends that represents the vector for this ring */
  94
  95         u16 work_limit;                /* max work per interrupt */
  96         u16 rx_buf_len;
  97 };
  98
  99 enum ixgbevf_ring_f_enum {
 100         RING_F_NONE = 0,
 101         RING_F_ARRAY_SIZE      /* must be last in enum set */
 102 };
 103
 104 struct ixgbevf_ring_feature {
 105         int indices;
 106         int mask;
 107 };
 108
 109 /* How many Rx Buffers do we bundle into one write to the hardware ? */
 110 #define IXGBEVF_RX_BUFFER_WRITE 16      /* Must be power of 2 */
 111
 112 #define MAX_RX_QUEUES 1
 113 #define MAX_TX_QUEUES 1
 114
 115 #define IXGBEVF_DEFAULT_TXD   1024
 116 #define IXGBEVF_DEFAULT_RXD   512
 117 #define IXGBEVF_MAX_TXD       4096
 118 #define IXGBEVF_MIN_TXD       64
 119 #define IXGBEVF_MAX_RXD       4096
 120 #define IXGBEVF_MIN_RXD       64
 121
 122 /* Supported Rx Buffer Sizes */
 123 #define IXGBEVF_RXBUFFER_64    64     /* Used for packet split */
 124 #define IXGBEVF_RXBUFFER_128   128    /* Used for packet split */
 125 #define IXGBEVF_RXBUFFER_256   256    /* Used for packet split */
 126 #define IXGBEVF_RXBUFFER_2048  2048
 127 #define IXGBEVF_MAX_RXBUFFER   16384  /* largest size for single descriptor */
 128
 129 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
 130
 131 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
 132
 133 #define IXGBE_TX_FLAGS_CSUM             (u32)(1)
 134 #define IXGBE_TX_FLAGS_VLAN             (u32)(1 << 1)
 135 #define IXGBE_TX_FLAGS_TSO              (u32)(1 << 2)
 136 #define IXGBE_TX_FLAGS_IPV4             (u32)(1 << 3)
 137 #define IXGBE_TX_FLAGS_FCOE             (u32)(1 << 4)
 138 #define IXGBE_TX_FLAGS_FSO              (u32)(1 << 5)
 139 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
 140 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK   0x0000e000
 141 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
 142
 143 /* MAX_MSIX_Q_VECTORS of these are allocated,
 144  * but we only use one per queue-specific vector.
 145  */
 146 struct ixgbevf_q_vector {
 147         struct ixgbevf_adapter *adapter;
 148         struct napi_struct napi;
 149         DECLARE_BITMAP(rxr_idx, MAX_RX_QUEUES); /* Rx ring indices */
 150         DECLARE_BITMAP(txr_idx, MAX_TX_QUEUES); /* Tx ring indices */
 151         u8 rxr_count;     /* Rx ring count assigned to this vector */
 152         u8 txr_count;     /* Tx ring count assigned to this vector */
 153         u8 tx_itr;
 154         u8 rx_itr;
 155         u32 eitr;
 156         int v_idx;        /* vector index in list */
 157 };
 158
 159 /* Helper macros to switch between ints/sec and what the register uses.
 160  * And yes, it's the same math going both ways.  The lowest value
 161  * supported by all of the ixgbe hardware is 8.
 162  */
 163 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 164         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
 165 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 166
 167 #define IXGBE_DESC_UNUSED(R) \
 168         ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 169         (R)->next_to_clean - (R)->next_to_use - 1)
 170
 171 #define IXGBE_RX_DESC_ADV(R, i)     \
 172         (&(((union ixgbe_adv_rx_desc *)((R).desc))[i]))
 173 #define IXGBE_TX_DESC_ADV(R, i)     \
 174         (&(((union ixgbe_adv_tx_desc *)((R).desc))[i]))
 175 #define IXGBE_TX_CTXTDESC_ADV(R, i)         \
 176         (&(((struct ixgbe_adv_tx_context_desc *)((R).desc))[i]))
 177
 178 #define IXGBE_MAX_JUMBO_FRAME_SIZE        16128
 179
 180 #define OTHER_VECTOR 1
 181 #define NON_Q_VECTORS (OTHER_VECTOR)
 182
 183 #define MAX_MSIX_Q_VECTORS 2
 184 #define MAX_MSIX_COUNT 2
 185
 186 #define MIN_MSIX_Q_VECTORS 2
 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         char name[MAX_MSIX_COUNT][IFNAMSIZ + 9];
 197
 198         /* Interrupt Throttle Rate */
 199         u32 itr_setting;
 200         u16 eitr_low;
 201         u16 eitr_high;
 202
 203         /* TX */
 204         struct ixgbevf_ring *tx_ring;   /* One per active queue */
 205         int num_tx_queues;
 206         u64 restart_queue;
 207         u64 hw_csum_tx_good;
 208         u64 lsc_int;
 209         u64 hw_tso_ctxt;
 210         u64 hw_tso6_ctxt;
 211         u32 tx_timeout_count;
 212
 213         /* RX */
 214         struct ixgbevf_ring *rx_ring;   /* One per active queue */
 215         int num_rx_queues;
 216         int num_rx_pools;               /* == num_rx_queues in 82598 */
 217         int num_rx_queues_per_pool;     /* 1 if 82598, can be many if 82599 */
 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         int max_msix_q_vectors;         /* true count of q_vectors for device */
 224         struct ixgbevf_ring_feature ring_feature[RING_F_ARRAY_SIZE];
 225         struct msix_entry *msix_entries;
 226
 227         u64 rx_hdr_split;
 228         u32 alloc_rx_page_failed;
 229         u32 alloc_rx_buff_failed;
 230
 231         /* Some features need tri-state capability,
 232          * thus the additional *_CAPABLE flags.
 233          */
 234         u32 flags;
 235 #define IXGBE_FLAG_RX_CSUM_ENABLED              (u32)(1)
 236 #define IXGBE_FLAG_RX_1BUF_CAPABLE              (u32)(1 << 1)
 237 #define IXGBE_FLAG_RX_PS_CAPABLE                (u32)(1 << 2)
 238 #define IXGBE_FLAG_RX_PS_ENABLED                (u32)(1 << 3)
 239 #define IXGBE_FLAG_IN_NETPOLL                   (u32)(1 << 4)
 240 #define IXGBE_FLAG_IMIR_ENABLED                 (u32)(1 << 5)
 241 #define IXGBE_FLAG_MQ_CAPABLE                   (u32)(1 << 6)
 242 #define IXGBE_FLAG_NEED_LINK_UPDATE             (u32)(1 << 7)
 243 #define IXGBE_FLAG_IN_WATCHDOG_TASK             (u32)(1 << 8)
 244         /* OS defined structs */
 245         struct net_device *netdev;
 246         struct pci_dev *pdev;
 247
 248         /* structs defined in ixgbe_vf.h */
 249         struct ixgbe_hw hw;
 250         u16 msg_enable;
 251         struct ixgbevf_hw_stats stats;
 252         u64 zero_base;
 253         /* Interrupt Throttle Rate */
 254         u32 eitr_param;
 255
 256         unsigned long state;
 257         u32 *config_space;
 258         u64 tx_busy;
 259         unsigned int tx_ring_count;
 260         unsigned int rx_ring_count;
 261
 262         u32 link_speed;
 263         bool link_up;
 264         unsigned long link_check_timeout;
 265
 266         struct work_struct watchdog_task;
 267         bool netdev_registered;
 268         bool dev_closed;
 269 };
 270
 271 enum ixbgevf_state_t {
 272         __IXGBEVF_TESTING,
 273         __IXGBEVF_RESETTING,
 274         __IXGBEVF_DOWN
 275 };
 276
 277 enum ixgbevf_boards {
 278         board_82599_vf,
 279         board_X540_vf,
 280 };
 281
 282 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
 283 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
 284 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
 285
 286 /* needed by ethtool.c */
 287 extern const char ixgbevf_driver_name[];
 288 extern const char ixgbevf_driver_version[];
 289
 290 extern int ixgbevf_up(struct ixgbevf_adapter *adapter);
 291 extern void ixgbevf_down(struct ixgbevf_adapter *adapter);
 292 extern void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
 293 extern void ixgbevf_reset(struct ixgbevf_adapter *adapter);
 294 extern void ixgbevf_set_ethtool_ops(struct net_device *netdev);
 295 extern int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *,
 296                                       struct ixgbevf_ring *);
 297 extern int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *,
 298                                       struct ixgbevf_ring *);
 299 extern void ixgbevf_free_rx_resources(struct ixgbevf_adapter *,
 300                                       struct ixgbevf_ring *);
 301 extern void ixgbevf_free_tx_resources(struct ixgbevf_adapter *,
 302                                       struct ixgbevf_ring *);
 303 extern void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
 304
 305 #ifdef ETHTOOL_OPS_COMPAT
 306 extern int ethtool_ioctl(struct ifreq *ifr);
 307
 308 #endif
 309 extern void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
 310 extern void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
 311
 312 #ifdef DEBUG
 313 extern char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
 314 #define hw_dbg(hw, format, arg...) \
 315         printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
 316 #else
 317 #define hw_dbg(hw, format, arg...) do {} while (0)
 318 #endif
 319
 320 #endif /* _IXGBEVF_H_ */