drivers/net/mv643xx_eth.h

   1 #ifndef __MV643XX_ETH_H__
   2 #define __MV643XX_ETH_H__
   3
   4 #include <linux/module.h>
   5 #include <linux/kernel.h>
   6 #include <linux/spinlock.h>
   7 #include <linux/workqueue.h>
   8 #include <linux/mii.h>
   9
  10 #include <linux/mv643xx.h>
  11
  12 #include <asm/dma-mapping.h>
  13
  14 /* Checksum offload for Tx works for most packets, but
  15  * fails if previous packet sent did not use hw csum
  16  */
  17 #define MV643XX_CHECKSUM_OFFLOAD_TX
  18 #define MV643XX_NAPI
  19 #define MV643XX_TX_FAST_REFILL
  20 #undef  MV643XX_COAL
  21
  22 /*
  23  * Number of RX / TX descriptors on RX / TX rings.
  24  * Note that allocating RX descriptors is done by allocating the RX
  25  * ring AND a preallocated RX buffers (skb's) for each descriptor.
  26  * The TX descriptors only allocates the TX descriptors ring,
  27  * with no pre allocated TX buffers (skb's are allocated by higher layers.
  28  */
  29
  30 /* Default TX ring size is 1000 descriptors */
  31 #define MV643XX_DEFAULT_TX_QUEUE_SIZE 1000
  32
  33 /* Default RX ring size is 400 descriptors */
  34 #define MV643XX_DEFAULT_RX_QUEUE_SIZE 400
  35
  36 #define MV643XX_TX_COAL 100
  37 #ifdef MV643XX_COAL
  38 #define MV643XX_RX_COAL 100
  39 #endif
  40
  41 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
  42 #define MAX_DESCS_PER_SKB       (MAX_SKB_FRAGS + 1)
  43 #else
  44 #define MAX_DESCS_PER_SKB       1
  45 #endif
  46
  47 #define ETH_VLAN_HLEN           4
  48 #define ETH_FCS_LEN             4
  49 #define ETH_HW_IP_ALIGN         2               /* hw aligns IP header */
  50 #define ETH_WRAPPER_LEN         (ETH_HW_IP_ALIGN + ETH_HLEN + \
  51                                         ETH_VLAN_HLEN + ETH_FCS_LEN)
  52 #define ETH_RX_SKB_SIZE         (dev->mtu + ETH_WRAPPER_LEN + dma_get_cache_alignment())
  53
  54 #define ETH_RX_QUEUES_ENABLED   (1 << 0)        /* use only Q0 for receive */
  55 #define ETH_TX_QUEUES_ENABLED   (1 << 0)        /* use only Q0 for transmit */
  56
  57 #define ETH_INT_CAUSE_RX_DONE   (ETH_RX_QUEUES_ENABLED << 2)
  58 #define ETH_INT_CAUSE_RX_ERROR  (ETH_RX_QUEUES_ENABLED << 9)
  59 #define ETH_INT_CAUSE_RX        (ETH_INT_CAUSE_RX_DONE | ETH_INT_CAUSE_RX_ERROR)
  60 #define ETH_INT_CAUSE_EXT       0x00000002
  61 #define ETH_INT_UNMASK_ALL      (ETH_INT_CAUSE_RX | ETH_INT_CAUSE_EXT)
  62
  63 #define ETH_INT_CAUSE_TX_DONE   (ETH_TX_QUEUES_ENABLED << 0)
  64 #define ETH_INT_CAUSE_TX_ERROR  (ETH_TX_QUEUES_ENABLED << 8)
  65 #define ETH_INT_CAUSE_TX        (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
  66 #define ETH_INT_CAUSE_PHY       0x00010000
  67 #define ETH_INT_CAUSE_STATE     0x00100000
  68 #define ETH_INT_UNMASK_ALL_EXT  (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY | \
  69                                         ETH_INT_CAUSE_STATE)
  70
  71 #define ETH_INT_MASK_ALL        0x00000000
  72 #define ETH_INT_MASK_ALL_EXT    0x00000000
  73
  74 #define PHY_WAIT_ITERATIONS     1000    /* 1000 iterations * 10uS = 10mS max */
  75 #define PHY_WAIT_MICRO_SECONDS  10
  76
  77 /* Buffer offset from buffer pointer */
  78 #define RX_BUF_OFFSET                           0x2
  79
  80 /* Gigabit Ethernet Unit Global Registers */
  81
  82 /* MIB Counters register definitions */
  83 #define ETH_MIB_GOOD_OCTETS_RECEIVED_LOW        0x0
  84 #define ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH       0x4
  85 #define ETH_MIB_BAD_OCTETS_RECEIVED             0x8
  86 #define ETH_MIB_INTERNAL_MAC_TRANSMIT_ERR       0xc
  87 #define ETH_MIB_GOOD_FRAMES_RECEIVED            0x10
  88 #define ETH_MIB_BAD_FRAMES_RECEIVED             0x14
  89 #define ETH_MIB_BROADCAST_FRAMES_RECEIVED       0x18
  90 #define ETH_MIB_MULTICAST_FRAMES_RECEIVED       0x1c
  91 #define ETH_MIB_FRAMES_64_OCTETS                0x20
  92 #define ETH_MIB_FRAMES_65_TO_127_OCTETS         0x24
  93 #define ETH_MIB_FRAMES_128_TO_255_OCTETS        0x28
  94 #define ETH_MIB_FRAMES_256_TO_511_OCTETS        0x2c
  95 #define ETH_MIB_FRAMES_512_TO_1023_OCTETS       0x30
  96 #define ETH_MIB_FRAMES_1024_TO_MAX_OCTETS       0x34
  97 #define ETH_MIB_GOOD_OCTETS_SENT_LOW            0x38
  98 #define ETH_MIB_GOOD_OCTETS_SENT_HIGH           0x3c
  99 #define ETH_MIB_GOOD_FRAMES_SENT                0x40
 100 #define ETH_MIB_EXCESSIVE_COLLISION             0x44
 101 #define ETH_MIB_MULTICAST_FRAMES_SENT           0x48
 102 #define ETH_MIB_BROADCAST_FRAMES_SENT           0x4c
 103 #define ETH_MIB_UNREC_MAC_CONTROL_RECEIVED      0x50
 104 #define ETH_MIB_FC_SENT                         0x54
 105 #define ETH_MIB_GOOD_FC_RECEIVED                0x58
 106 #define ETH_MIB_BAD_FC_RECEIVED                 0x5c
 107 #define ETH_MIB_UNDERSIZE_RECEIVED              0x60
 108 #define ETH_MIB_FRAGMENTS_RECEIVED              0x64
 109 #define ETH_MIB_OVERSIZE_RECEIVED               0x68
 110 #define ETH_MIB_JABBER_RECEIVED                 0x6c
 111 #define ETH_MIB_MAC_RECEIVE_ERROR               0x70
 112 #define ETH_MIB_BAD_CRC_EVENT                   0x74
 113 #define ETH_MIB_COLLISION                       0x78
 114 #define ETH_MIB_LATE_COLLISION                  0x7c
 115
 116 /* Port serial status reg (PSR) */
 117 #define ETH_INTERFACE_PCM                       0x00000001
 118 #define ETH_LINK_IS_UP                          0x00000002
 119 #define ETH_PORT_AT_FULL_DUPLEX                 0x00000004
 120 #define ETH_RX_FLOW_CTRL_ENABLED                0x00000008
 121 #define ETH_GMII_SPEED_1000                     0x00000010
 122 #define ETH_MII_SPEED_100                       0x00000020
 123 #define ETH_TX_IN_PROGRESS                      0x00000080
 124 #define ETH_BYPASS_ACTIVE                       0x00000100
 125 #define ETH_PORT_AT_PARTITION_STATE             0x00000200
 126 #define ETH_PORT_TX_FIFO_EMPTY                  0x00000400
 127
 128 /* SMI reg */
 129 #define ETH_SMI_BUSY            0x10000000      /* 0 - Write, 1 - Read  */
 130 #define ETH_SMI_READ_VALID      0x08000000      /* 0 - Write, 1 - Read  */
 131 #define ETH_SMI_OPCODE_WRITE    0               /* Completion of Read   */
 132 #define ETH_SMI_OPCODE_READ     0x04000000      /* Operation is in progress */
 133
 134 /* Interrupt Cause Register Bit Definitions */
 135
 136 /* SDMA command status fields macros */
 137
 138 /* Tx & Rx descriptors status */
 139 #define ETH_ERROR_SUMMARY                       0x00000001
 140
 141 /* Tx & Rx descriptors command */
 142 #define ETH_BUFFER_OWNED_BY_DMA                 0x80000000
 143
 144 /* Tx descriptors status */
 145 #define ETH_LC_ERROR                            0
 146 #define ETH_UR_ERROR                            0x00000002
 147 #define ETH_RL_ERROR                            0x00000004
 148 #define ETH_LLC_SNAP_FORMAT                     0x00000200
 149
 150 /* Rx descriptors status */
 151 #define ETH_OVERRUN_ERROR                       0x00000002
 152 #define ETH_MAX_FRAME_LENGTH_ERROR              0x00000004
 153 #define ETH_RESOURCE_ERROR                      0x00000006
 154 #define ETH_VLAN_TAGGED                         0x00080000
 155 #define ETH_BPDU_FRAME                          0x00100000
 156 #define ETH_UDP_FRAME_OVER_IP_V_4               0x00200000
 157 #define ETH_OTHER_FRAME_TYPE                    0x00400000
 158 #define ETH_LAYER_2_IS_ETH_V_2                  0x00800000
 159 #define ETH_FRAME_TYPE_IP_V_4                   0x01000000
 160 #define ETH_FRAME_HEADER_OK                     0x02000000
 161 #define ETH_RX_LAST_DESC                        0x04000000
 162 #define ETH_RX_FIRST_DESC                       0x08000000
 163 #define ETH_UNKNOWN_DESTINATION_ADDR            0x10000000
 164 #define ETH_RX_ENABLE_INTERRUPT                 0x20000000
 165 #define ETH_LAYER_4_CHECKSUM_OK                 0x40000000
 166
 167 /* Rx descriptors byte count */
 168 #define ETH_FRAME_FRAGMENTED                    0x00000004
 169
 170 /* Tx descriptors command */
 171 #define ETH_LAYER_4_CHECKSUM_FIRST_DESC         0x00000400
 172 #define ETH_FRAME_SET_TO_VLAN                   0x00008000
 173 #define ETH_UDP_FRAME                           0x00010000
 174 #define ETH_GEN_TCP_UDP_CHECKSUM                0x00020000
 175 #define ETH_GEN_IP_V_4_CHECKSUM                 0x00040000
 176 #define ETH_ZERO_PADDING                        0x00080000
 177 #define ETH_TX_LAST_DESC                        0x00100000
 178 #define ETH_TX_FIRST_DESC                       0x00200000
 179 #define ETH_GEN_CRC                             0x00400000
 180 #define ETH_TX_ENABLE_INTERRUPT                 0x00800000
 181 #define ETH_AUTO_MODE                           0x40000000
 182
 183 #define ETH_TX_IHL_SHIFT                        11
 184
 185 /* typedefs */
 186
 187 typedef enum _eth_func_ret_status {
 188         ETH_OK,                 /* Returned as expected.                */
 189         ETH_ERROR,              /* Fundamental error.                   */
 190         ETH_RETRY,              /* Could not process request. Try later.*/
 191         ETH_END_OF_JOB,         /* Ring has nothing to process.         */
 192         ETH_QUEUE_FULL,         /* Ring resource error.                 */
 193         ETH_QUEUE_LAST_RESOURCE /* Ring resources about to exhaust.     */
 194 } ETH_FUNC_RET_STATUS;
 195
 196 typedef enum _eth_target {
 197         ETH_TARGET_DRAM,
 198         ETH_TARGET_DEVICE,
 199         ETH_TARGET_CBS,
 200         ETH_TARGET_PCI0,
 201         ETH_TARGET_PCI1
 202 } ETH_TARGET;
 203
 204 /* These are for big-endian machines.  Little endian needs different
 205  * definitions.
 206  */
 207 #if defined(__BIG_ENDIAN)
 208 struct eth_rx_desc {
 209         u16 byte_cnt;           /* Descriptor buffer byte count         */
 210         u16 buf_size;           /* Buffer size                          */
 211         u32 cmd_sts;            /* Descriptor command status            */
 212         u32 next_desc_ptr;      /* Next descriptor pointer              */
 213         u32 buf_ptr;            /* Descriptor buffer pointer            */
 214 };
 215
 216 struct eth_tx_desc {
 217         u16 byte_cnt;           /* buffer byte count                    */
 218         u16 l4i_chk;            /* CPU provided TCP checksum            */
 219         u32 cmd_sts;            /* Command/status field                 */
 220         u32 next_desc_ptr;      /* Pointer to next descriptor           */
 221         u32 buf_ptr;            /* pointer to buffer for this descriptor*/
 222 };
 223
 224 #elif defined(__LITTLE_ENDIAN)
 225 struct eth_rx_desc {
 226         u32 cmd_sts;            /* Descriptor command status            */
 227         u16 buf_size;           /* Buffer size                          */
 228         u16 byte_cnt;           /* Descriptor buffer byte count         */
 229         u32 buf_ptr;            /* Descriptor buffer pointer            */
 230         u32 next_desc_ptr;      /* Next descriptor pointer              */
 231 };
 232
 233 struct eth_tx_desc {
 234         u32 cmd_sts;            /* Command/status field                 */
 235         u16 l4i_chk;            /* CPU provided TCP checksum            */
 236         u16 byte_cnt;           /* buffer byte count                    */
 237         u32 buf_ptr;            /* pointer to buffer for this descriptor*/
 238         u32 next_desc_ptr;      /* Pointer to next descriptor           */
 239 };
 240 #else
 241 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
 242 #endif
 243
 244 /* Unified struct for Rx and Tx operations. The user is not required to */
 245 /* be familier with neither Tx nor Rx descriptors.                      */
 246 struct pkt_info {
 247         unsigned short byte_cnt;        /* Descriptor buffer byte count */
 248         unsigned short l4i_chk;         /* Tx CPU provided TCP Checksum */
 249         unsigned int cmd_sts;           /* Descriptor command status    */
 250         dma_addr_t buf_ptr;             /* Descriptor buffer pointer    */
 251         struct sk_buff *return_info;    /* User resource return information */
 252 };
 253
 254 /* Ethernet port specific information */
 255
 256 struct mv643xx_mib_counters {
 257         u64 good_octets_received;
 258         u32 bad_octets_received;
 259         u32 internal_mac_transmit_err;
 260         u32 good_frames_received;
 261         u32 bad_frames_received;
 262         u32 broadcast_frames_received;
 263         u32 multicast_frames_received;
 264         u32 frames_64_octets;
 265         u32 frames_65_to_127_octets;
 266         u32 frames_128_to_255_octets;
 267         u32 frames_256_to_511_octets;
 268         u32 frames_512_to_1023_octets;
 269         u32 frames_1024_to_max_octets;
 270         u64 good_octets_sent;
 271         u32 good_frames_sent;
 272         u32 excessive_collision;
 273         u32 multicast_frames_sent;
 274         u32 broadcast_frames_sent;
 275         u32 unrec_mac_control_received;
 276         u32 fc_sent;
 277         u32 good_fc_received;
 278         u32 bad_fc_received;
 279         u32 undersize_received;
 280         u32 fragments_received;
 281         u32 oversize_received;
 282         u32 jabber_received;
 283         u32 mac_receive_error;
 284         u32 bad_crc_event;
 285         u32 collision;
 286         u32 late_collision;
 287 };
 288
 289 struct mv643xx_private {
 290         int port_num;                   /* User Ethernet port number    */
 291
 292         u32 rx_sram_addr;               /* Base address of rx sram area */
 293         u32 rx_sram_size;               /* Size of rx sram area         */
 294         u32 tx_sram_addr;               /* Base address of tx sram area */
 295         u32 tx_sram_size;               /* Size of tx sram area         */
 296
 297         int rx_resource_err;            /* Rx ring resource error flag */
 298
 299         /* Tx/Rx rings managment indexes fields. For driver use */
 300
 301         /* Next available and first returning Rx resource */
 302         int rx_curr_desc_q, rx_used_desc_q;
 303
 304         /* Next available and first returning Tx resource */
 305         int tx_curr_desc_q, tx_used_desc_q;
 306
 307 #ifdef MV643XX_TX_FAST_REFILL
 308         u32 tx_clean_threshold;
 309 #endif
 310
 311         struct eth_rx_desc *p_rx_desc_area;
 312         dma_addr_t rx_desc_dma;
 313         int rx_desc_area_size;
 314         struct sk_buff **rx_skb;
 315
 316         struct eth_tx_desc *p_tx_desc_area;
 317         dma_addr_t tx_desc_dma;
 318         int tx_desc_area_size;
 319         struct sk_buff **tx_skb;
 320
 321         struct work_struct tx_timeout_task;
 322
 323         struct net_device *dev;
 324         struct napi_struct napi;
 325         struct net_device_stats stats;
 326         struct mv643xx_mib_counters mib_counters;
 327         spinlock_t lock;
 328         /* Size of Tx Ring per queue */
 329         int tx_ring_size;
 330         /* Number of tx descriptors in use */
 331         int tx_desc_count;
 332         /* Size of Rx Ring per queue */
 333         int rx_ring_size;
 334         /* Number of rx descriptors in use */
 335         int rx_desc_count;
 336
 337         /*
 338          * Used in case RX Ring is empty, which can be caused when
 339          * system does not have resources (skb's)
 340          */
 341         struct timer_list timeout;
 342
 343         u32 rx_int_coal;
 344         u32 tx_int_coal;
 345         struct mii_if_info mii;
 346 };
 347
 348 /* Port operation control routines */
 349 static void eth_port_init(struct mv643xx_private *mp);
 350 static void eth_port_reset(unsigned int eth_port_num);
 351 static void eth_port_start(struct net_device *dev);
 352
 353 /* PHY and MIB routines */
 354 static void ethernet_phy_reset(unsigned int eth_port_num);
 355
 356 static void eth_port_write_smi_reg(unsigned int eth_port_num,
 357                                    unsigned int phy_reg, unsigned int value);
 358
 359 static void eth_port_read_smi_reg(unsigned int eth_port_num,
 360                                   unsigned int phy_reg, unsigned int *value);
 361
 362 static void eth_clear_mib_counters(unsigned int eth_port_num);
 363
 364 /* Port data flow control routines */
 365 static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
 366                                             struct pkt_info *p_pkt_info);
 367 static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
 368                                               struct pkt_info *p_pkt_info);
 369
 370 #endif                          /* __MV643XX_ETH_H__ */