drivers/net/ethernet/apm/xgene/xgene_enet_hw.h

   1 /* Applied Micro X-Gene SoC Ethernet Driver
   2  *
   3  * Copyright (c) 2014, Applied Micro Circuits Corporation
   4  * Authors: Iyappan Subramanian <isubramanian@apm.com>
   5  *          Ravi Patel <rapatel@apm.com>
   6  *          Keyur Chudgar <kchudgar@apm.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #ifndef __XGENE_ENET_HW_H__
  23 #define __XGENE_ENET_HW_H__
  24
  25 #include "xgene_enet_main.h"
  26
  27 struct xgene_enet_pdata;
  28 struct xgene_enet_stats;
  29 struct xgene_enet_desc_ring;
  30
  31 /* clears and then set bits */
  32 static inline void xgene_set_bits(u32 *dst, u32 val, u32 start, u32 len)
  33 {
  34         u32 end = start + len - 1;
  35         u32 mask = GENMASK(end, start);
  36
  37         *dst &= ~mask;
  38         *dst |= (val << start) & mask;
  39 }
  40
  41 static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
  42 {
  43         return (val & GENMASK(end, start)) >> start;
  44 }
  45
  46 enum xgene_enet_rm {
  47         RM0,
  48         RM1,
  49         RM3 = 3
  50 };
  51
  52 #define CSR_RING_ID             0x0008
  53 #define OVERWRITE               BIT(31)
  54 #define IS_BUFFER_POOL          BIT(20)
  55 #define PREFETCH_BUF_EN         BIT(21)
  56 #define CSR_RING_ID_BUF         0x000c
  57 #define CSR_RING_NE_INT_MODE    0x017c
  58 #define CSR_RING_CONFIG         0x006c
  59 #define CSR_RING_WR_BASE        0x0070
  60 #define NUM_RING_CONFIG         5
  61 #define BUFPOOL_MODE            3
  62 #define INC_DEC_CMD_ADDR        0x002c
  63 #define UDP_HDR_SIZE            2
  64 #define BUF_LEN_CODE_2K         0x5000
  65
  66 #define CREATE_MASK(pos, len)           GENMASK((pos)+(len)-1, (pos))
  67 #define CREATE_MASK_ULL(pos, len)       GENMASK_ULL((pos)+(len)-1, (pos))
  68
  69 /* Empty slot soft signature */
  70 #define EMPTY_SLOT_INDEX        1
  71 #define EMPTY_SLOT              ~0ULL
  72
  73 #define WORK_DESC_SIZE          32
  74 #define BUFPOOL_DESC_SIZE       16
  75
  76 #define RING_OWNER_MASK         GENMASK(9, 6)
  77 #define RING_BUFNUM_MASK        GENMASK(5, 0)
  78
  79 #define SELTHRSH_POS            3
  80 #define SELTHRSH_LEN            3
  81 #define RINGADDRL_POS           5
  82 #define RINGADDRL_LEN           27
  83 #define RINGADDRH_POS           0
  84 #define RINGADDRH_LEN           6
  85 #define RINGSIZE_POS            23
  86 #define RINGSIZE_LEN            3
  87 #define RINGTYPE_POS            19
  88 #define RINGTYPE_LEN            2
  89 #define RINGMODE_POS            20
  90 #define RINGMODE_LEN            3
  91 #define RECOMTIMEOUTL_POS       28
  92 #define RECOMTIMEOUTL_LEN       3
  93 #define RECOMTIMEOUTH_POS       0
  94 #define RECOMTIMEOUTH_LEN       2
  95 #define NUMMSGSINQ_POS          1
  96 #define NUMMSGSINQ_LEN          16
  97 #define ACCEPTLERR              BIT(19)
  98 #define QCOHERENT               BIT(4)
  99 #define RECOMBBUF               BIT(27)
 100
 101 #define MAC_OFFSET                      0x30
 102
 103 #define BLOCK_ETH_CSR_OFFSET            0x2000
 104 #define BLOCK_ETH_RING_IF_OFFSET        0x9000
 105 #define BLOCK_ETH_CLKRST_CSR_OFFSET     0xc000
 106 #define BLOCK_ETH_DIAG_CSR_OFFSET       0xD000
 107 #define BLOCK_ETH_MAC_OFFSET            0x0000
 108 #define BLOCK_ETH_MAC_CSR_OFFSET        0x2800
 109
 110 #define CLKEN_ADDR                      0xc208
 111 #define SRST_ADDR                       0xc200
 112
 113 #define MAC_ADDR_REG_OFFSET             0x00
 114 #define MAC_COMMAND_REG_OFFSET          0x04
 115 #define MAC_WRITE_REG_OFFSET            0x08
 116 #define MAC_READ_REG_OFFSET             0x0c
 117 #define MAC_COMMAND_DONE_REG_OFFSET     0x10
 118
 119 #define MII_MGMT_CONFIG_ADDR            0x20
 120 #define MII_MGMT_COMMAND_ADDR           0x24
 121 #define MII_MGMT_ADDRESS_ADDR           0x28
 122 #define MII_MGMT_CONTROL_ADDR           0x2c
 123 #define MII_MGMT_STATUS_ADDR            0x30
 124 #define MII_MGMT_INDICATORS_ADDR        0x34
 125
 126 #define BUSY_MASK                       BIT(0)
 127 #define READ_CYCLE_MASK                 BIT(0)
 128 #define PHY_CONTROL_SET(dst, val)       xgene_set_bits(dst, val, 0, 16)
 129
 130 #define ENET_SPARE_CFG_REG_ADDR         0x0750
 131 #define RSIF_CONFIG_REG_ADDR            0x0010
 132 #define RSIF_RAM_DBG_REG0_ADDR          0x0048
 133 #define RGMII_REG_0_ADDR                0x07e0
 134 #define CFG_LINK_AGGR_RESUME_0_ADDR     0x07c8
 135 #define DEBUG_REG_ADDR                  0x0700
 136 #define CFG_BYPASS_ADDR                 0x0294
 137 #define CLE_BYPASS_REG0_0_ADDR          0x0490
 138 #define CLE_BYPASS_REG1_0_ADDR          0x0494
 139 #define CFG_RSIF_FPBUFF_TIMEOUT_EN      BIT(31)
 140 #define RESUME_TX                       BIT(0)
 141 #define CFG_SPEED_1250                  BIT(24)
 142 #define TX_PORT0                        BIT(0)
 143 #define CFG_BYPASS_UNISEC_TX            BIT(2)
 144 #define CFG_BYPASS_UNISEC_RX            BIT(1)
 145 #define CFG_CLE_BYPASS_EN0              BIT(31)
 146 #define CFG_TXCLK_MUXSEL0_SET(dst, val) xgene_set_bits(dst, val, 29, 3)
 147
 148 #define CFG_CLE_IP_PROTOCOL0_SET(dst, val)      xgene_set_bits(dst, val, 16, 2)
 149 #define CFG_CLE_DSTQID0_SET(dst, val)           xgene_set_bits(dst, val, 0, 12)
 150 #define CFG_CLE_FPSEL0_SET(dst, val)            xgene_set_bits(dst, val, 16, 4)
 151 #define CFG_MACMODE_SET(dst, val)               xgene_set_bits(dst, val, 18, 2)
 152 #define CFG_WAITASYNCRD_SET(dst, val)           xgene_set_bits(dst, val, 0, 16)
 153 #define CFG_CLE_DSTQID0(val)            (val & GENMASK(11, 0))
 154 #define CFG_CLE_FPSEL0(val)             ((val << 16) & GENMASK(19, 16))
 155 #define ICM_CONFIG0_REG_0_ADDR          0x0400
 156 #define ICM_CONFIG2_REG_0_ADDR          0x0410
 157 #define RX_DV_GATE_REG_0_ADDR           0x05fc
 158 #define TX_DV_GATE_EN0                  BIT(2)
 159 #define RX_DV_GATE_EN0                  BIT(1)
 160 #define RESUME_RX0                      BIT(0)
 161 #define ENET_CFGSSQMIWQASSOC_ADDR               0xe0
 162 #define ENET_CFGSSQMIFPQASSOC_ADDR              0xdc
 163 #define ENET_CFGSSQMIQMLITEFPQASSOC_ADDR        0xf0
 164 #define ENET_CFGSSQMIQMLITEWQASSOC_ADDR         0xf4
 165 #define ENET_CFG_MEM_RAM_SHUTDOWN_ADDR          0x70
 166 #define ENET_BLOCK_MEM_RDY_ADDR                 0x74
 167 #define MAC_CONFIG_1_ADDR                       0x00
 168 #define MAC_CONFIG_2_ADDR                       0x04
 169 #define MAX_FRAME_LEN_ADDR                      0x10
 170 #define INTERFACE_CONTROL_ADDR                  0x38
 171 #define STATION_ADDR0_ADDR                      0x40
 172 #define STATION_ADDR1_ADDR                      0x44
 173 #define PHY_ADDR_SET(dst, val)                  xgene_set_bits(dst, val, 8, 5)
 174 #define REG_ADDR_SET(dst, val)                  xgene_set_bits(dst, val, 0, 5)
 175 #define ENET_INTERFACE_MODE2_SET(dst, val)      xgene_set_bits(dst, val, 8, 2)
 176 #define MGMT_CLOCK_SEL_SET(dst, val)            xgene_set_bits(dst, val, 0, 3)
 177 #define SOFT_RESET1                     BIT(31)
 178 #define TX_EN                           BIT(0)
 179 #define RX_EN                           BIT(2)
 180 #define ENET_LHD_MODE                   BIT(25)
 181 #define ENET_GHD_MODE                   BIT(26)
 182 #define FULL_DUPLEX2                    BIT(0)
 183 #define SCAN_AUTO_INCR                  BIT(5)
 184 #define TBYT_ADDR                       0x38
 185 #define TPKT_ADDR                       0x39
 186 #define TDRP_ADDR                       0x45
 187 #define TFCS_ADDR                       0x47
 188 #define TUND_ADDR                       0x4a
 189
 190 #define TSO_IPPROTO_TCP                 1
 191
 192 #define USERINFO_POS                    0
 193 #define USERINFO_LEN                    32
 194 #define FPQNUM_POS                      32
 195 #define FPQNUM_LEN                      12
 196 #define LERR_POS                        60
 197 #define LERR_LEN                        3
 198 #define STASH_POS                       52
 199 #define STASH_LEN                       2
 200 #define BUFDATALEN_POS                  48
 201 #define BUFDATALEN_LEN                  12
 202 #define DATAADDR_POS                    0
 203 #define DATAADDR_LEN                    42
 204 #define COHERENT_POS                    63
 205 #define HENQNUM_POS                     48
 206 #define HENQNUM_LEN                     12
 207 #define TYPESEL_POS                     44
 208 #define TYPESEL_LEN                     4
 209 #define ETHHDR_POS                      12
 210 #define ETHHDR_LEN                      8
 211 #define IC_POS                          35      /* Insert CRC */
 212 #define TCPHDR_POS                      0
 213 #define TCPHDR_LEN                      6
 214 #define IPHDR_POS                       6
 215 #define IPHDR_LEN                       6
 216 #define EC_POS                          22      /* Enable checksum */
 217 #define EC_LEN                          1
 218 #define IS_POS                          24      /* IP protocol select */
 219 #define IS_LEN                          1
 220 #define TYPE_ETH_WORK_MESSAGE_POS       44
 221
 222 struct xgene_enet_raw_desc {
 223         __le64 m0;
 224         __le64 m1;
 225         __le64 m2;
 226         __le64 m3;
 227 };
 228
 229 struct xgene_enet_raw_desc16 {
 230         __le64 m0;
 231         __le64 m1;
 232 };
 233
 234 static inline void xgene_enet_mark_desc_slot_empty(void *desc_slot_ptr)
 235 {
 236         __le64 *desc_slot = desc_slot_ptr;
 237
 238         desc_slot[EMPTY_SLOT_INDEX] = cpu_to_le64(EMPTY_SLOT);
 239 }
 240
 241 static inline bool xgene_enet_is_desc_slot_empty(void *desc_slot_ptr)
 242 {
 243         __le64 *desc_slot = desc_slot_ptr;
 244
 245         return (desc_slot[EMPTY_SLOT_INDEX] == cpu_to_le64(EMPTY_SLOT));
 246 }
 247
 248 enum xgene_enet_ring_cfgsize {
 249         RING_CFGSIZE_512B,
 250         RING_CFGSIZE_2KB,
 251         RING_CFGSIZE_16KB,
 252         RING_CFGSIZE_64KB,
 253         RING_CFGSIZE_512KB,
 254         RING_CFGSIZE_INVALID
 255 };
 256
 257 enum xgene_enet_ring_type {
 258         RING_DISABLED,
 259         RING_REGULAR,
 260         RING_BUFPOOL
 261 };
 262
 263 enum xgene_ring_owner {
 264         RING_OWNER_ETH0,
 265         RING_OWNER_ETH1,
 266         RING_OWNER_CPU = 15,
 267         RING_OWNER_INVALID
 268 };
 269
 270 enum xgene_enet_ring_bufnum {
 271         RING_BUFNUM_REGULAR = 0x0,
 272         RING_BUFNUM_BUFPOOL = 0x20,
 273         RING_BUFNUM_INVALID
 274 };
 275
 276 enum xgene_enet_cmd {
 277         XGENE_ENET_WR_CMD = BIT(31),
 278         XGENE_ENET_RD_CMD = BIT(30)
 279 };
 280
 281 enum xgene_enet_err_code {
 282         HBF_READ_DATA = 3,
 283         HBF_LL_READ = 4,
 284         BAD_WORK_MSG = 6,
 285         BUFPOOL_TIMEOUT = 15,
 286         INGRESS_CRC = 16,
 287         INGRESS_CHECKSUM = 17,
 288         INGRESS_TRUNC_FRAME = 18,
 289         INGRESS_PKT_LEN = 19,
 290         INGRESS_PKT_UNDER = 20,
 291         INGRESS_FIFO_OVERRUN = 21,
 292         INGRESS_CHECKSUM_COMPUTE = 26,
 293         ERR_CODE_INVALID
 294 };
 295
 296 static inline enum xgene_ring_owner xgene_enet_ring_owner(u16 id)
 297 {
 298         return (id & RING_OWNER_MASK) >> 6;
 299 }
 300
 301 static inline u8 xgene_enet_ring_bufnum(u16 id)
 302 {
 303         return id & RING_BUFNUM_MASK;
 304 }
 305
 306 static inline bool xgene_enet_is_bufpool(u16 id)
 307 {
 308         return ((id & RING_BUFNUM_MASK) >= 0x20) ? true : false;
 309 }
 310
 311 static inline u16 xgene_enet_get_numslots(u16 id, u32 size)
 312 {
 313         bool is_bufpool = xgene_enet_is_bufpool(id);
 314
 315         return (is_bufpool) ? size / BUFPOOL_DESC_SIZE :
 316                       size / WORK_DESC_SIZE;
 317 }
 318
 319 void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
 320                             struct xgene_enet_pdata *pdata,
 321                             enum xgene_enet_err_code status);
 322
 323 int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata);
 324 void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
 325 bool xgene_ring_mgr_init(struct xgene_enet_pdata *p);
 326
 327 extern struct xgene_mac_ops xgene_gmac_ops;
 328 extern struct xgene_port_ops xgene_gport_ops;
 329 extern struct xgene_ring_ops xgene_ring1_ops;
 330
 331 #endif /* __XGENE_ENET_HW_H__ */