1/* 2 * Copyright (c) 2003-2008 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32#include "common.h" 33#include "regs.h" 34 35enum { 36 IDT75P52100 = 4, 37 IDT75N43102 = 5 38}; 39 40/* DBGI command mode */ 41enum { 42 DBGI_MODE_MBUS = 0, 43 DBGI_MODE_IDT52100 = 5 44}; 45 46/* IDT 75P52100 commands */ 47#define IDT_CMD_READ 0 48#define IDT_CMD_WRITE 1 49#define IDT_CMD_SEARCH 2 50#define IDT_CMD_LEARN 3 51 52/* IDT LAR register address and value for 144-bit mode (low 32 bits) */ 53#define IDT_LAR_ADR0 0x180006 54#define IDT_LAR_MODE144 0xffff0000 55 56/* IDT SCR and SSR addresses (low 32 bits) */ 57#define IDT_SCR_ADR0 0x180000 58#define IDT_SSR0_ADR0 0x180002 59#define IDT_SSR1_ADR0 0x180004 60 61/* IDT GMR base address (low 32 bits) */ 62#define IDT_GMR_BASE_ADR0 0x180020 63 64/* IDT data and mask array base addresses (low 32 bits) */ 65#define IDT_DATARY_BASE_ADR0 0 66#define IDT_MSKARY_BASE_ADR0 0x80000 67 68/* IDT 75N43102 commands */ 69#define IDT4_CMD_SEARCH144 3 70#define IDT4_CMD_WRITE 4 71#define IDT4_CMD_READ 5 72 73/* IDT 75N43102 SCR address (low 32 bits) */ 74#define IDT4_SCR_ADR0 0x3 75 76/* IDT 75N43102 GMR base addresses (low 32 bits) */ 77#define IDT4_GMR_BASE0 0x10 78#define IDT4_GMR_BASE1 0x20 79#define IDT4_GMR_BASE2 0x30 80 81/* IDT 75N43102 data and mask array base addresses (low 32 bits) */ 82#define IDT4_DATARY_BASE_ADR0 0x1000000 83#define IDT4_MSKARY_BASE_ADR0 0x2000000 84 85#define MAX_WRITE_ATTEMPTS 5 86 87#define MAX_ROUTES 2048 88 89/* 90 * Issue a command to the TCAM and wait for its completion. The address and 91 * any data required by the command must have been setup by the caller. 92 */ 93static int mc5_cmd_write(struct adapter *adapter, u32 cmd) 94{ 95 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_CMD, cmd); 96 return t3_wait_op_done(adapter, A_MC5_DB_DBGI_RSP_STATUS, 97 F_DBGIRSPVALID, 1, MAX_WRITE_ATTEMPTS, 1); 98} 99 100static inline void dbgi_wr_data3(struct adapter *adapter, u32 v1, u32 v2, 101 u32 v3) 102{ 103 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA0, v1); 104 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA1, v2); 105 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA2, v3); 106} 107 108/* 109 * Write data to the TCAM register at address (0, 0, addr_lo) using the TCAM 110 * command cmd. The data to be written must have been set up by the caller. 111 * Returns -1 on failure, 0 on success. 112 */ 113static int mc5_write(struct adapter *adapter, u32 addr_lo, u32 cmd) 114{ 115 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_ADDR0, addr_lo); 116 if (mc5_cmd_write(adapter, cmd) == 0) 117 return 0; 118 CH_ERR(adapter, "MC5 timeout writing to TCAM address 0x%x\n", 119 addr_lo); 120 return -1; 121} 122 123static int init_mask_data_array(struct mc5 *mc5, u32 mask_array_base, 124 u32 data_array_base, u32 write_cmd, 125 int addr_shift) 126{ 127 unsigned int i; 128 struct adapter *adap = mc5->adapter; 129 130 /* 131 * We need the size of the TCAM data and mask arrays in terms of 132 * 72-bit entries. 133 */ 134 unsigned int size72 = mc5->tcam_size; 135 unsigned int server_base = t3_read_reg(adap, A_MC5_DB_SERVER_INDEX); 136 137 if (mc5->mode == MC5_MODE_144_BIT) { 138 size72 *= 2; /* 1 144-bit entry is 2 72-bit entries */ 139 server_base *= 2; 140 } 141 142 /* Clear the data array */ 143 dbgi_wr_data3(adap, 0, 0, 0); 144 for (i = 0; i < size72; i++) 145 if (mc5_write(adap, data_array_base + (i << addr_shift), 146 write_cmd)) 147 return -1; 148 149 /* Initialize the mask array. */ 150 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff); 151 for (i = 0; i < size72; i++) { 152 if (i == server_base) /* entering server or routing region */ 153 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_DATA0, 154 mc5->mode == MC5_MODE_144_BIT ? 155 0xfffffff9 : 0xfffffffd); 156 if (mc5_write(adap, mask_array_base + (i << addr_shift), 157 write_cmd)) 158 return -1; 159 } 160 return 0; 161} 162 163static int init_idt52100(struct mc5 *mc5) 164{ 165 int i; 166 struct adapter *adap = mc5->adapter; 167 168 t3_write_reg(adap, A_MC5_DB_RSP_LATENCY, 169 V_RDLAT(0x15) | V_LRNLAT(0x15) | V_SRCHLAT(0x15)); 170 t3_write_reg(adap, A_MC5_DB_PART_ID_INDEX, 2); 171 172 /* 173 * Use GMRs 14-15 for ELOOKUP, GMRs 12-13 for SYN lookups, and 174 * GMRs 8-9 for ACK- and AOPEN searches. 175 */ 176 t3_write_reg(adap, A_MC5_DB_POPEN_DATA_WR_CMD, IDT_CMD_WRITE); 177 t3_write_reg(adap, A_MC5_DB_POPEN_MASK_WR_CMD, IDT_CMD_WRITE); 178 t3_write_reg(adap, A_MC5_DB_AOPEN_SRCH_CMD, IDT_CMD_SEARCH); 179 t3_write_reg(adap, A_MC5_DB_AOPEN_LRN_CMD, IDT_CMD_LEARN); 180 t3_write_reg(adap, A_MC5_DB_SYN_SRCH_CMD, IDT_CMD_SEARCH | 0x6000); 181 t3_write_reg(adap, A_MC5_DB_SYN_LRN_CMD, IDT_CMD_LEARN); 182 t3_write_reg(adap, A_MC5_DB_ACK_SRCH_CMD, IDT_CMD_SEARCH); 183 t3_write_reg(adap, A_MC5_DB_ACK_LRN_CMD, IDT_CMD_LEARN); 184 t3_write_reg(adap, A_MC5_DB_ILOOKUP_CMD, IDT_CMD_SEARCH); 185 t3_write_reg(adap, A_MC5_DB_ELOOKUP_CMD, IDT_CMD_SEARCH | 0x7000); 186 t3_write_reg(adap, A_MC5_DB_DATA_WRITE_CMD, IDT_CMD_WRITE); 187 t3_write_reg(adap, A_MC5_DB_DATA_READ_CMD, IDT_CMD_READ); 188 189 /* Set DBGI command mode for IDT TCAM. */ 190 t3_write_reg(adap, A_MC5_DB_DBGI_CONFIG, DBGI_MODE_IDT52100); 191 192 /* Set up LAR */ 193 dbgi_wr_data3(adap, IDT_LAR_MODE144, 0, 0); 194 if (mc5_write(adap, IDT_LAR_ADR0, IDT_CMD_WRITE)) 195 goto err; 196 197 /* Set up SSRs */ 198 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0); 199 if (mc5_write(adap, IDT_SSR0_ADR0, IDT_CMD_WRITE) || 200 mc5_write(adap, IDT_SSR1_ADR0, IDT_CMD_WRITE)) 201 goto err; 202 203 /* Set up GMRs */ 204 for (i = 0; i < 32; ++i) { 205 if (i >= 12 && i < 15) 206 dbgi_wr_data3(adap, 0xfffffff9, 0xffffffff, 0xff); 207 else if (i == 15) 208 dbgi_wr_data3(adap, 0xfffffff9, 0xffff8007, 0xff); 209 else 210 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff); 211 212 if (mc5_write(adap, IDT_GMR_BASE_ADR0 + i, IDT_CMD_WRITE)) 213 goto err; 214 } 215 216 /* Set up SCR */ 217 dbgi_wr_data3(adap, 1, 0, 0); 218 if (mc5_write(adap, IDT_SCR_ADR0, IDT_CMD_WRITE)) 219 goto err; 220 221 return init_mask_data_array(mc5, IDT_MSKARY_BASE_ADR0, 222 IDT_DATARY_BASE_ADR0, IDT_CMD_WRITE, 0); 223err: 224 return -EIO; 225} 226 227static int init_idt43102(struct mc5 *mc5) 228{ 229 int i; 230 struct adapter *adap = mc5->adapter; 231 232 t3_write_reg(adap, A_MC5_DB_RSP_LATENCY, 233 adap->params.rev == 0 ? V_RDLAT(0xd) | V_SRCHLAT(0x11) : 234 V_RDLAT(0xd) | V_SRCHLAT(0x12)); 235 236 /* 237 * Use GMRs 24-25 for ELOOKUP, GMRs 20-21 for SYN lookups, and no mask 238 * for ACK- and AOPEN searches. 239 */ 240 t3_write_reg(adap, A_MC5_DB_POPEN_DATA_WR_CMD, IDT4_CMD_WRITE); 241 t3_write_reg(adap, A_MC5_DB_POPEN_MASK_WR_CMD, IDT4_CMD_WRITE); 242 t3_write_reg(adap, A_MC5_DB_AOPEN_SRCH_CMD, 243 IDT4_CMD_SEARCH144 | 0x3800); 244 t3_write_reg(adap, A_MC5_DB_SYN_SRCH_CMD, IDT4_CMD_SEARCH144); 245 t3_write_reg(adap, A_MC5_DB_ACK_SRCH_CMD, IDT4_CMD_SEARCH144 | 0x3800); 246 t3_write_reg(adap, A_MC5_DB_ILOOKUP_CMD, IDT4_CMD_SEARCH144 | 0x3800); 247 t3_write_reg(adap, A_MC5_DB_ELOOKUP_CMD, IDT4_CMD_SEARCH144 | 0x800); 248 t3_write_reg(adap, A_MC5_DB_DATA_WRITE_CMD, IDT4_CMD_WRITE); 249 t3_write_reg(adap, A_MC5_DB_DATA_READ_CMD, IDT4_CMD_READ); 250 251 t3_write_reg(adap, A_MC5_DB_PART_ID_INDEX, 3); 252 253 /* Set DBGI command mode for IDT TCAM. */ 254 t3_write_reg(adap, A_MC5_DB_DBGI_CONFIG, DBGI_MODE_IDT52100); 255 256 /* Set up GMRs */ 257 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff); 258 for (i = 0; i < 7; ++i) 259 if (mc5_write(adap, IDT4_GMR_BASE0 + i, IDT4_CMD_WRITE)) 260 goto err; 261 262 for (i = 0; i < 4; ++i) 263 if (mc5_write(adap, IDT4_GMR_BASE2 + i, IDT4_CMD_WRITE)) 264 goto err; 265 266 dbgi_wr_data3(adap, 0xfffffff9, 0xffffffff, 0xff); 267 if (mc5_write(adap, IDT4_GMR_BASE1, IDT4_CMD_WRITE) || 268 mc5_write(adap, IDT4_GMR_BASE1 + 1, IDT4_CMD_WRITE) || 269 mc5_write(adap, IDT4_GMR_BASE1 + 4, IDT4_CMD_WRITE)) 270 goto err; 271 272 dbgi_wr_data3(adap, 0xfffffff9, 0xffff8007, 0xff); 273 if (mc5_write(adap, IDT4_GMR_BASE1 + 5, IDT4_CMD_WRITE)) 274 goto err; 275 276 /* Set up SCR */ 277 dbgi_wr_data3(adap, 0xf0000000, 0, 0); 278 if (mc5_write(adap, IDT4_SCR_ADR0, IDT4_CMD_WRITE)) 279 goto err; 280 281 return init_mask_data_array(mc5, IDT4_MSKARY_BASE_ADR0, 282 IDT4_DATARY_BASE_ADR0, IDT4_CMD_WRITE, 1); 283err: 284 return -EIO; 285} 286 287/* Put MC5 in DBGI mode. */ 288static inline void mc5_dbgi_mode_enable(const struct mc5 *mc5) 289{ 290 t3_write_reg(mc5->adapter, A_MC5_DB_CONFIG, 291 V_TMMODE(mc5->mode == MC5_MODE_72_BIT) | F_DBGIEN); 292} 293 294/* Put MC5 in M-Bus mode. */ 295static void mc5_dbgi_mode_disable(const struct mc5 *mc5) 296{ 297 t3_write_reg(mc5->adapter, A_MC5_DB_CONFIG, 298 V_TMMODE(mc5->mode == MC5_MODE_72_BIT) | 299 V_COMPEN(mc5->mode == MC5_MODE_72_BIT) | 300 V_PRTYEN(mc5->parity_enabled) | F_MBUSEN); 301} 302 303/* 304 * Initialization that requires the OS and protocol layers to already 305 * be initialized goes here. 306 */ 307int t3_mc5_init(struct mc5 *mc5, unsigned int nservers, unsigned int nfilters, 308 unsigned int nroutes) 309{ 310 u32 cfg; 311 int err; 312 unsigned int tcam_size = mc5->tcam_size; 313 struct adapter *adap = mc5->adapter; 314 315 if (!tcam_size) 316 return 0; 317 318 if (nroutes > MAX_ROUTES || nroutes + nservers + nfilters > tcam_size) 319 return -EINVAL; 320 321 /* Reset the TCAM */ 322 cfg = t3_read_reg(adap, A_MC5_DB_CONFIG) & ~F_TMMODE; 323 cfg |= V_TMMODE(mc5->mode == MC5_MODE_72_BIT) | F_TMRST; 324 t3_write_reg(adap, A_MC5_DB_CONFIG, cfg); 325 if (t3_wait_op_done(adap, A_MC5_DB_CONFIG, F_TMRDY, 1, 500, 0)) { 326 CH_ERR(adap, "TCAM reset timed out\n"); 327 return -1; 328 } 329 330 t3_write_reg(adap, A_MC5_DB_ROUTING_TABLE_INDEX, tcam_size - nroutes); 331 t3_write_reg(adap, A_MC5_DB_FILTER_TABLE, 332 tcam_size - nroutes - nfilters); 333 t3_write_reg(adap, A_MC5_DB_SERVER_INDEX, 334 tcam_size - nroutes - nfilters - nservers); 335 336 mc5->parity_enabled = 1; 337 338 /* All the TCAM addresses we access have only the low 32 bits non 0 */ 339 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_ADDR1, 0); 340 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_ADDR2, 0); 341 342 mc5_dbgi_mode_enable(mc5); 343 344 switch (mc5->part_type) { 345 case IDT75P52100: 346 err = init_idt52100(mc5); 347 break; 348 case IDT75N43102: 349 err = init_idt43102(mc5); 350 break; 351 default: 352 CH_ERR(adap, "Unsupported TCAM type %d\n", mc5->part_type); 353 err = -EINVAL; 354 break; 355 } 356 357 mc5_dbgi_mode_disable(mc5); 358 return err; 359} 360 361 362#define MC5_INT_FATAL (F_PARITYERR | F_REQQPARERR | F_DISPQPARERR) 363 364/* 365 * MC5 interrupt handler 366 */ 367void t3_mc5_intr_handler(struct mc5 *mc5) 368{ 369 struct adapter *adap = mc5->adapter; 370 u32 cause = t3_read_reg(adap, A_MC5_DB_INT_CAUSE); 371 372 if ((cause & F_PARITYERR) && mc5->parity_enabled) { 373 CH_ALERT(adap, "MC5 parity error\n"); 374 mc5->stats.parity_err++; 375 } 376 377 if (cause & F_REQQPARERR) { 378 CH_ALERT(adap, "MC5 request queue parity error\n"); 379 mc5->stats.reqq_parity_err++; 380 } 381 382 if (cause & F_DISPQPARERR) { 383 CH_ALERT(adap, "MC5 dispatch queue parity error\n"); 384 mc5->stats.dispq_parity_err++; 385 } 386 387 if (cause & F_ACTRGNFULL) 388 mc5->stats.active_rgn_full++; 389 if (cause & F_NFASRCHFAIL) 390 mc5->stats.nfa_srch_err++; 391 if (cause & F_UNKNOWNCMD) 392 mc5->stats.unknown_cmd++; 393 if (cause & F_DELACTEMPTY) 394 mc5->stats.del_act_empty++; 395 if (cause & MC5_INT_FATAL) 396 t3_fatal_err(adap); 397 398 t3_write_reg(adap, A_MC5_DB_INT_CAUSE, cause); 399} 400 401void t3_mc5_prep(struct adapter *adapter, struct mc5 *mc5, int mode) 402{ 403#define K * 1024 404 405 static unsigned int tcam_part_size[] = { /* in K 72-bit entries */ 406 64 K, 128 K, 256 K, 32 K 407 }; 408 409#undef K 410 411 u32 cfg = t3_read_reg(adapter, A_MC5_DB_CONFIG); 412 413 mc5->adapter = adapter; 414 mc5->mode = (unsigned char)mode; 415 mc5->part_type = (unsigned char)G_TMTYPE(cfg); 416 if (cfg & F_TMTYPEHI) 417 mc5->part_type |= 4; 418 419 mc5->tcam_size = tcam_part_size[G_TMPARTSIZE(cfg)]; 420 if (mode == MC5_MODE_144_BIT) 421 mc5->tcam_size /= 2; 422} 423