2 * Copyright (c) 2003-2007 Chelsio, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
40 /* DBGI command mode */
43 DBGI_MODE_IDT52100 = 5
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
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
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
61 /* IDT GMR base address (low 32 bits) */
62 #define IDT_GMR_BASE_ADR0 0x180020
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
68 /* IDT 75N43102 commands */
69 #define IDT4_CMD_SEARCH144 3
70 #define IDT4_CMD_WRITE 4
71 #define IDT4_CMD_READ 5
73 /* IDT 75N43102 SCR address (low 32 bits) */
74 #define IDT4_SCR_ADR0 0x3
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
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
85 #define MAX_WRITE_ATTEMPTS 5
87 #define MAX_ROUTES 2048
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.
93 static int mc5_cmd_write(struct adapter *adapter, u32 cmd)
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);
100 static inline void dbgi_wr_addr3(struct adapter *adapter, u32 v1, u32 v2,
103 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_ADDR0, v1);
104 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_ADDR1, v2);
105 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_ADDR2, v3);
108 static inline void dbgi_wr_data3(struct adapter *adapter, u32 v1, u32 v2,
111 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA0, v1);
112 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA1, v2);
113 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_DATA2, v3);
116 static inline void dbgi_rd_rsp3(struct adapter *adapter, u32 *v1, u32 *v2,
119 *v1 = t3_read_reg(adapter, A_MC5_DB_DBGI_RSP_DATA0);
120 *v2 = t3_read_reg(adapter, A_MC5_DB_DBGI_RSP_DATA1);
121 *v3 = t3_read_reg(adapter, A_MC5_DB_DBGI_RSP_DATA2);
125 * Write data to the TCAM register at address (0, 0, addr_lo) using the TCAM
126 * command cmd. The data to be written must have been set up by the caller.
127 * Returns -1 on failure, 0 on success.
129 static int mc5_write(struct adapter *adapter, u32 addr_lo, u32 cmd)
131 t3_write_reg(adapter, A_MC5_DB_DBGI_REQ_ADDR0, addr_lo);
132 if (mc5_cmd_write(adapter, cmd) == 0)
134 CH_ERR(adapter, "MC5 timeout writing to TCAM address 0x%x\n",
139 static int init_mask_data_array(struct mc5 *mc5, u32 mask_array_base,
140 u32 data_array_base, u32 write_cmd,
144 struct adapter *adap = mc5->adapter;
147 * We need the size of the TCAM data and mask arrays in terms of
150 unsigned int size72 = mc5->tcam_size;
151 unsigned int server_base = t3_read_reg(adap, A_MC5_DB_SERVER_INDEX);
153 if (mc5->mode == MC5_MODE_144_BIT) {
154 size72 *= 2; /* 1 144-bit entry is 2 72-bit entries */
158 /* Clear the data array */
159 dbgi_wr_data3(adap, 0, 0, 0);
160 for (i = 0; i < size72; i++)
161 if (mc5_write(adap, data_array_base + (i << addr_shift),
165 /* Initialize the mask array. */
166 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff);
167 for (i = 0; i < size72; i++) {
168 if (i == server_base) /* entering server or routing region */
169 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_DATA0,
170 mc5->mode == MC5_MODE_144_BIT ?
171 0xfffffff9 : 0xfffffffd);
172 if (mc5_write(adap, mask_array_base + (i << addr_shift),
179 static int init_idt52100(struct mc5 *mc5)
182 struct adapter *adap = mc5->adapter;
184 t3_write_reg(adap, A_MC5_DB_RSP_LATENCY,
185 V_RDLAT(0x15) | V_LRNLAT(0x15) | V_SRCHLAT(0x15));
186 t3_write_reg(adap, A_MC5_DB_PART_ID_INDEX, 2);
189 * Use GMRs 14-15 for ELOOKUP, GMRs 12-13 for SYN lookups, and
190 * GMRs 8-9 for ACK- and AOPEN searches.
192 t3_write_reg(adap, A_MC5_DB_POPEN_DATA_WR_CMD, IDT_CMD_WRITE);
193 t3_write_reg(adap, A_MC5_DB_POPEN_MASK_WR_CMD, IDT_CMD_WRITE);
194 t3_write_reg(adap, A_MC5_DB_AOPEN_SRCH_CMD, IDT_CMD_SEARCH);
195 t3_write_reg(adap, A_MC5_DB_AOPEN_LRN_CMD, IDT_CMD_LEARN);
196 t3_write_reg(adap, A_MC5_DB_SYN_SRCH_CMD, IDT_CMD_SEARCH | 0x6000);
197 t3_write_reg(adap, A_MC5_DB_SYN_LRN_CMD, IDT_CMD_LEARN);
198 t3_write_reg(adap, A_MC5_DB_ACK_SRCH_CMD, IDT_CMD_SEARCH);
199 t3_write_reg(adap, A_MC5_DB_ACK_LRN_CMD, IDT_CMD_LEARN);
200 t3_write_reg(adap, A_MC5_DB_ILOOKUP_CMD, IDT_CMD_SEARCH);
201 t3_write_reg(adap, A_MC5_DB_ELOOKUP_CMD, IDT_CMD_SEARCH | 0x7000);
202 t3_write_reg(adap, A_MC5_DB_DATA_WRITE_CMD, IDT_CMD_WRITE);
203 t3_write_reg(adap, A_MC5_DB_DATA_READ_CMD, IDT_CMD_READ);
205 /* Set DBGI command mode for IDT TCAM. */
206 t3_write_reg(adap, A_MC5_DB_DBGI_CONFIG, DBGI_MODE_IDT52100);
209 dbgi_wr_data3(adap, IDT_LAR_MODE144, 0, 0);
210 if (mc5_write(adap, IDT_LAR_ADR0, IDT_CMD_WRITE))
214 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0);
215 if (mc5_write(adap, IDT_SSR0_ADR0, IDT_CMD_WRITE) ||
216 mc5_write(adap, IDT_SSR1_ADR0, IDT_CMD_WRITE))
220 for (i = 0; i < 32; ++i) {
221 if (i >= 12 && i < 15)
222 dbgi_wr_data3(adap, 0xfffffff9, 0xffffffff, 0xff);
224 dbgi_wr_data3(adap, 0xfffffff9, 0xffff8007, 0xff);
226 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff);
228 if (mc5_write(adap, IDT_GMR_BASE_ADR0 + i, IDT_CMD_WRITE))
233 dbgi_wr_data3(adap, 1, 0, 0);
234 if (mc5_write(adap, IDT_SCR_ADR0, IDT_CMD_WRITE))
237 return init_mask_data_array(mc5, IDT_MSKARY_BASE_ADR0,
238 IDT_DATARY_BASE_ADR0, IDT_CMD_WRITE, 0);
243 static int init_idt43102(struct mc5 *mc5)
246 struct adapter *adap = mc5->adapter;
248 t3_write_reg(adap, A_MC5_DB_RSP_LATENCY,
249 adap->params.rev == 0 ? V_RDLAT(0xd) | V_SRCHLAT(0x11) :
250 V_RDLAT(0xd) | V_SRCHLAT(0x12));
253 * Use GMRs 24-25 for ELOOKUP, GMRs 20-21 for SYN lookups, and no mask
254 * for ACK- and AOPEN searches.
256 t3_write_reg(adap, A_MC5_DB_POPEN_DATA_WR_CMD, IDT4_CMD_WRITE);
257 t3_write_reg(adap, A_MC5_DB_POPEN_MASK_WR_CMD, IDT4_CMD_WRITE);
258 t3_write_reg(adap, A_MC5_DB_AOPEN_SRCH_CMD,
259 IDT4_CMD_SEARCH144 | 0x3800);
260 t3_write_reg(adap, A_MC5_DB_SYN_SRCH_CMD, IDT4_CMD_SEARCH144);
261 t3_write_reg(adap, A_MC5_DB_ACK_SRCH_CMD, IDT4_CMD_SEARCH144 | 0x3800);
262 t3_write_reg(adap, A_MC5_DB_ILOOKUP_CMD, IDT4_CMD_SEARCH144 | 0x3800);
263 t3_write_reg(adap, A_MC5_DB_ELOOKUP_CMD, IDT4_CMD_SEARCH144 | 0x800);
264 t3_write_reg(adap, A_MC5_DB_DATA_WRITE_CMD, IDT4_CMD_WRITE);
265 t3_write_reg(adap, A_MC5_DB_DATA_READ_CMD, IDT4_CMD_READ);
267 t3_write_reg(adap, A_MC5_DB_PART_ID_INDEX, 3);
269 /* Set DBGI command mode for IDT TCAM. */
270 t3_write_reg(adap, A_MC5_DB_DBGI_CONFIG, DBGI_MODE_IDT52100);
273 dbgi_wr_data3(adap, 0xffffffff, 0xffffffff, 0xff);
274 for (i = 0; i < 7; ++i)
275 if (mc5_write(adap, IDT4_GMR_BASE0 + i, IDT4_CMD_WRITE))
278 for (i = 0; i < 4; ++i)
279 if (mc5_write(adap, IDT4_GMR_BASE2 + i, IDT4_CMD_WRITE))
282 dbgi_wr_data3(adap, 0xfffffff9, 0xffffffff, 0xff);
283 if (mc5_write(adap, IDT4_GMR_BASE1, IDT4_CMD_WRITE) ||
284 mc5_write(adap, IDT4_GMR_BASE1 + 1, IDT4_CMD_WRITE) ||
285 mc5_write(adap, IDT4_GMR_BASE1 + 4, IDT4_CMD_WRITE))
288 dbgi_wr_data3(adap, 0xfffffff9, 0xffff8007, 0xff);
289 if (mc5_write(adap, IDT4_GMR_BASE1 + 5, IDT4_CMD_WRITE))
293 dbgi_wr_data3(adap, 0xf0000000, 0, 0);
294 if (mc5_write(adap, IDT4_SCR_ADR0, IDT4_CMD_WRITE))
297 return init_mask_data_array(mc5, IDT4_MSKARY_BASE_ADR0,
298 IDT4_DATARY_BASE_ADR0, IDT4_CMD_WRITE, 1);
303 /* Put MC5 in DBGI mode. */
304 static inline void mc5_dbgi_mode_enable(const struct mc5 *mc5)
306 t3_write_reg(mc5->adapter, A_MC5_DB_CONFIG,
307 V_TMMODE(mc5->mode == MC5_MODE_72_BIT) | F_DBGIEN);
310 /* Put MC5 in M-Bus mode. */
311 static void mc5_dbgi_mode_disable(const struct mc5 *mc5)
313 t3_write_reg(mc5->adapter, A_MC5_DB_CONFIG,
314 V_TMMODE(mc5->mode == MC5_MODE_72_BIT) |
315 V_COMPEN(mc5->mode == MC5_MODE_72_BIT) |
316 V_PRTYEN(mc5->parity_enabled) | F_MBUSEN);
320 * Initialization that requires the OS and protocol layers to already
321 * be intialized goes here.
323 int t3_mc5_init(struct mc5 *mc5, unsigned int nservers, unsigned int nfilters,
324 unsigned int nroutes)
328 unsigned int tcam_size = mc5->tcam_size;
329 struct adapter *adap = mc5->adapter;
331 if (nroutes > MAX_ROUTES || nroutes + nservers + nfilters > tcam_size)
335 cfg = t3_read_reg(adap, A_MC5_DB_CONFIG) & ~F_TMMODE;
336 cfg |= V_TMMODE(mc5->mode == MC5_MODE_72_BIT) | F_TMRST;
337 t3_write_reg(adap, A_MC5_DB_CONFIG, cfg);
338 if (t3_wait_op_done(adap, A_MC5_DB_CONFIG, F_TMRDY, 1, 500, 0)) {
339 CH_ERR(adap, "TCAM reset timed out\n");
343 t3_write_reg(adap, A_MC5_DB_ROUTING_TABLE_INDEX, tcam_size - nroutes);
344 t3_write_reg(adap, A_MC5_DB_FILTER_TABLE,
345 tcam_size - nroutes - nfilters);
346 t3_write_reg(adap, A_MC5_DB_SERVER_INDEX,
347 tcam_size - nroutes - nfilters - nservers);
349 mc5->parity_enabled = 1;
351 /* All the TCAM addresses we access have only the low 32 bits non 0 */
352 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_ADDR1, 0);
353 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_ADDR2, 0);
355 mc5_dbgi_mode_enable(mc5);
357 switch (mc5->part_type) {
359 err = init_idt52100(mc5);
362 err = init_idt43102(mc5);
365 CH_ERR(adap, "Unsupported TCAM type %d\n", mc5->part_type);
370 mc5_dbgi_mode_disable(mc5);
375 * read_mc5_range - dump a part of the memory managed by MC5
376 * @mc5: the MC5 handle
377 * @start: the start address for the dump
378 * @n: number of 72-bit words to read
379 * @buf: result buffer
381 * Read n 72-bit words from MC5 memory from the given start location.
383 int t3_read_mc5_range(const struct mc5 *mc5, unsigned int start,
384 unsigned int n, u32 *buf)
388 struct adapter *adap = mc5->adapter;
390 if (mc5->part_type == IDT75P52100)
391 read_cmd = IDT_CMD_READ;
392 else if (mc5->part_type == IDT75N43102)
393 read_cmd = IDT4_CMD_READ;
397 mc5_dbgi_mode_enable(mc5);
400 t3_write_reg(adap, A_MC5_DB_DBGI_REQ_ADDR0, start++);
401 if (mc5_cmd_write(adap, read_cmd)) {
405 dbgi_rd_rsp3(adap, buf + 2, buf + 1, buf);
409 mc5_dbgi_mode_disable(mc5);
413 #define MC5_INT_FATAL (F_PARITYERR | F_REQQPARERR | F_DISPQPARERR)
416 * MC5 interrupt handler
418 void t3_mc5_intr_handler(struct mc5 *mc5)
420 struct adapter *adap = mc5->adapter;
421 u32 cause = t3_read_reg(adap, A_MC5_DB_INT_CAUSE);
423 if ((cause & F_PARITYERR) && mc5->parity_enabled) {
424 CH_ALERT(adap, "MC5 parity error\n");
425 mc5->stats.parity_err++;
428 if (cause & F_REQQPARERR) {
429 CH_ALERT(adap, "MC5 request queue parity error\n");
430 mc5->stats.reqq_parity_err++;
433 if (cause & F_DISPQPARERR) {
434 CH_ALERT(adap, "MC5 dispatch queue parity error\n");
435 mc5->stats.dispq_parity_err++;
438 if (cause & F_ACTRGNFULL)
439 mc5->stats.active_rgn_full++;
440 if (cause & F_NFASRCHFAIL)
441 mc5->stats.nfa_srch_err++;
442 if (cause & F_UNKNOWNCMD)
443 mc5->stats.unknown_cmd++;
444 if (cause & F_DELACTEMPTY)
445 mc5->stats.del_act_empty++;
446 if (cause & MC5_INT_FATAL)
449 t3_write_reg(adap, A_MC5_DB_INT_CAUSE, cause);
452 void __devinit t3_mc5_prep(struct adapter *adapter, struct mc5 *mc5, int mode)
456 static unsigned int tcam_part_size[] = { /* in K 72-bit entries */
457 64 K, 128 K, 256 K, 32 K
462 u32 cfg = t3_read_reg(adapter, A_MC5_DB_CONFIG);
464 mc5->adapter = adapter;
465 mc5->mode = (unsigned char)mode;
466 mc5->part_type = (unsigned char)G_TMTYPE(cfg);
467 if (cfg & F_TMTYPEHI)
470 mc5->tcam_size = tcam_part_size[G_TMPARTSIZE(cfg)];
471 if (mode == MC5_MODE_144_BIT)