1 /***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28 /*
29 * Small helper utilities.
30 */
31 #include <linux/kernel.h>
32
33 #include <asm/octeon/octeon.h>
34
35 #include <asm/octeon/cvmx-config.h>
36
37 #include <asm/octeon/cvmx-fpa.h>
38 #include <asm/octeon/cvmx-pip.h>
39 #include <asm/octeon/cvmx-pko.h>
40 #include <asm/octeon/cvmx-ipd.h>
41 #include <asm/octeon/cvmx-spi.h>
42
43 #include <asm/octeon/cvmx-helper.h>
44 #include <asm/octeon/cvmx-helper-util.h>
45
46 #include <asm/octeon/cvmx-ipd-defs.h>
47
48 /**
49 * Convert a interface mode into a human readable string
50 *
51 * @mode: Mode to convert
52 *
53 * Returns String
54 */
cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode)55 const char *cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t
56 mode)
57 {
58 switch (mode) {
59 case CVMX_HELPER_INTERFACE_MODE_DISABLED:
60 return "DISABLED";
61 case CVMX_HELPER_INTERFACE_MODE_RGMII:
62 return "RGMII";
63 case CVMX_HELPER_INTERFACE_MODE_GMII:
64 return "GMII";
65 case CVMX_HELPER_INTERFACE_MODE_SPI:
66 return "SPI";
67 case CVMX_HELPER_INTERFACE_MODE_PCIE:
68 return "PCIE";
69 case CVMX_HELPER_INTERFACE_MODE_XAUI:
70 return "XAUI";
71 case CVMX_HELPER_INTERFACE_MODE_SGMII:
72 return "SGMII";
73 case CVMX_HELPER_INTERFACE_MODE_PICMG:
74 return "PICMG";
75 case CVMX_HELPER_INTERFACE_MODE_NPI:
76 return "NPI";
77 case CVMX_HELPER_INTERFACE_MODE_LOOP:
78 return "LOOP";
79 }
80 return "UNKNOWN";
81 }
82
83 /**
84 * Debug routine to dump the packet structure to the console
85 *
86 * @work: Work queue entry containing the packet to dump
87 * Returns
88 */
cvmx_helper_dump_packet(cvmx_wqe_t * work)89 int cvmx_helper_dump_packet(cvmx_wqe_t *work)
90 {
91 uint64_t count;
92 uint64_t remaining_bytes;
93 union cvmx_buf_ptr buffer_ptr;
94 uint64_t start_of_buffer;
95 uint8_t *data_address;
96 uint8_t *end_of_data;
97
98 cvmx_dprintf("Packet Length: %u\n", work->len);
99 cvmx_dprintf(" Input Port: %u\n", work->ipprt);
100 cvmx_dprintf(" QoS: %u\n", work->qos);
101 cvmx_dprintf(" Buffers: %u\n", work->word2.s.bufs);
102
103 if (work->word2.s.bufs == 0) {
104 union cvmx_ipd_wqe_fpa_queue wqe_pool;
105 wqe_pool.u64 = cvmx_read_csr(CVMX_IPD_WQE_FPA_QUEUE);
106 buffer_ptr.u64 = 0;
107 buffer_ptr.s.pool = wqe_pool.s.wqe_pool;
108 buffer_ptr.s.size = 128;
109 buffer_ptr.s.addr = cvmx_ptr_to_phys(work->packet_data);
110 if (likely(!work->word2.s.not_IP)) {
111 union cvmx_pip_ip_offset pip_ip_offset;
112 pip_ip_offset.u64 = cvmx_read_csr(CVMX_PIP_IP_OFFSET);
113 buffer_ptr.s.addr +=
114 (pip_ip_offset.s.offset << 3) -
115 work->word2.s.ip_offset;
116 buffer_ptr.s.addr += (work->word2.s.is_v6 ^ 1) << 2;
117 } else {
118 /*
119 * WARNING: This code assumes that the packet
120 * is not RAW. If it was, we would use
121 * PIP_GBL_CFG[RAW_SHF] instead of
122 * PIP_GBL_CFG[NIP_SHF].
123 */
124 union cvmx_pip_gbl_cfg pip_gbl_cfg;
125 pip_gbl_cfg.u64 = cvmx_read_csr(CVMX_PIP_GBL_CFG);
126 buffer_ptr.s.addr += pip_gbl_cfg.s.nip_shf;
127 }
128 } else
129 buffer_ptr = work->packet_ptr;
130 remaining_bytes = work->len;
131
132 while (remaining_bytes) {
133 start_of_buffer =
134 ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
135 cvmx_dprintf(" Buffer Start:%llx\n",
136 (unsigned long long)start_of_buffer);
137 cvmx_dprintf(" Buffer I : %u\n", buffer_ptr.s.i);
138 cvmx_dprintf(" Buffer Back: %u\n", buffer_ptr.s.back);
139 cvmx_dprintf(" Buffer Pool: %u\n", buffer_ptr.s.pool);
140 cvmx_dprintf(" Buffer Data: %llx\n",
141 (unsigned long long)buffer_ptr.s.addr);
142 cvmx_dprintf(" Buffer Size: %u\n", buffer_ptr.s.size);
143
144 cvmx_dprintf("\t\t");
145 data_address = (uint8_t *) cvmx_phys_to_ptr(buffer_ptr.s.addr);
146 end_of_data = data_address + buffer_ptr.s.size;
147 count = 0;
148 while (data_address < end_of_data) {
149 if (remaining_bytes == 0)
150 break;
151 else
152 remaining_bytes--;
153 cvmx_dprintf("%02x", (unsigned int)*data_address);
154 data_address++;
155 if (remaining_bytes && (count == 7)) {
156 cvmx_dprintf("\n\t\t");
157 count = 0;
158 } else
159 count++;
160 }
161 cvmx_dprintf("\n");
162
163 if (remaining_bytes)
164 buffer_ptr = *(union cvmx_buf_ptr *)
165 cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
166 }
167 return 0;
168 }
169
170 /**
171 * Setup Random Early Drop on a specific input queue
172 *
173 * @queue: Input queue to setup RED on (0-7)
174 * @pass_thresh:
175 * Packets will begin slowly dropping when there are less than
176 * this many packet buffers free in FPA 0.
177 * @drop_thresh:
178 * All incomming packets will be dropped when there are less
179 * than this many free packet buffers in FPA 0.
180 * Returns Zero on success. Negative on failure
181 */
cvmx_helper_setup_red_queue(int queue,int pass_thresh,int drop_thresh)182 int cvmx_helper_setup_red_queue(int queue, int pass_thresh, int drop_thresh)
183 {
184 union cvmx_ipd_qosx_red_marks red_marks;
185 union cvmx_ipd_red_quex_param red_param;
186
187 /* Set RED to begin dropping packets when there are pass_thresh buffers
188 left. It will linearly drop more packets until reaching drop_thresh
189 buffers */
190 red_marks.u64 = 0;
191 red_marks.s.drop = drop_thresh;
192 red_marks.s.pass = pass_thresh;
193 cvmx_write_csr(CVMX_IPD_QOSX_RED_MARKS(queue), red_marks.u64);
194
195 /* Use the actual queue 0 counter, not the average */
196 red_param.u64 = 0;
197 red_param.s.prb_con =
198 (255ul << 24) / (red_marks.s.pass - red_marks.s.drop);
199 red_param.s.avg_con = 1;
200 red_param.s.new_con = 255;
201 red_param.s.use_pcnt = 1;
202 cvmx_write_csr(CVMX_IPD_RED_QUEX_PARAM(queue), red_param.u64);
203 return 0;
204 }
205
206 /**
207 * Setup Random Early Drop to automatically begin dropping packets.
208 *
209 * @pass_thresh:
210 * Packets will begin slowly dropping when there are less than
211 * this many packet buffers free in FPA 0.
212 * @drop_thresh:
213 * All incomming packets will be dropped when there are less
214 * than this many free packet buffers in FPA 0.
215 * Returns Zero on success. Negative on failure
216 */
cvmx_helper_setup_red(int pass_thresh,int drop_thresh)217 int cvmx_helper_setup_red(int pass_thresh, int drop_thresh)
218 {
219 union cvmx_ipd_portx_bp_page_cnt page_cnt;
220 union cvmx_ipd_bp_prt_red_end ipd_bp_prt_red_end;
221 union cvmx_ipd_red_port_enable red_port_enable;
222 int queue;
223 int interface;
224 int port;
225
226 /* Disable backpressure based on queued buffers. It needs SW support */
227 page_cnt.u64 = 0;
228 page_cnt.s.bp_enb = 0;
229 page_cnt.s.page_cnt = 100;
230 for (interface = 0; interface < 2; interface++) {
231 for (port = cvmx_helper_get_first_ipd_port(interface);
232 port < cvmx_helper_get_last_ipd_port(interface); port++)
233 cvmx_write_csr(CVMX_IPD_PORTX_BP_PAGE_CNT(port),
234 page_cnt.u64);
235 }
236
237 for (queue = 0; queue < 8; queue++)
238 cvmx_helper_setup_red_queue(queue, pass_thresh, drop_thresh);
239
240 /* Shutoff the dropping based on the per port page count. SW isn't
241 decrementing it right now */
242 ipd_bp_prt_red_end.u64 = 0;
243 ipd_bp_prt_red_end.s.prt_enb = 0;
244 cvmx_write_csr(CVMX_IPD_BP_PRT_RED_END, ipd_bp_prt_red_end.u64);
245
246 red_port_enable.u64 = 0;
247 red_port_enable.s.prt_enb = 0xfffffffffull;
248 red_port_enable.s.avg_dly = 10000;
249 red_port_enable.s.prb_dly = 10000;
250 cvmx_write_csr(CVMX_IPD_RED_PORT_ENABLE, red_port_enable.u64);
251
252 return 0;
253 }
254
255 /**
256 * Setup the common GMX settings that determine the number of
257 * ports. These setting apply to almost all configurations of all
258 * chips.
259 *
260 * @interface: Interface to configure
261 * @num_ports: Number of ports on the interface
262 *
263 * Returns Zero on success, negative on failure
264 */
__cvmx_helper_setup_gmx(int interface,int num_ports)265 int __cvmx_helper_setup_gmx(int interface, int num_ports)
266 {
267 union cvmx_gmxx_tx_prts gmx_tx_prts;
268 union cvmx_gmxx_rx_prts gmx_rx_prts;
269 union cvmx_pko_reg_gmx_port_mode pko_mode;
270 union cvmx_gmxx_txx_thresh gmx_tx_thresh;
271 int index;
272
273 /* Tell GMX the number of TX ports on this interface */
274 gmx_tx_prts.u64 = cvmx_read_csr(CVMX_GMXX_TX_PRTS(interface));
275 gmx_tx_prts.s.prts = num_ports;
276 cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), gmx_tx_prts.u64);
277
278 /* Tell GMX the number of RX ports on this interface. This only
279 ** applies to *GMII and XAUI ports */
280 if (cvmx_helper_interface_get_mode(interface) ==
281 CVMX_HELPER_INTERFACE_MODE_RGMII
282 || cvmx_helper_interface_get_mode(interface) ==
283 CVMX_HELPER_INTERFACE_MODE_SGMII
284 || cvmx_helper_interface_get_mode(interface) ==
285 CVMX_HELPER_INTERFACE_MODE_GMII
286 || cvmx_helper_interface_get_mode(interface) ==
287 CVMX_HELPER_INTERFACE_MODE_XAUI) {
288 if (num_ports > 4) {
289 cvmx_dprintf("__cvmx_helper_setup_gmx: Illegal "
290 "num_ports\n");
291 return -1;
292 }
293
294 gmx_rx_prts.u64 = cvmx_read_csr(CVMX_GMXX_RX_PRTS(interface));
295 gmx_rx_prts.s.prts = num_ports;
296 cvmx_write_csr(CVMX_GMXX_RX_PRTS(interface), gmx_rx_prts.u64);
297 }
298
299 /* Skip setting CVMX_PKO_REG_GMX_PORT_MODE on 30XX, 31XX, and 50XX */
300 if (!OCTEON_IS_MODEL(OCTEON_CN30XX) && !OCTEON_IS_MODEL(OCTEON_CN31XX)
301 && !OCTEON_IS_MODEL(OCTEON_CN50XX)) {
302 /* Tell PKO the number of ports on this interface */
303 pko_mode.u64 = cvmx_read_csr(CVMX_PKO_REG_GMX_PORT_MODE);
304 if (interface == 0) {
305 if (num_ports == 1)
306 pko_mode.s.mode0 = 4;
307 else if (num_ports == 2)
308 pko_mode.s.mode0 = 3;
309 else if (num_ports <= 4)
310 pko_mode.s.mode0 = 2;
311 else if (num_ports <= 8)
312 pko_mode.s.mode0 = 1;
313 else
314 pko_mode.s.mode0 = 0;
315 } else {
316 if (num_ports == 1)
317 pko_mode.s.mode1 = 4;
318 else if (num_ports == 2)
319 pko_mode.s.mode1 = 3;
320 else if (num_ports <= 4)
321 pko_mode.s.mode1 = 2;
322 else if (num_ports <= 8)
323 pko_mode.s.mode1 = 1;
324 else
325 pko_mode.s.mode1 = 0;
326 }
327 cvmx_write_csr(CVMX_PKO_REG_GMX_PORT_MODE, pko_mode.u64);
328 }
329
330 /*
331 * Set GMX to buffer as much data as possible before starting
332 * transmit. This reduces the chances that we have a TX under
333 * run due to memory contention. Any packet that fits entirely
334 * in the GMX FIFO can never have an under run regardless of
335 * memory load.
336 */
337 gmx_tx_thresh.u64 = cvmx_read_csr(CVMX_GMXX_TXX_THRESH(0, interface));
338 if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN31XX)
339 || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
340 /* These chips have a fixed max threshold of 0x40 */
341 gmx_tx_thresh.s.cnt = 0x40;
342 } else {
343 /* Choose the max value for the number of ports */
344 if (num_ports <= 1)
345 gmx_tx_thresh.s.cnt = 0x100 / 1;
346 else if (num_ports == 2)
347 gmx_tx_thresh.s.cnt = 0x100 / 2;
348 else
349 gmx_tx_thresh.s.cnt = 0x100 / 4;
350 }
351 /*
352 * SPI and XAUI can have lots of ports but the GMX hardware
353 * only ever has a max of 4.
354 */
355 if (num_ports > 4)
356 num_ports = 4;
357 for (index = 0; index < num_ports; index++)
358 cvmx_write_csr(CVMX_GMXX_TXX_THRESH(index, interface),
359 gmx_tx_thresh.u64);
360
361 return 0;
362 }
363
364 /**
365 * Returns the IPD/PKO port number for a port on the given
366 * interface.
367 *
368 * @interface: Interface to use
369 * @port: Port on the interface
370 *
371 * Returns IPD/PKO port number
372 */
cvmx_helper_get_ipd_port(int interface,int port)373 int cvmx_helper_get_ipd_port(int interface, int port)
374 {
375 switch (interface) {
376 case 0:
377 return port;
378 case 1:
379 return port + 16;
380 case 2:
381 return port + 32;
382 case 3:
383 return port + 36;
384 }
385 return -1;
386 }
387
388 /**
389 * Returns the interface number for an IPD/PKO port number.
390 *
391 * @ipd_port: IPD/PKO port number
392 *
393 * Returns Interface number
394 */
cvmx_helper_get_interface_num(int ipd_port)395 int cvmx_helper_get_interface_num(int ipd_port)
396 {
397 if (ipd_port < 16)
398 return 0;
399 else if (ipd_port < 32)
400 return 1;
401 else if (ipd_port < 36)
402 return 2;
403 else if (ipd_port < 40)
404 return 3;
405 else
406 cvmx_dprintf("cvmx_helper_get_interface_num: Illegal IPD "
407 "port number\n");
408
409 return -1;
410 }
411
412 /**
413 * Returns the interface index number for an IPD/PKO port
414 * number.
415 *
416 * @ipd_port: IPD/PKO port number
417 *
418 * Returns Interface index number
419 */
cvmx_helper_get_interface_index_num(int ipd_port)420 int cvmx_helper_get_interface_index_num(int ipd_port)
421 {
422 if (ipd_port < 32)
423 return ipd_port & 15;
424 else if (ipd_port < 36)
425 return ipd_port & 3;
426 else if (ipd_port < 40)
427 return ipd_port & 3;
428 else
429 cvmx_dprintf("cvmx_helper_get_interface_index_num: "
430 "Illegal IPD port number\n");
431
432 return -1;
433 }
434