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 *
30 * Interface to the hardware Input Packet Data unit.
31 */
32
33 #ifndef __CVMX_IPD_H__
34 #define __CVMX_IPD_H__
35
36 #include <asm/octeon/octeon-feature.h>
37
38 #include <asm/octeon/cvmx-ipd-defs.h>
39 #include <asm/octeon/cvmx-pip-defs.h>
40
41 enum cvmx_ipd_mode {
42 CVMX_IPD_OPC_MODE_STT = 0LL, /* All blocks DRAM, not cached in L2 */
43 CVMX_IPD_OPC_MODE_STF = 1LL, /* All blocks into L2 */
44 CVMX_IPD_OPC_MODE_STF1_STT = 2LL, /* 1st block L2, rest DRAM */
45 CVMX_IPD_OPC_MODE_STF2_STT = 3LL /* 1st, 2nd blocks L2, rest DRAM */
46 };
47
48 #ifndef CVMX_ENABLE_LEN_M8_FIX
49 #define CVMX_ENABLE_LEN_M8_FIX 0
50 #endif
51
52 /* CSR typedefs have been moved to cvmx-csr-*.h */
53 typedef union cvmx_ipd_1st_mbuff_skip cvmx_ipd_mbuff_first_skip_t;
54 typedef union cvmx_ipd_1st_next_ptr_back cvmx_ipd_first_next_ptr_back_t;
55
56 typedef cvmx_ipd_mbuff_first_skip_t cvmx_ipd_mbuff_not_first_skip_t;
57 typedef cvmx_ipd_first_next_ptr_back_t cvmx_ipd_second_next_ptr_back_t;
58
59 /**
60 * Configure IPD
61 *
62 * @mbuff_size: Packets buffer size in 8 byte words
63 * @first_mbuff_skip:
64 * Number of 8 byte words to skip in the first buffer
65 * @not_first_mbuff_skip:
66 * Number of 8 byte words to skip in each following buffer
67 * @first_back: Must be same as first_mbuff_skip / 128
68 * @second_back:
69 * Must be same as not_first_mbuff_skip / 128
70 * @wqe_fpa_pool:
71 * FPA pool to get work entries from
72 * @cache_mode:
73 * @back_pres_enable_flag:
74 * Enable or disable port back pressure
75 */
cvmx_ipd_config(uint64_t mbuff_size,uint64_t first_mbuff_skip,uint64_t not_first_mbuff_skip,uint64_t first_back,uint64_t second_back,uint64_t wqe_fpa_pool,enum cvmx_ipd_mode cache_mode,uint64_t back_pres_enable_flag)76 static inline void cvmx_ipd_config(uint64_t mbuff_size,
77 uint64_t first_mbuff_skip,
78 uint64_t not_first_mbuff_skip,
79 uint64_t first_back,
80 uint64_t second_back,
81 uint64_t wqe_fpa_pool,
82 enum cvmx_ipd_mode cache_mode,
83 uint64_t back_pres_enable_flag)
84 {
85 cvmx_ipd_mbuff_first_skip_t first_skip;
86 cvmx_ipd_mbuff_not_first_skip_t not_first_skip;
87 union cvmx_ipd_packet_mbuff_size size;
88 cvmx_ipd_first_next_ptr_back_t first_back_struct;
89 cvmx_ipd_second_next_ptr_back_t second_back_struct;
90 union cvmx_ipd_wqe_fpa_queue wqe_pool;
91 union cvmx_ipd_ctl_status ipd_ctl_reg;
92
93 first_skip.u64 = 0;
94 first_skip.s.skip_sz = first_mbuff_skip;
95 cvmx_write_csr(CVMX_IPD_1ST_MBUFF_SKIP, first_skip.u64);
96
97 not_first_skip.u64 = 0;
98 not_first_skip.s.skip_sz = not_first_mbuff_skip;
99 cvmx_write_csr(CVMX_IPD_NOT_1ST_MBUFF_SKIP, not_first_skip.u64);
100
101 size.u64 = 0;
102 size.s.mb_size = mbuff_size;
103 cvmx_write_csr(CVMX_IPD_PACKET_MBUFF_SIZE, size.u64);
104
105 first_back_struct.u64 = 0;
106 first_back_struct.s.back = first_back;
107 cvmx_write_csr(CVMX_IPD_1st_NEXT_PTR_BACK, first_back_struct.u64);
108
109 second_back_struct.u64 = 0;
110 second_back_struct.s.back = second_back;
111 cvmx_write_csr(CVMX_IPD_2nd_NEXT_PTR_BACK, second_back_struct.u64);
112
113 wqe_pool.u64 = 0;
114 wqe_pool.s.wqe_pool = wqe_fpa_pool;
115 cvmx_write_csr(CVMX_IPD_WQE_FPA_QUEUE, wqe_pool.u64);
116
117 ipd_ctl_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
118 ipd_ctl_reg.s.opc_mode = cache_mode;
119 ipd_ctl_reg.s.pbp_en = back_pres_enable_flag;
120 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_reg.u64);
121
122 /* Note: the example RED code that used to be here has been moved to
123 cvmx_helper_setup_red */
124 }
125
126 /**
127 * Enable IPD
128 */
cvmx_ipd_enable(void)129 static inline void cvmx_ipd_enable(void)
130 {
131 union cvmx_ipd_ctl_status ipd_reg;
132 ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
133 if (ipd_reg.s.ipd_en) {
134 cvmx_dprintf
135 ("Warning: Enabling IPD when IPD already enabled.\n");
136 }
137 ipd_reg.s.ipd_en = 1;
138 #if CVMX_ENABLE_LEN_M8_FIX
139 if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
140 ipd_reg.s.len_m8 = TRUE;
141 #endif
142 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
143 }
144
145 /**
146 * Disable IPD
147 */
cvmx_ipd_disable(void)148 static inline void cvmx_ipd_disable(void)
149 {
150 union cvmx_ipd_ctl_status ipd_reg;
151 ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
152 ipd_reg.s.ipd_en = 0;
153 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
154 }
155
156 /**
157 * Supportive function for cvmx_fpa_shutdown_pool.
158 */
cvmx_ipd_free_ptr(void)159 static inline void cvmx_ipd_free_ptr(void)
160 {
161 /* Only CN38XXp{1,2} cannot read pointer out of the IPD */
162 if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1)
163 && !OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
164 int no_wptr = 0;
165 union cvmx_ipd_ptr_count ipd_ptr_count;
166 ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
167
168 /* Handle Work Queue Entry in cn56xx and cn52xx */
169 if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
170 union cvmx_ipd_ctl_status ipd_ctl_status;
171 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
172 if (ipd_ctl_status.s.no_wptr)
173 no_wptr = 1;
174 }
175
176 /* Free the prefetched WQE */
177 if (ipd_ptr_count.s.wqev_cnt) {
178 union cvmx_ipd_wqe_ptr_valid ipd_wqe_ptr_valid;
179 ipd_wqe_ptr_valid.u64 =
180 cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
181 if (no_wptr)
182 cvmx_fpa_free(cvmx_phys_to_ptr
183 ((uint64_t) ipd_wqe_ptr_valid.s.
184 ptr << 7), CVMX_FPA_PACKET_POOL,
185 0);
186 else
187 cvmx_fpa_free(cvmx_phys_to_ptr
188 ((uint64_t) ipd_wqe_ptr_valid.s.
189 ptr << 7), CVMX_FPA_WQE_POOL, 0);
190 }
191
192 /* Free all WQE in the fifo */
193 if (ipd_ptr_count.s.wqe_pcnt) {
194 int i;
195 union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
196 ipd_pwp_ptr_fifo_ctl.u64 =
197 cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
198 for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
199 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
200 ipd_pwp_ptr_fifo_ctl.s.raddr =
201 ipd_pwp_ptr_fifo_ctl.s.max_cnts +
202 (ipd_pwp_ptr_fifo_ctl.s.wraddr +
203 i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
204 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
205 ipd_pwp_ptr_fifo_ctl.u64);
206 ipd_pwp_ptr_fifo_ctl.u64 =
207 cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
208 if (no_wptr)
209 cvmx_fpa_free(cvmx_phys_to_ptr
210 ((uint64_t)
211 ipd_pwp_ptr_fifo_ctl.s.
212 ptr << 7),
213 CVMX_FPA_PACKET_POOL, 0);
214 else
215 cvmx_fpa_free(cvmx_phys_to_ptr
216 ((uint64_t)
217 ipd_pwp_ptr_fifo_ctl.s.
218 ptr << 7),
219 CVMX_FPA_WQE_POOL, 0);
220 }
221 ipd_pwp_ptr_fifo_ctl.s.cena = 1;
222 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
223 ipd_pwp_ptr_fifo_ctl.u64);
224 }
225
226 /* Free the prefetched packet */
227 if (ipd_ptr_count.s.pktv_cnt) {
228 union cvmx_ipd_pkt_ptr_valid ipd_pkt_ptr_valid;
229 ipd_pkt_ptr_valid.u64 =
230 cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
231 cvmx_fpa_free(cvmx_phys_to_ptr
232 (ipd_pkt_ptr_valid.s.ptr << 7),
233 CVMX_FPA_PACKET_POOL, 0);
234 }
235
236 /* Free the per port prefetched packets */
237 if (1) {
238 int i;
239 union cvmx_ipd_prc_port_ptr_fifo_ctl
240 ipd_prc_port_ptr_fifo_ctl;
241 ipd_prc_port_ptr_fifo_ctl.u64 =
242 cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
243
244 for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
245 i++) {
246 ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
247 ipd_prc_port_ptr_fifo_ctl.s.raddr =
248 i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
249 cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
250 ipd_prc_port_ptr_fifo_ctl.u64);
251 ipd_prc_port_ptr_fifo_ctl.u64 =
252 cvmx_read_csr
253 (CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
254 cvmx_fpa_free(cvmx_phys_to_ptr
255 ((uint64_t)
256 ipd_prc_port_ptr_fifo_ctl.s.
257 ptr << 7), CVMX_FPA_PACKET_POOL,
258 0);
259 }
260 ipd_prc_port_ptr_fifo_ctl.s.cena = 1;
261 cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
262 ipd_prc_port_ptr_fifo_ctl.u64);
263 }
264
265 /* Free all packets in the holding fifo */
266 if (ipd_ptr_count.s.pfif_cnt) {
267 int i;
268 union cvmx_ipd_prc_hold_ptr_fifo_ctl
269 ipd_prc_hold_ptr_fifo_ctl;
270
271 ipd_prc_hold_ptr_fifo_ctl.u64 =
272 cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
273
274 for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
275 ipd_prc_hold_ptr_fifo_ctl.s.cena = 0;
276 ipd_prc_hold_ptr_fifo_ctl.s.raddr =
277 (ipd_prc_hold_ptr_fifo_ctl.s.praddr +
278 i) % ipd_prc_hold_ptr_fifo_ctl.s.max_pkt;
279 cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
280 ipd_prc_hold_ptr_fifo_ctl.u64);
281 ipd_prc_hold_ptr_fifo_ctl.u64 =
282 cvmx_read_csr
283 (CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
284 cvmx_fpa_free(cvmx_phys_to_ptr
285 ((uint64_t)
286 ipd_prc_hold_ptr_fifo_ctl.s.
287 ptr << 7), CVMX_FPA_PACKET_POOL,
288 0);
289 }
290 ipd_prc_hold_ptr_fifo_ctl.s.cena = 1;
291 cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
292 ipd_prc_hold_ptr_fifo_ctl.u64);
293 }
294
295 /* Free all packets in the fifo */
296 if (ipd_ptr_count.s.pkt_pcnt) {
297 int i;
298 union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
299 ipd_pwp_ptr_fifo_ctl.u64 =
300 cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
301
302 for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
303 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
304 ipd_pwp_ptr_fifo_ctl.s.raddr =
305 (ipd_pwp_ptr_fifo_ctl.s.praddr +
306 i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
307 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
308 ipd_pwp_ptr_fifo_ctl.u64);
309 ipd_pwp_ptr_fifo_ctl.u64 =
310 cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
311 cvmx_fpa_free(cvmx_phys_to_ptr
312 ((uint64_t) ipd_pwp_ptr_fifo_ctl.
313 s.ptr << 7),
314 CVMX_FPA_PACKET_POOL, 0);
315 }
316 ipd_pwp_ptr_fifo_ctl.s.cena = 1;
317 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
318 ipd_pwp_ptr_fifo_ctl.u64);
319 }
320
321 /* Reset the IPD to get all buffers out of it */
322 {
323 union cvmx_ipd_ctl_status ipd_ctl_status;
324 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
325 ipd_ctl_status.s.reset = 1;
326 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
327 }
328
329 /* Reset the PIP */
330 {
331 union cvmx_pip_sft_rst pip_sft_rst;
332 pip_sft_rst.u64 = cvmx_read_csr(CVMX_PIP_SFT_RST);
333 pip_sft_rst.s.rst = 1;
334 cvmx_write_csr(CVMX_PIP_SFT_RST, pip_sft_rst.u64);
335 }
336 }
337 }
338
339 #endif /* __CVMX_IPD_H__ */
340