Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1 | /* |
Jubin John | 05d6ac1 | 2016-02-14 20:22:17 -0800 | [diff] [blame] | 2 | * Copyright(c) 2015, 2016 Intel Corporation. |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 3 | * |
| 4 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 5 | * redistributing this file, you may do so under either license. |
| 6 | * |
| 7 | * GPL LICENSE SUMMARY |
| 8 | * |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of version 2 of the GNU General Public License as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * BSD LICENSE |
| 19 | * |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 20 | * Redistribution and use in source and binary forms, with or without |
| 21 | * modification, are permitted provided that the following conditions |
| 22 | * are met: |
| 23 | * |
| 24 | * - Redistributions of source code must retain the above copyright |
| 25 | * notice, this list of conditions and the following disclaimer. |
| 26 | * - Redistributions in binary form must reproduce the above copyright |
| 27 | * notice, this list of conditions and the following disclaimer in |
| 28 | * the documentation and/or other materials provided with the |
| 29 | * distribution. |
| 30 | * - Neither the name of Intel Corporation nor the names of its |
| 31 | * contributors may be used to endorse or promote products derived |
| 32 | * from this software without specific prior written permission. |
| 33 | * |
| 34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 45 | * |
| 46 | */ |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 47 | |
Jakub Byczkowski | 76ae622 | 2017-08-13 08:08:40 -0700 | [diff] [blame] | 48 | #include <linux/firmware.h> |
| 49 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 50 | #include "hfi.h" |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 51 | #include "efivar.h" |
Dean Luick | e83eba2 | 2016-09-30 04:41:45 -0700 | [diff] [blame] | 52 | #include "eprom.h" |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 53 | |
Jakub Byczkowski | 76ae622 | 2017-08-13 08:08:40 -0700 | [diff] [blame] | 54 | #define DEFAULT_PLATFORM_CONFIG_NAME "hfi1_platform.dat" |
| 55 | |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 56 | static int validate_scratch_checksum(struct hfi1_devdata *dd) |
| 57 | { |
| 58 | u64 checksum = 0, temp_scratch = 0; |
| 59 | int i, j, version; |
| 60 | |
| 61 | temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH); |
| 62 | version = (temp_scratch & BITMAP_VERSION_SMASK) >> BITMAP_VERSION_SHIFT; |
| 63 | |
| 64 | /* Prevent power on default of all zeroes from passing checksum */ |
Jan Sokolowski | c822652 | 2017-07-29 08:43:37 -0700 | [diff] [blame] | 65 | if (!version) { |
| 66 | dd_dev_err(dd, "%s: Config bitmap uninitialized\n", __func__); |
| 67 | dd_dev_err(dd, |
| 68 | "%s: Please update your BIOS to support active channels\n", |
| 69 | __func__); |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 70 | return 0; |
Jan Sokolowski | c822652 | 2017-07-29 08:43:37 -0700 | [diff] [blame] | 71 | } |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * ASIC scratch 0 only contains the checksum and bitmap version as |
| 75 | * fields of interest, both of which are handled separately from the |
| 76 | * loop below, so skip it |
| 77 | */ |
| 78 | checksum += version; |
| 79 | for (i = 1; i < ASIC_NUM_SCRATCH; i++) { |
| 80 | temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH + (8 * i)); |
| 81 | for (j = sizeof(u64); j != 0; j -= 2) { |
| 82 | checksum += (temp_scratch & 0xFFFF); |
| 83 | temp_scratch >>= 16; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | while (checksum >> 16) |
| 88 | checksum = (checksum & CHECKSUM_MASK) + (checksum >> 16); |
| 89 | |
| 90 | temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH); |
| 91 | temp_scratch &= CHECKSUM_SMASK; |
| 92 | temp_scratch >>= CHECKSUM_SHIFT; |
| 93 | |
| 94 | if (checksum + temp_scratch == 0xFFFF) |
| 95 | return 1; |
Jan Sokolowski | c822652 | 2017-07-29 08:43:37 -0700 | [diff] [blame] | 96 | |
| 97 | dd_dev_err(dd, "%s: Configuration bitmap corrupted\n", __func__); |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static void save_platform_config_fields(struct hfi1_devdata *dd) |
| 102 | { |
| 103 | struct hfi1_pportdata *ppd = dd->pport; |
| 104 | u64 temp_scratch = 0, temp_dest = 0; |
| 105 | |
| 106 | temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH_1); |
| 107 | |
| 108 | temp_dest = temp_scratch & |
| 109 | (dd->hfi1_id ? PORT1_PORT_TYPE_SMASK : |
| 110 | PORT0_PORT_TYPE_SMASK); |
| 111 | ppd->port_type = temp_dest >> |
| 112 | (dd->hfi1_id ? PORT1_PORT_TYPE_SHIFT : |
| 113 | PORT0_PORT_TYPE_SHIFT); |
| 114 | |
| 115 | temp_dest = temp_scratch & |
| 116 | (dd->hfi1_id ? PORT1_LOCAL_ATTEN_SMASK : |
| 117 | PORT0_LOCAL_ATTEN_SMASK); |
| 118 | ppd->local_atten = temp_dest >> |
| 119 | (dd->hfi1_id ? PORT1_LOCAL_ATTEN_SHIFT : |
| 120 | PORT0_LOCAL_ATTEN_SHIFT); |
| 121 | |
| 122 | temp_dest = temp_scratch & |
| 123 | (dd->hfi1_id ? PORT1_REMOTE_ATTEN_SMASK : |
| 124 | PORT0_REMOTE_ATTEN_SMASK); |
| 125 | ppd->remote_atten = temp_dest >> |
| 126 | (dd->hfi1_id ? PORT1_REMOTE_ATTEN_SHIFT : |
| 127 | PORT0_REMOTE_ATTEN_SHIFT); |
| 128 | |
| 129 | temp_dest = temp_scratch & |
| 130 | (dd->hfi1_id ? PORT1_DEFAULT_ATTEN_SMASK : |
| 131 | PORT0_DEFAULT_ATTEN_SMASK); |
| 132 | ppd->default_atten = temp_dest >> |
| 133 | (dd->hfi1_id ? PORT1_DEFAULT_ATTEN_SHIFT : |
| 134 | PORT0_DEFAULT_ATTEN_SHIFT); |
| 135 | |
| 136 | temp_scratch = read_csr(dd, dd->hfi1_id ? ASIC_CFG_SCRATCH_3 : |
| 137 | ASIC_CFG_SCRATCH_2); |
| 138 | |
| 139 | ppd->tx_preset_eq = (temp_scratch & TX_EQ_SMASK) >> TX_EQ_SHIFT; |
| 140 | ppd->tx_preset_noeq = (temp_scratch & TX_NO_EQ_SMASK) >> TX_NO_EQ_SHIFT; |
| 141 | ppd->rx_preset = (temp_scratch & RX_SMASK) >> RX_SHIFT; |
| 142 | |
| 143 | ppd->max_power_class = (temp_scratch & QSFP_MAX_POWER_SMASK) >> |
| 144 | QSFP_MAX_POWER_SHIFT; |
Jakub Byczkowski | 9161860 | 2017-08-13 08:08:34 -0700 | [diff] [blame] | 145 | |
| 146 | ppd->config_from_scratch = true; |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 149 | void get_platform_config(struct hfi1_devdata *dd) |
| 150 | { |
| 151 | int ret = 0; |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 152 | u8 *temp_platform_config = NULL; |
Dean Luick | e83eba2 | 2016-09-30 04:41:45 -0700 | [diff] [blame] | 153 | u32 esize; |
Jakub Byczkowski | 76ae622 | 2017-08-13 08:08:40 -0700 | [diff] [blame] | 154 | const struct firmware *platform_config_file = NULL; |
Dean Luick | e83eba2 | 2016-09-30 04:41:45 -0700 | [diff] [blame] | 155 | |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 156 | if (is_integrated(dd)) { |
| 157 | if (validate_scratch_checksum(dd)) { |
| 158 | save_platform_config_fields(dd); |
| 159 | return; |
| 160 | } |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 161 | } else { |
| 162 | ret = eprom_read_platform_config(dd, |
| 163 | (void **)&temp_platform_config, |
| 164 | &esize); |
| 165 | if (!ret) { |
| 166 | /* success */ |
| 167 | dd->platform_config.data = temp_platform_config; |
| 168 | dd->platform_config.size = esize; |
| 169 | return; |
| 170 | } |
Dean Luick | e83eba2 | 2016-09-30 04:41:45 -0700 | [diff] [blame] | 171 | } |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 172 | dd_dev_err(dd, |
| 173 | "%s: Failed to get platform config, falling back to sub-optimal default file\n", |
| 174 | __func__); |
Jakub Byczkowski | 76ae622 | 2017-08-13 08:08:40 -0700 | [diff] [blame] | 175 | |
| 176 | ret = request_firmware(&platform_config_file, |
| 177 | DEFAULT_PLATFORM_CONFIG_NAME, |
| 178 | &dd->pcidev->dev); |
| 179 | if (ret) { |
| 180 | dd_dev_err(dd, |
| 181 | "%s: No default platform config file found\n", |
| 182 | __func__); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * Allocate separate memory block to store data and free firmware |
| 188 | * structure. This allows free_platform_config to treat EPROM and |
| 189 | * fallback configs in the same manner. |
| 190 | */ |
| 191 | dd->platform_config.data = kmemdup(platform_config_file->data, |
| 192 | platform_config_file->size, |
| 193 | GFP_KERNEL); |
| 194 | dd->platform_config.size = platform_config_file->size; |
| 195 | release_firmware(platform_config_file); |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | void free_platform_config(struct hfi1_devdata *dd) |
| 199 | { |
Jakub Byczkowski | 76ae622 | 2017-08-13 08:08:40 -0700 | [diff] [blame] | 200 | /* Release memory allocated for eprom or fallback file read. */ |
| 201 | kfree(dd->platform_config.data); |
Sebastian Sanchez | e9777ad | 2018-05-01 05:36:06 -0700 | [diff] [blame] | 202 | dd->platform_config.data = NULL; |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 203 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 204 | |
Easwar Hariharan | 9775a99 | 2016-05-12 10:22:39 -0700 | [diff] [blame] | 205 | void get_port_type(struct hfi1_pportdata *ppd) |
| 206 | { |
| 207 | int ret; |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 208 | u32 temp; |
Easwar Hariharan | 9775a99 | 2016-05-12 10:22:39 -0700 | [diff] [blame] | 209 | |
| 210 | ret = get_platform_config_field(ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 211 | PORT_TABLE_PORT_TYPE, &temp, |
Easwar Hariharan | 9775a99 | 2016-05-12 10:22:39 -0700 | [diff] [blame] | 212 | 4); |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 213 | if (ret) { |
Easwar Hariharan | 9775a99 | 2016-05-12 10:22:39 -0700 | [diff] [blame] | 214 | ppd->port_type = PORT_TYPE_UNKNOWN; |
Easwar Hariharan | fe4d924 | 2016-10-17 04:19:47 -0700 | [diff] [blame] | 215 | return; |
| 216 | } |
| 217 | ppd->port_type = temp; |
Easwar Hariharan | 9775a99 | 2016-05-12 10:22:39 -0700 | [diff] [blame] | 218 | } |
| 219 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 220 | int set_qsfp_tx(struct hfi1_pportdata *ppd, int on) |
| 221 | { |
| 222 | u8 tx_ctrl_byte = on ? 0x0 : 0xF; |
| 223 | int ret = 0; |
| 224 | |
| 225 | ret = qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_TX_CTRL_BYTE_OFFS, |
| 226 | &tx_ctrl_byte, 1); |
| 227 | /* we expected 1, so consider 0 an error */ |
| 228 | if (ret == 0) |
| 229 | ret = -EIO; |
| 230 | else if (ret == 1) |
| 231 | ret = 0; |
| 232 | return ret; |
| 233 | } |
| 234 | |
| 235 | static int qual_power(struct hfi1_pportdata *ppd) |
| 236 | { |
| 237 | u32 cable_power_class = 0, power_class_max = 0; |
| 238 | u8 *cache = ppd->qsfp_info.cache; |
| 239 | int ret = 0; |
| 240 | |
| 241 | ret = get_platform_config_field( |
| 242 | ppd->dd, PLATFORM_CONFIG_SYSTEM_TABLE, 0, |
| 243 | SYSTEM_TABLE_QSFP_POWER_CLASS_MAX, &power_class_max, 4); |
| 244 | if (ret) |
| 245 | return ret; |
| 246 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 247 | cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 248 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 249 | if (cable_power_class > power_class_max) |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 250 | ppd->offline_disabled_reason = |
| 251 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 252 | |
| 253 | if (ppd->offline_disabled_reason == |
| 254 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY)) { |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 255 | dd_dev_err( |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 256 | ppd->dd, |
| 257 | "%s: Port disabled due to system power restrictions\n", |
| 258 | __func__); |
| 259 | ret = -EPERM; |
| 260 | } |
| 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | static int qual_bitrate(struct hfi1_pportdata *ppd) |
| 265 | { |
| 266 | u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; |
| 267 | u8 *cache = ppd->qsfp_info.cache; |
| 268 | |
| 269 | if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G) && |
| 270 | cache[QSFP_NOM_BIT_RATE_250_OFFS] < 0x64) |
| 271 | ppd->offline_disabled_reason = |
| 272 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY); |
| 273 | |
| 274 | if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G) && |
| 275 | cache[QSFP_NOM_BIT_RATE_100_OFFS] < 0x7D) |
| 276 | ppd->offline_disabled_reason = |
| 277 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY); |
| 278 | |
| 279 | if (ppd->offline_disabled_reason == |
| 280 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY)) { |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 281 | dd_dev_err( |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 282 | ppd->dd, |
| 283 | "%s: Cable failed bitrate check, disabling port\n", |
| 284 | __func__); |
| 285 | return -EPERM; |
| 286 | } |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static int set_qsfp_high_power(struct hfi1_pportdata *ppd) |
| 291 | { |
| 292 | u8 cable_power_class = 0, power_ctrl_byte = 0; |
| 293 | u8 *cache = ppd->qsfp_info.cache; |
| 294 | int ret; |
| 295 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 296 | cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 297 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 298 | if (cable_power_class > QSFP_POWER_CLASS_1) { |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 299 | power_ctrl_byte = cache[QSFP_PWR_CTRL_BYTE_OFFS]; |
| 300 | |
| 301 | power_ctrl_byte |= 1; |
| 302 | power_ctrl_byte &= ~(0x2); |
| 303 | |
| 304 | ret = qsfp_write(ppd, ppd->dd->hfi1_id, |
| 305 | QSFP_PWR_CTRL_BYTE_OFFS, |
| 306 | &power_ctrl_byte, 1); |
| 307 | if (ret != 1) |
| 308 | return -EIO; |
| 309 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 310 | if (cable_power_class > QSFP_POWER_CLASS_4) { |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 311 | power_ctrl_byte |= (1 << 2); |
| 312 | ret = qsfp_write(ppd, ppd->dd->hfi1_id, |
| 313 | QSFP_PWR_CTRL_BYTE_OFFS, |
| 314 | &power_ctrl_byte, 1); |
| 315 | if (ret != 1) |
| 316 | return -EIO; |
| 317 | } |
| 318 | |
| 319 | /* SFF 8679 rev 1.7 LPMode Deassert time */ |
| 320 | msleep(300); |
| 321 | } |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | static void apply_rx_cdr(struct hfi1_pportdata *ppd, |
| 326 | u32 rx_preset_index, |
| 327 | u8 *cdr_ctrl_byte) |
| 328 | { |
| 329 | u32 rx_preset; |
| 330 | u8 *cache = ppd->qsfp_info.cache; |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 331 | int cable_power_class; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 332 | |
| 333 | if (!((cache[QSFP_MOD_PWR_OFFS] & 0x4) && |
| 334 | (cache[QSFP_CDR_INFO_OFFS] & 0x40))) |
| 335 | return; |
| 336 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 337 | /* RX CDR present, bypass supported */ |
| 338 | cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]); |
| 339 | |
| 340 | if (cable_power_class <= QSFP_POWER_CLASS_3) { |
| 341 | /* Power class <= 3, ignore config & turn RX CDR on */ |
| 342 | *cdr_ctrl_byte |= 0xF; |
| 343 | return; |
| 344 | } |
| 345 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 346 | get_platform_config_field( |
| 347 | ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 348 | rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR_APPLY, |
| 349 | &rx_preset, 4); |
| 350 | |
| 351 | if (!rx_preset) { |
| 352 | dd_dev_info( |
| 353 | ppd->dd, |
| 354 | "%s: RX_CDR_APPLY is set to disabled\n", |
| 355 | __func__); |
| 356 | return; |
| 357 | } |
| 358 | get_platform_config_field( |
| 359 | ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 360 | rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR, |
| 361 | &rx_preset, 4); |
| 362 | |
| 363 | /* Expand cdr setting to all 4 lanes */ |
| 364 | rx_preset = (rx_preset | (rx_preset << 1) | |
| 365 | (rx_preset << 2) | (rx_preset << 3)); |
| 366 | |
| 367 | if (rx_preset) { |
| 368 | *cdr_ctrl_byte |= rx_preset; |
| 369 | } else { |
| 370 | *cdr_ctrl_byte &= rx_preset; |
| 371 | /* Preserve current TX CDR status */ |
| 372 | *cdr_ctrl_byte |= (cache[QSFP_CDR_CTRL_BYTE_OFFS] & 0xF0); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | static void apply_tx_cdr(struct hfi1_pportdata *ppd, |
| 377 | u32 tx_preset_index, |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 378 | u8 *cdr_ctrl_byte) |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 379 | { |
| 380 | u32 tx_preset; |
| 381 | u8 *cache = ppd->qsfp_info.cache; |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 382 | int cable_power_class; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 383 | |
| 384 | if (!((cache[QSFP_MOD_PWR_OFFS] & 0x8) && |
| 385 | (cache[QSFP_CDR_INFO_OFFS] & 0x80))) |
| 386 | return; |
| 387 | |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 388 | /* TX CDR present, bypass supported */ |
| 389 | cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]); |
| 390 | |
| 391 | if (cable_power_class <= QSFP_POWER_CLASS_3) { |
| 392 | /* Power class <= 3, ignore config & turn TX CDR on */ |
| 393 | *cdr_ctrl_byte |= 0xF0; |
| 394 | return; |
| 395 | } |
| 396 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 397 | get_platform_config_field( |
| 398 | ppd->dd, |
| 399 | PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index, |
| 400 | TX_PRESET_TABLE_QSFP_TX_CDR_APPLY, &tx_preset, 4); |
| 401 | |
| 402 | if (!tx_preset) { |
| 403 | dd_dev_info( |
| 404 | ppd->dd, |
| 405 | "%s: TX_CDR_APPLY is set to disabled\n", |
| 406 | __func__); |
| 407 | return; |
| 408 | } |
| 409 | get_platform_config_field( |
| 410 | ppd->dd, |
| 411 | PLATFORM_CONFIG_TX_PRESET_TABLE, |
| 412 | tx_preset_index, |
| 413 | TX_PRESET_TABLE_QSFP_TX_CDR, &tx_preset, 4); |
| 414 | |
| 415 | /* Expand cdr setting to all 4 lanes */ |
| 416 | tx_preset = (tx_preset | (tx_preset << 1) | |
| 417 | (tx_preset << 2) | (tx_preset << 3)); |
| 418 | |
| 419 | if (tx_preset) |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 420 | *cdr_ctrl_byte |= (tx_preset << 4); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 421 | else |
| 422 | /* Preserve current/determined RX CDR status */ |
Easwar Hariharan | 145dd2b | 2016-04-12 11:25:31 -0700 | [diff] [blame] | 423 | *cdr_ctrl_byte &= ((tx_preset << 4) | 0xF); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | static void apply_cdr_settings( |
| 427 | struct hfi1_pportdata *ppd, u32 rx_preset_index, |
| 428 | u32 tx_preset_index) |
| 429 | { |
| 430 | u8 *cache = ppd->qsfp_info.cache; |
| 431 | u8 cdr_ctrl_byte = cache[QSFP_CDR_CTRL_BYTE_OFFS]; |
| 432 | |
| 433 | apply_rx_cdr(ppd, rx_preset_index, &cdr_ctrl_byte); |
| 434 | |
| 435 | apply_tx_cdr(ppd, tx_preset_index, &cdr_ctrl_byte); |
| 436 | |
| 437 | qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_CDR_CTRL_BYTE_OFFS, |
| 438 | &cdr_ctrl_byte, 1); |
| 439 | } |
| 440 | |
| 441 | static void apply_tx_eq_auto(struct hfi1_pportdata *ppd) |
| 442 | { |
| 443 | u8 *cache = ppd->qsfp_info.cache; |
| 444 | u8 tx_eq; |
| 445 | |
| 446 | if (!(cache[QSFP_EQ_INFO_OFFS] & 0x8)) |
| 447 | return; |
| 448 | /* Disable adaptive TX EQ if present */ |
| 449 | tx_eq = cache[(128 * 3) + 241]; |
| 450 | tx_eq &= 0xF0; |
| 451 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 241, &tx_eq, 1); |
| 452 | } |
| 453 | |
| 454 | static void apply_tx_eq_prog(struct hfi1_pportdata *ppd, u32 tx_preset_index) |
| 455 | { |
| 456 | u8 *cache = ppd->qsfp_info.cache; |
| 457 | u32 tx_preset; |
| 458 | u8 tx_eq; |
| 459 | |
| 460 | if (!(cache[QSFP_EQ_INFO_OFFS] & 0x4)) |
| 461 | return; |
| 462 | |
| 463 | get_platform_config_field( |
| 464 | ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, |
| 465 | tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ_APPLY, |
| 466 | &tx_preset, 4); |
| 467 | if (!tx_preset) { |
| 468 | dd_dev_info( |
| 469 | ppd->dd, |
| 470 | "%s: TX_EQ_APPLY is set to disabled\n", |
| 471 | __func__); |
| 472 | return; |
| 473 | } |
| 474 | get_platform_config_field( |
| 475 | ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, |
| 476 | tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ, |
| 477 | &tx_preset, 4); |
| 478 | |
| 479 | if (((cache[(128 * 3) + 224] & 0xF0) >> 4) < tx_preset) { |
| 480 | dd_dev_info( |
| 481 | ppd->dd, |
| 482 | "%s: TX EQ %x unsupported\n", |
| 483 | __func__, tx_preset); |
| 484 | |
| 485 | dd_dev_info( |
| 486 | ppd->dd, |
| 487 | "%s: Applying EQ %x\n", |
| 488 | __func__, cache[608] & 0xF0); |
| 489 | |
| 490 | tx_preset = (cache[608] & 0xF0) >> 4; |
| 491 | } |
| 492 | |
| 493 | tx_eq = tx_preset | (tx_preset << 4); |
| 494 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 234, &tx_eq, 1); |
| 495 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 235, &tx_eq, 1); |
| 496 | } |
| 497 | |
| 498 | static void apply_rx_eq_emp(struct hfi1_pportdata *ppd, u32 rx_preset_index) |
| 499 | { |
| 500 | u32 rx_preset; |
| 501 | u8 rx_eq, *cache = ppd->qsfp_info.cache; |
| 502 | |
| 503 | if (!(cache[QSFP_EQ_INFO_OFFS] & 0x2)) |
| 504 | return; |
| 505 | get_platform_config_field( |
| 506 | ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 507 | rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP_APPLY, |
| 508 | &rx_preset, 4); |
| 509 | |
| 510 | if (!rx_preset) { |
| 511 | dd_dev_info( |
| 512 | ppd->dd, |
| 513 | "%s: RX_EMP_APPLY is set to disabled\n", |
| 514 | __func__); |
| 515 | return; |
| 516 | } |
| 517 | get_platform_config_field( |
| 518 | ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 519 | rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP, |
| 520 | &rx_preset, 4); |
| 521 | |
| 522 | if ((cache[(128 * 3) + 224] & 0xF) < rx_preset) { |
| 523 | dd_dev_info( |
| 524 | ppd->dd, |
| 525 | "%s: Requested RX EMP %x\n", |
| 526 | __func__, rx_preset); |
| 527 | |
| 528 | dd_dev_info( |
| 529 | ppd->dd, |
| 530 | "%s: Applying supported EMP %x\n", |
| 531 | __func__, cache[608] & 0xF); |
| 532 | |
| 533 | rx_preset = cache[608] & 0xF; |
| 534 | } |
| 535 | |
| 536 | rx_eq = rx_preset | (rx_preset << 4); |
| 537 | |
| 538 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 236, &rx_eq, 1); |
| 539 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 237, &rx_eq, 1); |
| 540 | } |
| 541 | |
| 542 | static void apply_eq_settings(struct hfi1_pportdata *ppd, |
| 543 | u32 rx_preset_index, u32 tx_preset_index) |
| 544 | { |
| 545 | u8 *cache = ppd->qsfp_info.cache; |
| 546 | |
| 547 | /* no point going on w/o a page 3 */ |
| 548 | if (cache[2] & 4) { |
| 549 | dd_dev_info(ppd->dd, |
| 550 | "%s: Upper page 03 not present\n", |
| 551 | __func__); |
| 552 | return; |
| 553 | } |
| 554 | |
| 555 | apply_tx_eq_auto(ppd); |
| 556 | |
| 557 | apply_tx_eq_prog(ppd, tx_preset_index); |
| 558 | |
| 559 | apply_rx_eq_emp(ppd, rx_preset_index); |
| 560 | } |
| 561 | |
| 562 | static void apply_rx_amplitude_settings( |
| 563 | struct hfi1_pportdata *ppd, u32 rx_preset_index, |
| 564 | u32 tx_preset_index) |
| 565 | { |
| 566 | u32 rx_preset; |
| 567 | u8 rx_amp = 0, i = 0, preferred = 0, *cache = ppd->qsfp_info.cache; |
| 568 | |
| 569 | /* no point going on w/o a page 3 */ |
| 570 | if (cache[2] & 4) { |
| 571 | dd_dev_info(ppd->dd, |
| 572 | "%s: Upper page 03 not present\n", |
| 573 | __func__); |
| 574 | return; |
| 575 | } |
| 576 | if (!(cache[QSFP_EQ_INFO_OFFS] & 0x1)) { |
| 577 | dd_dev_info(ppd->dd, |
| 578 | "%s: RX_AMP_APPLY is set to disabled\n", |
| 579 | __func__); |
| 580 | return; |
| 581 | } |
| 582 | |
| 583 | get_platform_config_field(ppd->dd, |
| 584 | PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 585 | rx_preset_index, |
| 586 | RX_PRESET_TABLE_QSFP_RX_AMP_APPLY, |
| 587 | &rx_preset, 4); |
| 588 | |
| 589 | if (!rx_preset) { |
| 590 | dd_dev_info(ppd->dd, |
| 591 | "%s: RX_AMP_APPLY is set to disabled\n", |
| 592 | __func__); |
| 593 | return; |
| 594 | } |
| 595 | get_platform_config_field(ppd->dd, |
| 596 | PLATFORM_CONFIG_RX_PRESET_TABLE, |
| 597 | rx_preset_index, |
| 598 | RX_PRESET_TABLE_QSFP_RX_AMP, |
| 599 | &rx_preset, 4); |
| 600 | |
| 601 | dd_dev_info(ppd->dd, |
| 602 | "%s: Requested RX AMP %x\n", |
| 603 | __func__, |
| 604 | rx_preset); |
| 605 | |
| 606 | for (i = 0; i < 4; i++) { |
| 607 | if (cache[(128 * 3) + 225] & (1 << i)) { |
| 608 | preferred = i; |
| 609 | if (preferred == rx_preset) |
| 610 | break; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * Verify that preferred RX amplitude is not just a |
| 616 | * fall through of the default |
| 617 | */ |
| 618 | if (!preferred && !(cache[(128 * 3) + 225] & 0x1)) { |
| 619 | dd_dev_info(ppd->dd, "No supported RX AMP, not applying\n"); |
| 620 | return; |
| 621 | } |
| 622 | |
| 623 | dd_dev_info(ppd->dd, |
| 624 | "%s: Applying RX AMP %x\n", __func__, preferred); |
| 625 | |
| 626 | rx_amp = preferred | (preferred << 4); |
| 627 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 238, &rx_amp, 1); |
| 628 | qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 239, &rx_amp, 1); |
| 629 | } |
| 630 | |
| 631 | #define OPA_INVALID_INDEX 0xFFF |
| 632 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 633 | static void apply_tx_lanes(struct hfi1_pportdata *ppd, u8 field_id, |
| 634 | u32 config_data, const char *message) |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 635 | { |
| 636 | u8 i; |
| 637 | int ret = HCMD_SUCCESS; |
| 638 | |
| 639 | for (i = 0; i < 4; i++) { |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 640 | ret = load_8051_config(ppd->dd, field_id, i, config_data); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 641 | if (ret != HCMD_SUCCESS) { |
| 642 | dd_dev_err( |
| 643 | ppd->dd, |
| 644 | "%s: %s for lane %u failed\n", |
| 645 | message, __func__, i); |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
Dean Luick | 5213006 | 2016-12-07 19:33:13 -0800 | [diff] [blame] | 650 | /* |
| 651 | * Return a special SerDes setting for low power AOC cables. The power class |
| 652 | * threshold and setting being used were all found by empirical testing. |
| 653 | * |
| 654 | * Summary of the logic: |
| 655 | * |
| 656 | * if (QSFP and QSFP_TYPE == AOC and QSFP_POWER_CLASS < 4) |
| 657 | * return 0xe |
| 658 | * return 0; // leave at default |
| 659 | */ |
| 660 | static u8 aoc_low_power_setting(struct hfi1_pportdata *ppd) |
| 661 | { |
| 662 | u8 *cache = ppd->qsfp_info.cache; |
| 663 | int power_class; |
| 664 | |
| 665 | /* QSFP only */ |
| 666 | if (ppd->port_type != PORT_TYPE_QSFP) |
| 667 | return 0; /* leave at default */ |
| 668 | |
| 669 | /* active optical cables only */ |
| 670 | switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) { |
| 671 | case 0x0 ... 0x9: /* fallthrough */ |
| 672 | case 0xC: /* fallthrough */ |
| 673 | case 0xE: |
| 674 | /* active AOC */ |
| 675 | power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]); |
| 676 | if (power_class < QSFP_POWER_CLASS_4) |
| 677 | return 0xe; |
| 678 | } |
| 679 | return 0; /* leave at default */ |
| 680 | } |
| 681 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 682 | static void apply_tunings( |
| 683 | struct hfi1_pportdata *ppd, u32 tx_preset_index, |
| 684 | u8 tuning_method, u32 total_atten, u8 limiting_active) |
| 685 | { |
| 686 | int ret = 0; |
| 687 | u32 config_data = 0, tx_preset = 0; |
| 688 | u8 precur = 0, attn = 0, postcur = 0, external_device_config = 0; |
| 689 | u8 *cache = ppd->qsfp_info.cache; |
| 690 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 691 | /* Pass tuning method to 8051 */ |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 692 | read_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG, |
| 693 | &config_data); |
Dean Luick | f6de3d3 | 2016-05-24 12:51:00 -0700 | [diff] [blame] | 694 | config_data &= ~(0xff << TUNING_METHOD_SHIFT); |
| 695 | config_data |= ((u32)tuning_method << TUNING_METHOD_SHIFT); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 696 | ret = load_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG, |
| 697 | config_data); |
| 698 | if (ret != HCMD_SUCCESS) |
| 699 | dd_dev_err(ppd->dd, "%s: Failed to set tuning method\n", |
| 700 | __func__); |
| 701 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 702 | /* Set same channel loss for both TX and RX */ |
| 703 | config_data = 0 | (total_atten << 16) | (total_atten << 24); |
| 704 | apply_tx_lanes(ppd, CHANNEL_LOSS_SETTINGS, config_data, |
| 705 | "Setting channel loss"); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 706 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 707 | /* Inform 8051 of cable capabilities */ |
| 708 | if (ppd->qsfp_info.cache_valid) { |
| 709 | external_device_config = |
| 710 | ((cache[QSFP_MOD_PWR_OFFS] & 0x4) << 3) | |
| 711 | ((cache[QSFP_MOD_PWR_OFFS] & 0x8) << 2) | |
| 712 | ((cache[QSFP_EQ_INFO_OFFS] & 0x2) << 1) | |
| 713 | (cache[QSFP_EQ_INFO_OFFS] & 0x4); |
| 714 | ret = read_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS, |
| 715 | GENERAL_CONFIG, &config_data); |
| 716 | /* Clear, then set the external device config field */ |
Easwar Hariharan | 27a340f | 2016-05-12 10:22:45 -0700 | [diff] [blame] | 717 | config_data &= ~(u32)0xFF; |
| 718 | config_data |= external_device_config; |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 719 | ret = load_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS, |
| 720 | GENERAL_CONFIG, config_data); |
| 721 | if (ret != HCMD_SUCCESS) |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 722 | dd_dev_err(ppd->dd, |
| 723 | "%s: Failed set ext device config params\n", |
| 724 | __func__); |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 725 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 726 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 727 | if (tx_preset_index == OPA_INVALID_INDEX) { |
| 728 | if (ppd->port_type == PORT_TYPE_QSFP && limiting_active) |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 729 | dd_dev_err(ppd->dd, "%s: Invalid Tx preset index\n", |
| 730 | __func__); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 731 | return; |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 732 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 733 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 734 | /* Following for limiting active channels only */ |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 735 | get_platform_config_field( |
| 736 | ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index, |
| 737 | TX_PRESET_TABLE_PRECUR, &tx_preset, 4); |
| 738 | precur = tx_preset; |
| 739 | |
| 740 | get_platform_config_field( |
| 741 | ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, |
| 742 | tx_preset_index, TX_PRESET_TABLE_ATTN, &tx_preset, 4); |
| 743 | attn = tx_preset; |
| 744 | |
| 745 | get_platform_config_field( |
| 746 | ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, |
| 747 | tx_preset_index, TX_PRESET_TABLE_POSTCUR, &tx_preset, 4); |
| 748 | postcur = tx_preset; |
| 749 | |
Dean Luick | 5213006 | 2016-12-07 19:33:13 -0800 | [diff] [blame] | 750 | /* |
| 751 | * NOTES: |
| 752 | * o The aoc_low_power_setting is applied to all lanes even |
| 753 | * though only lane 0's value is examined by the firmware. |
| 754 | * o A lingering low power setting after a cable swap does |
| 755 | * not occur. On cable unplug the 8051 is reset and |
| 756 | * restarted on cable insert. This resets all settings to |
| 757 | * their default, erasing any previous low power setting. |
| 758 | */ |
| 759 | config_data = precur | (attn << 8) | (postcur << 16) | |
| 760 | (aoc_low_power_setting(ppd) << 24); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 761 | |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 762 | apply_tx_lanes(ppd, TX_EQ_SETTINGS, config_data, |
| 763 | "Applying TX settings"); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 764 | } |
| 765 | |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 766 | /* Must be holding the QSFP i2c resource */ |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 767 | static int tune_active_qsfp(struct hfi1_pportdata *ppd, u32 *ptr_tx_preset, |
| 768 | u32 *ptr_rx_preset, u32 *ptr_total_atten) |
| 769 | { |
Dean Luick | 765a6fa | 2016-03-05 08:50:06 -0800 | [diff] [blame] | 770 | int ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 771 | u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; |
| 772 | u8 *cache = ppd->qsfp_info.cache; |
| 773 | |
| 774 | ppd->qsfp_info.limiting_active = 1; |
| 775 | |
| 776 | ret = set_qsfp_tx(ppd, 0); |
| 777 | if (ret) |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 778 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 779 | |
| 780 | ret = qual_power(ppd); |
| 781 | if (ret) |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 782 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 783 | |
| 784 | ret = qual_bitrate(ppd); |
| 785 | if (ret) |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 786 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 787 | |
Easwar Hariharan | b5e7101 | 2016-07-25 13:40:03 -0700 | [diff] [blame] | 788 | /* |
| 789 | * We'll change the QSFP memory contents from here on out, thus we set a |
| 790 | * flag here to remind ourselves to reset the QSFP module. This prevents |
| 791 | * reuse of stale settings established in our previous pass through. |
| 792 | */ |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 793 | if (ppd->qsfp_info.reset_needed) { |
Sebastian Sanchez | 30e1052 | 2017-09-26 06:06:03 -0700 | [diff] [blame] | 794 | ret = reset_qsfp(ppd); |
| 795 | if (ret) |
| 796 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 797 | refresh_qsfp_cache(ppd, &ppd->qsfp_info); |
| 798 | } else { |
| 799 | ppd->qsfp_info.reset_needed = 1; |
| 800 | } |
| 801 | |
| 802 | ret = set_qsfp_high_power(ppd); |
| 803 | if (ret) |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 804 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 805 | |
| 806 | if (cache[QSFP_EQ_INFO_OFFS] & 0x4) { |
| 807 | ret = get_platform_config_field( |
| 808 | ppd->dd, |
| 809 | PLATFORM_CONFIG_PORT_TABLE, 0, |
| 810 | PORT_TABLE_TX_PRESET_IDX_ACTIVE_EQ, |
| 811 | ptr_tx_preset, 4); |
| 812 | if (ret) { |
| 813 | *ptr_tx_preset = OPA_INVALID_INDEX; |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 814 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 815 | } |
| 816 | } else { |
| 817 | ret = get_platform_config_field( |
| 818 | ppd->dd, |
| 819 | PLATFORM_CONFIG_PORT_TABLE, 0, |
| 820 | PORT_TABLE_TX_PRESET_IDX_ACTIVE_NO_EQ, |
| 821 | ptr_tx_preset, 4); |
| 822 | if (ret) { |
| 823 | *ptr_tx_preset = OPA_INVALID_INDEX; |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 824 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 825 | } |
| 826 | } |
| 827 | |
| 828 | ret = get_platform_config_field( |
| 829 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 830 | PORT_TABLE_RX_PRESET_IDX, ptr_rx_preset, 4); |
| 831 | if (ret) { |
| 832 | *ptr_rx_preset = OPA_INVALID_INDEX; |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 833 | return ret; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G)) |
| 837 | get_platform_config_field( |
| 838 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 839 | PORT_TABLE_LOCAL_ATTEN_25G, ptr_total_atten, 4); |
| 840 | else if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G)) |
| 841 | get_platform_config_field( |
| 842 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 843 | PORT_TABLE_LOCAL_ATTEN_12G, ptr_total_atten, 4); |
| 844 | |
| 845 | apply_cdr_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); |
| 846 | |
| 847 | apply_eq_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); |
| 848 | |
| 849 | apply_rx_amplitude_settings(ppd, *ptr_rx_preset, *ptr_tx_preset); |
| 850 | |
| 851 | ret = set_qsfp_tx(ppd, 1); |
Dean Luick | 765a6fa | 2016-03-05 08:50:06 -0800 | [diff] [blame] | 852 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 853 | return ret; |
| 854 | } |
| 855 | |
| 856 | static int tune_qsfp(struct hfi1_pportdata *ppd, |
| 857 | u32 *ptr_tx_preset, u32 *ptr_rx_preset, |
| 858 | u8 *ptr_tuning_method, u32 *ptr_total_atten) |
| 859 | { |
| 860 | u32 cable_atten = 0, remote_atten = 0, platform_atten = 0; |
| 861 | u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled; |
| 862 | int ret = 0; |
| 863 | u8 *cache = ppd->qsfp_info.cache; |
| 864 | |
| 865 | switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) { |
| 866 | case 0xA ... 0xB: |
| 867 | ret = get_platform_config_field( |
| 868 | ppd->dd, |
| 869 | PLATFORM_CONFIG_PORT_TABLE, 0, |
| 870 | PORT_TABLE_LOCAL_ATTEN_25G, |
| 871 | &platform_atten, 4); |
| 872 | if (ret) |
| 873 | return ret; |
| 874 | |
| 875 | if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G)) |
| 876 | cable_atten = cache[QSFP_CU_ATTEN_12G_OFFS]; |
| 877 | else if ((lss & OPA_LINK_SPEED_12_5G) && |
| 878 | (lse & OPA_LINK_SPEED_12_5G)) |
| 879 | cable_atten = cache[QSFP_CU_ATTEN_7G_OFFS]; |
| 880 | |
| 881 | /* Fallback to configured attenuation if cable memory is bad */ |
| 882 | if (cable_atten == 0 || cable_atten > 36) { |
| 883 | ret = get_platform_config_field( |
| 884 | ppd->dd, |
| 885 | PLATFORM_CONFIG_SYSTEM_TABLE, 0, |
| 886 | SYSTEM_TABLE_QSFP_ATTENUATION_DEFAULT_25G, |
| 887 | &cable_atten, 4); |
| 888 | if (ret) |
| 889 | return ret; |
| 890 | } |
| 891 | |
| 892 | ret = get_platform_config_field( |
| 893 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 894 | PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4); |
| 895 | if (ret) |
| 896 | return ret; |
| 897 | |
| 898 | *ptr_total_atten = platform_atten + cable_atten + remote_atten; |
| 899 | |
| 900 | *ptr_tuning_method = OPA_PASSIVE_TUNING; |
| 901 | break; |
| 902 | case 0x0 ... 0x9: /* fallthrough */ |
| 903 | case 0xC: /* fallthrough */ |
| 904 | case 0xE: |
| 905 | ret = tune_active_qsfp(ppd, ptr_tx_preset, ptr_rx_preset, |
| 906 | ptr_total_atten); |
| 907 | if (ret) |
| 908 | return ret; |
| 909 | |
| 910 | *ptr_tuning_method = OPA_ACTIVE_TUNING; |
| 911 | break; |
| 912 | case 0xD: /* fallthrough */ |
| 913 | case 0xF: |
| 914 | default: |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 915 | dd_dev_warn(ppd->dd, "%s: Unknown/unsupported cable\n", |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 916 | __func__); |
| 917 | break; |
| 918 | } |
| 919 | return ret; |
| 920 | } |
| 921 | |
| 922 | /* |
| 923 | * This function communicates its success or failure via ppd->driver_link_ready |
| 924 | * Thus, it depends on its association with start_link(...) which checks |
| 925 | * driver_link_ready before proceeding with the link negotiation and |
| 926 | * initialization process. |
| 927 | */ |
| 928 | void tune_serdes(struct hfi1_pportdata *ppd) |
| 929 | { |
| 930 | int ret = 0; |
| 931 | u32 total_atten = 0; |
| 932 | u32 remote_atten = 0, platform_atten = 0; |
| 933 | u32 rx_preset_index, tx_preset_index; |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 934 | u8 tuning_method = 0, limiting_active = 0; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 935 | struct hfi1_devdata *dd = ppd->dd; |
| 936 | |
| 937 | rx_preset_index = OPA_INVALID_INDEX; |
| 938 | tx_preset_index = OPA_INVALID_INDEX; |
| 939 | |
| 940 | /* the link defaults to enabled */ |
| 941 | ppd->link_enabled = 1; |
| 942 | /* the driver link ready state defaults to not ready */ |
| 943 | ppd->driver_link_ready = 0; |
| 944 | ppd->offline_disabled_reason = HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE); |
| 945 | |
Easwar Hariharan | 715c430 | 2016-02-03 14:32:14 -0800 | [diff] [blame] | 946 | /* Skip the tuning for testing (loopback != none) and simulations */ |
| 947 | if (loopback != LOOPBACK_NONE || |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 948 | ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR) { |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 949 | ppd->driver_link_ready = 1; |
Jan Sokolowski | ba81a42 | 2017-08-28 11:23:21 -0700 | [diff] [blame] | 950 | |
| 951 | if (qsfp_mod_present(ppd)) { |
| 952 | ret = acquire_chip_resource(ppd->dd, |
| 953 | qsfp_resource(ppd->dd), |
| 954 | QSFP_WAIT); |
| 955 | if (ret) { |
| 956 | dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n", |
| 957 | __func__, (int)ppd->dd->hfi1_id); |
| 958 | goto bail; |
| 959 | } |
| 960 | |
| 961 | refresh_qsfp_cache(ppd, &ppd->qsfp_info); |
| 962 | release_chip_resource(ppd->dd, qsfp_resource(ppd->dd)); |
| 963 | } |
| 964 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 965 | return; |
| 966 | } |
| 967 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 968 | switch (ppd->port_type) { |
| 969 | case PORT_TYPE_DISCONNECTED: |
| 970 | ppd->offline_disabled_reason = |
| 971 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_DISCONNECTED); |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 972 | dd_dev_warn(dd, "%s: Port disconnected, disabling port\n", |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 973 | __func__); |
| 974 | goto bail; |
| 975 | case PORT_TYPE_FIXED: |
| 976 | /* platform_atten, remote_atten pre-zeroed to catch error */ |
| 977 | get_platform_config_field( |
| 978 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 979 | PORT_TABLE_LOCAL_ATTEN_25G, &platform_atten, 4); |
| 980 | |
| 981 | get_platform_config_field( |
| 982 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 983 | PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4); |
| 984 | |
| 985 | total_atten = platform_atten + remote_atten; |
| 986 | |
| 987 | tuning_method = OPA_PASSIVE_TUNING; |
| 988 | break; |
| 989 | case PORT_TYPE_VARIABLE: |
| 990 | if (qsfp_mod_present(ppd)) { |
| 991 | /* |
| 992 | * platform_atten, remote_atten pre-zeroed to |
| 993 | * catch error |
| 994 | */ |
| 995 | get_platform_config_field( |
| 996 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 997 | PORT_TABLE_LOCAL_ATTEN_25G, |
| 998 | &platform_atten, 4); |
| 999 | |
| 1000 | get_platform_config_field( |
| 1001 | ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0, |
| 1002 | PORT_TABLE_REMOTE_ATTEN_25G, |
| 1003 | &remote_atten, 4); |
| 1004 | |
| 1005 | total_atten = platform_atten + remote_atten; |
| 1006 | |
| 1007 | tuning_method = OPA_PASSIVE_TUNING; |
Easwar Hariharan | 623bba2 | 2016-04-12 11:25:57 -0700 | [diff] [blame] | 1008 | } else { |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1009 | ppd->offline_disabled_reason = |
| 1010 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_CHASSIS_CONFIG); |
Easwar Hariharan | 623bba2 | 2016-04-12 11:25:57 -0700 | [diff] [blame] | 1011 | goto bail; |
| 1012 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1013 | break; |
| 1014 | case PORT_TYPE_QSFP: |
| 1015 | if (qsfp_mod_present(ppd)) { |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 1016 | ret = acquire_chip_resource(ppd->dd, |
| 1017 | qsfp_resource(ppd->dd), |
| 1018 | QSFP_WAIT); |
| 1019 | if (ret) { |
| 1020 | dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n", |
| 1021 | __func__, (int)ppd->dd->hfi1_id); |
| 1022 | goto bail; |
| 1023 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1024 | refresh_qsfp_cache(ppd, &ppd->qsfp_info); |
| 1025 | |
| 1026 | if (ppd->qsfp_info.cache_valid) { |
| 1027 | ret = tune_qsfp(ppd, |
| 1028 | &tx_preset_index, |
| 1029 | &rx_preset_index, |
| 1030 | &tuning_method, |
| 1031 | &total_atten); |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 1032 | |
| 1033 | /* |
| 1034 | * We may have modified the QSFP memory, so |
| 1035 | * update the cache to reflect the changes |
| 1036 | */ |
| 1037 | refresh_qsfp_cache(ppd, &ppd->qsfp_info); |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 1038 | limiting_active = |
| 1039 | ppd->qsfp_info.limiting_active; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1040 | } else { |
| 1041 | dd_dev_err(dd, |
| 1042 | "%s: Reading QSFP memory failed\n", |
| 1043 | __func__); |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 1044 | ret = -EINVAL; /* a fail indication */ |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1045 | } |
Dean Luick | e4e0e39 | 2016-04-12 11:28:36 -0700 | [diff] [blame] | 1046 | release_chip_resource(ppd->dd, qsfp_resource(ppd->dd)); |
| 1047 | if (ret) |
| 1048 | goto bail; |
Easwar Hariharan | 623bba2 | 2016-04-12 11:25:57 -0700 | [diff] [blame] | 1049 | } else { |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1050 | ppd->offline_disabled_reason = |
| 1051 | HFI1_ODR_MASK( |
Easwar Hariharan | e1bf0d5 | 2016-02-03 14:36:58 -0800 | [diff] [blame] | 1052 | OPA_LINKDOWN_REASON_LOCAL_MEDIA_NOT_INSTALLED); |
Easwar Hariharan | 623bba2 | 2016-04-12 11:25:57 -0700 | [diff] [blame] | 1053 | goto bail; |
| 1054 | } |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1055 | break; |
| 1056 | default: |
Sebastian Sanchez | b4e9e2f | 2017-05-26 05:35:57 -0700 | [diff] [blame] | 1057 | dd_dev_warn(ppd->dd, "%s: Unknown port type\n", __func__); |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 1058 | ppd->port_type = PORT_TYPE_UNKNOWN; |
| 1059 | tuning_method = OPA_UNKNOWN_TUNING; |
| 1060 | total_atten = 0; |
| 1061 | limiting_active = 0; |
| 1062 | tx_preset_index = OPA_INVALID_INDEX; |
| 1063 | break; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1064 | } |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 1065 | |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1066 | if (ppd->offline_disabled_reason == |
| 1067 | HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE)) |
| 1068 | apply_tunings(ppd, tx_preset_index, tuning_method, |
Easwar Hariharan | 97167e8 | 2016-02-09 14:29:22 -0800 | [diff] [blame] | 1069 | total_atten, limiting_active); |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1070 | |
Easwar Hariharan | c3838b3 | 2016-02-09 14:29:13 -0800 | [diff] [blame] | 1071 | if (!ret) |
| 1072 | ppd->driver_link_ready = 1; |
Easwar Hariharan | 8ebd4cf | 2016-02-03 14:31:14 -0800 | [diff] [blame] | 1073 | |
| 1074 | return; |
| 1075 | bail: |
| 1076 | ppd->driver_link_ready = 0; |
| 1077 | } |