Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 1 | /* |
Komal Seelam | f860068 | 2016-02-02 18:17:13 +0530 | [diff] [blame] | 2 | * Copyright (c) 2015-2016 The Linux Foundation. All rights reserved. |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * DOC: hif_napi.c |
| 30 | * |
| 31 | * HIF NAPI interface implementation |
| 32 | */ |
| 33 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 34 | #include <string.h> /* memset */ |
| 35 | |
| 36 | /* Linux headers */ |
| 37 | #include <linux/cpumask.h> |
| 38 | #include <linux/cpufreq.h> |
| 39 | #include <linux/cpu.h> |
| 40 | #include <linux/topology.h> |
| 41 | #include <linux/interrupt.h> |
Manjunathappa Prakash | 21196d2 | 2016-09-12 13:39:41 -0700 | [diff] [blame] | 42 | #ifdef HELIUMPLUS |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 43 | #include <soc/qcom/irq-helper.h> |
Orhan K AKYILDIZ | 6d9b757 | 2016-09-25 21:31:50 -0700 | [diff] [blame] | 44 | #include <pld_snoc.h> |
Manjunathappa Prakash | 21196d2 | 2016-09-12 13:39:41 -0700 | [diff] [blame] | 45 | #endif |
| 46 | #include <linux/pm.h> |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 47 | |
| 48 | /* Driver headers */ |
| 49 | #include <cds_api.h> |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 50 | #include <hif_napi.h> |
| 51 | #include <hif_debug.h> |
| 52 | #include <hif_io32.h> |
| 53 | #include <ce_api.h> |
Dhanashri Atre | 8d97817 | 2015-10-30 15:12:03 -0700 | [diff] [blame] | 54 | #include <ce_internal.h> |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 55 | |
| 56 | enum napi_decision_vector { |
| 57 | HIF_NAPI_NOEVENT = 0, |
| 58 | HIF_NAPI_INITED = 1, |
| 59 | HIF_NAPI_CONF_UP = 2 |
| 60 | }; |
| 61 | #define ENABLE_NAPI_MASK (HIF_NAPI_INITED | HIF_NAPI_CONF_UP) |
| 62 | |
Manjunathappa Prakash | 21196d2 | 2016-09-12 13:39:41 -0700 | [diff] [blame] | 63 | #ifdef HELIUMPLUS |
| 64 | static inline int hif_get_irq_for_ce(int ce_id) |
| 65 | { |
Orhan K AKYILDIZ | 6d9b757 | 2016-09-25 21:31:50 -0700 | [diff] [blame] | 66 | return pld_snoc_get_irq(ce_id); |
Manjunathappa Prakash | 21196d2 | 2016-09-12 13:39:41 -0700 | [diff] [blame] | 67 | } |
| 68 | #else /* HELIUMPLUS */ |
| 69 | static inline int hif_get_irq_for_ce(int ce_id) |
| 70 | { |
| 71 | return -EINVAL; |
| 72 | } |
| 73 | static int hif_napi_cpu_migrate(struct qca_napi_data *napid, int cpu, |
| 74 | int action) |
| 75 | { |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | int hif_napi_cpu_blacklist(bool is_on) { return 0; } |
| 80 | #endif /* HELIUMPLUS */ |
| 81 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 82 | /** |
| 83 | * hif_napi_create() - creates the NAPI structures for a given CE |
| 84 | * @hif : pointer to hif context |
| 85 | * @pipe_id: the CE id on which the instance will be created |
| 86 | * @poll : poll function to be used for this NAPI instance |
| 87 | * @budget : budget to be registered with the NAPI instance |
| 88 | * @scale : scale factor on the weight (to scaler budget to 1000) |
| 89 | * |
| 90 | * Description: |
| 91 | * Creates NAPI instances. This function is called |
| 92 | * unconditionally during initialization. It creates |
| 93 | * napi structures through the proper HTC/HIF calls. |
| 94 | * The structures are disabled on creation. |
| 95 | * Note that for each NAPI instance a separate dummy netdev is used |
| 96 | * |
| 97 | * Return: |
| 98 | * < 0: error |
| 99 | * = 0: <should never happen> |
| 100 | * > 0: id of the created object (for multi-NAPI, number of objects created) |
| 101 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 102 | int hif_napi_create(struct hif_opaque_softc *hif_ctx, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 103 | int (*poll)(struct napi_struct *, int), |
| 104 | int budget, |
| 105 | int scale) |
| 106 | { |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 107 | int i; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 108 | struct qca_napi_data *napid; |
| 109 | struct qca_napi_info *napii; |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 110 | struct CE_state *ce_state; |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 111 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 112 | int rc = 0; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 113 | |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 114 | NAPI_DEBUG("-->(budget=%d, scale=%d)", |
| 115 | budget, scale); |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 116 | NAPI_DEBUG("hif->napi_data.state = 0x%08x", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 117 | hif->napi_data.state); |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 118 | NAPI_DEBUG("hif->napi_data.ce_map = 0x%08x", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 119 | hif->napi_data.ce_map); |
| 120 | |
| 121 | napid = &(hif->napi_data); |
| 122 | if (0 == (napid->state & HIF_NAPI_INITED)) { |
| 123 | memset(napid, 0, sizeof(struct qca_napi_data)); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 124 | spin_lock_init(&(napid->lock)); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 125 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 126 | napid->state |= HIF_NAPI_INITED; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 127 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 128 | rc = hif_napi_cpu_init(napid); |
| 129 | if (rc != 0) { |
| 130 | HIF_ERROR("NAPI_initialization failed,. %d", rc); |
| 131 | goto hnc_err; |
| 132 | } |
| 133 | |
| 134 | HIF_INFO("%s: NAPI structures initialized, rc=%d", |
| 135 | __func__, rc); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 136 | } |
Houston Hoffman | d6f946c | 2016-04-06 15:16:00 -0700 | [diff] [blame] | 137 | for (i = 0; i < hif->ce_count; i++) { |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 138 | ce_state = hif->ce_id_to_state[i]; |
Venkateswara Swamy Bandaru | 1633436 | 2016-08-23 15:38:10 +0530 | [diff] [blame] | 139 | NAPI_DEBUG("ce %d: htt_rx=%d htt_tx=%d", |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 140 | i, ce_state->htt_rx_data, |
| 141 | ce_state->htt_tx_data); |
| 142 | if (!ce_state->htt_rx_data) |
| 143 | continue; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 144 | |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 145 | /* Now this is a CE where we need NAPI on */ |
| 146 | NAPI_DEBUG("Creating NAPI on pipe %d", i); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 147 | |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 148 | napii = &(napid->napis[i]); |
| 149 | memset(napii, 0, sizeof(struct qca_napi_info)); |
| 150 | napii->scale = scale; |
| 151 | napii->id = NAPI_PIPE2ID(i); |
Venkateswara Swamy Bandaru | 1633436 | 2016-08-23 15:38:10 +0530 | [diff] [blame] | 152 | napii->hif_ctx = hif_ctx; |
Manjunathappa Prakash | 21196d2 | 2016-09-12 13:39:41 -0700 | [diff] [blame] | 153 | napii->irq = hif_get_irq_for_ce(i); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 154 | if (napii->irq < 0) |
| 155 | HIF_WARN("%s: bad IRQ value for CE %d: %d", |
| 156 | __func__, i, napii->irq); |
| 157 | |
Manjunathappa Prakash | 2146da3 | 2016-10-13 14:47:47 -0700 | [diff] [blame] | 158 | qdf_spinlock_create(&napii->lro_unloading_lock); |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 159 | init_dummy_netdev(&(napii->netdev)); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 160 | |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 161 | NAPI_DEBUG("adding napi=%p to netdev=%p (poll=%p, bdgt=%d)", |
| 162 | &(napii->napi), &(napii->netdev), poll, budget); |
| 163 | netif_napi_add(&(napii->netdev), &(napii->napi), poll, budget); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 164 | |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 165 | NAPI_DEBUG("after napi_add"); |
| 166 | NAPI_DEBUG("napi=0x%p, netdev=0x%p", |
| 167 | &(napii->napi), &(napii->netdev)); |
| 168 | NAPI_DEBUG("napi.dev_list.prev=0x%p, next=0x%p", |
| 169 | napii->napi.dev_list.prev, |
| 170 | napii->napi.dev_list.next); |
| 171 | NAPI_DEBUG("dev.napi_list.prev=0x%p, next=0x%p", |
| 172 | napii->netdev.napi_list.prev, |
| 173 | napii->netdev.napi_list.next); |
| 174 | |
| 175 | /* It is OK to change the state variable below without |
| 176 | * protection as there should be no-one around yet |
| 177 | */ |
| 178 | napid->ce_map |= (0x01 << i); |
| 179 | HIF_INFO("%s: NAPI id %d created for pipe %d", __func__, |
| 180 | napii->id, i); |
| 181 | } |
| 182 | NAPI_DEBUG("NAPI idscreated for pipe all applicable pipes"); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 183 | hnc_err: |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 184 | NAPI_DEBUG("<--napi_instances_map=%x]", napid->ce_map); |
| 185 | return napid->ce_map; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /** |
| 189 | * |
| 190 | * hif_napi_destroy() - destroys the NAPI structures for a given instance |
| 191 | * @hif : pointer to hif context |
| 192 | * @ce_id : the CE id whose napi instance will be destroyed |
| 193 | * @force : if set, will destroy even if entry is active (de-activates) |
| 194 | * |
| 195 | * Description: |
| 196 | * Destroy a given NAPI instance. This function is called |
| 197 | * unconditionally during cleanup. |
| 198 | * Refuses to destroy an entry of it is still enabled (unless force=1) |
| 199 | * Marks the whole napi_data invalid if all instances are destroyed. |
| 200 | * |
| 201 | * Return: |
| 202 | * -EINVAL: specific entry has not been created |
| 203 | * -EPERM : specific entry is still active |
| 204 | * 0 < : error |
| 205 | * 0 = : success |
| 206 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 207 | int hif_napi_destroy(struct hif_opaque_softc *hif_ctx, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 208 | uint8_t id, |
| 209 | int force) |
| 210 | { |
| 211 | uint8_t ce = NAPI_ID2PIPE(id); |
| 212 | int rc = 0; |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 213 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 214 | |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 215 | NAPI_DEBUG("-->(id=%d, force=%d)", id, force); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 216 | |
| 217 | if (0 == (hif->napi_data.state & HIF_NAPI_INITED)) { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 218 | HIF_ERROR("%s: NAPI not initialized or entry %d not created", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 219 | __func__, id); |
| 220 | rc = -EINVAL; |
| 221 | } else if (0 == (hif->napi_data.ce_map & (0x01 << ce))) { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 222 | HIF_ERROR("%s: NAPI instance %d (pipe %d) not created", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 223 | __func__, id, ce); |
| 224 | rc = -EINVAL; |
| 225 | } else { |
| 226 | struct qca_napi_data *napid; |
| 227 | struct qca_napi_info *napii; |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 228 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 229 | napid = &(hif->napi_data); |
| 230 | napii = &(napid->napis[ce]); |
| 231 | |
| 232 | if (hif->napi_data.state == HIF_NAPI_CONF_UP) { |
| 233 | if (force) { |
| 234 | napi_disable(&(napii->napi)); |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 235 | HIF_INFO("%s: NAPI entry %d force disabled", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 236 | __func__, id); |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 237 | NAPI_DEBUG("NAPI %d force disabled", id); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 238 | } else { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 239 | HIF_ERROR("%s: Cannot destroy active NAPI %d", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 240 | __func__, id); |
| 241 | rc = -EPERM; |
| 242 | } |
| 243 | } |
| 244 | if (0 == rc) { |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 245 | NAPI_DEBUG("before napi_del"); |
| 246 | NAPI_DEBUG("napi.dlist.prv=0x%p, next=0x%p", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 247 | napii->napi.dev_list.prev, |
| 248 | napii->napi.dev_list.next); |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 249 | NAPI_DEBUG("dev.napi_l.prv=0x%p, next=0x%p", |
Houston Hoffman | c7d5429 | 2016-04-13 18:55:37 -0700 | [diff] [blame] | 250 | napii->netdev.napi_list.prev, |
| 251 | napii->netdev.napi_list.next); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 252 | |
| 253 | netif_napi_del(&(napii->napi)); |
| 254 | |
| 255 | napid->ce_map &= ~(0x01 << ce); |
| 256 | napii->scale = 0; |
| 257 | HIF_INFO("%s: NAPI %d destroyed\n", __func__, id); |
| 258 | |
| 259 | /* if there are no active instances and |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 260 | * if they are all destroyed, |
| 261 | * set the whole structure to uninitialized state |
| 262 | */ |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 263 | if (napid->ce_map == 0) { |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 264 | rc = hif_napi_cpu_deinit(napid); |
| 265 | /* caller is tolerant to receiving !=0 rc */ |
| 266 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 267 | memset(napid, |
| 268 | 0, sizeof(struct qca_napi_data)); |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 269 | HIF_INFO("%s: no NAPI instances. Zapped.", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 270 | __func__); |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | return rc; |
| 276 | } |
| 277 | |
| 278 | /** |
Manjunathappa Prakash | 2146da3 | 2016-10-13 14:47:47 -0700 | [diff] [blame] | 279 | * hif_napi_lro_flush_cb_register() - init and register flush callback for LRO |
| 280 | * @hif_hdl: pointer to hif context |
| 281 | * @lro_flush_handler: register LRO flush callback |
| 282 | * @lro_init_handler: Callback for initializing LRO |
| 283 | * |
| 284 | * Return: positive value on success and 0 on failure |
| 285 | */ |
| 286 | int hif_napi_lro_flush_cb_register(struct hif_opaque_softc *hif_hdl, |
| 287 | void (lro_flush_handler)(void *), |
| 288 | void *(lro_init_handler)(void)) |
| 289 | { |
| 290 | int rc = 0; |
| 291 | int i; |
| 292 | struct CE_state *ce_state; |
| 293 | struct hif_softc *scn = HIF_GET_SOFTC(hif_hdl); |
| 294 | void *data = NULL; |
| 295 | struct qca_napi_data *napid; |
| 296 | struct qca_napi_info *napii; |
| 297 | |
| 298 | QDF_ASSERT(scn != NULL); |
| 299 | |
| 300 | napid = hif_napi_get_all(hif_hdl); |
| 301 | if (scn != NULL) { |
| 302 | for (i = 0; i < scn->ce_count; i++) { |
| 303 | ce_state = scn->ce_id_to_state[i]; |
| 304 | if ((ce_state != NULL) && (ce_state->htt_rx_data)) { |
| 305 | data = lro_init_handler(); |
| 306 | if (data == NULL) { |
| 307 | HIF_ERROR("%s: Failed to init LRO for CE %d", |
| 308 | __func__, i); |
| 309 | continue; |
| 310 | } |
| 311 | napii = &(napid->napis[i]); |
| 312 | napii->lro_flush_cb = lro_flush_handler; |
| 313 | napii->lro_ctx = data; |
| 314 | HIF_ERROR("Registering LRO for ce_id %d NAPI callback for %d flush_cb %p, lro_data %p\n", |
| 315 | i, napii->id, napii->lro_flush_cb, |
| 316 | napii->lro_ctx); |
| 317 | rc++; |
| 318 | } |
| 319 | } |
| 320 | } else { |
| 321 | HIF_ERROR("%s: hif_state NULL!", __func__); |
| 322 | } |
| 323 | return rc; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * hif_napi_lro_flush_cb_deregister() - Degregister and free LRO. |
| 328 | * @hif: pointer to hif context |
| 329 | * @lro_deinit_cb: LRO deinit callback |
| 330 | * |
| 331 | * Return: NONE |
| 332 | */ |
| 333 | void hif_napi_lro_flush_cb_deregister(struct hif_opaque_softc *hif_hdl, |
| 334 | void (lro_deinit_cb)(void *)) |
| 335 | { |
| 336 | int i; |
| 337 | struct CE_state *ce_state; |
| 338 | struct hif_softc *scn = HIF_GET_SOFTC(hif_hdl); |
| 339 | struct qca_napi_data *napid; |
| 340 | struct qca_napi_info *napii; |
| 341 | |
| 342 | QDF_ASSERT(scn != NULL); |
| 343 | |
| 344 | napid = hif_napi_get_all(hif_hdl); |
| 345 | if (scn != NULL) { |
| 346 | for (i = 0; i < scn->ce_count; i++) { |
| 347 | ce_state = scn->ce_id_to_state[i]; |
| 348 | if ((ce_state != NULL) && (ce_state->htt_rx_data)) { |
| 349 | napii = &(napid->napis[i]); |
| 350 | HIF_ERROR("deRegistering LRO for ce_id %d NAPI callback for %d flush_cb %p, lro_data %p\n", |
| 351 | i, napii->id, napii->lro_flush_cb, |
| 352 | napii->lro_ctx); |
| 353 | qdf_spin_lock_bh(&napii->lro_unloading_lock); |
| 354 | napii->lro_flush_cb = NULL; |
| 355 | lro_deinit_cb(napii->lro_ctx); |
| 356 | napii->lro_ctx = NULL; |
| 357 | qdf_spin_unlock_bh( |
| 358 | &napii->lro_unloading_lock); |
| 359 | qdf_spinlock_destroy( |
| 360 | &napii->lro_unloading_lock); |
| 361 | } |
| 362 | } |
| 363 | } else { |
| 364 | HIF_ERROR("%s: hif_state NULL!", __func__); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * hif_napi_get_lro_info() - returns the address LRO data for napi_id |
| 370 | * @hif: pointer to hif context |
| 371 | * @napi_id: napi instance |
| 372 | * |
| 373 | * Description: |
| 374 | * Returns the address of the LRO structure |
| 375 | * |
| 376 | * Return: |
| 377 | * <addr>: address of the LRO structure |
| 378 | */ |
| 379 | void *hif_napi_get_lro_info(struct hif_opaque_softc *hif_hdl, int napi_id) |
| 380 | { |
| 381 | struct hif_softc *scn = HIF_GET_SOFTC(hif_hdl); |
| 382 | struct qca_napi_data *napid; |
| 383 | struct qca_napi_info *napii; |
| 384 | |
| 385 | napid = &(scn->napi_data); |
| 386 | napii = &(napid->napis[NAPI_ID2PIPE(napi_id)]); |
| 387 | |
| 388 | return napii->lro_ctx; |
| 389 | } |
| 390 | |
| 391 | /** |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 392 | * |
| 393 | * hif_napi_get_all() - returns the address of the whole HIF NAPI structure |
| 394 | * @hif: pointer to hif context |
| 395 | * |
| 396 | * Description: |
| 397 | * Returns the address of the whole structure |
| 398 | * |
| 399 | * Return: |
| 400 | * <addr>: address of the whole HIF NAPI structure |
| 401 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 402 | inline struct qca_napi_data *hif_napi_get_all(struct hif_opaque_softc *hif_ctx) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 403 | { |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 404 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
| 405 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 406 | return &(hif->napi_data); |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 411 | * hif_napi_event() - reacts to events that impact NAPI |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 412 | * @hif : pointer to hif context |
| 413 | * @evnt: event that has been detected |
| 414 | * @data: more data regarding the event |
| 415 | * |
| 416 | * Description: |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 417 | * This function handles two types of events: |
| 418 | * 1- Events that change the state of NAPI (enabled/disabled): |
| 419 | * {NAPI_EVT_INI_FILE, NAPI_EVT_CMD_STATE} |
| 420 | * The state is retrievable by "hdd_napi_enabled(-1)" |
| 421 | * - NAPI will be on if either INI file is on and it has not been disabled |
| 422 | * by a subsequent vendor CMD, |
| 423 | * or it has been enabled by a vendor CMD. |
| 424 | * 2- Events that change the CPU affinity of a NAPI instance/IRQ: |
| 425 | * {NAPI_EVT_TPUT_STATE, NAPI_EVT_CPU_STATE} |
| 426 | * - NAPI will support a throughput mode (HI/LO), kept at napid->napi_mode |
| 427 | * - NAPI will switch throughput mode based on hdd_napi_throughput_policy() |
| 428 | * - In LO tput mode, NAPI will yield control if its interrupts to the system |
| 429 | * management functions. However in HI throughput mode, NAPI will actively |
| 430 | * manage its interrupts/instances (by trying to disperse them out to |
| 431 | * separate performance cores). |
| 432 | * - CPU eligibility is kept up-to-date by NAPI_EVT_CPU_STATE events. |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 433 | * |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 434 | * + In some cases (roaming peer management is the only case so far), a |
| 435 | * a client can trigger a "SERIALIZE" event. Basically, this means that the |
| 436 | * users is asking NAPI to go into a truly single execution context state. |
| 437 | * So, NAPI indicates to msm-irqbalancer that it wants to be blacklisted, |
| 438 | * (if called for the first time) and then moves all IRQs (for NAPI |
| 439 | * instances) to be collapsed to a single core. If called multiple times, |
| 440 | * it will just re-collapse the CPUs. This is because blacklist-on() API |
| 441 | * is reference-counted, and because the API has already been called. |
| 442 | * |
| 443 | * Such a user, should call "DESERIALIZE" (NORMAL) event, to set NAPI to go |
| 444 | * to its "normal" operation. Optionally, they can give a timeout value (in |
| 445 | * multiples of BusBandwidthCheckPeriod -- 100 msecs by default). In this |
| 446 | * case, NAPI will just set the current throughput state to uninitialized |
| 447 | * and set the delay period. Once policy handler is called, it would skip |
| 448 | * applying the policy delay period times, and otherwise apply the policy. |
| 449 | * |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 450 | * Return: |
| 451 | * < 0: some error |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 452 | * = 0: event handled successfully |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 453 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 454 | int hif_napi_event(struct hif_opaque_softc *hif_ctx, enum qca_napi_event event, |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 455 | void *data) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 456 | { |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 457 | int rc = 0; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 458 | uint32_t prev_state; |
| 459 | int i; |
| 460 | struct napi_struct *napi; |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 461 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 462 | struct qca_napi_data *napid = &(hif->napi_data); |
| 463 | enum qca_napi_tput_state tput_mode = QCA_NAPI_TPUT_UNINITIALIZED; |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 464 | enum { |
| 465 | BLACKLIST_NOT_PENDING, |
| 466 | BLACKLIST_ON_PENDING, |
| 467 | BLACKLIST_OFF_PENDING |
| 468 | } blacklist_pending = BLACKLIST_NOT_PENDING; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 469 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 470 | NAPI_DEBUG("%s: -->(event=%d, aux=%p)", __func__, event, data); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 471 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 472 | spin_lock_bh(&(napid->lock)); |
| 473 | prev_state = napid->state; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 474 | switch (event) { |
| 475 | case NAPI_EVT_INI_FILE: |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 476 | case NAPI_EVT_CMD_STATE: |
| 477 | case NAPI_EVT_INT_STATE: { |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 478 | int on = (data != ((void *)0)); |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 479 | |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 480 | HIF_INFO("%s: recved evnt: STATE_CMD %d; v = %d (state=0x%0x)", |
| 481 | __func__, event, |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 482 | on, prev_state); |
| 483 | if (on) |
| 484 | if (prev_state & HIF_NAPI_CONF_UP) { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 485 | HIF_INFO("%s: duplicate NAPI conf ON msg", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 486 | __func__); |
| 487 | } else { |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 488 | HIF_INFO("%s: setting state to ON", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 489 | __func__); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 490 | napid->state |= HIF_NAPI_CONF_UP; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 491 | } |
| 492 | else /* off request */ |
| 493 | if (prev_state & HIF_NAPI_CONF_UP) { |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 494 | HIF_INFO("%s: setting state to OFF", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 495 | __func__); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 496 | napid->state &= ~HIF_NAPI_CONF_UP; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 497 | } else { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 498 | HIF_INFO("%s: duplicate NAPI conf OFF msg", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 499 | __func__); |
| 500 | } |
| 501 | break; |
| 502 | } |
| 503 | /* case NAPI_INIT_FILE/CMD_STATE */ |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 504 | |
| 505 | case NAPI_EVT_CPU_STATE: { |
| 506 | int cpu = ((unsigned long int)data >> 16); |
| 507 | int val = ((unsigned long int)data & 0x0ff); |
| 508 | |
| 509 | NAPI_DEBUG("%s: evt=CPU_STATE on CPU %d value=%d", |
| 510 | __func__, cpu, val); |
| 511 | |
| 512 | /* state has already been set by hnc_cpu_notify_cb */ |
| 513 | if ((val == QCA_NAPI_CPU_DOWN) && |
| 514 | (napid->napi_mode == QCA_NAPI_TPUT_HI) && /* we manage */ |
| 515 | (napid->napi_cpu[cpu].napis != 0)) { |
| 516 | NAPI_DEBUG("%s: Migrating NAPIs out of cpu %d", |
| 517 | __func__, cpu); |
| 518 | rc = hif_napi_cpu_migrate(napid, |
| 519 | cpu, |
| 520 | HNC_ACT_RELOCATE); |
| 521 | napid->napi_cpu[cpu].napis = 0; |
| 522 | } |
| 523 | /* in QCA_NAPI_TPUT_LO case, napis MUST == 0 */ |
| 524 | break; |
| 525 | } |
| 526 | case NAPI_EVT_TPUT_STATE: { |
| 527 | |
| 528 | tput_mode = (enum qca_napi_tput_state)data; |
| 529 | if (tput_mode == QCA_NAPI_TPUT_LO) { |
| 530 | /* from TPUT_HI -> TPUT_LO */ |
| 531 | NAPI_DEBUG("%s: Moving to napi_tput_LO state", |
| 532 | __func__); |
| 533 | |
| 534 | rc = hif_napi_cpu_migrate(napid, |
| 535 | HNC_ANY_CPU, |
| 536 | HNC_ACT_COLLAPSE); |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 537 | blacklist_pending = BLACKLIST_OFF_PENDING; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 538 | } else { |
| 539 | /* from TPUT_LO -> TPUT->HI */ |
| 540 | NAPI_DEBUG("%s: Moving to napi_tput_HI state", |
| 541 | __func__); |
| 542 | |
| 543 | rc = hif_napi_cpu_migrate(napid, |
| 544 | HNC_ANY_CPU, |
| 545 | HNC_ACT_DISPERSE); |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 546 | blacklist_pending = BLACKLIST_ON_PENDING; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 547 | } |
| 548 | napid->napi_mode = tput_mode; |
| 549 | |
| 550 | break; |
| 551 | } |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 552 | case NAPI_EVT_USR_SERIAL: { |
| 553 | unsigned long users = (unsigned long)data; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 554 | |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 555 | NAPI_DEBUG("%s: User forced SERIALIZATION; users=%ld", |
| 556 | __func__, users); |
| 557 | |
| 558 | rc = hif_napi_cpu_migrate(napid, |
| 559 | HNC_ANY_CPU, |
| 560 | HNC_ACT_COLLAPSE); |
| 561 | if ((users == 0) && (rc == 0)) |
| 562 | blacklist_pending = BLACKLIST_ON_PENDING; |
| 563 | break; |
| 564 | } |
| 565 | case NAPI_EVT_USR_NORMAL: { |
| 566 | NAPI_DEBUG("%s: User forced DE-SERIALIZATION", __func__); |
| 567 | /* |
| 568 | * Deserialization timeout is handled at hdd layer; |
| 569 | * just mark current mode to uninitialized to ensure |
| 570 | * it will be set when the delay is over |
| 571 | */ |
| 572 | napid->napi_mode = QCA_NAPI_TPUT_UNINITIALIZED; |
| 573 | break; |
| 574 | } |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 575 | default: { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 576 | HIF_ERROR("%s: unknown event: %d (data=0x%0lx)", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 577 | __func__, event, (unsigned long) data); |
| 578 | break; |
| 579 | } /* default */ |
| 580 | }; /* switch */ |
| 581 | |
| 582 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 583 | spin_unlock_bh(&(napid->lock)); |
| 584 | |
| 585 | /* Call this API without spin_locks hif_napi_cpu_blacklist */ |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 586 | switch (blacklist_pending) { |
| 587 | case BLACKLIST_ON_PENDING: |
| 588 | /* assume the control of WLAN IRQs */ |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 589 | hif_napi_cpu_blacklist(true); |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 590 | break; |
| 591 | case BLACKLIST_OFF_PENDING: |
| 592 | /* yield the control of WLAN IRQs */ |
| 593 | hif_napi_cpu_blacklist(false); |
| 594 | break; |
| 595 | default: /* nothing to do */ |
| 596 | break; |
| 597 | } /* switch blacklist_pending */ |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 598 | |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 599 | if (prev_state != napid->state) { |
| 600 | if (napid->state == ENABLE_NAPI_MASK) { |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 601 | rc = 1; |
| 602 | for (i = 0; i < CE_COUNT_MAX; i++) |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 603 | if ((napid->ce_map & (0x01 << i))) { |
| 604 | napi = &(napid->napis[i].napi); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 605 | NAPI_DEBUG("%s: enabling NAPI %d", |
| 606 | __func__, i); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 607 | napi_enable(napi); |
| 608 | } |
| 609 | } else { |
| 610 | rc = 0; |
| 611 | for (i = 0; i < CE_COUNT_MAX; i++) |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 612 | if (napid->ce_map & (0x01 << i)) { |
| 613 | napi = &(napid->napis[i].napi); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 614 | NAPI_DEBUG("%s: disabling NAPI %d", |
| 615 | __func__, i); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 616 | napi_disable(napi); |
Orhan K AKYILDIZ | f006e93 | 2016-11-14 00:35:44 -0800 | [diff] [blame] | 617 | /* in case it is affined, remove it */ |
| 618 | irq_set_affinity_hint( |
| 619 | napid->napis[i].irq, |
| 620 | NULL); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 621 | } |
| 622 | } |
| 623 | } else { |
Houston Hoffman | c50572b | 2016-06-08 19:49:46 -0700 | [diff] [blame] | 624 | HIF_INFO("%s: no change in hif napi state (still %d)", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 625 | __func__, prev_state); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 626 | } |
| 627 | |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 628 | NAPI_DEBUG("<--[rc=%d]", rc); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 629 | return rc; |
| 630 | } |
| 631 | |
| 632 | /** |
| 633 | * hif_napi_enabled() - checks whether NAPI is enabled for given ce or not |
| 634 | * @hif: hif context |
| 635 | * @ce : CE instance (or -1, to check if any CEs are enabled) |
| 636 | * |
| 637 | * Return: bool |
| 638 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 639 | int hif_napi_enabled(struct hif_opaque_softc *hif_ctx, int ce) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 640 | { |
| 641 | int rc; |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 642 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 643 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 644 | if (-1 == ce) |
| 645 | rc = ((hif->napi_data.state == ENABLE_NAPI_MASK)); |
| 646 | else |
| 647 | rc = ((hif->napi_data.state == ENABLE_NAPI_MASK) && |
| 648 | (hif->napi_data.ce_map & (0x01 << ce))); |
| 649 | return rc; |
| 650 | }; |
| 651 | |
| 652 | /** |
| 653 | * hif_napi_enable_irq() - enables bus interrupts after napi_complete |
| 654 | * |
| 655 | * @hif: hif context |
| 656 | * @id : id of NAPI instance calling this (used to determine the CE) |
| 657 | * |
| 658 | * Return: void |
| 659 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 660 | inline void hif_napi_enable_irq(struct hif_opaque_softc *hif, int id) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 661 | { |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 662 | struct hif_softc *scn = HIF_GET_SOFTC(hif); |
| 663 | |
Houston Hoffman | 8f239f6 | 2016-03-14 21:12:05 -0700 | [diff] [blame] | 664 | hif_irq_enable(scn, NAPI_ID2PIPE(id)); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | |
| 668 | /** |
| 669 | * hif_napi_schedule() - schedules napi, updates stats |
| 670 | * @scn: hif context |
| 671 | * @ce_id: index of napi instance |
| 672 | * |
| 673 | * Return: void |
| 674 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 675 | int hif_napi_schedule(struct hif_opaque_softc *hif_ctx, int ce_id) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 676 | { |
| 677 | int cpu = smp_processor_id(); |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 678 | struct hif_softc *scn = HIF_GET_SOFTC(hif_ctx); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 679 | |
Houston Hoffman | fa260aa | 2016-04-26 16:14:13 -0700 | [diff] [blame] | 680 | hif_record_ce_desc_event(scn, ce_id, NAPI_SCHEDULE, |
| 681 | NULL, NULL, 0); |
| 682 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 683 | scn->napi_data.napis[ce_id].stats[cpu].napi_schedules++; |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 684 | NAPI_DEBUG("scheduling napi %d (ce:%d)", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 685 | scn->napi_data.napis[ce_id].id, ce_id); |
| 686 | napi_schedule(&(scn->napi_data.napis[ce_id].napi)); |
| 687 | |
| 688 | return true; |
| 689 | } |
| 690 | |
| 691 | /** |
| 692 | * hif_napi_poll() - NAPI poll routine |
| 693 | * @napi : pointer to NAPI struct as kernel holds it |
| 694 | * @budget: |
| 695 | * |
| 696 | * This is the body of the poll function. |
| 697 | * The poll function is called by kernel. So, there is a wrapper |
| 698 | * function in HDD, which in turn calls this function. |
| 699 | * Two main reasons why the whole thing is not implemented in HDD: |
| 700 | * a) references to things like ce_service that HDD is not aware of |
| 701 | * b) proximity to the implementation of ce_tasklet, which the body |
| 702 | * of this function should be very close to. |
| 703 | * |
| 704 | * NOTE TO THE MAINTAINER: |
| 705 | * Consider this function and ce_tasklet very tightly coupled pairs. |
| 706 | * Any changes to ce_tasklet or this function may likely need to be |
| 707 | * reflected in the counterpart. |
| 708 | * |
| 709 | * Returns: |
| 710 | * int: the amount of work done in this poll ( <= budget) |
| 711 | */ |
Komal Seelam | 5584a7c | 2016-02-24 19:22:48 +0530 | [diff] [blame] | 712 | int hif_napi_poll(struct hif_opaque_softc *hif_ctx, struct napi_struct *napi, |
| 713 | int budget) |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 714 | { |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 715 | int rc = 0; /* default: no work done, also takes care of error */ |
| 716 | int normalized, bucket; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 717 | int cpu = smp_processor_id(); |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 718 | struct hif_softc *hif = HIF_GET_SOFTC(hif_ctx); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 719 | struct qca_napi_info *napi_info; |
Houston Hoffman | eb2516c | 2016-04-01 12:53:50 -0700 | [diff] [blame] | 720 | struct CE_state *ce_state = NULL; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 721 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 722 | napi_info = (struct qca_napi_info *) |
| 723 | container_of(napi, struct qca_napi_info, napi); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 724 | |
| 725 | NAPI_DEBUG("%s -->(napi(%d, irq=%d), budget=%d)", |
| 726 | __func__, napi_info->id, napi_info->irq, budget); |
| 727 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 728 | napi_info->stats[cpu].napi_polls++; |
| 729 | |
Houston Hoffman | fa260aa | 2016-04-26 16:14:13 -0700 | [diff] [blame] | 730 | hif_record_ce_desc_event(hif, NAPI_ID2PIPE(napi_info->id), |
| 731 | NAPI_POLL_ENTER, NULL, NULL, cpu); |
| 732 | |
Manjunathappa Prakash | 2146da3 | 2016-10-13 14:47:47 -0700 | [diff] [blame] | 733 | qdf_spin_lock_bh(&napi_info->lro_unloading_lock); |
| 734 | if (unlikely(NULL == hif)) { |
| 735 | HIF_ERROR("%s: hif context is NULL", __func__); |
| 736 | QDF_ASSERT(0); /* emit a warning if hif NULL */ |
| 737 | goto out; |
| 738 | } else { |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 739 | rc = ce_per_engine_service(hif, NAPI_ID2PIPE(napi_info->id)); |
Rajeev Kumar | febbf6b | 2016-03-23 15:05:42 -0700 | [diff] [blame] | 740 | NAPI_DEBUG("%s: ce_per_engine_service processed %d msgs", |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 741 | __func__, rc); |
| 742 | } |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 743 | napi_info->stats[cpu].napi_workdone += rc; |
| 744 | normalized = (rc / napi_info->scale); |
Dhanashri Atre | 8d97817 | 2015-10-30 15:12:03 -0700 | [diff] [blame] | 745 | |
Manjunathappa Prakash | 2146da3 | 2016-10-13 14:47:47 -0700 | [diff] [blame] | 746 | ce_state = hif->ce_id_to_state[NAPI_ID2PIPE(napi_info->id)]; |
| 747 | |
| 748 | if (napi_info->lro_flush_cb) |
| 749 | napi_info->lro_flush_cb(napi_info->lro_ctx); |
| 750 | qdf_spin_unlock_bh(&napi_info->lro_unloading_lock); |
Dhanashri Atre | 8d97817 | 2015-10-30 15:12:03 -0700 | [diff] [blame] | 751 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 752 | /* do not return 0, if there was some work done, |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 753 | * even if it is below the scale |
| 754 | */ |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 755 | if (rc) |
| 756 | normalized++; |
| 757 | bucket = (normalized / QCA_NAPI_DEF_SCALE); |
| 758 | napi_info->stats[cpu].napi_budget_uses[bucket]++; |
| 759 | |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 760 | /* if ce_per engine reports 0, then poll should be terminated */ |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 761 | if (0 == rc) |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 762 | NAPI_DEBUG("%s:%d: nothing processed by CE. Completing NAPI", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 763 | __func__, __LINE__); |
| 764 | |
Himanshu Agarwal | 2a92459 | 2016-06-30 18:04:14 +0530 | [diff] [blame] | 765 | if (ce_state && (!ce_check_rx_pending(ce_state) || 0 == rc)) { |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 766 | napi_info->stats[cpu].napi_completes++; |
Houston Hoffman | fa260aa | 2016-04-26 16:14:13 -0700 | [diff] [blame] | 767 | |
| 768 | hif_record_ce_desc_event(hif, ce_state->id, NAPI_COMPLETE, |
| 769 | NULL, NULL, 0); |
Houston Hoffman | a757eda | 2016-05-12 21:19:50 -0700 | [diff] [blame] | 770 | if (normalized >= budget) |
| 771 | normalized = budget - 1; |
| 772 | |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 773 | /* enable interrupts */ |
| 774 | napi_complete(napi); |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 775 | if (NULL != hif) { |
Komal Seelam | 644263d | 2016-02-22 20:45:49 +0530 | [diff] [blame] | 776 | hif_napi_enable_irq(hif_ctx, napi_info->id); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 777 | |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 778 | /* support suspend/resume */ |
Chouhan, Anurag | fc06aa9 | 2016-03-03 19:05:05 +0530 | [diff] [blame] | 779 | qdf_atomic_dec(&(hif->active_tasklet_cnt)); |
Orhan K AKYILDIZ | c409461 | 2015-11-11 18:01:15 -0800 | [diff] [blame] | 780 | } |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 781 | |
Houston Hoffman | 5693683 | 2016-03-16 12:16:24 -0700 | [diff] [blame] | 782 | NAPI_DEBUG("%s:%d: napi_complete + enabling the interrupts", |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 783 | __func__, __LINE__); |
Houston Hoffman | a757eda | 2016-05-12 21:19:50 -0700 | [diff] [blame] | 784 | } else { |
| 785 | /* 4.4 kernel NAPI implementation requires drivers to |
| 786 | * return full work when they ask to be re-scheduled, |
| 787 | * or napi_complete and re-start with a fresh interrupt |
| 788 | */ |
| 789 | normalized = budget; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 790 | } |
| 791 | |
Houston Hoffman | fa260aa | 2016-04-26 16:14:13 -0700 | [diff] [blame] | 792 | hif_record_ce_desc_event(hif, NAPI_ID2PIPE(napi_info->id), |
| 793 | NAPI_POLL_EXIT, NULL, NULL, normalized); |
| 794 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 795 | NAPI_DEBUG("%s <--[normalized=%d]", __func__, normalized); |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 796 | return normalized; |
Manjunathappa Prakash | 2146da3 | 2016-10-13 14:47:47 -0700 | [diff] [blame] | 797 | out: |
| 798 | return rc; |
Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame] | 799 | } |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 800 | |
| 801 | #ifdef HELIUMPLUS |
| 802 | /* |
| 803 | * Local functions |
| 804 | * - no argument checks, all internal/trusted callers |
| 805 | */ |
| 806 | |
| 807 | #ifdef FEATURE_NAPI_DEBUG |
| 808 | static void hnc_dump_cpus(struct qca_napi_data *napid) |
| 809 | { |
| 810 | int i; |
| 811 | struct qca_napi_cpu *cpu = napid->napi_cpu; |
| 812 | |
| 813 | NAPI_DEBUG("%s: NAPI CPU TABLE", __func__); |
| 814 | NAPI_DEBUG("lilclhead=%d, bigclhead=%d", |
| 815 | napid->lilcl_head, napid->bigcl_head); |
| 816 | for (i = 0; i < NR_CPUS; i++) { |
| 817 | NAPI_DEBUG("CPU[%02d]: state:%d crid=%02d clid=%02d " |
Govind Singh | 861d5da | 2016-09-27 23:04:17 +0530 | [diff] [blame] | 818 | "crmk:0x%0lx thmk:0x%0lx frq:%d " |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 819 | "napi = 0x%08x lnk:%d", |
| 820 | i, |
| 821 | cpu[i].state, cpu[i].core_id, cpu[i].cluster_id, |
| 822 | cpu[i].core_mask.bits[0], |
| 823 | cpu[i].thread_mask.bits[0], |
Govind Singh | 861d5da | 2016-09-27 23:04:17 +0530 | [diff] [blame] | 824 | cpu[i].max_freq, cpu[i].napis, |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 825 | cpu[i].cluster_nxt); |
| 826 | } |
| 827 | /* return; -- Linus does not like it, I do. */ |
| 828 | } |
| 829 | #else |
| 830 | static void hnc_dump_cpus(struct qca_napi_data *napid) { /* no-op */ }; |
| 831 | #endif /* FEATURE_NAPI_DEBUG */ |
| 832 | /** |
| 833 | * hnc_link_clusters() - partitions to cpu table into clusters |
| 834 | * @napid: pointer to NAPI data |
| 835 | * |
| 836 | * Takes in a CPU topology table and builds two linked lists |
| 837 | * (big cluster cores, list-head at bigcl_head, and little cluster |
| 838 | * cores, list-head at lilcl_head) out of it. |
| 839 | * |
| 840 | * If there are more than two clusters: |
| 841 | * - bigcl_head and lilcl_head will be different, |
| 842 | * - the cluster with highest cpufreq will be considered the "big" cluster. |
| 843 | * If there are more than one with the highest frequency, the *last* of such |
| 844 | * clusters will be designated as the "big cluster" |
| 845 | * - the cluster with lowest cpufreq will be considered the "li'l" cluster. |
| 846 | * If there are more than one clusters with the lowest cpu freq, the *first* |
| 847 | * of such clusters will be designated as the "little cluster" |
| 848 | * - We only support up to 32 clusters |
| 849 | * Return: 0 : OK |
| 850 | * !0: error (at least one of lil/big clusters could not be found) |
| 851 | */ |
| 852 | #define HNC_MIN_CLUSTER 0 |
| 853 | #define HNC_MAX_CLUSTER 31 |
| 854 | static int hnc_link_clusters(struct qca_napi_data *napid) |
| 855 | { |
| 856 | int rc = 0; |
| 857 | |
| 858 | int i; |
| 859 | int it = 0; |
| 860 | uint32_t cl_done = 0x0; |
| 861 | int cl, curcl, curclhead; |
| 862 | int more; |
| 863 | unsigned int lilfrq = INT_MAX; |
| 864 | unsigned int bigfrq = 0; |
| 865 | unsigned int clfrq; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 866 | int prev; |
| 867 | struct qca_napi_cpu *cpus = napid->napi_cpu; |
| 868 | |
| 869 | napid->lilcl_head = napid->bigcl_head = -1; |
| 870 | |
| 871 | do { |
| 872 | more = 0; |
| 873 | it++; curcl = -1; |
| 874 | for (i = 0; i < NR_CPUS; i++) { |
| 875 | cl = cpus[i].cluster_id; |
| 876 | NAPI_DEBUG("Processing cpu[%d], cluster=%d\n", |
| 877 | i, cl); |
| 878 | if ((cl < HNC_MIN_CLUSTER) || (cl > HNC_MAX_CLUSTER)) { |
| 879 | NAPI_DEBUG("Bad cluster (%d). SKIPPED\n", cl); |
| 880 | QDF_ASSERT(0); |
| 881 | /* continue if ASSERTs are disabled */ |
| 882 | continue; |
| 883 | }; |
| 884 | if (cpumask_weight(&(cpus[i].core_mask)) == 0) { |
| 885 | NAPI_DEBUG("Core mask 0. SKIPPED\n"); |
| 886 | continue; |
| 887 | } |
| 888 | if (cl_done & (0x01 << cl)) { |
| 889 | NAPI_DEBUG("Cluster already processed. " |
| 890 | "SKIPPED\n"); |
| 891 | continue; |
| 892 | } else { |
| 893 | if (more == 0) { |
| 894 | more = 1; |
| 895 | curcl = cl; |
| 896 | curclhead = i; /* row */ |
| 897 | clfrq = cpus[i].max_freq; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 898 | prev = -1; |
| 899 | }; |
| 900 | if ((curcl >= 0) && (curcl != cl)) { |
| 901 | NAPI_DEBUG("Entry cl(%d) != curcl(%d). " |
| 902 | "SKIPPED\n", |
| 903 | cl, curcl); |
| 904 | continue; |
| 905 | } |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 906 | if (cpus[i].max_freq != clfrq) |
| 907 | NAPI_DEBUG("WARN: frq(%d)!=clfrq(%d)\n", |
| 908 | cpus[i].max_freq, clfrq); |
| 909 | if (clfrq >= bigfrq) { |
| 910 | bigfrq = clfrq; |
| 911 | napid->bigcl_head = curclhead; |
| 912 | NAPI_DEBUG("bigcl=%d\n", curclhead); |
| 913 | } |
| 914 | if (clfrq < lilfrq) { |
| 915 | lilfrq = clfrq; |
| 916 | napid->lilcl_head = curclhead; |
| 917 | NAPI_DEBUG("lilcl=%d\n", curclhead); |
| 918 | } |
| 919 | if (prev != -1) |
| 920 | cpus[prev].cluster_nxt = i; |
| 921 | |
| 922 | prev = i; |
| 923 | } |
| 924 | } |
| 925 | if (curcl >= 0) |
| 926 | cl_done |= (0x01 << curcl); |
| 927 | |
| 928 | } while (more); |
| 929 | |
| 930 | if (qdf_unlikely((napid->lilcl_head < 0) && (napid->bigcl_head < 0))) |
| 931 | rc = -EFAULT; |
| 932 | |
| 933 | hnc_dump_cpus(napid); /* if NAPI_DEBUG */ |
| 934 | return rc; |
| 935 | } |
| 936 | #undef HNC_MIN_CLUSTER |
| 937 | #undef HNC_MAX_CLUSTER |
| 938 | |
| 939 | /* |
| 940 | * hotplug function group |
| 941 | */ |
| 942 | |
| 943 | /** |
| 944 | * hnc_cpu_notify_cb() - handles CPU hotplug events |
| 945 | * |
| 946 | * On transitions to online, we onlu handle the ONLINE event, |
| 947 | * and ignore the PREP events, because we dont want to act too |
| 948 | * early. |
| 949 | * On transtion to offline, we act on PREP events, because |
| 950 | * we may need to move the irqs/NAPIs to another CPU before |
| 951 | * it is actually off-lined. |
| 952 | * |
| 953 | * Return: NOTIFY_OK (dont block action) |
| 954 | */ |
| 955 | static int hnc_cpu_notify_cb(struct notifier_block *nb, |
| 956 | unsigned long action, |
| 957 | void *hcpu) |
| 958 | { |
| 959 | int rc = NOTIFY_OK; |
| 960 | unsigned long cpu = (unsigned long)hcpu; |
| 961 | struct hif_opaque_softc *hif; |
| 962 | struct qca_napi_data *napid = NULL; |
| 963 | |
| 964 | NAPI_DEBUG("-->%s(act=%ld, cpu=%ld)", __func__, action, cpu); |
| 965 | |
| 966 | hif = (struct hif_opaque_softc *)cds_get_context(QDF_MODULE_ID_HIF); |
| 967 | if (qdf_likely(hif != NULL)) |
| 968 | napid = hif_napi_get_all(hif); |
| 969 | if (qdf_unlikely(napid == NULL)) { |
| 970 | NAPI_DEBUG("%s: hif/napid NULL (%p/%p)", |
| 971 | __func__, hif, napid); |
| 972 | goto lab_hnc_notify; |
| 973 | } |
| 974 | switch (action) { |
| 975 | case CPU_ONLINE: |
| 976 | napid->napi_cpu[cpu].state = QCA_NAPI_CPU_UP; |
| 977 | NAPI_DEBUG("%s: CPU %ld marked %d", |
| 978 | __func__, cpu, napid->napi_cpu[cpu].state); |
| 979 | break; |
| 980 | case CPU_DEAD: /* already dead; we have marked it before, but ... */ |
| 981 | case CPU_DEAD_FROZEN: |
| 982 | napid->napi_cpu[cpu].state = QCA_NAPI_CPU_DOWN; |
| 983 | NAPI_DEBUG("%s: CPU %ld marked %d", |
| 984 | __func__, cpu, napid->napi_cpu[cpu].state); |
| 985 | break; |
| 986 | case CPU_DOWN_PREPARE: |
| 987 | case CPU_DOWN_PREPARE_FROZEN: |
| 988 | napid->napi_cpu[cpu].state = QCA_NAPI_CPU_DOWN; |
| 989 | |
| 990 | NAPI_DEBUG("%s: CPU %ld marked %d; updating affinity", |
| 991 | __func__, cpu, napid->napi_cpu[cpu].state); |
| 992 | |
| 993 | /** |
| 994 | * we need to move any NAPIs on this CPU out. |
| 995 | * if we are in LO throughput mode, then this is valid |
| 996 | * if the CPU is the the low designated CPU. |
| 997 | */ |
| 998 | hif_napi_event(hif, |
| 999 | NAPI_EVT_CPU_STATE, |
| 1000 | (void *) |
| 1001 | ((cpu << 16) | napid->napi_cpu[cpu].state)); |
| 1002 | break; |
| 1003 | default: |
| 1004 | NAPI_DEBUG("%s: ignored. action: %ld", __func__, action); |
| 1005 | break; |
| 1006 | } /* switch */ |
| 1007 | lab_hnc_notify: |
| 1008 | NAPI_DEBUG("<--%s [%d]", __func__, rc); |
| 1009 | return rc; |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * hnc_hotplug_hook() - installs a hotplug notifier |
| 1014 | * @register: !0 => register , =0 => deregister |
| 1015 | * Note that this is different from the cpu notifier used by |
| 1016 | * rx_thread (cds_schedule.c). |
| 1017 | * We may consider combining these modifiers in the future. |
| 1018 | * |
| 1019 | * Return: 0: success |
| 1020 | * <0: error |
| 1021 | */ |
| 1022 | static struct notifier_block hnc_cpu_notifier = { |
| 1023 | .notifier_call = hnc_cpu_notify_cb, |
| 1024 | }; |
| 1025 | static int hnc_hotplug_hook(int install) |
| 1026 | { |
| 1027 | int rc = 0; |
| 1028 | |
| 1029 | NAPI_DEBUG("-->%s(%d)", __func__, install); |
| 1030 | |
| 1031 | if (install) |
| 1032 | rc = register_hotcpu_notifier(&hnc_cpu_notifier); |
| 1033 | else |
| 1034 | unregister_hotcpu_notifier(&hnc_cpu_notifier); |
| 1035 | |
| 1036 | NAPI_DEBUG("<--%s()[%d]", __func__, rc); |
| 1037 | return rc; |
| 1038 | } |
| 1039 | |
| 1040 | /** |
| 1041 | * hnc_install_tput() - installs a callback in the throughput detector |
| 1042 | * @register: !0 => register; =0: unregister |
| 1043 | * |
| 1044 | * installs a callback to be called when wifi driver throughput (tx+rx) |
| 1045 | * crosses a threshold. Currently, we are using the same criteria as |
| 1046 | * TCP ack suppression (500 packets/100ms by default). |
| 1047 | * |
| 1048 | * Return: 0 : success |
| 1049 | * <0: failure |
| 1050 | */ |
| 1051 | |
| 1052 | static int hnc_tput_hook(int install) |
| 1053 | { |
| 1054 | int rc = 0; |
| 1055 | |
| 1056 | /* |
| 1057 | * Nothing, until the bw_calculation accepts registration |
| 1058 | * it is now hardcoded in the wlan_hdd_main.c::hdd_bus_bw_compute_cbk |
| 1059 | * hdd_napi_throughput_policy(...) |
| 1060 | */ |
| 1061 | return rc; |
| 1062 | } |
| 1063 | |
| 1064 | /* |
| 1065 | * Implementation of hif_napi_cpu API |
| 1066 | */ |
| 1067 | |
| 1068 | /** |
| 1069 | * hif_napi_cpu_init() - initialization of irq affinity block |
| 1070 | * @ctx: pointer to qca_napi_data |
| 1071 | * |
| 1072 | * called by hif_napi_create, after the first instance is called |
| 1073 | * - builds napi_rss_cpus table from cpu topology |
| 1074 | * - links cores of the same clusters together |
| 1075 | * - installs hot-plug notifier |
| 1076 | * - installs throughput trigger notifier (when such mechanism exists) |
| 1077 | * |
| 1078 | * Return: 0: OK |
| 1079 | * <0: error code |
| 1080 | */ |
| 1081 | int hif_napi_cpu_init(void *ctx) |
| 1082 | { |
| 1083 | int rc = 0; |
| 1084 | int i; |
| 1085 | struct qca_napi_data *napid = (struct qca_napi_data *)ctx; |
| 1086 | struct qca_napi_cpu *cpus = napid->napi_cpu; |
| 1087 | |
| 1088 | NAPI_DEBUG("--> "); |
| 1089 | |
| 1090 | if (cpus[0].state != QCA_NAPI_CPU_UNINITIALIZED) { |
| 1091 | NAPI_DEBUG("NAPI RSS table already initialized.\n"); |
| 1092 | rc = -EALREADY; |
| 1093 | goto lab_rss_init; |
| 1094 | } |
| 1095 | |
| 1096 | /* build CPU topology table */ |
| 1097 | for_each_possible_cpu(i) { |
| 1098 | cpus[i].state = ((cpumask_test_cpu(i, cpu_online_mask) |
| 1099 | ? QCA_NAPI_CPU_UP |
| 1100 | : QCA_NAPI_CPU_DOWN)); |
| 1101 | cpus[i].core_id = topology_core_id(i); |
| 1102 | cpus[i].cluster_id = topology_physical_package_id(i); |
| 1103 | cpumask_copy(&(cpus[i].core_mask), |
| 1104 | topology_core_cpumask(i)); |
| 1105 | cpumask_copy(&(cpus[i].thread_mask), |
| 1106 | topology_sibling_cpumask(i)); |
| 1107 | cpus[i].max_freq = cpufreq_quick_get_max(i); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1108 | cpus[i].napis = 0x0; |
| 1109 | cpus[i].cluster_nxt = -1; /* invalid */ |
| 1110 | } |
| 1111 | |
| 1112 | /* link clusters together */ |
| 1113 | rc = hnc_link_clusters(napid); |
| 1114 | if (0 != rc) |
| 1115 | goto lab_err_topology; |
| 1116 | |
| 1117 | /* install hotplug notifier */ |
| 1118 | rc = hnc_hotplug_hook(1); |
| 1119 | if (0 != rc) |
| 1120 | goto lab_err_hotplug; |
| 1121 | |
| 1122 | /* install throughput notifier */ |
| 1123 | rc = hnc_tput_hook(1); |
| 1124 | if (0 == rc) |
| 1125 | goto lab_rss_init; |
| 1126 | |
| 1127 | lab_err_hotplug: |
| 1128 | hnc_tput_hook(0); |
| 1129 | hnc_hotplug_hook(0); |
| 1130 | lab_err_topology: |
Orhan K AKYILDIZ | 84deb97 | 2016-10-25 12:54:21 -0700 | [diff] [blame] | 1131 | memset(napid->napi_cpu, 0, sizeof(struct qca_napi_cpu) * NR_CPUS); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1132 | lab_rss_init: |
| 1133 | NAPI_DEBUG("<-- [rc=%d]", rc); |
| 1134 | return rc; |
| 1135 | } |
| 1136 | |
| 1137 | /** |
| 1138 | * hif_napi_cpu_deinit() - clean-up of irq affinity block |
| 1139 | * |
| 1140 | * called by hif_napi_destroy, when the last instance is removed |
| 1141 | * - uninstalls throughput and hotplug notifiers |
| 1142 | * - clears cpu topology table |
| 1143 | * Return: 0: OK |
| 1144 | */ |
| 1145 | int hif_napi_cpu_deinit(void *ctx) |
| 1146 | { |
| 1147 | int rc = 0; |
| 1148 | struct qca_napi_data *napid = (struct qca_napi_data *)ctx; |
| 1149 | |
| 1150 | NAPI_DEBUG("-->%s(...)", __func__); |
| 1151 | |
| 1152 | /* uninstall tput notifier */ |
| 1153 | rc = hnc_tput_hook(0); |
| 1154 | |
| 1155 | /* uninstall hotplug notifier */ |
| 1156 | rc = hnc_hotplug_hook(0); |
| 1157 | |
| 1158 | /* clear the topology table */ |
Orhan K AKYILDIZ | 84deb97 | 2016-10-25 12:54:21 -0700 | [diff] [blame] | 1159 | memset(napid->napi_cpu, 0, sizeof(struct qca_napi_cpu) * NR_CPUS); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1160 | |
| 1161 | NAPI_DEBUG("<--%s[rc=%d]", __func__, rc); |
| 1162 | |
| 1163 | return rc; |
| 1164 | } |
| 1165 | |
| 1166 | /** |
| 1167 | * hncm_migrate_to() - migrates a NAPI to a CPU |
| 1168 | * @napid: pointer to NAPI block |
| 1169 | * @ce_id: CE_id of the NAPI instance |
| 1170 | * @didx : index in the CPU topology table for the CPU to migrate to |
| 1171 | * |
| 1172 | * Migrates NAPI (identified by the CE_id) to the destination core |
| 1173 | * Updates the napi_map of the destination entry |
| 1174 | * |
| 1175 | * Return: |
| 1176 | * =0 : success |
| 1177 | * <0 : error |
| 1178 | */ |
| 1179 | int hncm_migrate_to(struct qca_napi_data *napid, |
| 1180 | int napi_ce, |
| 1181 | int didx) |
| 1182 | { |
| 1183 | int rc = 0; |
| 1184 | cpumask_t cpumask; |
| 1185 | |
| 1186 | NAPI_DEBUG("-->%s(napi_cd=%d, didx=%d)", __func__, napi_ce, didx); |
| 1187 | |
Mohit Khanna | 865d8ff | 2016-10-06 19:58:02 -0700 | [diff] [blame] | 1188 | cpumask.bits[0] = (1 << didx); |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1189 | rc = irq_set_affinity_hint(napid->napis[napi_ce].irq, &cpumask); |
| 1190 | napid->napi_cpu[didx].napis |= (1 << napi_ce); |
| 1191 | |
| 1192 | NAPI_DEBUG("<--%s[%d]", __func__, rc); |
| 1193 | return rc; |
| 1194 | } |
| 1195 | /** |
| 1196 | * hncm_dest_cpu() - finds a destination CPU for NAPI |
| 1197 | * @napid: pointer to NAPI block |
| 1198 | * @act : RELOCATE | COLLAPSE | DISPERSE |
| 1199 | * |
| 1200 | * Finds the designated destionation for the next IRQ. |
| 1201 | * RELOCATE: translated to either COLLAPSE or DISPERSE based |
| 1202 | * on napid->napi_mode (throughput state) |
| 1203 | * COLLAPSE: All have the same destination: the first online CPU in lilcl |
| 1204 | * DISPERSE: One of the CPU in bigcl, which has the smallest number of |
| 1205 | * NAPIs on it |
| 1206 | * |
| 1207 | * Return: >=0 : index in the cpu topology table |
| 1208 | * : < 0 : error |
| 1209 | */ |
| 1210 | int hncm_dest_cpu(struct qca_napi_data *napid, int act) |
| 1211 | { |
| 1212 | int destidx = -1; |
| 1213 | int head, i; |
| 1214 | |
| 1215 | NAPI_DEBUG("-->%s(act=%d)", __func__, act); |
| 1216 | if (act == HNC_ACT_RELOCATE) { |
| 1217 | if (napid->napi_mode == QCA_NAPI_TPUT_LO) |
| 1218 | act = HNC_ACT_COLLAPSE; |
| 1219 | else |
| 1220 | act = HNC_ACT_DISPERSE; |
| 1221 | NAPI_DEBUG("%s: act changed from HNC_ACT_RELOCATE to %d", |
| 1222 | __func__, act); |
| 1223 | } |
| 1224 | if (act == HNC_ACT_COLLAPSE) { |
| 1225 | head = i = napid->lilcl_head; |
| 1226 | retry_collapse: |
| 1227 | while (i >= 0) { |
| 1228 | if (napid->napi_cpu[i].state == QCA_NAPI_CPU_UP) { |
| 1229 | destidx = i; |
| 1230 | break; |
| 1231 | } else { |
| 1232 | i = napid->napi_cpu[i].cluster_nxt; |
| 1233 | } |
| 1234 | } |
| 1235 | if ((destidx < 0) && (head == napid->lilcl_head)) { |
| 1236 | NAPI_DEBUG("%s: COLLAPSE: no lilcl dest, try bigcl", |
| 1237 | __func__); |
| 1238 | head = i = napid->bigcl_head; |
| 1239 | goto retry_collapse; |
| 1240 | } |
| 1241 | } else { /* HNC_ACT_DISPERSE */ |
| 1242 | int smallest = 99; /* all 32 bits full */ |
| 1243 | int smallidx = -1; |
| 1244 | |
| 1245 | head = i = napid->bigcl_head; |
| 1246 | retry_disperse: |
| 1247 | while (i >= 0) { |
| 1248 | if ((napid->napi_cpu[i].state == QCA_NAPI_CPU_UP) && |
Orhan K AKYILDIZ | 6d9b757 | 2016-09-25 21:31:50 -0700 | [diff] [blame] | 1249 | (hweight32(napid->napi_cpu[i].napis) <= smallest)) { |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1250 | smallest = napid->napi_cpu[i].napis; |
| 1251 | smallidx = i; |
| 1252 | } |
| 1253 | i = napid->napi_cpu[i].cluster_nxt; |
| 1254 | } |
| 1255 | destidx = smallidx; |
| 1256 | if ((destidx < 0) && (head == napid->bigcl_head)) { |
| 1257 | NAPI_DEBUG("%s: DISPERSE: no bigcl dest, try lilcl", |
| 1258 | __func__); |
| 1259 | head = i = napid->lilcl_head; |
| 1260 | goto retry_disperse; |
| 1261 | } |
| 1262 | } |
| 1263 | NAPI_DEBUG("<--%s[dest=%d]", __func__, destidx); |
| 1264 | return destidx; |
| 1265 | } |
| 1266 | /** |
| 1267 | * hif_napi_cpu_migrate() - migrate IRQs away |
| 1268 | * @cpu: -1: all CPUs <n> specific CPU |
| 1269 | * @act: COLLAPSE | DISPERSE |
| 1270 | * |
| 1271 | * Moves IRQs/NAPIs from specific or all CPUs (specified by @cpu) to eligible |
| 1272 | * cores. Eligible cores are: |
| 1273 | * act=COLLAPSE -> the first online core of the little cluster |
| 1274 | * act=DISPERSE -> separate cores of the big cluster, so that each core will |
| 1275 | * host minimum number of NAPIs/IRQs (napid->cpus[cpu].napis) |
| 1276 | * |
| 1277 | * Note that this function is called with a spinlock acquired already. |
| 1278 | * |
| 1279 | * Return: =0: success |
| 1280 | * <0: error |
| 1281 | */ |
| 1282 | |
| 1283 | int hif_napi_cpu_migrate(struct qca_napi_data *napid, int cpu, int action) |
| 1284 | { |
| 1285 | int rc = 0; |
| 1286 | struct qca_napi_cpu *cpup; |
| 1287 | int i, dind; |
| 1288 | uint32_t napis; |
| 1289 | |
| 1290 | NAPI_DEBUG("-->%s(.., cpu=%d, act=%d)", |
| 1291 | __func__, cpu, action); |
| 1292 | /* the following is really: hif_napi_enabled() with less overhead */ |
| 1293 | if (napid->ce_map == 0) { |
| 1294 | NAPI_DEBUG("%s: NAPI disabled. Not migrating.", __func__); |
| 1295 | goto hncm_return; |
| 1296 | } |
| 1297 | |
| 1298 | cpup = napid->napi_cpu; |
| 1299 | |
| 1300 | switch (action) { |
| 1301 | case HNC_ACT_RELOCATE: |
| 1302 | case HNC_ACT_DISPERSE: |
| 1303 | case HNC_ACT_COLLAPSE: { |
| 1304 | /* first find the src napi set */ |
| 1305 | if (cpu == HNC_ANY_CPU) |
| 1306 | napis = napid->ce_map; |
| 1307 | else |
| 1308 | napis = cpup[cpu].napis; |
| 1309 | /* then clear the napi bitmap on each CPU */ |
| 1310 | for (i = 0; i < NR_CPUS; i++) |
| 1311 | cpup[i].napis = 0; |
| 1312 | /* then for each of the NAPIs to disperse: */ |
| 1313 | for (i = 0; i < CE_COUNT_MAX; i++) |
| 1314 | if (napis & (1 << i)) { |
| 1315 | /* find a destination CPU */ |
| 1316 | dind = hncm_dest_cpu(napid, action); |
| 1317 | if (dind >= 0) { |
| 1318 | NAPI_DEBUG("Migrating NAPI ce%d to %d", |
| 1319 | i, dind); |
| 1320 | rc = hncm_migrate_to(napid, i, dind); |
| 1321 | } else { |
| 1322 | NAPI_DEBUG("No dest for NAPI ce%d", i); |
| 1323 | hnc_dump_cpus(napid); |
| 1324 | rc = -1; |
| 1325 | } |
| 1326 | } |
| 1327 | break; |
| 1328 | } |
| 1329 | default: { |
| 1330 | NAPI_DEBUG("%s: bad action: %d\n", __func__, action); |
| 1331 | QDF_BUG(0); |
| 1332 | break; |
| 1333 | } |
| 1334 | } /* switch action */ |
| 1335 | |
| 1336 | hncm_return: |
| 1337 | hnc_dump_cpus(napid); |
| 1338 | return rc; |
| 1339 | } |
| 1340 | |
| 1341 | /** |
| 1342 | * hif_napi_cpu_blacklist() - calls kernel API to enable/disable blacklisting |
| 1343 | * |
| 1344 | * Return: from the API |
| 1345 | */ |
| 1346 | int hif_napi_cpu_blacklist(bool is_on) |
| 1347 | { |
| 1348 | int rc = 0; |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 1349 | static int ref_count; /* = 0 by the compiler */ |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1350 | |
| 1351 | NAPI_DEBUG("-->%s(%d)", __func__, is_on); |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 1352 | if (is_on) { |
| 1353 | ref_count++; |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1354 | rc = irq_blacklist_on(); |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 1355 | } else { |
| 1356 | do { |
| 1357 | rc = irq_blacklist_off(); |
| 1358 | ref_count--; |
| 1359 | } while (ref_count > 0); |
| 1360 | } |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1361 | |
| 1362 | NAPI_DEBUG("<--%s[%d]", __func__, rc); |
| 1363 | return rc; |
| 1364 | } |
| 1365 | |
Orhan K AKYILDIZ | 458fefc | 2016-09-16 00:43:38 -0700 | [diff] [blame] | 1366 | /** |
| 1367 | * hif_napi_serialize() - [de-]serialize NAPI operations |
| 1368 | * @hif: context |
| 1369 | * @is_on: 1: serialize, 0: deserialize |
| 1370 | * |
| 1371 | * hif_napi_serialize(hif, 1) can be called multiple times. It will perform the |
| 1372 | * following steps (see hif_napi_event for code): |
| 1373 | * - put irqs of all NAPI instances on the same CPU |
| 1374 | * - only for the first serialize call: blacklist |
| 1375 | * |
| 1376 | * hif_napi_serialize(hif, 0): |
| 1377 | * - start a timer (multiple of BusBandwidthTimer -- default: 100 msec) |
| 1378 | * - at the end of the timer, check the current throughput state and |
| 1379 | * implement it. |
| 1380 | */ |
| 1381 | static unsigned long napi_serialize_reqs; |
| 1382 | int hif_napi_serialize(struct hif_opaque_softc *hif, int is_on) |
| 1383 | { |
| 1384 | int rc = -EINVAL; |
| 1385 | |
| 1386 | if (hif != NULL) |
| 1387 | switch (is_on) { |
| 1388 | case 0: { /* de-serialize */ |
| 1389 | rc = hif_napi_event(hif, NAPI_EVT_USR_NORMAL, |
| 1390 | (void *) 0); |
| 1391 | napi_serialize_reqs = 0; |
| 1392 | break; |
| 1393 | } /* end de-serialize */ |
| 1394 | case 1: { /* serialize */ |
| 1395 | rc = hif_napi_event(hif, NAPI_EVT_USR_SERIAL, |
| 1396 | (void *)napi_serialize_reqs++); |
| 1397 | break; |
| 1398 | } /* end serialize */ |
| 1399 | default: |
| 1400 | break; /* no-op */ |
| 1401 | } /* switch */ |
| 1402 | return rc; |
| 1403 | } |
| 1404 | |
Orhan K AKYILDIZ | 7ce54e7 | 2016-05-16 12:36:32 -0700 | [diff] [blame] | 1405 | #endif /* ifdef HELIUMPLUS */ |