1e76ac2bfSKalle Valo /* 2e76ac2bfSKalle Valo * Copyright (c) 2007-2011 Atheros Communications Inc. 3e76ac2bfSKalle Valo * Copyright (c) 2011-2012 Qualcomm Atheros, Inc. 4e76ac2bfSKalle Valo * 5e76ac2bfSKalle Valo * Permission to use, copy, modify, and/or distribute this software for any 6e76ac2bfSKalle Valo * purpose with or without fee is hereby granted, provided that the above 7e76ac2bfSKalle Valo * copyright notice and this permission notice appear in all copies. 8e76ac2bfSKalle Valo * 9e76ac2bfSKalle Valo * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10e76ac2bfSKalle Valo * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11e76ac2bfSKalle Valo * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12e76ac2bfSKalle Valo * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13e76ac2bfSKalle Valo * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14e76ac2bfSKalle Valo * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15e76ac2bfSKalle Valo * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16e76ac2bfSKalle Valo */ 17e76ac2bfSKalle Valo 18e76ac2bfSKalle Valo #include "core.h" 19e76ac2bfSKalle Valo #include "hif.h" 20e76ac2bfSKalle Valo #include "debug.h" 21e76ac2bfSKalle Valo #include "hif-ops.h" 22e76ac2bfSKalle Valo #include <asm/unaligned.h> 23e76ac2bfSKalle Valo 24e76ac2bfSKalle Valo #define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask)) 25e76ac2bfSKalle Valo 26e76ac2bfSKalle Valo static void ath6kl_htc_mbox_cleanup(struct htc_target *target); 27e76ac2bfSKalle Valo static void ath6kl_htc_mbox_stop(struct htc_target *target); 28e76ac2bfSKalle Valo static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target, 29e76ac2bfSKalle Valo struct list_head *pkt_queue); 30e76ac2bfSKalle Valo static void ath6kl_htc_set_credit_dist(struct htc_target *target, 31e76ac2bfSKalle Valo struct ath6kl_htc_credit_info *cred_info, 32e76ac2bfSKalle Valo u16 svc_pri_order[], int len); 33e76ac2bfSKalle Valo 34e76ac2bfSKalle Valo /* threshold to re-enable Tx bundling for an AC*/ 35e76ac2bfSKalle Valo #define TX_RESUME_BUNDLE_THRESHOLD 1500 36e76ac2bfSKalle Valo 37e76ac2bfSKalle Valo /* Functions for Tx credit handling */ 38e76ac2bfSKalle Valo static void ath6kl_credit_deposit(struct ath6kl_htc_credit_info *cred_info, 39e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *ep_dist, 40e76ac2bfSKalle Valo int credits) 41e76ac2bfSKalle Valo { 42e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit deposit ep %d credits %d\n", 43e76ac2bfSKalle Valo ep_dist->endpoint, credits); 44e76ac2bfSKalle Valo 45e76ac2bfSKalle Valo ep_dist->credits += credits; 46e76ac2bfSKalle Valo ep_dist->cred_assngd += credits; 47e76ac2bfSKalle Valo cred_info->cur_free_credits -= credits; 48e76ac2bfSKalle Valo } 49e76ac2bfSKalle Valo 50e76ac2bfSKalle Valo static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, 51e76ac2bfSKalle Valo struct list_head *ep_list, 52e76ac2bfSKalle Valo int tot_credits) 53e76ac2bfSKalle Valo { 54e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *cur_ep_dist; 55e76ac2bfSKalle Valo int count; 56e76ac2bfSKalle Valo 57e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit init total %d\n", tot_credits); 58e76ac2bfSKalle Valo 59e76ac2bfSKalle Valo cred_info->cur_free_credits = tot_credits; 60e76ac2bfSKalle Valo cred_info->total_avail_credits = tot_credits; 61e76ac2bfSKalle Valo 62e76ac2bfSKalle Valo list_for_each_entry(cur_ep_dist, ep_list, list) { 63e76ac2bfSKalle Valo if (cur_ep_dist->endpoint == ENDPOINT_0) 64e76ac2bfSKalle Valo continue; 65e76ac2bfSKalle Valo 66e76ac2bfSKalle Valo cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; 67e76ac2bfSKalle Valo 68e76ac2bfSKalle Valo if (tot_credits > 4) { 69e76ac2bfSKalle Valo if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || 70e76ac2bfSKalle Valo (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { 71e76ac2bfSKalle Valo ath6kl_credit_deposit(cred_info, 72e76ac2bfSKalle Valo cur_ep_dist, 73e76ac2bfSKalle Valo cur_ep_dist->cred_min); 74e76ac2bfSKalle Valo cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 75e76ac2bfSKalle Valo } 76e76ac2bfSKalle Valo } 77e76ac2bfSKalle Valo 78e76ac2bfSKalle Valo if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { 79e76ac2bfSKalle Valo ath6kl_credit_deposit(cred_info, cur_ep_dist, 80e76ac2bfSKalle Valo cur_ep_dist->cred_min); 81e76ac2bfSKalle Valo /* 82e76ac2bfSKalle Valo * Control service is always marked active, it 83e76ac2bfSKalle Valo * never goes inactive EVER. 84e76ac2bfSKalle Valo */ 85e76ac2bfSKalle Valo cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 86f5f7ba25SKevin Fang } 87e76ac2bfSKalle Valo 88e76ac2bfSKalle Valo /* 89e76ac2bfSKalle Valo * Streams have to be created (explicit | implicit) for all 90e76ac2bfSKalle Valo * kinds of traffic. BE endpoints are also inactive in the 91e76ac2bfSKalle Valo * beginning. When BE traffic starts it creates implicit 92e76ac2bfSKalle Valo * streams that redistributes credits. 93e76ac2bfSKalle Valo * 94e76ac2bfSKalle Valo * Note: all other endpoints have minimums set but are 95e76ac2bfSKalle Valo * initially given NO credits. credits will be distributed 96e76ac2bfSKalle Valo * as traffic activity demands 97e76ac2bfSKalle Valo */ 98e76ac2bfSKalle Valo } 99e76ac2bfSKalle Valo 100f5f7ba25SKevin Fang /* 101f5f7ba25SKevin Fang * For ath6kl_credit_seek function, 102f5f7ba25SKevin Fang * it use list_for_each_entry_reverse to walk around the whole ep list. 103f5f7ba25SKevin Fang * Therefore assign this lowestpri_ep_dist after walk around the ep_list 104f5f7ba25SKevin Fang */ 105f5f7ba25SKevin Fang cred_info->lowestpri_ep_dist = cur_ep_dist->list; 106f5f7ba25SKevin Fang 107e76ac2bfSKalle Valo WARN_ON(cred_info->cur_free_credits <= 0); 108e76ac2bfSKalle Valo 109e76ac2bfSKalle Valo list_for_each_entry(cur_ep_dist, ep_list, list) { 110e76ac2bfSKalle Valo if (cur_ep_dist->endpoint == ENDPOINT_0) 111e76ac2bfSKalle Valo continue; 112e76ac2bfSKalle Valo 113e76ac2bfSKalle Valo if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) 114e76ac2bfSKalle Valo cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; 115e76ac2bfSKalle Valo else { 116e76ac2bfSKalle Valo /* 117e76ac2bfSKalle Valo * For the remaining data endpoints, we assume that 118e76ac2bfSKalle Valo * each cred_per_msg are the same. We use a simple 119e76ac2bfSKalle Valo * calculation here, we take the remaining credits 120e76ac2bfSKalle Valo * and determine how many max messages this can 121e76ac2bfSKalle Valo * cover and then set each endpoint's normal value 122e76ac2bfSKalle Valo * equal to 3/4 this amount. 123e76ac2bfSKalle Valo */ 124e76ac2bfSKalle Valo count = (cred_info->cur_free_credits / 125e76ac2bfSKalle Valo cur_ep_dist->cred_per_msg) 126e76ac2bfSKalle Valo * cur_ep_dist->cred_per_msg; 127e76ac2bfSKalle Valo count = (count * 3) >> 2; 128e76ac2bfSKalle Valo count = max(count, cur_ep_dist->cred_per_msg); 129e76ac2bfSKalle Valo cur_ep_dist->cred_norm = count; 130e76ac2bfSKalle Valo 131e76ac2bfSKalle Valo } 132e76ac2bfSKalle Valo 133e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, 134e76ac2bfSKalle Valo "credit ep %d svc_id %d credits %d per_msg %d norm %d min %d\n", 135e76ac2bfSKalle Valo cur_ep_dist->endpoint, 136e76ac2bfSKalle Valo cur_ep_dist->svc_id, 137e76ac2bfSKalle Valo cur_ep_dist->credits, 138e76ac2bfSKalle Valo cur_ep_dist->cred_per_msg, 139e76ac2bfSKalle Valo cur_ep_dist->cred_norm, 140e76ac2bfSKalle Valo cur_ep_dist->cred_min); 141e76ac2bfSKalle Valo } 142e76ac2bfSKalle Valo } 143e76ac2bfSKalle Valo 144e76ac2bfSKalle Valo /* initialize and setup credit distribution */ 145e76ac2bfSKalle Valo static int ath6kl_htc_mbox_credit_setup(struct htc_target *htc_target, 146e76ac2bfSKalle Valo struct ath6kl_htc_credit_info *cred_info) 147e76ac2bfSKalle Valo { 148e76ac2bfSKalle Valo u16 servicepriority[5]; 149e76ac2bfSKalle Valo 150e76ac2bfSKalle Valo memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info)); 151e76ac2bfSKalle Valo 152e76ac2bfSKalle Valo servicepriority[0] = WMI_CONTROL_SVC; /* highest */ 153e76ac2bfSKalle Valo servicepriority[1] = WMI_DATA_VO_SVC; 154e76ac2bfSKalle Valo servicepriority[2] = WMI_DATA_VI_SVC; 155e76ac2bfSKalle Valo servicepriority[3] = WMI_DATA_BE_SVC; 156e76ac2bfSKalle Valo servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ 157e76ac2bfSKalle Valo 158e76ac2bfSKalle Valo /* set priority list */ 159e76ac2bfSKalle Valo ath6kl_htc_set_credit_dist(htc_target, cred_info, servicepriority, 5); 160e76ac2bfSKalle Valo 161e76ac2bfSKalle Valo return 0; 162e76ac2bfSKalle Valo } 163e76ac2bfSKalle Valo 164e76ac2bfSKalle Valo /* reduce an ep's credits back to a set limit */ 165e76ac2bfSKalle Valo static void ath6kl_credit_reduce(struct ath6kl_htc_credit_info *cred_info, 166e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *ep_dist, 167e76ac2bfSKalle Valo int limit) 168e76ac2bfSKalle Valo { 169e76ac2bfSKalle Valo int credits; 170e76ac2bfSKalle Valo 171e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit reduce ep %d limit %d\n", 172e76ac2bfSKalle Valo ep_dist->endpoint, limit); 173e76ac2bfSKalle Valo 174e76ac2bfSKalle Valo ep_dist->cred_assngd = limit; 175e76ac2bfSKalle Valo 176e76ac2bfSKalle Valo if (ep_dist->credits <= limit) 177e76ac2bfSKalle Valo return; 178e76ac2bfSKalle Valo 179e76ac2bfSKalle Valo credits = ep_dist->credits - limit; 180e76ac2bfSKalle Valo ep_dist->credits -= credits; 181e76ac2bfSKalle Valo cred_info->cur_free_credits += credits; 182e76ac2bfSKalle Valo } 183e76ac2bfSKalle Valo 184e76ac2bfSKalle Valo static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info, 185e76ac2bfSKalle Valo struct list_head *epdist_list) 186e76ac2bfSKalle Valo { 187e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *cur_list; 188e76ac2bfSKalle Valo 189e76ac2bfSKalle Valo list_for_each_entry(cur_list, epdist_list, list) { 190e76ac2bfSKalle Valo if (cur_list->endpoint == ENDPOINT_0) 191e76ac2bfSKalle Valo continue; 192e76ac2bfSKalle Valo 193e76ac2bfSKalle Valo if (cur_list->cred_to_dist > 0) { 194e76ac2bfSKalle Valo cur_list->credits += cur_list->cred_to_dist; 195e76ac2bfSKalle Valo cur_list->cred_to_dist = 0; 196e76ac2bfSKalle Valo 197e76ac2bfSKalle Valo if (cur_list->credits > cur_list->cred_assngd) 198e76ac2bfSKalle Valo ath6kl_credit_reduce(cred_info, 199e76ac2bfSKalle Valo cur_list, 200e76ac2bfSKalle Valo cur_list->cred_assngd); 201e76ac2bfSKalle Valo 202e76ac2bfSKalle Valo if (cur_list->credits > cur_list->cred_norm) 203e76ac2bfSKalle Valo ath6kl_credit_reduce(cred_info, cur_list, 204e76ac2bfSKalle Valo cur_list->cred_norm); 205e76ac2bfSKalle Valo 206e76ac2bfSKalle Valo if (!(cur_list->dist_flags & HTC_EP_ACTIVE)) { 207e76ac2bfSKalle Valo if (cur_list->txq_depth == 0) 208e76ac2bfSKalle Valo ath6kl_credit_reduce(cred_info, 209e76ac2bfSKalle Valo cur_list, 0); 210e76ac2bfSKalle Valo } 211e76ac2bfSKalle Valo } 212e76ac2bfSKalle Valo } 213e76ac2bfSKalle Valo } 214e76ac2bfSKalle Valo 215e76ac2bfSKalle Valo /* 216e76ac2bfSKalle Valo * HTC has an endpoint that needs credits, ep_dist is the endpoint in 217e76ac2bfSKalle Valo * question. 218e76ac2bfSKalle Valo */ 219e76ac2bfSKalle Valo static void ath6kl_credit_seek(struct ath6kl_htc_credit_info *cred_info, 220e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *ep_dist) 221e76ac2bfSKalle Valo { 222e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *curdist_list; 223e76ac2bfSKalle Valo int credits = 0; 224e76ac2bfSKalle Valo int need; 225e76ac2bfSKalle Valo 226e76ac2bfSKalle Valo if (ep_dist->svc_id == WMI_CONTROL_SVC) 227e76ac2bfSKalle Valo goto out; 228e76ac2bfSKalle Valo 229e76ac2bfSKalle Valo if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || 230e76ac2bfSKalle Valo (ep_dist->svc_id == WMI_DATA_VO_SVC)) 231e76ac2bfSKalle Valo if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) 232e76ac2bfSKalle Valo goto out; 233e76ac2bfSKalle Valo 234e76ac2bfSKalle Valo /* 235e76ac2bfSKalle Valo * For all other services, we follow a simple algorithm of: 236e76ac2bfSKalle Valo * 237e76ac2bfSKalle Valo * 1. checking the free pool for credits 238e76ac2bfSKalle Valo * 2. checking lower priority endpoints for credits to take 239e76ac2bfSKalle Valo */ 240e76ac2bfSKalle Valo 241e76ac2bfSKalle Valo credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 242e76ac2bfSKalle Valo 243e76ac2bfSKalle Valo if (credits >= ep_dist->seek_cred) 244e76ac2bfSKalle Valo goto out; 245e76ac2bfSKalle Valo 246e76ac2bfSKalle Valo /* 247e76ac2bfSKalle Valo * We don't have enough in the free pool, try taking away from 248e76ac2bfSKalle Valo * lower priority services The rule for taking away credits: 249e76ac2bfSKalle Valo * 250e76ac2bfSKalle Valo * 1. Only take from lower priority endpoints 251e76ac2bfSKalle Valo * 2. Only take what is allocated above the minimum (never 252e76ac2bfSKalle Valo * starve an endpoint completely) 253e76ac2bfSKalle Valo * 3. Only take what you need. 254e76ac2bfSKalle Valo */ 255e76ac2bfSKalle Valo 256e76ac2bfSKalle Valo list_for_each_entry_reverse(curdist_list, 257e76ac2bfSKalle Valo &cred_info->lowestpri_ep_dist, 258e76ac2bfSKalle Valo list) { 259e76ac2bfSKalle Valo if (curdist_list == ep_dist) 260e76ac2bfSKalle Valo break; 261e76ac2bfSKalle Valo 262e76ac2bfSKalle Valo need = ep_dist->seek_cred - cred_info->cur_free_credits; 263e76ac2bfSKalle Valo 264e76ac2bfSKalle Valo if ((curdist_list->cred_assngd - need) >= 265e76ac2bfSKalle Valo curdist_list->cred_min) { 266e76ac2bfSKalle Valo /* 267e76ac2bfSKalle Valo * The current one has been allocated more than 268e76ac2bfSKalle Valo * it's minimum and it has enough credits assigned 269e76ac2bfSKalle Valo * above it's minimum to fulfill our need try to 270e76ac2bfSKalle Valo * take away just enough to fulfill our need. 271e76ac2bfSKalle Valo */ 272e76ac2bfSKalle Valo ath6kl_credit_reduce(cred_info, curdist_list, 273e76ac2bfSKalle Valo curdist_list->cred_assngd - need); 274e76ac2bfSKalle Valo 275e76ac2bfSKalle Valo if (cred_info->cur_free_credits >= 276e76ac2bfSKalle Valo ep_dist->seek_cred) 277e76ac2bfSKalle Valo break; 278e76ac2bfSKalle Valo } 279e76ac2bfSKalle Valo 280e76ac2bfSKalle Valo if (curdist_list->endpoint == ENDPOINT_0) 281e76ac2bfSKalle Valo break; 282e76ac2bfSKalle Valo } 283e76ac2bfSKalle Valo 284e76ac2bfSKalle Valo credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 285e76ac2bfSKalle Valo 286e76ac2bfSKalle Valo out: 287e76ac2bfSKalle Valo /* did we find some credits? */ 288e76ac2bfSKalle Valo if (credits) 289e76ac2bfSKalle Valo ath6kl_credit_deposit(cred_info, ep_dist, credits); 290e76ac2bfSKalle Valo 291e76ac2bfSKalle Valo ep_dist->seek_cred = 0; 292e76ac2bfSKalle Valo } 293e76ac2bfSKalle Valo 294e76ac2bfSKalle Valo /* redistribute credits based on activity change */ 295e76ac2bfSKalle Valo static void ath6kl_credit_redistribute(struct ath6kl_htc_credit_info *info, 296e76ac2bfSKalle Valo struct list_head *ep_dist_list) 297e76ac2bfSKalle Valo { 298e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *curdist_list; 299e76ac2bfSKalle Valo 300e76ac2bfSKalle Valo list_for_each_entry(curdist_list, ep_dist_list, list) { 301e76ac2bfSKalle Valo if (curdist_list->endpoint == ENDPOINT_0) 302e76ac2bfSKalle Valo continue; 303e76ac2bfSKalle Valo 304e76ac2bfSKalle Valo if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || 305e76ac2bfSKalle Valo (curdist_list->svc_id == WMI_DATA_BE_SVC)) 306e76ac2bfSKalle Valo curdist_list->dist_flags |= HTC_EP_ACTIVE; 307e76ac2bfSKalle Valo 308e76ac2bfSKalle Valo if ((curdist_list->svc_id != WMI_CONTROL_SVC) && 309e76ac2bfSKalle Valo !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { 310e76ac2bfSKalle Valo if (curdist_list->txq_depth == 0) 311e76ac2bfSKalle Valo ath6kl_credit_reduce(info, curdist_list, 0); 312e76ac2bfSKalle Valo else 313e76ac2bfSKalle Valo ath6kl_credit_reduce(info, 314e76ac2bfSKalle Valo curdist_list, 315e76ac2bfSKalle Valo curdist_list->cred_min); 316e76ac2bfSKalle Valo } 317e76ac2bfSKalle Valo } 318e76ac2bfSKalle Valo } 319e76ac2bfSKalle Valo 320e76ac2bfSKalle Valo /* 321e76ac2bfSKalle Valo * 322e76ac2bfSKalle Valo * This function is invoked whenever endpoints require credit 323e76ac2bfSKalle Valo * distributions. A lock is held while this function is invoked, this 324e76ac2bfSKalle Valo * function shall NOT block. The ep_dist_list is a list of distribution 325e76ac2bfSKalle Valo * structures in prioritized order as defined by the call to the 326e76ac2bfSKalle Valo * htc_set_credit_dist() api. 327e76ac2bfSKalle Valo */ 328e76ac2bfSKalle Valo static void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info, 329e76ac2bfSKalle Valo struct list_head *ep_dist_list, 330e76ac2bfSKalle Valo enum htc_credit_dist_reason reason) 331e76ac2bfSKalle Valo { 332e76ac2bfSKalle Valo switch (reason) { 333e76ac2bfSKalle Valo case HTC_CREDIT_DIST_SEND_COMPLETE: 334e76ac2bfSKalle Valo ath6kl_credit_update(cred_info, ep_dist_list); 335e76ac2bfSKalle Valo break; 336e76ac2bfSKalle Valo case HTC_CREDIT_DIST_ACTIVITY_CHANGE: 337e76ac2bfSKalle Valo ath6kl_credit_redistribute(cred_info, ep_dist_list); 338e76ac2bfSKalle Valo break; 339e76ac2bfSKalle Valo default: 340e76ac2bfSKalle Valo break; 341e76ac2bfSKalle Valo } 342e76ac2bfSKalle Valo 343e76ac2bfSKalle Valo WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); 344e76ac2bfSKalle Valo WARN_ON(cred_info->cur_free_credits < 0); 345e76ac2bfSKalle Valo } 346e76ac2bfSKalle Valo 347e76ac2bfSKalle Valo static void ath6kl_htc_tx_buf_align(u8 **buf, unsigned long len) 348e76ac2bfSKalle Valo { 349e76ac2bfSKalle Valo u8 *align_addr; 350e76ac2bfSKalle Valo 351e76ac2bfSKalle Valo if (!IS_ALIGNED((unsigned long) *buf, 4)) { 352e76ac2bfSKalle Valo align_addr = PTR_ALIGN(*buf - 4, 4); 353e76ac2bfSKalle Valo memmove(align_addr, *buf, len); 354e76ac2bfSKalle Valo *buf = align_addr; 355e76ac2bfSKalle Valo } 356e76ac2bfSKalle Valo } 357e76ac2bfSKalle Valo 358e76ac2bfSKalle Valo static void ath6kl_htc_tx_prep_pkt(struct htc_packet *packet, u8 flags, 359e76ac2bfSKalle Valo int ctrl0, int ctrl1) 360e76ac2bfSKalle Valo { 361e76ac2bfSKalle Valo struct htc_frame_hdr *hdr; 362e76ac2bfSKalle Valo 363e76ac2bfSKalle Valo packet->buf -= HTC_HDR_LENGTH; 364e76ac2bfSKalle Valo hdr = (struct htc_frame_hdr *)packet->buf; 365e76ac2bfSKalle Valo 366e76ac2bfSKalle Valo /* Endianess? */ 367e76ac2bfSKalle Valo put_unaligned((u16)packet->act_len, &hdr->payld_len); 368e76ac2bfSKalle Valo hdr->flags = flags; 369e76ac2bfSKalle Valo hdr->eid = packet->endpoint; 370e76ac2bfSKalle Valo hdr->ctrl[0] = ctrl0; 371e76ac2bfSKalle Valo hdr->ctrl[1] = ctrl1; 372e76ac2bfSKalle Valo } 373e76ac2bfSKalle Valo 374e76ac2bfSKalle Valo static void htc_reclaim_txctrl_buf(struct htc_target *target, 375e76ac2bfSKalle Valo struct htc_packet *pkt) 376e76ac2bfSKalle Valo { 377e76ac2bfSKalle Valo spin_lock_bh(&target->htc_lock); 378e76ac2bfSKalle Valo list_add_tail(&pkt->list, &target->free_ctrl_txbuf); 379e76ac2bfSKalle Valo spin_unlock_bh(&target->htc_lock); 380e76ac2bfSKalle Valo } 381e76ac2bfSKalle Valo 382e76ac2bfSKalle Valo static struct htc_packet *htc_get_control_buf(struct htc_target *target, 383e76ac2bfSKalle Valo bool tx) 384e76ac2bfSKalle Valo { 385e76ac2bfSKalle Valo struct htc_packet *packet = NULL; 386e76ac2bfSKalle Valo struct list_head *buf_list; 387e76ac2bfSKalle Valo 388e76ac2bfSKalle Valo buf_list = tx ? &target->free_ctrl_txbuf : &target->free_ctrl_rxbuf; 389e76ac2bfSKalle Valo 390e76ac2bfSKalle Valo spin_lock_bh(&target->htc_lock); 391e76ac2bfSKalle Valo 392e76ac2bfSKalle Valo if (list_empty(buf_list)) { 393e76ac2bfSKalle Valo spin_unlock_bh(&target->htc_lock); 394e76ac2bfSKalle Valo return NULL; 395e76ac2bfSKalle Valo } 396e76ac2bfSKalle Valo 397e76ac2bfSKalle Valo packet = list_first_entry(buf_list, struct htc_packet, list); 398e76ac2bfSKalle Valo list_del(&packet->list); 399e76ac2bfSKalle Valo spin_unlock_bh(&target->htc_lock); 400e76ac2bfSKalle Valo 401e76ac2bfSKalle Valo if (tx) 402e76ac2bfSKalle Valo packet->buf = packet->buf_start + HTC_HDR_LENGTH; 403e76ac2bfSKalle Valo 404e76ac2bfSKalle Valo return packet; 405e76ac2bfSKalle Valo } 406e76ac2bfSKalle Valo 407e76ac2bfSKalle Valo static void htc_tx_comp_update(struct htc_target *target, 408e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 409e76ac2bfSKalle Valo struct htc_packet *packet) 410e76ac2bfSKalle Valo { 411e76ac2bfSKalle Valo packet->completion = NULL; 412e76ac2bfSKalle Valo packet->buf += HTC_HDR_LENGTH; 413e76ac2bfSKalle Valo 414e76ac2bfSKalle Valo if (!packet->status) 415e76ac2bfSKalle Valo return; 416e76ac2bfSKalle Valo 417e76ac2bfSKalle Valo ath6kl_err("req failed (status:%d, ep:%d, len:%d creds:%d)\n", 418e76ac2bfSKalle Valo packet->status, packet->endpoint, packet->act_len, 419e76ac2bfSKalle Valo packet->info.tx.cred_used); 420e76ac2bfSKalle Valo 421e76ac2bfSKalle Valo /* on failure to submit, reclaim credits for this packet */ 422e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 423e76ac2bfSKalle Valo endpoint->cred_dist.cred_to_dist += 424e76ac2bfSKalle Valo packet->info.tx.cred_used; 425e76ac2bfSKalle Valo endpoint->cred_dist.txq_depth = get_queue_depth(&endpoint->txq); 426e76ac2bfSKalle Valo 427e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx ctxt 0x%p dist 0x%p\n", 428e76ac2bfSKalle Valo target->credit_info, &target->cred_dist_list); 429e76ac2bfSKalle Valo 430e76ac2bfSKalle Valo ath6kl_credit_distribute(target->credit_info, 431e76ac2bfSKalle Valo &target->cred_dist_list, 432e76ac2bfSKalle Valo HTC_CREDIT_DIST_SEND_COMPLETE); 433e76ac2bfSKalle Valo 434e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 435e76ac2bfSKalle Valo } 436e76ac2bfSKalle Valo 437e76ac2bfSKalle Valo static void htc_tx_complete(struct htc_endpoint *endpoint, 438e76ac2bfSKalle Valo struct list_head *txq) 439e76ac2bfSKalle Valo { 440e76ac2bfSKalle Valo if (list_empty(txq)) 441e76ac2bfSKalle Valo return; 442e76ac2bfSKalle Valo 443e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 444e76ac2bfSKalle Valo "htc tx complete ep %d pkts %d\n", 445e76ac2bfSKalle Valo endpoint->eid, get_queue_depth(txq)); 446e76ac2bfSKalle Valo 447e76ac2bfSKalle Valo ath6kl_tx_complete(endpoint->target, txq); 448e76ac2bfSKalle Valo } 449e76ac2bfSKalle Valo 450e76ac2bfSKalle Valo static void htc_tx_comp_handler(struct htc_target *target, 451e76ac2bfSKalle Valo struct htc_packet *packet) 452e76ac2bfSKalle Valo { 453e76ac2bfSKalle Valo struct htc_endpoint *endpoint = &target->endpoint[packet->endpoint]; 454e76ac2bfSKalle Valo struct list_head container; 455e76ac2bfSKalle Valo 456e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx complete seqno %d\n", 457e76ac2bfSKalle Valo packet->info.tx.seqno); 458e76ac2bfSKalle Valo 459e76ac2bfSKalle Valo htc_tx_comp_update(target, endpoint, packet); 460e76ac2bfSKalle Valo INIT_LIST_HEAD(&container); 461e76ac2bfSKalle Valo list_add_tail(&packet->list, &container); 462e76ac2bfSKalle Valo /* do completion */ 463e76ac2bfSKalle Valo htc_tx_complete(endpoint, &container); 464e76ac2bfSKalle Valo } 465e76ac2bfSKalle Valo 466e76ac2bfSKalle Valo static void htc_async_tx_scat_complete(struct htc_target *target, 467e76ac2bfSKalle Valo struct hif_scatter_req *scat_req) 468e76ac2bfSKalle Valo { 469e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 470e76ac2bfSKalle Valo struct htc_packet *packet; 471e76ac2bfSKalle Valo struct list_head tx_compq; 472e76ac2bfSKalle Valo int i; 473e76ac2bfSKalle Valo 474e76ac2bfSKalle Valo INIT_LIST_HEAD(&tx_compq); 475e76ac2bfSKalle Valo 476e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 477e76ac2bfSKalle Valo "htc tx scat complete len %d entries %d\n", 478e76ac2bfSKalle Valo scat_req->len, scat_req->scat_entries); 479e76ac2bfSKalle Valo 480e76ac2bfSKalle Valo if (scat_req->status) 481e76ac2bfSKalle Valo ath6kl_err("send scatter req failed: %d\n", scat_req->status); 482e76ac2bfSKalle Valo 483e76ac2bfSKalle Valo packet = scat_req->scat_list[0].packet; 484e76ac2bfSKalle Valo endpoint = &target->endpoint[packet->endpoint]; 485e76ac2bfSKalle Valo 486e76ac2bfSKalle Valo /* walk through the scatter list and process */ 487e76ac2bfSKalle Valo for (i = 0; i < scat_req->scat_entries; i++) { 488e76ac2bfSKalle Valo packet = scat_req->scat_list[i].packet; 489e76ac2bfSKalle Valo if (!packet) { 490e76ac2bfSKalle Valo WARN_ON(1); 491e76ac2bfSKalle Valo return; 492e76ac2bfSKalle Valo } 493e76ac2bfSKalle Valo 494e76ac2bfSKalle Valo packet->status = scat_req->status; 495e76ac2bfSKalle Valo htc_tx_comp_update(target, endpoint, packet); 496e76ac2bfSKalle Valo list_add_tail(&packet->list, &tx_compq); 497e76ac2bfSKalle Valo } 498e76ac2bfSKalle Valo 499e76ac2bfSKalle Valo /* free scatter request */ 500e76ac2bfSKalle Valo hif_scatter_req_add(target->dev->ar, scat_req); 501e76ac2bfSKalle Valo 502e76ac2bfSKalle Valo /* complete all packets */ 503e76ac2bfSKalle Valo htc_tx_complete(endpoint, &tx_compq); 504e76ac2bfSKalle Valo } 505e76ac2bfSKalle Valo 506e76ac2bfSKalle Valo static int ath6kl_htc_tx_issue(struct htc_target *target, 507e76ac2bfSKalle Valo struct htc_packet *packet) 508e76ac2bfSKalle Valo { 509e76ac2bfSKalle Valo int status; 510e76ac2bfSKalle Valo bool sync = false; 511e76ac2bfSKalle Valo u32 padded_len, send_len; 512e76ac2bfSKalle Valo 513e76ac2bfSKalle Valo if (!packet->completion) 514e76ac2bfSKalle Valo sync = true; 515e76ac2bfSKalle Valo 516e76ac2bfSKalle Valo send_len = packet->act_len + HTC_HDR_LENGTH; 517e76ac2bfSKalle Valo 518e76ac2bfSKalle Valo padded_len = CALC_TXRX_PADDED_LEN(target, send_len); 519e76ac2bfSKalle Valo 520e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 521e76ac2bfSKalle Valo "htc tx issue len %d seqno %d padded_len %d mbox 0x%X %s\n", 522e76ac2bfSKalle Valo send_len, packet->info.tx.seqno, padded_len, 523e76ac2bfSKalle Valo target->dev->ar->mbox_info.htc_addr, 524e76ac2bfSKalle Valo sync ? "sync" : "async"); 525e76ac2bfSKalle Valo 526e76ac2bfSKalle Valo if (sync) { 527e76ac2bfSKalle Valo status = hif_read_write_sync(target->dev->ar, 528e76ac2bfSKalle Valo target->dev->ar->mbox_info.htc_addr, 529e76ac2bfSKalle Valo packet->buf, padded_len, 530e76ac2bfSKalle Valo HIF_WR_SYNC_BLOCK_INC); 531e76ac2bfSKalle Valo 532e76ac2bfSKalle Valo packet->status = status; 533e76ac2bfSKalle Valo packet->buf += HTC_HDR_LENGTH; 534e76ac2bfSKalle Valo } else 535e76ac2bfSKalle Valo status = hif_write_async(target->dev->ar, 536e76ac2bfSKalle Valo target->dev->ar->mbox_info.htc_addr, 537e76ac2bfSKalle Valo packet->buf, padded_len, 538e76ac2bfSKalle Valo HIF_WR_ASYNC_BLOCK_INC, packet); 539e76ac2bfSKalle Valo 540e76ac2bfSKalle Valo return status; 541e76ac2bfSKalle Valo } 542e76ac2bfSKalle Valo 543e76ac2bfSKalle Valo static int htc_check_credits(struct htc_target *target, 544e76ac2bfSKalle Valo struct htc_endpoint *ep, u8 *flags, 545e76ac2bfSKalle Valo enum htc_endpoint_id eid, unsigned int len, 546e76ac2bfSKalle Valo int *req_cred) 547e76ac2bfSKalle Valo { 548e76ac2bfSKalle Valo 549e76ac2bfSKalle Valo *req_cred = (len > target->tgt_cred_sz) ? 550e76ac2bfSKalle Valo DIV_ROUND_UP(len, target->tgt_cred_sz) : 1; 551e76ac2bfSKalle Valo 552e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit check need %d got %d\n", 553e76ac2bfSKalle Valo *req_cred, ep->cred_dist.credits); 554e76ac2bfSKalle Valo 555e76ac2bfSKalle Valo if (ep->cred_dist.credits < *req_cred) { 556e76ac2bfSKalle Valo if (eid == ENDPOINT_0) 557e76ac2bfSKalle Valo return -EINVAL; 558e76ac2bfSKalle Valo 559e76ac2bfSKalle Valo /* Seek more credits */ 560e76ac2bfSKalle Valo ep->cred_dist.seek_cred = *req_cred - ep->cred_dist.credits; 561e76ac2bfSKalle Valo 562e76ac2bfSKalle Valo ath6kl_credit_seek(target->credit_info, &ep->cred_dist); 563e76ac2bfSKalle Valo 564e76ac2bfSKalle Valo ep->cred_dist.seek_cred = 0; 565e76ac2bfSKalle Valo 566e76ac2bfSKalle Valo if (ep->cred_dist.credits < *req_cred) { 567e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, 568e76ac2bfSKalle Valo "credit not found for ep %d\n", 569e76ac2bfSKalle Valo eid); 570e76ac2bfSKalle Valo return -EINVAL; 571e76ac2bfSKalle Valo } 572e76ac2bfSKalle Valo } 573e76ac2bfSKalle Valo 574e76ac2bfSKalle Valo ep->cred_dist.credits -= *req_cred; 575e76ac2bfSKalle Valo ep->ep_st.cred_cosumd += *req_cred; 576e76ac2bfSKalle Valo 577e76ac2bfSKalle Valo /* When we are getting low on credits, ask for more */ 578e76ac2bfSKalle Valo if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { 579e76ac2bfSKalle Valo ep->cred_dist.seek_cred = 580e76ac2bfSKalle Valo ep->cred_dist.cred_per_msg - ep->cred_dist.credits; 581e76ac2bfSKalle Valo 582e76ac2bfSKalle Valo ath6kl_credit_seek(target->credit_info, &ep->cred_dist); 583e76ac2bfSKalle Valo 584e76ac2bfSKalle Valo /* see if we were successful in getting more */ 585e76ac2bfSKalle Valo if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { 586e76ac2bfSKalle Valo /* tell the target we need credits ASAP! */ 587e76ac2bfSKalle Valo *flags |= HTC_FLAGS_NEED_CREDIT_UPDATE; 588e76ac2bfSKalle Valo ep->ep_st.cred_low_indicate += 1; 589e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, 590e76ac2bfSKalle Valo "credit we need credits asap\n"); 591e76ac2bfSKalle Valo } 592e76ac2bfSKalle Valo } 593e76ac2bfSKalle Valo 594e76ac2bfSKalle Valo return 0; 595e76ac2bfSKalle Valo } 596e76ac2bfSKalle Valo 597e76ac2bfSKalle Valo static void ath6kl_htc_tx_pkts_get(struct htc_target *target, 598e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 599e76ac2bfSKalle Valo struct list_head *queue) 600e76ac2bfSKalle Valo { 601e76ac2bfSKalle Valo int req_cred; 602e76ac2bfSKalle Valo u8 flags; 603e76ac2bfSKalle Valo struct htc_packet *packet; 604e76ac2bfSKalle Valo unsigned int len; 605e76ac2bfSKalle Valo 606e76ac2bfSKalle Valo while (true) { 607e76ac2bfSKalle Valo 608e76ac2bfSKalle Valo flags = 0; 609e76ac2bfSKalle Valo 610e76ac2bfSKalle Valo if (list_empty(&endpoint->txq)) 611e76ac2bfSKalle Valo break; 612e76ac2bfSKalle Valo packet = list_first_entry(&endpoint->txq, struct htc_packet, 613e76ac2bfSKalle Valo list); 614e76ac2bfSKalle Valo 615e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 616e76ac2bfSKalle Valo "htc tx got packet 0x%p queue depth %d\n", 617e76ac2bfSKalle Valo packet, get_queue_depth(&endpoint->txq)); 618e76ac2bfSKalle Valo 619e76ac2bfSKalle Valo len = CALC_TXRX_PADDED_LEN(target, 620e76ac2bfSKalle Valo packet->act_len + HTC_HDR_LENGTH); 621e76ac2bfSKalle Valo 622e76ac2bfSKalle Valo if (htc_check_credits(target, endpoint, &flags, 623e76ac2bfSKalle Valo packet->endpoint, len, &req_cred)) 624e76ac2bfSKalle Valo break; 625e76ac2bfSKalle Valo 626e76ac2bfSKalle Valo /* now we can fully move onto caller's queue */ 627e76ac2bfSKalle Valo packet = list_first_entry(&endpoint->txq, struct htc_packet, 628e76ac2bfSKalle Valo list); 629e76ac2bfSKalle Valo list_move_tail(&packet->list, queue); 630e76ac2bfSKalle Valo 631e76ac2bfSKalle Valo /* save the number of credits this packet consumed */ 632e76ac2bfSKalle Valo packet->info.tx.cred_used = req_cred; 633e76ac2bfSKalle Valo 634e76ac2bfSKalle Valo /* all TX packets are handled asynchronously */ 635e76ac2bfSKalle Valo packet->completion = htc_tx_comp_handler; 636e76ac2bfSKalle Valo packet->context = target; 637e76ac2bfSKalle Valo endpoint->ep_st.tx_issued += 1; 638e76ac2bfSKalle Valo 639e76ac2bfSKalle Valo /* save send flags */ 640e76ac2bfSKalle Valo packet->info.tx.flags = flags; 641e76ac2bfSKalle Valo packet->info.tx.seqno = endpoint->seqno; 642e76ac2bfSKalle Valo endpoint->seqno++; 643e76ac2bfSKalle Valo } 644e76ac2bfSKalle Valo } 645e76ac2bfSKalle Valo 646e76ac2bfSKalle Valo /* See if the padded tx length falls on a credit boundary */ 647e76ac2bfSKalle Valo static int htc_get_credit_padding(unsigned int cred_sz, int *len, 648e76ac2bfSKalle Valo struct htc_endpoint *ep) 649e76ac2bfSKalle Valo { 650e76ac2bfSKalle Valo int rem_cred, cred_pad; 651e76ac2bfSKalle Valo 652e76ac2bfSKalle Valo rem_cred = *len % cred_sz; 653e76ac2bfSKalle Valo 654e76ac2bfSKalle Valo /* No padding needed */ 655e76ac2bfSKalle Valo if (!rem_cred) 656e76ac2bfSKalle Valo return 0; 657e76ac2bfSKalle Valo 658e76ac2bfSKalle Valo if (!(ep->conn_flags & HTC_FLGS_TX_BNDL_PAD_EN)) 659e76ac2bfSKalle Valo return -1; 660e76ac2bfSKalle Valo 661e76ac2bfSKalle Valo /* 662e76ac2bfSKalle Valo * The transfer consumes a "partial" credit, this 663e76ac2bfSKalle Valo * packet cannot be bundled unless we add 664e76ac2bfSKalle Valo * additional "dummy" padding (max 255 bytes) to 665e76ac2bfSKalle Valo * consume the entire credit. 666e76ac2bfSKalle Valo */ 667e76ac2bfSKalle Valo cred_pad = *len < cred_sz ? (cred_sz - *len) : rem_cred; 668e76ac2bfSKalle Valo 669e76ac2bfSKalle Valo if ((cred_pad > 0) && (cred_pad <= 255)) 670e76ac2bfSKalle Valo *len += cred_pad; 671e76ac2bfSKalle Valo else 672e76ac2bfSKalle Valo /* The amount of padding is too large, send as non-bundled */ 673e76ac2bfSKalle Valo return -1; 674e76ac2bfSKalle Valo 675e76ac2bfSKalle Valo return cred_pad; 676e76ac2bfSKalle Valo } 677e76ac2bfSKalle Valo 678e76ac2bfSKalle Valo static int ath6kl_htc_tx_setup_scat_list(struct htc_target *target, 679e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 680e76ac2bfSKalle Valo struct hif_scatter_req *scat_req, 681e76ac2bfSKalle Valo int n_scat, 682e76ac2bfSKalle Valo struct list_head *queue) 683e76ac2bfSKalle Valo { 684e76ac2bfSKalle Valo struct htc_packet *packet; 685e76ac2bfSKalle Valo int i, len, rem_scat, cred_pad; 686e76ac2bfSKalle Valo int status = 0; 687e76ac2bfSKalle Valo u8 flags; 688e76ac2bfSKalle Valo 689e76ac2bfSKalle Valo rem_scat = target->max_tx_bndl_sz; 690e76ac2bfSKalle Valo 691e76ac2bfSKalle Valo for (i = 0; i < n_scat; i++) { 692e76ac2bfSKalle Valo scat_req->scat_list[i].packet = NULL; 693e76ac2bfSKalle Valo 694e76ac2bfSKalle Valo if (list_empty(queue)) 695e76ac2bfSKalle Valo break; 696e76ac2bfSKalle Valo 697e76ac2bfSKalle Valo packet = list_first_entry(queue, struct htc_packet, list); 698e76ac2bfSKalle Valo len = CALC_TXRX_PADDED_LEN(target, 699e76ac2bfSKalle Valo packet->act_len + HTC_HDR_LENGTH); 700e76ac2bfSKalle Valo 701e76ac2bfSKalle Valo cred_pad = htc_get_credit_padding(target->tgt_cred_sz, 702e76ac2bfSKalle Valo &len, endpoint); 703e76ac2bfSKalle Valo if (cred_pad < 0 || rem_scat < len) { 704e76ac2bfSKalle Valo status = -ENOSPC; 705e76ac2bfSKalle Valo break; 706e76ac2bfSKalle Valo } 707e76ac2bfSKalle Valo 708e76ac2bfSKalle Valo rem_scat -= len; 709e76ac2bfSKalle Valo /* now remove it from the queue */ 710e76ac2bfSKalle Valo list_del(&packet->list); 711e76ac2bfSKalle Valo 712e76ac2bfSKalle Valo scat_req->scat_list[i].packet = packet; 713e76ac2bfSKalle Valo /* prepare packet and flag message as part of a send bundle */ 714e76ac2bfSKalle Valo flags = packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE; 715e76ac2bfSKalle Valo ath6kl_htc_tx_prep_pkt(packet, flags, 716e76ac2bfSKalle Valo cred_pad, packet->info.tx.seqno); 717e76ac2bfSKalle Valo /* Make sure the buffer is 4-byte aligned */ 718e76ac2bfSKalle Valo ath6kl_htc_tx_buf_align(&packet->buf, 719e76ac2bfSKalle Valo packet->act_len + HTC_HDR_LENGTH); 720e76ac2bfSKalle Valo scat_req->scat_list[i].buf = packet->buf; 721e76ac2bfSKalle Valo scat_req->scat_list[i].len = len; 722e76ac2bfSKalle Valo 723e76ac2bfSKalle Valo scat_req->len += len; 724e76ac2bfSKalle Valo scat_req->scat_entries++; 725e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 726e76ac2bfSKalle Valo "htc tx adding (%d) pkt 0x%p seqno %d len %d remaining %d\n", 727e76ac2bfSKalle Valo i, packet, packet->info.tx.seqno, len, rem_scat); 728e76ac2bfSKalle Valo } 729e76ac2bfSKalle Valo 730e76ac2bfSKalle Valo /* Roll back scatter setup in case of any failure */ 731e76ac2bfSKalle Valo if (scat_req->scat_entries < HTC_MIN_HTC_MSGS_TO_BUNDLE) { 732e76ac2bfSKalle Valo for (i = scat_req->scat_entries - 1; i >= 0; i--) { 733e76ac2bfSKalle Valo packet = scat_req->scat_list[i].packet; 734e76ac2bfSKalle Valo if (packet) { 735e76ac2bfSKalle Valo packet->buf += HTC_HDR_LENGTH; 736e76ac2bfSKalle Valo list_add(&packet->list, queue); 737e76ac2bfSKalle Valo } 738e76ac2bfSKalle Valo } 739e76ac2bfSKalle Valo return -EAGAIN; 740e76ac2bfSKalle Valo } 741e76ac2bfSKalle Valo 742e76ac2bfSKalle Valo return status; 743e76ac2bfSKalle Valo } 744e76ac2bfSKalle Valo 745e76ac2bfSKalle Valo /* 746e76ac2bfSKalle Valo * Drain a queue and send as bundles this function may return without fully 747e76ac2bfSKalle Valo * draining the queue when 748e76ac2bfSKalle Valo * 749e76ac2bfSKalle Valo * 1. scatter resources are exhausted 750e76ac2bfSKalle Valo * 2. a message that will consume a partial credit will stop the 751e76ac2bfSKalle Valo * bundling process early 752e76ac2bfSKalle Valo * 3. we drop below the minimum number of messages for a bundle 753e76ac2bfSKalle Valo */ 754e76ac2bfSKalle Valo static void ath6kl_htc_tx_bundle(struct htc_endpoint *endpoint, 755e76ac2bfSKalle Valo struct list_head *queue, 756e76ac2bfSKalle Valo int *sent_bundle, int *n_bundle_pkts) 757e76ac2bfSKalle Valo { 758e76ac2bfSKalle Valo struct htc_target *target = endpoint->target; 759e76ac2bfSKalle Valo struct hif_scatter_req *scat_req = NULL; 760e76ac2bfSKalle Valo int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0; 761e76ac2bfSKalle Valo int status; 762e76ac2bfSKalle Valo u32 txb_mask; 763e76ac2bfSKalle Valo u8 ac = WMM_NUM_AC; 764e76ac2bfSKalle Valo 7653acabc88SDan Carpenter if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && 766e76ac2bfSKalle Valo (WMI_CONTROL_SVC != endpoint->svc_id)) 767e76ac2bfSKalle Valo ac = target->dev->ar->ep2ac_map[endpoint->eid]; 768e76ac2bfSKalle Valo 769e76ac2bfSKalle Valo while (true) { 770e76ac2bfSKalle Valo status = 0; 771e76ac2bfSKalle Valo n_scat = get_queue_depth(queue); 772e76ac2bfSKalle Valo n_scat = min(n_scat, target->msg_per_bndl_max); 773e76ac2bfSKalle Valo 774e76ac2bfSKalle Valo if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE) 775e76ac2bfSKalle Valo /* not enough to bundle */ 776e76ac2bfSKalle Valo break; 777e76ac2bfSKalle Valo 778e76ac2bfSKalle Valo scat_req = hif_scatter_req_get(target->dev->ar); 779e76ac2bfSKalle Valo 780e76ac2bfSKalle Valo if (!scat_req) { 781e76ac2bfSKalle Valo /* no scatter resources */ 782e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 783e76ac2bfSKalle Valo "htc tx no more scatter resources\n"); 784e76ac2bfSKalle Valo break; 785e76ac2bfSKalle Valo } 786e76ac2bfSKalle Valo 787e76ac2bfSKalle Valo if ((ac < WMM_NUM_AC) && (ac != WMM_AC_BK)) { 788e76ac2bfSKalle Valo if (WMM_AC_BE == ac) 789e76ac2bfSKalle Valo /* 790e76ac2bfSKalle Valo * BE, BK have priorities and bit 791e76ac2bfSKalle Valo * positions reversed 792e76ac2bfSKalle Valo */ 793e76ac2bfSKalle Valo txb_mask = (1 << WMM_AC_BK); 794e76ac2bfSKalle Valo else 795e76ac2bfSKalle Valo /* 796e76ac2bfSKalle Valo * any AC with priority lower than 797e76ac2bfSKalle Valo * itself 798e76ac2bfSKalle Valo */ 799e76ac2bfSKalle Valo txb_mask = ((1 << ac) - 1); 800b86aeb50SDan Carpenter 801e76ac2bfSKalle Valo /* 802e76ac2bfSKalle Valo * when the scatter request resources drop below a 803e76ac2bfSKalle Valo * certain threshold, disable Tx bundling for all 804e76ac2bfSKalle Valo * AC's with priority lower than the current requesting 805e76ac2bfSKalle Valo * AC. Otherwise re-enable Tx bundling for them 806e76ac2bfSKalle Valo */ 807e76ac2bfSKalle Valo if (scat_req->scat_q_depth < ATH6KL_SCATTER_REQS) 808e76ac2bfSKalle Valo target->tx_bndl_mask &= ~txb_mask; 809e76ac2bfSKalle Valo else 810e76ac2bfSKalle Valo target->tx_bndl_mask |= txb_mask; 811e76ac2bfSKalle Valo } 812e76ac2bfSKalle Valo 813e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx pkts to scatter: %d\n", 814e76ac2bfSKalle Valo n_scat); 815e76ac2bfSKalle Valo 816e76ac2bfSKalle Valo scat_req->len = 0; 817e76ac2bfSKalle Valo scat_req->scat_entries = 0; 818e76ac2bfSKalle Valo 819e76ac2bfSKalle Valo status = ath6kl_htc_tx_setup_scat_list(target, endpoint, 820e76ac2bfSKalle Valo scat_req, n_scat, 821e76ac2bfSKalle Valo queue); 822e76ac2bfSKalle Valo if (status == -EAGAIN) { 823e76ac2bfSKalle Valo hif_scatter_req_add(target->dev->ar, scat_req); 824e76ac2bfSKalle Valo break; 825e76ac2bfSKalle Valo } 826e76ac2bfSKalle Valo 827e76ac2bfSKalle Valo /* send path is always asynchronous */ 828e76ac2bfSKalle Valo scat_req->complete = htc_async_tx_scat_complete; 829e76ac2bfSKalle Valo n_sent_bundle++; 830e76ac2bfSKalle Valo tot_pkts_bundle += scat_req->scat_entries; 831e76ac2bfSKalle Valo 832e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 833e76ac2bfSKalle Valo "htc tx scatter bytes %d entries %d\n", 834e76ac2bfSKalle Valo scat_req->len, scat_req->scat_entries); 835e76ac2bfSKalle Valo ath6kl_hif_submit_scat_req(target->dev, scat_req, false); 836e76ac2bfSKalle Valo 837e76ac2bfSKalle Valo if (status) 838e76ac2bfSKalle Valo break; 839e76ac2bfSKalle Valo } 840e76ac2bfSKalle Valo 841e76ac2bfSKalle Valo *sent_bundle = n_sent_bundle; 842e76ac2bfSKalle Valo *n_bundle_pkts = tot_pkts_bundle; 843e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx bundle sent %d pkts\n", 844e76ac2bfSKalle Valo n_sent_bundle); 845e76ac2bfSKalle Valo 846e76ac2bfSKalle Valo return; 847e76ac2bfSKalle Valo } 848e76ac2bfSKalle Valo 849e76ac2bfSKalle Valo static void ath6kl_htc_tx_from_queue(struct htc_target *target, 850e76ac2bfSKalle Valo struct htc_endpoint *endpoint) 851e76ac2bfSKalle Valo { 852e76ac2bfSKalle Valo struct list_head txq; 853e76ac2bfSKalle Valo struct htc_packet *packet; 854e76ac2bfSKalle Valo int bundle_sent; 855e76ac2bfSKalle Valo int n_pkts_bundle; 856e76ac2bfSKalle Valo u8 ac = WMM_NUM_AC; 85793b42caeSVasanthakumar Thiagarajan int status; 858e76ac2bfSKalle Valo 859e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 860e76ac2bfSKalle Valo 861e76ac2bfSKalle Valo endpoint->tx_proc_cnt++; 862e76ac2bfSKalle Valo if (endpoint->tx_proc_cnt > 1) { 863e76ac2bfSKalle Valo endpoint->tx_proc_cnt--; 864e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 865e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx busy\n"); 866e76ac2bfSKalle Valo return; 867e76ac2bfSKalle Valo } 868e76ac2bfSKalle Valo 869e76ac2bfSKalle Valo /* 870e76ac2bfSKalle Valo * drain the endpoint TX queue for transmission as long 871e76ac2bfSKalle Valo * as we have enough credits. 872e76ac2bfSKalle Valo */ 873e76ac2bfSKalle Valo INIT_LIST_HEAD(&txq); 874e76ac2bfSKalle Valo 8753acabc88SDan Carpenter if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && 876e76ac2bfSKalle Valo (WMI_CONTROL_SVC != endpoint->svc_id)) 877e76ac2bfSKalle Valo ac = target->dev->ar->ep2ac_map[endpoint->eid]; 878e76ac2bfSKalle Valo 879e76ac2bfSKalle Valo while (true) { 880e76ac2bfSKalle Valo 881e76ac2bfSKalle Valo if (list_empty(&endpoint->txq)) 882e76ac2bfSKalle Valo break; 883e76ac2bfSKalle Valo 884e76ac2bfSKalle Valo ath6kl_htc_tx_pkts_get(target, endpoint, &txq); 885e76ac2bfSKalle Valo 886e76ac2bfSKalle Valo if (list_empty(&txq)) 887e76ac2bfSKalle Valo break; 888e76ac2bfSKalle Valo 889e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 890e76ac2bfSKalle Valo 891e76ac2bfSKalle Valo bundle_sent = 0; 892e76ac2bfSKalle Valo n_pkts_bundle = 0; 893e76ac2bfSKalle Valo 894e76ac2bfSKalle Valo while (true) { 895e76ac2bfSKalle Valo /* try to send a bundle on each pass */ 896e76ac2bfSKalle Valo if ((target->tx_bndl_mask) && 897e76ac2bfSKalle Valo (get_queue_depth(&txq) >= 898e76ac2bfSKalle Valo HTC_MIN_HTC_MSGS_TO_BUNDLE)) { 899e76ac2bfSKalle Valo int temp1 = 0, temp2 = 0; 900e76ac2bfSKalle Valo 901e76ac2bfSKalle Valo /* check if bundling is enabled for an AC */ 902e76ac2bfSKalle Valo if (target->tx_bndl_mask & (1 << ac)) { 903e76ac2bfSKalle Valo ath6kl_htc_tx_bundle(endpoint, &txq, 904e76ac2bfSKalle Valo &temp1, &temp2); 905e76ac2bfSKalle Valo bundle_sent += temp1; 906e76ac2bfSKalle Valo n_pkts_bundle += temp2; 907e76ac2bfSKalle Valo } 908e76ac2bfSKalle Valo } 909e76ac2bfSKalle Valo 910e76ac2bfSKalle Valo if (list_empty(&txq)) 911e76ac2bfSKalle Valo break; 912e76ac2bfSKalle Valo 913e76ac2bfSKalle Valo packet = list_first_entry(&txq, struct htc_packet, 914e76ac2bfSKalle Valo list); 915e76ac2bfSKalle Valo list_del(&packet->list); 916e76ac2bfSKalle Valo 917e76ac2bfSKalle Valo ath6kl_htc_tx_prep_pkt(packet, packet->info.tx.flags, 918e76ac2bfSKalle Valo 0, packet->info.tx.seqno); 91993b42caeSVasanthakumar Thiagarajan status = ath6kl_htc_tx_issue(target, packet); 92093b42caeSVasanthakumar Thiagarajan 92193b42caeSVasanthakumar Thiagarajan if (status) { 92293b42caeSVasanthakumar Thiagarajan packet->status = status; 92393b42caeSVasanthakumar Thiagarajan packet->completion(packet->context, packet); 92493b42caeSVasanthakumar Thiagarajan } 925e76ac2bfSKalle Valo } 926e76ac2bfSKalle Valo 927e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 928e76ac2bfSKalle Valo 929e76ac2bfSKalle Valo endpoint->ep_st.tx_bundles += bundle_sent; 930e76ac2bfSKalle Valo endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle; 931e76ac2bfSKalle Valo 932e76ac2bfSKalle Valo /* 933e76ac2bfSKalle Valo * if an AC has bundling disabled and no tx bundling 934e76ac2bfSKalle Valo * has occured continously for a certain number of TX, 935e76ac2bfSKalle Valo * enable tx bundling for this AC 936e76ac2bfSKalle Valo */ 937e76ac2bfSKalle Valo if (!bundle_sent) { 938e76ac2bfSKalle Valo if (!(target->tx_bndl_mask & (1 << ac)) && 939e76ac2bfSKalle Valo (ac < WMM_NUM_AC)) { 940e76ac2bfSKalle Valo if (++target->ac_tx_count[ac] >= 941e76ac2bfSKalle Valo TX_RESUME_BUNDLE_THRESHOLD) { 942e76ac2bfSKalle Valo target->ac_tx_count[ac] = 0; 943e76ac2bfSKalle Valo target->tx_bndl_mask |= (1 << ac); 944e76ac2bfSKalle Valo } 945e76ac2bfSKalle Valo } 946e76ac2bfSKalle Valo } else { 947e76ac2bfSKalle Valo /* tx bundling will reset the counter */ 948e76ac2bfSKalle Valo if (ac < WMM_NUM_AC) 949e76ac2bfSKalle Valo target->ac_tx_count[ac] = 0; 950e76ac2bfSKalle Valo } 951e76ac2bfSKalle Valo } 952e76ac2bfSKalle Valo 953e76ac2bfSKalle Valo endpoint->tx_proc_cnt = 0; 954e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 955e76ac2bfSKalle Valo } 956e76ac2bfSKalle Valo 957e76ac2bfSKalle Valo static bool ath6kl_htc_tx_try(struct htc_target *target, 958e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 959e76ac2bfSKalle Valo struct htc_packet *tx_pkt) 960e76ac2bfSKalle Valo { 961e76ac2bfSKalle Valo struct htc_ep_callbacks ep_cb; 962e76ac2bfSKalle Valo int txq_depth; 963e76ac2bfSKalle Valo bool overflow = false; 964e76ac2bfSKalle Valo 965e76ac2bfSKalle Valo ep_cb = endpoint->ep_cb; 966e76ac2bfSKalle Valo 967e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 968e76ac2bfSKalle Valo txq_depth = get_queue_depth(&endpoint->txq); 969e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 970e76ac2bfSKalle Valo 971e76ac2bfSKalle Valo if (txq_depth >= endpoint->max_txq_depth) 972e76ac2bfSKalle Valo overflow = true; 973e76ac2bfSKalle Valo 974e76ac2bfSKalle Valo if (overflow) 975e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 976e76ac2bfSKalle Valo "htc tx overflow ep %d depth %d max %d\n", 977e76ac2bfSKalle Valo endpoint->eid, txq_depth, 978e76ac2bfSKalle Valo endpoint->max_txq_depth); 979e76ac2bfSKalle Valo 980e76ac2bfSKalle Valo if (overflow && ep_cb.tx_full) { 981e76ac2bfSKalle Valo if (ep_cb.tx_full(endpoint->target, tx_pkt) == 982e76ac2bfSKalle Valo HTC_SEND_FULL_DROP) { 983e76ac2bfSKalle Valo endpoint->ep_st.tx_dropped += 1; 984e76ac2bfSKalle Valo return false; 985e76ac2bfSKalle Valo } 986e76ac2bfSKalle Valo } 987e76ac2bfSKalle Valo 988e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 989e76ac2bfSKalle Valo list_add_tail(&tx_pkt->list, &endpoint->txq); 990e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 991e76ac2bfSKalle Valo 992e76ac2bfSKalle Valo ath6kl_htc_tx_from_queue(target, endpoint); 993e76ac2bfSKalle Valo 994e76ac2bfSKalle Valo return true; 995e76ac2bfSKalle Valo } 996e76ac2bfSKalle Valo 997e76ac2bfSKalle Valo static void htc_chk_ep_txq(struct htc_target *target) 998e76ac2bfSKalle Valo { 999e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 1000e76ac2bfSKalle Valo struct htc_endpoint_credit_dist *cred_dist; 1001e76ac2bfSKalle Valo 1002e76ac2bfSKalle Valo /* 1003e76ac2bfSKalle Valo * Run through the credit distribution list to see if there are 1004e76ac2bfSKalle Valo * packets queued. NOTE: no locks need to be taken since the 1005e76ac2bfSKalle Valo * distribution list is not dynamic (cannot be re-ordered) and we 1006e76ac2bfSKalle Valo * are not modifying any state. 1007e76ac2bfSKalle Valo */ 1008e76ac2bfSKalle Valo list_for_each_entry(cred_dist, &target->cred_dist_list, list) { 1009e76ac2bfSKalle Valo endpoint = cred_dist->htc_ep; 1010e76ac2bfSKalle Valo 1011e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 1012e76ac2bfSKalle Valo if (!list_empty(&endpoint->txq)) { 1013e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1014e76ac2bfSKalle Valo "htc creds ep %d credits %d pkts %d\n", 1015e76ac2bfSKalle Valo cred_dist->endpoint, 1016e76ac2bfSKalle Valo endpoint->cred_dist.credits, 1017e76ac2bfSKalle Valo get_queue_depth(&endpoint->txq)); 1018e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1019e76ac2bfSKalle Valo /* 1020e76ac2bfSKalle Valo * Try to start the stalled queue, this list is 1021e76ac2bfSKalle Valo * ordered by priority. If there are credits 1022e76ac2bfSKalle Valo * available the highest priority queue will get a 1023e76ac2bfSKalle Valo * chance to reclaim credits from lower priority 1024e76ac2bfSKalle Valo * ones. 1025e76ac2bfSKalle Valo */ 1026e76ac2bfSKalle Valo ath6kl_htc_tx_from_queue(target, endpoint); 1027e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 1028e76ac2bfSKalle Valo } 1029e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1030e76ac2bfSKalle Valo } 1031e76ac2bfSKalle Valo } 1032e76ac2bfSKalle Valo 1033e76ac2bfSKalle Valo static int htc_setup_tx_complete(struct htc_target *target) 1034e76ac2bfSKalle Valo { 1035e76ac2bfSKalle Valo struct htc_packet *send_pkt = NULL; 1036e76ac2bfSKalle Valo int status; 1037e76ac2bfSKalle Valo 1038e76ac2bfSKalle Valo send_pkt = htc_get_control_buf(target, true); 1039e76ac2bfSKalle Valo 1040e76ac2bfSKalle Valo if (!send_pkt) 1041e76ac2bfSKalle Valo return -ENOMEM; 1042e76ac2bfSKalle Valo 1043e76ac2bfSKalle Valo if (target->htc_tgt_ver >= HTC_VERSION_2P1) { 1044e76ac2bfSKalle Valo struct htc_setup_comp_ext_msg *setup_comp_ext; 1045e76ac2bfSKalle Valo u32 flags = 0; 1046e76ac2bfSKalle Valo 1047e76ac2bfSKalle Valo setup_comp_ext = 1048e76ac2bfSKalle Valo (struct htc_setup_comp_ext_msg *)send_pkt->buf; 1049e76ac2bfSKalle Valo memset(setup_comp_ext, 0, sizeof(*setup_comp_ext)); 1050e76ac2bfSKalle Valo setup_comp_ext->msg_id = 1051e76ac2bfSKalle Valo cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID); 1052e76ac2bfSKalle Valo 1053e76ac2bfSKalle Valo if (target->msg_per_bndl_max > 0) { 1054e76ac2bfSKalle Valo /* Indicate HTC bundling to the target */ 1055e76ac2bfSKalle Valo flags |= HTC_SETUP_COMP_FLG_RX_BNDL_EN; 1056e76ac2bfSKalle Valo setup_comp_ext->msg_per_rxbndl = 1057e76ac2bfSKalle Valo target->msg_per_bndl_max; 1058e76ac2bfSKalle Valo } 1059e76ac2bfSKalle Valo 1060e76ac2bfSKalle Valo memcpy(&setup_comp_ext->flags, &flags, 1061e76ac2bfSKalle Valo sizeof(setup_comp_ext->flags)); 1062e76ac2bfSKalle Valo set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp_ext, 1063e76ac2bfSKalle Valo sizeof(struct htc_setup_comp_ext_msg), 1064e76ac2bfSKalle Valo ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); 1065e76ac2bfSKalle Valo 1066e76ac2bfSKalle Valo } else { 1067e76ac2bfSKalle Valo struct htc_setup_comp_msg *setup_comp; 1068e76ac2bfSKalle Valo setup_comp = (struct htc_setup_comp_msg *)send_pkt->buf; 1069e76ac2bfSKalle Valo memset(setup_comp, 0, sizeof(struct htc_setup_comp_msg)); 1070e76ac2bfSKalle Valo setup_comp->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_ID); 1071e76ac2bfSKalle Valo set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp, 1072e76ac2bfSKalle Valo sizeof(struct htc_setup_comp_msg), 1073e76ac2bfSKalle Valo ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); 1074e76ac2bfSKalle Valo } 1075e76ac2bfSKalle Valo 1076e76ac2bfSKalle Valo /* we want synchronous operation */ 1077e76ac2bfSKalle Valo send_pkt->completion = NULL; 1078e76ac2bfSKalle Valo ath6kl_htc_tx_prep_pkt(send_pkt, 0, 0, 0); 1079e76ac2bfSKalle Valo status = ath6kl_htc_tx_issue(target, send_pkt); 1080e76ac2bfSKalle Valo 1081e76ac2bfSKalle Valo if (send_pkt != NULL) 1082e76ac2bfSKalle Valo htc_reclaim_txctrl_buf(target, send_pkt); 1083e76ac2bfSKalle Valo 1084e76ac2bfSKalle Valo return status; 1085e76ac2bfSKalle Valo } 1086e76ac2bfSKalle Valo 1087e76ac2bfSKalle Valo static void ath6kl_htc_set_credit_dist(struct htc_target *target, 1088e76ac2bfSKalle Valo struct ath6kl_htc_credit_info *credit_info, 1089e76ac2bfSKalle Valo u16 srvc_pri_order[], int list_len) 1090e76ac2bfSKalle Valo { 1091e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 1092e76ac2bfSKalle Valo int i, ep; 1093e76ac2bfSKalle Valo 1094e76ac2bfSKalle Valo target->credit_info = credit_info; 1095e76ac2bfSKalle Valo 1096e76ac2bfSKalle Valo list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list, 1097e76ac2bfSKalle Valo &target->cred_dist_list); 1098e76ac2bfSKalle Valo 1099e76ac2bfSKalle Valo for (i = 0; i < list_len; i++) { 1100e76ac2bfSKalle Valo for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { 1101e76ac2bfSKalle Valo endpoint = &target->endpoint[ep]; 1102e76ac2bfSKalle Valo if (endpoint->svc_id == srvc_pri_order[i]) { 1103e76ac2bfSKalle Valo list_add_tail(&endpoint->cred_dist.list, 1104e76ac2bfSKalle Valo &target->cred_dist_list); 1105e76ac2bfSKalle Valo break; 1106e76ac2bfSKalle Valo } 1107e76ac2bfSKalle Valo } 1108e76ac2bfSKalle Valo if (ep >= ENDPOINT_MAX) { 1109e76ac2bfSKalle Valo WARN_ON(1); 1110e76ac2bfSKalle Valo return; 1111e76ac2bfSKalle Valo } 1112e76ac2bfSKalle Valo } 1113e76ac2bfSKalle Valo } 1114e76ac2bfSKalle Valo 1115e76ac2bfSKalle Valo static int ath6kl_htc_mbox_tx(struct htc_target *target, 1116e76ac2bfSKalle Valo struct htc_packet *packet) 1117e76ac2bfSKalle Valo { 1118e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 1119e76ac2bfSKalle Valo struct list_head queue; 1120e76ac2bfSKalle Valo 1121e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1122e76ac2bfSKalle Valo "htc tx ep id %d buf 0x%p len %d\n", 1123e76ac2bfSKalle Valo packet->endpoint, packet->buf, packet->act_len); 1124e76ac2bfSKalle Valo 1125e76ac2bfSKalle Valo if (packet->endpoint >= ENDPOINT_MAX) { 1126e76ac2bfSKalle Valo WARN_ON(1); 1127e76ac2bfSKalle Valo return -EINVAL; 1128e76ac2bfSKalle Valo } 1129e76ac2bfSKalle Valo 1130e76ac2bfSKalle Valo endpoint = &target->endpoint[packet->endpoint]; 1131e76ac2bfSKalle Valo 1132e76ac2bfSKalle Valo if (!ath6kl_htc_tx_try(target, endpoint, packet)) { 1133e76ac2bfSKalle Valo packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ? 1134e76ac2bfSKalle Valo -ECANCELED : -ENOSPC; 1135e76ac2bfSKalle Valo INIT_LIST_HEAD(&queue); 1136e76ac2bfSKalle Valo list_add(&packet->list, &queue); 1137e76ac2bfSKalle Valo htc_tx_complete(endpoint, &queue); 1138e76ac2bfSKalle Valo } 1139e76ac2bfSKalle Valo 1140e76ac2bfSKalle Valo return 0; 1141e76ac2bfSKalle Valo } 1142e76ac2bfSKalle Valo 1143e76ac2bfSKalle Valo /* flush endpoint TX queue */ 1144e76ac2bfSKalle Valo static void ath6kl_htc_mbox_flush_txep(struct htc_target *target, 1145e76ac2bfSKalle Valo enum htc_endpoint_id eid, u16 tag) 1146e76ac2bfSKalle Valo { 1147e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 1148e76ac2bfSKalle Valo struct list_head discard_q, container; 1149e76ac2bfSKalle Valo struct htc_endpoint *endpoint = &target->endpoint[eid]; 1150e76ac2bfSKalle Valo 1151e76ac2bfSKalle Valo if (!endpoint->svc_id) { 1152e76ac2bfSKalle Valo WARN_ON(1); 1153e76ac2bfSKalle Valo return; 1154e76ac2bfSKalle Valo } 1155e76ac2bfSKalle Valo 1156e76ac2bfSKalle Valo /* initialize the discard queue */ 1157e76ac2bfSKalle Valo INIT_LIST_HEAD(&discard_q); 1158e76ac2bfSKalle Valo 1159e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 1160e76ac2bfSKalle Valo 1161e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, &endpoint->txq, list) { 1162e76ac2bfSKalle Valo if ((tag == HTC_TX_PACKET_TAG_ALL) || 1163e76ac2bfSKalle Valo (tag == packet->info.tx.tag)) 1164e76ac2bfSKalle Valo list_move_tail(&packet->list, &discard_q); 1165e76ac2bfSKalle Valo } 1166e76ac2bfSKalle Valo 1167e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1168e76ac2bfSKalle Valo 1169e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, &discard_q, list) { 1170e76ac2bfSKalle Valo packet->status = -ECANCELED; 1171e76ac2bfSKalle Valo list_del(&packet->list); 1172e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1173e76ac2bfSKalle Valo "htc tx flushing pkt 0x%p len %d ep %d tag 0x%x\n", 1174e76ac2bfSKalle Valo packet, packet->act_len, 1175e76ac2bfSKalle Valo packet->endpoint, packet->info.tx.tag); 1176e76ac2bfSKalle Valo 1177e76ac2bfSKalle Valo INIT_LIST_HEAD(&container); 1178e76ac2bfSKalle Valo list_add_tail(&packet->list, &container); 1179e76ac2bfSKalle Valo htc_tx_complete(endpoint, &container); 1180e76ac2bfSKalle Valo } 1181e76ac2bfSKalle Valo 1182e76ac2bfSKalle Valo } 1183e76ac2bfSKalle Valo 1184e76ac2bfSKalle Valo static void ath6kl_htc_flush_txep_all(struct htc_target *target) 1185e76ac2bfSKalle Valo { 1186e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 1187e76ac2bfSKalle Valo int i; 1188e76ac2bfSKalle Valo 1189e76ac2bfSKalle Valo dump_cred_dist_stats(target); 1190e76ac2bfSKalle Valo 1191e76ac2bfSKalle Valo for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { 1192e76ac2bfSKalle Valo endpoint = &target->endpoint[i]; 1193e76ac2bfSKalle Valo if (endpoint->svc_id == 0) 1194e76ac2bfSKalle Valo /* not in use.. */ 1195e76ac2bfSKalle Valo continue; 1196e76ac2bfSKalle Valo ath6kl_htc_mbox_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL); 1197e76ac2bfSKalle Valo } 1198e76ac2bfSKalle Valo } 1199e76ac2bfSKalle Valo 1200e76ac2bfSKalle Valo static void ath6kl_htc_mbox_activity_changed(struct htc_target *target, 1201e76ac2bfSKalle Valo enum htc_endpoint_id eid, 1202e76ac2bfSKalle Valo bool active) 1203e76ac2bfSKalle Valo { 1204e76ac2bfSKalle Valo struct htc_endpoint *endpoint = &target->endpoint[eid]; 1205e76ac2bfSKalle Valo bool dist = false; 1206e76ac2bfSKalle Valo 1207e76ac2bfSKalle Valo if (endpoint->svc_id == 0) { 1208e76ac2bfSKalle Valo WARN_ON(1); 1209e76ac2bfSKalle Valo return; 1210e76ac2bfSKalle Valo } 1211e76ac2bfSKalle Valo 1212e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 1213e76ac2bfSKalle Valo 1214e76ac2bfSKalle Valo if (active) { 1215e76ac2bfSKalle Valo if (!(endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE)) { 1216e76ac2bfSKalle Valo endpoint->cred_dist.dist_flags |= HTC_EP_ACTIVE; 1217e76ac2bfSKalle Valo dist = true; 1218e76ac2bfSKalle Valo } 1219e76ac2bfSKalle Valo } else { 1220e76ac2bfSKalle Valo if (endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE) { 1221e76ac2bfSKalle Valo endpoint->cred_dist.dist_flags &= ~HTC_EP_ACTIVE; 1222e76ac2bfSKalle Valo dist = true; 1223e76ac2bfSKalle Valo } 1224e76ac2bfSKalle Valo } 1225e76ac2bfSKalle Valo 1226e76ac2bfSKalle Valo if (dist) { 1227e76ac2bfSKalle Valo endpoint->cred_dist.txq_depth = 1228e76ac2bfSKalle Valo get_queue_depth(&endpoint->txq); 1229e76ac2bfSKalle Valo 1230e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1231e76ac2bfSKalle Valo "htc tx activity ctxt 0x%p dist 0x%p\n", 1232e76ac2bfSKalle Valo target->credit_info, &target->cred_dist_list); 1233e76ac2bfSKalle Valo 1234e76ac2bfSKalle Valo ath6kl_credit_distribute(target->credit_info, 1235e76ac2bfSKalle Valo &target->cred_dist_list, 1236e76ac2bfSKalle Valo HTC_CREDIT_DIST_ACTIVITY_CHANGE); 1237e76ac2bfSKalle Valo } 1238e76ac2bfSKalle Valo 1239e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1240e76ac2bfSKalle Valo 1241e76ac2bfSKalle Valo if (dist && !active) 1242e76ac2bfSKalle Valo htc_chk_ep_txq(target); 1243e76ac2bfSKalle Valo } 1244e76ac2bfSKalle Valo 1245e76ac2bfSKalle Valo /* HTC Rx */ 1246e76ac2bfSKalle Valo 1247e76ac2bfSKalle Valo static inline void ath6kl_htc_rx_update_stats(struct htc_endpoint *endpoint, 1248e76ac2bfSKalle Valo int n_look_ahds) 1249e76ac2bfSKalle Valo { 1250e76ac2bfSKalle Valo endpoint->ep_st.rx_pkts++; 1251e76ac2bfSKalle Valo if (n_look_ahds == 1) 1252e76ac2bfSKalle Valo endpoint->ep_st.rx_lkahds++; 1253e76ac2bfSKalle Valo else if (n_look_ahds > 1) 1254e76ac2bfSKalle Valo endpoint->ep_st.rx_bundle_lkahd++; 1255e76ac2bfSKalle Valo } 1256e76ac2bfSKalle Valo 1257e76ac2bfSKalle Valo static inline bool htc_valid_rx_frame_len(struct htc_target *target, 1258e76ac2bfSKalle Valo enum htc_endpoint_id eid, int len) 1259e76ac2bfSKalle Valo { 1260e76ac2bfSKalle Valo return (eid == target->dev->ar->ctrl_ep) ? 1261e76ac2bfSKalle Valo len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE; 1262e76ac2bfSKalle Valo } 1263e76ac2bfSKalle Valo 1264e76ac2bfSKalle Valo static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet) 1265e76ac2bfSKalle Valo { 1266e76ac2bfSKalle Valo struct list_head queue; 1267e76ac2bfSKalle Valo 1268e76ac2bfSKalle Valo INIT_LIST_HEAD(&queue); 1269e76ac2bfSKalle Valo list_add_tail(&packet->list, &queue); 1270e76ac2bfSKalle Valo return ath6kl_htc_mbox_add_rxbuf_multiple(target, &queue); 1271e76ac2bfSKalle Valo } 1272e76ac2bfSKalle Valo 1273e76ac2bfSKalle Valo static void htc_reclaim_rxbuf(struct htc_target *target, 1274e76ac2bfSKalle Valo struct htc_packet *packet, 1275e76ac2bfSKalle Valo struct htc_endpoint *ep) 1276e76ac2bfSKalle Valo { 1277e76ac2bfSKalle Valo if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) { 1278e76ac2bfSKalle Valo htc_rxpkt_reset(packet); 1279e76ac2bfSKalle Valo packet->status = -ECANCELED; 1280e76ac2bfSKalle Valo ep->ep_cb.rx(ep->target, packet); 1281e76ac2bfSKalle Valo } else { 1282e76ac2bfSKalle Valo htc_rxpkt_reset(packet); 1283e76ac2bfSKalle Valo htc_add_rxbuf((void *)(target), packet); 1284e76ac2bfSKalle Valo } 1285e76ac2bfSKalle Valo } 1286e76ac2bfSKalle Valo 1287e76ac2bfSKalle Valo static void reclaim_rx_ctrl_buf(struct htc_target *target, 1288e76ac2bfSKalle Valo struct htc_packet *packet) 1289e76ac2bfSKalle Valo { 1290e76ac2bfSKalle Valo spin_lock_bh(&target->htc_lock); 1291e76ac2bfSKalle Valo list_add_tail(&packet->list, &target->free_ctrl_rxbuf); 1292e76ac2bfSKalle Valo spin_unlock_bh(&target->htc_lock); 1293e76ac2bfSKalle Valo } 1294e76ac2bfSKalle Valo 1295e76ac2bfSKalle Valo static int ath6kl_htc_rx_packet(struct htc_target *target, 1296e76ac2bfSKalle Valo struct htc_packet *packet, 1297e76ac2bfSKalle Valo u32 rx_len) 1298e76ac2bfSKalle Valo { 1299e76ac2bfSKalle Valo struct ath6kl_device *dev = target->dev; 1300e76ac2bfSKalle Valo u32 padded_len; 1301e76ac2bfSKalle Valo int status; 1302e76ac2bfSKalle Valo 1303e76ac2bfSKalle Valo padded_len = CALC_TXRX_PADDED_LEN(target, rx_len); 1304e76ac2bfSKalle Valo 1305e76ac2bfSKalle Valo if (padded_len > packet->buf_len) { 1306e76ac2bfSKalle Valo ath6kl_err("not enough receive space for packet - padlen %d recvlen %d bufferlen %d\n", 1307e76ac2bfSKalle Valo padded_len, rx_len, packet->buf_len); 1308e76ac2bfSKalle Valo return -ENOMEM; 1309e76ac2bfSKalle Valo } 1310e76ac2bfSKalle Valo 1311e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1312e76ac2bfSKalle Valo "htc rx 0x%p hdr x%x len %d mbox 0x%x\n", 1313e76ac2bfSKalle Valo packet, packet->info.rx.exp_hdr, 1314e76ac2bfSKalle Valo padded_len, dev->ar->mbox_info.htc_addr); 1315e76ac2bfSKalle Valo 1316e76ac2bfSKalle Valo status = hif_read_write_sync(dev->ar, 1317e76ac2bfSKalle Valo dev->ar->mbox_info.htc_addr, 1318e76ac2bfSKalle Valo packet->buf, padded_len, 1319e76ac2bfSKalle Valo HIF_RD_SYNC_BLOCK_FIX); 1320e76ac2bfSKalle Valo 1321e76ac2bfSKalle Valo packet->status = status; 1322e76ac2bfSKalle Valo 1323e76ac2bfSKalle Valo return status; 1324e76ac2bfSKalle Valo } 1325e76ac2bfSKalle Valo 1326e76ac2bfSKalle Valo /* 1327e76ac2bfSKalle Valo * optimization for recv packets, we can indicate a 1328e76ac2bfSKalle Valo * "hint" that there are more single-packets to fetch 1329e76ac2bfSKalle Valo * on this endpoint. 1330e76ac2bfSKalle Valo */ 1331e76ac2bfSKalle Valo static void ath6kl_htc_rx_set_indicate(u32 lk_ahd, 1332e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 1333e76ac2bfSKalle Valo struct htc_packet *packet) 1334e76ac2bfSKalle Valo { 1335e76ac2bfSKalle Valo struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)&lk_ahd; 1336e76ac2bfSKalle Valo 1337e76ac2bfSKalle Valo if (htc_hdr->eid == packet->endpoint) { 1338e76ac2bfSKalle Valo if (!list_empty(&endpoint->rx_bufq)) 1339e76ac2bfSKalle Valo packet->info.rx.indicat_flags |= 1340e76ac2bfSKalle Valo HTC_RX_FLAGS_INDICATE_MORE_PKTS; 1341e76ac2bfSKalle Valo } 1342e76ac2bfSKalle Valo } 1343e76ac2bfSKalle Valo 1344e76ac2bfSKalle Valo static void ath6kl_htc_rx_chk_water_mark(struct htc_endpoint *endpoint) 1345e76ac2bfSKalle Valo { 1346e76ac2bfSKalle Valo struct htc_ep_callbacks ep_cb = endpoint->ep_cb; 1347e76ac2bfSKalle Valo 1348e76ac2bfSKalle Valo if (ep_cb.rx_refill_thresh > 0) { 1349e76ac2bfSKalle Valo spin_lock_bh(&endpoint->target->rx_lock); 1350e76ac2bfSKalle Valo if (get_queue_depth(&endpoint->rx_bufq) 1351e76ac2bfSKalle Valo < ep_cb.rx_refill_thresh) { 1352e76ac2bfSKalle Valo spin_unlock_bh(&endpoint->target->rx_lock); 1353e76ac2bfSKalle Valo ep_cb.rx_refill(endpoint->target, endpoint->eid); 1354e76ac2bfSKalle Valo return; 1355e76ac2bfSKalle Valo } 1356e76ac2bfSKalle Valo spin_unlock_bh(&endpoint->target->rx_lock); 1357e76ac2bfSKalle Valo } 1358e76ac2bfSKalle Valo } 1359e76ac2bfSKalle Valo 1360e76ac2bfSKalle Valo /* This function is called with rx_lock held */ 1361e76ac2bfSKalle Valo static int ath6kl_htc_rx_setup(struct htc_target *target, 1362e76ac2bfSKalle Valo struct htc_endpoint *ep, 1363e76ac2bfSKalle Valo u32 *lk_ahds, struct list_head *queue, int n_msg) 1364e76ac2bfSKalle Valo { 1365e76ac2bfSKalle Valo struct htc_packet *packet; 1366e76ac2bfSKalle Valo /* FIXME: type of lk_ahds can't be right */ 1367e76ac2bfSKalle Valo struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)lk_ahds; 1368e76ac2bfSKalle Valo struct htc_ep_callbacks ep_cb; 1369e76ac2bfSKalle Valo int status = 0, j, full_len; 1370e76ac2bfSKalle Valo bool no_recycle; 1371e76ac2bfSKalle Valo 1372e76ac2bfSKalle Valo full_len = CALC_TXRX_PADDED_LEN(target, 1373e76ac2bfSKalle Valo le16_to_cpu(htc_hdr->payld_len) + 1374e76ac2bfSKalle Valo sizeof(*htc_hdr)); 1375e76ac2bfSKalle Valo 1376e76ac2bfSKalle Valo if (!htc_valid_rx_frame_len(target, ep->eid, full_len)) { 1377e76ac2bfSKalle Valo ath6kl_warn("Rx buffer requested with invalid length htc_hdr:eid %d, flags 0x%x, len %d\n", 1378e76ac2bfSKalle Valo htc_hdr->eid, htc_hdr->flags, 1379e76ac2bfSKalle Valo le16_to_cpu(htc_hdr->payld_len)); 1380e76ac2bfSKalle Valo return -EINVAL; 1381e76ac2bfSKalle Valo } 1382e76ac2bfSKalle Valo 1383e76ac2bfSKalle Valo ep_cb = ep->ep_cb; 1384e76ac2bfSKalle Valo for (j = 0; j < n_msg; j++) { 1385e76ac2bfSKalle Valo 1386e76ac2bfSKalle Valo /* 1387e76ac2bfSKalle Valo * Reset flag, any packets allocated using the 1388e76ac2bfSKalle Valo * rx_alloc() API cannot be recycled on 1389e76ac2bfSKalle Valo * cleanup,they must be explicitly returned. 1390e76ac2bfSKalle Valo */ 1391e76ac2bfSKalle Valo no_recycle = false; 1392e76ac2bfSKalle Valo 1393e76ac2bfSKalle Valo if (ep_cb.rx_allocthresh && 1394e76ac2bfSKalle Valo (full_len > ep_cb.rx_alloc_thresh)) { 1395e76ac2bfSKalle Valo ep->ep_st.rx_alloc_thresh_hit += 1; 1396e76ac2bfSKalle Valo ep->ep_st.rxalloc_thresh_byte += 1397e76ac2bfSKalle Valo le16_to_cpu(htc_hdr->payld_len); 1398e76ac2bfSKalle Valo 1399e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 1400e76ac2bfSKalle Valo no_recycle = true; 1401e76ac2bfSKalle Valo 1402e76ac2bfSKalle Valo packet = ep_cb.rx_allocthresh(ep->target, ep->eid, 1403e76ac2bfSKalle Valo full_len); 1404e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 1405e76ac2bfSKalle Valo } else { 1406e76ac2bfSKalle Valo /* refill handler is being used */ 1407e76ac2bfSKalle Valo if (list_empty(&ep->rx_bufq)) { 1408e76ac2bfSKalle Valo if (ep_cb.rx_refill) { 1409e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 1410e76ac2bfSKalle Valo ep_cb.rx_refill(ep->target, ep->eid); 1411e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 1412e76ac2bfSKalle Valo } 1413e76ac2bfSKalle Valo } 1414e76ac2bfSKalle Valo 1415e76ac2bfSKalle Valo if (list_empty(&ep->rx_bufq)) 1416e76ac2bfSKalle Valo packet = NULL; 1417e76ac2bfSKalle Valo else { 1418e76ac2bfSKalle Valo packet = list_first_entry(&ep->rx_bufq, 1419e76ac2bfSKalle Valo struct htc_packet, list); 1420e76ac2bfSKalle Valo list_del(&packet->list); 1421e76ac2bfSKalle Valo } 1422e76ac2bfSKalle Valo } 1423e76ac2bfSKalle Valo 1424e76ac2bfSKalle Valo if (!packet) { 1425e76ac2bfSKalle Valo target->rx_st_flags |= HTC_RECV_WAIT_BUFFERS; 1426e76ac2bfSKalle Valo target->ep_waiting = ep->eid; 1427e76ac2bfSKalle Valo return -ENOSPC; 1428e76ac2bfSKalle Valo } 1429e76ac2bfSKalle Valo 1430e76ac2bfSKalle Valo /* clear flags */ 1431e76ac2bfSKalle Valo packet->info.rx.rx_flags = 0; 1432e76ac2bfSKalle Valo packet->info.rx.indicat_flags = 0; 1433e76ac2bfSKalle Valo packet->status = 0; 1434e76ac2bfSKalle Valo 1435e76ac2bfSKalle Valo if (no_recycle) 1436e76ac2bfSKalle Valo /* 1437e76ac2bfSKalle Valo * flag that these packets cannot be 1438e76ac2bfSKalle Valo * recycled, they have to be returned to 1439e76ac2bfSKalle Valo * the user 1440e76ac2bfSKalle Valo */ 1441e76ac2bfSKalle Valo packet->info.rx.rx_flags |= HTC_RX_PKT_NO_RECYCLE; 1442e76ac2bfSKalle Valo 1443e76ac2bfSKalle Valo /* Caller needs to free this upon any failure */ 1444e76ac2bfSKalle Valo list_add_tail(&packet->list, queue); 1445e76ac2bfSKalle Valo 1446e76ac2bfSKalle Valo if (target->htc_flags & HTC_OP_STATE_STOPPING) { 1447e76ac2bfSKalle Valo status = -ECANCELED; 1448e76ac2bfSKalle Valo break; 1449e76ac2bfSKalle Valo } 1450e76ac2bfSKalle Valo 1451e76ac2bfSKalle Valo if (j) { 1452e76ac2bfSKalle Valo packet->info.rx.rx_flags |= HTC_RX_PKT_REFRESH_HDR; 1453e76ac2bfSKalle Valo packet->info.rx.exp_hdr = 0xFFFFFFFF; 1454e76ac2bfSKalle Valo } else 1455e76ac2bfSKalle Valo /* set expected look ahead */ 1456e76ac2bfSKalle Valo packet->info.rx.exp_hdr = *lk_ahds; 1457e76ac2bfSKalle Valo 1458e76ac2bfSKalle Valo packet->act_len = le16_to_cpu(htc_hdr->payld_len) + 1459e76ac2bfSKalle Valo HTC_HDR_LENGTH; 1460e76ac2bfSKalle Valo } 1461e76ac2bfSKalle Valo 1462e76ac2bfSKalle Valo return status; 1463e76ac2bfSKalle Valo } 1464e76ac2bfSKalle Valo 1465e76ac2bfSKalle Valo static int ath6kl_htc_rx_alloc(struct htc_target *target, 1466e76ac2bfSKalle Valo u32 lk_ahds[], int msg, 1467e76ac2bfSKalle Valo struct htc_endpoint *endpoint, 1468e76ac2bfSKalle Valo struct list_head *queue) 1469e76ac2bfSKalle Valo { 1470e76ac2bfSKalle Valo int status = 0; 1471e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 1472e76ac2bfSKalle Valo struct htc_frame_hdr *htc_hdr; 1473e76ac2bfSKalle Valo int i, n_msg; 1474e76ac2bfSKalle Valo 1475e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 1476e76ac2bfSKalle Valo 1477e76ac2bfSKalle Valo for (i = 0; i < msg; i++) { 1478e76ac2bfSKalle Valo 1479e76ac2bfSKalle Valo htc_hdr = (struct htc_frame_hdr *)&lk_ahds[i]; 1480e76ac2bfSKalle Valo 1481e76ac2bfSKalle Valo if (htc_hdr->eid >= ENDPOINT_MAX) { 1482e76ac2bfSKalle Valo ath6kl_err("invalid ep in look-ahead: %d\n", 1483e76ac2bfSKalle Valo htc_hdr->eid); 1484e76ac2bfSKalle Valo status = -ENOMEM; 1485e76ac2bfSKalle Valo break; 1486e76ac2bfSKalle Valo } 1487e76ac2bfSKalle Valo 1488e76ac2bfSKalle Valo if (htc_hdr->eid != endpoint->eid) { 1489e76ac2bfSKalle Valo ath6kl_err("invalid ep in look-ahead: %d should be : %d (index:%d)\n", 1490e76ac2bfSKalle Valo htc_hdr->eid, endpoint->eid, i); 1491e76ac2bfSKalle Valo status = -ENOMEM; 1492e76ac2bfSKalle Valo break; 1493e76ac2bfSKalle Valo } 1494e76ac2bfSKalle Valo 1495e76ac2bfSKalle Valo if (le16_to_cpu(htc_hdr->payld_len) > HTC_MAX_PAYLOAD_LENGTH) { 1496e76ac2bfSKalle Valo ath6kl_err("payload len %d exceeds max htc : %d !\n", 1497e76ac2bfSKalle Valo htc_hdr->payld_len, 1498e76ac2bfSKalle Valo (u32) HTC_MAX_PAYLOAD_LENGTH); 1499e76ac2bfSKalle Valo status = -ENOMEM; 1500e76ac2bfSKalle Valo break; 1501e76ac2bfSKalle Valo } 1502e76ac2bfSKalle Valo 1503e76ac2bfSKalle Valo if (endpoint->svc_id == 0) { 1504e76ac2bfSKalle Valo ath6kl_err("ep %d is not connected !\n", htc_hdr->eid); 1505e76ac2bfSKalle Valo status = -ENOMEM; 1506e76ac2bfSKalle Valo break; 1507e76ac2bfSKalle Valo } 1508e76ac2bfSKalle Valo 1509e76ac2bfSKalle Valo if (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) { 1510e76ac2bfSKalle Valo /* 1511e76ac2bfSKalle Valo * HTC header indicates that every packet to follow 1512e76ac2bfSKalle Valo * has the same padded length so that it can be 1513e76ac2bfSKalle Valo * optimally fetched as a full bundle. 1514e76ac2bfSKalle Valo */ 1515e76ac2bfSKalle Valo n_msg = (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) >> 1516e76ac2bfSKalle Valo HTC_FLG_RX_BNDL_CNT_S; 1517e76ac2bfSKalle Valo 1518e76ac2bfSKalle Valo /* the count doesn't include the starter frame */ 1519e76ac2bfSKalle Valo n_msg++; 1520e76ac2bfSKalle Valo if (n_msg > target->msg_per_bndl_max) { 1521e76ac2bfSKalle Valo status = -ENOMEM; 1522e76ac2bfSKalle Valo break; 1523e76ac2bfSKalle Valo } 1524e76ac2bfSKalle Valo 1525e76ac2bfSKalle Valo endpoint->ep_st.rx_bundle_from_hdr += 1; 1526e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1527e76ac2bfSKalle Valo "htc rx bundle pkts %d\n", 1528e76ac2bfSKalle Valo n_msg); 1529e76ac2bfSKalle Valo } else 1530e76ac2bfSKalle Valo /* HTC header only indicates 1 message to fetch */ 1531e76ac2bfSKalle Valo n_msg = 1; 1532e76ac2bfSKalle Valo 1533e76ac2bfSKalle Valo /* Setup packet buffers for each message */ 1534e76ac2bfSKalle Valo status = ath6kl_htc_rx_setup(target, endpoint, &lk_ahds[i], 1535e76ac2bfSKalle Valo queue, n_msg); 1536e76ac2bfSKalle Valo 1537e76ac2bfSKalle Valo /* 1538e76ac2bfSKalle Valo * This is due to unavailabilty of buffers to rx entire data. 1539e76ac2bfSKalle Valo * Return no error so that free buffers from queue can be used 1540e76ac2bfSKalle Valo * to receive partial data. 1541e76ac2bfSKalle Valo */ 1542e76ac2bfSKalle Valo if (status == -ENOSPC) { 1543e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 1544e76ac2bfSKalle Valo return 0; 1545e76ac2bfSKalle Valo } 1546e76ac2bfSKalle Valo 1547e76ac2bfSKalle Valo if (status) 1548e76ac2bfSKalle Valo break; 1549e76ac2bfSKalle Valo } 1550e76ac2bfSKalle Valo 1551e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 1552e76ac2bfSKalle Valo 1553e76ac2bfSKalle Valo if (status) { 1554e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, queue, list) { 1555e76ac2bfSKalle Valo list_del(&packet->list); 1556e76ac2bfSKalle Valo htc_reclaim_rxbuf(target, packet, 1557e76ac2bfSKalle Valo &target->endpoint[packet->endpoint]); 1558e76ac2bfSKalle Valo } 1559e76ac2bfSKalle Valo } 1560e76ac2bfSKalle Valo 1561e76ac2bfSKalle Valo return status; 1562e76ac2bfSKalle Valo } 1563e76ac2bfSKalle Valo 1564e76ac2bfSKalle Valo static void htc_ctrl_rx(struct htc_target *context, struct htc_packet *packets) 1565e76ac2bfSKalle Valo { 1566e76ac2bfSKalle Valo if (packets->endpoint != ENDPOINT_0) { 1567e76ac2bfSKalle Valo WARN_ON(1); 1568e76ac2bfSKalle Valo return; 1569e76ac2bfSKalle Valo } 1570e76ac2bfSKalle Valo 1571e76ac2bfSKalle Valo if (packets->status == -ECANCELED) { 1572e76ac2bfSKalle Valo reclaim_rx_ctrl_buf(context, packets); 1573e76ac2bfSKalle Valo return; 1574e76ac2bfSKalle Valo } 1575e76ac2bfSKalle Valo 1576e76ac2bfSKalle Valo if (packets->act_len > 0) { 1577e76ac2bfSKalle Valo ath6kl_err("htc_ctrl_rx, got message with len:%zu\n", 1578e76ac2bfSKalle Valo packets->act_len + HTC_HDR_LENGTH); 1579e76ac2bfSKalle Valo 1580e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, 1581e76ac2bfSKalle Valo "htc rx unexpected endpoint 0 message", "", 1582e76ac2bfSKalle Valo packets->buf - HTC_HDR_LENGTH, 1583e76ac2bfSKalle Valo packets->act_len + HTC_HDR_LENGTH); 1584e76ac2bfSKalle Valo } 1585e76ac2bfSKalle Valo 1586e76ac2bfSKalle Valo htc_reclaim_rxbuf(context, packets, &context->endpoint[0]); 1587e76ac2bfSKalle Valo } 1588e76ac2bfSKalle Valo 1589e76ac2bfSKalle Valo static void htc_proc_cred_rpt(struct htc_target *target, 1590e76ac2bfSKalle Valo struct htc_credit_report *rpt, 1591e76ac2bfSKalle Valo int n_entries, 1592e76ac2bfSKalle Valo enum htc_endpoint_id from_ep) 1593e76ac2bfSKalle Valo { 1594e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 1595e76ac2bfSKalle Valo int tot_credits = 0, i; 1596e76ac2bfSKalle Valo bool dist = false; 1597e76ac2bfSKalle Valo 1598e76ac2bfSKalle Valo spin_lock_bh(&target->tx_lock); 1599e76ac2bfSKalle Valo 1600e76ac2bfSKalle Valo for (i = 0; i < n_entries; i++, rpt++) { 1601e76ac2bfSKalle Valo if (rpt->eid >= ENDPOINT_MAX) { 1602e76ac2bfSKalle Valo WARN_ON(1); 1603e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1604e76ac2bfSKalle Valo return; 1605e76ac2bfSKalle Valo } 1606e76ac2bfSKalle Valo 1607e76ac2bfSKalle Valo endpoint = &target->endpoint[rpt->eid]; 1608e76ac2bfSKalle Valo 1609e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_CREDIT, 1610e76ac2bfSKalle Valo "credit report ep %d credits %d\n", 1611e76ac2bfSKalle Valo rpt->eid, rpt->credits); 1612e76ac2bfSKalle Valo 1613e76ac2bfSKalle Valo endpoint->ep_st.tx_cred_rpt += 1; 1614e76ac2bfSKalle Valo endpoint->ep_st.cred_retnd += rpt->credits; 1615e76ac2bfSKalle Valo 1616e76ac2bfSKalle Valo if (from_ep == rpt->eid) { 1617e76ac2bfSKalle Valo /* 1618e76ac2bfSKalle Valo * This credit report arrived on the same endpoint 1619e76ac2bfSKalle Valo * indicating it arrived in an RX packet. 1620e76ac2bfSKalle Valo */ 1621e76ac2bfSKalle Valo endpoint->ep_st.cred_from_rx += rpt->credits; 1622e76ac2bfSKalle Valo endpoint->ep_st.cred_rpt_from_rx += 1; 1623e76ac2bfSKalle Valo } else if (from_ep == ENDPOINT_0) { 1624e76ac2bfSKalle Valo /* credit arrived on endpoint 0 as a NULL message */ 1625e76ac2bfSKalle Valo endpoint->ep_st.cred_from_ep0 += rpt->credits; 1626e76ac2bfSKalle Valo endpoint->ep_st.cred_rpt_ep0 += 1; 1627e76ac2bfSKalle Valo } else { 1628e76ac2bfSKalle Valo endpoint->ep_st.cred_from_other += rpt->credits; 1629e76ac2bfSKalle Valo endpoint->ep_st.cred_rpt_from_other += 1; 1630e76ac2bfSKalle Valo } 1631e76ac2bfSKalle Valo 1632e76ac2bfSKalle Valo if (rpt->eid == ENDPOINT_0) 1633e76ac2bfSKalle Valo /* always give endpoint 0 credits back */ 1634e76ac2bfSKalle Valo endpoint->cred_dist.credits += rpt->credits; 1635e76ac2bfSKalle Valo else { 1636e76ac2bfSKalle Valo endpoint->cred_dist.cred_to_dist += rpt->credits; 1637e76ac2bfSKalle Valo dist = true; 1638e76ac2bfSKalle Valo } 1639e76ac2bfSKalle Valo 1640e76ac2bfSKalle Valo /* 1641e76ac2bfSKalle Valo * Refresh tx depth for distribution function that will 1642e76ac2bfSKalle Valo * recover these credits NOTE: this is only valid when 1643e76ac2bfSKalle Valo * there are credits to recover! 1644e76ac2bfSKalle Valo */ 1645e76ac2bfSKalle Valo endpoint->cred_dist.txq_depth = 1646e76ac2bfSKalle Valo get_queue_depth(&endpoint->txq); 1647e76ac2bfSKalle Valo 1648e76ac2bfSKalle Valo tot_credits += rpt->credits; 1649e76ac2bfSKalle Valo } 1650e76ac2bfSKalle Valo 1651e76ac2bfSKalle Valo if (dist) { 1652e76ac2bfSKalle Valo /* 1653e76ac2bfSKalle Valo * This was a credit return based on a completed send 1654e76ac2bfSKalle Valo * operations note, this is done with the lock held 1655e76ac2bfSKalle Valo */ 1656e76ac2bfSKalle Valo ath6kl_credit_distribute(target->credit_info, 1657e76ac2bfSKalle Valo &target->cred_dist_list, 1658e76ac2bfSKalle Valo HTC_CREDIT_DIST_SEND_COMPLETE); 1659e76ac2bfSKalle Valo } 1660e76ac2bfSKalle Valo 1661e76ac2bfSKalle Valo spin_unlock_bh(&target->tx_lock); 1662e76ac2bfSKalle Valo 1663e76ac2bfSKalle Valo if (tot_credits) 1664e76ac2bfSKalle Valo htc_chk_ep_txq(target); 1665e76ac2bfSKalle Valo } 1666e76ac2bfSKalle Valo 1667e76ac2bfSKalle Valo static int htc_parse_trailer(struct htc_target *target, 1668e76ac2bfSKalle Valo struct htc_record_hdr *record, 1669e76ac2bfSKalle Valo u8 *record_buf, u32 *next_lk_ahds, 1670e76ac2bfSKalle Valo enum htc_endpoint_id endpoint, 1671e76ac2bfSKalle Valo int *n_lk_ahds) 1672e76ac2bfSKalle Valo { 1673e76ac2bfSKalle Valo struct htc_bundle_lkahd_rpt *bundle_lkahd_rpt; 1674e76ac2bfSKalle Valo struct htc_lookahead_report *lk_ahd; 1675e76ac2bfSKalle Valo int len; 1676e76ac2bfSKalle Valo 1677e76ac2bfSKalle Valo switch (record->rec_id) { 1678e76ac2bfSKalle Valo case HTC_RECORD_CREDITS: 1679e76ac2bfSKalle Valo len = record->len / sizeof(struct htc_credit_report); 1680e76ac2bfSKalle Valo if (!len) { 1681e76ac2bfSKalle Valo WARN_ON(1); 1682e76ac2bfSKalle Valo return -EINVAL; 1683e76ac2bfSKalle Valo } 1684e76ac2bfSKalle Valo 1685e76ac2bfSKalle Valo htc_proc_cred_rpt(target, 1686e76ac2bfSKalle Valo (struct htc_credit_report *) record_buf, 1687e76ac2bfSKalle Valo len, endpoint); 1688e76ac2bfSKalle Valo break; 1689e76ac2bfSKalle Valo case HTC_RECORD_LOOKAHEAD: 1690e76ac2bfSKalle Valo len = record->len / sizeof(*lk_ahd); 1691e76ac2bfSKalle Valo if (!len) { 1692e76ac2bfSKalle Valo WARN_ON(1); 1693e76ac2bfSKalle Valo return -EINVAL; 1694e76ac2bfSKalle Valo } 1695e76ac2bfSKalle Valo 1696e76ac2bfSKalle Valo lk_ahd = (struct htc_lookahead_report *) record_buf; 1697e76ac2bfSKalle Valo if ((lk_ahd->pre_valid == ((~lk_ahd->post_valid) & 0xFF)) && 1698e76ac2bfSKalle Valo next_lk_ahds) { 1699e76ac2bfSKalle Valo 1700e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1701e76ac2bfSKalle Valo "htc rx lk_ahd found pre_valid 0x%x post_valid 0x%x\n", 1702e76ac2bfSKalle Valo lk_ahd->pre_valid, lk_ahd->post_valid); 1703e76ac2bfSKalle Valo 1704e76ac2bfSKalle Valo /* look ahead bytes are valid, copy them over */ 1705e76ac2bfSKalle Valo memcpy((u8 *)&next_lk_ahds[0], lk_ahd->lk_ahd, 4); 1706e76ac2bfSKalle Valo 1707e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, 1708e76ac2bfSKalle Valo "htc rx next look ahead", 1709e76ac2bfSKalle Valo "", next_lk_ahds, 4); 1710e76ac2bfSKalle Valo 1711e76ac2bfSKalle Valo *n_lk_ahds = 1; 1712e76ac2bfSKalle Valo } 1713e76ac2bfSKalle Valo break; 1714e76ac2bfSKalle Valo case HTC_RECORD_LOOKAHEAD_BUNDLE: 1715e76ac2bfSKalle Valo len = record->len / sizeof(*bundle_lkahd_rpt); 1716e76ac2bfSKalle Valo if (!len || (len > HTC_HOST_MAX_MSG_PER_BUNDLE)) { 1717e76ac2bfSKalle Valo WARN_ON(1); 1718e76ac2bfSKalle Valo return -EINVAL; 1719e76ac2bfSKalle Valo } 1720e76ac2bfSKalle Valo 1721e76ac2bfSKalle Valo if (next_lk_ahds) { 1722e76ac2bfSKalle Valo int i; 1723e76ac2bfSKalle Valo 1724e76ac2bfSKalle Valo bundle_lkahd_rpt = 1725e76ac2bfSKalle Valo (struct htc_bundle_lkahd_rpt *) record_buf; 1726e76ac2bfSKalle Valo 1727e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bundle lk_ahd", 1728e76ac2bfSKalle Valo "", record_buf, record->len); 1729e76ac2bfSKalle Valo 1730e76ac2bfSKalle Valo for (i = 0; i < len; i++) { 1731e76ac2bfSKalle Valo memcpy((u8 *)&next_lk_ahds[i], 1732e76ac2bfSKalle Valo bundle_lkahd_rpt->lk_ahd, 4); 1733e76ac2bfSKalle Valo bundle_lkahd_rpt++; 1734e76ac2bfSKalle Valo } 1735e76ac2bfSKalle Valo 1736e76ac2bfSKalle Valo *n_lk_ahds = i; 1737e76ac2bfSKalle Valo } 1738e76ac2bfSKalle Valo break; 1739e76ac2bfSKalle Valo default: 1740e76ac2bfSKalle Valo ath6kl_err("unhandled record: id:%d len:%d\n", 1741e76ac2bfSKalle Valo record->rec_id, record->len); 1742e76ac2bfSKalle Valo break; 1743e76ac2bfSKalle Valo } 1744e76ac2bfSKalle Valo 1745e76ac2bfSKalle Valo return 0; 1746e76ac2bfSKalle Valo 1747e76ac2bfSKalle Valo } 1748e76ac2bfSKalle Valo 1749e76ac2bfSKalle Valo static int htc_proc_trailer(struct htc_target *target, 1750e76ac2bfSKalle Valo u8 *buf, int len, u32 *next_lk_ahds, 1751e76ac2bfSKalle Valo int *n_lk_ahds, enum htc_endpoint_id endpoint) 1752e76ac2bfSKalle Valo { 1753e76ac2bfSKalle Valo struct htc_record_hdr *record; 1754e76ac2bfSKalle Valo int orig_len; 1755e76ac2bfSKalle Valo int status; 1756e76ac2bfSKalle Valo u8 *record_buf; 1757e76ac2bfSKalle Valo u8 *orig_buf; 1758e76ac2bfSKalle Valo 1759e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, "htc rx trailer len %d\n", len); 1760e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, NULL, "", buf, len); 1761e76ac2bfSKalle Valo 1762e76ac2bfSKalle Valo orig_buf = buf; 1763e76ac2bfSKalle Valo orig_len = len; 1764e76ac2bfSKalle Valo status = 0; 1765e76ac2bfSKalle Valo 1766e76ac2bfSKalle Valo while (len > 0) { 1767e76ac2bfSKalle Valo 1768e76ac2bfSKalle Valo if (len < sizeof(struct htc_record_hdr)) { 1769e76ac2bfSKalle Valo status = -ENOMEM; 1770e76ac2bfSKalle Valo break; 1771e76ac2bfSKalle Valo } 1772e76ac2bfSKalle Valo /* these are byte aligned structs */ 1773e76ac2bfSKalle Valo record = (struct htc_record_hdr *) buf; 1774e76ac2bfSKalle Valo len -= sizeof(struct htc_record_hdr); 1775e76ac2bfSKalle Valo buf += sizeof(struct htc_record_hdr); 1776e76ac2bfSKalle Valo 1777e76ac2bfSKalle Valo if (record->len > len) { 1778e76ac2bfSKalle Valo ath6kl_err("invalid record len: %d (id:%d) buf has: %d bytes left\n", 1779e76ac2bfSKalle Valo record->len, record->rec_id, len); 1780e76ac2bfSKalle Valo status = -ENOMEM; 1781e76ac2bfSKalle Valo break; 1782e76ac2bfSKalle Valo } 1783e76ac2bfSKalle Valo record_buf = buf; 1784e76ac2bfSKalle Valo 1785e76ac2bfSKalle Valo status = htc_parse_trailer(target, record, record_buf, 1786e76ac2bfSKalle Valo next_lk_ahds, endpoint, n_lk_ahds); 1787e76ac2bfSKalle Valo 1788e76ac2bfSKalle Valo if (status) 1789e76ac2bfSKalle Valo break; 1790e76ac2bfSKalle Valo 1791e76ac2bfSKalle Valo /* advance buffer past this record for next time around */ 1792e76ac2bfSKalle Valo buf += record->len; 1793e76ac2bfSKalle Valo len -= record->len; 1794e76ac2bfSKalle Valo } 1795e76ac2bfSKalle Valo 1796e76ac2bfSKalle Valo if (status) 1797e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad trailer", 1798e76ac2bfSKalle Valo "", orig_buf, orig_len); 1799e76ac2bfSKalle Valo 1800e76ac2bfSKalle Valo return status; 1801e76ac2bfSKalle Valo } 1802e76ac2bfSKalle Valo 1803e76ac2bfSKalle Valo static int ath6kl_htc_rx_process_hdr(struct htc_target *target, 1804e76ac2bfSKalle Valo struct htc_packet *packet, 1805e76ac2bfSKalle Valo u32 *next_lkahds, int *n_lkahds) 1806e76ac2bfSKalle Valo { 1807e76ac2bfSKalle Valo int status = 0; 1808e76ac2bfSKalle Valo u16 payload_len; 1809e76ac2bfSKalle Valo u32 lk_ahd; 1810e76ac2bfSKalle Valo struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)packet->buf; 1811e76ac2bfSKalle Valo 1812e76ac2bfSKalle Valo if (n_lkahds != NULL) 1813e76ac2bfSKalle Valo *n_lkahds = 0; 1814e76ac2bfSKalle Valo 1815e76ac2bfSKalle Valo /* 1816e76ac2bfSKalle Valo * NOTE: we cannot assume the alignment of buf, so we use the safe 1817e76ac2bfSKalle Valo * macros to retrieve 16 bit fields. 1818e76ac2bfSKalle Valo */ 1819e76ac2bfSKalle Valo payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len)); 1820e76ac2bfSKalle Valo 1821e76ac2bfSKalle Valo memcpy((u8 *)&lk_ahd, packet->buf, sizeof(lk_ahd)); 1822e76ac2bfSKalle Valo 1823e76ac2bfSKalle Valo if (packet->info.rx.rx_flags & HTC_RX_PKT_REFRESH_HDR) { 1824e76ac2bfSKalle Valo /* 1825e76ac2bfSKalle Valo * Refresh the expected header and the actual length as it 1826e76ac2bfSKalle Valo * was unknown when this packet was grabbed as part of the 1827e76ac2bfSKalle Valo * bundle. 1828e76ac2bfSKalle Valo */ 1829e76ac2bfSKalle Valo packet->info.rx.exp_hdr = lk_ahd; 1830e76ac2bfSKalle Valo packet->act_len = payload_len + HTC_HDR_LENGTH; 1831e76ac2bfSKalle Valo 1832e76ac2bfSKalle Valo /* validate the actual header that was refreshed */ 1833e76ac2bfSKalle Valo if (packet->act_len > packet->buf_len) { 1834e76ac2bfSKalle Valo ath6kl_err("refreshed hdr payload len (%d) in bundled recv is invalid (hdr: 0x%X)\n", 1835e76ac2bfSKalle Valo payload_len, lk_ahd); 1836e76ac2bfSKalle Valo /* 1837e76ac2bfSKalle Valo * Limit this to max buffer just to print out some 1838e76ac2bfSKalle Valo * of the buffer. 1839e76ac2bfSKalle Valo */ 1840e76ac2bfSKalle Valo packet->act_len = min(packet->act_len, packet->buf_len); 1841e76ac2bfSKalle Valo status = -ENOMEM; 1842e76ac2bfSKalle Valo goto fail_rx; 1843e76ac2bfSKalle Valo } 1844e76ac2bfSKalle Valo 1845e76ac2bfSKalle Valo if (packet->endpoint != htc_hdr->eid) { 1846e76ac2bfSKalle Valo ath6kl_err("refreshed hdr ep (%d) does not match expected ep (%d)\n", 1847e76ac2bfSKalle Valo htc_hdr->eid, packet->endpoint); 1848e76ac2bfSKalle Valo status = -ENOMEM; 1849e76ac2bfSKalle Valo goto fail_rx; 1850e76ac2bfSKalle Valo } 1851e76ac2bfSKalle Valo } 1852e76ac2bfSKalle Valo 1853e76ac2bfSKalle Valo if (lk_ahd != packet->info.rx.exp_hdr) { 1854e76ac2bfSKalle Valo ath6kl_err("%s(): lk_ahd mismatch! (pPkt:0x%p flags:0x%X)\n", 1855e76ac2bfSKalle Valo __func__, packet, packet->info.rx.rx_flags); 1856e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx expected lk_ahd", 1857e76ac2bfSKalle Valo "", &packet->info.rx.exp_hdr, 4); 1858e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx current header", 1859e76ac2bfSKalle Valo "", (u8 *)&lk_ahd, sizeof(lk_ahd)); 1860e76ac2bfSKalle Valo status = -ENOMEM; 1861e76ac2bfSKalle Valo goto fail_rx; 1862e76ac2bfSKalle Valo } 1863e76ac2bfSKalle Valo 1864e76ac2bfSKalle Valo if (htc_hdr->flags & HTC_FLG_RX_TRAILER) { 1865e76ac2bfSKalle Valo if (htc_hdr->ctrl[0] < sizeof(struct htc_record_hdr) || 1866e76ac2bfSKalle Valo htc_hdr->ctrl[0] > payload_len) { 1867e76ac2bfSKalle Valo ath6kl_err("%s(): invalid hdr (payload len should be :%d, CB[0] is:%d)\n", 1868e76ac2bfSKalle Valo __func__, payload_len, htc_hdr->ctrl[0]); 1869e76ac2bfSKalle Valo status = -ENOMEM; 1870e76ac2bfSKalle Valo goto fail_rx; 1871e76ac2bfSKalle Valo } 1872e76ac2bfSKalle Valo 1873e76ac2bfSKalle Valo if (packet->info.rx.rx_flags & HTC_RX_PKT_IGNORE_LOOKAHEAD) { 1874e76ac2bfSKalle Valo next_lkahds = NULL; 1875e76ac2bfSKalle Valo n_lkahds = NULL; 1876e76ac2bfSKalle Valo } 1877e76ac2bfSKalle Valo 1878e76ac2bfSKalle Valo status = htc_proc_trailer(target, packet->buf + HTC_HDR_LENGTH 1879e76ac2bfSKalle Valo + payload_len - htc_hdr->ctrl[0], 1880e76ac2bfSKalle Valo htc_hdr->ctrl[0], next_lkahds, 1881e76ac2bfSKalle Valo n_lkahds, packet->endpoint); 1882e76ac2bfSKalle Valo 1883e76ac2bfSKalle Valo if (status) 1884e76ac2bfSKalle Valo goto fail_rx; 1885e76ac2bfSKalle Valo 1886e76ac2bfSKalle Valo packet->act_len -= htc_hdr->ctrl[0]; 1887e76ac2bfSKalle Valo } 1888e76ac2bfSKalle Valo 1889e76ac2bfSKalle Valo packet->buf += HTC_HDR_LENGTH; 1890e76ac2bfSKalle Valo packet->act_len -= HTC_HDR_LENGTH; 1891e76ac2bfSKalle Valo 1892e76ac2bfSKalle Valo fail_rx: 1893e76ac2bfSKalle Valo if (status) 1894e76ac2bfSKalle Valo ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad packet", 1895e76ac2bfSKalle Valo "", packet->buf, packet->act_len); 1896e76ac2bfSKalle Valo 1897e76ac2bfSKalle Valo return status; 1898e76ac2bfSKalle Valo } 1899e76ac2bfSKalle Valo 1900e76ac2bfSKalle Valo static void ath6kl_htc_rx_complete(struct htc_endpoint *endpoint, 1901e76ac2bfSKalle Valo struct htc_packet *packet) 1902e76ac2bfSKalle Valo { 1903e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1904e76ac2bfSKalle Valo "htc rx complete ep %d packet 0x%p\n", 1905e76ac2bfSKalle Valo endpoint->eid, packet); 1906e76ac2bfSKalle Valo endpoint->ep_cb.rx(endpoint->target, packet); 1907e76ac2bfSKalle Valo } 1908e76ac2bfSKalle Valo 1909e76ac2bfSKalle Valo static int ath6kl_htc_rx_bundle(struct htc_target *target, 1910e76ac2bfSKalle Valo struct list_head *rxq, 1911e76ac2bfSKalle Valo struct list_head *sync_compq, 1912e76ac2bfSKalle Valo int *n_pkt_fetched, bool part_bundle) 1913e76ac2bfSKalle Valo { 1914e76ac2bfSKalle Valo struct hif_scatter_req *scat_req; 1915e76ac2bfSKalle Valo struct htc_packet *packet; 1916e76ac2bfSKalle Valo int rem_space = target->max_rx_bndl_sz; 1917e76ac2bfSKalle Valo int n_scat_pkt, status = 0, i, len; 1918e76ac2bfSKalle Valo 1919e76ac2bfSKalle Valo n_scat_pkt = get_queue_depth(rxq); 1920e76ac2bfSKalle Valo n_scat_pkt = min(n_scat_pkt, target->msg_per_bndl_max); 1921e76ac2bfSKalle Valo 1922e76ac2bfSKalle Valo if ((get_queue_depth(rxq) - n_scat_pkt) > 0) { 1923e76ac2bfSKalle Valo /* 1924e76ac2bfSKalle Valo * We were forced to split this bundle receive operation 1925e76ac2bfSKalle Valo * all packets in this partial bundle must have their 1926e76ac2bfSKalle Valo * lookaheads ignored. 1927e76ac2bfSKalle Valo */ 1928e76ac2bfSKalle Valo part_bundle = true; 1929e76ac2bfSKalle Valo 1930e76ac2bfSKalle Valo /* 1931e76ac2bfSKalle Valo * This would only happen if the target ignored our max 1932e76ac2bfSKalle Valo * bundle limit. 1933e76ac2bfSKalle Valo */ 1934e76ac2bfSKalle Valo ath6kl_warn("%s(): partial bundle detected num:%d , %d\n", 1935e76ac2bfSKalle Valo __func__, get_queue_depth(rxq), n_scat_pkt); 1936e76ac2bfSKalle Valo } 1937e76ac2bfSKalle Valo 1938e76ac2bfSKalle Valo len = 0; 1939e76ac2bfSKalle Valo 1940e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 1941e76ac2bfSKalle Valo "htc rx bundle depth %d pkts %d\n", 1942e76ac2bfSKalle Valo get_queue_depth(rxq), n_scat_pkt); 1943e76ac2bfSKalle Valo 1944e76ac2bfSKalle Valo scat_req = hif_scatter_req_get(target->dev->ar); 1945e76ac2bfSKalle Valo 1946e76ac2bfSKalle Valo if (scat_req == NULL) 1947e76ac2bfSKalle Valo goto fail_rx_pkt; 1948e76ac2bfSKalle Valo 1949e76ac2bfSKalle Valo for (i = 0; i < n_scat_pkt; i++) { 1950e76ac2bfSKalle Valo int pad_len; 1951e76ac2bfSKalle Valo 1952e76ac2bfSKalle Valo packet = list_first_entry(rxq, struct htc_packet, list); 1953e76ac2bfSKalle Valo list_del(&packet->list); 1954e76ac2bfSKalle Valo 1955e76ac2bfSKalle Valo pad_len = CALC_TXRX_PADDED_LEN(target, 1956e76ac2bfSKalle Valo packet->act_len); 1957e76ac2bfSKalle Valo 1958e76ac2bfSKalle Valo if ((rem_space - pad_len) < 0) { 1959e76ac2bfSKalle Valo list_add(&packet->list, rxq); 1960e76ac2bfSKalle Valo break; 1961e76ac2bfSKalle Valo } 1962e76ac2bfSKalle Valo 1963e76ac2bfSKalle Valo rem_space -= pad_len; 1964e76ac2bfSKalle Valo 1965e76ac2bfSKalle Valo if (part_bundle || (i < (n_scat_pkt - 1))) 1966e76ac2bfSKalle Valo /* 1967e76ac2bfSKalle Valo * Packet 0..n-1 cannot be checked for look-aheads 1968e76ac2bfSKalle Valo * since we are fetching a bundle the last packet 1969e76ac2bfSKalle Valo * however can have it's lookahead used 1970e76ac2bfSKalle Valo */ 1971e76ac2bfSKalle Valo packet->info.rx.rx_flags |= 1972e76ac2bfSKalle Valo HTC_RX_PKT_IGNORE_LOOKAHEAD; 1973e76ac2bfSKalle Valo 1974e76ac2bfSKalle Valo /* NOTE: 1 HTC packet per scatter entry */ 1975e76ac2bfSKalle Valo scat_req->scat_list[i].buf = packet->buf; 1976e76ac2bfSKalle Valo scat_req->scat_list[i].len = pad_len; 1977e76ac2bfSKalle Valo 1978e76ac2bfSKalle Valo packet->info.rx.rx_flags |= HTC_RX_PKT_PART_OF_BUNDLE; 1979e76ac2bfSKalle Valo 1980e76ac2bfSKalle Valo list_add_tail(&packet->list, sync_compq); 1981e76ac2bfSKalle Valo 1982e76ac2bfSKalle Valo WARN_ON(!scat_req->scat_list[i].len); 1983e76ac2bfSKalle Valo len += scat_req->scat_list[i].len; 1984e76ac2bfSKalle Valo } 1985e76ac2bfSKalle Valo 1986e76ac2bfSKalle Valo scat_req->len = len; 1987e76ac2bfSKalle Valo scat_req->scat_entries = i; 1988e76ac2bfSKalle Valo 1989e76ac2bfSKalle Valo status = ath6kl_hif_submit_scat_req(target->dev, scat_req, true); 1990e76ac2bfSKalle Valo 1991e76ac2bfSKalle Valo if (!status) 1992e76ac2bfSKalle Valo *n_pkt_fetched = i; 1993e76ac2bfSKalle Valo 1994e76ac2bfSKalle Valo /* free scatter request */ 1995e76ac2bfSKalle Valo hif_scatter_req_add(target->dev->ar, scat_req); 1996e76ac2bfSKalle Valo 1997e76ac2bfSKalle Valo fail_rx_pkt: 1998e76ac2bfSKalle Valo 1999e76ac2bfSKalle Valo return status; 2000e76ac2bfSKalle Valo } 2001e76ac2bfSKalle Valo 2002e76ac2bfSKalle Valo static int ath6kl_htc_rx_process_packets(struct htc_target *target, 2003e76ac2bfSKalle Valo struct list_head *comp_pktq, 2004e76ac2bfSKalle Valo u32 lk_ahds[], 2005e76ac2bfSKalle Valo int *n_lk_ahd) 2006e76ac2bfSKalle Valo { 2007e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 2008e76ac2bfSKalle Valo struct htc_endpoint *ep; 2009e76ac2bfSKalle Valo int status = 0; 2010e76ac2bfSKalle Valo 2011e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) { 2012e76ac2bfSKalle Valo ep = &target->endpoint[packet->endpoint]; 2013e76ac2bfSKalle Valo 2014e76ac2bfSKalle Valo /* process header for each of the recv packet */ 2015e76ac2bfSKalle Valo status = ath6kl_htc_rx_process_hdr(target, packet, lk_ahds, 2016e76ac2bfSKalle Valo n_lk_ahd); 2017e76ac2bfSKalle Valo if (status) 2018e76ac2bfSKalle Valo return status; 2019e76ac2bfSKalle Valo 2020e76ac2bfSKalle Valo list_del(&packet->list); 2021e76ac2bfSKalle Valo 2022e76ac2bfSKalle Valo if (list_empty(comp_pktq)) { 2023e76ac2bfSKalle Valo /* 2024e76ac2bfSKalle Valo * Last packet's more packet flag is set 2025e76ac2bfSKalle Valo * based on the lookahead. 2026e76ac2bfSKalle Valo */ 2027e76ac2bfSKalle Valo if (*n_lk_ahd > 0) 2028e76ac2bfSKalle Valo ath6kl_htc_rx_set_indicate(lk_ahds[0], 2029e76ac2bfSKalle Valo ep, packet); 2030e76ac2bfSKalle Valo } else 2031e76ac2bfSKalle Valo /* 2032e76ac2bfSKalle Valo * Packets in a bundle automatically have 2033e76ac2bfSKalle Valo * this flag set. 2034e76ac2bfSKalle Valo */ 2035e76ac2bfSKalle Valo packet->info.rx.indicat_flags |= 2036e76ac2bfSKalle Valo HTC_RX_FLAGS_INDICATE_MORE_PKTS; 2037e76ac2bfSKalle Valo 2038e76ac2bfSKalle Valo ath6kl_htc_rx_update_stats(ep, *n_lk_ahd); 2039e76ac2bfSKalle Valo 2040e76ac2bfSKalle Valo if (packet->info.rx.rx_flags & HTC_RX_PKT_PART_OF_BUNDLE) 2041e76ac2bfSKalle Valo ep->ep_st.rx_bundl += 1; 2042e76ac2bfSKalle Valo 2043e76ac2bfSKalle Valo ath6kl_htc_rx_complete(ep, packet); 2044e76ac2bfSKalle Valo } 2045e76ac2bfSKalle Valo 2046e76ac2bfSKalle Valo return status; 2047e76ac2bfSKalle Valo } 2048e76ac2bfSKalle Valo 2049e76ac2bfSKalle Valo static int ath6kl_htc_rx_fetch(struct htc_target *target, 2050e76ac2bfSKalle Valo struct list_head *rx_pktq, 2051e76ac2bfSKalle Valo struct list_head *comp_pktq) 2052e76ac2bfSKalle Valo { 2053e76ac2bfSKalle Valo int fetched_pkts; 2054e76ac2bfSKalle Valo bool part_bundle = false; 2055e76ac2bfSKalle Valo int status = 0; 2056e76ac2bfSKalle Valo struct list_head tmp_rxq; 2057e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 2058e76ac2bfSKalle Valo 2059e76ac2bfSKalle Valo /* now go fetch the list of HTC packets */ 2060e76ac2bfSKalle Valo while (!list_empty(rx_pktq)) { 2061e76ac2bfSKalle Valo fetched_pkts = 0; 2062e76ac2bfSKalle Valo 2063e76ac2bfSKalle Valo INIT_LIST_HEAD(&tmp_rxq); 2064e76ac2bfSKalle Valo 2065e76ac2bfSKalle Valo if (target->rx_bndl_enable && (get_queue_depth(rx_pktq) > 1)) { 2066e76ac2bfSKalle Valo /* 2067e76ac2bfSKalle Valo * There are enough packets to attempt a 2068e76ac2bfSKalle Valo * bundle transfer and recv bundling is 2069e76ac2bfSKalle Valo * allowed. 2070e76ac2bfSKalle Valo */ 2071e76ac2bfSKalle Valo status = ath6kl_htc_rx_bundle(target, rx_pktq, 2072e76ac2bfSKalle Valo &tmp_rxq, 2073e76ac2bfSKalle Valo &fetched_pkts, 2074e76ac2bfSKalle Valo part_bundle); 2075e76ac2bfSKalle Valo if (status) 2076e76ac2bfSKalle Valo goto fail_rx; 2077e76ac2bfSKalle Valo 2078e76ac2bfSKalle Valo if (!list_empty(rx_pktq)) 2079e76ac2bfSKalle Valo part_bundle = true; 2080e76ac2bfSKalle Valo 2081e76ac2bfSKalle Valo list_splice_tail_init(&tmp_rxq, comp_pktq); 2082e76ac2bfSKalle Valo } 2083e76ac2bfSKalle Valo 2084e76ac2bfSKalle Valo if (!fetched_pkts) { 2085e76ac2bfSKalle Valo 2086e76ac2bfSKalle Valo packet = list_first_entry(rx_pktq, struct htc_packet, 2087e76ac2bfSKalle Valo list); 2088e76ac2bfSKalle Valo 2089e76ac2bfSKalle Valo /* fully synchronous */ 2090e76ac2bfSKalle Valo packet->completion = NULL; 2091e76ac2bfSKalle Valo 2092e76ac2bfSKalle Valo if (!list_is_singular(rx_pktq)) 2093e76ac2bfSKalle Valo /* 2094e76ac2bfSKalle Valo * look_aheads in all packet 2095e76ac2bfSKalle Valo * except the last one in the 2096e76ac2bfSKalle Valo * bundle must be ignored 2097e76ac2bfSKalle Valo */ 2098e76ac2bfSKalle Valo packet->info.rx.rx_flags |= 2099e76ac2bfSKalle Valo HTC_RX_PKT_IGNORE_LOOKAHEAD; 2100e76ac2bfSKalle Valo 2101e76ac2bfSKalle Valo /* go fetch the packet */ 2102e76ac2bfSKalle Valo status = ath6kl_htc_rx_packet(target, packet, 2103e76ac2bfSKalle Valo packet->act_len); 2104e76ac2bfSKalle Valo 2105e76ac2bfSKalle Valo list_move_tail(&packet->list, &tmp_rxq); 2106e76ac2bfSKalle Valo 2107e76ac2bfSKalle Valo if (status) 2108e76ac2bfSKalle Valo goto fail_rx; 2109e76ac2bfSKalle Valo 2110e76ac2bfSKalle Valo list_splice_tail_init(&tmp_rxq, comp_pktq); 2111e76ac2bfSKalle Valo } 2112e76ac2bfSKalle Valo } 2113e76ac2bfSKalle Valo 2114e76ac2bfSKalle Valo return 0; 2115e76ac2bfSKalle Valo 2116e76ac2bfSKalle Valo fail_rx: 2117e76ac2bfSKalle Valo 2118e76ac2bfSKalle Valo /* 2119e76ac2bfSKalle Valo * Cleanup any packets we allocated but didn't use to 2120e76ac2bfSKalle Valo * actually fetch any packets. 2121e76ac2bfSKalle Valo */ 2122e76ac2bfSKalle Valo 2123e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, rx_pktq, list) { 2124e76ac2bfSKalle Valo list_del(&packet->list); 2125e76ac2bfSKalle Valo htc_reclaim_rxbuf(target, packet, 2126e76ac2bfSKalle Valo &target->endpoint[packet->endpoint]); 2127e76ac2bfSKalle Valo } 2128e76ac2bfSKalle Valo 2129e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, &tmp_rxq, list) { 2130e76ac2bfSKalle Valo list_del(&packet->list); 2131e76ac2bfSKalle Valo htc_reclaim_rxbuf(target, packet, 2132e76ac2bfSKalle Valo &target->endpoint[packet->endpoint]); 2133e76ac2bfSKalle Valo } 2134e76ac2bfSKalle Valo 2135e76ac2bfSKalle Valo return status; 2136e76ac2bfSKalle Valo } 2137e76ac2bfSKalle Valo 2138e76ac2bfSKalle Valo int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target, 2139e76ac2bfSKalle Valo u32 msg_look_ahead, int *num_pkts) 2140e76ac2bfSKalle Valo { 2141e76ac2bfSKalle Valo struct htc_packet *packets, *tmp_pkt; 2142e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 2143e76ac2bfSKalle Valo struct list_head rx_pktq, comp_pktq; 2144e76ac2bfSKalle Valo int status = 0; 2145e76ac2bfSKalle Valo u32 look_aheads[HTC_HOST_MAX_MSG_PER_BUNDLE]; 2146e76ac2bfSKalle Valo int num_look_ahead = 1; 2147e76ac2bfSKalle Valo enum htc_endpoint_id id; 2148e76ac2bfSKalle Valo int n_fetched = 0; 2149e76ac2bfSKalle Valo 2150e76ac2bfSKalle Valo INIT_LIST_HEAD(&comp_pktq); 2151e76ac2bfSKalle Valo *num_pkts = 0; 2152e76ac2bfSKalle Valo 2153e76ac2bfSKalle Valo /* 2154e76ac2bfSKalle Valo * On first entry copy the look_aheads into our temp array for 2155e76ac2bfSKalle Valo * processing 2156e76ac2bfSKalle Valo */ 2157e76ac2bfSKalle Valo look_aheads[0] = msg_look_ahead; 2158e76ac2bfSKalle Valo 2159e76ac2bfSKalle Valo while (true) { 2160e76ac2bfSKalle Valo 2161e76ac2bfSKalle Valo /* 2162e76ac2bfSKalle Valo * First lookahead sets the expected endpoint IDs for all 2163e76ac2bfSKalle Valo * packets in a bundle. 2164e76ac2bfSKalle Valo */ 2165e76ac2bfSKalle Valo id = ((struct htc_frame_hdr *)&look_aheads[0])->eid; 2166e76ac2bfSKalle Valo endpoint = &target->endpoint[id]; 2167e76ac2bfSKalle Valo 2168e76ac2bfSKalle Valo if (id >= ENDPOINT_MAX) { 2169e76ac2bfSKalle Valo ath6kl_err("MsgPend, invalid endpoint in look-ahead: %d\n", 2170e76ac2bfSKalle Valo id); 2171e76ac2bfSKalle Valo status = -ENOMEM; 2172e76ac2bfSKalle Valo break; 2173e76ac2bfSKalle Valo } 2174e76ac2bfSKalle Valo 2175e76ac2bfSKalle Valo INIT_LIST_HEAD(&rx_pktq); 2176e76ac2bfSKalle Valo INIT_LIST_HEAD(&comp_pktq); 2177e76ac2bfSKalle Valo 2178e76ac2bfSKalle Valo /* 2179e76ac2bfSKalle Valo * Try to allocate as many HTC RX packets indicated by the 2180e76ac2bfSKalle Valo * look_aheads. 2181e76ac2bfSKalle Valo */ 2182e76ac2bfSKalle Valo status = ath6kl_htc_rx_alloc(target, look_aheads, 2183e76ac2bfSKalle Valo num_look_ahead, endpoint, 2184e76ac2bfSKalle Valo &rx_pktq); 2185e76ac2bfSKalle Valo if (status) 2186e76ac2bfSKalle Valo break; 2187e76ac2bfSKalle Valo 2188e76ac2bfSKalle Valo if (get_queue_depth(&rx_pktq) >= 2) 2189e76ac2bfSKalle Valo /* 2190e76ac2bfSKalle Valo * A recv bundle was detected, force IRQ status 2191e76ac2bfSKalle Valo * re-check again 2192e76ac2bfSKalle Valo */ 2193e76ac2bfSKalle Valo target->chk_irq_status_cnt = 1; 2194e76ac2bfSKalle Valo 2195e76ac2bfSKalle Valo n_fetched += get_queue_depth(&rx_pktq); 2196e76ac2bfSKalle Valo 2197e76ac2bfSKalle Valo num_look_ahead = 0; 2198e76ac2bfSKalle Valo 2199e76ac2bfSKalle Valo status = ath6kl_htc_rx_fetch(target, &rx_pktq, &comp_pktq); 2200e76ac2bfSKalle Valo 2201e76ac2bfSKalle Valo if (!status) 2202e76ac2bfSKalle Valo ath6kl_htc_rx_chk_water_mark(endpoint); 2203e76ac2bfSKalle Valo 2204e76ac2bfSKalle Valo /* Process fetched packets */ 2205e76ac2bfSKalle Valo status = ath6kl_htc_rx_process_packets(target, &comp_pktq, 2206e76ac2bfSKalle Valo look_aheads, 2207e76ac2bfSKalle Valo &num_look_ahead); 2208e76ac2bfSKalle Valo 2209e76ac2bfSKalle Valo if (!num_look_ahead || status) 2210e76ac2bfSKalle Valo break; 2211e76ac2bfSKalle Valo 2212e76ac2bfSKalle Valo /* 2213e76ac2bfSKalle Valo * For SYNCH processing, if we get here, we are running 2214e76ac2bfSKalle Valo * through the loop again due to a detected lookahead. Set 2215e76ac2bfSKalle Valo * flag that we should re-check IRQ status registers again 2216e76ac2bfSKalle Valo * before leaving IRQ processing, this can net better 2217e76ac2bfSKalle Valo * performance in high throughput situations. 2218e76ac2bfSKalle Valo */ 2219e76ac2bfSKalle Valo target->chk_irq_status_cnt = 1; 2220e76ac2bfSKalle Valo } 2221e76ac2bfSKalle Valo 2222e76ac2bfSKalle Valo if (status) { 2223e76ac2bfSKalle Valo ath6kl_err("failed to get pending recv messages: %d\n", 2224e76ac2bfSKalle Valo status); 2225e76ac2bfSKalle Valo 2226e76ac2bfSKalle Valo /* cleanup any packets in sync completion queue */ 2227e76ac2bfSKalle Valo list_for_each_entry_safe(packets, tmp_pkt, &comp_pktq, list) { 2228e76ac2bfSKalle Valo list_del(&packets->list); 2229e76ac2bfSKalle Valo htc_reclaim_rxbuf(target, packets, 2230e76ac2bfSKalle Valo &target->endpoint[packets->endpoint]); 2231e76ac2bfSKalle Valo } 2232e76ac2bfSKalle Valo 2233e76ac2bfSKalle Valo if (target->htc_flags & HTC_OP_STATE_STOPPING) { 2234e76ac2bfSKalle Valo ath6kl_warn("host is going to stop blocking receiver for htc_stop\n"); 2235e76ac2bfSKalle Valo ath6kl_hif_rx_control(target->dev, false); 2236e76ac2bfSKalle Valo } 2237e76ac2bfSKalle Valo } 2238e76ac2bfSKalle Valo 2239e76ac2bfSKalle Valo /* 2240e76ac2bfSKalle Valo * Before leaving, check to see if host ran out of buffers and 2241e76ac2bfSKalle Valo * needs to stop the receiver. 2242e76ac2bfSKalle Valo */ 2243e76ac2bfSKalle Valo if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { 2244e76ac2bfSKalle Valo ath6kl_warn("host has no rx buffers blocking receiver to prevent overrun\n"); 2245e76ac2bfSKalle Valo ath6kl_hif_rx_control(target->dev, false); 2246e76ac2bfSKalle Valo } 2247e76ac2bfSKalle Valo *num_pkts = n_fetched; 2248e76ac2bfSKalle Valo 2249e76ac2bfSKalle Valo return status; 2250e76ac2bfSKalle Valo } 2251e76ac2bfSKalle Valo 2252e76ac2bfSKalle Valo /* 2253e76ac2bfSKalle Valo * Synchronously wait for a control message from the target, 2254e76ac2bfSKalle Valo * This function is used at initialization time ONLY. At init messages 2255e76ac2bfSKalle Valo * on ENDPOINT 0 are expected. 2256e76ac2bfSKalle Valo */ 2257e76ac2bfSKalle Valo static struct htc_packet *htc_wait_for_ctrl_msg(struct htc_target *target) 2258e76ac2bfSKalle Valo { 2259e76ac2bfSKalle Valo struct htc_packet *packet = NULL; 2260e76ac2bfSKalle Valo struct htc_frame_hdr *htc_hdr; 2261e76ac2bfSKalle Valo u32 look_ahead; 2262e76ac2bfSKalle Valo 2263e76ac2bfSKalle Valo if (ath6kl_hif_poll_mboxmsg_rx(target->dev, &look_ahead, 2264e76ac2bfSKalle Valo HTC_TARGET_RESPONSE_TIMEOUT)) 2265e76ac2bfSKalle Valo return NULL; 2266e76ac2bfSKalle Valo 2267e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 2268e76ac2bfSKalle Valo "htc rx wait ctrl look_ahead 0x%X\n", look_ahead); 2269e76ac2bfSKalle Valo 2270e76ac2bfSKalle Valo htc_hdr = (struct htc_frame_hdr *)&look_ahead; 2271e76ac2bfSKalle Valo 2272e76ac2bfSKalle Valo if (htc_hdr->eid != ENDPOINT_0) 2273e76ac2bfSKalle Valo return NULL; 2274e76ac2bfSKalle Valo 2275e76ac2bfSKalle Valo packet = htc_get_control_buf(target, false); 2276e76ac2bfSKalle Valo 2277e76ac2bfSKalle Valo if (!packet) 2278e76ac2bfSKalle Valo return NULL; 2279e76ac2bfSKalle Valo 2280e76ac2bfSKalle Valo packet->info.rx.rx_flags = 0; 2281e76ac2bfSKalle Valo packet->info.rx.exp_hdr = look_ahead; 2282e76ac2bfSKalle Valo packet->act_len = le16_to_cpu(htc_hdr->payld_len) + HTC_HDR_LENGTH; 2283e76ac2bfSKalle Valo 2284e76ac2bfSKalle Valo if (packet->act_len > packet->buf_len) 2285e76ac2bfSKalle Valo goto fail_ctrl_rx; 2286e76ac2bfSKalle Valo 2287e76ac2bfSKalle Valo /* we want synchronous operation */ 2288e76ac2bfSKalle Valo packet->completion = NULL; 2289e76ac2bfSKalle Valo 2290e76ac2bfSKalle Valo /* get the message from the device, this will block */ 2291e76ac2bfSKalle Valo if (ath6kl_htc_rx_packet(target, packet, packet->act_len)) 2292e76ac2bfSKalle Valo goto fail_ctrl_rx; 2293e76ac2bfSKalle Valo 2294e76ac2bfSKalle Valo /* process receive header */ 2295e76ac2bfSKalle Valo packet->status = ath6kl_htc_rx_process_hdr(target, packet, NULL, NULL); 2296e76ac2bfSKalle Valo 2297e76ac2bfSKalle Valo if (packet->status) { 2298e76ac2bfSKalle Valo ath6kl_err("htc_wait_for_ctrl_msg, ath6kl_htc_rx_process_hdr failed (status = %d)\n", 2299e76ac2bfSKalle Valo packet->status); 2300e76ac2bfSKalle Valo goto fail_ctrl_rx; 2301e76ac2bfSKalle Valo } 2302e76ac2bfSKalle Valo 2303e76ac2bfSKalle Valo return packet; 2304e76ac2bfSKalle Valo 2305e76ac2bfSKalle Valo fail_ctrl_rx: 2306e76ac2bfSKalle Valo if (packet != NULL) { 2307e76ac2bfSKalle Valo htc_rxpkt_reset(packet); 2308e76ac2bfSKalle Valo reclaim_rx_ctrl_buf(target, packet); 2309e76ac2bfSKalle Valo } 2310e76ac2bfSKalle Valo 2311e76ac2bfSKalle Valo return NULL; 2312e76ac2bfSKalle Valo } 2313e76ac2bfSKalle Valo 2314e76ac2bfSKalle Valo static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target, 2315e76ac2bfSKalle Valo struct list_head *pkt_queue) 2316e76ac2bfSKalle Valo { 2317e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 2318e76ac2bfSKalle Valo struct htc_packet *first_pkt; 2319e76ac2bfSKalle Valo bool rx_unblock = false; 2320e76ac2bfSKalle Valo int status = 0, depth; 2321e76ac2bfSKalle Valo 2322e76ac2bfSKalle Valo if (list_empty(pkt_queue)) 2323e76ac2bfSKalle Valo return -ENOMEM; 2324e76ac2bfSKalle Valo 2325e76ac2bfSKalle Valo first_pkt = list_first_entry(pkt_queue, struct htc_packet, list); 2326e76ac2bfSKalle Valo 2327e76ac2bfSKalle Valo if (first_pkt->endpoint >= ENDPOINT_MAX) 2328e76ac2bfSKalle Valo return status; 2329e76ac2bfSKalle Valo 2330e76ac2bfSKalle Valo depth = get_queue_depth(pkt_queue); 2331e76ac2bfSKalle Valo 2332e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 2333e76ac2bfSKalle Valo "htc rx add multiple ep id %d cnt %d len %d\n", 2334e76ac2bfSKalle Valo first_pkt->endpoint, depth, first_pkt->buf_len); 2335e76ac2bfSKalle Valo 2336e76ac2bfSKalle Valo endpoint = &target->endpoint[first_pkt->endpoint]; 2337e76ac2bfSKalle Valo 2338e76ac2bfSKalle Valo if (target->htc_flags & HTC_OP_STATE_STOPPING) { 2339e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 2340e76ac2bfSKalle Valo 2341e76ac2bfSKalle Valo /* walk through queue and mark each one canceled */ 2342e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { 2343e76ac2bfSKalle Valo packet->status = -ECANCELED; 2344e76ac2bfSKalle Valo list_del(&packet->list); 2345e76ac2bfSKalle Valo ath6kl_htc_rx_complete(endpoint, packet); 2346e76ac2bfSKalle Valo } 2347e76ac2bfSKalle Valo 2348e76ac2bfSKalle Valo return status; 2349e76ac2bfSKalle Valo } 2350e76ac2bfSKalle Valo 2351e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 2352e76ac2bfSKalle Valo 2353e76ac2bfSKalle Valo list_splice_tail_init(pkt_queue, &endpoint->rx_bufq); 2354e76ac2bfSKalle Valo 2355e76ac2bfSKalle Valo /* check if we are blocked waiting for a new buffer */ 2356e76ac2bfSKalle Valo if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { 2357e76ac2bfSKalle Valo if (target->ep_waiting == first_pkt->endpoint) { 2358e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 2359e76ac2bfSKalle Valo "htc rx blocked on ep %d, unblocking\n", 2360e76ac2bfSKalle Valo target->ep_waiting); 2361e76ac2bfSKalle Valo target->rx_st_flags &= ~HTC_RECV_WAIT_BUFFERS; 2362e76ac2bfSKalle Valo target->ep_waiting = ENDPOINT_MAX; 2363e76ac2bfSKalle Valo rx_unblock = true; 2364e76ac2bfSKalle Valo } 2365e76ac2bfSKalle Valo } 2366e76ac2bfSKalle Valo 2367e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 2368e76ac2bfSKalle Valo 2369e76ac2bfSKalle Valo if (rx_unblock && !(target->htc_flags & HTC_OP_STATE_STOPPING)) 2370e76ac2bfSKalle Valo /* TODO : implement a buffer threshold count? */ 2371e76ac2bfSKalle Valo ath6kl_hif_rx_control(target->dev, true); 2372e76ac2bfSKalle Valo 2373e76ac2bfSKalle Valo return status; 2374e76ac2bfSKalle Valo } 2375e76ac2bfSKalle Valo 2376e76ac2bfSKalle Valo static void ath6kl_htc_mbox_flush_rx_buf(struct htc_target *target) 2377e76ac2bfSKalle Valo { 2378e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 2379e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_pkt; 2380e76ac2bfSKalle Valo int i; 2381e76ac2bfSKalle Valo 2382e76ac2bfSKalle Valo for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { 2383e76ac2bfSKalle Valo endpoint = &target->endpoint[i]; 2384e76ac2bfSKalle Valo if (!endpoint->svc_id) 2385e76ac2bfSKalle Valo /* not in use.. */ 2386e76ac2bfSKalle Valo continue; 2387e76ac2bfSKalle Valo 2388e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 2389e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_pkt, 2390e76ac2bfSKalle Valo &endpoint->rx_bufq, list) { 2391e76ac2bfSKalle Valo list_del(&packet->list); 2392e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 2393e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 2394e76ac2bfSKalle Valo "htc rx flush pkt 0x%p len %d ep %d\n", 2395e76ac2bfSKalle Valo packet, packet->buf_len, 2396e76ac2bfSKalle Valo packet->endpoint); 2397e76ac2bfSKalle Valo /* 2398e76ac2bfSKalle Valo * packets in rx_bufq of endpoint 0 have originally 2399e76ac2bfSKalle Valo * been queued from target->free_ctrl_rxbuf where 2400e76ac2bfSKalle Valo * packet and packet->buf_start are allocated 2401e76ac2bfSKalle Valo * separately using kmalloc(). For other endpoint 2402e76ac2bfSKalle Valo * rx_bufq, it is allocated as skb where packet is 2403e76ac2bfSKalle Valo * skb->head. Take care of this difference while freeing 2404e76ac2bfSKalle Valo * the memory. 2405e76ac2bfSKalle Valo */ 2406e76ac2bfSKalle Valo if (packet->endpoint == ENDPOINT_0) { 2407e76ac2bfSKalle Valo kfree(packet->buf_start); 2408e76ac2bfSKalle Valo kfree(packet); 2409e76ac2bfSKalle Valo } else { 2410e76ac2bfSKalle Valo dev_kfree_skb(packet->pkt_cntxt); 2411e76ac2bfSKalle Valo } 2412e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 2413e76ac2bfSKalle Valo } 2414e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 2415e76ac2bfSKalle Valo } 2416e76ac2bfSKalle Valo } 2417e76ac2bfSKalle Valo 2418e76ac2bfSKalle Valo static int ath6kl_htc_mbox_conn_service(struct htc_target *target, 2419e76ac2bfSKalle Valo struct htc_service_connect_req *conn_req, 2420e76ac2bfSKalle Valo struct htc_service_connect_resp *conn_resp) 2421e76ac2bfSKalle Valo { 2422e76ac2bfSKalle Valo struct htc_packet *rx_pkt = NULL; 2423e76ac2bfSKalle Valo struct htc_packet *tx_pkt = NULL; 2424e76ac2bfSKalle Valo struct htc_conn_service_resp *resp_msg; 2425e76ac2bfSKalle Valo struct htc_conn_service_msg *conn_msg; 2426e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 2427e76ac2bfSKalle Valo enum htc_endpoint_id assigned_ep = ENDPOINT_MAX; 2428e76ac2bfSKalle Valo unsigned int max_msg_sz = 0; 2429e76ac2bfSKalle Valo int status = 0; 2430e76ac2bfSKalle Valo u16 msg_id; 2431e76ac2bfSKalle Valo 2432e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_HTC, 2433e76ac2bfSKalle Valo "htc connect service target 0x%p service id 0x%x\n", 2434e76ac2bfSKalle Valo target, conn_req->svc_id); 2435e76ac2bfSKalle Valo 2436e76ac2bfSKalle Valo if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) { 2437e76ac2bfSKalle Valo /* special case for pseudo control service */ 2438e76ac2bfSKalle Valo assigned_ep = ENDPOINT_0; 2439e76ac2bfSKalle Valo max_msg_sz = HTC_MAX_CTRL_MSG_LEN; 2440e76ac2bfSKalle Valo } else { 2441e76ac2bfSKalle Valo /* allocate a packet to send to the target */ 2442e76ac2bfSKalle Valo tx_pkt = htc_get_control_buf(target, true); 2443e76ac2bfSKalle Valo 2444e76ac2bfSKalle Valo if (!tx_pkt) 2445e76ac2bfSKalle Valo return -ENOMEM; 2446e76ac2bfSKalle Valo 2447e76ac2bfSKalle Valo conn_msg = (struct htc_conn_service_msg *)tx_pkt->buf; 2448e76ac2bfSKalle Valo memset(conn_msg, 0, sizeof(*conn_msg)); 2449e76ac2bfSKalle Valo conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID); 2450e76ac2bfSKalle Valo conn_msg->svc_id = cpu_to_le16(conn_req->svc_id); 2451e76ac2bfSKalle Valo conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags); 2452e76ac2bfSKalle Valo 2453e76ac2bfSKalle Valo set_htc_pkt_info(tx_pkt, NULL, (u8 *) conn_msg, 2454e76ac2bfSKalle Valo sizeof(*conn_msg) + conn_msg->svc_meta_len, 2455e76ac2bfSKalle Valo ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); 2456e76ac2bfSKalle Valo 2457e76ac2bfSKalle Valo /* we want synchronous operation */ 2458e76ac2bfSKalle Valo tx_pkt->completion = NULL; 2459e76ac2bfSKalle Valo ath6kl_htc_tx_prep_pkt(tx_pkt, 0, 0, 0); 2460e76ac2bfSKalle Valo status = ath6kl_htc_tx_issue(target, tx_pkt); 2461e76ac2bfSKalle Valo 2462e76ac2bfSKalle Valo if (status) 2463e76ac2bfSKalle Valo goto fail_tx; 2464e76ac2bfSKalle Valo 2465e76ac2bfSKalle Valo /* wait for response */ 2466e76ac2bfSKalle Valo rx_pkt = htc_wait_for_ctrl_msg(target); 2467e76ac2bfSKalle Valo 2468e76ac2bfSKalle Valo if (!rx_pkt) { 2469e76ac2bfSKalle Valo status = -ENOMEM; 2470e76ac2bfSKalle Valo goto fail_tx; 2471e76ac2bfSKalle Valo } 2472e76ac2bfSKalle Valo 2473e76ac2bfSKalle Valo resp_msg = (struct htc_conn_service_resp *)rx_pkt->buf; 2474e76ac2bfSKalle Valo msg_id = le16_to_cpu(resp_msg->msg_id); 2475e76ac2bfSKalle Valo 2476e76ac2bfSKalle Valo if ((msg_id != HTC_MSG_CONN_SVC_RESP_ID) || 2477e76ac2bfSKalle Valo (rx_pkt->act_len < sizeof(*resp_msg))) { 2478e76ac2bfSKalle Valo status = -ENOMEM; 2479e76ac2bfSKalle Valo goto fail_tx; 2480e76ac2bfSKalle Valo } 2481e76ac2bfSKalle Valo 2482e76ac2bfSKalle Valo conn_resp->resp_code = resp_msg->status; 2483e76ac2bfSKalle Valo /* check response status */ 2484e76ac2bfSKalle Valo if (resp_msg->status != HTC_SERVICE_SUCCESS) { 2485e76ac2bfSKalle Valo ath6kl_err("target failed service 0x%X connect request (status:%d)\n", 2486e76ac2bfSKalle Valo resp_msg->svc_id, resp_msg->status); 2487e76ac2bfSKalle Valo status = -ENOMEM; 2488e76ac2bfSKalle Valo goto fail_tx; 2489e76ac2bfSKalle Valo } 2490e76ac2bfSKalle Valo 2491e76ac2bfSKalle Valo assigned_ep = (enum htc_endpoint_id)resp_msg->eid; 2492e76ac2bfSKalle Valo max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz); 2493e76ac2bfSKalle Valo } 2494e76ac2bfSKalle Valo 2495e76ac2bfSKalle Valo if (assigned_ep >= ENDPOINT_MAX || !max_msg_sz) { 2496e76ac2bfSKalle Valo status = -ENOMEM; 2497e76ac2bfSKalle Valo goto fail_tx; 2498e76ac2bfSKalle Valo } 2499e76ac2bfSKalle Valo 2500e76ac2bfSKalle Valo endpoint = &target->endpoint[assigned_ep]; 2501e76ac2bfSKalle Valo endpoint->eid = assigned_ep; 2502e76ac2bfSKalle Valo if (endpoint->svc_id) { 2503e76ac2bfSKalle Valo status = -ENOMEM; 2504e76ac2bfSKalle Valo goto fail_tx; 2505e76ac2bfSKalle Valo } 2506e76ac2bfSKalle Valo 2507e76ac2bfSKalle Valo /* return assigned endpoint to caller */ 2508e76ac2bfSKalle Valo conn_resp->endpoint = assigned_ep; 2509e76ac2bfSKalle Valo conn_resp->len_max = max_msg_sz; 2510e76ac2bfSKalle Valo 2511e76ac2bfSKalle Valo /* setup the endpoint */ 2512e76ac2bfSKalle Valo 2513e76ac2bfSKalle Valo /* this marks the endpoint in use */ 2514e76ac2bfSKalle Valo endpoint->svc_id = conn_req->svc_id; 2515e76ac2bfSKalle Valo 2516e76ac2bfSKalle Valo endpoint->max_txq_depth = conn_req->max_txq_depth; 2517e76ac2bfSKalle Valo endpoint->len_max = max_msg_sz; 2518e76ac2bfSKalle Valo endpoint->ep_cb = conn_req->ep_cb; 2519e76ac2bfSKalle Valo endpoint->cred_dist.svc_id = conn_req->svc_id; 2520e76ac2bfSKalle Valo endpoint->cred_dist.htc_ep = endpoint; 2521e76ac2bfSKalle Valo endpoint->cred_dist.endpoint = assigned_ep; 2522e76ac2bfSKalle Valo endpoint->cred_dist.cred_sz = target->tgt_cred_sz; 2523e76ac2bfSKalle Valo 2524e76ac2bfSKalle Valo switch (endpoint->svc_id) { 2525e76ac2bfSKalle Valo case WMI_DATA_BK_SVC: 2526e76ac2bfSKalle Valo endpoint->tx_drop_packet_threshold = MAX_DEF_COOKIE_NUM / 3; 2527e76ac2bfSKalle Valo break; 2528e76ac2bfSKalle Valo default: 2529e76ac2bfSKalle Valo endpoint->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM; 2530e76ac2bfSKalle Valo break; 2531e76ac2bfSKalle Valo } 2532e76ac2bfSKalle Valo 2533e76ac2bfSKalle Valo if (conn_req->max_rxmsg_sz) { 2534e76ac2bfSKalle Valo /* 2535e76ac2bfSKalle Valo * Override cred_per_msg calculation, this optimizes 2536e76ac2bfSKalle Valo * the credit-low indications since the host will actually 2537e76ac2bfSKalle Valo * issue smaller messages in the Send path. 2538e76ac2bfSKalle Valo */ 2539e76ac2bfSKalle Valo if (conn_req->max_rxmsg_sz > max_msg_sz) { 2540e76ac2bfSKalle Valo status = -ENOMEM; 2541e76ac2bfSKalle Valo goto fail_tx; 2542e76ac2bfSKalle Valo } 2543e76ac2bfSKalle Valo endpoint->cred_dist.cred_per_msg = 2544e76ac2bfSKalle Valo conn_req->max_rxmsg_sz / target->tgt_cred_sz; 2545e76ac2bfSKalle Valo } else 2546e76ac2bfSKalle Valo endpoint->cred_dist.cred_per_msg = 2547e76ac2bfSKalle Valo max_msg_sz / target->tgt_cred_sz; 2548e76ac2bfSKalle Valo 2549e76ac2bfSKalle Valo if (!endpoint->cred_dist.cred_per_msg) 2550e76ac2bfSKalle Valo endpoint->cred_dist.cred_per_msg = 1; 2551e76ac2bfSKalle Valo 2552e76ac2bfSKalle Valo /* save local connection flags */ 2553e76ac2bfSKalle Valo endpoint->conn_flags = conn_req->flags; 2554e76ac2bfSKalle Valo 2555e76ac2bfSKalle Valo fail_tx: 2556e76ac2bfSKalle Valo if (tx_pkt) 2557e76ac2bfSKalle Valo htc_reclaim_txctrl_buf(target, tx_pkt); 2558e76ac2bfSKalle Valo 2559e76ac2bfSKalle Valo if (rx_pkt) { 2560e76ac2bfSKalle Valo htc_rxpkt_reset(rx_pkt); 2561e76ac2bfSKalle Valo reclaim_rx_ctrl_buf(target, rx_pkt); 2562e76ac2bfSKalle Valo } 2563e76ac2bfSKalle Valo 2564e76ac2bfSKalle Valo return status; 2565e76ac2bfSKalle Valo } 2566e76ac2bfSKalle Valo 2567e76ac2bfSKalle Valo static void reset_ep_state(struct htc_target *target) 2568e76ac2bfSKalle Valo { 2569e76ac2bfSKalle Valo struct htc_endpoint *endpoint; 2570e76ac2bfSKalle Valo int i; 2571e76ac2bfSKalle Valo 2572e76ac2bfSKalle Valo for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { 2573e76ac2bfSKalle Valo endpoint = &target->endpoint[i]; 2574e76ac2bfSKalle Valo memset(&endpoint->cred_dist, 0, sizeof(endpoint->cred_dist)); 2575e76ac2bfSKalle Valo endpoint->svc_id = 0; 2576e76ac2bfSKalle Valo endpoint->len_max = 0; 2577e76ac2bfSKalle Valo endpoint->max_txq_depth = 0; 2578e76ac2bfSKalle Valo memset(&endpoint->ep_st, 0, 2579e76ac2bfSKalle Valo sizeof(endpoint->ep_st)); 2580e76ac2bfSKalle Valo INIT_LIST_HEAD(&endpoint->rx_bufq); 2581e76ac2bfSKalle Valo INIT_LIST_HEAD(&endpoint->txq); 2582e76ac2bfSKalle Valo endpoint->target = target; 2583e76ac2bfSKalle Valo } 2584e76ac2bfSKalle Valo 2585e76ac2bfSKalle Valo /* reset distribution list */ 2586e76ac2bfSKalle Valo /* FIXME: free existing entries */ 2587e76ac2bfSKalle Valo INIT_LIST_HEAD(&target->cred_dist_list); 2588e76ac2bfSKalle Valo } 2589e76ac2bfSKalle Valo 2590e76ac2bfSKalle Valo static int ath6kl_htc_mbox_get_rxbuf_num(struct htc_target *target, 2591e76ac2bfSKalle Valo enum htc_endpoint_id endpoint) 2592e76ac2bfSKalle Valo { 2593e76ac2bfSKalle Valo int num; 2594e76ac2bfSKalle Valo 2595e76ac2bfSKalle Valo spin_lock_bh(&target->rx_lock); 2596e76ac2bfSKalle Valo num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq)); 2597e76ac2bfSKalle Valo spin_unlock_bh(&target->rx_lock); 2598e76ac2bfSKalle Valo return num; 2599e76ac2bfSKalle Valo } 2600e76ac2bfSKalle Valo 2601e76ac2bfSKalle Valo static void htc_setup_msg_bndl(struct htc_target *target) 2602e76ac2bfSKalle Valo { 2603e76ac2bfSKalle Valo /* limit what HTC can handle */ 2604e76ac2bfSKalle Valo target->msg_per_bndl_max = min(HTC_HOST_MAX_MSG_PER_BUNDLE, 2605e76ac2bfSKalle Valo target->msg_per_bndl_max); 2606e76ac2bfSKalle Valo 2607e76ac2bfSKalle Valo if (ath6kl_hif_enable_scatter(target->dev->ar)) { 2608e76ac2bfSKalle Valo target->msg_per_bndl_max = 0; 2609e76ac2bfSKalle Valo return; 2610e76ac2bfSKalle Valo } 2611e76ac2bfSKalle Valo 2612e76ac2bfSKalle Valo /* limit bundle what the device layer can handle */ 2613e76ac2bfSKalle Valo target->msg_per_bndl_max = min(target->max_scat_entries, 2614e76ac2bfSKalle Valo target->msg_per_bndl_max); 2615e76ac2bfSKalle Valo 2616e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_BOOT, 2617e76ac2bfSKalle Valo "htc bundling allowed msg_per_bndl_max %d\n", 2618e76ac2bfSKalle Valo target->msg_per_bndl_max); 2619e76ac2bfSKalle Valo 2620e76ac2bfSKalle Valo /* Max rx bundle size is limited by the max tx bundle size */ 2621e76ac2bfSKalle Valo target->max_rx_bndl_sz = target->max_xfer_szper_scatreq; 2622e76ac2bfSKalle Valo /* Max tx bundle size if limited by the extended mbox address range */ 2623e76ac2bfSKalle Valo target->max_tx_bndl_sz = min(HIF_MBOX0_EXT_WIDTH, 2624e76ac2bfSKalle Valo target->max_xfer_szper_scatreq); 2625e76ac2bfSKalle Valo 2626e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_BOOT, "htc max_rx_bndl_sz %d max_tx_bndl_sz %d\n", 2627e76ac2bfSKalle Valo target->max_rx_bndl_sz, target->max_tx_bndl_sz); 2628e76ac2bfSKalle Valo 2629e76ac2bfSKalle Valo if (target->max_tx_bndl_sz) 2630e76ac2bfSKalle Valo /* tx_bndl_mask is enabled per AC, each has 1 bit */ 2631e76ac2bfSKalle Valo target->tx_bndl_mask = (1 << WMM_NUM_AC) - 1; 2632e76ac2bfSKalle Valo 2633e76ac2bfSKalle Valo if (target->max_rx_bndl_sz) 2634e76ac2bfSKalle Valo target->rx_bndl_enable = true; 2635e76ac2bfSKalle Valo 2636e76ac2bfSKalle Valo if ((target->tgt_cred_sz % target->block_sz) != 0) { 2637e76ac2bfSKalle Valo ath6kl_warn("credit size: %d is not block aligned! Disabling send bundling\n", 2638e76ac2bfSKalle Valo target->tgt_cred_sz); 2639e76ac2bfSKalle Valo 2640e76ac2bfSKalle Valo /* 2641e76ac2bfSKalle Valo * Disallow send bundling since the credit size is 2642e76ac2bfSKalle Valo * not aligned to a block size the I/O block 2643e76ac2bfSKalle Valo * padding will spill into the next credit buffer 2644e76ac2bfSKalle Valo * which is fatal. 2645e76ac2bfSKalle Valo */ 2646e76ac2bfSKalle Valo target->tx_bndl_mask = 0; 2647e76ac2bfSKalle Valo } 2648e76ac2bfSKalle Valo } 2649e76ac2bfSKalle Valo 2650e76ac2bfSKalle Valo static int ath6kl_htc_mbox_wait_target(struct htc_target *target) 2651e76ac2bfSKalle Valo { 2652e76ac2bfSKalle Valo struct htc_packet *packet = NULL; 2653e76ac2bfSKalle Valo struct htc_ready_ext_msg *rdy_msg; 2654e76ac2bfSKalle Valo struct htc_service_connect_req connect; 2655e76ac2bfSKalle Valo struct htc_service_connect_resp resp; 2656e76ac2bfSKalle Valo int status; 2657e76ac2bfSKalle Valo 2658e76ac2bfSKalle Valo /* FIXME: remove once USB support is implemented */ 2659e76ac2bfSKalle Valo if (target->dev->ar->hif_type == ATH6KL_HIF_TYPE_USB) { 2660e76ac2bfSKalle Valo ath6kl_err("HTC doesn't support USB yet. Patience!\n"); 2661e76ac2bfSKalle Valo return -EOPNOTSUPP; 2662e76ac2bfSKalle Valo } 2663e76ac2bfSKalle Valo 2664e76ac2bfSKalle Valo /* we should be getting 1 control message that the target is ready */ 2665e76ac2bfSKalle Valo packet = htc_wait_for_ctrl_msg(target); 2666e76ac2bfSKalle Valo 2667e76ac2bfSKalle Valo if (!packet) 2668e76ac2bfSKalle Valo return -ENOMEM; 2669e76ac2bfSKalle Valo 2670e76ac2bfSKalle Valo /* we controlled the buffer creation so it's properly aligned */ 2671e76ac2bfSKalle Valo rdy_msg = (struct htc_ready_ext_msg *)packet->buf; 2672e76ac2bfSKalle Valo 2673e76ac2bfSKalle Valo if ((le16_to_cpu(rdy_msg->ver2_0_info.msg_id) != HTC_MSG_READY_ID) || 2674e76ac2bfSKalle Valo (packet->act_len < sizeof(struct htc_ready_msg))) { 2675e76ac2bfSKalle Valo status = -ENOMEM; 2676e76ac2bfSKalle Valo goto fail_wait_target; 2677e76ac2bfSKalle Valo } 2678e76ac2bfSKalle Valo 2679e76ac2bfSKalle Valo if (!rdy_msg->ver2_0_info.cred_cnt || !rdy_msg->ver2_0_info.cred_sz) { 2680e76ac2bfSKalle Valo status = -ENOMEM; 2681e76ac2bfSKalle Valo goto fail_wait_target; 2682e76ac2bfSKalle Valo } 2683e76ac2bfSKalle Valo 2684e76ac2bfSKalle Valo target->tgt_creds = le16_to_cpu(rdy_msg->ver2_0_info.cred_cnt); 2685e76ac2bfSKalle Valo target->tgt_cred_sz = le16_to_cpu(rdy_msg->ver2_0_info.cred_sz); 2686e76ac2bfSKalle Valo 2687e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_BOOT, 2688e76ac2bfSKalle Valo "htc target ready credits %d size %d\n", 2689e76ac2bfSKalle Valo target->tgt_creds, target->tgt_cred_sz); 2690e76ac2bfSKalle Valo 2691e76ac2bfSKalle Valo /* check if this is an extended ready message */ 2692e76ac2bfSKalle Valo if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) { 2693e76ac2bfSKalle Valo /* this is an extended message */ 2694e76ac2bfSKalle Valo target->htc_tgt_ver = rdy_msg->htc_ver; 2695e76ac2bfSKalle Valo target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl; 2696e76ac2bfSKalle Valo } else { 2697e76ac2bfSKalle Valo /* legacy */ 2698e76ac2bfSKalle Valo target->htc_tgt_ver = HTC_VERSION_2P0; 2699e76ac2bfSKalle Valo target->msg_per_bndl_max = 0; 2700e76ac2bfSKalle Valo } 2701e76ac2bfSKalle Valo 2702e76ac2bfSKalle Valo ath6kl_dbg(ATH6KL_DBG_BOOT, "htc using protocol %s (%d)\n", 2703e76ac2bfSKalle Valo (target->htc_tgt_ver == HTC_VERSION_2P0) ? "2.0" : ">= 2.1", 2704e76ac2bfSKalle Valo target->htc_tgt_ver); 2705e76ac2bfSKalle Valo 2706e76ac2bfSKalle Valo if (target->msg_per_bndl_max > 0) 2707e76ac2bfSKalle Valo htc_setup_msg_bndl(target); 2708e76ac2bfSKalle Valo 2709e76ac2bfSKalle Valo /* setup our pseudo HTC control endpoint connection */ 2710e76ac2bfSKalle Valo memset(&connect, 0, sizeof(connect)); 2711e76ac2bfSKalle Valo memset(&resp, 0, sizeof(resp)); 2712e76ac2bfSKalle Valo connect.ep_cb.rx = htc_ctrl_rx; 2713e76ac2bfSKalle Valo connect.ep_cb.rx_refill = NULL; 2714e76ac2bfSKalle Valo connect.ep_cb.tx_full = NULL; 2715e76ac2bfSKalle Valo connect.max_txq_depth = NUM_CONTROL_BUFFERS; 2716e76ac2bfSKalle Valo connect.svc_id = HTC_CTRL_RSVD_SVC; 2717e76ac2bfSKalle Valo 2718e76ac2bfSKalle Valo /* connect fake service */ 2719e76ac2bfSKalle Valo status = ath6kl_htc_mbox_conn_service((void *)target, &connect, &resp); 2720e76ac2bfSKalle Valo 2721e76ac2bfSKalle Valo if (status) 2722e76ac2bfSKalle Valo /* 2723e76ac2bfSKalle Valo * FIXME: this call doesn't make sense, the caller should 2724e76ac2bfSKalle Valo * call ath6kl_htc_mbox_cleanup() when it wants remove htc 2725e76ac2bfSKalle Valo */ 2726e76ac2bfSKalle Valo ath6kl_hif_cleanup_scatter(target->dev->ar); 2727e76ac2bfSKalle Valo 2728e76ac2bfSKalle Valo fail_wait_target: 2729e76ac2bfSKalle Valo if (packet) { 2730e76ac2bfSKalle Valo htc_rxpkt_reset(packet); 2731e76ac2bfSKalle Valo reclaim_rx_ctrl_buf(target, packet); 2732e76ac2bfSKalle Valo } 2733e76ac2bfSKalle Valo 2734e76ac2bfSKalle Valo return status; 2735e76ac2bfSKalle Valo } 2736e76ac2bfSKalle Valo 2737e76ac2bfSKalle Valo /* 2738e76ac2bfSKalle Valo * Start HTC, enable interrupts and let the target know 2739e76ac2bfSKalle Valo * host has finished setup. 2740e76ac2bfSKalle Valo */ 2741e76ac2bfSKalle Valo static int ath6kl_htc_mbox_start(struct htc_target *target) 2742e76ac2bfSKalle Valo { 2743e76ac2bfSKalle Valo struct htc_packet *packet; 2744e76ac2bfSKalle Valo int status; 2745e76ac2bfSKalle Valo 2746e76ac2bfSKalle Valo memset(&target->dev->irq_proc_reg, 0, 2747e76ac2bfSKalle Valo sizeof(target->dev->irq_proc_reg)); 2748e76ac2bfSKalle Valo 2749e76ac2bfSKalle Valo /* Disable interrupts at the chip level */ 2750e76ac2bfSKalle Valo ath6kl_hif_disable_intrs(target->dev); 2751e76ac2bfSKalle Valo 2752e76ac2bfSKalle Valo target->htc_flags = 0; 2753e76ac2bfSKalle Valo target->rx_st_flags = 0; 2754e76ac2bfSKalle Valo 2755e76ac2bfSKalle Valo /* Push control receive buffers into htc control endpoint */ 2756e76ac2bfSKalle Valo while ((packet = htc_get_control_buf(target, false)) != NULL) { 2757e76ac2bfSKalle Valo status = htc_add_rxbuf(target, packet); 2758e76ac2bfSKalle Valo if (status) 2759e76ac2bfSKalle Valo return status; 2760e76ac2bfSKalle Valo } 2761e76ac2bfSKalle Valo 2762e76ac2bfSKalle Valo /* NOTE: the first entry in the distribution list is ENDPOINT_0 */ 2763e76ac2bfSKalle Valo ath6kl_credit_init(target->credit_info, &target->cred_dist_list, 2764e76ac2bfSKalle Valo target->tgt_creds); 2765e76ac2bfSKalle Valo 2766e76ac2bfSKalle Valo dump_cred_dist_stats(target); 2767e76ac2bfSKalle Valo 2768e76ac2bfSKalle Valo /* Indicate to the target of the setup completion */ 2769e76ac2bfSKalle Valo status = htc_setup_tx_complete(target); 2770e76ac2bfSKalle Valo 2771e76ac2bfSKalle Valo if (status) 2772e76ac2bfSKalle Valo return status; 2773e76ac2bfSKalle Valo 2774e76ac2bfSKalle Valo /* unmask interrupts */ 2775e76ac2bfSKalle Valo status = ath6kl_hif_unmask_intrs(target->dev); 2776e76ac2bfSKalle Valo 2777e76ac2bfSKalle Valo if (status) 2778e76ac2bfSKalle Valo ath6kl_htc_mbox_stop(target); 2779e76ac2bfSKalle Valo 2780e76ac2bfSKalle Valo return status; 2781e76ac2bfSKalle Valo } 2782e76ac2bfSKalle Valo 2783e76ac2bfSKalle Valo static int ath6kl_htc_reset(struct htc_target *target) 2784e76ac2bfSKalle Valo { 2785e76ac2bfSKalle Valo u32 block_size, ctrl_bufsz; 2786e76ac2bfSKalle Valo struct htc_packet *packet; 2787e76ac2bfSKalle Valo int i; 2788e76ac2bfSKalle Valo 2789e76ac2bfSKalle Valo reset_ep_state(target); 2790e76ac2bfSKalle Valo 2791e76ac2bfSKalle Valo block_size = target->dev->ar->mbox_info.block_size; 2792e76ac2bfSKalle Valo 2793e76ac2bfSKalle Valo ctrl_bufsz = (block_size > HTC_MAX_CTRL_MSG_LEN) ? 2794e76ac2bfSKalle Valo (block_size + HTC_HDR_LENGTH) : 2795e76ac2bfSKalle Valo (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH); 2796e76ac2bfSKalle Valo 2797e76ac2bfSKalle Valo for (i = 0; i < NUM_CONTROL_BUFFERS; i++) { 2798e76ac2bfSKalle Valo packet = kzalloc(sizeof(*packet), GFP_KERNEL); 2799e76ac2bfSKalle Valo if (!packet) 2800e76ac2bfSKalle Valo return -ENOMEM; 2801e76ac2bfSKalle Valo 2802e76ac2bfSKalle Valo packet->buf_start = kzalloc(ctrl_bufsz, GFP_KERNEL); 2803e76ac2bfSKalle Valo if (!packet->buf_start) { 2804e76ac2bfSKalle Valo kfree(packet); 2805e76ac2bfSKalle Valo return -ENOMEM; 2806e76ac2bfSKalle Valo } 2807e76ac2bfSKalle Valo 2808e76ac2bfSKalle Valo packet->buf_len = ctrl_bufsz; 2809e76ac2bfSKalle Valo if (i < NUM_CONTROL_RX_BUFFERS) { 2810e76ac2bfSKalle Valo packet->act_len = 0; 2811e76ac2bfSKalle Valo packet->buf = packet->buf_start; 2812e76ac2bfSKalle Valo packet->endpoint = ENDPOINT_0; 2813e76ac2bfSKalle Valo list_add_tail(&packet->list, &target->free_ctrl_rxbuf); 2814e76ac2bfSKalle Valo } else 2815e76ac2bfSKalle Valo list_add_tail(&packet->list, &target->free_ctrl_txbuf); 2816e76ac2bfSKalle Valo } 2817e76ac2bfSKalle Valo 2818e76ac2bfSKalle Valo return 0; 2819e76ac2bfSKalle Valo } 2820e76ac2bfSKalle Valo 2821e76ac2bfSKalle Valo /* htc_stop: stop interrupt reception, and flush all queued buffers */ 2822e76ac2bfSKalle Valo static void ath6kl_htc_mbox_stop(struct htc_target *target) 2823e76ac2bfSKalle Valo { 2824e76ac2bfSKalle Valo spin_lock_bh(&target->htc_lock); 2825e76ac2bfSKalle Valo target->htc_flags |= HTC_OP_STATE_STOPPING; 2826e76ac2bfSKalle Valo spin_unlock_bh(&target->htc_lock); 2827e76ac2bfSKalle Valo 2828e76ac2bfSKalle Valo /* 2829e76ac2bfSKalle Valo * Masking interrupts is a synchronous operation, when this 2830e76ac2bfSKalle Valo * function returns all pending HIF I/O has completed, we can 2831e76ac2bfSKalle Valo * safely flush the queues. 2832e76ac2bfSKalle Valo */ 2833e76ac2bfSKalle Valo ath6kl_hif_mask_intrs(target->dev); 2834e76ac2bfSKalle Valo 2835e76ac2bfSKalle Valo ath6kl_htc_flush_txep_all(target); 2836e76ac2bfSKalle Valo 2837e76ac2bfSKalle Valo ath6kl_htc_mbox_flush_rx_buf(target); 2838e76ac2bfSKalle Valo 2839e76ac2bfSKalle Valo ath6kl_htc_reset(target); 2840e76ac2bfSKalle Valo } 2841e76ac2bfSKalle Valo 2842e76ac2bfSKalle Valo static void *ath6kl_htc_mbox_create(struct ath6kl *ar) 2843e76ac2bfSKalle Valo { 2844e76ac2bfSKalle Valo struct htc_target *target = NULL; 2845e76ac2bfSKalle Valo int status = 0; 2846e76ac2bfSKalle Valo 2847e76ac2bfSKalle Valo target = kzalloc(sizeof(*target), GFP_KERNEL); 2848e76ac2bfSKalle Valo if (!target) { 2849e76ac2bfSKalle Valo ath6kl_err("unable to allocate memory\n"); 2850e76ac2bfSKalle Valo return NULL; 2851e76ac2bfSKalle Valo } 2852e76ac2bfSKalle Valo 2853e76ac2bfSKalle Valo target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); 2854e76ac2bfSKalle Valo if (!target->dev) { 2855e76ac2bfSKalle Valo ath6kl_err("unable to allocate memory\n"); 2856e76ac2bfSKalle Valo status = -ENOMEM; 2857e76ac2bfSKalle Valo goto err_htc_cleanup; 2858e76ac2bfSKalle Valo } 2859e76ac2bfSKalle Valo 2860e76ac2bfSKalle Valo spin_lock_init(&target->htc_lock); 2861e76ac2bfSKalle Valo spin_lock_init(&target->rx_lock); 2862e76ac2bfSKalle Valo spin_lock_init(&target->tx_lock); 2863e76ac2bfSKalle Valo 2864e76ac2bfSKalle Valo INIT_LIST_HEAD(&target->free_ctrl_txbuf); 2865e76ac2bfSKalle Valo INIT_LIST_HEAD(&target->free_ctrl_rxbuf); 2866e76ac2bfSKalle Valo INIT_LIST_HEAD(&target->cred_dist_list); 2867e76ac2bfSKalle Valo 2868e76ac2bfSKalle Valo target->dev->ar = ar; 2869e76ac2bfSKalle Valo target->dev->htc_cnxt = target; 2870e76ac2bfSKalle Valo target->ep_waiting = ENDPOINT_MAX; 2871e76ac2bfSKalle Valo 2872e76ac2bfSKalle Valo status = ath6kl_hif_setup(target->dev); 2873e76ac2bfSKalle Valo if (status) 2874e76ac2bfSKalle Valo goto err_htc_cleanup; 2875e76ac2bfSKalle Valo 2876e76ac2bfSKalle Valo status = ath6kl_htc_reset(target); 2877e76ac2bfSKalle Valo if (status) 2878e76ac2bfSKalle Valo goto err_htc_cleanup; 2879e76ac2bfSKalle Valo 2880e76ac2bfSKalle Valo return target; 2881e76ac2bfSKalle Valo 2882e76ac2bfSKalle Valo err_htc_cleanup: 2883e76ac2bfSKalle Valo ath6kl_htc_mbox_cleanup(target); 2884e76ac2bfSKalle Valo 2885e76ac2bfSKalle Valo return NULL; 2886e76ac2bfSKalle Valo } 2887e76ac2bfSKalle Valo 2888e76ac2bfSKalle Valo /* cleanup the HTC instance */ 2889e76ac2bfSKalle Valo static void ath6kl_htc_mbox_cleanup(struct htc_target *target) 2890e76ac2bfSKalle Valo { 2891e76ac2bfSKalle Valo struct htc_packet *packet, *tmp_packet; 2892e76ac2bfSKalle Valo 2893e76ac2bfSKalle Valo /* FIXME: remove check once USB support is implemented */ 2894e76ac2bfSKalle Valo if (target->dev->ar->hif_type != ATH6KL_HIF_TYPE_USB) 2895e76ac2bfSKalle Valo ath6kl_hif_cleanup_scatter(target->dev->ar); 2896e76ac2bfSKalle Valo 2897e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_packet, 2898e76ac2bfSKalle Valo &target->free_ctrl_txbuf, list) { 2899e76ac2bfSKalle Valo list_del(&packet->list); 2900e76ac2bfSKalle Valo kfree(packet->buf_start); 2901e76ac2bfSKalle Valo kfree(packet); 2902e76ac2bfSKalle Valo } 2903e76ac2bfSKalle Valo 2904e76ac2bfSKalle Valo list_for_each_entry_safe(packet, tmp_packet, 2905e76ac2bfSKalle Valo &target->free_ctrl_rxbuf, list) { 2906e76ac2bfSKalle Valo list_del(&packet->list); 2907e76ac2bfSKalle Valo kfree(packet->buf_start); 2908e76ac2bfSKalle Valo kfree(packet); 2909e76ac2bfSKalle Valo } 2910e76ac2bfSKalle Valo 2911e76ac2bfSKalle Valo kfree(target->dev); 2912e76ac2bfSKalle Valo kfree(target); 2913e76ac2bfSKalle Valo } 2914e76ac2bfSKalle Valo 2915e76ac2bfSKalle Valo static const struct ath6kl_htc_ops ath6kl_htc_mbox_ops = { 2916e76ac2bfSKalle Valo .create = ath6kl_htc_mbox_create, 2917e76ac2bfSKalle Valo .wait_target = ath6kl_htc_mbox_wait_target, 2918e76ac2bfSKalle Valo .start = ath6kl_htc_mbox_start, 2919e76ac2bfSKalle Valo .conn_service = ath6kl_htc_mbox_conn_service, 2920e76ac2bfSKalle Valo .tx = ath6kl_htc_mbox_tx, 2921e76ac2bfSKalle Valo .stop = ath6kl_htc_mbox_stop, 2922e76ac2bfSKalle Valo .cleanup = ath6kl_htc_mbox_cleanup, 2923e76ac2bfSKalle Valo .flush_txep = ath6kl_htc_mbox_flush_txep, 2924e76ac2bfSKalle Valo .flush_rx_buf = ath6kl_htc_mbox_flush_rx_buf, 2925e76ac2bfSKalle Valo .activity_changed = ath6kl_htc_mbox_activity_changed, 2926e76ac2bfSKalle Valo .get_rxbuf_num = ath6kl_htc_mbox_get_rxbuf_num, 2927e76ac2bfSKalle Valo .add_rxbuf_multiple = ath6kl_htc_mbox_add_rxbuf_multiple, 2928e76ac2bfSKalle Valo .credit_setup = ath6kl_htc_mbox_credit_setup, 2929e76ac2bfSKalle Valo }; 2930e76ac2bfSKalle Valo 2931e76ac2bfSKalle Valo void ath6kl_htc_mbox_attach(struct ath6kl *ar) 2932e76ac2bfSKalle Valo { 2933e76ac2bfSKalle Valo ar->htc_ops = &ath6kl_htc_mbox_ops; 2934e76ac2bfSKalle Valo } 2935