Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2001-2004 by David Brownell |
| 3 | * Copyright (c) 2003 Michal Sojka, for high-speed iso transfers |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software Foundation, |
| 17 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | /* this file is part of ehci-hcd.c */ |
| 21 | |
| 22 | /*-------------------------------------------------------------------------*/ |
| 23 | |
| 24 | /* |
| 25 | * EHCI scheduled transaction support: interrupt, iso, split iso |
| 26 | * These are called "periodic" transactions in the EHCI spec. |
| 27 | * |
| 28 | * Note that for interrupt transfers, the QH/QTD manipulation is shared |
| 29 | * with the "asynchronous" transaction support (control/bulk transfers). |
| 30 | * The only real difference is in how interrupt transfers are scheduled. |
| 31 | * |
| 32 | * For ISO, we make an "iso_stream" head to serve the same role as a QH. |
| 33 | * It keeps track of every ITD (or SITD) that's linked, and holds enough |
| 34 | * pre-calculated schedule data to make appending to the queue be quick. |
| 35 | */ |
| 36 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 37 | static int ehci_get_frame(struct usb_hcd *hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | /* |
| 40 | * periodic_next_shadow - return "next" pointer on shadow list |
| 41 | * @periodic: host pointer to qh/itd/sitd |
| 42 | * @tag: hardware tag for type of this record |
| 43 | */ |
| 44 | static union ehci_shadow * |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 45 | periodic_next_shadow(struct ehci_hcd *ehci, union ehci_shadow *periodic, |
| 46 | __hc32 tag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 48 | switch (hc32_to_cpu(ehci, tag)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | case Q_TYPE_QH: |
| 50 | return &periodic->qh->qh_next; |
| 51 | case Q_TYPE_FSTN: |
| 52 | return &periodic->fstn->fstn_next; |
| 53 | case Q_TYPE_ITD: |
| 54 | return &periodic->itd->itd_next; |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 55 | /* case Q_TYPE_SITD: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | default: |
| 57 | return &periodic->sitd->sitd_next; |
| 58 | } |
| 59 | } |
| 60 | |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 61 | static __hc32 * |
| 62 | shadow_next_periodic(struct ehci_hcd *ehci, union ehci_shadow *periodic, |
| 63 | __hc32 tag) |
| 64 | { |
| 65 | switch (hc32_to_cpu(ehci, tag)) { |
| 66 | /* our ehci_shadow.qh is actually software part */ |
| 67 | case Q_TYPE_QH: |
| 68 | return &periodic->qh->hw->hw_next; |
| 69 | /* others are hw parts */ |
| 70 | default: |
| 71 | return periodic->hw_next; |
| 72 | } |
| 73 | } |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* caller must hold ehci->lock */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 76 | static void periodic_unlink(struct ehci_hcd *ehci, unsigned frame, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 78 | union ehci_shadow *prev_p = &ehci->pshadow[frame]; |
| 79 | __hc32 *hw_p = &ehci->periodic[frame]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | union ehci_shadow here = *prev_p; |
| 81 | |
| 82 | /* find predecessor of "ptr"; hw and shadow lists are in sync */ |
| 83 | while (here.ptr && here.ptr != ptr) { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 84 | prev_p = periodic_next_shadow(ehci, prev_p, |
| 85 | Q_NEXT_TYPE(ehci, *hw_p)); |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 86 | hw_p = shadow_next_periodic(ehci, &here, |
| 87 | Q_NEXT_TYPE(ehci, *hw_p)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | here = *prev_p; |
| 89 | } |
| 90 | /* an interrupt entry (at list end) could have been shared */ |
| 91 | if (!here.ptr) |
| 92 | return; |
| 93 | |
| 94 | /* update shadow and hardware lists ... the old "next" pointers |
| 95 | * from ptr may still be in use, the caller updates them. |
| 96 | */ |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 97 | *prev_p = *periodic_next_shadow(ehci, &here, |
| 98 | Q_NEXT_TYPE(ehci, *hw_p)); |
Andiry Xu | 3d091a6 | 2010-11-08 17:58:35 +0800 | [diff] [blame] | 99 | |
| 100 | if (!ehci->use_dummy_qh || |
| 101 | *shadow_next_periodic(ehci, &here, Q_NEXT_TYPE(ehci, *hw_p)) |
| 102 | != EHCI_LIST_END(ehci)) |
| 103 | *hw_p = *shadow_next_periodic(ehci, &here, |
| 104 | Q_NEXT_TYPE(ehci, *hw_p)); |
| 105 | else |
Alan Stern | 4a71f24 | 2013-10-18 11:15:14 -0400 | [diff] [blame] | 106 | *hw_p = cpu_to_hc32(ehci, ehci->dummy->qh_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 109 | /*-------------------------------------------------------------------------*/ |
| 110 | |
| 111 | /* Bandwidth and TT management */ |
| 112 | |
| 113 | /* Find the TT data structure for this device; create it if necessary */ |
| 114 | static struct ehci_tt *find_tt(struct usb_device *udev) |
| 115 | { |
| 116 | struct usb_tt *utt = udev->tt; |
| 117 | struct ehci_tt *tt, **tt_index, **ptt; |
| 118 | unsigned port; |
| 119 | bool allocated_index = false; |
| 120 | |
| 121 | if (!utt) |
| 122 | return NULL; /* Not below a TT */ |
| 123 | |
| 124 | /* |
| 125 | * Find/create our data structure. |
| 126 | * For hubs with a single TT, we get it directly. |
| 127 | * For hubs with multiple TTs, there's an extra level of pointers. |
| 128 | */ |
| 129 | tt_index = NULL; |
| 130 | if (utt->multi) { |
| 131 | tt_index = utt->hcpriv; |
| 132 | if (!tt_index) { /* Create the index array */ |
| 133 | tt_index = kzalloc(utt->hub->maxchild * |
| 134 | sizeof(*tt_index), GFP_ATOMIC); |
| 135 | if (!tt_index) |
| 136 | return ERR_PTR(-ENOMEM); |
| 137 | utt->hcpriv = tt_index; |
| 138 | allocated_index = true; |
| 139 | } |
| 140 | port = udev->ttport - 1; |
| 141 | ptt = &tt_index[port]; |
| 142 | } else { |
| 143 | port = 0; |
| 144 | ptt = (struct ehci_tt **) &utt->hcpriv; |
| 145 | } |
| 146 | |
| 147 | tt = *ptt; |
| 148 | if (!tt) { /* Create the ehci_tt */ |
| 149 | struct ehci_hcd *ehci = |
| 150 | hcd_to_ehci(bus_to_hcd(udev->bus)); |
| 151 | |
| 152 | tt = kzalloc(sizeof(*tt), GFP_ATOMIC); |
| 153 | if (!tt) { |
| 154 | if (allocated_index) { |
| 155 | utt->hcpriv = NULL; |
| 156 | kfree(tt_index); |
| 157 | } |
| 158 | return ERR_PTR(-ENOMEM); |
| 159 | } |
| 160 | list_add_tail(&tt->tt_list, &ehci->tt_list); |
| 161 | INIT_LIST_HEAD(&tt->ps_list); |
| 162 | tt->usb_tt = utt; |
| 163 | tt->tt_port = port; |
| 164 | *ptt = tt; |
| 165 | } |
| 166 | |
| 167 | return tt; |
| 168 | } |
| 169 | |
| 170 | /* Release the TT above udev, if it's not in use */ |
| 171 | static void drop_tt(struct usb_device *udev) |
| 172 | { |
| 173 | struct usb_tt *utt = udev->tt; |
| 174 | struct ehci_tt *tt, **tt_index, **ptt; |
| 175 | int cnt, i; |
| 176 | |
| 177 | if (!utt || !utt->hcpriv) |
| 178 | return; /* Not below a TT, or never allocated */ |
| 179 | |
| 180 | cnt = 0; |
| 181 | if (utt->multi) { |
| 182 | tt_index = utt->hcpriv; |
| 183 | ptt = &tt_index[udev->ttport - 1]; |
| 184 | |
| 185 | /* How many entries are left in tt_index? */ |
| 186 | for (i = 0; i < utt->hub->maxchild; ++i) |
| 187 | cnt += !!tt_index[i]; |
| 188 | } else { |
| 189 | tt_index = NULL; |
| 190 | ptt = (struct ehci_tt **) &utt->hcpriv; |
| 191 | } |
| 192 | |
| 193 | tt = *ptt; |
| 194 | if (!tt || !list_empty(&tt->ps_list)) |
| 195 | return; /* never allocated, or still in use */ |
| 196 | |
| 197 | list_del(&tt->tt_list); |
| 198 | *ptt = NULL; |
| 199 | kfree(tt); |
| 200 | if (cnt == 1) { |
| 201 | utt->hcpriv = NULL; |
| 202 | kfree(tt_index); |
| 203 | } |
| 204 | } |
| 205 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 206 | static void bandwidth_dbg(struct ehci_hcd *ehci, int sign, char *type, |
| 207 | struct ehci_per_sched *ps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | { |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 209 | dev_dbg(&ps->udev->dev, |
| 210 | "ep %02x: %s %s @ %u+%u (%u.%u+%u) [%u/%u us] mask %04x\n", |
| 211 | ps->ep->desc.bEndpointAddress, |
| 212 | (sign >= 0 ? "reserve" : "release"), type, |
| 213 | (ps->bw_phase << 3) + ps->phase_uf, ps->bw_uperiod, |
| 214 | ps->phase, ps->phase_uf, ps->period, |
| 215 | ps->usecs, ps->c_usecs, ps->cs_mask); |
| 216 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 218 | static void reserve_release_intr_bandwidth(struct ehci_hcd *ehci, |
| 219 | struct ehci_qh *qh, int sign) |
| 220 | { |
| 221 | unsigned start_uf; |
| 222 | unsigned i, j, m; |
| 223 | int usecs = qh->ps.usecs; |
| 224 | int c_usecs = qh->ps.c_usecs; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 225 | int tt_usecs = qh->ps.tt_usecs; |
| 226 | struct ehci_tt *tt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 228 | if (qh->ps.phase == NO_FRAME) /* Bandwidth wasn't reserved */ |
| 229 | return; |
| 230 | start_uf = qh->ps.bw_phase << 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 232 | bandwidth_dbg(ehci, sign, "intr", &qh->ps); |
| 233 | |
| 234 | if (sign < 0) { /* Release bandwidth */ |
| 235 | usecs = -usecs; |
| 236 | c_usecs = -c_usecs; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 237 | tt_usecs = -tt_usecs; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /* Entire transaction (high speed) or start-split (full/low speed) */ |
| 241 | for (i = start_uf + qh->ps.phase_uf; i < EHCI_BANDWIDTH_SIZE; |
| 242 | i += qh->ps.bw_uperiod) |
| 243 | ehci->bandwidth[i] += usecs; |
| 244 | |
| 245 | /* Complete-split (full/low speed) */ |
| 246 | if (qh->ps.c_usecs) { |
| 247 | /* NOTE: adjustments needed for FSTN */ |
| 248 | for (i = start_uf; i < EHCI_BANDWIDTH_SIZE; |
| 249 | i += qh->ps.bw_uperiod) { |
| 250 | for ((j = 2, m = 1 << (j+8)); j < 8; (++j, m <<= 1)) { |
| 251 | if (qh->ps.cs_mask & m) |
| 252 | ehci->bandwidth[i+j] += c_usecs; |
| 253 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | } |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 256 | |
| 257 | /* FS/LS bus bandwidth */ |
| 258 | if (tt_usecs) { |
| 259 | tt = find_tt(qh->ps.udev); |
| 260 | if (sign > 0) |
| 261 | list_add_tail(&qh->ps.ps_list, &tt->ps_list); |
| 262 | else |
| 263 | list_del(&qh->ps.ps_list); |
| 264 | |
| 265 | for (i = start_uf >> 3; i < EHCI_BANDWIDTH_FRAMES; |
| 266 | i += qh->ps.bw_period) |
| 267 | tt->bandwidth[i] += tt_usecs; |
| 268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | /*-------------------------------------------------------------------------*/ |
| 272 | |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 273 | static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE], |
| 274 | struct ehci_tt *tt) |
| 275 | { |
| 276 | struct ehci_per_sched *ps; |
| 277 | unsigned uframe, uf, x; |
| 278 | u8 *budget_line; |
| 279 | |
| 280 | if (!tt) |
| 281 | return; |
| 282 | memset(budget_table, 0, EHCI_BANDWIDTH_SIZE); |
| 283 | |
| 284 | /* Add up the contributions from all the endpoints using this TT */ |
| 285 | list_for_each_entry(ps, &tt->ps_list, ps_list) { |
| 286 | for (uframe = ps->bw_phase << 3; uframe < EHCI_BANDWIDTH_SIZE; |
| 287 | uframe += ps->bw_uperiod) { |
| 288 | budget_line = &budget_table[uframe]; |
| 289 | x = ps->tt_usecs; |
| 290 | |
| 291 | /* propagate the time forward */ |
| 292 | for (uf = ps->phase_uf; uf < 8; ++uf) { |
| 293 | x += budget_line[uf]; |
| 294 | |
| 295 | /* Each microframe lasts 125 us */ |
| 296 | if (x <= 125) { |
| 297 | budget_line[uf] = x; |
| 298 | break; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 299 | } |
Geyslan G. Bem | 2fee2fe | 2016-01-25 22:45:15 -0300 | [diff] [blame] | 300 | budget_line[uf] = 125; |
| 301 | x -= 125; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 302 | } |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | static int __maybe_unused same_tt(struct usb_device *dev1, |
| 308 | struct usb_device *dev2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
| 310 | if (!dev1->tt || !dev2->tt) |
| 311 | return 0; |
| 312 | if (dev1->tt != dev2->tt) |
| 313 | return 0; |
| 314 | if (dev1->tt->multi) |
| 315 | return dev1->ttport == dev2->ttport; |
| 316 | else |
| 317 | return 1; |
| 318 | } |
| 319 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 320 | #ifdef CONFIG_USB_EHCI_TT_NEWSCHED |
| 321 | |
| 322 | /* Which uframe does the low/fullspeed transfer start in? |
| 323 | * |
| 324 | * The parameter is the mask of ssplits in "H-frame" terms |
| 325 | * and this returns the transfer start uframe in "B-frame" terms, |
| 326 | * which allows both to match, e.g. a ssplit in "H-frame" uframe 0 |
| 327 | * will cause a transfer in "B-frame" uframe 0. "B-frames" lag |
| 328 | * "H-frames" by 1 uframe. See the EHCI spec sec 4.5 and figure 4.7. |
| 329 | */ |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 330 | static inline unsigned char tt_start_uframe(struct ehci_hcd *ehci, __hc32 mask) |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 331 | { |
Geyslan G. Bem | 25d1086 | 2016-01-25 22:45:11 -0300 | [diff] [blame] | 332 | unsigned char smask = hc32_to_cpu(ehci, mask) & QH_SMASK; |
Geyslan G. Bem | 6d0febc | 2016-01-25 22:45:17 -0300 | [diff] [blame^] | 333 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 334 | if (!smask) { |
| 335 | ehci_err(ehci, "invalid empty smask!\n"); |
| 336 | /* uframe 7 can't have bw so this will indicate failure */ |
| 337 | return 7; |
| 338 | } |
| 339 | return ffs(smask) - 1; |
| 340 | } |
| 341 | |
| 342 | static const unsigned char |
Alan Stern | fdc03438 | 2013-05-28 14:03:10 -0400 | [diff] [blame] | 343 | max_tt_usecs[] = { 125, 125, 125, 125, 125, 125, 30, 0 }; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 344 | |
| 345 | /* carryover low/fullspeed bandwidth that crosses uframe boundries */ |
| 346 | static inline void carryover_tt_bandwidth(unsigned short tt_usecs[8]) |
| 347 | { |
| 348 | int i; |
Geyslan G. Bem | 6d0febc | 2016-01-25 22:45:17 -0300 | [diff] [blame^] | 349 | |
Geyslan G. Bem | 189b8ff | 2016-01-25 22:45:13 -0300 | [diff] [blame] | 350 | for (i = 0; i < 7; i++) { |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 351 | if (max_tt_usecs[i] < tt_usecs[i]) { |
| 352 | tt_usecs[i+1] += tt_usecs[i] - max_tt_usecs[i]; |
| 353 | tt_usecs[i] = max_tt_usecs[i]; |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 358 | /* |
| 359 | * Return true if the device's tt's downstream bus is available for a |
| 360 | * periodic transfer of the specified length (usecs), starting at the |
| 361 | * specified frame/uframe. Note that (as summarized in section 11.19 |
| 362 | * of the usb 2.0 spec) TTs can buffer multiple transactions for each |
| 363 | * uframe. |
| 364 | * |
| 365 | * The uframe parameter is when the fullspeed/lowspeed transfer |
| 366 | * should be executed in "B-frame" terms, which is the same as the |
| 367 | * highspeed ssplit's uframe (which is in "H-frame" terms). For example |
| 368 | * a ssplit in "H-frame" 0 causes a transfer in "B-frame" 0. |
| 369 | * See the EHCI spec sec 4.5 and fig 4.7. |
| 370 | * |
| 371 | * This checks if the full/lowspeed bus, at the specified starting uframe, |
| 372 | * has the specified bandwidth available, according to rules listed |
| 373 | * in USB 2.0 spec section 11.18.1 fig 11-60. |
| 374 | * |
| 375 | * This does not check if the transfer would exceed the max ssplit |
| 376 | * limit of 16, specified in USB 2.0 spec section 11.18.4 requirement #4, |
| 377 | * since proper scheduling limits ssplits to less than 16 per uframe. |
| 378 | */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 379 | static int tt_available( |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 380 | struct ehci_hcd *ehci, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 381 | struct ehci_per_sched *ps, |
| 382 | struct ehci_tt *tt, |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 383 | unsigned frame, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 384 | unsigned uframe |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 385 | ) |
| 386 | { |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 387 | unsigned period = ps->bw_period; |
| 388 | unsigned usecs = ps->tt_usecs; |
| 389 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 390 | if ((period == 0) || (uframe >= 7)) /* error */ |
| 391 | return 0; |
| 392 | |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 393 | for (frame &= period - 1; frame < EHCI_BANDWIDTH_FRAMES; |
| 394 | frame += period) { |
| 395 | unsigned i, uf; |
| 396 | unsigned short tt_usecs[8]; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 397 | |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 398 | if (tt->bandwidth[frame] + usecs > 900) |
| 399 | return 0; |
| 400 | |
| 401 | uf = frame << 3; |
| 402 | for (i = 0; i < 8; (++i, ++uf)) |
| 403 | tt_usecs[i] = ehci->tt_budget[uf]; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 404 | |
Xenia Ragiadakou | fea26ef | 2013-08-29 11:45:10 +0300 | [diff] [blame] | 405 | if (max_tt_usecs[uframe] <= tt_usecs[uframe]) |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 406 | return 0; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 407 | |
| 408 | /* special case for isoc transfers larger than 125us: |
| 409 | * the first and each subsequent fully used uframe |
| 410 | * must be empty, so as to not illegally delay |
| 411 | * already scheduled transactions |
| 412 | */ |
Geyslan G. Bem | 25d1086 | 2016-01-25 22:45:11 -0300 | [diff] [blame] | 413 | if (usecs > 125) { |
Dan Streetman | c065c60 | 2009-04-21 13:37:12 -0400 | [diff] [blame] | 414 | int ufs = (usecs / 125); |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 415 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 416 | for (i = uframe; i < (uframe + ufs) && i < 8; i++) |
Geyslan G. Bem | 25d1086 | 2016-01-25 22:45:11 -0300 | [diff] [blame] | 417 | if (tt_usecs[i] > 0) |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 418 | return 0; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | tt_usecs[uframe] += usecs; |
| 422 | |
| 423 | carryover_tt_bandwidth(tt_usecs); |
| 424 | |
| 425 | /* fail if the carryover pushed bw past the last uframe's limit */ |
Xenia Ragiadakou | fea26ef | 2013-08-29 11:45:10 +0300 | [diff] [blame] | 426 | if (max_tt_usecs[7] < tt_usecs[7]) |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 427 | return 0; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | return 1; |
| 431 | } |
| 432 | |
| 433 | #else |
| 434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | /* return true iff the device's transaction translator is available |
| 436 | * for a periodic transfer starting at the specified frame, using |
| 437 | * all the uframes in the mask. |
| 438 | */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 439 | static int tt_no_collision( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | struct ehci_hcd *ehci, |
| 441 | unsigned period, |
| 442 | struct usb_device *dev, |
| 443 | unsigned frame, |
| 444 | u32 uf_mask |
| 445 | ) |
| 446 | { |
| 447 | if (period == 0) /* error */ |
| 448 | return 0; |
| 449 | |
| 450 | /* note bandwidth wastage: split never follows csplit |
| 451 | * (different dev or endpoint) until the next uframe. |
| 452 | * calling convention doesn't make that distinction. |
| 453 | */ |
| 454 | for (; frame < ehci->periodic_size; frame += period) { |
| 455 | union ehci_shadow here; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 456 | __hc32 type; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 457 | struct ehci_qh_hw *hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 459 | here = ehci->pshadow[frame]; |
| 460 | type = Q_NEXT_TYPE(ehci, ehci->periodic[frame]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | while (here.ptr) { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 462 | switch (hc32_to_cpu(ehci, type)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | case Q_TYPE_ITD: |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 464 | type = Q_NEXT_TYPE(ehci, here.itd->hw_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | here = here.itd->itd_next; |
| 466 | continue; |
| 467 | case Q_TYPE_QH: |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 468 | hw = here.qh->hw; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 469 | if (same_tt(dev, here.qh->ps.udev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | u32 mask; |
| 471 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 472 | mask = hc32_to_cpu(ehci, |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 473 | hw->hw_info2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | /* "knows" no gap is needed */ |
| 475 | mask |= mask >> 8; |
| 476 | if (mask & uf_mask) |
| 477 | break; |
| 478 | } |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 479 | type = Q_NEXT_TYPE(ehci, hw->hw_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | here = here.qh->qh_next; |
| 481 | continue; |
| 482 | case Q_TYPE_SITD: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 483 | if (same_tt(dev, here.sitd->urb->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | u16 mask; |
| 485 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 486 | mask = hc32_to_cpu(ehci, here.sitd |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | ->hw_uframe); |
| 488 | /* FIXME assumes no gap for IN! */ |
| 489 | mask |= mask >> 8; |
| 490 | if (mask & uf_mask) |
| 491 | break; |
| 492 | } |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 493 | type = Q_NEXT_TYPE(ehci, here.sitd->hw_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | here = here.sitd->sitd_next; |
| 495 | continue; |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 496 | /* case Q_TYPE_FSTN: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | default: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 498 | ehci_dbg(ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | "periodic frame %d bogus type %d\n", |
| 500 | frame, type); |
| 501 | } |
| 502 | |
| 503 | /* collision or error */ |
| 504 | return 0; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | /* no collision */ |
| 509 | return 1; |
| 510 | } |
| 511 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 512 | #endif /* CONFIG_USB_EHCI_TT_NEWSCHED */ |
| 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | /*-------------------------------------------------------------------------*/ |
| 515 | |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 516 | static void enable_periodic(struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | { |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 518 | if (ehci->periodic_count++) |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 519 | return; |
David Brownell | 01c1714 | 2008-08-26 23:35:04 -0700 | [diff] [blame] | 520 | |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 521 | /* Stop waiting to turn off the periodic schedule */ |
| 522 | ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_DISABLE_PERIODIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 524 | /* Don't start the schedule until PSS is 0 */ |
| 525 | ehci_poll_PSS(ehci); |
Alan Stern | 18aafe6 | 2012-07-11 11:23:04 -0400 | [diff] [blame] | 526 | turn_on_io_watchdog(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
| 528 | |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 529 | static void disable_periodic(struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | { |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 531 | if (--ehci->periodic_count) |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 532 | return; |
David Brownell | 01c1714 | 2008-08-26 23:35:04 -0700 | [diff] [blame] | 533 | |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 534 | /* Don't turn off the schedule until PSS is 1 */ |
| 535 | ehci_poll_PSS(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | /*-------------------------------------------------------------------------*/ |
| 539 | |
| 540 | /* periodic schedule slots have iso tds (normal or split) first, then a |
| 541 | * sparse tree for active interrupt transfers. |
| 542 | * |
| 543 | * this just links in a qh; caller guarantees uframe masks are set right. |
| 544 | * no FSTN support (yet; ehci 0.96+) |
| 545 | */ |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 546 | static void qh_link_periodic(struct ehci_hcd *ehci, struct ehci_qh *qh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
| 548 | unsigned i; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 549 | unsigned period = qh->ps.period; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 551 | dev_dbg(&qh->ps.udev->dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | "link qh%d-%04x/%p start %d [%d/%d us]\n", |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 553 | period, hc32_to_cpup(ehci, &qh->hw->hw_info2) |
| 554 | & (QH_CMASK | QH_SMASK), |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 555 | qh, qh->ps.phase, qh->ps.usecs, qh->ps.c_usecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | /* high bandwidth, or otherwise every microframe */ |
| 558 | if (period == 0) |
| 559 | period = 1; |
| 560 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 561 | for (i = qh->ps.phase; i < ehci->periodic_size; i += period) { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 562 | union ehci_shadow *prev = &ehci->pshadow[i]; |
| 563 | __hc32 *hw_p = &ehci->periodic[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | union ehci_shadow here = *prev; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 565 | __hc32 type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | /* skip the iso nodes at list head */ |
| 568 | while (here.ptr) { |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 569 | type = Q_NEXT_TYPE(ehci, *hw_p); |
| 570 | if (type == cpu_to_hc32(ehci, Q_TYPE_QH)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | break; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 572 | prev = periodic_next_shadow(ehci, prev, type); |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 573 | hw_p = shadow_next_periodic(ehci, &here, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | here = *prev; |
| 575 | } |
| 576 | |
| 577 | /* sorting each branch by period (slow-->fast) |
| 578 | * enables sharing interior tree nodes |
| 579 | */ |
| 580 | while (here.ptr && qh != here.qh) { |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 581 | if (qh->ps.period > here.qh->ps.period) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | break; |
| 583 | prev = &here.qh->qh_next; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 584 | hw_p = &here.qh->hw->hw_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | here = *prev; |
| 586 | } |
| 587 | /* link in this qh, unless some earlier pass did that */ |
| 588 | if (qh != here.qh) { |
| 589 | qh->qh_next = here; |
| 590 | if (here.qh) |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 591 | qh->hw->hw_next = *hw_p; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 592 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | prev->qh = qh; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 594 | *hw_p = QH_NEXT(ehci, qh->qh_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | } |
| 596 | } |
| 597 | qh->qh_state = QH_STATE_LINKED; |
Alan Stern | ef4638f | 2009-07-31 10:41:40 -0400 | [diff] [blame] | 598 | qh->xacterrs = 0; |
Alan Stern | fcc5184 | 2016-01-25 15:42:04 -0500 | [diff] [blame] | 599 | qh->unlink_reason = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 601 | /* update per-qh bandwidth for debugfs */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 602 | ehci_to_hcd(ehci)->self.bandwidth_allocated += qh->ps.bw_period |
| 603 | ? ((qh->ps.usecs + qh->ps.c_usecs) / qh->ps.bw_period) |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 604 | : (qh->ps.usecs * 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 606 | list_add(&qh->intr_node, &ehci->intr_qh_list); |
| 607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | /* maybe enable periodic schedule processing */ |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 609 | ++ehci->intr_count; |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 610 | enable_periodic(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
| 612 | |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 613 | static void qh_unlink_periodic(struct ehci_hcd *ehci, struct ehci_qh *qh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | { |
| 615 | unsigned i; |
| 616 | unsigned period; |
| 617 | |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 618 | /* |
| 619 | * If qh is for a low/full-speed device, simply unlinking it |
| 620 | * could interfere with an ongoing split transaction. To unlink |
| 621 | * it safely would require setting the QH_INACTIVATE bit and |
| 622 | * waiting at least one frame, as described in EHCI 4.12.2.5. |
| 623 | * |
| 624 | * We won't bother with any of this. Instead, we assume that the |
| 625 | * only reason for unlinking an interrupt QH while the current URB |
| 626 | * is still active is to dequeue all the URBs (flush the whole |
| 627 | * endpoint queue). |
| 628 | * |
| 629 | * If rebalancing the periodic schedule is ever implemented, this |
| 630 | * approach will no longer be valid. |
| 631 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
| 633 | /* high bandwidth, or otherwise part of every microframe */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 634 | period = qh->ps.period ? : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 636 | for (i = qh->ps.phase; i < ehci->periodic_size; i += period) |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 637 | periodic_unlink(ehci, i, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 639 | /* update per-qh bandwidth for debugfs */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 640 | ehci_to_hcd(ehci)->self.bandwidth_allocated -= qh->ps.bw_period |
| 641 | ? ((qh->ps.usecs + qh->ps.c_usecs) / qh->ps.bw_period) |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 642 | : (qh->ps.usecs * 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 644 | dev_dbg(&qh->ps.udev->dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | "unlink qh%d-%04x/%p start %d [%d/%d us]\n", |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 646 | qh->ps.period, |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 647 | hc32_to_cpup(ehci, &qh->hw->hw_info2) & (QH_CMASK | QH_SMASK), |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 648 | qh, qh->ps.phase, qh->ps.usecs, qh->ps.c_usecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
| 650 | /* qh->qh_next still "live" to HC */ |
| 651 | qh->qh_state = QH_STATE_UNLINK; |
| 652 | qh->qh_next.ptr = NULL; |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 653 | |
| 654 | if (ehci->qh_scan_next == qh) |
| 655 | ehci->qh_scan_next = list_entry(qh->intr_node.next, |
| 656 | struct ehci_qh, intr_node); |
| 657 | list_del(&qh->intr_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 660 | static void cancel_unlink_wait_intr(struct ehci_hcd *ehci, struct ehci_qh *qh) |
| 661 | { |
| 662 | if (qh->qh_state != QH_STATE_LINKED || |
| 663 | list_empty(&qh->unlink_node)) |
| 664 | return; |
| 665 | |
| 666 | list_del_init(&qh->unlink_node); |
| 667 | |
| 668 | /* |
| 669 | * TODO: disable the event of EHCI_HRTIMER_START_UNLINK_INTR for |
| 670 | * avoiding unnecessary CPU wakeup |
| 671 | */ |
| 672 | } |
| 673 | |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 674 | static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | { |
Alan Stern | 7bc782d | 2013-03-22 13:31:11 -0400 | [diff] [blame] | 676 | /* If the QH isn't linked then there's nothing we can do. */ |
| 677 | if (qh->qh_state != QH_STATE_LINKED) |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 678 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 680 | /* if the qh is waiting for unlink, cancel it now */ |
| 681 | cancel_unlink_wait_intr(ehci, qh); |
| 682 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 683 | qh_unlink_periodic(ehci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 685 | /* Make sure the unlinks are visible before starting the timer */ |
| 686 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 688 | /* |
| 689 | * The EHCI spec doesn't say how long it takes the controller to |
| 690 | * stop accessing an unlinked interrupt QH. The timer delay is |
| 691 | * 9 uframes; presumably that will be long enough. |
| 692 | */ |
| 693 | qh->unlink_cycle = ehci->intr_unlink_cycle; |
| 694 | |
| 695 | /* New entries go at the end of the intr_unlink list */ |
Alan Stern | 6e01875 | 2013-03-22 13:31:45 -0400 | [diff] [blame] | 696 | list_add_tail(&qh->unlink_node, &ehci->intr_unlink); |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 697 | |
| 698 | if (ehci->intr_unlinking) |
| 699 | ; /* Avoid recursive calls */ |
| 700 | else if (ehci->rh_state < EHCI_RH_RUNNING) |
| 701 | ehci_handle_intr_unlinks(ehci); |
Alan Stern | 6e01875 | 2013-03-22 13:31:45 -0400 | [diff] [blame] | 702 | else if (ehci->intr_unlink.next == &qh->unlink_node) { |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 703 | ehci_enable_event(ehci, EHCI_HRTIMER_UNLINK_INTR, true); |
| 704 | ++ehci->intr_unlink_cycle; |
| 705 | } |
| 706 | } |
| 707 | |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 708 | /* |
| 709 | * It is common only one intr URB is scheduled on one qh, and |
| 710 | * given complete() is run in tasklet context, introduce a bit |
| 711 | * delay to avoid unlink qh too early. |
| 712 | */ |
| 713 | static void start_unlink_intr_wait(struct ehci_hcd *ehci, |
| 714 | struct ehci_qh *qh) |
| 715 | { |
| 716 | qh->unlink_cycle = ehci->intr_unlink_wait_cycle; |
| 717 | |
| 718 | /* New entries go at the end of the intr_unlink_wait list */ |
| 719 | list_add_tail(&qh->unlink_node, &ehci->intr_unlink_wait); |
| 720 | |
| 721 | if (ehci->rh_state < EHCI_RH_RUNNING) |
| 722 | ehci_handle_start_intr_unlinks(ehci); |
| 723 | else if (ehci->intr_unlink_wait.next == &qh->unlink_node) { |
| 724 | ehci_enable_event(ehci, EHCI_HRTIMER_START_UNLINK_INTR, true); |
| 725 | ++ehci->intr_unlink_wait_cycle; |
| 726 | } |
| 727 | } |
| 728 | |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 729 | static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh) |
| 730 | { |
| 731 | struct ehci_qh_hw *hw = qh->hw; |
| 732 | int rc; |
| 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | qh->qh_state = QH_STATE_IDLE; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 735 | hw->hw_next = EHCI_LIST_END(ehci); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 736 | |
Alan Stern | 79bcf7b | 2013-03-22 13:30:56 -0400 | [diff] [blame] | 737 | if (!list_empty(&qh->qtd_list)) |
| 738 | qh_completions(ehci, qh); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 739 | |
| 740 | /* reschedule QH iff another request is queued */ |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 741 | if (!list_empty(&qh->qtd_list) && ehci->rh_state == EHCI_RH_RUNNING) { |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 742 | rc = qh_schedule(ehci, qh); |
Alan Stern | 077f5f1 | 2013-05-29 11:33:52 -0400 | [diff] [blame] | 743 | if (rc == 0) { |
| 744 | qh_refresh(ehci, qh); |
| 745 | qh_link_periodic(ehci, qh); |
| 746 | } |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 747 | |
| 748 | /* An error here likely indicates handshake failure |
| 749 | * or no space left in the schedule. Neither fault |
| 750 | * should happen often ... |
| 751 | * |
| 752 | * FIXME kill the now-dysfunctional queued urbs |
| 753 | */ |
Alan Stern | 077f5f1 | 2013-05-29 11:33:52 -0400 | [diff] [blame] | 754 | else { |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 755 | ehci_err(ehci, "can't reschedule qh %p, err %d\n", |
| 756 | qh, rc); |
Alan Stern | 077f5f1 | 2013-05-29 11:33:52 -0400 | [diff] [blame] | 757 | } |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 758 | } |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 759 | |
| 760 | /* maybe turn off periodic schedule */ |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 761 | --ehci->intr_count; |
Alan Stern | 3ca9aeb | 2012-07-11 11:22:05 -0400 | [diff] [blame] | 762 | disable_periodic(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | /*-------------------------------------------------------------------------*/ |
| 766 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 767 | static int check_period( |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 768 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | unsigned frame, |
| 770 | unsigned uframe, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 771 | unsigned uperiod, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | unsigned usecs |
| 773 | ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | /* complete split running into next frame? |
| 775 | * given FSTN support, we could sometimes check... |
| 776 | */ |
| 777 | if (uframe >= 8) |
| 778 | return 0; |
| 779 | |
Kirill Smelkov | cc62a7e | 2011-07-03 20:36:57 +0400 | [diff] [blame] | 780 | /* convert "usecs we need" to "max already claimed" */ |
| 781 | usecs = ehci->uframe_periodic_max - usecs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 783 | for (uframe += frame << 3; uframe < EHCI_BANDWIDTH_SIZE; |
| 784 | uframe += uperiod) { |
| 785 | if (ehci->bandwidth[uframe] > usecs) |
| 786 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 789 | /* success! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | return 1; |
| 791 | } |
| 792 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 793 | static int check_intr_schedule( |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 794 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | unsigned frame, |
| 796 | unsigned uframe, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 797 | struct ehci_qh *qh, |
Alan Stern | 5d8f681 | 2013-10-18 11:13:08 -0400 | [diff] [blame] | 798 | unsigned *c_maskp, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 799 | struct ehci_tt *tt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | ) |
| 801 | { |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 802 | int retval = -ENOSPC; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 803 | u8 mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 805 | if (qh->ps.c_usecs && uframe >= 6) /* FSTN territory? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | goto done; |
| 807 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 808 | if (!check_period(ehci, frame, uframe, qh->ps.bw_uperiod, qh->ps.usecs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | goto done; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 810 | if (!qh->ps.c_usecs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | retval = 0; |
| 812 | *c_maskp = 0; |
| 813 | goto done; |
| 814 | } |
| 815 | |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 816 | #ifdef CONFIG_USB_EHCI_TT_NEWSCHED |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 817 | if (tt_available(ehci, &qh->ps, tt, frame, uframe)) { |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 818 | unsigned i; |
| 819 | |
| 820 | /* TODO : this may need FSTN for SSPLIT in uframe 5. */ |
Alan Stern | e24371a | 2013-10-11 11:28:12 -0400 | [diff] [blame] | 821 | for (i = uframe+2; i < 8 && i <= uframe+4; i++) |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 822 | if (!check_period(ehci, frame, i, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 823 | qh->ps.bw_uperiod, qh->ps.c_usecs)) |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 824 | goto done; |
| 825 | else |
| 826 | mask |= 1 << i; |
| 827 | |
| 828 | retval = 0; |
| 829 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 830 | *c_maskp = mask; |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 831 | } |
| 832 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | /* Make sure this tt's buffer is also available for CSPLITs. |
| 834 | * We pessimize a bit; probably the typical full speed case |
| 835 | * doesn't need the second CSPLIT. |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 836 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | * NOTE: both SPLIT and CSPLIT could be checked in just |
| 838 | * one smart pass... |
| 839 | */ |
| 840 | mask = 0x03 << (uframe + qh->gap_uf); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 841 | *c_maskp = mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | mask |= 1 << uframe; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 844 | if (tt_no_collision(ehci, qh->ps.bw_period, qh->ps.udev, frame, mask)) { |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 845 | if (!check_period(ehci, frame, uframe + qh->gap_uf + 1, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 846 | qh->ps.bw_uperiod, qh->ps.c_usecs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | goto done; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 848 | if (!check_period(ehci, frame, uframe + qh->gap_uf, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 849 | qh->ps.bw_uperiod, qh->ps.c_usecs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | goto done; |
| 851 | retval = 0; |
| 852 | } |
Dan Streetman | ba47f66 | 2006-05-24 09:39:16 -0700 | [diff] [blame] | 853 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | done: |
| 855 | return retval; |
| 856 | } |
| 857 | |
| 858 | /* "first fit" scheduling policy used the first time through, |
| 859 | * or when the previous schedule slot can't be re-used. |
| 860 | */ |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 861 | static int qh_schedule(struct ehci_hcd *ehci, struct ehci_qh *qh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | { |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 863 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | unsigned uframe; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 865 | unsigned c_mask; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 866 | struct ehci_qh_hw *hw = qh->hw; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 867 | struct ehci_tt *tt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 869 | hw->hw_next = EHCI_LIST_END(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
| 871 | /* reuse the previous schedule slots, if we can */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 872 | if (qh->ps.phase != NO_FRAME) { |
| 873 | ehci_dbg(ehci, "reused qh %p schedule\n", qh); |
| 874 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | } |
| 876 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 877 | uframe = 0; |
| 878 | c_mask = 0; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 879 | tt = find_tt(qh->ps.udev); |
| 880 | if (IS_ERR(tt)) { |
| 881 | status = PTR_ERR(tt); |
| 882 | goto done; |
| 883 | } |
| 884 | compute_tt_budget(ehci->tt_budget, tt); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | /* else scan the schedule to find a group of slots such that all |
| 887 | * uframes have enough periodic bandwidth available. |
| 888 | */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 889 | /* "normal" case, uframing flexible except with splits */ |
| 890 | if (qh->ps.bw_period) { |
| 891 | int i; |
| 892 | unsigned frame; |
Alan Stern | 68335e8 | 2009-05-22 17:02:33 -0400 | [diff] [blame] | 893 | |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 894 | for (i = qh->ps.bw_period; i > 0; --i) { |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 895 | frame = ++ehci->random_frame & (qh->ps.bw_period - 1); |
| 896 | for (uframe = 0; uframe < 8; uframe++) { |
| 897 | status = check_intr_schedule(ehci, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 898 | frame, uframe, qh, &c_mask, tt); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 899 | if (status == 0) |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 900 | goto got_it; |
Alan Stern | 68335e8 | 2009-05-22 17:02:33 -0400 | [diff] [blame] | 901 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 904 | /* qh->ps.bw_period == 0 means every uframe */ |
| 905 | } else { |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 906 | status = check_intr_schedule(ehci, 0, 0, qh, &c_mask, tt); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 907 | } |
| 908 | if (status) |
| 909 | goto done; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 910 | |
| 911 | got_it: |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 912 | qh->ps.phase = (qh->ps.period ? ehci->random_frame & |
| 913 | (qh->ps.period - 1) : 0); |
| 914 | qh->ps.bw_phase = qh->ps.phase & (qh->ps.bw_period - 1); |
| 915 | qh->ps.phase_uf = uframe; |
| 916 | qh->ps.cs_mask = qh->ps.period ? |
| 917 | (c_mask << 8) | (1 << uframe) : |
| 918 | QH_SMASK; |
| 919 | |
| 920 | /* reset S-frame and (maybe) C-frame masks */ |
| 921 | hw->hw_info2 &= cpu_to_hc32(ehci, ~(QH_CMASK | QH_SMASK)); |
| 922 | hw->hw_info2 |= cpu_to_hc32(ehci, qh->ps.cs_mask); |
| 923 | reserve_release_intr_bandwidth(ehci, qh, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | done: |
| 926 | return status; |
| 927 | } |
| 928 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 929 | static int intr_submit( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | struct urb *urb, |
| 932 | struct list_head *qtd_list, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 933 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | ) { |
| 935 | unsigned epnum; |
| 936 | unsigned long flags; |
| 937 | struct ehci_qh *qh; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 938 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | struct list_head empty; |
| 940 | |
| 941 | /* get endpoint and transfer/schedule data */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 942 | epnum = urb->ep->desc.bEndpointAddress; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 944 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 946 | if (unlikely(!HCD_HW_ACCESSIBLE(ehci_to_hcd(ehci)))) { |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 947 | status = -ESHUTDOWN; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 948 | goto done_not_linked; |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 949 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 950 | status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb); |
| 951 | if (unlikely(status)) |
| 952 | goto done_not_linked; |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | /* get qh and force any scheduling errors */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 955 | INIT_LIST_HEAD(&empty); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 956 | qh = qh_append_tds(ehci, urb, &empty, epnum, &urb->ep->hcpriv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | if (qh == NULL) { |
| 958 | status = -ENOMEM; |
| 959 | goto done; |
| 960 | } |
| 961 | if (qh->qh_state == QH_STATE_IDLE) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 962 | status = qh_schedule(ehci, qh); |
| 963 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | goto done; |
| 965 | } |
| 966 | |
| 967 | /* then queue the urb's tds to the qh */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 968 | qh = qh_append_tds(ehci, urb, qtd_list, epnum, &urb->ep->hcpriv); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 969 | BUG_ON(qh == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Alan Stern | c1fdb68 | 2013-03-22 13:30:43 -0400 | [diff] [blame] | 971 | /* stuff into the periodic schedule */ |
| 972 | if (qh->qh_state == QH_STATE_IDLE) { |
| 973 | qh_refresh(ehci, qh); |
| 974 | qh_link_periodic(ehci, qh); |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 975 | } else { |
| 976 | /* cancel unlink wait for the qh */ |
| 977 | cancel_unlink_wait_intr(ehci, qh); |
Alan Stern | c1fdb68 | 2013-03-22 13:30:43 -0400 | [diff] [blame] | 978 | } |
| 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | /* ... update usbfs periodic stats */ |
| 981 | ehci_to_hcd(ehci)->self.bandwidth_int_reqs++; |
| 982 | |
| 983 | done: |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 984 | if (unlikely(status)) |
| 985 | usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb); |
| 986 | done_not_linked: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 987 | spin_unlock_irqrestore(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | if (status) |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 989 | qtd_list_free(ehci, urb, qtd_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
| 991 | return status; |
| 992 | } |
| 993 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 994 | static void scan_intr(struct ehci_hcd *ehci) |
| 995 | { |
| 996 | struct ehci_qh *qh; |
| 997 | |
| 998 | list_for_each_entry_safe(qh, ehci->qh_scan_next, &ehci->intr_qh_list, |
| 999 | intr_node) { |
Alan Stern | 79bcf7b | 2013-03-22 13:30:56 -0400 | [diff] [blame] | 1000 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 1001 | /* clean any finished work for this qh */ |
| 1002 | if (!list_empty(&qh->qtd_list)) { |
| 1003 | int temp; |
| 1004 | |
| 1005 | /* |
| 1006 | * Unlinks could happen here; completion reporting |
| 1007 | * drops the lock. That's why ehci->qh_scan_next |
| 1008 | * always holds the next qh to scan; if the next qh |
| 1009 | * gets unlinked then ehci->qh_scan_next is adjusted |
| 1010 | * in qh_unlink_periodic(). |
| 1011 | */ |
| 1012 | temp = qh_completions(ehci, qh); |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 1013 | if (unlikely(temp)) |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 1014 | start_unlink_intr(ehci, qh); |
Ming Lei | 9118f9e | 2013-07-03 22:53:10 +0800 | [diff] [blame] | 1015 | else if (unlikely(list_empty(&qh->qtd_list) && |
| 1016 | qh->qh_state == QH_STATE_LINKED)) |
| 1017 | start_unlink_intr_wait(ehci, qh); |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 1018 | } |
| 1019 | } |
| 1020 | } |
| 1021 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | /*-------------------------------------------------------------------------*/ |
| 1023 | |
| 1024 | /* ehci_iso_stream ops work with both ITD and SITD */ |
| 1025 | |
| 1026 | static struct ehci_iso_stream * |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1027 | iso_stream_alloc(gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | { |
| 1029 | struct ehci_iso_stream *stream; |
| 1030 | |
Pekka Enberg | 7b842b6 | 2005-09-06 15:18:34 -0700 | [diff] [blame] | 1031 | stream = kzalloc(sizeof *stream, mem_flags); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1032 | if (likely(stream != NULL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | INIT_LIST_HEAD(&stream->td_list); |
| 1034 | INIT_LIST_HEAD(&stream->free_list); |
Alan Stern | 91a99b5 | 2013-10-11 11:28:52 -0400 | [diff] [blame] | 1035 | stream->next_uframe = NO_FRAME; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1036 | stream->ps.phase = NO_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | return stream; |
| 1039 | } |
| 1040 | |
| 1041 | static void |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1042 | iso_stream_init( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | struct ehci_hcd *ehci, |
| 1044 | struct ehci_iso_stream *stream, |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1045 | struct urb *urb |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | ) |
| 1047 | { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1048 | static const u8 smask_out[] = { 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1050 | struct usb_device *dev = urb->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | u32 buf1; |
| 1052 | unsigned epnum, maxp; |
| 1053 | int is_input; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1054 | unsigned tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
| 1056 | /* |
| 1057 | * this might be a "high bandwidth" highspeed endpoint, |
| 1058 | * as encoded in the ep descriptor's wMaxPacket field |
| 1059 | */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1060 | epnum = usb_pipeendpoint(urb->pipe); |
| 1061 | is_input = usb_pipein(urb->pipe) ? USB_DIR_IN : 0; |
| 1062 | maxp = usb_endpoint_maxp(&urb->ep->desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | if (is_input) { |
| 1064 | buf1 = (1 << 11); |
| 1065 | } else { |
| 1066 | buf1 = 0; |
| 1067 | } |
| 1068 | |
| 1069 | /* knows about ITD vs SITD */ |
| 1070 | if (dev->speed == USB_SPEED_HIGH) { |
| 1071 | unsigned multi = hb_mult(maxp); |
| 1072 | |
| 1073 | stream->highspeed = 1; |
| 1074 | |
| 1075 | maxp = max_packet(maxp); |
| 1076 | buf1 |= maxp; |
| 1077 | maxp *= multi; |
| 1078 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1079 | stream->buf0 = cpu_to_hc32(ehci, (epnum << 8) | dev->devnum); |
| 1080 | stream->buf1 = cpu_to_hc32(ehci, buf1); |
| 1081 | stream->buf2 = cpu_to_hc32(ehci, multi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
| 1083 | /* usbfs wants to report the average usecs per frame tied up |
| 1084 | * when transfers on this endpoint are scheduled ... |
| 1085 | */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1086 | stream->ps.usecs = HS_USECS_ISO(maxp); |
| 1087 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1088 | /* period for bandwidth allocation */ |
| 1089 | tmp = min_t(unsigned, EHCI_BANDWIDTH_SIZE, |
| 1090 | 1 << (urb->ep->desc.bInterval - 1)); |
| 1091 | |
| 1092 | /* Allow urb->interval to override */ |
| 1093 | stream->ps.bw_uperiod = min_t(unsigned, tmp, urb->interval); |
| 1094 | |
| 1095 | stream->uperiod = urb->interval; |
| 1096 | stream->ps.period = urb->interval >> 3; |
| 1097 | stream->bandwidth = stream->ps.usecs * 8 / |
| 1098 | stream->ps.bw_uperiod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
| 1100 | } else { |
| 1101 | u32 addr; |
david-b@pacbell.net | d038420 | 2005-08-13 18:44:58 -0700 | [diff] [blame] | 1102 | int think_time; |
Clemens Ladisch | 469d022 | 2006-01-20 13:49:10 -0800 | [diff] [blame] | 1103 | int hs_transfers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | addr = dev->ttport << 24; |
| 1106 | if (!ehci_is_TDI(ehci) |
| 1107 | || (dev->tt->hub != |
| 1108 | ehci_to_hcd(ehci)->self.root_hub)) |
| 1109 | addr |= dev->tt->hub->devnum << 16; |
| 1110 | addr |= epnum << 8; |
| 1111 | addr |= dev->devnum; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1112 | stream->ps.usecs = HS_USECS_ISO(maxp); |
david-b@pacbell.net | d038420 | 2005-08-13 18:44:58 -0700 | [diff] [blame] | 1113 | think_time = dev->tt ? dev->tt->think_time : 0; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1114 | stream->ps.tt_usecs = NS_TO_US(think_time + usb_calc_bus_time( |
david-b@pacbell.net | d038420 | 2005-08-13 18:44:58 -0700 | [diff] [blame] | 1115 | dev->speed, is_input, 1, maxp)); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1116 | hs_transfers = max(1u, (maxp + 187) / 188); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | if (is_input) { |
| 1118 | u32 tmp; |
| 1119 | |
| 1120 | addr |= 1 << 31; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1121 | stream->ps.c_usecs = stream->ps.usecs; |
| 1122 | stream->ps.usecs = HS_USECS_ISO(1); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1123 | stream->ps.cs_mask = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Clemens Ladisch | 469d022 | 2006-01-20 13:49:10 -0800 | [diff] [blame] | 1125 | /* c-mask as specified in USB 2.0 11.18.4 3.c */ |
| 1126 | tmp = (1 << (hs_transfers + 2)) - 1; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1127 | stream->ps.cs_mask |= tmp << (8 + 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | } else |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1129 | stream->ps.cs_mask = smask_out[hs_transfers - 1]; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1130 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1131 | /* period for bandwidth allocation */ |
| 1132 | tmp = min_t(unsigned, EHCI_BANDWIDTH_FRAMES, |
| 1133 | 1 << (urb->ep->desc.bInterval - 1)); |
| 1134 | |
| 1135 | /* Allow urb->interval to override */ |
| 1136 | stream->ps.bw_period = min_t(unsigned, tmp, urb->interval); |
| 1137 | stream->ps.bw_uperiod = stream->ps.bw_period << 3; |
| 1138 | |
| 1139 | stream->ps.period = urb->interval; |
| 1140 | stream->uperiod = urb->interval << 3; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1141 | stream->bandwidth = (stream->ps.usecs + stream->ps.c_usecs) / |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1142 | stream->ps.bw_period; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1144 | /* stream->splits gets created from cs_mask later */ |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1145 | stream->address = cpu_to_hc32(ehci, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1148 | stream->ps.udev = dev; |
| 1149 | stream->ps.ep = urb->ep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
| 1151 | stream->bEndpointAddress = is_input | epnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | stream->maxp = maxp; |
| 1153 | } |
| 1154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | static struct ehci_iso_stream * |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1156 | iso_stream_find(struct ehci_hcd *ehci, struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | { |
| 1158 | unsigned epnum; |
| 1159 | struct ehci_iso_stream *stream; |
| 1160 | struct usb_host_endpoint *ep; |
| 1161 | unsigned long flags; |
| 1162 | |
| 1163 | epnum = usb_pipeendpoint (urb->pipe); |
| 1164 | if (usb_pipein(urb->pipe)) |
| 1165 | ep = urb->dev->ep_in[epnum]; |
| 1166 | else |
| 1167 | ep = urb->dev->ep_out[epnum]; |
| 1168 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1169 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | stream = ep->hcpriv; |
| 1171 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1172 | if (unlikely(stream == NULL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | stream = iso_stream_alloc(GFP_ATOMIC); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1174 | if (likely(stream != NULL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | ep->hcpriv = stream; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1176 | iso_stream_init(ehci, stream, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
Clemens Ladisch | 1082f57 | 2010-03-01 17:18:56 +0100 | [diff] [blame] | 1179 | /* if dev->ep [epnum] is a QH, hw is set */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1180 | } else if (unlikely(stream->hw != NULL)) { |
| 1181 | ehci_dbg(ehci, "dev %s ep%d%s, not iso??\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | urb->dev->devpath, epnum, |
| 1183 | usb_pipein(urb->pipe) ? "in" : "out"); |
| 1184 | stream = NULL; |
| 1185 | } |
| 1186 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1187 | spin_unlock_irqrestore(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | return stream; |
| 1189 | } |
| 1190 | |
| 1191 | /*-------------------------------------------------------------------------*/ |
| 1192 | |
| 1193 | /* ehci_iso_sched ops can be ITD-only or SITD-only */ |
| 1194 | |
| 1195 | static struct ehci_iso_sched * |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1196 | iso_sched_alloc(unsigned packets, gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | { |
| 1198 | struct ehci_iso_sched *iso_sched; |
| 1199 | int size = sizeof *iso_sched; |
| 1200 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1201 | size += packets * sizeof(struct ehci_iso_packet); |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 1202 | iso_sched = kzalloc(size, mem_flags); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1203 | if (likely(iso_sched != NULL)) |
| 1204 | INIT_LIST_HEAD(&iso_sched->td_list); |
| 1205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | return iso_sched; |
| 1207 | } |
| 1208 | |
| 1209 | static inline void |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1210 | itd_sched_init( |
| 1211 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | struct ehci_iso_sched *iso_sched, |
| 1213 | struct ehci_iso_stream *stream, |
| 1214 | struct urb *urb |
| 1215 | ) |
| 1216 | { |
| 1217 | unsigned i; |
| 1218 | dma_addr_t dma = urb->transfer_dma; |
| 1219 | |
| 1220 | /* how many uframes are needed for these transfers */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1221 | iso_sched->span = urb->number_of_packets * stream->uperiod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | /* figure out per-uframe itd fields that we'll need later |
| 1224 | * when we fit new itds into the schedule. |
| 1225 | */ |
| 1226 | for (i = 0; i < urb->number_of_packets; i++) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1227 | struct ehci_iso_packet *uframe = &iso_sched->packet[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | unsigned length; |
| 1229 | dma_addr_t buf; |
| 1230 | u32 trans; |
| 1231 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1232 | length = urb->iso_frame_desc[i].length; |
| 1233 | buf = dma + urb->iso_frame_desc[i].offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
| 1235 | trans = EHCI_ISOC_ACTIVE; |
| 1236 | trans |= buf & 0x0fff; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1237 | if (unlikely(((i + 1) == urb->number_of_packets)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | && !(urb->transfer_flags & URB_NO_INTERRUPT)) |
| 1239 | trans |= EHCI_ITD_IOC; |
| 1240 | trans |= length << 16; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1241 | uframe->transaction = cpu_to_hc32(ehci, trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
David Brownell | 7707857 | 2005-05-28 10:46:18 -0700 | [diff] [blame] | 1243 | /* might need to cross a buffer page within a uframe */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | uframe->bufp = (buf & ~(u64)0x0fff); |
| 1245 | buf += length; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1246 | if (unlikely((uframe->bufp != (buf & ~(u64)0x0fff)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | uframe->cross = 1; |
| 1248 | } |
| 1249 | } |
| 1250 | |
| 1251 | static void |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1252 | iso_sched_free( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | struct ehci_iso_stream *stream, |
| 1254 | struct ehci_iso_sched *iso_sched |
| 1255 | ) |
| 1256 | { |
| 1257 | if (!iso_sched) |
| 1258 | return; |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 1259 | /* caller must hold ehci->lock! */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1260 | list_splice(&iso_sched->td_list, &stream->free_list); |
| 1261 | kfree(iso_sched); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | } |
| 1263 | |
| 1264 | static int |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1265 | itd_urb_transaction( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | struct ehci_iso_stream *stream, |
| 1267 | struct ehci_hcd *ehci, |
| 1268 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1269 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | ) |
| 1271 | { |
| 1272 | struct ehci_itd *itd; |
| 1273 | dma_addr_t itd_dma; |
| 1274 | int i; |
| 1275 | unsigned num_itds; |
| 1276 | struct ehci_iso_sched *sched; |
| 1277 | unsigned long flags; |
| 1278 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1279 | sched = iso_sched_alloc(urb->number_of_packets, mem_flags); |
| 1280 | if (unlikely(sched == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | return -ENOMEM; |
| 1282 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1283 | itd_sched_init(ehci, sched, stream, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | if (urb->interval < 8) |
| 1286 | num_itds = 1 + (sched->span + 7) / 8; |
| 1287 | else |
| 1288 | num_itds = urb->number_of_packets; |
| 1289 | |
| 1290 | /* allocate/init ITDs */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1291 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | for (i = 0; i < num_itds; i++) { |
| 1293 | |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1294 | /* |
| 1295 | * Use iTDs from the free list, but not iTDs that may |
| 1296 | * still be in use by the hardware. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | */ |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1298 | if (likely(!list_empty(&stream->free_list))) { |
| 1299 | itd = list_first_entry(&stream->free_list, |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1300 | struct ehci_itd, itd_list); |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 1301 | if (itd->frame == ehci->now_frame) |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1302 | goto alloc_itd; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1303 | list_del(&itd->itd_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | itd_dma = itd->itd_dma; |
Karsten Wiese | 3d01f0f | 2008-02-19 12:31:49 -0800 | [diff] [blame] | 1305 | } else { |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1306 | alloc_itd: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1307 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 1308 | itd = dma_pool_alloc(ehci->itd_pool, mem_flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | &itd_dma); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1310 | spin_lock_irqsave(&ehci->lock, flags); |
Karsten Wiese | 3d01f0f | 2008-02-19 12:31:49 -0800 | [diff] [blame] | 1311 | if (!itd) { |
| 1312 | iso_sched_free(stream, sched); |
| 1313 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 1314 | return -ENOMEM; |
| 1315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | } |
| 1317 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1318 | memset(itd, 0, sizeof *itd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | itd->itd_dma = itd_dma; |
Alan Stern | 91a99b5 | 2013-10-11 11:28:52 -0400 | [diff] [blame] | 1320 | itd->frame = NO_FRAME; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1321 | list_add(&itd->itd_list, &sched->td_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1323 | spin_unlock_irqrestore(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
| 1325 | /* temporarily store schedule info in hcpriv */ |
| 1326 | urb->hcpriv = sched; |
| 1327 | urb->error_count = 0; |
| 1328 | return 0; |
| 1329 | } |
| 1330 | |
| 1331 | /*-------------------------------------------------------------------------*/ |
| 1332 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1333 | static void reserve_release_iso_bandwidth(struct ehci_hcd *ehci, |
| 1334 | struct ehci_iso_stream *stream, int sign) |
| 1335 | { |
| 1336 | unsigned uframe; |
| 1337 | unsigned i, j; |
| 1338 | unsigned s_mask, c_mask, m; |
| 1339 | int usecs = stream->ps.usecs; |
| 1340 | int c_usecs = stream->ps.c_usecs; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1341 | int tt_usecs = stream->ps.tt_usecs; |
| 1342 | struct ehci_tt *tt; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1343 | |
| 1344 | if (stream->ps.phase == NO_FRAME) /* Bandwidth wasn't reserved */ |
| 1345 | return; |
| 1346 | uframe = stream->ps.bw_phase << 3; |
| 1347 | |
| 1348 | bandwidth_dbg(ehci, sign, "iso", &stream->ps); |
| 1349 | |
| 1350 | if (sign < 0) { /* Release bandwidth */ |
| 1351 | usecs = -usecs; |
| 1352 | c_usecs = -c_usecs; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1353 | tt_usecs = -tt_usecs; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1354 | } |
| 1355 | |
| 1356 | if (!stream->splits) { /* High speed */ |
| 1357 | for (i = uframe + stream->ps.phase_uf; i < EHCI_BANDWIDTH_SIZE; |
| 1358 | i += stream->ps.bw_uperiod) |
| 1359 | ehci->bandwidth[i] += usecs; |
| 1360 | |
| 1361 | } else { /* Full speed */ |
| 1362 | s_mask = stream->ps.cs_mask; |
| 1363 | c_mask = s_mask >> 8; |
| 1364 | |
| 1365 | /* NOTE: adjustment needed for frame overflow */ |
| 1366 | for (i = uframe; i < EHCI_BANDWIDTH_SIZE; |
| 1367 | i += stream->ps.bw_uperiod) { |
| 1368 | for ((j = stream->ps.phase_uf, m = 1 << j); j < 8; |
| 1369 | (++j, m <<= 1)) { |
| 1370 | if (s_mask & m) |
| 1371 | ehci->bandwidth[i+j] += usecs; |
| 1372 | else if (c_mask & m) |
| 1373 | ehci->bandwidth[i+j] += c_usecs; |
| 1374 | } |
| 1375 | } |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1376 | |
| 1377 | tt = find_tt(stream->ps.udev); |
| 1378 | if (sign > 0) |
| 1379 | list_add_tail(&stream->ps.ps_list, &tt->ps_list); |
| 1380 | else |
| 1381 | list_del(&stream->ps.ps_list); |
| 1382 | |
| 1383 | for (i = uframe >> 3; i < EHCI_BANDWIDTH_FRAMES; |
| 1384 | i += stream->ps.bw_period) |
| 1385 | tt->bandwidth[i] += tt_usecs; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1386 | } |
| 1387 | } |
| 1388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | static inline int |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1390 | itd_slot_ok( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | struct ehci_hcd *ehci, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1392 | struct ehci_iso_stream *stream, |
| 1393 | unsigned uframe |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | ) |
| 1395 | { |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1396 | unsigned usecs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1398 | /* convert "usecs we need" to "max already claimed" */ |
| 1399 | usecs = ehci->uframe_periodic_max - stream->ps.usecs; |
| 1400 | |
| 1401 | for (uframe &= stream->ps.bw_uperiod - 1; uframe < EHCI_BANDWIDTH_SIZE; |
| 1402 | uframe += stream->ps.bw_uperiod) { |
| 1403 | if (ehci->bandwidth[uframe] > usecs) |
| 1404 | return 0; |
| 1405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | return 1; |
| 1407 | } |
| 1408 | |
| 1409 | static inline int |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1410 | sitd_slot_ok( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | struct ehci_iso_stream *stream, |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1413 | unsigned uframe, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1414 | struct ehci_iso_sched *sched, |
| 1415 | struct ehci_tt *tt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | ) |
| 1417 | { |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1418 | unsigned mask, tmp; |
| 1419 | unsigned frame, uf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1421 | mask = stream->ps.cs_mask << (uframe & 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | |
Alan Stern | 8c05dc5 | 2013-10-11 11:28:31 -0400 | [diff] [blame] | 1423 | /* for OUT, don't wrap SSPLIT into H-microframe 7 */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1424 | if (((stream->ps.cs_mask & 0xff) << (uframe & 7)) >= (1 << 7)) |
Alan Stern | 8c05dc5 | 2013-10-11 11:28:31 -0400 | [diff] [blame] | 1425 | return 0; |
| 1426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | /* for IN, don't wrap CSPLIT into the next frame */ |
| 1428 | if (mask & ~0xffff) |
| 1429 | return 0; |
| 1430 | |
Alan Stern | 65b8e5c | 2012-05-14 13:47:20 -0400 | [diff] [blame] | 1431 | /* check bandwidth */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1432 | uframe &= stream->ps.bw_uperiod - 1; |
Alan Stern | 65b8e5c | 2012-05-14 13:47:20 -0400 | [diff] [blame] | 1433 | frame = uframe >> 3; |
| 1434 | |
| 1435 | #ifdef CONFIG_USB_EHCI_TT_NEWSCHED |
| 1436 | /* The tt's fullspeed bus bandwidth must be available. |
| 1437 | * tt_available scheduling guarantees 10+% for control/bulk. |
| 1438 | */ |
| 1439 | uf = uframe & 7; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1440 | if (!tt_available(ehci, &stream->ps, tt, frame, uf)) |
Alan Stern | 65b8e5c | 2012-05-14 13:47:20 -0400 | [diff] [blame] | 1441 | return 0; |
| 1442 | #else |
| 1443 | /* tt must be idle for start(s), any gap, and csplit. |
| 1444 | * assume scheduling slop leaves 10+% for control/bulk. |
| 1445 | */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1446 | if (!tt_no_collision(ehci, stream->ps.bw_period, |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1447 | stream->ps.udev, frame, mask)) |
Alan Stern | 65b8e5c | 2012-05-14 13:47:20 -0400 | [diff] [blame] | 1448 | return 0; |
| 1449 | #endif |
| 1450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | do { |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1452 | unsigned max_used; |
| 1453 | unsigned i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | /* check starts (OUT uses more than one) */ |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1456 | uf = uframe; |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1457 | max_used = ehci->uframe_periodic_max - stream->ps.usecs; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1458 | for (tmp = stream->ps.cs_mask & 0xff; tmp; tmp >>= 1, uf++) { |
| 1459 | if (ehci->bandwidth[uf] > max_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | return 0; |
| 1461 | } |
| 1462 | |
| 1463 | /* for IN, check CSPLIT */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1464 | if (stream->ps.c_usecs) { |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1465 | max_used = ehci->uframe_periodic_max - |
| 1466 | stream->ps.c_usecs; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1467 | uf = uframe & ~7; |
| 1468 | tmp = 1 << (2+8); |
| 1469 | for (i = (uframe & 7) + 2; i < 8; (++i, tmp <<= 1)) { |
| 1470 | if ((stream->ps.cs_mask & tmp) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | continue; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1472 | if (ehci->bandwidth[uf+i] > max_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | return 0; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1474 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | } |
| 1476 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1477 | uframe += stream->ps.bw_uperiod; |
| 1478 | } while (uframe < EHCI_BANDWIDTH_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1480 | stream->ps.cs_mask <<= uframe & 7; |
| 1481 | stream->splits = cpu_to_hc32(ehci, stream->ps.cs_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | return 1; |
| 1483 | } |
| 1484 | |
| 1485 | /* |
| 1486 | * This scheduler plans almost as far into the future as it has actual |
| 1487 | * periodic schedule slots. (Affected by TUNE_FLS, which defaults to |
| 1488 | * "as small as possible" to be cache-friendlier.) That limits the size |
| 1489 | * transfers you can stream reliably; avoid more than 64 msec per urb. |
| 1490 | * Also avoid queue depths of less than ehci's worst irq latency (affected |
| 1491 | * by the per-urb URB_NO_INTERRUPT hint, the log2_irq_thresh module parameter, |
| 1492 | * and other factors); or more than about 230 msec total (for portability, |
| 1493 | * given EHCI_TUNE_FLS and the slop). Or, write a smarter scheduler! |
| 1494 | */ |
| 1495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | static int |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1497 | iso_stream_schedule( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | struct ehci_hcd *ehci, |
| 1499 | struct urb *urb, |
| 1500 | struct ehci_iso_stream *stream |
| 1501 | ) |
| 1502 | { |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1503 | u32 now, base, next, start, period, span, now2; |
| 1504 | u32 wrap = 0, skip = 0; |
| 1505 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | unsigned mod = ehci->periodic_size << 3; |
| 1507 | struct ehci_iso_sched *sched = urb->hcpriv; |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1508 | bool empty = list_empty(&stream->td_list); |
Alan Stern | a393a80 | 2013-10-11 11:29:36 -0400 | [diff] [blame] | 1509 | bool new_stream = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1511 | period = stream->uperiod; |
Alan Stern | ffda080 | 2010-07-14 11:03:46 -0400 | [diff] [blame] | 1512 | span = sched->span; |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1513 | if (!stream->highspeed) |
Alan Stern | ffda080 | 2010-07-14 11:03:46 -0400 | [diff] [blame] | 1514 | span <<= 3; |
Alan Stern | ffda080 | 2010-07-14 11:03:46 -0400 | [diff] [blame] | 1515 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1516 | /* Start a new isochronous stream? */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1517 | if (unlikely(empty && !hcd_periodic_completion_in_progress( |
| 1518 | ehci_to_hcd(ehci), urb->ep))) { |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1519 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1520 | /* Schedule the endpoint */ |
| 1521 | if (stream->ps.phase == NO_FRAME) { |
| 1522 | int done = 0; |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1523 | struct ehci_tt *tt = find_tt(stream->ps.udev); |
| 1524 | |
| 1525 | if (IS_ERR(tt)) { |
| 1526 | status = PTR_ERR(tt); |
| 1527 | goto fail; |
| 1528 | } |
| 1529 | compute_tt_budget(ehci->tt_budget, tt); |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1530 | |
Alan Stern | a393a80 | 2013-10-11 11:29:36 -0400 | [diff] [blame] | 1531 | start = ((-(++ehci->random_frame)) << 3) & (period - 1); |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1532 | |
| 1533 | /* find a uframe slot with enough bandwidth. |
| 1534 | * Early uframes are more precious because full-speed |
| 1535 | * iso IN transfers can't use late uframes, |
| 1536 | * and therefore they should be allocated last. |
| 1537 | */ |
| 1538 | next = start; |
| 1539 | start += period; |
| 1540 | do { |
| 1541 | start--; |
| 1542 | /* check schedule: enough space? */ |
| 1543 | if (stream->highspeed) { |
| 1544 | if (itd_slot_ok(ehci, stream, start)) |
| 1545 | done = 1; |
| 1546 | } else { |
| 1547 | if ((start % 8) >= 6) |
| 1548 | continue; |
| 1549 | if (sitd_slot_ok(ehci, stream, start, |
Alan Stern | b35c500 | 2013-10-11 22:16:21 -0400 | [diff] [blame] | 1550 | sched, tt)) |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1551 | done = 1; |
| 1552 | } |
| 1553 | } while (start > next && !done); |
| 1554 | |
| 1555 | /* no room in the schedule */ |
| 1556 | if (!done) { |
| 1557 | ehci_dbg(ehci, "iso sched full %p", urb); |
| 1558 | status = -ENOSPC; |
| 1559 | goto fail; |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1560 | } |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1561 | stream->ps.phase = (start >> 3) & |
| 1562 | (stream->ps.period - 1); |
| 1563 | stream->ps.bw_phase = stream->ps.phase & |
| 1564 | (stream->ps.bw_period - 1); |
| 1565 | stream->ps.phase_uf = start & 7; |
| 1566 | reserve_release_iso_bandwidth(ehci, stream, 1); |
| 1567 | } |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1568 | |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1569 | /* New stream is already scheduled; use the upcoming slot */ |
| 1570 | else { |
| 1571 | start = (stream->ps.phase << 3) + stream->ps.phase_uf; |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1572 | } |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1573 | |
Alan Stern | a393a80 | 2013-10-11 11:29:36 -0400 | [diff] [blame] | 1574 | stream->next_uframe = start; |
| 1575 | new_stream = true; |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1576 | } |
| 1577 | |
Alan Stern | a393a80 | 2013-10-11 11:29:36 -0400 | [diff] [blame] | 1578 | now = ehci_read_frame_index(ehci) & (mod - 1); |
| 1579 | |
| 1580 | /* Take the isochronous scheduling threshold into account */ |
| 1581 | if (ehci->i_thresh) |
| 1582 | next = now + ehci->i_thresh; /* uframe cache */ |
| 1583 | else |
| 1584 | next = (now + 2 + 7) & ~0x07; /* full frame cache */ |
| 1585 | |
Alan Stern | 6d89252 | 2014-12-04 10:21:56 -0500 | [diff] [blame] | 1586 | /* If needed, initialize last_iso_frame so that this URB will be seen */ |
| 1587 | if (ehci->isoc_count == 0) |
| 1588 | ehci->last_iso_frame = now >> 3; |
| 1589 | |
Alan Stern | a393a80 | 2013-10-11 11:29:36 -0400 | [diff] [blame] | 1590 | /* |
| 1591 | * Use ehci->last_iso_frame as the base. There can't be any |
| 1592 | * TDs scheduled for earlier than that. |
| 1593 | */ |
| 1594 | base = ehci->last_iso_frame << 3; |
| 1595 | next = (next - base) & (mod - 1); |
| 1596 | start = (stream->next_uframe - base) & (mod - 1); |
| 1597 | |
| 1598 | if (unlikely(new_stream)) |
| 1599 | goto do_ASAP; |
| 1600 | |
Alan Stern | e4e18cb | 2013-09-03 13:58:59 -0400 | [diff] [blame] | 1601 | /* |
Alan Stern | d0ce5c6 | 2013-10-11 11:29:13 -0400 | [diff] [blame] | 1602 | * Typical case: reuse current schedule, stream may still be active. |
Alan Stern | b40e43f | 2008-05-20 16:59:10 -0400 | [diff] [blame] | 1603 | * Hopefully there are no gaps from the host falling behind |
Alan Stern | 4005ad4 | 2012-10-01 10:32:01 -0400 | [diff] [blame] | 1604 | * (irq delays etc). If there are, the behavior depends on |
| 1605 | * whether URB_ISO_ASAP is set. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1607 | now2 = (now - base) & (mod - 1); |
Sarah Sharp | dccd574 | 2009-10-27 10:55:05 -0700 | [diff] [blame] | 1608 | |
Alan Stern | c401e7b | 2014-12-04 10:22:57 -0500 | [diff] [blame] | 1609 | /* Is the schedule about to wrap around? */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1610 | if (unlikely(!empty && start < period)) { |
Alan Stern | c401e7b | 2014-12-04 10:22:57 -0500 | [diff] [blame] | 1611 | ehci_dbg(ehci, "request %p would overflow (%u-%u < %u mod %u)\n", |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1612 | urb, stream->next_uframe, base, period, mod); |
Alan Stern | c401e7b | 2014-12-04 10:22:57 -0500 | [diff] [blame] | 1613 | status = -EFBIG; |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1614 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | } |
| 1616 | |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1617 | /* Is the next packet scheduled after the base time? */ |
| 1618 | if (likely(!empty || start <= now2 + period)) { |
| 1619 | |
| 1620 | /* URB_ISO_ASAP: make sure that start >= next */ |
| 1621 | if (unlikely(start < next && |
| 1622 | (urb->transfer_flags & URB_ISO_ASAP))) |
| 1623 | goto do_ASAP; |
| 1624 | |
| 1625 | /* Otherwise use start, if it's not in the past */ |
| 1626 | if (likely(start >= now2)) |
| 1627 | goto use_start; |
| 1628 | |
| 1629 | /* Otherwise we got an underrun while the queue was empty */ |
| 1630 | } else { |
| 1631 | if (urb->transfer_flags & URB_ISO_ASAP) |
| 1632 | goto do_ASAP; |
| 1633 | wrap = mod; |
| 1634 | now2 += mod; |
| 1635 | } |
| 1636 | |
| 1637 | /* How many uframes and packets do we need to skip? */ |
| 1638 | skip = (now2 - start + period - 1) & -period; |
| 1639 | if (skip >= span) { /* Entirely in the past? */ |
| 1640 | ehci_dbg(ehci, "iso underrun %p (%u+%u < %u) [%u]\n", |
| 1641 | urb, start + base, span - period, now2 + base, |
| 1642 | base); |
| 1643 | |
| 1644 | /* Try to keep the last TD intact for scanning later */ |
| 1645 | skip = span - period; |
| 1646 | |
| 1647 | /* Will it come before the current scan position? */ |
| 1648 | if (empty) { |
| 1649 | skip = span; /* Skip the entire URB */ |
| 1650 | status = 1; /* and give it back immediately */ |
| 1651 | iso_sched_free(stream, sched); |
| 1652 | sched = NULL; |
| 1653 | } |
| 1654 | } |
| 1655 | urb->error_count = skip / period; |
| 1656 | if (sched) |
| 1657 | sched->first_packet = urb->error_count; |
| 1658 | goto use_start; |
| 1659 | |
| 1660 | do_ASAP: |
| 1661 | /* Use the first slot after "next" */ |
| 1662 | start = next + ((start - next) & (period - 1)); |
| 1663 | |
| 1664 | use_start: |
Alan Stern | 1fb2e05 | 2010-07-14 11:03:53 -0400 | [diff] [blame] | 1665 | /* Tried to schedule too far into the future? */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1666 | if (unlikely(start + span - period >= mod + wrap)) { |
Alan Stern | c3ee9b7 | 2012-09-28 16:01:23 -0400 | [diff] [blame] | 1667 | ehci_dbg(ehci, "request %p would overflow (%u+%u >= %u)\n", |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1668 | urb, start, span - period, mod + wrap); |
Alan Stern | 1fb2e05 | 2010-07-14 11:03:53 -0400 | [diff] [blame] | 1669 | status = -EFBIG; |
| 1670 | goto fail; |
| 1671 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1673 | start += base; |
| 1674 | stream->next_uframe = (start + skip) & (mod - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | /* report high speed start in uframes; full speed, in frames */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1677 | urb->start_frame = start & (mod - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | if (!stream->highspeed) |
| 1679 | urb->start_frame >>= 3; |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1680 | return status; |
Alan Stern | 1fb2e05 | 2010-07-14 11:03:53 -0400 | [diff] [blame] | 1681 | |
| 1682 | fail: |
| 1683 | iso_sched_free(stream, sched); |
| 1684 | urb->hcpriv = NULL; |
| 1685 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | } |
| 1687 | |
| 1688 | /*-------------------------------------------------------------------------*/ |
| 1689 | |
| 1690 | static inline void |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1691 | itd_init(struct ehci_hcd *ehci, struct ehci_iso_stream *stream, |
| 1692 | struct ehci_itd *itd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | { |
| 1694 | int i; |
| 1695 | |
David Brownell | 7707857 | 2005-05-28 10:46:18 -0700 | [diff] [blame] | 1696 | /* it's been recently zeroed */ |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1697 | itd->hw_next = EHCI_LIST_END(ehci); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1698 | itd->hw_bufp[0] = stream->buf0; |
| 1699 | itd->hw_bufp[1] = stream->buf1; |
| 1700 | itd->hw_bufp[2] = stream->buf2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
| 1702 | for (i = 0; i < 8; i++) |
| 1703 | itd->index[i] = -1; |
| 1704 | |
| 1705 | /* All other fields are filled when scheduling */ |
| 1706 | } |
| 1707 | |
| 1708 | static inline void |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1709 | itd_patch( |
| 1710 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | struct ehci_itd *itd, |
| 1712 | struct ehci_iso_sched *iso_sched, |
| 1713 | unsigned index, |
David Brownell | 7707857 | 2005-05-28 10:46:18 -0700 | [diff] [blame] | 1714 | u16 uframe |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | ) |
| 1716 | { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1717 | struct ehci_iso_packet *uf = &iso_sched->packet[index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | unsigned pg = itd->pg; |
| 1719 | |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 1720 | /* BUG_ON(pg == 6 && uf->cross); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | |
| 1722 | uframe &= 0x07; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1723 | itd->index[uframe] = index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1725 | itd->hw_transaction[uframe] = uf->transaction; |
| 1726 | itd->hw_transaction[uframe] |= cpu_to_hc32(ehci, pg << 12); |
| 1727 | itd->hw_bufp[pg] |= cpu_to_hc32(ehci, uf->bufp & ~(u32)0); |
| 1728 | itd->hw_bufp_hi[pg] |= cpu_to_hc32(ehci, (u32)(uf->bufp >> 32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | |
| 1730 | /* iso_frame_desc[].offset must be strictly increasing */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1731 | if (unlikely(uf->cross)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | u64 bufp = uf->bufp + 4096; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | itd->pg = ++pg; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1735 | itd->hw_bufp[pg] |= cpu_to_hc32(ehci, bufp & ~(u32)0); |
| 1736 | itd->hw_bufp_hi[pg] |= cpu_to_hc32(ehci, (u32)(bufp >> 32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | } |
| 1738 | } |
| 1739 | |
| 1740 | static inline void |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1741 | itd_link(struct ehci_hcd *ehci, unsigned frame, struct ehci_itd *itd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | { |
Clemens Ladisch | 92bc364 | 2010-03-01 09:12:50 +0100 | [diff] [blame] | 1743 | union ehci_shadow *prev = &ehci->pshadow[frame]; |
| 1744 | __hc32 *hw_p = &ehci->periodic[frame]; |
| 1745 | union ehci_shadow here = *prev; |
| 1746 | __hc32 type = 0; |
| 1747 | |
| 1748 | /* skip any iso nodes which might belong to previous microframes */ |
| 1749 | while (here.ptr) { |
| 1750 | type = Q_NEXT_TYPE(ehci, *hw_p); |
| 1751 | if (type == cpu_to_hc32(ehci, Q_TYPE_QH)) |
| 1752 | break; |
| 1753 | prev = periodic_next_shadow(ehci, prev, type); |
| 1754 | hw_p = shadow_next_periodic(ehci, &here, type); |
| 1755 | here = *prev; |
| 1756 | } |
| 1757 | |
| 1758 | itd->itd_next = here; |
| 1759 | itd->hw_next = *hw_p; |
| 1760 | prev->itd = itd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | itd->frame = frame; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1762 | wmb(); |
Clemens Ladisch | 92bc364 | 2010-03-01 09:12:50 +0100 | [diff] [blame] | 1763 | *hw_p = cpu_to_hc32(ehci, itd->itd_dma | Q_TYPE_ITD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | } |
| 1765 | |
| 1766 | /* fit urb's itds into the selected schedule slot; activate as needed */ |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 1767 | static void itd_link_urb( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | struct ehci_hcd *ehci, |
| 1769 | struct urb *urb, |
| 1770 | unsigned mod, |
| 1771 | struct ehci_iso_stream *stream |
| 1772 | ) |
| 1773 | { |
David Brownell | 7707857 | 2005-05-28 10:46:18 -0700 | [diff] [blame] | 1774 | int packet; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | unsigned next_uframe, uframe, frame; |
| 1776 | struct ehci_iso_sched *iso_sched = urb->hcpriv; |
| 1777 | struct ehci_itd *itd; |
| 1778 | |
Alan Stern | bccbefa | 2010-07-14 11:03:36 -0400 | [diff] [blame] | 1779 | next_uframe = stream->next_uframe & (mod - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1781 | if (unlikely(list_empty(&stream->td_list))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | ehci_to_hcd(ehci)->self.bandwidth_allocated |
| 1783 | += stream->bandwidth; |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 1784 | |
| 1785 | if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) { |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 1786 | if (ehci->amd_pll_fix == 1) |
| 1787 | usb_amd_quirk_pll_disable(); |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 1788 | } |
| 1789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs++; |
| 1791 | |
| 1792 | /* fill iTDs uframe by uframe */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1793 | for (packet = iso_sched->first_packet, itd = NULL; |
| 1794 | packet < urb->number_of_packets;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | if (itd == NULL) { |
| 1796 | /* ASSERT: we have all necessary itds */ |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 1797 | /* BUG_ON(list_empty(&iso_sched->td_list)); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | |
| 1799 | /* ASSERT: no itds for this endpoint in this uframe */ |
| 1800 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1801 | itd = list_entry(iso_sched->td_list.next, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | struct ehci_itd, itd_list); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1803 | list_move_tail(&itd->itd_list, &stream->td_list); |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 1804 | itd->stream = stream; |
Karsten Wiese | 508db8c | 2009-02-26 01:47:48 +0100 | [diff] [blame] | 1805 | itd->urb = urb; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1806 | itd_init(ehci, stream, itd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | } |
| 1808 | |
| 1809 | uframe = next_uframe & 0x07; |
| 1810 | frame = next_uframe >> 3; |
| 1811 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 1812 | itd_patch(ehci, itd, iso_sched, packet, uframe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1814 | next_uframe += stream->uperiod; |
Alan Stern | bccbefa | 2010-07-14 11:03:36 -0400 | [diff] [blame] | 1815 | next_uframe &= mod - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | packet++; |
| 1817 | |
| 1818 | /* link completed itds into the schedule */ |
| 1819 | if (((next_uframe >> 3) != frame) |
| 1820 | || packet == urb->number_of_packets) { |
Alan Stern | bccbefa | 2010-07-14 11:03:36 -0400 | [diff] [blame] | 1821 | itd_link(ehci, frame & (ehci->periodic_size - 1), itd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | itd = NULL; |
| 1823 | } |
| 1824 | } |
| 1825 | stream->next_uframe = next_uframe; |
| 1826 | |
| 1827 | /* don't need that schedule data any more */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1828 | iso_sched_free(stream, iso_sched); |
Alan Stern | 2656a9a | 2012-11-08 10:17:01 -0500 | [diff] [blame] | 1829 | urb->hcpriv = stream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 1831 | ++ehci->isoc_count; |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 1832 | enable_periodic(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | } |
| 1834 | |
| 1835 | #define ISO_ERRS (EHCI_ISOC_BUF_ERR | EHCI_ISOC_BABBLE | EHCI_ISOC_XACTERR) |
| 1836 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1837 | /* Process and recycle a completed ITD. Return true iff its urb completed, |
| 1838 | * and hence its completion callback probably added things to the hardware |
| 1839 | * schedule. |
| 1840 | * |
| 1841 | * Note that we carefully avoid recycling this descriptor until after any |
| 1842 | * completion callback runs, so that it won't be reused quickly. That is, |
| 1843 | * assuming (a) no more than two urbs per frame on this endpoint, and also |
| 1844 | * (b) only this endpoint's completions submit URBs. It seems some silicon |
| 1845 | * corrupts things if you reuse completed descriptors very quickly... |
| 1846 | */ |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 1847 | static bool itd_complete(struct ehci_hcd *ehci, struct ehci_itd *itd) |
| 1848 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | struct urb *urb = itd->urb; |
| 1850 | struct usb_iso_packet_descriptor *desc; |
| 1851 | u32 t; |
| 1852 | unsigned uframe; |
| 1853 | int urb_index = -1; |
| 1854 | struct ehci_iso_stream *stream = itd->stream; |
| 1855 | struct usb_device *dev; |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 1856 | bool retval = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
| 1858 | /* for each uframe with a packet */ |
| 1859 | for (uframe = 0; uframe < 8; uframe++) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1860 | if (likely(itd->index[uframe] == -1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | continue; |
| 1862 | urb_index = itd->index[uframe]; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1863 | desc = &urb->iso_frame_desc[urb_index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1865 | t = hc32_to_cpup(ehci, &itd->hw_transaction[uframe]); |
| 1866 | itd->hw_transaction[uframe] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | |
| 1868 | /* report transfer status */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1869 | if (unlikely(t & ISO_ERRS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | urb->error_count++; |
| 1871 | if (t & EHCI_ISOC_BUF_ERR) |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1872 | desc->status = usb_pipein(urb->pipe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | ? -ENOSR /* hc couldn't read */ |
| 1874 | : -ECOMM; /* hc couldn't write */ |
| 1875 | else if (t & EHCI_ISOC_BABBLE) |
| 1876 | desc->status = -EOVERFLOW; |
| 1877 | else /* (t & EHCI_ISOC_XACTERR) */ |
| 1878 | desc->status = -EPROTO; |
| 1879 | |
| 1880 | /* HC need not update length with this error */ |
Alan Stern | ec6d67e | 2009-06-29 14:34:59 -0400 | [diff] [blame] | 1881 | if (!(t & EHCI_ISOC_BABBLE)) { |
| 1882 | desc->actual_length = EHCI_ITD_LENGTH(t); |
| 1883 | urb->actual_length += desc->actual_length; |
| 1884 | } |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1885 | } else if (likely((t & EHCI_ISOC_ACTIVE) == 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | desc->status = 0; |
Alan Stern | ec6d67e | 2009-06-29 14:34:59 -0400 | [diff] [blame] | 1887 | desc->actual_length = EHCI_ITD_LENGTH(t); |
| 1888 | urb->actual_length += desc->actual_length; |
Alan Stern | b40e43f | 2008-05-20 16:59:10 -0400 | [diff] [blame] | 1889 | } else { |
| 1890 | /* URB was too late */ |
Alan Stern | 4005ad4 | 2012-10-01 10:32:01 -0400 | [diff] [blame] | 1891 | urb->error_count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | } |
| 1893 | } |
| 1894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | /* handle completion now? */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1896 | if (likely((urb_index + 1) != urb->number_of_packets)) |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1897 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 1899 | /* |
| 1900 | * ASSERT: it's really the last itd for this urb |
| 1901 | * list_for_each_entry (itd, &stream->td_list, itd_list) |
| 1902 | * BUG_ON(itd->urb == urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | */ |
| 1904 | |
David Brownell | aa16ca3 | 2007-12-30 23:45:19 -0800 | [diff] [blame] | 1905 | /* give urb back to the driver; completion often (re)submits */ |
Alan Stern | 6a8e87b | 2006-01-19 10:46:27 -0500 | [diff] [blame] | 1906 | dev = urb->dev; |
Alan Stern | 14c04c0 | 2007-08-24 15:40:19 -0400 | [diff] [blame] | 1907 | ehci_urb_done(ehci, urb, 0); |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1908 | retval = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | urb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 1911 | --ehci->isoc_count; |
| 1912 | disable_periodic(ehci); |
| 1913 | |
| 1914 | ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs--; |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 1915 | if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) { |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 1916 | if (ehci->amd_pll_fix == 1) |
| 1917 | usb_amd_quirk_pll_enable(); |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 1918 | } |
| 1919 | |
Xenia Ragiadakou | fea26ef | 2013-08-29 11:45:10 +0300 | [diff] [blame] | 1920 | if (unlikely(list_is_singular(&stream->td_list))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | ehci_to_hcd(ehci)->self.bandwidth_allocated |
| 1922 | -= stream->bandwidth; |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 1923 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1924 | done: |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1925 | itd->urb = NULL; |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1926 | |
| 1927 | /* Add to the end of the free list for later reuse */ |
| 1928 | list_move_tail(&itd->itd_list, &stream->free_list); |
| 1929 | |
| 1930 | /* Recycle the iTDs when the pipeline is empty (ep no longer in use) */ |
| 1931 | if (list_empty(&stream->td_list)) { |
| 1932 | list_splice_tail_init(&stream->free_list, |
| 1933 | &ehci->cached_itd_list); |
| 1934 | start_free_itds(ehci); |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 1935 | } |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 1936 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 1937 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | } |
| 1939 | |
| 1940 | /*-------------------------------------------------------------------------*/ |
| 1941 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1942 | static int itd_submit(struct ehci_hcd *ehci, struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 1943 | gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | { |
| 1945 | int status = -EINVAL; |
| 1946 | unsigned long flags; |
| 1947 | struct ehci_iso_stream *stream; |
| 1948 | |
| 1949 | /* Get iso_stream head */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1950 | stream = iso_stream_find(ehci, urb); |
| 1951 | if (unlikely(stream == NULL)) { |
| 1952 | ehci_dbg(ehci, "can't get iso stream\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | return -ENOMEM; |
| 1954 | } |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1955 | if (unlikely(urb->interval != stream->uperiod)) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1956 | ehci_dbg(ehci, "can't change iso interval %d --> %d\n", |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 1957 | stream->uperiod, urb->interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | goto done; |
| 1959 | } |
| 1960 | |
| 1961 | #ifdef EHCI_URB_TRACE |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1962 | ehci_dbg(ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | "%s %s urb %p ep%d%s len %d, %d pkts %d uframes [%p]\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1964 | __func__, urb->dev->devpath, urb, |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1965 | usb_pipeendpoint(urb->pipe), |
| 1966 | usb_pipein(urb->pipe) ? "in" : "out", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | urb->transfer_buffer_length, |
| 1968 | urb->number_of_packets, urb->interval, |
| 1969 | stream); |
| 1970 | #endif |
| 1971 | |
| 1972 | /* allocate ITDs w/o locking anything */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1973 | status = itd_urb_transaction(stream, ehci, urb, mem_flags); |
| 1974 | if (unlikely(status < 0)) { |
| 1975 | ehci_dbg(ehci, "can't init itds\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | goto done; |
| 1977 | } |
| 1978 | |
| 1979 | /* schedule ... need to lock */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1980 | spin_lock_irqsave(&ehci->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 1981 | if (unlikely(!HCD_HW_ACCESSIBLE(ehci_to_hcd(ehci)))) { |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 1982 | status = -ESHUTDOWN; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1983 | goto done_not_linked; |
| 1984 | } |
| 1985 | status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb); |
| 1986 | if (unlikely(status)) |
| 1987 | goto done_not_linked; |
| 1988 | status = iso_stream_schedule(ehci, urb, stream); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1989 | if (likely(status == 0)) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1990 | itd_link_urb(ehci, urb, ehci->periodic_size << 3, stream); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1991 | } else if (status > 0) { |
| 1992 | status = 0; |
| 1993 | ehci_urb_done(ehci, urb, 0); |
| 1994 | } else { |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1995 | usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 1996 | } |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 1997 | done_not_linked: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 1998 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 1999 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | return status; |
| 2001 | } |
| 2002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | /*-------------------------------------------------------------------------*/ |
| 2004 | |
| 2005 | /* |
| 2006 | * "Split ISO TDs" ... used for USB 1.1 devices going through the |
| 2007 | * TTs in USB 2.0 hubs. These need microframe scheduling. |
| 2008 | */ |
| 2009 | |
| 2010 | static inline void |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2011 | sitd_sched_init( |
| 2012 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | struct ehci_iso_sched *iso_sched, |
| 2014 | struct ehci_iso_stream *stream, |
| 2015 | struct urb *urb |
| 2016 | ) |
| 2017 | { |
| 2018 | unsigned i; |
| 2019 | dma_addr_t dma = urb->transfer_dma; |
| 2020 | |
| 2021 | /* how many frames are needed for these transfers */ |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 2022 | iso_sched->span = urb->number_of_packets * stream->ps.period; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | |
| 2024 | /* figure out per-frame sitd fields that we'll need later |
| 2025 | * when we fit new sitds into the schedule. |
| 2026 | */ |
| 2027 | for (i = 0; i < urb->number_of_packets; i++) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2028 | struct ehci_iso_packet *packet = &iso_sched->packet[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | unsigned length; |
| 2030 | dma_addr_t buf; |
| 2031 | u32 trans; |
| 2032 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2033 | length = urb->iso_frame_desc[i].length & 0x03ff; |
| 2034 | buf = dma + urb->iso_frame_desc[i].offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2035 | |
| 2036 | trans = SITD_STS_ACTIVE; |
| 2037 | if (((i + 1) == urb->number_of_packets) |
| 2038 | && !(urb->transfer_flags & URB_NO_INTERRUPT)) |
| 2039 | trans |= SITD_IOC; |
| 2040 | trans |= length << 16; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2041 | packet->transaction = cpu_to_hc32(ehci, trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | |
| 2043 | /* might need to cross a buffer page within a td */ |
| 2044 | packet->bufp = buf; |
| 2045 | packet->buf1 = (buf + length) & ~0x0fff; |
| 2046 | if (packet->buf1 != (buf & ~(u64)0x0fff)) |
| 2047 | packet->cross = 1; |
| 2048 | |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 2049 | /* OUT uses multiple start-splits */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | if (stream->bEndpointAddress & USB_DIR_IN) |
| 2051 | continue; |
| 2052 | length = (length + 187) / 188; |
| 2053 | if (length > 1) /* BEGIN vs ALL */ |
| 2054 | length |= 1 << 3; |
| 2055 | packet->buf1 |= length; |
| 2056 | } |
| 2057 | } |
| 2058 | |
| 2059 | static int |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2060 | sitd_urb_transaction( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | struct ehci_iso_stream *stream, |
| 2062 | struct ehci_hcd *ehci, |
| 2063 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 2064 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | ) |
| 2066 | { |
| 2067 | struct ehci_sitd *sitd; |
| 2068 | dma_addr_t sitd_dma; |
| 2069 | int i; |
| 2070 | struct ehci_iso_sched *iso_sched; |
| 2071 | unsigned long flags; |
| 2072 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2073 | iso_sched = iso_sched_alloc(urb->number_of_packets, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | if (iso_sched == NULL) |
| 2075 | return -ENOMEM; |
| 2076 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2077 | sitd_sched_init(ehci, iso_sched, stream, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
| 2079 | /* allocate/init sITDs */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2080 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | for (i = 0; i < urb->number_of_packets; i++) { |
| 2082 | |
| 2083 | /* NOTE: for now, we don't try to handle wraparound cases |
| 2084 | * for IN (using sitd->hw_backpointer, like a FSTN), which |
| 2085 | * means we never need two sitds for full speed packets. |
| 2086 | */ |
| 2087 | |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2088 | /* |
| 2089 | * Use siTDs from the free list, but not siTDs that may |
| 2090 | * still be in use by the hardware. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | */ |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2092 | if (likely(!list_empty(&stream->free_list))) { |
| 2093 | sitd = list_first_entry(&stream->free_list, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | struct ehci_sitd, sitd_list); |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2095 | if (sitd->frame == ehci->now_frame) |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2096 | goto alloc_sitd; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2097 | list_del(&sitd->sitd_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | sitd_dma = sitd->sitd_dma; |
Karsten Wiese | 3d01f0f | 2008-02-19 12:31:49 -0800 | [diff] [blame] | 2099 | } else { |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2100 | alloc_sitd: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2101 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 2102 | sitd = dma_pool_alloc(ehci->sitd_pool, mem_flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | &sitd_dma); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2104 | spin_lock_irqsave(&ehci->lock, flags); |
Karsten Wiese | 3d01f0f | 2008-02-19 12:31:49 -0800 | [diff] [blame] | 2105 | if (!sitd) { |
| 2106 | iso_sched_free(stream, iso_sched); |
| 2107 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 2108 | return -ENOMEM; |
| 2109 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | } |
| 2111 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2112 | memset(sitd, 0, sizeof *sitd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | sitd->sitd_dma = sitd_dma; |
Alan Stern | 91a99b5 | 2013-10-11 11:28:52 -0400 | [diff] [blame] | 2114 | sitd->frame = NO_FRAME; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2115 | list_add(&sitd->sitd_list, &iso_sched->td_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | } |
| 2117 | |
| 2118 | /* temporarily store schedule info in hcpriv */ |
| 2119 | urb->hcpriv = iso_sched; |
| 2120 | urb->error_count = 0; |
| 2121 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2122 | spin_unlock_irqrestore(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | return 0; |
| 2124 | } |
| 2125 | |
| 2126 | /*-------------------------------------------------------------------------*/ |
| 2127 | |
| 2128 | static inline void |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2129 | sitd_patch( |
| 2130 | struct ehci_hcd *ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | struct ehci_iso_stream *stream, |
| 2132 | struct ehci_sitd *sitd, |
| 2133 | struct ehci_iso_sched *iso_sched, |
| 2134 | unsigned index |
| 2135 | ) |
| 2136 | { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2137 | struct ehci_iso_packet *uf = &iso_sched->packet[index]; |
Geyslan G. Bem | 77d6554 | 2016-01-25 22:45:12 -0300 | [diff] [blame] | 2138 | u64 bufp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2140 | sitd->hw_next = EHCI_LIST_END(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | sitd->hw_fullspeed_ep = stream->address; |
| 2142 | sitd->hw_uframe = stream->splits; |
| 2143 | sitd->hw_results = uf->transaction; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2144 | sitd->hw_backpointer = EHCI_LIST_END(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | |
| 2146 | bufp = uf->bufp; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2147 | sitd->hw_buf[0] = cpu_to_hc32(ehci, bufp); |
| 2148 | sitd->hw_buf_hi[0] = cpu_to_hc32(ehci, bufp >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2150 | sitd->hw_buf[1] = cpu_to_hc32(ehci, uf->buf1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | if (uf->cross) |
| 2152 | bufp += 4096; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2153 | sitd->hw_buf_hi[1] = cpu_to_hc32(ehci, bufp >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | sitd->index = index; |
| 2155 | } |
| 2156 | |
| 2157 | static inline void |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2158 | sitd_link(struct ehci_hcd *ehci, unsigned frame, struct ehci_sitd *sitd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | { |
| 2160 | /* note: sitd ordering could matter (CSPLIT then SSPLIT) */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2161 | sitd->sitd_next = ehci->pshadow[frame]; |
| 2162 | sitd->hw_next = ehci->periodic[frame]; |
| 2163 | ehci->pshadow[frame].sitd = sitd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | sitd->frame = frame; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2165 | wmb(); |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2166 | ehci->periodic[frame] = cpu_to_hc32(ehci, sitd->sitd_dma | Q_TYPE_SITD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | } |
| 2168 | |
| 2169 | /* fit urb's sitds into the selected schedule slot; activate as needed */ |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 2170 | static void sitd_link_urb( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | struct ehci_hcd *ehci, |
| 2172 | struct urb *urb, |
| 2173 | unsigned mod, |
| 2174 | struct ehci_iso_stream *stream |
| 2175 | ) |
| 2176 | { |
| 2177 | int packet; |
| 2178 | unsigned next_uframe; |
| 2179 | struct ehci_iso_sched *sched = urb->hcpriv; |
| 2180 | struct ehci_sitd *sitd; |
| 2181 | |
| 2182 | next_uframe = stream->next_uframe; |
| 2183 | |
Xenia Ragiadakou | fea26ef | 2013-08-29 11:45:10 +0300 | [diff] [blame] | 2184 | if (list_empty(&stream->td_list)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | /* usbfs ignores TT bandwidth */ |
| 2186 | ehci_to_hcd(ehci)->self.bandwidth_allocated |
| 2187 | += stream->bandwidth; |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 2188 | |
| 2189 | if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) { |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 2190 | if (ehci->amd_pll_fix == 1) |
| 2191 | usb_amd_quirk_pll_disable(); |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 2192 | } |
| 2193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs++; |
| 2195 | |
| 2196 | /* fill sITDs frame by frame */ |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 2197 | for (packet = sched->first_packet, sitd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | packet < urb->number_of_packets; |
| 2199 | packet++) { |
| 2200 | |
| 2201 | /* ASSERT: we have all necessary sitds */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2202 | BUG_ON(list_empty(&sched->td_list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
| 2204 | /* ASSERT: no itds for this endpoint in this frame */ |
| 2205 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2206 | sitd = list_entry(sched->td_list.next, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | struct ehci_sitd, sitd_list); |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2208 | list_move_tail(&sitd->sitd_list, &stream->td_list); |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 2209 | sitd->stream = stream; |
Karsten Wiese | 508db8c | 2009-02-26 01:47:48 +0100 | [diff] [blame] | 2210 | sitd->urb = urb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2212 | sitd_patch(ehci, stream, sitd, sched, packet); |
Alan Stern | bccbefa | 2010-07-14 11:03:36 -0400 | [diff] [blame] | 2213 | sitd_link(ehci, (next_uframe >> 3) & (ehci->periodic_size - 1), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | sitd); |
| 2215 | |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 2216 | next_uframe += stream->uperiod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | } |
Alan Stern | bccbefa | 2010-07-14 11:03:36 -0400 | [diff] [blame] | 2218 | stream->next_uframe = next_uframe & (mod - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | |
| 2220 | /* don't need that schedule data any more */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2221 | iso_sched_free(stream, sched); |
Alan Stern | 2656a9a | 2012-11-08 10:17:01 -0500 | [diff] [blame] | 2222 | urb->hcpriv = stream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 2224 | ++ehci->isoc_count; |
Alan Stern | b015cb7 | 2012-07-11 11:22:10 -0400 | [diff] [blame] | 2225 | enable_periodic(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | } |
| 2227 | |
| 2228 | /*-------------------------------------------------------------------------*/ |
| 2229 | |
| 2230 | #define SITD_ERRS (SITD_STS_ERR | SITD_STS_DBE | SITD_STS_BABBLE \ |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 2231 | | SITD_STS_XACT | SITD_STS_MMF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2233 | /* Process and recycle a completed SITD. Return true iff its urb completed, |
| 2234 | * and hence its completion callback probably added things to the hardware |
| 2235 | * schedule. |
| 2236 | * |
| 2237 | * Note that we carefully avoid recycling this descriptor until after any |
| 2238 | * completion callback runs, so that it won't be reused quickly. That is, |
| 2239 | * assuming (a) no more than two urbs per frame on this endpoint, and also |
| 2240 | * (b) only this endpoint's completions submit URBs. It seems some silicon |
| 2241 | * corrupts things if you reuse completed descriptors very quickly... |
| 2242 | */ |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2243 | static bool sitd_complete(struct ehci_hcd *ehci, struct ehci_sitd *sitd) |
| 2244 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | struct urb *urb = sitd->urb; |
| 2246 | struct usb_iso_packet_descriptor *desc; |
| 2247 | u32 t; |
Geyslan G. Bem | 77d6554 | 2016-01-25 22:45:12 -0300 | [diff] [blame] | 2248 | int urb_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | struct ehci_iso_stream *stream = sitd->stream; |
| 2250 | struct usb_device *dev; |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2251 | bool retval = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | |
| 2253 | urb_index = sitd->index; |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2254 | desc = &urb->iso_frame_desc[urb_index]; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2255 | t = hc32_to_cpup(ehci, &sitd->hw_results); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | |
| 2257 | /* report transfer status */ |
Alan Stern | 4005ad4 | 2012-10-01 10:32:01 -0400 | [diff] [blame] | 2258 | if (unlikely(t & SITD_ERRS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | urb->error_count++; |
| 2260 | if (t & SITD_STS_DBE) |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2261 | desc->status = usb_pipein(urb->pipe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | ? -ENOSR /* hc couldn't read */ |
| 2263 | : -ECOMM; /* hc couldn't write */ |
| 2264 | else if (t & SITD_STS_BABBLE) |
| 2265 | desc->status = -EOVERFLOW; |
| 2266 | else /* XACT, MMF, etc */ |
| 2267 | desc->status = -EPROTO; |
Alan Stern | 4005ad4 | 2012-10-01 10:32:01 -0400 | [diff] [blame] | 2268 | } else if (unlikely(t & SITD_STS_ACTIVE)) { |
| 2269 | /* URB was too late */ |
| 2270 | urb->error_count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | } else { |
| 2272 | desc->status = 0; |
Alan Stern | ec6d67e | 2009-06-29 14:34:59 -0400 | [diff] [blame] | 2273 | desc->actual_length = desc->length - SITD_LENGTH(t); |
| 2274 | urb->actual_length += desc->actual_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | |
| 2277 | /* handle completion now? */ |
| 2278 | if ((urb_index + 1) != urb->number_of_packets) |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2279 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | |
Geyslan G. Bem | 1ec2780 | 2016-01-25 22:45:16 -0300 | [diff] [blame] | 2281 | /* |
| 2282 | * ASSERT: it's really the last sitd for this urb |
| 2283 | * list_for_each_entry (sitd, &stream->td_list, sitd_list) |
| 2284 | * BUG_ON(sitd->urb == urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | */ |
| 2286 | |
David Brownell | aa16ca3 | 2007-12-30 23:45:19 -0800 | [diff] [blame] | 2287 | /* give urb back to the driver; completion often (re)submits */ |
Alan Stern | 6a8e87b | 2006-01-19 10:46:27 -0500 | [diff] [blame] | 2288 | dev = urb->dev; |
Alan Stern | 14c04c0 | 2007-08-24 15:40:19 -0400 | [diff] [blame] | 2289 | ehci_urb_done(ehci, urb, 0); |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2290 | retval = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | urb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 2293 | --ehci->isoc_count; |
| 2294 | disable_periodic(ehci); |
| 2295 | |
| 2296 | ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs--; |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 2297 | if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) { |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 2298 | if (ehci->amd_pll_fix == 1) |
| 2299 | usb_amd_quirk_pll_enable(); |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 2300 | } |
| 2301 | |
Xenia Ragiadakou | fea26ef | 2013-08-29 11:45:10 +0300 | [diff] [blame] | 2302 | if (list_is_singular(&stream->td_list)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | ehci_to_hcd(ehci)->self.bandwidth_allocated |
| 2304 | -= stream->bandwidth; |
Alan Stern | 0e5f231 | 2010-04-08 16:56:37 -0400 | [diff] [blame] | 2305 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2306 | done: |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2307 | sitd->urb = NULL; |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2308 | |
| 2309 | /* Add to the end of the free list for later reuse */ |
| 2310 | list_move_tail(&sitd->sitd_list, &stream->free_list); |
| 2311 | |
| 2312 | /* Recycle the siTDs when the pipeline is empty (ep no longer in use) */ |
| 2313 | if (list_empty(&stream->td_list)) { |
| 2314 | list_splice_tail_init(&stream->free_list, |
| 2315 | &ehci->cached_sitd_list); |
| 2316 | start_free_itds(ehci); |
Alan Stern | 0e5f231 | 2010-04-08 16:56:37 -0400 | [diff] [blame] | 2317 | } |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 2318 | |
David Brownell | 30bf54e | 2007-12-16 22:37:40 -0800 | [diff] [blame] | 2319 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | } |
| 2321 | |
| 2322 | |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2323 | static int sitd_submit(struct ehci_hcd *ehci, struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 2324 | gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | { |
| 2326 | int status = -EINVAL; |
| 2327 | unsigned long flags; |
| 2328 | struct ehci_iso_stream *stream; |
| 2329 | |
| 2330 | /* Get iso_stream head */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2331 | stream = iso_stream_find(ehci, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | if (stream == NULL) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2333 | ehci_dbg(ehci, "can't get iso stream\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | return -ENOMEM; |
| 2335 | } |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 2336 | if (urb->interval != stream->ps.period) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2337 | ehci_dbg(ehci, "can't change iso interval %d --> %d\n", |
Alan Stern | ffa0248 | 2013-10-11 11:29:03 -0400 | [diff] [blame] | 2338 | stream->ps.period, urb->interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | goto done; |
| 2340 | } |
| 2341 | |
| 2342 | #ifdef EHCI_URB_TRACE |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2343 | ehci_dbg(ehci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | "submit %p dev%s ep%d%s-iso len %d\n", |
| 2345 | urb, urb->dev->devpath, |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2346 | usb_pipeendpoint(urb->pipe), |
| 2347 | usb_pipein(urb->pipe) ? "in" : "out", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | urb->transfer_buffer_length); |
| 2349 | #endif |
| 2350 | |
| 2351 | /* allocate SITDs */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2352 | status = sitd_urb_transaction(stream, ehci, urb, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | if (status < 0) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2354 | ehci_dbg(ehci, "can't init sitds\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | goto done; |
| 2356 | } |
| 2357 | |
| 2358 | /* schedule ... need to lock */ |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2359 | spin_lock_irqsave(&ehci->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2360 | if (unlikely(!HCD_HW_ACCESSIBLE(ehci_to_hcd(ehci)))) { |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 2361 | status = -ESHUTDOWN; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 2362 | goto done_not_linked; |
| 2363 | } |
| 2364 | status = usb_hcd_link_urb_to_ep(ehci_to_hcd(ehci), urb); |
| 2365 | if (unlikely(status)) |
| 2366 | goto done_not_linked; |
| 2367 | status = iso_stream_schedule(ehci, urb, stream); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 2368 | if (likely(status == 0)) { |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2369 | sitd_link_urb(ehci, urb, ehci->periodic_size << 3, stream); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 2370 | } else if (status > 0) { |
| 2371 | status = 0; |
| 2372 | ehci_urb_done(ehci, urb, 0); |
| 2373 | } else { |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 2374 | usb_hcd_unlink_urb_from_ep(ehci_to_hcd(ehci), urb); |
Alan Stern | 46c73d1 | 2013-09-03 13:59:03 -0400 | [diff] [blame] | 2375 | } |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 2376 | done_not_linked: |
Geyslan G. Bem | ee90647 | 2016-01-25 22:45:14 -0300 | [diff] [blame] | 2377 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 2378 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | return status; |
| 2380 | } |
| 2381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | /*-------------------------------------------------------------------------*/ |
| 2383 | |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 2384 | static void scan_isoc(struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | { |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2386 | unsigned uf, now_frame, frame; |
| 2387 | unsigned fmask = ehci->periodic_size - 1; |
| 2388 | bool modified, live; |
| 2389 | union ehci_shadow q, *q_p; |
| 2390 | __hc32 type, *hw_p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | |
| 2392 | /* |
| 2393 | * When running, scan from last scan point up to "now" |
| 2394 | * else clean up by scanning everything that's left. |
| 2395 | * Touches as few pages as possible: cache-friendly. |
| 2396 | */ |
Alan Stern | c0c53db | 2012-07-11 11:21:48 -0400 | [diff] [blame] | 2397 | if (ehci->rh_state >= EHCI_RH_RUNNING) { |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2398 | uf = ehci_read_frame_index(ehci); |
| 2399 | now_frame = (uf >> 3) & fmask; |
| 2400 | live = true; |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 2401 | } else { |
Alan Stern | c3ee9b7 | 2012-09-28 16:01:23 -0400 | [diff] [blame] | 2402 | now_frame = (ehci->last_iso_frame - 1) & fmask; |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2403 | live = false; |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 2404 | } |
Alan Stern | f428907 | 2012-07-11 11:23:07 -0400 | [diff] [blame] | 2405 | ehci->now_frame = now_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | |
Alan Stern | b09a61c | 2013-01-30 16:35:02 -0500 | [diff] [blame] | 2407 | frame = ehci->last_iso_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | |
| 2409 | restart: |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2410 | /* Scan each element in frame's queue for completions */ |
| 2411 | q_p = &ehci->pshadow[frame]; |
| 2412 | hw_p = &ehci->periodic[frame]; |
| 2413 | q.ptr = q_p->ptr; |
| 2414 | type = Q_NEXT_TYPE(ehci, *hw_p); |
| 2415 | modified = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2417 | while (q.ptr != NULL) { |
| 2418 | switch (hc32_to_cpu(ehci, type)) { |
| 2419 | case Q_TYPE_ITD: |
| 2420 | /* |
| 2421 | * If this ITD is still active, leave it for |
| 2422 | * later processing ... check the next entry. |
| 2423 | * No need to check for activity unless the |
| 2424 | * frame is current. |
| 2425 | */ |
| 2426 | if (frame == now_frame && live) { |
| 2427 | rmb(); |
| 2428 | for (uf = 0; uf < 8; uf++) { |
| 2429 | if (q.itd->hw_transaction[uf] & |
| 2430 | ITD_ACTIVE(ehci)) |
Alan Stern | b40e43f | 2008-05-20 16:59:10 -0400 | [diff] [blame] | 2431 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | } |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2433 | if (uf < 8) { |
| 2434 | q_p = &q.itd->itd_next; |
| 2435 | hw_p = &q.itd->hw_next; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2436 | type = Q_NEXT_TYPE(ehci, |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2437 | q.itd->hw_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | q = *q_p; |
| 2439 | break; |
| 2440 | } |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2441 | } |
David Brownell | 79592b72 | 2008-01-07 00:47:42 -0800 | [diff] [blame] | 2442 | |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2443 | /* |
| 2444 | * Take finished ITDs out of the schedule |
| 2445 | * and process them: recycle, maybe report |
| 2446 | * URB completion. HC won't cache the |
| 2447 | * pointer for much longer, if at all. |
| 2448 | */ |
| 2449 | *q_p = q.itd->itd_next; |
| 2450 | if (!ehci->use_dummy_qh || |
| 2451 | q.itd->hw_next != EHCI_LIST_END(ehci)) |
| 2452 | *hw_p = q.itd->hw_next; |
| 2453 | else |
| 2454 | *hw_p = cpu_to_hc32(ehci, ehci->dummy->qh_dma); |
| 2455 | type = Q_NEXT_TYPE(ehci, q.itd->hw_next); |
| 2456 | wmb(); |
| 2457 | modified = itd_complete(ehci, q.itd); |
| 2458 | q = *q_p; |
| 2459 | break; |
| 2460 | case Q_TYPE_SITD: |
| 2461 | /* |
| 2462 | * If this SITD is still active, leave it for |
| 2463 | * later processing ... check the next entry. |
| 2464 | * No need to check for activity unless the |
| 2465 | * frame is current. |
| 2466 | */ |
| 2467 | if (((frame == now_frame) || |
| 2468 | (((frame + 1) & fmask) == now_frame)) |
| 2469 | && live |
| 2470 | && (q.sitd->hw_results & SITD_ACTIVE(ehci))) { |
| 2471 | |
| 2472 | q_p = &q.sitd->sitd_next; |
| 2473 | hw_p = &q.sitd->hw_next; |
Stefan Roese | 6dbd682 | 2007-05-01 09:29:37 -0700 | [diff] [blame] | 2474 | type = Q_NEXT_TYPE(ehci, q.sitd->hw_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | q = *q_p; |
| 2476 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | } |
| 2478 | |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2479 | /* |
| 2480 | * Take finished SITDs out of the schedule |
| 2481 | * and process them: recycle, maybe report |
| 2482 | * URB completion. |
| 2483 | */ |
| 2484 | *q_p = q.sitd->sitd_next; |
| 2485 | if (!ehci->use_dummy_qh || |
| 2486 | q.sitd->hw_next != EHCI_LIST_END(ehci)) |
| 2487 | *hw_p = q.sitd->hw_next; |
| 2488 | else |
| 2489 | *hw_p = cpu_to_hc32(ehci, ehci->dummy->qh_dma); |
| 2490 | type = Q_NEXT_TYPE(ehci, q.sitd->hw_next); |
| 2491 | wmb(); |
| 2492 | modified = sitd_complete(ehci, q.sitd); |
| 2493 | q = *q_p; |
| 2494 | break; |
| 2495 | default: |
| 2496 | ehci_dbg(ehci, "corrupt type %d frame %d shadow %p\n", |
| 2497 | type, frame, q.ptr); |
| 2498 | /* BUG(); */ |
| 2499 | /* FALL THROUGH */ |
| 2500 | case Q_TYPE_QH: |
| 2501 | case Q_TYPE_FSTN: |
| 2502 | /* End of the iTDs and siTDs */ |
| 2503 | q.ptr = NULL; |
| 2504 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | } |
| 2506 | |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2507 | /* Assume completion callbacks modify the queue */ |
| 2508 | if (unlikely(modified && ehci->isoc_count > 0)) |
| 2509 | goto restart; |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 2510 | } |
Geyslan G. Bem | 3f122a9 | 2016-01-25 22:45:10 -0300 | [diff] [blame] | 2511 | |
| 2512 | /* Stop when we have reached the current frame */ |
| 2513 | if (frame == now_frame) |
| 2514 | return; |
| 2515 | |
| 2516 | /* The last frame may still have active siTDs */ |
| 2517 | ehci->last_iso_frame = frame; |
| 2518 | frame = (frame + 1) & fmask; |
| 2519 | |
| 2520 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | } |