Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * xHCI host controller driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Intel Corp. |
| 5 | * |
| 6 | * Author: Sarah Sharp |
| 7 | * Some code borrowed from the Linux EHCI driver. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 16 | * for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software Foundation, |
| 20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/irq.h> |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 24 | #include <linux/log2.h> |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 25 | #include <linux/module.h> |
Sarah Sharp | b0567b3 | 2009-08-07 14:04:36 -0700 | [diff] [blame] | 26 | #include <linux/moduleparam.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 28 | |
| 29 | #include "xhci.h" |
| 30 | |
| 31 | #define DRIVER_AUTHOR "Sarah Sharp" |
| 32 | #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" |
| 33 | |
Sarah Sharp | b0567b3 | 2009-08-07 14:04:36 -0700 | [diff] [blame] | 34 | /* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */ |
| 35 | static int link_quirk; |
| 36 | module_param(link_quirk, int, S_IRUGO | S_IWUSR); |
| 37 | MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); |
| 38 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 39 | /* TODO: copied from ehci-hcd.c - can this be refactored? */ |
| 40 | /* |
| 41 | * handshake - spin reading hc until handshake completes or fails |
| 42 | * @ptr: address of hc register to be read |
| 43 | * @mask: bits to look at in result of read |
| 44 | * @done: value of those bits when handshake succeeds |
| 45 | * @usec: timeout in microseconds |
| 46 | * |
| 47 | * Returns negative errno, or zero on success |
| 48 | * |
| 49 | * Success happens when the "mask" bits have the specified value (hardware |
| 50 | * handshake done). There are two failure modes: "usec" have passed (major |
| 51 | * hardware flakeout), or the register reads as all-ones (hardware removed). |
| 52 | */ |
| 53 | static int handshake(struct xhci_hcd *xhci, void __iomem *ptr, |
| 54 | u32 mask, u32 done, int usec) |
| 55 | { |
| 56 | u32 result; |
| 57 | |
| 58 | do { |
| 59 | result = xhci_readl(xhci, ptr); |
| 60 | if (result == ~(u32)0) /* card removed */ |
| 61 | return -ENODEV; |
| 62 | result &= mask; |
| 63 | if (result == done) |
| 64 | return 0; |
| 65 | udelay(1); |
| 66 | usec--; |
| 67 | } while (usec > 0); |
| 68 | return -ETIMEDOUT; |
| 69 | } |
| 70 | |
| 71 | /* |
Sarah Sharp | 4f0f0ba | 2009-10-27 10:56:33 -0700 | [diff] [blame] | 72 | * Disable interrupts and begin the xHCI halting process. |
| 73 | */ |
| 74 | void xhci_quiesce(struct xhci_hcd *xhci) |
| 75 | { |
| 76 | u32 halted; |
| 77 | u32 cmd; |
| 78 | u32 mask; |
| 79 | |
| 80 | mask = ~(XHCI_IRQS); |
| 81 | halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT; |
| 82 | if (!halted) |
| 83 | mask &= ~CMD_RUN; |
| 84 | |
| 85 | cmd = xhci_readl(xhci, &xhci->op_regs->command); |
| 86 | cmd &= mask; |
| 87 | xhci_writel(xhci, cmd, &xhci->op_regs->command); |
| 88 | } |
| 89 | |
| 90 | /* |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 91 | * Force HC into halt state. |
| 92 | * |
| 93 | * Disable any IRQs and clear the run/stop bit. |
| 94 | * HC will complete any current and actively pipelined transactions, and |
| 95 | * should halt within 16 microframes of the run/stop bit being cleared. |
| 96 | * Read HC Halted bit in the status register to see when the HC is finished. |
| 97 | * XXX: shouldn't we set HC_STATE_HALT here somewhere? |
| 98 | */ |
| 99 | int xhci_halt(struct xhci_hcd *xhci) |
| 100 | { |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 101 | xhci_dbg(xhci, "// Halt the HC\n"); |
Sarah Sharp | 4f0f0ba | 2009-10-27 10:56:33 -0700 | [diff] [blame] | 102 | xhci_quiesce(xhci); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 103 | |
| 104 | return handshake(xhci, &xhci->op_regs->status, |
| 105 | STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * Reset a halted HC, and set the internal HC state to HC_STATE_HALT. |
| 110 | * |
| 111 | * This resets pipelines, timers, counters, state machines, etc. |
| 112 | * Transactions will be terminated immediately, and operational registers |
| 113 | * will be set to their defaults. |
| 114 | */ |
| 115 | int xhci_reset(struct xhci_hcd *xhci) |
| 116 | { |
| 117 | u32 command; |
| 118 | u32 state; |
| 119 | |
| 120 | state = xhci_readl(xhci, &xhci->op_regs->status); |
Sarah Sharp | d3512f6 | 2009-07-27 12:03:50 -0700 | [diff] [blame] | 121 | if ((state & STS_HALT) == 0) { |
| 122 | xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); |
| 123 | return 0; |
| 124 | } |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 125 | |
| 126 | xhci_dbg(xhci, "// Reset the HC\n"); |
| 127 | command = xhci_readl(xhci, &xhci->op_regs->command); |
| 128 | command |= CMD_RESET; |
| 129 | xhci_writel(xhci, command, &xhci->op_regs->command); |
| 130 | /* XXX: Why does EHCI set this here? Shouldn't other code do this? */ |
| 131 | xhci_to_hcd(xhci)->state = HC_STATE_HALT; |
| 132 | |
| 133 | return handshake(xhci, &xhci->op_regs->command, CMD_RESET, 0, 250 * 1000); |
| 134 | } |
| 135 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 136 | |
| 137 | #if 0 |
| 138 | /* Set up MSI-X table for entry 0 (may claim other entries later) */ |
| 139 | static int xhci_setup_msix(struct xhci_hcd *xhci) |
| 140 | { |
| 141 | int ret; |
| 142 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
| 143 | |
| 144 | xhci->msix_count = 0; |
| 145 | /* XXX: did I do this right? ixgbe does kcalloc for more than one */ |
| 146 | xhci->msix_entries = kmalloc(sizeof(struct msix_entry), GFP_KERNEL); |
| 147 | if (!xhci->msix_entries) { |
| 148 | xhci_err(xhci, "Failed to allocate MSI-X entries\n"); |
| 149 | return -ENOMEM; |
| 150 | } |
| 151 | xhci->msix_entries[0].entry = 0; |
| 152 | |
| 153 | ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); |
| 154 | if (ret) { |
| 155 | xhci_err(xhci, "Failed to enable MSI-X\n"); |
| 156 | goto free_entries; |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Pass the xhci pointer value as the request_irq "cookie". |
| 161 | * If more irqs are added, this will need to be unique for each one. |
| 162 | */ |
| 163 | ret = request_irq(xhci->msix_entries[0].vector, &xhci_irq, 0, |
| 164 | "xHCI", xhci_to_hcd(xhci)); |
| 165 | if (ret) { |
| 166 | xhci_err(xhci, "Failed to allocate MSI-X interrupt\n"); |
| 167 | goto disable_msix; |
| 168 | } |
| 169 | xhci_dbg(xhci, "Finished setting up MSI-X\n"); |
| 170 | return 0; |
| 171 | |
| 172 | disable_msix: |
| 173 | pci_disable_msix(pdev); |
| 174 | free_entries: |
| 175 | kfree(xhci->msix_entries); |
| 176 | xhci->msix_entries = NULL; |
| 177 | return ret; |
| 178 | } |
| 179 | |
| 180 | /* XXX: code duplication; can xhci_setup_msix call this? */ |
| 181 | /* Free any IRQs and disable MSI-X */ |
| 182 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) |
| 183 | { |
| 184 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
| 185 | if (!xhci->msix_entries) |
| 186 | return; |
| 187 | |
| 188 | free_irq(xhci->msix_entries[0].vector, xhci); |
| 189 | pci_disable_msix(pdev); |
| 190 | kfree(xhci->msix_entries); |
| 191 | xhci->msix_entries = NULL; |
| 192 | xhci_dbg(xhci, "Finished cleaning up MSI-X\n"); |
| 193 | } |
| 194 | #endif |
| 195 | |
| 196 | /* |
| 197 | * Initialize memory for HCD and xHC (one-time init). |
| 198 | * |
| 199 | * Program the PAGESIZE register, initialize the device context array, create |
| 200 | * device contexts (?), set up a command ring segment (or two?), create event |
| 201 | * ring (one for now). |
| 202 | */ |
| 203 | int xhci_init(struct usb_hcd *hcd) |
| 204 | { |
| 205 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 206 | int retval = 0; |
| 207 | |
| 208 | xhci_dbg(xhci, "xhci_init\n"); |
| 209 | spin_lock_init(&xhci->lock); |
Sarah Sharp | b0567b3 | 2009-08-07 14:04:36 -0700 | [diff] [blame] | 210 | if (link_quirk) { |
| 211 | xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); |
| 212 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; |
| 213 | } else { |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 214 | xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); |
Sarah Sharp | b0567b3 | 2009-08-07 14:04:36 -0700 | [diff] [blame] | 215 | } |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 216 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
| 217 | xhci_dbg(xhci, "Finished xhci_init\n"); |
| 218 | |
| 219 | return retval; |
| 220 | } |
| 221 | |
| 222 | /* |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 223 | * Called in interrupt context when there might be work |
| 224 | * queued on the event ring |
| 225 | * |
| 226 | * xhci->lock must be held by caller. |
| 227 | */ |
| 228 | static void xhci_work(struct xhci_hcd *xhci) |
| 229 | { |
| 230 | u32 temp; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 231 | u64 temp_64; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 232 | |
| 233 | /* |
| 234 | * Clear the op reg interrupt status first, |
| 235 | * so we can receive interrupts from other MSI-X interrupters. |
| 236 | * Write 1 to clear the interrupt status. |
| 237 | */ |
| 238 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
| 239 | temp |= STS_EINT; |
| 240 | xhci_writel(xhci, temp, &xhci->op_regs->status); |
| 241 | /* FIXME when MSI-X is supported and there are multiple vectors */ |
| 242 | /* Clear the MSI-X event interrupt status */ |
| 243 | |
| 244 | /* Acknowledge the interrupt */ |
| 245 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
| 246 | temp |= 0x3; |
| 247 | xhci_writel(xhci, temp, &xhci->ir_set->irq_pending); |
| 248 | /* Flush posted writes */ |
| 249 | xhci_readl(xhci, &xhci->ir_set->irq_pending); |
| 250 | |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 251 | if (xhci->xhc_state & XHCI_STATE_DYING) |
| 252 | xhci_dbg(xhci, "xHCI dying, ignoring interrupt. " |
| 253 | "Shouldn't IRQs be disabled?\n"); |
| 254 | else |
| 255 | /* FIXME this should be a delayed service routine |
| 256 | * that clears the EHB. |
| 257 | */ |
| 258 | xhci_handle_event(xhci); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 259 | |
Sarah Sharp | 2d83109 | 2009-07-27 12:03:40 -0700 | [diff] [blame] | 260 | /* Clear the event handler busy flag (RW1C); the event ring should be empty. */ |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 261 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
Sarah Sharp | 2d83109 | 2009-07-27 12:03:40 -0700 | [diff] [blame] | 262 | xhci_write_64(xhci, temp_64 | ERST_EHB, &xhci->ir_set->erst_dequeue); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 263 | /* Flush posted writes -- FIXME is this necessary? */ |
| 264 | xhci_readl(xhci, &xhci->ir_set->irq_pending); |
| 265 | } |
| 266 | |
| 267 | /*-------------------------------------------------------------------------*/ |
| 268 | |
| 269 | /* |
| 270 | * xHCI spec says we can get an interrupt, and if the HC has an error condition, |
| 271 | * we might get bad data out of the event ring. Section 4.10.2.7 has a list of |
| 272 | * indicators of an event TRB error, but we check the status *first* to be safe. |
| 273 | */ |
| 274 | irqreturn_t xhci_irq(struct usb_hcd *hcd) |
| 275 | { |
| 276 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 277 | u32 temp, temp2; |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 278 | union xhci_trb *trb; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 279 | |
| 280 | spin_lock(&xhci->lock); |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 281 | trb = xhci->event_ring->dequeue; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 282 | /* Check if the xHC generated the interrupt, or the irq is shared */ |
| 283 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
| 284 | temp2 = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
Sarah Sharp | fcf8f57 | 2009-07-27 12:04:01 -0700 | [diff] [blame] | 285 | if (temp == 0xffffffff && temp2 == 0xffffffff) |
| 286 | goto hw_died; |
| 287 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 288 | if (!(temp & STS_EINT) && !ER_IRQ_PENDING(temp2)) { |
| 289 | spin_unlock(&xhci->lock); |
| 290 | return IRQ_NONE; |
| 291 | } |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 292 | xhci_dbg(xhci, "op reg status = %08x\n", temp); |
| 293 | xhci_dbg(xhci, "ir set irq_pending = %08x\n", temp2); |
| 294 | xhci_dbg(xhci, "Event ring dequeue ptr:\n"); |
| 295 | xhci_dbg(xhci, "@%llx %08x %08x %08x %08x\n", |
| 296 | (unsigned long long)xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, trb), |
| 297 | lower_32_bits(trb->link.segment_ptr), |
| 298 | upper_32_bits(trb->link.segment_ptr), |
| 299 | (unsigned int) trb->link.intr_target, |
| 300 | (unsigned int) trb->link.control); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 301 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 302 | if (temp & STS_FATAL) { |
| 303 | xhci_warn(xhci, "WARNING: Host System Error\n"); |
| 304 | xhci_halt(xhci); |
Sarah Sharp | fcf8f57 | 2009-07-27 12:04:01 -0700 | [diff] [blame] | 305 | hw_died: |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 306 | xhci_to_hcd(xhci)->state = HC_STATE_HALT; |
Sarah Sharp | c96a2b8 | 2009-04-29 19:05:40 -0700 | [diff] [blame] | 307 | spin_unlock(&xhci->lock); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 308 | return -ESHUTDOWN; |
| 309 | } |
| 310 | |
| 311 | xhci_work(xhci); |
| 312 | spin_unlock(&xhci->lock); |
| 313 | |
| 314 | return IRQ_HANDLED; |
| 315 | } |
| 316 | |
| 317 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 318 | void xhci_event_ring_work(unsigned long arg) |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 319 | { |
| 320 | unsigned long flags; |
| 321 | int temp; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 322 | u64 temp_64; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 323 | struct xhci_hcd *xhci = (struct xhci_hcd *) arg; |
| 324 | int i, j; |
| 325 | |
| 326 | xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); |
| 327 | |
| 328 | spin_lock_irqsave(&xhci->lock, flags); |
| 329 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
| 330 | xhci_dbg(xhci, "op reg status = 0x%x\n", temp); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 331 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
Sarah Sharp | e4ab05d | 2009-09-16 16:42:30 -0700 | [diff] [blame] | 332 | xhci_dbg(xhci, "HW died, polling stopped.\n"); |
| 333 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 334 | return; |
| 335 | } |
| 336 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 337 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
| 338 | xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); |
| 339 | xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled); |
| 340 | xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); |
| 341 | xhci->error_bitmask = 0; |
| 342 | xhci_dbg(xhci, "Event ring:\n"); |
| 343 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); |
| 344 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 345 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
| 346 | temp_64 &= ~ERST_PTR_MASK; |
| 347 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 348 | xhci_dbg(xhci, "Command ring:\n"); |
| 349 | xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); |
| 350 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); |
| 351 | xhci_dbg_cmd_ptrs(xhci); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 352 | for (i = 0; i < MAX_HC_SLOTS; ++i) { |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 353 | if (!xhci->devs[i]) |
| 354 | continue; |
| 355 | for (j = 0; j < 31; ++j) { |
Sarah Sharp | e9df17e | 2010-04-02 15:34:43 -0700 | [diff] [blame] | 356 | xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 357 | } |
| 358 | } |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 359 | |
| 360 | if (xhci->noops_submitted != NUM_TEST_NOOPS) |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 361 | if (xhci_setup_one_noop(xhci)) |
| 362 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 363 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 364 | |
| 365 | if (!xhci->zombie) |
| 366 | mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); |
| 367 | else |
| 368 | xhci_dbg(xhci, "Quit polling the event ring.\n"); |
| 369 | } |
| 370 | #endif |
| 371 | |
| 372 | /* |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 373 | * Start the HC after it was halted. |
| 374 | * |
| 375 | * This function is called by the USB core when the HC driver is added. |
| 376 | * Its opposite is xhci_stop(). |
| 377 | * |
| 378 | * xhci_init() must be called once before this function can be called. |
| 379 | * Reset the HC, enable device slot contexts, program DCBAAP, and |
| 380 | * set command ring pointer and event ring pointer. |
| 381 | * |
| 382 | * Setup MSI-X vectors and enable interrupts. |
| 383 | */ |
| 384 | int xhci_run(struct usb_hcd *hcd) |
| 385 | { |
| 386 | u32 temp; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 387 | u64 temp_64; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 388 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 389 | void (*doorbell)(struct xhci_hcd *) = NULL; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 390 | |
Sarah Sharp | 0f2a793 | 2009-04-27 19:57:12 -0700 | [diff] [blame] | 391 | hcd->uses_new_polling = 1; |
| 392 | hcd->poll_rh = 0; |
| 393 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 394 | xhci_dbg(xhci, "xhci_run\n"); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 395 | #if 0 /* FIXME: MSI not setup yet */ |
| 396 | /* Do this at the very last minute */ |
| 397 | ret = xhci_setup_msix(xhci); |
| 398 | if (!ret) |
| 399 | return ret; |
| 400 | |
| 401 | return -ENOSYS; |
| 402 | #endif |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 403 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
| 404 | init_timer(&xhci->event_ring_timer); |
| 405 | xhci->event_ring_timer.data = (unsigned long) xhci; |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 406 | xhci->event_ring_timer.function = xhci_event_ring_work; |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 407 | /* Poll the event ring */ |
| 408 | xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; |
| 409 | xhci->zombie = 0; |
| 410 | xhci_dbg(xhci, "Setting event ring polling timer\n"); |
| 411 | add_timer(&xhci->event_ring_timer); |
| 412 | #endif |
| 413 | |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 414 | xhci_dbg(xhci, "Command ring memory map follows:\n"); |
| 415 | xhci_debug_ring(xhci, xhci->cmd_ring); |
| 416 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); |
| 417 | xhci_dbg_cmd_ptrs(xhci); |
| 418 | |
| 419 | xhci_dbg(xhci, "ERST memory map follows:\n"); |
| 420 | xhci_dbg_erst(xhci, &xhci->erst); |
| 421 | xhci_dbg(xhci, "Event ring:\n"); |
| 422 | xhci_debug_ring(xhci, xhci->event_ring); |
| 423 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); |
| 424 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
| 425 | temp_64 &= ~ERST_PTR_MASK; |
| 426 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); |
| 427 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 428 | xhci_dbg(xhci, "// Set the interrupt modulation register\n"); |
| 429 | temp = xhci_readl(xhci, &xhci->ir_set->irq_control); |
Sarah Sharp | a4d8830 | 2009-05-14 11:44:26 -0700 | [diff] [blame] | 430 | temp &= ~ER_IRQ_INTERVAL_MASK; |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 431 | temp |= (u32) 160; |
| 432 | xhci_writel(xhci, temp, &xhci->ir_set->irq_control); |
| 433 | |
| 434 | /* Set the HCD state before we enable the irqs */ |
| 435 | hcd->state = HC_STATE_RUNNING; |
| 436 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
| 437 | temp |= (CMD_EIE); |
| 438 | xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", |
| 439 | temp); |
| 440 | xhci_writel(xhci, temp, &xhci->op_regs->command); |
| 441 | |
| 442 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 443 | xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", |
| 444 | xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 445 | xhci_writel(xhci, ER_IRQ_ENABLE(temp), |
| 446 | &xhci->ir_set->irq_pending); |
| 447 | xhci_print_ir_set(xhci, xhci->ir_set, 0); |
| 448 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 449 | if (NUM_TEST_NOOPS > 0) |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 450 | doorbell = xhci_setup_one_noop(xhci); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 451 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 452 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
| 453 | temp |= (CMD_RUN); |
| 454 | xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n", |
| 455 | temp); |
| 456 | xhci_writel(xhci, temp, &xhci->op_regs->command); |
| 457 | /* Flush PCI posted writes */ |
| 458 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 459 | xhci_dbg(xhci, "// @%p = 0x%x\n", &xhci->op_regs->command, temp); |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 460 | if (doorbell) |
| 461 | (*doorbell)(xhci); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 462 | |
| 463 | xhci_dbg(xhci, "Finished xhci_run\n"); |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * Stop xHCI driver. |
| 469 | * |
| 470 | * This function is called by the USB core when the HC driver is removed. |
| 471 | * Its opposite is xhci_run(). |
| 472 | * |
| 473 | * Disable device contexts, disable IRQs, and quiesce the HC. |
| 474 | * Reset the HC, finish any completed transactions, and cleanup memory. |
| 475 | */ |
| 476 | void xhci_stop(struct usb_hcd *hcd) |
| 477 | { |
| 478 | u32 temp; |
| 479 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 480 | |
| 481 | spin_lock_irq(&xhci->lock); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 482 | xhci_halt(xhci); |
| 483 | xhci_reset(xhci); |
| 484 | spin_unlock_irq(&xhci->lock); |
| 485 | |
| 486 | #if 0 /* No MSI yet */ |
| 487 | xhci_cleanup_msix(xhci); |
| 488 | #endif |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 489 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
| 490 | /* Tell the event ring poll function not to reschedule */ |
| 491 | xhci->zombie = 1; |
| 492 | del_timer_sync(&xhci->event_ring_timer); |
| 493 | #endif |
| 494 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 495 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
| 496 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
| 497 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); |
| 498 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
| 499 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), |
| 500 | &xhci->ir_set->irq_pending); |
| 501 | xhci_print_ir_set(xhci, xhci->ir_set, 0); |
| 502 | |
| 503 | xhci_dbg(xhci, "cleaning up memory\n"); |
| 504 | xhci_mem_cleanup(xhci); |
| 505 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", |
| 506 | xhci_readl(xhci, &xhci->op_regs->status)); |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Shutdown HC (not bus-specific) |
| 511 | * |
| 512 | * This is called when the machine is rebooting or halting. We assume that the |
| 513 | * machine will be powered off, and the HC's internal state will be reset. |
| 514 | * Don't bother to free memory. |
| 515 | */ |
| 516 | void xhci_shutdown(struct usb_hcd *hcd) |
| 517 | { |
| 518 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 519 | |
| 520 | spin_lock_irq(&xhci->lock); |
| 521 | xhci_halt(xhci); |
| 522 | spin_unlock_irq(&xhci->lock); |
| 523 | |
| 524 | #if 0 |
| 525 | xhci_cleanup_msix(xhci); |
| 526 | #endif |
| 527 | |
| 528 | xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", |
| 529 | xhci_readl(xhci, &xhci->op_regs->status)); |
| 530 | } |
| 531 | |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 532 | /*-------------------------------------------------------------------------*/ |
| 533 | |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 534 | /** |
| 535 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and |
| 536 | * HCDs. Find the index for an endpoint given its descriptor. Use the return |
| 537 | * value to right shift 1 for the bitmask. |
| 538 | * |
| 539 | * Index = (epnum * 2) + direction - 1, |
| 540 | * where direction = 0 for OUT, 1 for IN. |
| 541 | * For control endpoints, the IN index is used (OUT index is unused), so |
| 542 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) |
| 543 | */ |
| 544 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) |
| 545 | { |
| 546 | unsigned int index; |
| 547 | if (usb_endpoint_xfer_control(desc)) |
| 548 | index = (unsigned int) (usb_endpoint_num(desc)*2); |
| 549 | else |
| 550 | index = (unsigned int) (usb_endpoint_num(desc)*2) + |
| 551 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; |
| 552 | return index; |
| 553 | } |
| 554 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 555 | /* Find the flag for this endpoint (for use in the control context). Use the |
| 556 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is |
| 557 | * bit 1, etc. |
| 558 | */ |
| 559 | unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) |
| 560 | { |
| 561 | return 1 << (xhci_get_endpoint_index(desc) + 1); |
| 562 | } |
| 563 | |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 564 | /* Find the flag for this endpoint (for use in the control context). Use the |
| 565 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is |
| 566 | * bit 1, etc. |
| 567 | */ |
| 568 | unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index) |
| 569 | { |
| 570 | return 1 << (ep_index + 1); |
| 571 | } |
| 572 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 573 | /* Compute the last valid endpoint context index. Basically, this is the |
| 574 | * endpoint index plus one. For slot contexts with more than valid endpoint, |
| 575 | * we find the most significant bit set in the added contexts flags. |
| 576 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 |
| 577 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. |
| 578 | */ |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 579 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 580 | { |
| 581 | return fls(added_ctxs) - 1; |
| 582 | } |
| 583 | |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 584 | /* Returns 1 if the arguments are OK; |
| 585 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. |
| 586 | */ |
| 587 | int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, |
| 588 | struct usb_host_endpoint *ep, int check_ep, const char *func) { |
| 589 | if (!hcd || (check_ep && !ep) || !udev) { |
| 590 | printk(KERN_DEBUG "xHCI %s called with invalid args\n", |
| 591 | func); |
| 592 | return -EINVAL; |
| 593 | } |
| 594 | if (!udev->parent) { |
| 595 | printk(KERN_DEBUG "xHCI %s called for root hub\n", |
| 596 | func); |
| 597 | return 0; |
| 598 | } |
| 599 | if (!udev->slot_id) { |
| 600 | printk(KERN_DEBUG "xHCI %s called with unaddressed device\n", |
| 601 | func); |
| 602 | return -EINVAL; |
| 603 | } |
| 604 | return 1; |
| 605 | } |
| 606 | |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 607 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 608 | struct usb_device *udev, struct xhci_command *command, |
| 609 | bool ctx_change, bool must_succeed); |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 610 | |
| 611 | /* |
| 612 | * Full speed devices may have a max packet size greater than 8 bytes, but the |
| 613 | * USB core doesn't know that until it reads the first 8 bytes of the |
| 614 | * descriptor. If the usb_device's max packet size changes after that point, |
| 615 | * we need to issue an evaluate context command and wait on it. |
| 616 | */ |
| 617 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, |
| 618 | unsigned int ep_index, struct urb *urb) |
| 619 | { |
| 620 | struct xhci_container_ctx *in_ctx; |
| 621 | struct xhci_container_ctx *out_ctx; |
| 622 | struct xhci_input_control_ctx *ctrl_ctx; |
| 623 | struct xhci_ep_ctx *ep_ctx; |
| 624 | int max_packet_size; |
| 625 | int hw_max_packet_size; |
| 626 | int ret = 0; |
| 627 | |
| 628 | out_ctx = xhci->devs[slot_id]->out_ctx; |
| 629 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
| 630 | hw_max_packet_size = MAX_PACKET_DECODED(ep_ctx->ep_info2); |
| 631 | max_packet_size = urb->dev->ep0.desc.wMaxPacketSize; |
| 632 | if (hw_max_packet_size != max_packet_size) { |
| 633 | xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); |
| 634 | xhci_dbg(xhci, "Max packet size in usb_device = %d\n", |
| 635 | max_packet_size); |
| 636 | xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", |
| 637 | hw_max_packet_size); |
| 638 | xhci_dbg(xhci, "Issuing evaluate context command.\n"); |
| 639 | |
| 640 | /* Set up the modified control endpoint 0 */ |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 641 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
| 642 | xhci->devs[slot_id]->out_ctx, ep_index); |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 643 | in_ctx = xhci->devs[slot_id]->in_ctx; |
| 644 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); |
| 645 | ep_ctx->ep_info2 &= ~MAX_PACKET_MASK; |
| 646 | ep_ctx->ep_info2 |= MAX_PACKET(max_packet_size); |
| 647 | |
| 648 | /* Set up the input context flags for the command */ |
| 649 | /* FIXME: This won't work if a non-default control endpoint |
| 650 | * changes max packet sizes. |
| 651 | */ |
| 652 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
| 653 | ctrl_ctx->add_flags = EP0_FLAG; |
| 654 | ctrl_ctx->drop_flags = 0; |
| 655 | |
| 656 | xhci_dbg(xhci, "Slot %d input context\n", slot_id); |
| 657 | xhci_dbg_ctx(xhci, in_ctx, ep_index); |
| 658 | xhci_dbg(xhci, "Slot %d output context\n", slot_id); |
| 659 | xhci_dbg_ctx(xhci, out_ctx, ep_index); |
| 660 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 661 | ret = xhci_configure_endpoint(xhci, urb->dev, NULL, |
| 662 | true, false); |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 663 | |
| 664 | /* Clean up the input context for later use by bandwidth |
| 665 | * functions. |
| 666 | */ |
| 667 | ctrl_ctx->add_flags = SLOT_FLAG; |
| 668 | } |
| 669 | return ret; |
| 670 | } |
| 671 | |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 672 | /* |
| 673 | * non-error returns are a promise to giveback() the urb later |
| 674 | * we drop ownership so next owner (or urb unlink) can get it |
| 675 | */ |
| 676 | int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) |
| 677 | { |
| 678 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 679 | unsigned long flags; |
| 680 | int ret = 0; |
| 681 | unsigned int slot_id, ep_index; |
| 682 | |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 683 | |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 684 | if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, true, __func__) <= 0) |
| 685 | return -EINVAL; |
| 686 | |
| 687 | slot_id = urb->dev->slot_id; |
| 688 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 689 | |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 690 | if (!xhci->devs || !xhci->devs[slot_id]) { |
| 691 | if (!in_interrupt()) |
| 692 | dev_warn(&urb->dev->dev, "WARN: urb submitted for dev with no Slot ID\n"); |
Sarah Sharp | c7959fb | 2009-04-29 19:06:36 -0700 | [diff] [blame] | 693 | ret = -EINVAL; |
| 694 | goto exit; |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 695 | } |
| 696 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
| 697 | if (!in_interrupt()) |
| 698 | xhci_dbg(xhci, "urb submitted during PCI suspend\n"); |
| 699 | ret = -ESHUTDOWN; |
| 700 | goto exit; |
| 701 | } |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 702 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
| 703 | /* Check to see if the max packet size for the default control |
| 704 | * endpoint changed during FS device enumeration |
| 705 | */ |
| 706 | if (urb->dev->speed == USB_SPEED_FULL) { |
| 707 | ret = xhci_check_maxpacket(xhci, slot_id, |
| 708 | ep_index, urb); |
| 709 | if (ret < 0) |
| 710 | return ret; |
| 711 | } |
| 712 | |
Sarah Sharp | b11069f | 2009-07-27 12:03:23 -0700 | [diff] [blame] | 713 | /* We have a spinlock and interrupts disabled, so we must pass |
| 714 | * atomic context to this function, which may allocate memory. |
| 715 | */ |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 716 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 717 | if (xhci->xhc_state & XHCI_STATE_DYING) |
| 718 | goto dying; |
Sarah Sharp | b11069f | 2009-07-27 12:03:23 -0700 | [diff] [blame] | 719 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 720 | slot_id, ep_index); |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 721 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 722 | } else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) { |
| 723 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 724 | if (xhci->xhc_state & XHCI_STATE_DYING) |
| 725 | goto dying; |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 726 | if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
| 727 | EP_GETTING_STREAMS) { |
| 728 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " |
| 729 | "is transitioning to using streams.\n"); |
| 730 | ret = -EINVAL; |
| 731 | } else if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
| 732 | EP_GETTING_NO_STREAMS) { |
| 733 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " |
| 734 | "is transitioning to " |
| 735 | "not having streams.\n"); |
| 736 | ret = -EINVAL; |
| 737 | } else { |
| 738 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, |
| 739 | slot_id, ep_index); |
| 740 | } |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 741 | spin_unlock_irqrestore(&xhci->lock, flags); |
Sarah Sharp | 624defa | 2009-09-02 12:14:28 -0700 | [diff] [blame] | 742 | } else if (usb_endpoint_xfer_int(&urb->ep->desc)) { |
| 743 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 744 | if (xhci->xhc_state & XHCI_STATE_DYING) |
| 745 | goto dying; |
Sarah Sharp | 624defa | 2009-09-02 12:14:28 -0700 | [diff] [blame] | 746 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
| 747 | slot_id, ep_index); |
| 748 | spin_unlock_irqrestore(&xhci->lock, flags); |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 749 | } else { |
Sarah Sharp | b10de14 | 2009-04-27 19:58:50 -0700 | [diff] [blame] | 750 | ret = -EINVAL; |
Sarah Sharp | 2d3f1fa | 2009-08-07 14:04:49 -0700 | [diff] [blame] | 751 | } |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 752 | exit: |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 753 | return ret; |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 754 | dying: |
| 755 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for " |
| 756 | "non-responsive xHCI host.\n", |
| 757 | urb->ep->desc.bEndpointAddress, urb); |
| 758 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 759 | return -ESHUTDOWN; |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 760 | } |
| 761 | |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 762 | /* |
| 763 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop |
| 764 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC |
| 765 | * should pick up where it left off in the TD, unless a Set Transfer Ring |
| 766 | * Dequeue Pointer is issued. |
| 767 | * |
| 768 | * The TRBs that make up the buffers for the canceled URB will be "removed" from |
| 769 | * the ring. Since the ring is a contiguous structure, they can't be physically |
| 770 | * removed. Instead, there are two options: |
| 771 | * |
| 772 | * 1) If the HC is in the middle of processing the URB to be canceled, we |
| 773 | * simply move the ring's dequeue pointer past those TRBs using the Set |
| 774 | * Transfer Ring Dequeue Pointer command. This will be the common case, |
| 775 | * when drivers timeout on the last submitted URB and attempt to cancel. |
| 776 | * |
| 777 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a |
| 778 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The |
| 779 | * HC will need to invalidate the any TRBs it has cached after the stop |
| 780 | * endpoint command, as noted in the xHCI 0.95 errata. |
| 781 | * |
| 782 | * 3) The TD may have completed by the time the Stop Endpoint Command |
| 783 | * completes, so software needs to handle that case too. |
| 784 | * |
| 785 | * This function should protect against the TD enqueueing code ringing the |
| 786 | * doorbell while this code is waiting for a Stop Endpoint command to complete. |
| 787 | * It also needs to account for multiple cancellations on happening at the same |
| 788 | * time for the same endpoint. |
| 789 | * |
| 790 | * Note that this function can be called in any context, or so says |
| 791 | * usb_hcd_unlink_urb() |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 792 | */ |
| 793 | int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 794 | { |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 795 | unsigned long flags; |
| 796 | int ret; |
Sarah Sharp | e34b2fb | 2009-09-28 17:21:37 -0700 | [diff] [blame] | 797 | u32 temp; |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 798 | struct xhci_hcd *xhci; |
| 799 | struct xhci_td *td; |
| 800 | unsigned int ep_index; |
| 801 | struct xhci_ring *ep_ring; |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 802 | struct xhci_virt_ep *ep; |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 803 | |
| 804 | xhci = hcd_to_xhci(hcd); |
| 805 | spin_lock_irqsave(&xhci->lock, flags); |
| 806 | /* Make sure the URB hasn't completed or been unlinked already */ |
| 807 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 808 | if (ret || !urb->hcpriv) |
| 809 | goto done; |
Sarah Sharp | e34b2fb | 2009-09-28 17:21:37 -0700 | [diff] [blame] | 810 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
| 811 | if (temp == 0xffffffff) { |
| 812 | xhci_dbg(xhci, "HW died, freeing TD.\n"); |
| 813 | td = (struct xhci_td *) urb->hcpriv; |
| 814 | |
| 815 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 816 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 817 | usb_hcd_giveback_urb(xhci_to_hcd(xhci), urb, -ESHUTDOWN); |
| 818 | kfree(td); |
| 819 | return ret; |
| 820 | } |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 821 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
| 822 | xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " |
| 823 | "non-responsive xHCI host.\n", |
| 824 | urb->ep->desc.bEndpointAddress, urb); |
| 825 | /* Let the stop endpoint command watchdog timer (which set this |
| 826 | * state) finish cleaning up the endpoint TD lists. We must |
| 827 | * have caught it in the middle of dropping a lock and giving |
| 828 | * back an URB. |
| 829 | */ |
| 830 | goto done; |
| 831 | } |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 832 | |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 833 | xhci_dbg(xhci, "Cancel URB %p\n", urb); |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 834 | xhci_dbg(xhci, "Event ring:\n"); |
| 835 | xhci_debug_ring(xhci, xhci->event_ring); |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 836 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 837 | ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index]; |
Sarah Sharp | e9df17e | 2010-04-02 15:34:43 -0700 | [diff] [blame] | 838 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
| 839 | if (!ep_ring) { |
| 840 | ret = -EINVAL; |
| 841 | goto done; |
| 842 | } |
| 843 | |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 844 | xhci_dbg(xhci, "Endpoint ring:\n"); |
| 845 | xhci_debug_ring(xhci, ep_ring); |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 846 | td = (struct xhci_td *) urb->hcpriv; |
| 847 | |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 848 | list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 849 | /* Queue a stop endpoint command, but only if this is |
| 850 | * the first cancellation to be handled. |
| 851 | */ |
Sarah Sharp | 678539c | 2009-10-27 10:55:52 -0700 | [diff] [blame] | 852 | if (!(ep->ep_state & EP_HALT_PENDING)) { |
| 853 | ep->ep_state |= EP_HALT_PENDING; |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 854 | ep->stop_cmds_pending++; |
| 855 | ep->stop_cmd_timer.expires = jiffies + |
| 856 | XHCI_STOP_EP_CMD_TIMEOUT * HZ; |
| 857 | add_timer(&ep->stop_cmd_timer); |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 858 | xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index); |
| 859 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | ae63674 | 2009-04-29 19:02:31 -0700 | [diff] [blame] | 860 | } |
| 861 | done: |
| 862 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 863 | return ret; |
Sarah Sharp | d0e96f5a | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 864 | } |
| 865 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 866 | /* Drop an endpoint from a new bandwidth configuration for this device. |
| 867 | * Only one call to this function is allowed per endpoint before |
| 868 | * check_bandwidth() or reset_bandwidth() must be called. |
| 869 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will |
| 870 | * add the endpoint to the schedule with possibly new parameters denoted by a |
| 871 | * different endpoint descriptor in usb_host_endpoint. |
| 872 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is |
| 873 | * not allowed. |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 874 | * |
| 875 | * The USB core will not allow URBs to be queued to an endpoint that is being |
| 876 | * disabled, so there's no need for mutual exclusion to protect |
| 877 | * the xhci->devs[slot_id] structure. |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 878 | */ |
| 879 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, |
| 880 | struct usb_host_endpoint *ep) |
| 881 | { |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 882 | struct xhci_hcd *xhci; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 883 | struct xhci_container_ctx *in_ctx, *out_ctx; |
| 884 | struct xhci_input_control_ctx *ctrl_ctx; |
| 885 | struct xhci_slot_ctx *slot_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 886 | unsigned int last_ctx; |
| 887 | unsigned int ep_index; |
| 888 | struct xhci_ep_ctx *ep_ctx; |
| 889 | u32 drop_flag; |
| 890 | u32 new_add_flags, new_drop_flags, new_slot_info; |
| 891 | int ret; |
| 892 | |
| 893 | ret = xhci_check_args(hcd, udev, ep, 1, __func__); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 894 | if (ret <= 0) |
| 895 | return ret; |
| 896 | xhci = hcd_to_xhci(hcd); |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 897 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 898 | |
| 899 | drop_flag = xhci_get_endpoint_flag(&ep->desc); |
| 900 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { |
| 901 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", |
| 902 | __func__, drop_flag); |
| 903 | return 0; |
| 904 | } |
| 905 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 906 | if (!xhci->devs || !xhci->devs[udev->slot_id]) { |
| 907 | xhci_warn(xhci, "xHCI %s called with unaddressed device\n", |
| 908 | __func__); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 909 | return -EINVAL; |
| 910 | } |
| 911 | |
| 912 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 913 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
| 914 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 915 | ep_index = xhci_get_endpoint_index(&ep->desc); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 916 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 917 | /* If the HC already knows the endpoint is disabled, |
| 918 | * or the HCD has noted it is disabled, ignore this request |
| 919 | */ |
| 920 | if ((ep_ctx->ep_info & EP_STATE_MASK) == EP_STATE_DISABLED || |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 921 | ctrl_ctx->drop_flags & xhci_get_endpoint_flag(&ep->desc)) { |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 922 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", |
| 923 | __func__, ep); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 924 | return 0; |
| 925 | } |
| 926 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 927 | ctrl_ctx->drop_flags |= drop_flag; |
| 928 | new_drop_flags = ctrl_ctx->drop_flags; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 929 | |
Sarah Sharp | 0a023c6 | 2009-09-18 08:55:12 -0700 | [diff] [blame] | 930 | ctrl_ctx->add_flags &= ~drop_flag; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 931 | new_add_flags = ctrl_ctx->add_flags; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 932 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 933 | last_ctx = xhci_last_valid_endpoint(ctrl_ctx->add_flags); |
| 934 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 935 | /* Update the last valid endpoint context, if we deleted the last one */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 936 | if ((slot_ctx->dev_info & LAST_CTX_MASK) > LAST_CTX(last_ctx)) { |
| 937 | slot_ctx->dev_info &= ~LAST_CTX_MASK; |
| 938 | slot_ctx->dev_info |= LAST_CTX(last_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 939 | } |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 940 | new_slot_info = slot_ctx->dev_info; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 941 | |
| 942 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); |
| 943 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 944 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
| 945 | (unsigned int) ep->desc.bEndpointAddress, |
| 946 | udev->slot_id, |
| 947 | (unsigned int) new_drop_flags, |
| 948 | (unsigned int) new_add_flags, |
| 949 | (unsigned int) new_slot_info); |
| 950 | return 0; |
| 951 | } |
| 952 | |
| 953 | /* Add an endpoint to a new possible bandwidth configuration for this device. |
| 954 | * Only one call to this function is allowed per endpoint before |
| 955 | * check_bandwidth() or reset_bandwidth() must be called. |
| 956 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will |
| 957 | * add the endpoint to the schedule with possibly new parameters denoted by a |
| 958 | * different endpoint descriptor in usb_host_endpoint. |
| 959 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is |
| 960 | * not allowed. |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 961 | * |
| 962 | * The USB core will not allow URBs to be queued to an endpoint until the |
| 963 | * configuration or alt setting is installed in the device, so there's no need |
| 964 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 965 | */ |
| 966 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, |
| 967 | struct usb_host_endpoint *ep) |
| 968 | { |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 969 | struct xhci_hcd *xhci; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 970 | struct xhci_container_ctx *in_ctx, *out_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 971 | unsigned int ep_index; |
| 972 | struct xhci_ep_ctx *ep_ctx; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 973 | struct xhci_slot_ctx *slot_ctx; |
| 974 | struct xhci_input_control_ctx *ctrl_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 975 | u32 added_ctxs; |
| 976 | unsigned int last_ctx; |
| 977 | u32 new_add_flags, new_drop_flags, new_slot_info; |
| 978 | int ret = 0; |
| 979 | |
| 980 | ret = xhci_check_args(hcd, udev, ep, 1, __func__); |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 981 | if (ret <= 0) { |
| 982 | /* So we won't queue a reset ep command for a root hub */ |
| 983 | ep->hcpriv = NULL; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 984 | return ret; |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 985 | } |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 986 | xhci = hcd_to_xhci(hcd); |
| 987 | |
| 988 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); |
| 989 | last_ctx = xhci_last_valid_endpoint(added_ctxs); |
| 990 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { |
| 991 | /* FIXME when we have to issue an evaluate endpoint command to |
| 992 | * deal with ep0 max packet size changing once we get the |
| 993 | * descriptors |
| 994 | */ |
| 995 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", |
| 996 | __func__, added_ctxs); |
| 997 | return 0; |
| 998 | } |
| 999 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1000 | if (!xhci->devs || !xhci->devs[udev->slot_id]) { |
| 1001 | xhci_warn(xhci, "xHCI %s called with unaddressed device\n", |
| 1002 | __func__); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1003 | return -EINVAL; |
| 1004 | } |
| 1005 | |
| 1006 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1007 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
| 1008 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1009 | ep_index = xhci_get_endpoint_index(&ep->desc); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1010 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1011 | /* If the HCD has already noted the endpoint is enabled, |
| 1012 | * ignore this request. |
| 1013 | */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1014 | if (ctrl_ctx->add_flags & xhci_get_endpoint_flag(&ep->desc)) { |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 1015 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
| 1016 | __func__, ep); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1017 | return 0; |
| 1018 | } |
| 1019 | |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 1020 | /* |
| 1021 | * Configuration and alternate setting changes must be done in |
| 1022 | * process context, not interrupt context (or so documenation |
| 1023 | * for usb_set_interface() and usb_set_configuration() claim). |
| 1024 | */ |
| 1025 | if (xhci_endpoint_init(xhci, xhci->devs[udev->slot_id], |
Oliver Neukum | 319c3ea | 2009-12-16 19:43:59 +0100 | [diff] [blame] | 1026 | udev, ep, GFP_NOIO) < 0) { |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1027 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
| 1028 | __func__, ep->desc.bEndpointAddress); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1029 | return -ENOMEM; |
| 1030 | } |
| 1031 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1032 | ctrl_ctx->add_flags |= added_ctxs; |
| 1033 | new_add_flags = ctrl_ctx->add_flags; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1034 | |
| 1035 | /* If xhci_endpoint_disable() was called for this endpoint, but the |
| 1036 | * xHC hasn't been notified yet through the check_bandwidth() call, |
| 1037 | * this re-adds a new state for the endpoint from the new endpoint |
| 1038 | * descriptors. We must drop and re-add this endpoint, so we leave the |
| 1039 | * drop flags alone. |
| 1040 | */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1041 | new_drop_flags = ctrl_ctx->drop_flags; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1042 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1043 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1044 | /* Update the last valid endpoint context, if we just added one past */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1045 | if ((slot_ctx->dev_info & LAST_CTX_MASK) < LAST_CTX(last_ctx)) { |
| 1046 | slot_ctx->dev_info &= ~LAST_CTX_MASK; |
| 1047 | slot_ctx->dev_info |= LAST_CTX(last_ctx); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1048 | } |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1049 | new_slot_info = slot_ctx->dev_info; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1050 | |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1051 | /* Store the usb_device pointer for later use */ |
| 1052 | ep->hcpriv = udev; |
| 1053 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1054 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
| 1055 | (unsigned int) ep->desc.bEndpointAddress, |
| 1056 | udev->slot_id, |
| 1057 | (unsigned int) new_drop_flags, |
| 1058 | (unsigned int) new_add_flags, |
| 1059 | (unsigned int) new_slot_info); |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1063 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1064 | { |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1065 | struct xhci_input_control_ctx *ctrl_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1066 | struct xhci_ep_ctx *ep_ctx; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1067 | struct xhci_slot_ctx *slot_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1068 | int i; |
| 1069 | |
| 1070 | /* When a device's add flag and drop flag are zero, any subsequent |
| 1071 | * configure endpoint command will leave that endpoint's state |
| 1072 | * untouched. Make sure we don't leave any old state in the input |
| 1073 | * endpoint contexts. |
| 1074 | */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1075 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
| 1076 | ctrl_ctx->drop_flags = 0; |
| 1077 | ctrl_ctx->add_flags = 0; |
| 1078 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
| 1079 | slot_ctx->dev_info &= ~LAST_CTX_MASK; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1080 | /* Endpoint 0 is always valid */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1081 | slot_ctx->dev_info |= LAST_CTX(1); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1082 | for (i = 1; i < 31; ++i) { |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1083 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1084 | ep_ctx->ep_info = 0; |
| 1085 | ep_ctx->ep_info2 = 0; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 1086 | ep_ctx->deq = 0; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1087 | ep_ctx->tx_info = 0; |
| 1088 | } |
| 1089 | } |
| 1090 | |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1091 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1092 | struct usb_device *udev, int *cmd_status) |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1093 | { |
| 1094 | int ret; |
| 1095 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1096 | switch (*cmd_status) { |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1097 | case COMP_ENOMEM: |
| 1098 | dev_warn(&udev->dev, "Not enough host controller resources " |
| 1099 | "for new device state.\n"); |
| 1100 | ret = -ENOMEM; |
| 1101 | /* FIXME: can we allocate more resources for the HC? */ |
| 1102 | break; |
| 1103 | case COMP_BW_ERR: |
| 1104 | dev_warn(&udev->dev, "Not enough bandwidth " |
| 1105 | "for new device state.\n"); |
| 1106 | ret = -ENOSPC; |
| 1107 | /* FIXME: can we go back to the old state? */ |
| 1108 | break; |
| 1109 | case COMP_TRB_ERR: |
| 1110 | /* the HCD set up something wrong */ |
| 1111 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " |
| 1112 | "add flag = 1, " |
| 1113 | "and endpoint is not disabled.\n"); |
| 1114 | ret = -EINVAL; |
| 1115 | break; |
| 1116 | case COMP_SUCCESS: |
| 1117 | dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); |
| 1118 | ret = 0; |
| 1119 | break; |
| 1120 | default: |
| 1121 | xhci_err(xhci, "ERROR: unexpected command completion " |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1122 | "code 0x%x.\n", *cmd_status); |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1123 | ret = -EINVAL; |
| 1124 | break; |
| 1125 | } |
| 1126 | return ret; |
| 1127 | } |
| 1128 | |
| 1129 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1130 | struct usb_device *udev, int *cmd_status) |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1131 | { |
| 1132 | int ret; |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1133 | struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1134 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1135 | switch (*cmd_status) { |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1136 | case COMP_EINVAL: |
| 1137 | dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " |
| 1138 | "context command.\n"); |
| 1139 | ret = -EINVAL; |
| 1140 | break; |
| 1141 | case COMP_EBADSLT: |
| 1142 | dev_warn(&udev->dev, "WARN: slot not enabled for" |
| 1143 | "evaluate context command.\n"); |
| 1144 | case COMP_CTX_STATE: |
| 1145 | dev_warn(&udev->dev, "WARN: invalid context state for " |
| 1146 | "evaluate context command.\n"); |
| 1147 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1); |
| 1148 | ret = -EINVAL; |
| 1149 | break; |
| 1150 | case COMP_SUCCESS: |
| 1151 | dev_dbg(&udev->dev, "Successful evaluate context command\n"); |
| 1152 | ret = 0; |
| 1153 | break; |
| 1154 | default: |
| 1155 | xhci_err(xhci, "ERROR: unexpected command completion " |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1156 | "code 0x%x.\n", *cmd_status); |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1157 | ret = -EINVAL; |
| 1158 | break; |
| 1159 | } |
| 1160 | return ret; |
| 1161 | } |
| 1162 | |
| 1163 | /* Issue a configure endpoint command or evaluate context command |
| 1164 | * and wait for it to finish. |
| 1165 | */ |
| 1166 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1167 | struct usb_device *udev, |
| 1168 | struct xhci_command *command, |
| 1169 | bool ctx_change, bool must_succeed) |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1170 | { |
| 1171 | int ret; |
| 1172 | int timeleft; |
| 1173 | unsigned long flags; |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1174 | struct xhci_container_ctx *in_ctx; |
| 1175 | struct completion *cmd_completion; |
| 1176 | int *cmd_status; |
| 1177 | struct xhci_virt_device *virt_dev; |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1178 | |
| 1179 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1180 | virt_dev = xhci->devs[udev->slot_id]; |
| 1181 | if (command) { |
| 1182 | in_ctx = command->in_ctx; |
| 1183 | cmd_completion = command->completion; |
| 1184 | cmd_status = &command->status; |
| 1185 | command->command_trb = xhci->cmd_ring->enqueue; |
| 1186 | list_add_tail(&command->cmd_list, &virt_dev->cmd_list); |
| 1187 | } else { |
| 1188 | in_ctx = virt_dev->in_ctx; |
| 1189 | cmd_completion = &virt_dev->cmd_completion; |
| 1190 | cmd_status = &virt_dev->cmd_status; |
| 1191 | } |
Andiry Xu | 1d68064 | 2010-03-12 17:10:04 +0800 | [diff] [blame] | 1192 | init_completion(cmd_completion); |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1193 | |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1194 | if (!ctx_change) |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1195 | ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, |
| 1196 | udev->slot_id, must_succeed); |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1197 | else |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1198 | ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1199 | udev->slot_id); |
| 1200 | if (ret < 0) { |
Sarah Sharp | c01591b | 2009-12-09 15:58:58 -0800 | [diff] [blame] | 1201 | if (command) |
| 1202 | list_del(&command->cmd_list); |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1203 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1204 | xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); |
| 1205 | return -ENOMEM; |
| 1206 | } |
| 1207 | xhci_ring_cmd_db(xhci); |
| 1208 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1209 | |
| 1210 | /* Wait for the configure endpoint command to complete */ |
| 1211 | timeleft = wait_for_completion_interruptible_timeout( |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1212 | cmd_completion, |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1213 | USB_CTRL_SET_TIMEOUT); |
| 1214 | if (timeleft <= 0) { |
| 1215 | xhci_warn(xhci, "%s while waiting for %s command\n", |
| 1216 | timeleft == 0 ? "Timeout" : "Signal", |
| 1217 | ctx_change == 0 ? |
| 1218 | "configure endpoint" : |
| 1219 | "evaluate context"); |
| 1220 | /* FIXME cancel the configure endpoint command */ |
| 1221 | return -ETIME; |
| 1222 | } |
| 1223 | |
| 1224 | if (!ctx_change) |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1225 | return xhci_configure_endpoint_result(xhci, udev, cmd_status); |
| 1226 | return xhci_evaluate_context_result(xhci, udev, cmd_status); |
Sarah Sharp | f2217e8 | 2009-08-07 14:04:43 -0700 | [diff] [blame] | 1227 | } |
| 1228 | |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 1229 | /* Called after one or more calls to xhci_add_endpoint() or |
| 1230 | * xhci_drop_endpoint(). If this call fails, the USB core is expected |
| 1231 | * to call xhci_reset_bandwidth(). |
| 1232 | * |
| 1233 | * Since we are in the middle of changing either configuration or |
| 1234 | * installing a new alt setting, the USB core won't allow URBs to be |
| 1235 | * enqueued for any endpoint on the old config or interface. Nothing |
| 1236 | * else should be touching the xhci->devs[slot_id] structure, so we |
| 1237 | * don't need to take the xhci->lock for manipulating that. |
| 1238 | */ |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1239 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
| 1240 | { |
| 1241 | int i; |
| 1242 | int ret = 0; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1243 | struct xhci_hcd *xhci; |
| 1244 | struct xhci_virt_device *virt_dev; |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1245 | struct xhci_input_control_ctx *ctrl_ctx; |
| 1246 | struct xhci_slot_ctx *slot_ctx; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1247 | |
| 1248 | ret = xhci_check_args(hcd, udev, NULL, 0, __func__); |
| 1249 | if (ret <= 0) |
| 1250 | return ret; |
| 1251 | xhci = hcd_to_xhci(hcd); |
| 1252 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1253 | if (!udev->slot_id || !xhci->devs || !xhci->devs[udev->slot_id]) { |
| 1254 | xhci_warn(xhci, "xHCI %s called with unaddressed device\n", |
| 1255 | __func__); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1256 | return -EINVAL; |
| 1257 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 1258 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1259 | virt_dev = xhci->devs[udev->slot_id]; |
| 1260 | |
| 1261 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1262 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
| 1263 | ctrl_ctx->add_flags |= SLOT_FLAG; |
| 1264 | ctrl_ctx->add_flags &= ~EP0_FLAG; |
| 1265 | ctrl_ctx->drop_flags &= ~SLOT_FLAG; |
| 1266 | ctrl_ctx->drop_flags &= ~EP0_FLAG; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1267 | xhci_dbg(xhci, "New Input Control Context:\n"); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1268 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
| 1269 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, |
| 1270 | LAST_CTX_TO_EP_NUM(slot_ctx->dev_info)); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1271 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1272 | ret = xhci_configure_endpoint(xhci, udev, NULL, |
| 1273 | false, false); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1274 | if (ret) { |
| 1275 | /* Callee should call reset_bandwidth() */ |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1276 | return ret; |
| 1277 | } |
| 1278 | |
| 1279 | xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1280 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, |
| 1281 | LAST_CTX_TO_EP_NUM(slot_ctx->dev_info)); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1282 | |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1283 | xhci_zero_in_ctx(xhci, virt_dev); |
Sarah Sharp | 74f9fe2 | 2009-12-03 09:44:29 -0800 | [diff] [blame] | 1284 | /* Install new rings and free or cache any old rings */ |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1285 | for (i = 1; i < 31; ++i) { |
Sarah Sharp | 74f9fe2 | 2009-12-03 09:44:29 -0800 | [diff] [blame] | 1286 | if (!virt_dev->eps[i].new_ring) |
| 1287 | continue; |
| 1288 | /* Only cache or free the old ring if it exists. |
| 1289 | * It may not if this is the first add of an endpoint. |
| 1290 | */ |
| 1291 | if (virt_dev->eps[i].ring) { |
Sarah Sharp | 412566b | 2009-12-09 15:59:01 -0800 | [diff] [blame] | 1292 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1293 | } |
Sarah Sharp | 74f9fe2 | 2009-12-03 09:44:29 -0800 | [diff] [blame] | 1294 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
| 1295 | virt_dev->eps[i].new_ring = NULL; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1298 | return ret; |
| 1299 | } |
| 1300 | |
| 1301 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
| 1302 | { |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1303 | struct xhci_hcd *xhci; |
| 1304 | struct xhci_virt_device *virt_dev; |
| 1305 | int i, ret; |
| 1306 | |
| 1307 | ret = xhci_check_args(hcd, udev, NULL, 0, __func__); |
| 1308 | if (ret <= 0) |
| 1309 | return; |
| 1310 | xhci = hcd_to_xhci(hcd); |
| 1311 | |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1312 | if (!xhci->devs || !xhci->devs[udev->slot_id]) { |
| 1313 | xhci_warn(xhci, "xHCI %s called with unaddressed device\n", |
| 1314 | __func__); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1315 | return; |
| 1316 | } |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 1317 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1318 | virt_dev = xhci->devs[udev->slot_id]; |
| 1319 | /* Free any rings allocated for added endpoints */ |
| 1320 | for (i = 0; i < 31; ++i) { |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1321 | if (virt_dev->eps[i].new_ring) { |
| 1322 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); |
| 1323 | virt_dev->eps[i].new_ring = NULL; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1324 | } |
| 1325 | } |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 1326 | xhci_zero_in_ctx(xhci, virt_dev); |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
Sarah Sharp | 5270b95 | 2009-09-04 10:53:11 -0700 | [diff] [blame] | 1329 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1330 | struct xhci_container_ctx *in_ctx, |
| 1331 | struct xhci_container_ctx *out_ctx, |
| 1332 | u32 add_flags, u32 drop_flags) |
Sarah Sharp | 5270b95 | 2009-09-04 10:53:11 -0700 | [diff] [blame] | 1333 | { |
| 1334 | struct xhci_input_control_ctx *ctrl_ctx; |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1335 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
Sarah Sharp | 5270b95 | 2009-09-04 10:53:11 -0700 | [diff] [blame] | 1336 | ctrl_ctx->add_flags = add_flags; |
| 1337 | ctrl_ctx->drop_flags = drop_flags; |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1338 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
Sarah Sharp | 5270b95 | 2009-09-04 10:53:11 -0700 | [diff] [blame] | 1339 | ctrl_ctx->add_flags |= SLOT_FLAG; |
| 1340 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1341 | xhci_dbg(xhci, "Input Context:\n"); |
| 1342 | xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags)); |
Sarah Sharp | 5270b95 | 2009-09-04 10:53:11 -0700 | [diff] [blame] | 1343 | } |
| 1344 | |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1345 | void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, |
| 1346 | unsigned int slot_id, unsigned int ep_index, |
| 1347 | struct xhci_dequeue_state *deq_state) |
| 1348 | { |
| 1349 | struct xhci_container_ctx *in_ctx; |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1350 | struct xhci_ep_ctx *ep_ctx; |
| 1351 | u32 added_ctxs; |
| 1352 | dma_addr_t addr; |
| 1353 | |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1354 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
| 1355 | xhci->devs[slot_id]->out_ctx, ep_index); |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1356 | in_ctx = xhci->devs[slot_id]->in_ctx; |
| 1357 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); |
| 1358 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, |
| 1359 | deq_state->new_deq_ptr); |
| 1360 | if (addr == 0) { |
| 1361 | xhci_warn(xhci, "WARN Cannot submit config ep after " |
| 1362 | "reset ep command\n"); |
| 1363 | xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n", |
| 1364 | deq_state->new_deq_seg, |
| 1365 | deq_state->new_deq_ptr); |
| 1366 | return; |
| 1367 | } |
| 1368 | ep_ctx->deq = addr | deq_state->new_cycle_state; |
| 1369 | |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1370 | added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); |
Sarah Sharp | 913a8a3 | 2009-09-04 10:53:13 -0700 | [diff] [blame] | 1371 | xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, |
| 1372 | xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1373 | } |
| 1374 | |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1375 | void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1376 | struct usb_device *udev, unsigned int ep_index) |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1377 | { |
| 1378 | struct xhci_dequeue_state deq_state; |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1379 | struct xhci_virt_ep *ep; |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1380 | |
| 1381 | xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1382 | ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1383 | /* We need to move the HW's dequeue pointer past this TD, |
| 1384 | * or it will attempt to resend it on the next doorbell ring. |
| 1385 | */ |
| 1386 | xhci_find_new_dequeue_state(xhci, udev->slot_id, |
Sarah Sharp | e9df17e | 2010-04-02 15:34:43 -0700 | [diff] [blame] | 1387 | ep_index, ep->stopped_stream, ep->stopped_td, |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1388 | &deq_state); |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1389 | |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1390 | /* HW with the reset endpoint quirk will use the saved dequeue state to |
| 1391 | * issue a configure endpoint command later. |
| 1392 | */ |
| 1393 | if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { |
| 1394 | xhci_dbg(xhci, "Queueing new dequeue state\n"); |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1395 | xhci_queue_new_dequeue_state(xhci, udev->slot_id, |
Sarah Sharp | e9df17e | 2010-04-02 15:34:43 -0700 | [diff] [blame] | 1396 | ep_index, ep->stopped_stream, &deq_state); |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1397 | } else { |
| 1398 | /* Better hope no one uses the input context between now and the |
| 1399 | * reset endpoint completion! |
Sarah Sharp | e9df17e | 2010-04-02 15:34:43 -0700 | [diff] [blame] | 1400 | * XXX: No idea how this hardware will react when stream rings |
| 1401 | * are enabled. |
Sarah Sharp | ac9d8fe | 2009-08-07 14:04:55 -0700 | [diff] [blame] | 1402 | */ |
| 1403 | xhci_dbg(xhci, "Setting up input context for " |
| 1404 | "configure endpoint command\n"); |
| 1405 | xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, |
| 1406 | ep_index, &deq_state); |
| 1407 | } |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1408 | } |
| 1409 | |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1410 | /* Deal with stalled endpoints. The core should have sent the control message |
| 1411 | * to clear the halt condition. However, we need to make the xHCI hardware |
| 1412 | * reset its sequence number, since a device will expect a sequence number of |
| 1413 | * zero after the halt condition is cleared. |
| 1414 | * Context: in_interrupt |
| 1415 | */ |
| 1416 | void xhci_endpoint_reset(struct usb_hcd *hcd, |
| 1417 | struct usb_host_endpoint *ep) |
| 1418 | { |
| 1419 | struct xhci_hcd *xhci; |
| 1420 | struct usb_device *udev; |
| 1421 | unsigned int ep_index; |
| 1422 | unsigned long flags; |
| 1423 | int ret; |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1424 | struct xhci_virt_ep *virt_ep; |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1425 | |
| 1426 | xhci = hcd_to_xhci(hcd); |
| 1427 | udev = (struct usb_device *) ep->hcpriv; |
| 1428 | /* Called with a root hub endpoint (or an endpoint that wasn't added |
| 1429 | * with xhci_add_endpoint() |
| 1430 | */ |
| 1431 | if (!ep->hcpriv) |
| 1432 | return; |
| 1433 | ep_index = xhci_get_endpoint_index(&ep->desc); |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1434 | virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
| 1435 | if (!virt_ep->stopped_td) { |
Sarah Sharp | c92bcfa | 2009-07-27 12:05:21 -0700 | [diff] [blame] | 1436 | xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", |
| 1437 | ep->desc.bEndpointAddress); |
| 1438 | return; |
| 1439 | } |
Sarah Sharp | 82d1009 | 2009-08-07 14:04:52 -0700 | [diff] [blame] | 1440 | if (usb_endpoint_xfer_control(&ep->desc)) { |
| 1441 | xhci_dbg(xhci, "Control endpoint stall already handled.\n"); |
| 1442 | return; |
| 1443 | } |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1444 | |
| 1445 | xhci_dbg(xhci, "Queueing reset endpoint command\n"); |
| 1446 | spin_lock_irqsave(&xhci->lock, flags); |
| 1447 | ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); |
Sarah Sharp | c92bcfa | 2009-07-27 12:05:21 -0700 | [diff] [blame] | 1448 | /* |
| 1449 | * Can't change the ring dequeue pointer until it's transitioned to the |
| 1450 | * stopped state, which is only upon a successful reset endpoint |
| 1451 | * command. Better hope that last command worked! |
| 1452 | */ |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1453 | if (!ret) { |
Sarah Sharp | 63a0d9a | 2009-09-04 10:53:09 -0700 | [diff] [blame] | 1454 | xhci_cleanup_stalled_ring(xhci, udev, ep_index); |
| 1455 | kfree(virt_ep->stopped_td); |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1456 | xhci_ring_cmd_db(xhci); |
| 1457 | } |
Sarah Sharp | 1624ae1 | 2010-05-06 13:40:08 -0700 | [diff] [blame] | 1458 | virt_ep->stopped_td = NULL; |
| 1459 | virt_ep->stopped_trb = NULL; |
Sarah Sharp | 5e5cf6f | 2010-05-06 13:40:18 -0700 | [diff] [blame] | 1460 | virt_ep->stopped_stream = 0; |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 1461 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1462 | |
| 1463 | if (ret) |
| 1464 | xhci_warn(xhci, "FIXME allocate a new ring segment\n"); |
| 1465 | } |
| 1466 | |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1467 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
| 1468 | struct usb_device *udev, struct usb_host_endpoint *ep, |
| 1469 | unsigned int slot_id) |
| 1470 | { |
| 1471 | int ret; |
| 1472 | unsigned int ep_index; |
| 1473 | unsigned int ep_state; |
| 1474 | |
| 1475 | if (!ep) |
| 1476 | return -EINVAL; |
| 1477 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, __func__); |
| 1478 | if (ret <= 0) |
| 1479 | return -EINVAL; |
Alan Stern | 842f169 | 2010-04-30 12:44:46 -0400 | [diff] [blame] | 1480 | if (ep->ss_ep_comp.bmAttributes == 0) { |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1481 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
| 1482 | " descriptor for ep 0x%x does not support streams\n", |
| 1483 | ep->desc.bEndpointAddress); |
| 1484 | return -EINVAL; |
| 1485 | } |
| 1486 | |
| 1487 | ep_index = xhci_get_endpoint_index(&ep->desc); |
| 1488 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; |
| 1489 | if (ep_state & EP_HAS_STREAMS || |
| 1490 | ep_state & EP_GETTING_STREAMS) { |
| 1491 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " |
| 1492 | "already has streams set up.\n", |
| 1493 | ep->desc.bEndpointAddress); |
| 1494 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " |
| 1495 | "dynamic stream context array reallocation.\n"); |
| 1496 | return -EINVAL; |
| 1497 | } |
| 1498 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { |
| 1499 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " |
| 1500 | "endpoint 0x%x; URBs are pending.\n", |
| 1501 | ep->desc.bEndpointAddress); |
| 1502 | return -EINVAL; |
| 1503 | } |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
| 1507 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, |
| 1508 | unsigned int *num_streams, unsigned int *num_stream_ctxs) |
| 1509 | { |
| 1510 | unsigned int max_streams; |
| 1511 | |
| 1512 | /* The stream context array size must be a power of two */ |
| 1513 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); |
| 1514 | /* |
| 1515 | * Find out how many primary stream array entries the host controller |
| 1516 | * supports. Later we may use secondary stream arrays (similar to 2nd |
| 1517 | * level page entries), but that's an optional feature for xHCI host |
| 1518 | * controllers. xHCs must support at least 4 stream IDs. |
| 1519 | */ |
| 1520 | max_streams = HCC_MAX_PSA(xhci->hcc_params); |
| 1521 | if (*num_stream_ctxs > max_streams) { |
| 1522 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", |
| 1523 | max_streams); |
| 1524 | *num_stream_ctxs = max_streams; |
| 1525 | *num_streams = max_streams; |
| 1526 | } |
| 1527 | } |
| 1528 | |
| 1529 | /* Returns an error code if one of the endpoint already has streams. |
| 1530 | * This does not change any data structures, it only checks and gathers |
| 1531 | * information. |
| 1532 | */ |
| 1533 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, |
| 1534 | struct usb_device *udev, |
| 1535 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 1536 | unsigned int *num_streams, u32 *changed_ep_bitmask) |
| 1537 | { |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1538 | unsigned int max_streams; |
| 1539 | unsigned int endpoint_flag; |
| 1540 | int i; |
| 1541 | int ret; |
| 1542 | |
| 1543 | for (i = 0; i < num_eps; i++) { |
| 1544 | ret = xhci_check_streams_endpoint(xhci, udev, |
| 1545 | eps[i], udev->slot_id); |
| 1546 | if (ret < 0) |
| 1547 | return ret; |
| 1548 | |
Alan Stern | 842f169 | 2010-04-30 12:44:46 -0400 | [diff] [blame] | 1549 | max_streams = USB_SS_MAX_STREAMS( |
| 1550 | eps[i]->ss_ep_comp.bmAttributes); |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1551 | if (max_streams < (*num_streams - 1)) { |
| 1552 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", |
| 1553 | eps[i]->desc.bEndpointAddress, |
| 1554 | max_streams); |
| 1555 | *num_streams = max_streams+1; |
| 1556 | } |
| 1557 | |
| 1558 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); |
| 1559 | if (*changed_ep_bitmask & endpoint_flag) |
| 1560 | return -EINVAL; |
| 1561 | *changed_ep_bitmask |= endpoint_flag; |
| 1562 | } |
| 1563 | return 0; |
| 1564 | } |
| 1565 | |
| 1566 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, |
| 1567 | struct usb_device *udev, |
| 1568 | struct usb_host_endpoint **eps, unsigned int num_eps) |
| 1569 | { |
| 1570 | u32 changed_ep_bitmask = 0; |
| 1571 | unsigned int slot_id; |
| 1572 | unsigned int ep_index; |
| 1573 | unsigned int ep_state; |
| 1574 | int i; |
| 1575 | |
| 1576 | slot_id = udev->slot_id; |
| 1577 | if (!xhci->devs[slot_id]) |
| 1578 | return 0; |
| 1579 | |
| 1580 | for (i = 0; i < num_eps; i++) { |
| 1581 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1582 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; |
| 1583 | /* Are streams already being freed for the endpoint? */ |
| 1584 | if (ep_state & EP_GETTING_NO_STREAMS) { |
| 1585 | xhci_warn(xhci, "WARN Can't disable streams for " |
| 1586 | "endpoint 0x%x\n, " |
| 1587 | "streams are being disabled already.", |
| 1588 | eps[i]->desc.bEndpointAddress); |
| 1589 | return 0; |
| 1590 | } |
| 1591 | /* Are there actually any streams to free? */ |
| 1592 | if (!(ep_state & EP_HAS_STREAMS) && |
| 1593 | !(ep_state & EP_GETTING_STREAMS)) { |
| 1594 | xhci_warn(xhci, "WARN Can't disable streams for " |
| 1595 | "endpoint 0x%x\n, " |
| 1596 | "streams are already disabled!", |
| 1597 | eps[i]->desc.bEndpointAddress); |
| 1598 | xhci_warn(xhci, "WARN xhci_free_streams() called " |
| 1599 | "with non-streams endpoint\n"); |
| 1600 | return 0; |
| 1601 | } |
| 1602 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); |
| 1603 | } |
| 1604 | return changed_ep_bitmask; |
| 1605 | } |
| 1606 | |
| 1607 | /* |
| 1608 | * The USB device drivers use this function (though the HCD interface in USB |
| 1609 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to |
| 1610 | * coordinate mass storage command queueing across multiple endpoints (basically |
| 1611 | * a stream ID == a task ID). |
| 1612 | * |
| 1613 | * Setting up streams involves allocating the same size stream context array |
| 1614 | * for each endpoint and issuing a configure endpoint command for all endpoints. |
| 1615 | * |
| 1616 | * Don't allow the call to succeed if one endpoint only supports one stream |
| 1617 | * (which means it doesn't support streams at all). |
| 1618 | * |
| 1619 | * Drivers may get less stream IDs than they asked for, if the host controller |
| 1620 | * hardware or endpoints claim they can't support the number of requested |
| 1621 | * stream IDs. |
| 1622 | */ |
| 1623 | int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
| 1624 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 1625 | unsigned int num_streams, gfp_t mem_flags) |
| 1626 | { |
| 1627 | int i, ret; |
| 1628 | struct xhci_hcd *xhci; |
| 1629 | struct xhci_virt_device *vdev; |
| 1630 | struct xhci_command *config_cmd; |
| 1631 | unsigned int ep_index; |
| 1632 | unsigned int num_stream_ctxs; |
| 1633 | unsigned long flags; |
| 1634 | u32 changed_ep_bitmask = 0; |
| 1635 | |
| 1636 | if (!eps) |
| 1637 | return -EINVAL; |
| 1638 | |
| 1639 | /* Add one to the number of streams requested to account for |
| 1640 | * stream 0 that is reserved for xHCI usage. |
| 1641 | */ |
| 1642 | num_streams += 1; |
| 1643 | xhci = hcd_to_xhci(hcd); |
| 1644 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", |
| 1645 | num_streams); |
| 1646 | |
| 1647 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
| 1648 | if (!config_cmd) { |
| 1649 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); |
| 1650 | return -ENOMEM; |
| 1651 | } |
| 1652 | |
| 1653 | /* Check to make sure all endpoints are not already configured for |
| 1654 | * streams. While we're at it, find the maximum number of streams that |
| 1655 | * all the endpoints will support and check for duplicate endpoints. |
| 1656 | */ |
| 1657 | spin_lock_irqsave(&xhci->lock, flags); |
| 1658 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, |
| 1659 | num_eps, &num_streams, &changed_ep_bitmask); |
| 1660 | if (ret < 0) { |
| 1661 | xhci_free_command(xhci, config_cmd); |
| 1662 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1663 | return ret; |
| 1664 | } |
| 1665 | if (num_streams <= 1) { |
| 1666 | xhci_warn(xhci, "WARN: endpoints can't handle " |
| 1667 | "more than one stream.\n"); |
| 1668 | xhci_free_command(xhci, config_cmd); |
| 1669 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1670 | return -EINVAL; |
| 1671 | } |
| 1672 | vdev = xhci->devs[udev->slot_id]; |
| 1673 | /* Mark each endpoint as being in transistion, so |
| 1674 | * xhci_urb_enqueue() will reject all URBs. |
| 1675 | */ |
| 1676 | for (i = 0; i < num_eps; i++) { |
| 1677 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1678 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; |
| 1679 | } |
| 1680 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1681 | |
| 1682 | /* Setup internal data structures and allocate HW data structures for |
| 1683 | * streams (but don't install the HW structures in the input context |
| 1684 | * until we're sure all memory allocation succeeded). |
| 1685 | */ |
| 1686 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); |
| 1687 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", |
| 1688 | num_stream_ctxs, num_streams); |
| 1689 | |
| 1690 | for (i = 0; i < num_eps; i++) { |
| 1691 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1692 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, |
| 1693 | num_stream_ctxs, |
| 1694 | num_streams, mem_flags); |
| 1695 | if (!vdev->eps[ep_index].stream_info) |
| 1696 | goto cleanup; |
| 1697 | /* Set maxPstreams in endpoint context and update deq ptr to |
| 1698 | * point to stream context array. FIXME |
| 1699 | */ |
| 1700 | } |
| 1701 | |
| 1702 | /* Set up the input context for a configure endpoint command. */ |
| 1703 | for (i = 0; i < num_eps; i++) { |
| 1704 | struct xhci_ep_ctx *ep_ctx; |
| 1705 | |
| 1706 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1707 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); |
| 1708 | |
| 1709 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, |
| 1710 | vdev->out_ctx, ep_index); |
| 1711 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, |
| 1712 | vdev->eps[ep_index].stream_info); |
| 1713 | } |
| 1714 | /* Tell the HW to drop its old copy of the endpoint context info |
| 1715 | * and add the updated copy from the input context. |
| 1716 | */ |
| 1717 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, |
| 1718 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); |
| 1719 | |
| 1720 | /* Issue and wait for the configure endpoint command */ |
| 1721 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, |
| 1722 | false, false); |
| 1723 | |
| 1724 | /* xHC rejected the configure endpoint command for some reason, so we |
| 1725 | * leave the old ring intact and free our internal streams data |
| 1726 | * structure. |
| 1727 | */ |
| 1728 | if (ret < 0) |
| 1729 | goto cleanup; |
| 1730 | |
| 1731 | spin_lock_irqsave(&xhci->lock, flags); |
| 1732 | for (i = 0; i < num_eps; i++) { |
| 1733 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1734 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; |
| 1735 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", |
| 1736 | udev->slot_id, ep_index); |
| 1737 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; |
| 1738 | } |
| 1739 | xhci_free_command(xhci, config_cmd); |
| 1740 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1741 | |
| 1742 | /* Subtract 1 for stream 0, which drivers can't use */ |
| 1743 | return num_streams - 1; |
| 1744 | |
| 1745 | cleanup: |
| 1746 | /* If it didn't work, free the streams! */ |
| 1747 | for (i = 0; i < num_eps; i++) { |
| 1748 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1749 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); |
Sarah Sharp | 8a00774 | 2010-04-30 15:37:56 -0700 | [diff] [blame] | 1750 | vdev->eps[ep_index].stream_info = NULL; |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1751 | /* FIXME Unset maxPstreams in endpoint context and |
| 1752 | * update deq ptr to point to normal string ring. |
| 1753 | */ |
| 1754 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; |
| 1755 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; |
| 1756 | xhci_endpoint_zero(xhci, vdev, eps[i]); |
| 1757 | } |
| 1758 | xhci_free_command(xhci, config_cmd); |
| 1759 | return -ENOMEM; |
| 1760 | } |
| 1761 | |
| 1762 | /* Transition the endpoint from using streams to being a "normal" endpoint |
| 1763 | * without streams. |
| 1764 | * |
| 1765 | * Modify the endpoint context state, submit a configure endpoint command, |
| 1766 | * and free all endpoint rings for streams if that completes successfully. |
| 1767 | */ |
| 1768 | int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
| 1769 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 1770 | gfp_t mem_flags) |
| 1771 | { |
| 1772 | int i, ret; |
| 1773 | struct xhci_hcd *xhci; |
| 1774 | struct xhci_virt_device *vdev; |
| 1775 | struct xhci_command *command; |
| 1776 | unsigned int ep_index; |
| 1777 | unsigned long flags; |
| 1778 | u32 changed_ep_bitmask; |
| 1779 | |
| 1780 | xhci = hcd_to_xhci(hcd); |
| 1781 | vdev = xhci->devs[udev->slot_id]; |
| 1782 | |
| 1783 | /* Set up a configure endpoint command to remove the streams rings */ |
| 1784 | spin_lock_irqsave(&xhci->lock, flags); |
| 1785 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, |
| 1786 | udev, eps, num_eps); |
| 1787 | if (changed_ep_bitmask == 0) { |
| 1788 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1789 | return -EINVAL; |
| 1790 | } |
| 1791 | |
| 1792 | /* Use the xhci_command structure from the first endpoint. We may have |
| 1793 | * allocated too many, but the driver may call xhci_free_streams() for |
| 1794 | * each endpoint it grouped into one call to xhci_alloc_streams(). |
| 1795 | */ |
| 1796 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); |
| 1797 | command = vdev->eps[ep_index].stream_info->free_streams_command; |
| 1798 | for (i = 0; i < num_eps; i++) { |
| 1799 | struct xhci_ep_ctx *ep_ctx; |
| 1800 | |
| 1801 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1802 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); |
| 1803 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= |
| 1804 | EP_GETTING_NO_STREAMS; |
| 1805 | |
| 1806 | xhci_endpoint_copy(xhci, command->in_ctx, |
| 1807 | vdev->out_ctx, ep_index); |
| 1808 | xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx, |
| 1809 | &vdev->eps[ep_index]); |
| 1810 | } |
| 1811 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, |
| 1812 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); |
| 1813 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1814 | |
| 1815 | /* Issue and wait for the configure endpoint command, |
| 1816 | * which must succeed. |
| 1817 | */ |
| 1818 | ret = xhci_configure_endpoint(xhci, udev, command, |
| 1819 | false, true); |
| 1820 | |
| 1821 | /* xHC rejected the configure endpoint command for some reason, so we |
| 1822 | * leave the streams rings intact. |
| 1823 | */ |
| 1824 | if (ret < 0) |
| 1825 | return ret; |
| 1826 | |
| 1827 | spin_lock_irqsave(&xhci->lock, flags); |
| 1828 | for (i = 0; i < num_eps; i++) { |
| 1829 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); |
| 1830 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); |
Sarah Sharp | 8a00774 | 2010-04-30 15:37:56 -0700 | [diff] [blame] | 1831 | vdev->eps[ep_index].stream_info = NULL; |
Sarah Sharp | 8df75f4 | 2010-04-02 15:34:16 -0700 | [diff] [blame] | 1832 | /* FIXME Unset maxPstreams in endpoint context and |
| 1833 | * update deq ptr to point to normal string ring. |
| 1834 | */ |
| 1835 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; |
| 1836 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; |
| 1837 | } |
| 1838 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1839 | |
| 1840 | return 0; |
| 1841 | } |
| 1842 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 1843 | /* |
Sarah Sharp | 2a8f82c | 2009-12-09 15:59:13 -0800 | [diff] [blame] | 1844 | * This submits a Reset Device Command, which will set the device state to 0, |
| 1845 | * set the device address to 0, and disable all the endpoints except the default |
| 1846 | * control endpoint. The USB core should come back and call |
| 1847 | * xhci_address_device(), and then re-set up the configuration. If this is |
| 1848 | * called because of a usb_reset_and_verify_device(), then the old alternate |
| 1849 | * settings will be re-installed through the normal bandwidth allocation |
| 1850 | * functions. |
| 1851 | * |
| 1852 | * Wait for the Reset Device command to finish. Remove all structures |
| 1853 | * associated with the endpoints that were disabled. Clear the input device |
| 1854 | * structure? Cache the rings? Reset the control endpoint 0 max packet size? |
| 1855 | */ |
| 1856 | int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev) |
| 1857 | { |
| 1858 | int ret, i; |
| 1859 | unsigned long flags; |
| 1860 | struct xhci_hcd *xhci; |
| 1861 | unsigned int slot_id; |
| 1862 | struct xhci_virt_device *virt_dev; |
| 1863 | struct xhci_command *reset_device_cmd; |
| 1864 | int timeleft; |
| 1865 | int last_freed_endpoint; |
| 1866 | |
| 1867 | ret = xhci_check_args(hcd, udev, NULL, 0, __func__); |
| 1868 | if (ret <= 0) |
| 1869 | return ret; |
| 1870 | xhci = hcd_to_xhci(hcd); |
| 1871 | slot_id = udev->slot_id; |
| 1872 | virt_dev = xhci->devs[slot_id]; |
| 1873 | if (!virt_dev) { |
| 1874 | xhci_dbg(xhci, "%s called with invalid slot ID %u\n", |
| 1875 | __func__, slot_id); |
| 1876 | return -EINVAL; |
| 1877 | } |
| 1878 | |
| 1879 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); |
| 1880 | /* Allocate the command structure that holds the struct completion. |
| 1881 | * Assume we're in process context, since the normal device reset |
| 1882 | * process has to wait for the device anyway. Storage devices are |
| 1883 | * reset as part of error handling, so use GFP_NOIO instead of |
| 1884 | * GFP_KERNEL. |
| 1885 | */ |
| 1886 | reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); |
| 1887 | if (!reset_device_cmd) { |
| 1888 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); |
| 1889 | return -ENOMEM; |
| 1890 | } |
| 1891 | |
| 1892 | /* Attempt to submit the Reset Device command to the command ring */ |
| 1893 | spin_lock_irqsave(&xhci->lock, flags); |
| 1894 | reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; |
| 1895 | list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); |
| 1896 | ret = xhci_queue_reset_device(xhci, slot_id); |
| 1897 | if (ret) { |
| 1898 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); |
| 1899 | list_del(&reset_device_cmd->cmd_list); |
| 1900 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1901 | goto command_cleanup; |
| 1902 | } |
| 1903 | xhci_ring_cmd_db(xhci); |
| 1904 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1905 | |
| 1906 | /* Wait for the Reset Device command to finish */ |
| 1907 | timeleft = wait_for_completion_interruptible_timeout( |
| 1908 | reset_device_cmd->completion, |
| 1909 | USB_CTRL_SET_TIMEOUT); |
| 1910 | if (timeleft <= 0) { |
| 1911 | xhci_warn(xhci, "%s while waiting for reset device command\n", |
| 1912 | timeleft == 0 ? "Timeout" : "Signal"); |
| 1913 | spin_lock_irqsave(&xhci->lock, flags); |
| 1914 | /* The timeout might have raced with the event ring handler, so |
| 1915 | * only delete from the list if the item isn't poisoned. |
| 1916 | */ |
| 1917 | if (reset_device_cmd->cmd_list.next != LIST_POISON1) |
| 1918 | list_del(&reset_device_cmd->cmd_list); |
| 1919 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1920 | ret = -ETIME; |
| 1921 | goto command_cleanup; |
| 1922 | } |
| 1923 | |
| 1924 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, |
| 1925 | * unless we tried to reset a slot ID that wasn't enabled, |
| 1926 | * or the device wasn't in the addressed or configured state. |
| 1927 | */ |
| 1928 | ret = reset_device_cmd->status; |
| 1929 | switch (ret) { |
| 1930 | case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ |
| 1931 | case COMP_CTX_STATE: /* 0.96 completion code for same thing */ |
| 1932 | xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", |
| 1933 | slot_id, |
| 1934 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); |
| 1935 | xhci_info(xhci, "Not freeing device rings.\n"); |
| 1936 | /* Don't treat this as an error. May change my mind later. */ |
| 1937 | ret = 0; |
| 1938 | goto command_cleanup; |
| 1939 | case COMP_SUCCESS: |
| 1940 | xhci_dbg(xhci, "Successful reset device command.\n"); |
| 1941 | break; |
| 1942 | default: |
| 1943 | if (xhci_is_vendor_info_code(xhci, ret)) |
| 1944 | break; |
| 1945 | xhci_warn(xhci, "Unknown completion code %u for " |
| 1946 | "reset device command.\n", ret); |
| 1947 | ret = -EINVAL; |
| 1948 | goto command_cleanup; |
| 1949 | } |
| 1950 | |
| 1951 | /* Everything but endpoint 0 is disabled, so free or cache the rings. */ |
| 1952 | last_freed_endpoint = 1; |
| 1953 | for (i = 1; i < 31; ++i) { |
| 1954 | if (!virt_dev->eps[i].ring) |
| 1955 | continue; |
| 1956 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
| 1957 | last_freed_endpoint = i; |
| 1958 | } |
| 1959 | xhci_dbg(xhci, "Output context after successful reset device cmd:\n"); |
| 1960 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint); |
| 1961 | ret = 0; |
| 1962 | |
| 1963 | command_cleanup: |
| 1964 | xhci_free_command(xhci, reset_device_cmd); |
| 1965 | return ret; |
| 1966 | } |
| 1967 | |
| 1968 | /* |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 1969 | * At this point, the struct usb_device is about to go away, the device has |
| 1970 | * disconnected, and all traffic has been stopped and the endpoints have been |
| 1971 | * disabled. Free any HC data structures associated with that device. |
| 1972 | */ |
| 1973 | void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) |
| 1974 | { |
| 1975 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 1976 | struct xhci_virt_device *virt_dev; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 1977 | unsigned long flags; |
Sarah Sharp | c526d0d | 2009-09-16 16:42:39 -0700 | [diff] [blame] | 1978 | u32 state; |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 1979 | int i; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 1980 | |
| 1981 | if (udev->slot_id == 0) |
| 1982 | return; |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 1983 | virt_dev = xhci->devs[udev->slot_id]; |
| 1984 | if (!virt_dev) |
| 1985 | return; |
| 1986 | |
| 1987 | /* Stop any wayward timer functions (which may grab the lock) */ |
| 1988 | for (i = 0; i < 31; ++i) { |
| 1989 | virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING; |
| 1990 | del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); |
| 1991 | } |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 1992 | |
| 1993 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | c526d0d | 2009-09-16 16:42:39 -0700 | [diff] [blame] | 1994 | /* Don't disable the slot if the host controller is dead. */ |
| 1995 | state = xhci_readl(xhci, &xhci->op_regs->status); |
Sarah Sharp | 6f5165c | 2009-10-27 10:57:01 -0700 | [diff] [blame] | 1996 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
Sarah Sharp | c526d0d | 2009-09-16 16:42:39 -0700 | [diff] [blame] | 1997 | xhci_free_virt_device(xhci, udev->slot_id); |
| 1998 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 1999 | return; |
| 2000 | } |
| 2001 | |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2002 | if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2003 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2004 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); |
| 2005 | return; |
| 2006 | } |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2007 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2008 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2009 | /* |
| 2010 | * Event command completion handler will free any data structures |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 2011 | * associated with the slot. XXX Can free sleep? |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2012 | */ |
| 2013 | } |
| 2014 | |
| 2015 | /* |
| 2016 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command |
| 2017 | * timed out, or allocating memory failed. Returns 1 on success. |
| 2018 | */ |
| 2019 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) |
| 2020 | { |
| 2021 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 2022 | unsigned long flags; |
| 2023 | int timeleft; |
| 2024 | int ret; |
| 2025 | |
| 2026 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2027 | ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2028 | if (ret) { |
| 2029 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2030 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); |
| 2031 | return 0; |
| 2032 | } |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2033 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2034 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2035 | |
| 2036 | /* XXX: how much time for xHC slot assignment? */ |
| 2037 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, |
| 2038 | USB_CTRL_SET_TIMEOUT); |
| 2039 | if (timeleft <= 0) { |
| 2040 | xhci_warn(xhci, "%s while waiting for a slot\n", |
| 2041 | timeleft == 0 ? "Timeout" : "Signal"); |
| 2042 | /* FIXME cancel the enable slot request */ |
| 2043 | return 0; |
| 2044 | } |
| 2045 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2046 | if (!xhci->slot_id) { |
| 2047 | xhci_err(xhci, "Error while assigning device slot ID\n"); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2048 | return 0; |
| 2049 | } |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 2050 | /* xhci_alloc_virt_device() does not touch rings; no need to lock */ |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2051 | if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_KERNEL)) { |
| 2052 | /* Disable slot, if we can do it without mem alloc */ |
| 2053 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 2054 | spin_lock_irqsave(&xhci->lock, flags); |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2055 | if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) |
| 2056 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2057 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2058 | return 0; |
| 2059 | } |
| 2060 | udev->slot_id = xhci->slot_id; |
| 2061 | /* Is this a LS or FS device under a HS hub? */ |
| 2062 | /* Hub or peripherial? */ |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2063 | return 1; |
| 2064 | } |
| 2065 | |
| 2066 | /* |
| 2067 | * Issue an Address Device command (which will issue a SetAddress request to |
| 2068 | * the device). |
| 2069 | * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so |
| 2070 | * we should only issue and wait on one address command at the same time. |
| 2071 | * |
| 2072 | * We add one to the device address issued by the hardware because the USB core |
| 2073 | * uses address 1 for the root hubs (even though they're not really devices). |
| 2074 | */ |
| 2075 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) |
| 2076 | { |
| 2077 | unsigned long flags; |
| 2078 | int timeleft; |
| 2079 | struct xhci_virt_device *virt_dev; |
| 2080 | int ret = 0; |
| 2081 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2082 | struct xhci_slot_ctx *slot_ctx; |
| 2083 | struct xhci_input_control_ctx *ctrl_ctx; |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 2084 | u64 temp_64; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2085 | |
| 2086 | if (!udev->slot_id) { |
| 2087 | xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); |
| 2088 | return -EINVAL; |
| 2089 | } |
| 2090 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2091 | virt_dev = xhci->devs[udev->slot_id]; |
| 2092 | |
| 2093 | /* If this is a Set Address to an unconfigured device, setup ep 0 */ |
| 2094 | if (!udev->config) |
| 2095 | xhci_setup_addressable_virt_dev(xhci, udev); |
| 2096 | /* Otherwise, assume the core has the device configured how it wants */ |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 2097 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2098 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2099 | |
Sarah Sharp | f88ba78 | 2009-05-14 11:44:22 -0700 | [diff] [blame] | 2100 | spin_lock_irqsave(&xhci->lock, flags); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2101 | ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, |
| 2102 | udev->slot_id); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2103 | if (ret) { |
| 2104 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2105 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); |
| 2106 | return ret; |
| 2107 | } |
Sarah Sharp | 23e3be1 | 2009-04-29 19:05:20 -0700 | [diff] [blame] | 2108 | xhci_ring_cmd_db(xhci); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2109 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2110 | |
| 2111 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ |
| 2112 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, |
| 2113 | USB_CTRL_SET_TIMEOUT); |
| 2114 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing |
| 2115 | * the SetAddress() "recovery interval" required by USB and aborting the |
| 2116 | * command on a timeout. |
| 2117 | */ |
| 2118 | if (timeleft <= 0) { |
| 2119 | xhci_warn(xhci, "%s while waiting for a slot\n", |
| 2120 | timeleft == 0 ? "Timeout" : "Signal"); |
| 2121 | /* FIXME cancel the address device command */ |
| 2122 | return -ETIME; |
| 2123 | } |
| 2124 | |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2125 | switch (virt_dev->cmd_status) { |
| 2126 | case COMP_CTX_STATE: |
| 2127 | case COMP_EBADSLT: |
| 2128 | xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", |
| 2129 | udev->slot_id); |
| 2130 | ret = -EINVAL; |
| 2131 | break; |
| 2132 | case COMP_TX_ERR: |
| 2133 | dev_warn(&udev->dev, "Device not responding to set address.\n"); |
| 2134 | ret = -EPROTO; |
| 2135 | break; |
| 2136 | case COMP_SUCCESS: |
| 2137 | xhci_dbg(xhci, "Successful Address Device command\n"); |
| 2138 | break; |
| 2139 | default: |
| 2140 | xhci_err(xhci, "ERROR: unexpected command completion " |
| 2141 | "code 0x%x.\n", virt_dev->cmd_status); |
Sarah Sharp | 66e49d8 | 2009-07-27 12:03:46 -0700 | [diff] [blame] | 2142 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2143 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2144 | ret = -EINVAL; |
| 2145 | break; |
| 2146 | } |
| 2147 | if (ret) { |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2148 | return ret; |
| 2149 | } |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 2150 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
| 2151 | xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); |
| 2152 | xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2153 | udev->slot_id, |
Sarah Sharp | 8e595a5 | 2009-07-27 12:03:31 -0700 | [diff] [blame] | 2154 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], |
| 2155 | (unsigned long long) |
| 2156 | xhci->dcbaa->dev_context_ptrs[udev->slot_id]); |
Greg Kroah-Hartman | 700e205 | 2009-04-29 19:14:08 -0700 | [diff] [blame] | 2157 | xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2158 | (unsigned long long)virt_dev->out_ctx->dma); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2159 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2160 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2161 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2162 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2163 | /* |
| 2164 | * USB core uses address 1 for the roothubs, so we add one to the |
| 2165 | * address given back to us by the HC. |
| 2166 | */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2167 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
| 2168 | udev->devnum = (slot_ctx->dev_state & DEV_ADDR_MASK) + 1; |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 2169 | /* Zero the input context control for later use */ |
John Youn | d115b04 | 2009-07-27 12:05:15 -0700 | [diff] [blame] | 2170 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
| 2171 | ctrl_ctx->add_flags = 0; |
| 2172 | ctrl_ctx->drop_flags = 0; |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 2173 | |
| 2174 | xhci_dbg(xhci, "Device address = %d\n", udev->devnum); |
| 2175 | /* XXX Meh, not sure if anyone else but choose_address uses this. */ |
| 2176 | set_bit(udev->devnum, udev->bus->devmap.devicemap); |
| 2177 | |
| 2178 | return 0; |
| 2179 | } |
| 2180 | |
Sarah Sharp | ac1c1b7 | 2009-09-04 10:53:20 -0700 | [diff] [blame] | 2181 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
| 2182 | * internal data structures for the device. |
| 2183 | */ |
| 2184 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, |
| 2185 | struct usb_tt *tt, gfp_t mem_flags) |
| 2186 | { |
| 2187 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 2188 | struct xhci_virt_device *vdev; |
| 2189 | struct xhci_command *config_cmd; |
| 2190 | struct xhci_input_control_ctx *ctrl_ctx; |
| 2191 | struct xhci_slot_ctx *slot_ctx; |
| 2192 | unsigned long flags; |
| 2193 | unsigned think_time; |
| 2194 | int ret; |
| 2195 | |
| 2196 | /* Ignore root hubs */ |
| 2197 | if (!hdev->parent) |
| 2198 | return 0; |
| 2199 | |
| 2200 | vdev = xhci->devs[hdev->slot_id]; |
| 2201 | if (!vdev) { |
| 2202 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); |
| 2203 | return -EINVAL; |
| 2204 | } |
Sarah Sharp | a1d78c1 | 2009-12-09 15:59:03 -0800 | [diff] [blame] | 2205 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
Sarah Sharp | ac1c1b7 | 2009-09-04 10:53:20 -0700 | [diff] [blame] | 2206 | if (!config_cmd) { |
| 2207 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); |
| 2208 | return -ENOMEM; |
| 2209 | } |
| 2210 | |
| 2211 | spin_lock_irqsave(&xhci->lock, flags); |
| 2212 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); |
| 2213 | ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); |
| 2214 | ctrl_ctx->add_flags |= SLOT_FLAG; |
| 2215 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); |
| 2216 | slot_ctx->dev_info |= DEV_HUB; |
| 2217 | if (tt->multi) |
| 2218 | slot_ctx->dev_info |= DEV_MTT; |
| 2219 | if (xhci->hci_version > 0x95) { |
| 2220 | xhci_dbg(xhci, "xHCI version %x needs hub " |
| 2221 | "TT think time and number of ports\n", |
| 2222 | (unsigned int) xhci->hci_version); |
| 2223 | slot_ctx->dev_info2 |= XHCI_MAX_PORTS(hdev->maxchild); |
| 2224 | /* Set TT think time - convert from ns to FS bit times. |
| 2225 | * 0 = 8 FS bit times, 1 = 16 FS bit times, |
| 2226 | * 2 = 24 FS bit times, 3 = 32 FS bit times. |
| 2227 | */ |
| 2228 | think_time = tt->think_time; |
| 2229 | if (think_time != 0) |
| 2230 | think_time = (think_time / 666) - 1; |
| 2231 | slot_ctx->tt_info |= TT_THINK_TIME(think_time); |
| 2232 | } else { |
| 2233 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " |
| 2234 | "TT think time or number of ports\n", |
| 2235 | (unsigned int) xhci->hci_version); |
| 2236 | } |
| 2237 | slot_ctx->dev_state = 0; |
| 2238 | spin_unlock_irqrestore(&xhci->lock, flags); |
| 2239 | |
| 2240 | xhci_dbg(xhci, "Set up %s for hub device.\n", |
| 2241 | (xhci->hci_version > 0x95) ? |
| 2242 | "configure endpoint" : "evaluate context"); |
| 2243 | xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id); |
| 2244 | xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0); |
| 2245 | |
| 2246 | /* Issue and wait for the configure endpoint or |
| 2247 | * evaluate context command. |
| 2248 | */ |
| 2249 | if (xhci->hci_version > 0x95) |
| 2250 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, |
| 2251 | false, false); |
| 2252 | else |
| 2253 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, |
| 2254 | true, false); |
| 2255 | |
| 2256 | xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id); |
| 2257 | xhci_dbg_ctx(xhci, vdev->out_ctx, 0); |
| 2258 | |
| 2259 | xhci_free_command(xhci, config_cmd); |
| 2260 | return ret; |
| 2261 | } |
| 2262 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 2263 | int xhci_get_frame(struct usb_hcd *hcd) |
| 2264 | { |
| 2265 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
| 2266 | /* EHCI mods by the periodic size. Why? */ |
| 2267 | return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; |
| 2268 | } |
| 2269 | |
| 2270 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2271 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 2272 | MODULE_LICENSE("GPL"); |
| 2273 | |
| 2274 | static int __init xhci_hcd_init(void) |
| 2275 | { |
| 2276 | #ifdef CONFIG_PCI |
| 2277 | int retval = 0; |
| 2278 | |
| 2279 | retval = xhci_register_pci(); |
| 2280 | |
| 2281 | if (retval < 0) { |
| 2282 | printk(KERN_DEBUG "Problem registering PCI driver."); |
| 2283 | return retval; |
| 2284 | } |
| 2285 | #endif |
Sarah Sharp | 9844197 | 2009-05-14 11:44:18 -0700 | [diff] [blame] | 2286 | /* |
| 2287 | * Check the compiler generated sizes of structures that must be laid |
| 2288 | * out in specific ways for hardware access. |
| 2289 | */ |
| 2290 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); |
| 2291 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); |
| 2292 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); |
| 2293 | /* xhci_device_control has eight fields, and also |
| 2294 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx |
| 2295 | */ |
Sarah Sharp | 9844197 | 2009-05-14 11:44:18 -0700 | [diff] [blame] | 2296 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
| 2297 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); |
| 2298 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); |
| 2299 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8); |
| 2300 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); |
| 2301 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ |
| 2302 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); |
| 2303 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 2304 | return 0; |
| 2305 | } |
| 2306 | module_init(xhci_hcd_init); |
| 2307 | |
| 2308 | static void __exit xhci_hcd_cleanup(void) |
| 2309 | { |
| 2310 | #ifdef CONFIG_PCI |
| 2311 | xhci_unregister_pci(); |
| 2312 | #endif |
| 2313 | } |
| 2314 | module_exit(xhci_hcd_cleanup); |