diff options
Diffstat (limited to 'drivers/usb/host/xhci.c')
| -rw-r--r-- | drivers/usb/host/xhci.c | 2078 |
1 files changed, 1459 insertions, 619 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 6bbe3c3a711..7436d5f5e67 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -26,8 +26,11 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/slab.h> +#include <linux/dmi.h> +#include <linux/dma-mapping.h> #include "xhci.h" +#include "xhci-trace.h" #define DRIVER_AUTHOR "Sarah Sharp" #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" @@ -37,9 +40,13 @@ static int link_quirk; module_param(link_quirk, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); +static unsigned int quirks; +module_param(quirks, uint, S_IRUGO); +MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default"); + /* TODO: copied from ehci-hcd.c - can this be refactored? */ /* - * handshake - spin reading hc until handshake completes or fails + * xhci_handshake - spin reading hc until handshake completes or fails * @ptr: address of hc register to be read * @mask: bits to look at in result of read * @done: value of those bits when handshake succeeds @@ -51,13 +58,13 @@ MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); * handshake done). There are two failure modes: "usec" have passed (major * hardware flakeout), or the register reads as all-ones (hardware removed). */ -static int handshake(struct xhci_hcd *xhci, void __iomem *ptr, +int xhci_handshake(struct xhci_hcd *xhci, void __iomem *ptr, u32 mask, u32 done, int usec) { u32 result; do { - result = xhci_readl(xhci, ptr); + result = readl(ptr); if (result == ~(u32)0) /* card removed */ return -ENODEV; result &= mask; @@ -79,13 +86,13 @@ void xhci_quiesce(struct xhci_hcd *xhci) u32 mask; mask = ~(XHCI_IRQS); - halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT; + halted = readl(&xhci->op_regs->status) & STS_HALT; if (!halted) mask &= ~CMD_RUN; - cmd = xhci_readl(xhci, &xhci->op_regs->command); + cmd = readl(&xhci->op_regs->command); cmd &= mask; - xhci_writel(xhci, cmd, &xhci->op_regs->command); + writel(cmd, &xhci->op_regs->command); } /* @@ -99,13 +106,17 @@ void xhci_quiesce(struct xhci_hcd *xhci) int xhci_halt(struct xhci_hcd *xhci) { int ret; - xhci_dbg(xhci, "// Halt the HC\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Halt the HC"); xhci_quiesce(xhci); - ret = handshake(xhci, &xhci->op_regs->status, + ret = xhci_handshake(xhci, &xhci->op_regs->status, STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); - if (!ret) + if (!ret) { xhci->xhc_state |= XHCI_STATE_HALTED; + xhci->cmd_ring_state = CMD_RING_STATE_STOPPED; + } else + xhci_warn(xhci, "Host not halted after %u microseconds.\n", + XHCI_MAX_HALT_USEC); return ret; } @@ -117,17 +128,17 @@ static int xhci_start(struct xhci_hcd *xhci) u32 temp; int ret; - temp = xhci_readl(xhci, &xhci->op_regs->command); + temp = readl(&xhci->op_regs->command); temp |= (CMD_RUN); - xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Turn on HC, cmd = 0x%x.", temp); - xhci_writel(xhci, temp, &xhci->op_regs->command); + writel(temp, &xhci->op_regs->command); /* * Wait for the HCHalted Status bit to be 0 to indicate the host is * running. */ - ret = handshake(xhci, &xhci->op_regs->status, + ret = xhci_handshake(xhci, &xhci->op_regs->status, STS_HALT, 0, XHCI_MAX_HALT_USEC); if (ret == -ETIMEDOUT) xhci_err(xhci, "Host took too long to start, " @@ -149,30 +160,40 @@ int xhci_reset(struct xhci_hcd *xhci) { u32 command; u32 state; - int ret; + int ret, i; - state = xhci_readl(xhci, &xhci->op_regs->status); + state = readl(&xhci->op_regs->status); if ((state & STS_HALT) == 0) { xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); return 0; } - xhci_dbg(xhci, "// Reset the HC\n"); - command = xhci_readl(xhci, &xhci->op_regs->command); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Reset the HC"); + command = readl(&xhci->op_regs->command); command |= CMD_RESET; - xhci_writel(xhci, command, &xhci->op_regs->command); + writel(command, &xhci->op_regs->command); - ret = handshake(xhci, &xhci->op_regs->command, - CMD_RESET, 0, 250 * 1000); + ret = xhci_handshake(xhci, &xhci->op_regs->command, + CMD_RESET, 0, 10 * 1000 * 1000); if (ret) return ret; - xhci_dbg(xhci, "Wait for controller to be ready for doorbell rings\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "Wait for controller to be ready for doorbell rings"); /* * xHCI cannot write to any doorbells or operational registers other * than status until the "Controller Not Ready" flag is cleared. */ - return handshake(xhci, &xhci->op_regs->status, STS_CNR, 0, 250 * 1000); + ret = xhci_handshake(xhci, &xhci->op_regs->status, + STS_CNR, 0, 10 * 1000 * 1000); + + for (i = 0; i < 2; ++i) { + xhci->bus_state[i].port_c_suspend = 0; + xhci->bus_state[i].suspended_ports = 0; + xhci->bus_state[i].resuming_ports = 0; + } + + return ret; } #ifdef CONFIG_PCI @@ -200,14 +221,16 @@ static int xhci_setup_msi(struct xhci_hcd *xhci) ret = pci_enable_msi(pdev); if (ret) { - xhci_dbg(xhci, "failed to allocate MSI entry\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "failed to allocate MSI entry"); return ret; } - ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq, + ret = request_irq(pdev->irq, xhci_msi_irq, 0, "xhci_hcd", xhci_to_hcd(xhci)); if (ret) { - xhci_dbg(xhci, "disable MSI interrupt\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "disable MSI interrupt"); pci_disable_msi(pdev); } @@ -224,13 +247,13 @@ static void xhci_free_irq(struct xhci_hcd *xhci) int ret; /* return if using legacy interrupt */ - if (xhci_to_hcd(xhci)->irq >= 0) + if (xhci_to_hcd(xhci)->irq > 0) return; ret = xhci_free_msi(xhci); if (!ret) return; - if (pdev->irq >= 0) + if (pdev->irq > 0) free_irq(pdev->irq, xhci_to_hcd(xhci)); return; @@ -268,15 +291,16 @@ static int xhci_setup_msix(struct xhci_hcd *xhci) xhci->msix_entries[i].vector = 0; } - ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); + ret = pci_enable_msix_exact(pdev, xhci->msix_entries, xhci->msix_count); if (ret) { - xhci_dbg(xhci, "Failed to enable MSI-X\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "Failed to enable MSI-X"); goto free_entries; } for (i = 0; i < xhci->msix_count; i++) { ret = request_irq(xhci->msix_entries[i].vector, - (irq_handler_t)xhci_msi_irq, + xhci_msi_irq, 0, "xhci_hcd", xhci_to_hcd(xhci)); if (ret) goto disable_msix; @@ -286,7 +310,7 @@ static int xhci_setup_msix(struct xhci_hcd *xhci) return ret; disable_msix: - xhci_dbg(xhci, "disable MSI-X interrupt\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI-X interrupt"); xhci_free_irq(xhci); pci_disable_msix(pdev); free_entries: @@ -301,6 +325,9 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci) struct usb_hcd *hcd = xhci_to_hcd(xhci); struct pci_dev *pdev = to_pci_dev(hcd->self.controller); + if (xhci->quirks & XHCI_PLAT) + return; + xhci_free_irq(xhci); if (xhci->msix_entries) { @@ -315,7 +342,7 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci) return; } -static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) +static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci) { int i; @@ -328,20 +355,25 @@ static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) static int xhci_try_enable_msi(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); - struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); + struct pci_dev *pdev; int ret; + /* The xhci platform device has set up IRQs through usb_add_hcd. */ + if (xhci->quirks & XHCI_PLAT) + return 0; + + pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); /* * Some Fresco Logic host controllers advertise MSI, but fail to * generate interrupts. Don't even try to enable MSI. */ if (xhci->quirks & XHCI_BROKEN_MSI) - return 0; + goto legacy_irq; /* unregister the legacy interrupt */ if (hcd->irq) free_irq(hcd->irq, hcd); - hcd->irq = -1; + hcd->irq = 0; ret = xhci_setup_msix(xhci); if (ret) @@ -349,9 +381,19 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd) ret = xhci_setup_msi(xhci); if (!ret) - /* hcd->irq is -1, we have MSI */ + /* hcd->irq is 0, we have MSI */ return 0; + if (!pdev->irq) { + xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); + return -EINVAL; + } + + legacy_irq: + if (!strlen(hcd->irq_descr)) + snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", + hcd->driver->description, hcd->self.busnum); + /* fall back to legacy interrupt*/ ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, hcd->irq_descr, hcd); @@ -366,21 +408,116 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd) #else -static int xhci_try_enable_msi(struct usb_hcd *hcd) +static inline int xhci_try_enable_msi(struct usb_hcd *hcd) { return 0; } -static void xhci_cleanup_msix(struct xhci_hcd *xhci) +static inline void xhci_cleanup_msix(struct xhci_hcd *xhci) { } -static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) +static inline void xhci_msix_sync_irqs(struct xhci_hcd *xhci) { } #endif +static void compliance_mode_recovery(unsigned long arg) +{ + struct xhci_hcd *xhci; + struct usb_hcd *hcd; + u32 temp; + int i; + + xhci = (struct xhci_hcd *)arg; + + for (i = 0; i < xhci->num_usb3_ports; i++) { + temp = readl(xhci->usb3_ports[i]); + if ((temp & PORT_PLS_MASK) == USB_SS_PORT_LS_COMP_MOD) { + /* + * Compliance Mode Detected. Letting USB Core + * handle the Warm Reset + */ + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Compliance mode detected->port %d", + i + 1); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Attempting compliance mode recovery"); + hcd = xhci->shared_hcd; + + if (hcd->state == HC_STATE_SUSPENDED) + usb_hcd_resume_root_hub(hcd); + + usb_hcd_poll_rh_status(hcd); + } + } + + if (xhci->port_status_u0 != ((1 << xhci->num_usb3_ports)-1)) + mod_timer(&xhci->comp_mode_recovery_timer, + jiffies + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS)); +} + +/* + * Quirk to work around issue generated by the SN65LVPE502CP USB3.0 re-driver + * that causes ports behind that hardware to enter compliance mode sometimes. + * The quirk creates a timer that polls every 2 seconds the link state of + * each host controller's port and recovers it by issuing a Warm reset + * if Compliance mode is detected, otherwise the port will become "dead" (no + * device connections or disconnections will be detected anymore). Becasue no + * status event is generated when entering compliance mode (per xhci spec), + * this quirk is needed on systems that have the failing hardware installed. + */ +static void compliance_mode_recovery_timer_init(struct xhci_hcd *xhci) +{ + xhci->port_status_u0 = 0; + init_timer(&xhci->comp_mode_recovery_timer); + + xhci->comp_mode_recovery_timer.data = (unsigned long) xhci; + xhci->comp_mode_recovery_timer.function = compliance_mode_recovery; + xhci->comp_mode_recovery_timer.expires = jiffies + + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS); + + set_timer_slack(&xhci->comp_mode_recovery_timer, + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS)); + add_timer(&xhci->comp_mode_recovery_timer); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Compliance mode recovery timer initialized"); +} + +/* + * This function identifies the systems that have installed the SN65LVPE502CP + * USB3.0 re-driver and that need the Compliance Mode Quirk. + * Systems: + * Vendor: Hewlett-Packard -> System Models: Z420, Z620 and Z820 + */ +bool xhci_compliance_mode_recovery_timer_quirk_check(void) +{ + const char *dmi_product_name, *dmi_sys_vendor; + + dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME); + dmi_sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR); + if (!dmi_product_name || !dmi_sys_vendor) + return false; + + if (!(strstr(dmi_sys_vendor, "Hewlett-Packard"))) + return false; + + if (strstr(dmi_product_name, "Z420") || + strstr(dmi_product_name, "Z620") || + strstr(dmi_product_name, "Z820") || + strstr(dmi_product_name, "Z1 Workstation")) + return true; + + return false; +} + +static int xhci_all_ports_seen_u0(struct xhci_hcd *xhci) +{ + return (xhci->port_status_u0 == ((1 << xhci->num_usb3_ports)-1)); +} + + /* * Initialize memory for HCD and xHC (one-time init). * @@ -393,16 +530,24 @@ int xhci_init(struct usb_hcd *hcd) struct xhci_hcd *xhci = hcd_to_xhci(hcd); int retval = 0; - xhci_dbg(xhci, "xhci_init\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "xhci_init"); spin_lock_init(&xhci->lock); if (xhci->hci_version == 0x95 && link_quirk) { - xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "QUIRK: Not clearing Link TRB chain bits."); xhci->quirks |= XHCI_LINK_TRB_QUIRK; } else { - xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "xHCI doesn't need link TRB QUIRK"); } retval = xhci_mem_init(xhci, GFP_KERNEL); - xhci_dbg(xhci, "Finished xhci_init\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Finished xhci_init"); + + /* Initializing Compliance Mode Recovery Data If Needed */ + if (xhci_compliance_mode_recovery_timer_quirk_check()) { + xhci->quirks |= XHCI_COMP_MODE_QUIRK; + compliance_mode_recovery_timer_init(xhci); + } return retval; } @@ -410,57 +555,6 @@ int xhci_init(struct usb_hcd *hcd) /*-------------------------------------------------------------------------*/ -#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING -static void xhci_event_ring_work(unsigned long arg) -{ - unsigned long flags; - int temp; - u64 temp_64; - struct xhci_hcd *xhci = (struct xhci_hcd *) arg; - int i, j; - - xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); - - spin_lock_irqsave(&xhci->lock, flags); - temp = xhci_readl(xhci, &xhci->op_regs->status); - xhci_dbg(xhci, "op reg status = 0x%x\n", temp); - if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || - (xhci->xhc_state & XHCI_STATE_HALTED)) { - xhci_dbg(xhci, "HW died, polling stopped.\n"); - spin_unlock_irqrestore(&xhci->lock, flags); - return; - } - - temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); - xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); - xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); - xhci->error_bitmask = 0; - xhci_dbg(xhci, "Event ring:\n"); - xhci_debug_segment(xhci, xhci->event_ring->deq_seg); - xhci_dbg_ring_ptrs(xhci, xhci->event_ring); - temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); - temp_64 &= ~ERST_PTR_MASK; - xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); - xhci_dbg(xhci, "Command ring:\n"); - xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); - xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); - xhci_dbg_cmd_ptrs(xhci); - for (i = 0; i < MAX_HC_SLOTS; ++i) { - if (!xhci->devs[i]) - continue; - for (j = 0; j < 31; ++j) { - xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); - } - } - spin_unlock_irqrestore(&xhci->lock, flags); - - if (!xhci->zombie) - mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); - else - xhci_dbg(xhci, "Quit polling the event ring.\n"); -} -#endif - static int xhci_run_finished(struct xhci_hcd *xhci) { if (xhci_start(xhci)) { @@ -468,11 +562,13 @@ static int xhci_run_finished(struct xhci_hcd *xhci) return -ENODEV; } xhci->shared_hcd->state = HC_STATE_RUNNING; + xhci->cmd_ring_state = CMD_RING_STATE_RUNNING; if (xhci->quirks & XHCI_NEC_HOST) xhci_ring_cmd_db(xhci); - xhci_dbg(xhci, "Finished xhci_run for USB3 roothub\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "Finished xhci_run for USB3 roothub"); return 0; } @@ -503,23 +599,12 @@ int xhci_run(struct usb_hcd *hcd) if (!usb_hcd_is_primary_hcd(hcd)) return xhci_run_finished(xhci); - xhci_dbg(xhci, "xhci_run\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "xhci_run"); ret = xhci_try_enable_msi(hcd); if (ret) return ret; -#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING - init_timer(&xhci->event_ring_timer); - xhci->event_ring_timer.data = (unsigned long) xhci; - xhci->event_ring_timer.function = xhci_event_ring_work; - /* Poll the event ring */ - xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; - xhci->zombie = 0; - xhci_dbg(xhci, "Setting event ring polling timer\n"); - add_timer(&xhci->event_ring_timer); -#endif - xhci_dbg(xhci, "Command ring memory map follows:\n"); xhci_debug_ring(xhci, xhci->cmd_ring); xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); @@ -532,33 +617,40 @@ int xhci_run(struct usb_hcd *hcd) xhci_dbg_ring_ptrs(xhci, xhci->event_ring); temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); temp_64 &= ~ERST_PTR_MASK; - xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "ERST deq = 64'h%0lx", (long unsigned int) temp_64); - xhci_dbg(xhci, "// Set the interrupt modulation register\n"); - temp = xhci_readl(xhci, &xhci->ir_set->irq_control); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "// Set the interrupt modulation register"); + temp = readl(&xhci->ir_set->irq_control); temp &= ~ER_IRQ_INTERVAL_MASK; temp |= (u32) 160; - xhci_writel(xhci, temp, &xhci->ir_set->irq_control); + writel(temp, &xhci->ir_set->irq_control); /* Set the HCD state before we enable the irqs */ - temp = xhci_readl(xhci, &xhci->op_regs->command); + temp = readl(&xhci->op_regs->command); temp |= (CMD_EIE); - xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", - temp); - xhci_writel(xhci, temp, &xhci->op_regs->command); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "// Enable interrupts, cmd = 0x%x.", temp); + writel(temp, &xhci->op_regs->command); - temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); - xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", + temp = readl(&xhci->ir_set->irq_pending); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "// Enabling event ring interrupter %p by writing 0x%x to irq_pending", xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); - xhci_writel(xhci, ER_IRQ_ENABLE(temp), - &xhci->ir_set->irq_pending); + writel(ER_IRQ_ENABLE(temp), &xhci->ir_set->irq_pending); xhci_print_ir_set(xhci, 0); - if (xhci->quirks & XHCI_NEC_HOST) - xhci_queue_vendor_command(xhci, 0, 0, 0, + if (xhci->quirks & XHCI_NEC_HOST) { + struct xhci_command *command; + command = xhci_alloc_command(xhci, false, false, GFP_KERNEL); + if (!command) + return -ENOMEM; + xhci_queue_vendor_command(xhci, command, 0, 0, 0, TRB_TYPE(TRB_NEC_GET_FW)); - - xhci_dbg(xhci, "Finished xhci_run for USB2 roothub\n"); + } + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "Finished xhci_run for USB2 roothub"); return 0; } @@ -606,27 +698,31 @@ void xhci_stop(struct usb_hcd *hcd) xhci_cleanup_msix(xhci); -#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING - /* Tell the event ring poll function not to reschedule */ - xhci->zombie = 1; - del_timer_sync(&xhci->event_ring_timer); -#endif + /* Deleting Compliance Mode Recovery Timer */ + if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && + (!(xhci_all_ports_seen_u0(xhci)))) { + del_timer_sync(&xhci->comp_mode_recovery_timer); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "%s: compliance mode recovery timer deleted", + __func__); + } if (xhci->quirks & XHCI_AMD_PLL_FIX) usb_amd_dev_put(); - xhci_dbg(xhci, "// Disabling event ring interrupts\n"); - temp = xhci_readl(xhci, &xhci->op_regs->status); - xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); - temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); - xhci_writel(xhci, ER_IRQ_DISABLE(temp), - &xhci->ir_set->irq_pending); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "// Disabling event ring interrupts"); + temp = readl(&xhci->op_regs->status); + writel(temp & ~STS_EINT, &xhci->op_regs->status); + temp = readl(&xhci->ir_set->irq_pending); + writel(ER_IRQ_DISABLE(temp), &xhci->ir_set->irq_pending); xhci_print_ir_set(xhci, 0); - xhci_dbg(xhci, "cleaning up memory\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "cleaning up memory"); xhci_mem_cleanup(xhci); - xhci_dbg(xhci, "xhci_stop completed - status = %x\n", - xhci_readl(xhci, &xhci->op_regs->status)); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "xhci_stop completed - status = %x", + readl(&xhci->op_regs->status)); } /* @@ -642,40 +738,52 @@ void xhci_shutdown(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); + if (xhci->quirks & XHCI_SPURIOUS_REBOOT) + usb_disable_xhci_ports(to_pci_dev(hcd->self.controller)); + spin_lock_irq(&xhci->lock); xhci_halt(xhci); + /* Workaround for spurious wakeups at shutdown with HSW */ + if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) + xhci_reset(xhci); spin_unlock_irq(&xhci->lock); xhci_cleanup_msix(xhci); - xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", - xhci_readl(xhci, &xhci->op_regs->status)); + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "xhci_shutdown completed - status = %x", + readl(&xhci->op_regs->status)); + + /* Yet another workaround for spurious wakeups at shutdown with HSW */ + if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) + pci_set_power_state(to_pci_dev(hcd->self.controller), PCI_D3hot); } #ifdef CONFIG_PM static void xhci_save_registers(struct xhci_hcd *xhci) { - xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command); - xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification); + xhci->s3.command = readl(&xhci->op_regs->command); + xhci->s3.dev_nt = readl(&xhci->op_regs->dev_notification); xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); - xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg); - xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); - xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control); - xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size); + xhci->s3.config_reg = readl(&xhci->op_regs->config_reg); + xhci->s3.erst_size = readl(&xhci->ir_set->erst_size); xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base); xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); + xhci->s3.irq_pending = readl(&xhci->ir_set->irq_pending); + xhci->s3.irq_control = readl(&xhci->ir_set->irq_control); } static void xhci_restore_registers(struct xhci_hcd *xhci) { - xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command); - xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification); + writel(xhci->s3.command, &xhci->op_regs->command); + writel(xhci->s3.dev_nt, &xhci->op_regs->dev_notification); xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); - xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg); - xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending); - xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control); - xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size); + writel(xhci->s3.config_reg, &xhci->op_regs->config_reg); + writel(xhci->s3.erst_size, &xhci->ir_set->erst_size); xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base); + xhci_write_64(xhci, xhci->s3.erst_dequeue, &xhci->ir_set->erst_dequeue); + writel(xhci->s3.irq_pending, &xhci->ir_set->irq_pending); + writel(xhci->s3.irq_control, &xhci->ir_set->irq_control); } static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) @@ -689,7 +797,8 @@ static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) xhci->cmd_ring->dequeue) & (u64) ~CMD_RING_RSVD_BITS) | xhci->cmd_ring->cycle_state; - xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "// Setting command ring address to 0x%llx", (long unsigned long) val_64); xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); } @@ -724,6 +833,7 @@ static void xhci_clear_command_ring(struct xhci_hcd *xhci) ring->enq_seg = ring->deq_seg; ring->enqueue = ring->dequeue; + ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1; /* * Ring is now zeroed, so the HW should look for change of ownership * when the cycle bit is set to 1. @@ -749,9 +859,19 @@ static void xhci_clear_command_ring(struct xhci_hcd *xhci) int xhci_suspend(struct xhci_hcd *xhci) { int rc = 0; + unsigned int delay = XHCI_MAX_HALT_USEC; struct usb_hcd *hcd = xhci_to_hcd(xhci); u32 command; + if (hcd->state != HC_STATE_SUSPENDED || + xhci->shared_hcd->state != HC_STATE_SUSPENDED) + return -EINVAL; + + /* Don't poll the roothubs on bus suspend. */ + xhci_dbg(xhci, "%s: stopping port polling.\n", __func__); + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + del_timer_sync(&hcd->rh_timer); + spin_lock_irq(&xhci->lock); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); @@ -759,11 +879,15 @@ int xhci_suspend(struct xhci_hcd *xhci) /* skipped assuming that port suspend has done */ /* step 2: clear Run/Stop bit */ - command = xhci_readl(xhci, &xhci->op_regs->command); + command = readl(&xhci->op_regs->command); command &= ~CMD_RUN; - xhci_writel(xhci, command, &xhci->op_regs->command); - if (handshake(xhci, &xhci->op_regs->status, - STS_HALT, STS_HALT, 100*100)) { + writel(command, &xhci->op_regs->command); + + /* Some chips from Fresco Logic need an extraordinary delay */ + delay *= (xhci->quirks & XHCI_SLOW_SUSPEND) ? 10 : 1; + + if (xhci_handshake(xhci, &xhci->op_regs->status, + STS_HALT, STS_HALT, delay)) { xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); spin_unlock_irq(&xhci->lock); return -ETIMEDOUT; @@ -774,16 +898,29 @@ int xhci_suspend(struct xhci_hcd *xhci) xhci_save_registers(xhci); /* step 4: set CSS flag */ - command = xhci_readl(xhci, &xhci->op_regs->command); + command = readl(&xhci->op_regs->command); command |= CMD_CSS; - xhci_writel(xhci, command, &xhci->op_regs->command); - if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10*100)) { - xhci_warn(xhci, "WARN: xHC CMD_CSS timeout\n"); + writel(command, &xhci->op_regs->command); + if (xhci_handshake(xhci, &xhci->op_regs->status, + STS_SAVE, 0, 10 * 1000)) { + xhci_warn(xhci, "WARN: xHC save state timeout\n"); spin_unlock_irq(&xhci->lock); return -ETIMEDOUT; } spin_unlock_irq(&xhci->lock); + /* + * Deleting Compliance Mode Recovery Timer because the xHCI Host + * is about to be suspended. + */ + if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && + (!(xhci_all_ports_seen_u0(xhci)))) { + del_timer_sync(&xhci->comp_mode_recovery_timer); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "%s: compliance mode recovery timer deleted", + __func__); + } + /* step 5: remove core well power */ /* synchronize irq when using MSI-X */ xhci_msix_sync_irqs(xhci); @@ -799,10 +936,11 @@ int xhci_suspend(struct xhci_hcd *xhci) */ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) { - u32 command, temp = 0; + u32 command, temp = 0, status; struct usb_hcd *hcd = xhci_to_hcd(xhci); struct usb_hcd *secondary_hcd; int retval = 0; + bool comp_timer_running = false; /* Wait a bit if either of the roothubs need to settle from the * transition into bus suspend. @@ -826,20 +964,28 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) xhci_set_cmd_ring_deq(xhci); /* step 3: restore state and start state*/ /* step 3: set CRS flag */ - command = xhci_readl(xhci, &xhci->op_regs->command); + command = readl(&xhci->op_regs->command); command |= CMD_CRS; - xhci_writel(xhci, command, &xhci->op_regs->command); - if (handshake(xhci, &xhci->op_regs->status, - STS_RESTORE, 0, 10*100)) { - xhci_dbg(xhci, "WARN: xHC CMD_CSS timeout\n"); + writel(command, &xhci->op_regs->command); + if (xhci_handshake(xhci, &xhci->op_regs->status, + STS_RESTORE, 0, 10 * 1000)) { + xhci_warn(xhci, "WARN: xHC restore state timeout\n"); spin_unlock_irq(&xhci->lock); return -ETIMEDOUT; } - temp = xhci_readl(xhci, &xhci->op_regs->status); + temp = readl(&xhci->op_regs->status); } /* If restore operation fails, re-initialize the HC during resume */ if ((temp & STS_SRE) || hibernated) { + + if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && + !(xhci_all_ports_seen_u0(xhci))) { + del_timer_sync(&xhci->comp_mode_recovery_timer); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Compliance Mode Recovery Timer deleted!"); + } + /* Let the USB core know _both_ roothubs lost power. */ usb_root_hub_lost_power(xhci->main_hcd->self.root_hub); usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub); @@ -850,24 +996,17 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) spin_unlock_irq(&xhci->lock); xhci_cleanup_msix(xhci); -#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING - /* Tell the event ring poll function not to reschedule */ - xhci->zombie = 1; - del_timer_sync(&xhci->event_ring_timer); -#endif - xhci_dbg(xhci, "// Disabling event ring interrupts\n"); - temp = xhci_readl(xhci, &xhci->op_regs->status); - xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); - temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); - xhci_writel(xhci, ER_IRQ_DISABLE(temp), - &xhci->ir_set->irq_pending); + temp = readl(&xhci->op_regs->status); + writel(temp & ~STS_EINT, &xhci->op_regs->status); + temp = readl(&xhci->ir_set->irq_pending); + writel(ER_IRQ_DISABLE(temp), &xhci->ir_set->irq_pending); xhci_print_ir_set(xhci, 0); xhci_dbg(xhci, "cleaning up memory\n"); xhci_mem_cleanup(xhci); xhci_dbg(xhci, "xhci_stop completed - status = %x\n", - xhci_readl(xhci, &xhci->op_regs->status)); + readl(&xhci->op_regs->status)); /* USB core calls the PCI reinit and start functions twice: * first with the primary HCD, and then with the secondary HCD. @@ -882,6 +1021,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) retval = xhci_init(hcd->primary_hcd); if (retval) return retval; + comp_timer_running = true; + xhci_dbg(xhci, "Start the primary HCD\n"); retval = xhci_run(hcd->primary_hcd); if (!retval) { @@ -894,10 +1035,10 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) } /* step 4: set Run/Stop bit */ - command = xhci_readl(xhci, &xhci->op_regs->command); + command = readl(&xhci->op_regs->command); command |= CMD_RUN; - xhci_writel(xhci, command, &xhci->op_regs->command); - handshake(xhci, &xhci->op_regs->status, STS_HALT, + writel(command, &xhci->op_regs->command); + xhci_handshake(xhci, &xhci->op_regs->status, STS_HALT, 0, 250 * 1000); /* step 5: walk topology and initialize portsc, @@ -913,9 +1054,28 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) done: if (retval == 0) { - usb_hcd_resume_root_hub(hcd); - usb_hcd_resume_root_hub(xhci->shared_hcd); + /* Resume root hubs only when have pending events. */ + status = readl(&xhci->op_regs->status); + if (status & STS_EINT) { + usb_hcd_resume_root_hub(hcd); + usb_hcd_resume_root_hub(xhci->shared_hcd); + } } + + /* + * If system is subject to the Quirk, Compliance Mode Timer needs to + * be re-initialized Always after a system resume. Ports are subject + * to suffer the Compliance Mode issue again. It doesn't matter if + * ports have entered previously to U0 before system's suspension. + */ + if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && !comp_timer_running) + compliance_mode_recovery_timer_init(xhci); + + /* Re-enable port polling. */ + xhci_dbg(xhci, "%s: starting port polling.\n", __func__); + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + usb_hcd_poll_rh_status(hcd); + return retval; } #endif /* CONFIG_PM */ @@ -943,6 +1103,16 @@ unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) return index; } +/* The reverse operation to xhci_get_endpoint_index. Calculate the USB endpoint + * address from the XHCI endpoint index. + */ +unsigned int xhci_get_endpoint_address(unsigned int ep_index) +{ + unsigned int number = DIV_ROUND_UP(ep_index, 2); + unsigned int direction = ep_index % 2 ? USB_DIR_OUT : USB_DIR_IN; + return direction | number; +} + /* Find the flag for this endpoint (for use in the control context). Use the * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is * bit 1, etc. @@ -982,35 +1152,33 @@ static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_virt_device *virt_dev; if (!hcd || (check_ep && !ep) || !udev) { - printk(KERN_DEBUG "xHCI %s called with invalid args\n", - func); + pr_debug("xHCI %s called with invalid args\n", func); return -EINVAL; } if (!udev->parent) { - printk(KERN_DEBUG "xHCI %s called for root hub\n", - func); + pr_debug("xHCI %s called for root hub\n", func); return 0; } xhci = hcd_to_xhci(hcd); - if (xhci->xhc_state & XHCI_STATE_HALTED) - return -ENODEV; - if (check_virt_dev) { if (!udev->slot_id || !xhci->devs[udev->slot_id]) { - printk(KERN_DEBUG "xHCI %s called with unaddressed " - "device\n", func); + xhci_dbg(xhci, "xHCI %s called with unaddressed device\n", + func); return -EINVAL; } virt_dev = xhci->devs[udev->slot_id]; if (virt_dev->udev != udev) { - printk(KERN_DEBUG "xHCI %s called with udev and " + xhci_dbg(xhci, "xHCI %s called with udev and " "virt_dev does not match\n", func); return -EINVAL; } } + if (xhci->xhc_state & XHCI_STATE_HALTED) + return -ENODEV; + return 1; } @@ -1027,10 +1195,10 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, unsigned int ep_index, struct urb *urb) { - struct xhci_container_ctx *in_ctx; struct xhci_container_ctx *out_ctx; struct xhci_input_control_ctx *ctrl_ctx; struct xhci_ep_ctx *ep_ctx; + struct xhci_command *command; int max_packet_size; int hw_max_packet_size; int ret = 0; @@ -1040,41 +1208,60 @@ static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc); if (hw_max_packet_size != max_packet_size) { - xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); - xhci_dbg(xhci, "Max packet size in usb_device = %d\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Max Packet Size for ep 0 changed."); + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Max packet size in usb_device = %d", max_packet_size); - xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Max packet size in xHCI HW = %d", hw_max_packet_size); - xhci_dbg(xhci, "Issuing evaluate context command.\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Issuing evaluate context command."); + /* Set up the input context flags for the command */ + /* FIXME: This won't work if a non-default control endpoint + * changes max packet sizes. + */ + + command = xhci_alloc_command(xhci, false, true, GFP_KERNEL); + if (!command) + return -ENOMEM; + + command->in_ctx = xhci->devs[slot_id]->in_ctx; + ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + ret = -ENOMEM; + goto command_cleanup; + } /* Set up the modified control endpoint 0 */ xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, xhci->devs[slot_id]->out_ctx, ep_index); - in_ctx = xhci->devs[slot_id]->in_ctx; - ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); + + ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); - /* Set up the input context flags for the command */ - /* FIXME: This won't work if a non-default control endpoint - * changes max packet sizes. - */ - ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); ctrl_ctx->drop_flags = 0; xhci_dbg(xhci, "Slot %d input context\n", slot_id); - xhci_dbg_ctx(xhci, in_ctx, ep_index); + xhci_dbg_ctx(xhci, command->in_ctx, ep_index); xhci_dbg(xhci, "Slot %d output context\n", slot_id); xhci_dbg_ctx(xhci, out_ctx, ep_index); - ret = xhci_configure_endpoint(xhci, urb->dev, NULL, + ret = xhci_configure_endpoint(xhci, urb->dev, command, true, false); /* Clean up the input context for later use by bandwidth * functions. */ ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG); +command_cleanup: + kfree(command->completion); + kfree(command); } return ret; } @@ -1295,6 +1482,7 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) unsigned int ep_index; struct xhci_ring *ep_ring; struct xhci_virt_ep *ep; + struct xhci_command *command; xhci = hcd_to_xhci(hcd); spin_lock_irqsave(&xhci->lock, flags); @@ -1302,9 +1490,10 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) ret = usb_hcd_check_unlink_urb(hcd, urb, status); if (ret || !urb->hcpriv) goto done; - temp = xhci_readl(xhci, &xhci->op_regs->status); + temp = readl(&xhci->op_regs->status); if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) { - xhci_dbg(xhci, "HW died, freeing TD.\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, + "HW died, freeing TD."); urb_priv = urb->hcpriv; for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { td = urb_priv->td[i]; @@ -1322,8 +1511,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) } if ((xhci->xhc_state & XHCI_STATE_DYING) || (xhci->xhc_state & XHCI_STATE_HALTED)) { - xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " - "non-responsive xHCI host.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, + "Ep 0x%x: URB %p to be canceled on " + "non-responsive xHCI host.", urb->ep->desc.bEndpointAddress, urb); /* Let the stop endpoint command watchdog timer (which set this * state) finish cleaning up the endpoint TD lists. We must @@ -1344,8 +1534,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) urb_priv = urb->hcpriv; i = urb_priv->td_cnt; if (i < urb_priv->length) - xhci_dbg(xhci, "Cancel URB %p, dev %s, ep 0x%x, " - "starting at offset 0x%llx\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, + "Cancel URB %p, dev %s, ep 0x%x, " + "starting at offset 0x%llx", urb, urb->dev->devpath, urb->ep->desc.bEndpointAddress, (unsigned long long) xhci_trb_virt_to_dma( @@ -1361,12 +1552,14 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) * the first cancellation to be handled. */ if (!(ep->ep_state & EP_HALT_PENDING)) { + command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); ep->ep_state |= EP_HALT_PENDING; ep->stop_cmds_pending++; ep->stop_cmd_timer.expires = jiffies + XHCI_STOP_EP_CMD_TIMEOUT * HZ; add_timer(&ep->stop_cmd_timer); - xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0); + xhci_queue_stop_endpoint(xhci, command, urb->dev->slot_id, + ep_index, 0); xhci_ring_cmd_db(xhci); } done: @@ -1419,6 +1612,12 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, in_ctx = xhci->devs[udev->slot_id]->in_ctx; out_ctx = xhci->devs[udev->slot_id]->out_ctx; ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return 0; + } + ep_index = xhci_get_endpoint_index(&ep->desc); ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); /* If the HC already knows the endpoint is disabled, @@ -1479,7 +1678,6 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_hcd *xhci; struct xhci_container_ctx *in_ctx, *out_ctx; unsigned int ep_index; - struct xhci_ep_ctx *ep_ctx; struct xhci_slot_ctx *slot_ctx; struct xhci_input_control_ctx *ctrl_ctx; u32 added_ctxs; @@ -1514,9 +1712,13 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, in_ctx = virt_dev->in_ctx; out_ctx = virt_dev->out_ctx; ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); - ep_index = xhci_get_endpoint_index(&ep->desc); - ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return 0; + } + ep_index = xhci_get_endpoint_index(&ep->desc); /* If this endpoint is already in use, and the upper layers are trying * to add it again without dropping it, reject the addition. */ @@ -1589,12 +1791,18 @@ static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *vir struct xhci_slot_ctx *slot_ctx; int i; + ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return; + } + /* When a device's add flag and drop flag are zero, any subsequent * configure endpoint command will leave that endpoint's state * untouched. Make sure we don't leave any old state in the input * endpoint contexts. */ - ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); ctrl_ctx->drop_flags = 0; ctrl_ctx->add_flags = 0; slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); @@ -1616,6 +1824,11 @@ static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, int ret; switch (*cmd_status) { + case COMP_CMD_ABORT: + case COMP_CMD_STOP: + xhci_warn(xhci, "Timeout while waiting for configure endpoint command\n"); + ret = -ETIME; + break; case COMP_ENOMEM: dev_warn(&udev->dev, "Not enough host controller resources " "for new device state.\n"); @@ -1642,7 +1855,8 @@ static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, ret = -ENODEV; break; case COMP_SUCCESS: - dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Successful Endpoint Configure command"); ret = 0; break; default: @@ -1661,6 +1875,11 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; switch (*cmd_status) { + case COMP_CMD_ABORT: + case COMP_CMD_STOP: + xhci_warn(xhci, "Timeout while waiting for evaluate context command\n"); + ret = -ETIME; + break; case COMP_EINVAL: dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " "context command.\n"); @@ -1669,6 +1888,8 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci, case COMP_EBADSLT: dev_warn(&udev->dev, "WARN: slot not enabled for" "evaluate context command.\n"); + ret = -EINVAL; + break; case COMP_CTX_STATE: dev_warn(&udev->dev, "WARN: invalid context state for " "evaluate context command.\n"); @@ -1686,7 +1907,8 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci, ret = -EINVAL; break; case COMP_SUCCESS: - dev_dbg(&udev->dev, "Successful evaluate context command\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Successful evaluate context command"); ret = 0; break; default: @@ -1699,19 +1921,17 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci, } static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, - struct xhci_container_ctx *in_ctx) + struct xhci_input_control_ctx *ctrl_ctx) { - struct xhci_input_control_ctx *ctrl_ctx; u32 valid_add_flags; u32 valid_drop_flags; - ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); /* Ignore the slot flag (bit 0), and the default control endpoint flag * (bit 1). The default control endpoint is added during the Address * Device command and is never removed until the slot is disabled. */ - valid_add_flags = ctrl_ctx->add_flags >> 2; - valid_drop_flags = ctrl_ctx->drop_flags >> 2; + valid_add_flags = le32_to_cpu(ctrl_ctx->add_flags) >> 2; + valid_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags) >> 2; /* Use hweight32 to count the number of ones in the add flags, or * number of endpoints added. Don't count endpoints that are changed @@ -1722,15 +1942,13 @@ static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, } static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, - struct xhci_container_ctx *in_ctx) + struct xhci_input_control_ctx *ctrl_ctx) { - struct xhci_input_control_ctx *ctrl_ctx; u32 valid_add_flags; u32 valid_drop_flags; - ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); - valid_add_flags = ctrl_ctx->add_flags >> 2; - valid_drop_flags = ctrl_ctx->drop_flags >> 2; + valid_add_flags = le32_to_cpu(ctrl_ctx->add_flags) >> 2; + valid_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags) >> 2; return hweight32(valid_drop_flags) - hweight32(valid_add_flags & valid_drop_flags); @@ -1750,20 +1968,22 @@ static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, * Must be called with xhci->lock held. */ static int xhci_reserve_host_resources(struct xhci_hcd *xhci, - struct xhci_container_ctx *in_ctx) + struct xhci_input_control_ctx *ctrl_ctx) { u32 added_eps; - added_eps = xhci_count_num_new_endpoints(xhci, in_ctx); + added_eps = xhci_count_num_new_endpoints(xhci, ctrl_ctx); if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) { - xhci_dbg(xhci, "Not enough ep ctxs: " - "%u active, need to add %u, limit is %u.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Not enough ep ctxs: " + "%u active, need to add %u, limit is %u.", xhci->num_active_eps, added_eps, xhci->limit_active_eps); return -ENOMEM; } xhci->num_active_eps += added_eps; - xhci_dbg(xhci, "Adding %u ep ctxs, %u now active.\n", added_eps, + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Adding %u ep ctxs, %u now active.", added_eps, xhci->num_active_eps); return 0; } @@ -1775,13 +1995,14 @@ static int xhci_reserve_host_resources(struct xhci_hcd *xhci, * Must be called with xhci->lock held. */ static void xhci_free_host_resources(struct xhci_hcd *xhci, - struct xhci_container_ctx *in_ctx) + struct xhci_input_control_ctx *ctrl_ctx) { u32 num_failed_eps; - num_failed_eps = xhci_count_num_new_endpoints(xhci, in_ctx); + num_failed_eps = xhci_count_num_new_endpoints(xhci, ctrl_ctx); xhci->num_active_eps -= num_failed_eps; - xhci_dbg(xhci, "Removing %u failed ep ctxs, %u now active.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Removing %u failed ep ctxs, %u now active.", num_failed_eps, xhci->num_active_eps); } @@ -1793,19 +2014,20 @@ static void xhci_free_host_resources(struct xhci_hcd *xhci, * Must be called with xhci->lock held. */ static void xhci_finish_resource_reservation(struct xhci_hcd *xhci, - struct xhci_container_ctx *in_ctx) + struct xhci_input_control_ctx *ctrl_ctx) { u32 num_dropped_eps; - num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, in_ctx); + num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, ctrl_ctx); xhci->num_active_eps -= num_dropped_eps; if (num_dropped_eps) - xhci_dbg(xhci, "Removing %u dropped ep ctxs, %u now active.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Removing %u dropped ep ctxs, %u now active.", num_dropped_eps, xhci->num_active_eps); } -unsigned int xhci_get_block_size(struct usb_device *udev) +static unsigned int xhci_get_block_size(struct usb_device *udev) { switch (udev->speed) { case USB_SPEED_LOW: @@ -1823,7 +2045,8 @@ unsigned int xhci_get_block_size(struct usb_device *udev) } } -unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw) +static unsigned int +xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw) { if (interval_bw->overhead[LS_OVERHEAD_TYPE]) return LS_OVERHEAD; @@ -1960,18 +2183,21 @@ static int xhci_check_bw_table(struct xhci_hcd *xhci, * that the HS bus has enough bandwidth if we are activing a new TT. */ if (virt_dev->tt_info) { - xhci_dbg(xhci, "Recalculating BW for rootport %u\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Recalculating BW for rootport %u", virt_dev->real_port); if (xhci_check_tt_bw_table(xhci, virt_dev, old_active_eps)) { xhci_warn(xhci, "Not enough bandwidth on HS bus for " "newly activated TT.\n"); return -ENOMEM; } - xhci_dbg(xhci, "Recalculating BW for TT slot %u port %u\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Recalculating BW for TT slot %u port %u", virt_dev->tt_info->slot_id, virt_dev->tt_info->ttport); } else { - xhci_dbg(xhci, "Recalculating BW for rootport %u\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Recalculating BW for rootport %u", virt_dev->real_port); } @@ -2079,8 +2305,9 @@ static int xhci_check_bw_table(struct xhci_hcd *xhci, xhci->rh_bw[port_index].num_active_tts; } - xhci_dbg(xhci, "Final bandwidth: %u, Limit: %u, Reserved: %u, " - "Available: %u " "percent\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Final bandwidth: %u, Limit: %u, Reserved: %u, " + "Available: %u " "percent", bw_used, max_bandwidth, bw_reserved, (max_bandwidth - bw_used - bw_reserved) * 100 / max_bandwidth); @@ -2105,7 +2332,7 @@ static bool xhci_is_async_ep(unsigned int ep_type) static bool xhci_is_sync_in_ep(unsigned int ep_type) { - return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP); + return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP); } static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) @@ -2291,6 +2518,11 @@ static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, old_active_eps = virt_dev->tt_info->active_eps; ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return -ENOMEM; + } for (i = 0; i < 31; i++) { if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) @@ -2372,23 +2604,26 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, bool ctx_change, bool must_succeed) { int ret; - int timeleft; unsigned long flags; - struct xhci_container_ctx *in_ctx; - struct completion *cmd_completion; - u32 *cmd_status; + struct xhci_input_control_ctx *ctrl_ctx; struct xhci_virt_device *virt_dev; + if (!command) + return -EINVAL; + spin_lock_irqsave(&xhci->lock, flags); virt_dev = xhci->devs[udev->slot_id]; - if (command) - in_ctx = command->in_ctx; - else - in_ctx = virt_dev->in_ctx; + ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); + if (!ctrl_ctx) { + spin_unlock_irqrestore(&xhci->lock, flags); + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return -ENOMEM; + } if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && - xhci_reserve_host_resources(xhci, in_ctx)) { + xhci_reserve_host_resources(xhci, ctrl_ctx)) { spin_unlock_irqrestore(&xhci->lock, flags); xhci_warn(xhci, "Not enough host resources, " "active endpoint contexts = %u\n", @@ -2396,69 +2631,42 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, return -ENOMEM; } if ((xhci->quirks & XHCI_SW_BW_CHECKING) && - xhci_reserve_bandwidth(xhci, virt_dev, in_ctx)) { + xhci_reserve_bandwidth(xhci, virt_dev, command->in_ctx)) { if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) - xhci_free_host_resources(xhci, in_ctx); + xhci_free_host_resources(xhci, ctrl_ctx); spin_unlock_irqrestore(&xhci->lock, flags); xhci_warn(xhci, "Not enough bandwidth\n"); return -ENOMEM; } - if (command) { - cmd_completion = command->completion; - cmd_status = &command->status; - command->command_trb = xhci->cmd_ring->enqueue; - - /* Enqueue pointer can be left pointing to the link TRB, - * we must handle that - */ - if (TRB_TYPE_LINK_LE32(command->command_trb->link.control)) - command->command_trb = - xhci->cmd_ring->enq_seg->next->trbs; - - list_add_tail(&command->cmd_list, &virt_dev->cmd_list); - } else { - cmd_completion = &virt_dev->cmd_completion; - cmd_status = &virt_dev->cmd_status; - } - init_completion(cmd_completion); - if (!ctx_change) - ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, + ret = xhci_queue_configure_endpoint(xhci, command, + command->in_ctx->dma, udev->slot_id, must_succeed); else - ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, - udev->slot_id); + ret = xhci_queue_evaluate_context(xhci, command, + command->in_ctx->dma, + udev->slot_id, must_succeed); if (ret < 0) { - if (command) - list_del(&command->cmd_list); if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) - xhci_free_host_resources(xhci, in_ctx); + xhci_free_host_resources(xhci, ctrl_ctx); spin_unlock_irqrestore(&xhci->lock, flags); - xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "FIXME allocate a new ring segment"); return -ENOMEM; } xhci_ring_cmd_db(xhci); spin_unlock_irqrestore(&xhci->lock, flags); /* Wait for the configure endpoint command to complete */ - timeleft = wait_for_completion_interruptible_timeout( - cmd_completion, - USB_CTRL_SET_TIMEOUT); - if (timeleft <= 0) { - xhci_warn(xhci, "%s while waiting for %s command\n", - timeleft == 0 ? "Timeout" : "Signal", - ctx_change == 0 ? - "configure endpoint" : - "evaluate context"); - /* FIXME cancel the configure endpoint command */ - return -ETIME; - } + wait_for_completion(command->completion); if (!ctx_change) - ret = xhci_configure_endpoint_result(xhci, udev, cmd_status); + ret = xhci_configure_endpoint_result(xhci, udev, + &command->status); else - ret = xhci_evaluate_context_result(xhci, udev, cmd_status); + ret = xhci_evaluate_context_result(xhci, udev, + &command->status); if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { spin_lock_irqsave(&xhci->lock, flags); @@ -2466,14 +2674,28 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, * Otherwise, clean up the estimate to include dropped eps. */ if (ret) - xhci_free_host_resources(xhci, in_ctx); + xhci_free_host_resources(xhci, ctrl_ctx); else - xhci_finish_resource_reservation(xhci, in_ctx); + xhci_finish_resource_reservation(xhci, ctrl_ctx); spin_unlock_irqrestore(&xhci->lock, flags); } return ret; } +static void xhci_check_bw_drop_ep_streams(struct xhci_hcd *xhci, + struct xhci_virt_device *vdev, int i) +{ + struct xhci_virt_ep *ep = &vdev->eps[i]; + + if (ep->ep_state & EP_HAS_STREAMS) { + xhci_warn(xhci, "WARN: endpoint 0x%02x has streams on set_interface, freeing streams.\n", + xhci_get_endpoint_address(i)); + xhci_free_stream_info(xhci, ep->stream_info); + ep->stream_info = NULL; + ep->ep_state &= ~EP_HAS_STREAMS; + } +} + /* Called after one or more calls to xhci_add_endpoint() or * xhci_drop_endpoint(). If this call fails, the USB core is expected * to call xhci_reset_bandwidth(). @@ -2492,6 +2714,7 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) struct xhci_virt_device *virt_dev; struct xhci_input_control_ctx *ctrl_ctx; struct xhci_slot_ctx *slot_ctx; + struct xhci_command *command; ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); if (ret <= 0) @@ -2503,28 +2726,40 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); virt_dev = xhci->devs[udev->slot_id]; + command = xhci_alloc_command(xhci, false, true, GFP_KERNEL); + if (!command) + return -ENOMEM; + + command->in_ctx = virt_dev->in_ctx; + /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ - ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); + ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + ret = -ENOMEM; + goto command_cleanup; + } ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG); ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG)); /* Don't issue the command if there's no endpoints to update. */ if (ctrl_ctx->add_flags == cpu_to_le32(SLOT_FLAG) && - ctrl_ctx->drop_flags == 0) - return 0; - + ctrl_ctx->drop_flags == 0) { + ret = 0; + goto command_cleanup; + } xhci_dbg(xhci, "New Input Control Context:\n"); slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); xhci_dbg_ctx(xhci, virt_dev->in_ctx, LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); - ret = xhci_configure_endpoint(xhci, udev, NULL, + ret = xhci_configure_endpoint(xhci, udev, command, false, false); - if (ret) { + if (ret) /* Callee should call reset_bandwidth() */ - return ret; - } + goto command_cleanup; xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); xhci_dbg_ctx(xhci, virt_dev->out_ctx, @@ -2533,8 +2768,10 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) /* Free any rings that were dropped, but not changed. */ for (i = 1; i < 31; ++i) { if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) && - !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) + !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) { xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); + xhci_check_bw_drop_ep_streams(xhci, virt_dev, i); + } } xhci_zero_in_ctx(xhci, virt_dev); /* @@ -2550,9 +2787,13 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) if (virt_dev->eps[i].ring) { xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); } + xhci_check_bw_drop_ep_streams(xhci, virt_dev, i); virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; virt_dev->eps[i].new_ring = NULL; } +command_cleanup: + kfree(command->completion); + kfree(command); return ret; } @@ -2583,10 +2824,9 @@ void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, struct xhci_container_ctx *in_ctx, struct xhci_container_ctx *out_ctx, + struct xhci_input_control_ctx *ctrl_ctx, u32 add_flags, u32 drop_flags) { - struct xhci_input_control_ctx *ctrl_ctx; - ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); ctrl_ctx->add_flags = cpu_to_le32(add_flags); ctrl_ctx->drop_flags = cpu_to_le32(drop_flags); xhci_slot_copy(xhci, in_ctx, out_ctx); @@ -2600,14 +2840,22 @@ static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, unsigned int slot_id, unsigned int ep_index, struct xhci_dequeue_state *deq_state) { + struct xhci_input_control_ctx *ctrl_ctx; struct xhci_container_ctx *in_ctx; struct xhci_ep_ctx *ep_ctx; u32 added_ctxs; dma_addr_t addr; + in_ctx = xhci->devs[slot_id]->in_ctx; + ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return; + } + xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, xhci->devs[slot_id]->out_ctx, ep_index); - in_ctx = xhci->devs[slot_id]->in_ctx; ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, deq_state->new_deq_ptr); @@ -2623,7 +2871,8 @@ static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, - xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); + xhci->devs[slot_id]->out_ctx, ctrl_ctx, + added_ctxs, added_ctxs); } void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, @@ -2632,7 +2881,8 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, struct xhci_dequeue_state deq_state; struct xhci_virt_ep *ep; - xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, + "Cleaning up stalled endpoint ring"); ep = &xhci->devs[udev->slot_id]->eps[ep_index]; /* We need to move the HW's dequeue pointer past this TD, * or it will attempt to resend it on the next doorbell ring. @@ -2645,8 +2895,14 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, * issue a configure endpoint command later. */ if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { - xhci_dbg(xhci, "Queueing new dequeue state\n"); - xhci_queue_new_dequeue_state(xhci, udev->slot_id, + struct xhci_command *command; + /* Can't sleep if we're called from cleanup_halted_endpoint() */ + command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); + if (!command) + return; + xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, + "Queueing new dequeue state"); + xhci_queue_new_dequeue_state(xhci, command, udev->slot_id, ep_index, ep->stopped_stream, &deq_state); } else { /* Better hope no one uses the input context between now and the @@ -2654,8 +2910,9 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, * XXX: No idea how this hardware will react when stream rings * are enabled. */ - xhci_dbg(xhci, "Setting up input context for " - "configure endpoint command\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Setting up input context for " + "configure endpoint command"); xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, ep_index, &deq_state); } @@ -2676,6 +2933,7 @@ void xhci_endpoint_reset(struct usb_hcd *hcd, unsigned long flags; int ret; struct xhci_virt_ep *virt_ep; + struct xhci_command *command; xhci = hcd_to_xhci(hcd); udev = (struct usb_device *) ep->hcpriv; @@ -2687,18 +2945,25 @@ void xhci_endpoint_reset(struct usb_hcd *hcd, ep_index = xhci_get_endpoint_index(&ep->desc); virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; if (!virt_ep->stopped_td) { - xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", - ep->desc.bEndpointAddress); + xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, + "Endpoint 0x%x not halted, refusing to reset.", + ep->desc.bEndpointAddress); return; } if (usb_endpoint_xfer_control(&ep->desc)) { - xhci_dbg(xhci, "Control endpoint stall already handled.\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, + "Control endpoint stall already handled."); return; } - xhci_dbg(xhci, "Queueing reset endpoint command\n"); + command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); + if (!command) + return; + + xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, + "Queueing reset endpoint command"); spin_lock_irqsave(&xhci->lock, flags); - ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); + ret = xhci_queue_reset_ep(xhci, command, udev->slot_id, ep_index); /* * Can't change the ring dequeue pointer until it's transitioned to the * stopped state, which is only upon a successful reset endpoint @@ -2710,7 +2975,6 @@ void xhci_endpoint_reset(struct usb_hcd *hcd, xhci_ring_cmd_db(xhci); } virt_ep->stopped_td = NULL; - virt_ep->stopped_trb = NULL; virt_ep->stopped_stream = 0; spin_unlock_irqrestore(&xhci->lock, flags); @@ -2731,7 +2995,7 @@ static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); if (ret <= 0) return -EINVAL; - if (ep->ss_ep_comp.bmAttributes == 0) { + if (usb_ss_max_streams(&ep->ss_ep_comp) == 0) { xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" " descriptor for ep 0x%x does not support streams\n", ep->desc.bEndpointAddress); @@ -2836,8 +3100,8 @@ static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, /* Are streams already being freed for the endpoint? */ if (ep_state & EP_GETTING_NO_STREAMS) { xhci_warn(xhci, "WARN Can't disable streams for " - "endpoint 0x%x\n, " - "streams are being disabled already.", + "endpoint 0x%x, " + "streams are being disabled already\n", eps[i]->desc.bEndpointAddress); return 0; } @@ -2845,8 +3109,8 @@ static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, if (!(ep_state & EP_HAS_STREAMS) && !(ep_state & EP_GETTING_STREAMS)) { xhci_warn(xhci, "WARN Can't disable streams for " - "endpoint 0x%x\n, " - "streams are already disabled!", + "endpoint 0x%x, " + "streams are already disabled!\n", eps[i]->desc.bEndpointAddress); xhci_warn(xhci, "WARN xhci_free_streams() called " "with non-streams endpoint\n"); @@ -2881,6 +3145,7 @@ int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_hcd *xhci; struct xhci_virt_device *vdev; struct xhci_command *config_cmd; + struct xhci_input_control_ctx *ctrl_ctx; unsigned int ep_index; unsigned int num_stream_ctxs; unsigned long flags; @@ -2897,11 +3162,24 @@ int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", num_streams); + /* MaxPSASize value 0 (2 streams) means streams are not supported */ + if (HCC_MAX_PSA(xhci->hcc_params) < 4) { + xhci_dbg(xhci, "xHCI controller does not support streams.\n"); + return -ENOSYS; + } + config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); if (!config_cmd) { xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); return -ENOMEM; } + ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + xhci_free_command(xhci, config_cmd); + return -ENOMEM; + } /* Check to make sure all endpoints are not already configured for * streams. While we're at it, find the maximum number of streams that @@ -2968,7 +3246,8 @@ int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, * and add the updated copy from the input context. */ xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, - vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); + vdev->out_ctx, ctrl_ctx, + changed_ep_bitmask, changed_ep_bitmask); /* Issue and wait for the configure endpoint command */ ret = xhci_configure_endpoint(xhci, udev, config_cmd, @@ -3026,6 +3305,7 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_hcd *xhci; struct xhci_virt_device *vdev; struct xhci_command *command; + struct xhci_input_control_ctx *ctrl_ctx; unsigned int ep_index; unsigned long flags; u32 changed_ep_bitmask; @@ -3048,6 +3328,14 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, */ ep_index = xhci_get_endpoint_index(&eps[0]->desc); command = vdev->eps[ep_index].stream_info->free_streams_command; + ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); + if (!ctrl_ctx) { + spin_unlock_irqrestore(&xhci->lock, flags); + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return -EINVAL; + } + for (i = 0; i < num_eps; i++) { struct xhci_ep_ctx *ep_ctx; @@ -3062,7 +3350,8 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, &vdev->eps[ep_index]); } xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, - vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); + vdev->out_ctx, ctrl_ctx, + changed_ep_bitmask, changed_ep_bitmask); spin_unlock_irqrestore(&xhci->lock, flags); /* Issue and wait for the configure endpoint command, @@ -3115,8 +3404,9 @@ void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, } xhci->num_active_eps -= num_dropped_eps; if (num_dropped_eps) - xhci_dbg(xhci, "Dropped %u ep ctxs, flags = 0x%x, " - "%u now active.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Dropped %u ep ctxs, flags = 0x%x, " + "%u now active.", num_dropped_eps, drop_flags, xhci->num_active_eps); } @@ -3147,7 +3437,6 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) unsigned int slot_id; struct xhci_virt_device *virt_dev; struct xhci_command *reset_device_cmd; - int timeleft; int last_freed_endpoint; struct xhci_slot_ctx *slot_ctx; int old_active_eps = 0; @@ -3204,20 +3493,10 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) /* Attempt to submit the Reset Device command to the command ring */ spin_lock_irqsave(&xhci->lock, flags); - reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; - /* Enqueue pointer can be left pointing to the link TRB, - * we must handle that - */ - if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control)) - reset_device_cmd->command_trb = - xhci->cmd_ring->enq_seg->next->trbs; - - list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); - ret = xhci_queue_reset_device(xhci, slot_id); + ret = xhci_queue_reset_device(xhci, reset_device_cmd, slot_id); if (ret) { xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); - list_del(&reset_device_cmd->cmd_list); spin_unlock_irqrestore(&xhci->lock, flags); goto command_cleanup; } @@ -3225,22 +3504,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) spin_unlock_irqrestore(&xhci->lock, flags); /* Wait for the Reset Device command to finish */ - timeleft = wait_for_completion_interruptible_timeout( - reset_device_cmd->completion, - USB_CTRL_SET_TIMEOUT); - if (timeleft <= 0) { - xhci_warn(xhci, "%s while waiting for reset device command\n", - timeleft == 0 ? "Timeout" : "Signal"); - spin_lock_irqsave(&xhci->lock, flags); - /* The timeout might have raced with the event ring handler, so - * only delete from the list if the item isn't poisoned. - */ - if (reset_device_cmd->cmd_list.next != LIST_POISON1) - list_del(&reset_device_cmd->cmd_list); - spin_unlock_irqrestore(&xhci->lock, flags); - ret = -ETIME; - goto command_cleanup; - } + wait_for_completion(reset_device_cmd->completion); /* The Reset Device command can't fail, according to the 0.95/0.96 spec, * unless we tried to reset a slot ID that wasn't enabled, @@ -3248,12 +3512,17 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) */ ret = reset_device_cmd->status; switch (ret) { + case COMP_CMD_ABORT: + case COMP_CMD_STOP: + xhci_warn(xhci, "Timeout waiting for reset device command\n"); + ret = -ETIME; + goto command_cleanup; case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ case COMP_CTX_STATE: /* 0.96 completion code for same thing */ - xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", + xhci_dbg(xhci, "Can't reset device (slot ID %u) in %s state\n", slot_id, xhci_get_slot_state(xhci, virt_dev->out_ctx)); - xhci_info(xhci, "Not freeing device rings.\n"); + xhci_dbg(xhci, "Not freeing device rings.\n"); /* Don't treat this as an error. May change my mind later. */ ret = 0; goto command_cleanup; @@ -3283,6 +3552,8 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) struct xhci_virt_ep *ep = &virt_dev->eps[i]; if (ep->ep_state & EP_HAS_STREAMS) { + xhci_warn(xhci, "WARN: endpoint 0x%02x has streams on device reset, freeing streams.\n", + xhci_get_endpoint_address(i)); xhci_free_stream_info(xhci, ep->stream_info); ep->stream_info = NULL; ep->ep_state &= ~EP_HAS_STREAMS; @@ -3325,13 +3596,30 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) unsigned long flags; u32 state; int i, ret; + struct xhci_command *command; + + command = xhci_alloc_command(xhci, false, false, GFP_KERNEL); + if (!command) + return; + +#ifndef CONFIG_USB_DEFAULT_PERSIST + /* + * We called pm_runtime_get_noresume when the device was attached. + * Decrement the counter here to allow controller to runtime suspend + * if no devices remain. + */ + if (xhci->quirks & XHCI_RESET_ON_RESUME) + pm_runtime_put_noidle(hcd->self.controller); +#endif ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); /* If the host is halted due to driver unload, we still need to free the * device. */ - if (ret <= 0 && ret != -ENODEV) + if (ret <= 0 && ret != -ENODEV) { + kfree(command); return; + } virt_dev = xhci->devs[udev->slot_id]; @@ -3341,28 +3629,26 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); } - if (udev->usb2_hw_lpm_enabled) { - xhci_set_usb2_hardware_lpm(hcd, udev, 0); - udev->usb2_hw_lpm_enabled = 0; - } - spin_lock_irqsave(&xhci->lock, flags); /* Don't disable the slot if the host controller is dead. */ - state = xhci_readl(xhci, &xhci->op_regs->status); + state = readl(&xhci->op_regs->status); if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || (xhci->xhc_state & XHCI_STATE_HALTED)) { xhci_free_virt_device(xhci, udev->slot_id); spin_unlock_irqrestore(&xhci->lock, flags); + kfree(command); return; } - if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { + if (xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT, + udev->slot_id)) { spin_unlock_irqrestore(&xhci->lock, flags); xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); return; } xhci_ring_cmd_db(xhci); spin_unlock_irqrestore(&xhci->lock, flags); + /* * Event command completion handler will free any data structures * associated with the slot. XXX Can free sleep? @@ -3378,13 +3664,15 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci) { if (xhci->num_active_eps + 1 > xhci->limit_active_eps) { - xhci_dbg(xhci, "Not enough ep ctxs: " - "%u active, need to add 1, limit is %u.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Not enough ep ctxs: " + "%u active, need to add 1, limit is %u.", xhci->num_active_eps, xhci->limit_active_eps); return -ENOMEM; } xhci->num_active_eps += 1; - xhci_dbg(xhci, "Adding 1 ep ctx, %u now active.\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, + "Adding 1 ep ctx, %u now active.", xhci->num_active_eps); return 0; } @@ -3398,31 +3686,33 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); unsigned long flags; - int timeleft; int ret; + struct xhci_command *command; + + command = xhci_alloc_command(xhci, false, false, GFP_KERNEL); + if (!command) + return 0; spin_lock_irqsave(&xhci->lock, flags); - ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); + command->completion = &xhci->addr_dev; + ret = xhci_queue_slot_control(xhci, command, TRB_ENABLE_SLOT, 0); if (ret) { spin_unlock_irqrestore(&xhci->lock, flags); xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); + kfree(command); return 0; } xhci_ring_cmd_db(xhci); spin_unlock_irqrestore(&xhci->lock, flags); - /* XXX: how much time for xHC slot assignment? */ - timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, - USB_CTRL_SET_TIMEOUT); - if (timeleft <= 0) { - xhci_warn(xhci, "%s while waiting for a slot\n", - timeleft == 0 ? "Timeout" : "Signal"); - /* FIXME cancel the enable slot request */ - return 0; - } + wait_for_completion(command->completion); - if (!xhci->slot_id) { + if (!xhci->slot_id || command->status != COMP_SUCCESS) { xhci_err(xhci, "Error while assigning device slot ID\n"); + xhci_err(xhci, "Max number of devices this xHCI host supports is %u.\n", + HCS_MAX_SLOTS( + readl(&xhci->cap_regs->hcs_params1))); + kfree(command); return 0; } @@ -3447,6 +3737,18 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) goto disable_slot; } udev->slot_id = xhci->slot_id; + +#ifndef CONFIG_USB_DEFAULT_PERSIST + /* + * If resetting upon resume, we can't put the controller into runtime + * suspend if there is a device attached. + */ + if (xhci->quirks & XHCI_RESET_ON_RESUME) + pm_runtime_get_noresume(hcd->self.controller); +#endif + + + kfree(command); /* Is this a LS or FS device under a HS hub? */ /* Hub or peripherial? */ return 1; @@ -3454,34 +3756,37 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) disable_slot: /* Disable slot, if we can do it without mem alloc */ spin_lock_irqsave(&xhci->lock, flags); - if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) + command->completion = NULL; + command->status = 0; + if (!xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT, + udev->slot_id)) xhci_ring_cmd_db(xhci); spin_unlock_irqrestore(&xhci->lock, flags); return 0; } /* - * Issue an Address Device command (which will issue a SetAddress request to - * the device). + * Issue an Address Device command and optionally send a corresponding + * SetAddress request to the device. * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so * we should only issue and wait on one address command at the same time. - * - * We add one to the device address issued by the hardware because the USB core - * uses address 1 for the root hubs (even though they're not really devices). */ -int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) +static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev, + enum xhci_setup_dev setup) { + const char *act = setup == SETUP_CONTEXT_ONLY ? "context" : "address"; unsigned long flags; - int timeleft; struct xhci_virt_device *virt_dev; int ret = 0; struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_slot_ctx *slot_ctx; struct xhci_input_control_ctx *ctrl_ctx; u64 temp_64; + struct xhci_command *command; if (!udev->slot_id) { - xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Bad Slot ID %d", udev->slot_id); return -EINVAL; } @@ -3498,7 +3803,21 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) return -EINVAL; } + command = xhci_alloc_command(xhci, false, false, GFP_KERNEL); + if (!command) + return -ENOMEM; + + command->in_ctx = virt_dev->in_ctx; + command->completion = &xhci->addr_dev; + slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); + ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + kfree(command); + return -EINVAL; + } /* * If this is the first Set Address since device plug-in or * virt_device realloaction after a resume with an xHCI power loss, @@ -3509,79 +3828,89 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) /* Otherwise, update the control endpoint ring enqueue pointer. */ else xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); - ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG); ctrl_ctx->drop_flags = 0; xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); + trace_xhci_address_ctx(xhci, virt_dev->in_ctx, + le32_to_cpu(slot_ctx->dev_info) >> 27); spin_lock_irqsave(&xhci->lock, flags); - ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, - udev->slot_id); + ret = xhci_queue_address_device(xhci, command, virt_dev->in_ctx->dma, + udev->slot_id, setup); if (ret) { spin_unlock_irqrestore(&xhci->lock, flags); - xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "FIXME: allocate a command ring segment"); + kfree(command); return ret; } xhci_ring_cmd_db(xhci); spin_unlock_irqrestore(&xhci->lock, flags); /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ - timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, - USB_CTRL_SET_TIMEOUT); + wait_for_completion(command->completion); + /* FIXME: From section 4.3.4: "Software shall be responsible for timing * the SetAddress() "recovery interval" required by USB and aborting the * command on a timeout. */ - if (timeleft <= 0) { - xhci_warn(xhci, "%s while waiting for address device command\n", - timeleft == 0 ? "Timeout" : "Signal"); - /* FIXME cancel the address device command */ - return -ETIME; - } - - switch (virt_dev->cmd_status) { + switch (command->status) { + case COMP_CMD_ABORT: + case COMP_CMD_STOP: + xhci_warn(xhci, "Timeout while waiting for setup device command\n"); + ret = -ETIME; + break; case COMP_CTX_STATE: case COMP_EBADSLT: - xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", - udev->slot_id); + xhci_err(xhci, "Setup ERROR: setup %s command for slot %d.\n", + act, udev->slot_id); ret = -EINVAL; break; case COMP_TX_ERR: - dev_warn(&udev->dev, "Device not responding to set address.\n"); + dev_warn(&udev->dev, "Device not responding to setup %s.\n", act); ret = -EPROTO; break; case COMP_DEV_ERR: - dev_warn(&udev->dev, "ERROR: Incompatible device for address " - "device command.\n"); + dev_warn(&udev->dev, + "ERROR: Incompatible device for setup %s command\n", act); ret = -ENODEV; break; case COMP_SUCCESS: - xhci_dbg(xhci, "Successful Address Device command\n"); + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Successful setup %s command", act); break; default: - xhci_err(xhci, "ERROR: unexpected command completion " - "code 0x%x.\n", virt_dev->cmd_status); + xhci_err(xhci, + "ERROR: unexpected setup %s command completion code 0x%x.\n", + act, command->status); xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); + trace_xhci_address_ctx(xhci, virt_dev->out_ctx, 1); ret = -EINVAL; break; } if (ret) { + kfree(command); return ret; } temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); - xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); - xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", - udev->slot_id, - &xhci->dcbaa->dev_context_ptrs[udev->slot_id], - (unsigned long long) - le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); - xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Op regs DCBAA ptr = %#016llx", temp_64); + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Slot ID %d dcbaa entry @%p = %#016llx", + udev->slot_id, + &xhci->dcbaa->dev_context_ptrs[udev->slot_id], + (unsigned long long) + le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Output Context DMA address = %#08llx", (unsigned long long)virt_dev->out_ctx->dma); xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); + trace_xhci_address_ctx(xhci, virt_dev->in_ctx, + le32_to_cpu(slot_ctx->dev_info) >> 27); xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); /* @@ -3589,177 +3918,170 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) * address given back to us by the HC. */ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); - /* Use kernel assigned address for devices; store xHC assigned - * address locally. */ - virt_dev->address = (le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK) - + 1; + trace_xhci_address_ctx(xhci, virt_dev->out_ctx, + le32_to_cpu(slot_ctx->dev_info) >> 27); /* Zero the input context control for later use */ ctrl_ctx->add_flags = 0; ctrl_ctx->drop_flags = 0; - xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address); - + xhci_dbg_trace(xhci, trace_xhci_dbg_address, + "Internal device address = %d", + le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK); + kfree(command); return 0; } -#ifdef CONFIG_USB_SUSPEND - -/* BESL to HIRD Encoding array for USB2 LPM */ -static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000, - 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000}; +int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) +{ + return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ADDRESS); +} -/* Calculate HIRD/BESL for USB2 PORTPMSC*/ -static int xhci_calculate_hird_besl(int u2del, bool use_besl) +int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev) { - int hird; + return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ONLY); +} - if (use_besl) { - for (hird = 0; hird < 16; hird++) { - if (xhci_besl_encoding[hird] >= u2del) - break; - } - } else { - if (u2del <= 50) - hird = 0; - else - hird = (u2del - 51) / 75 + 1; +/* + * Transfer the port index into real index in the HW port status + * registers. Caculate offset between the port's PORTSC register + * and port status base. Divide the number of per port register + * to get the real index. The raw port number bases 1. + */ +int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + __le32 __iomem *base_addr = &xhci->op_regs->port_status_base; + __le32 __iomem *addr; + int raw_port; - if (hird > 15) - hird = 15; - } + if (hcd->speed != HCD_USB3) + addr = xhci->usb2_ports[port1 - 1]; + else + addr = xhci->usb3_ports[port1 - 1]; - return hird; + raw_port = (addr - base_addr)/NUM_PORT_REGS + 1; + return raw_port; } -static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd, - struct usb_device *udev) +/* + * Issue an Evaluate Context command to change the Maximum Exit Latency in the + * slot context. If that succeeds, store the new MEL in the xhci_virt_device. + */ +static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci, + struct usb_device *udev, u16 max_exit_latency) { - struct xhci_hcd *xhci = hcd_to_xhci(hcd); - struct dev_info *dev_info; - __le32 __iomem **port_array; - __le32 __iomem *addr, *pm_addr; - u32 temp, dev_id; - unsigned int port_num; - unsigned long flags; - int u2del, hird; - int ret; - - if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support || - !udev->lpm_capable) - return -EINVAL; - - /* we only support lpm for non-hub device connected to root hub yet */ - if (!udev->parent || udev->parent->parent || - udev->descriptor.bDeviceClass == USB_CLASS_HUB) - return -EINVAL; + struct xhci_virt_device *virt_dev; + struct xhci_command *command; + struct xhci_input_control_ctx *ctrl_ctx; + struct xhci_slot_ctx *slot_ctx; + unsigned long flags; + int ret; spin_lock_irqsave(&xhci->lock, flags); + if (max_exit_latency == xhci->devs[udev->slot_id]->current_mel) { + spin_unlock_irqrestore(&xhci->lock, flags); + return 0; + } - /* Look for devices in lpm_failed_devs list */ - dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 | - le16_to_cpu(udev->descriptor.idProduct); - list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) { - if (dev_info->dev_id == dev_id) { - ret = -EINVAL; - goto finish; - } + /* Attempt to issue an Evaluate Context command to change the MEL. */ + virt_dev = xhci->devs[udev->slot_id]; + command = xhci->lpm_command; + ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); + if (!ctrl_ctx) { + spin_unlock_irqrestore(&xhci->lock, flags); + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + return -ENOMEM; } - port_array = xhci->usb2_ports; - port_num = udev->portnum - 1; + xhci_slot_copy(xhci, command->in_ctx, virt_dev->out_ctx); + spin_unlock_irqrestore(&xhci->lock, flags); - if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) { - xhci_dbg(xhci, "invalid port number %d\n", udev->portnum); - ret = -EINVAL; - goto finish; + ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); + slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx); + slot_ctx->dev_info2 &= cpu_to_le32(~((u32) MAX_EXIT)); + slot_ctx->dev_info2 |= cpu_to_le32(max_exit_latency); + + xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, + "Set up evaluate context for LPM MEL change."); + xhci_dbg(xhci, "Slot %u Input Context:\n", udev->slot_id); + xhci_dbg_ctx(xhci, command->in_ctx, 0); + + /* Issue and wait for the evaluate context command. */ + ret = xhci_configure_endpoint(xhci, udev, command, + true, true); + xhci_dbg(xhci, "Slot %u Output Context:\n", udev->slot_id); + xhci_dbg_ctx(xhci, virt_dev->out_ctx, 0); + + if (!ret) { + spin_lock_irqsave(&xhci->lock, flags); + virt_dev->current_mel = max_exit_latency; + spin_unlock_irqrestore(&xhci->lock, flags); } + return ret; +} - /* - * Test USB 2.0 software LPM. - * FIXME: some xHCI 1.0 hosts may implement a new register to set up - * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1 - * in the June 2011 errata release. - */ - xhci_dbg(xhci, "test port %d software LPM\n", port_num); - /* - * Set L1 Device Slot and HIRD/BESL. - * Check device's USB 2.0 extension descriptor to determine whether - * HIRD or BESL shoule be used. See USB2.0 LPM errata. - */ - pm_addr = port_array[port_num] + 1; - u2del = HCS_U2_LATENCY(xhci->hcs_params3); - if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2)) - hird = xhci_calculate_hird_besl(u2del, 1); - else - hird = xhci_calculate_hird_besl(u2del, 0); +#ifdef CONFIG_PM_RUNTIME - temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird); - xhci_writel(xhci, temp, pm_addr); +/* BESL to HIRD Encoding array for USB2 LPM */ +static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000, + 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000}; - /* Set port link state to U2(L1) */ - addr = port_array[port_num]; - xhci_set_link_state(xhci, port_array, port_num, XDEV_U2); +/* Calculate HIRD/BESL for USB2 PORTPMSC*/ +static int xhci_calculate_hird_besl(struct xhci_hcd *xhci, + struct usb_device *udev) +{ + int u2del, besl, besl_host; + int besl_device = 0; + u32 field; - /* wait for ACK */ - spin_unlock_irqrestore(&xhci->lock, flags); - msleep(10); - spin_lock_irqsave(&xhci->lock, flags); + u2del = HCS_U2_LATENCY(xhci->hcs_params3); + field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); - /* Check L1 Status */ - ret = handshake(xhci, pm_addr, PORT_L1S_MASK, PORT_L1S_SUCCESS, 125); - if (ret != -ETIMEDOUT) { - /* enter L1 successfully */ - temp = xhci_readl(xhci, addr); - xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n", - port_num, temp); - ret = 0; + if (field & USB_BESL_SUPPORT) { + for (besl_host = 0; besl_host < 16; besl_host++) { + if (xhci_besl_encoding[besl_host] >= u2del) + break; + } + /* Use baseline BESL value as default */ + if (field & USB_BESL_BASELINE_VALID) + besl_device = USB_GET_BESL_BASELINE(field); + else if (field & USB_BESL_DEEP_VALID) + besl_device = USB_GET_BESL_DEEP(field); } else { - temp = xhci_readl(xhci, pm_addr); - xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n", - port_num, temp & PORT_L1S_MASK); - ret = -EINVAL; + if (u2del <= 50) + besl_host = 0; + else + besl_host = (u2del - 51) / 75 + 1; } - /* Resume the port */ - xhci_set_link_state(xhci, port_array, port_num, XDEV_U0); + besl = besl_host + besl_device; + if (besl > 15) + besl = 15; - spin_unlock_irqrestore(&xhci->lock, flags); - msleep(10); - spin_lock_irqsave(&xhci->lock, flags); + return besl; +} - /* Clear PLC */ - xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC); +/* Calculate BESLD, L1 timeout and HIRDM for USB2 PORTHLPMC */ +static int xhci_calculate_usb2_hw_lpm_params(struct usb_device *udev) +{ + u32 field; + int l1; + int besld = 0; + int hirdm = 0; - /* Check PORTSC to make sure the device is in the right state */ - if (!ret) { - temp = xhci_readl(xhci, addr); - xhci_dbg(xhci, "resumed port %d status 0x%x\n", port_num, temp); - if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) || - (temp & PORT_PLS_MASK) != XDEV_U0) { - xhci_dbg(xhci, "port L1 resume fail\n"); - ret = -EINVAL; - } - } + field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); - if (ret) { - /* Insert dev to lpm_failed_devs list */ - xhci_warn(xhci, "device LPM test failed, may disconnect and " - "re-enumerate\n"); - dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC); - if (!dev_info) { - ret = -ENOMEM; - goto finish; - } - dev_info->dev_id = dev_id; - INIT_LIST_HEAD(&dev_info->list); - list_add(&dev_info->list, &xhci->lpm_failed_devs); - } else { - xhci_ring_device(xhci, udev->slot_id); + /* xHCI l1 is set in steps of 256us, xHCI 1.0 section 5.4.11.2 */ + l1 = udev->l1_params.timeout / 256; + + /* device has preferred BESLD */ + if (field & USB_BESL_DEEP_VALID) { + besld = USB_GET_BESL_DEEP(field); + hirdm = 1; } -finish: - spin_unlock_irqrestore(&xhci->lock, flags); - return ret; + return PORT_BESLD(besld) | PORT_L1_TIMEOUT(l1) | PORT_HIRDM(hirdm); } int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, @@ -3767,11 +4089,12 @@ int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, { struct xhci_hcd *xhci = hcd_to_xhci(hcd); __le32 __iomem **port_array; - __le32 __iomem *pm_addr; - u32 temp; + __le32 __iomem *pm_addr, *hlpm_addr; + u32 pm_val, hlpm_val, field; unsigned int port_num; unsigned long flags; - int u2del, hird; + int hird, exit_latency; + int ret; if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support || !udev->lpm_capable) @@ -3788,48 +4111,126 @@ int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, port_array = xhci->usb2_ports; port_num = udev->portnum - 1; - pm_addr = port_array[port_num] + 1; - temp = xhci_readl(xhci, pm_addr); + pm_addr = port_array[port_num] + PORTPMSC; + pm_val = readl(pm_addr); + hlpm_addr = port_array[port_num] + PORTHLPMC; + field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n", - enable ? "enable" : "disable", port_num); - - u2del = HCS_U2_LATENCY(xhci->hcs_params3); - if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2)) - hird = xhci_calculate_hird_besl(u2del, 1); - else - hird = xhci_calculate_hird_besl(u2del, 0); + enable ? "enable" : "disable", port_num + 1); if (enable) { - temp &= ~PORT_HIRD_MASK; - temp |= PORT_HIRD(hird) | PORT_RWE; - xhci_writel(xhci, temp, pm_addr); - temp = xhci_readl(xhci, pm_addr); - temp |= PORT_HLE; - xhci_writel(xhci, temp, pm_addr); + /* Host supports BESL timeout instead of HIRD */ + if (udev->usb2_hw_lpm_besl_capable) { + /* if device doesn't have a preferred BESL value use a + * default one which works with mixed HIRD and BESL + * systems. See XHCI_DEFAULT_BESL definition in xhci.h + */ + if ((field & USB_BESL_SUPPORT) && + (field & USB_BESL_BASELINE_VALID)) + hird = USB_GET_BESL_BASELINE(field); + else + hird = udev->l1_params.besl; + + exit_latency = xhci_besl_encoding[hird]; + spin_unlock_irqrestore(&xhci->lock, flags); + + /* USB 3.0 code dedicate one xhci->lpm_command->in_ctx + * input context for link powermanagement evaluate + * context commands. It is protected by hcd->bandwidth + * mutex and is shared by all devices. We need to set + * the max ext latency in USB 2 BESL LPM as well, so + * use the same mutex and xhci_change_max_exit_latency() + */ + mutex_lock(hcd->bandwidth_mutex); + ret = xhci_change_max_exit_latency(xhci, udev, + exit_latency); + mutex_unlock(hcd->bandwidth_mutex); + + if (ret < 0) + return ret; + spin_lock_irqsave(&xhci->lock, flags); + + hlpm_val = xhci_calculate_usb2_hw_lpm_params(udev); + writel(hlpm_val, hlpm_addr); + /* flush write */ + readl(hlpm_addr); + } else { + hird = xhci_calculate_hird_besl(xhci, udev); + } + + pm_val &= ~PORT_HIRD_MASK; + pm_val |= PORT_HIRD(hird) | PORT_RWE | PORT_L1DS(udev->slot_id); + writel(pm_val, pm_addr); + pm_val = readl(pm_addr); + pm_val |= PORT_HLE; + writel(pm_val, pm_addr); + /* flush write */ + readl(pm_addr); } else { - temp &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK); - xhci_writel(xhci, temp, pm_addr); + pm_val &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK | PORT_L1DS_MASK); + writel(pm_val, pm_addr); + /* flush write */ + readl(pm_addr); + if (udev->usb2_hw_lpm_besl_capable) { + spin_unlock_irqrestore(&xhci->lock, flags); + mutex_lock(hcd->bandwidth_mutex); + xhci_change_max_exit_latency(xhci, udev, 0); + mutex_unlock(hcd->bandwidth_mutex); + return 0; + } } spin_unlock_irqrestore(&xhci->lock, flags); return 0; } +/* check if a usb2 port supports a given extened capability protocol + * only USB2 ports extended protocol capability values are cached. + * Return 1 if capability is supported + */ +static int xhci_check_usb2_port_capability(struct xhci_hcd *xhci, int port, + unsigned capability) +{ + u32 port_offset, port_count; + int i; + + for (i = 0; i < xhci->num_ext_caps; i++) { + if (xhci->ext_caps[i] & capability) { + /* port offsets starts at 1 */ + port_offset = XHCI_EXT_PORT_OFF(xhci->ext_caps[i]) - 1; + port_count = XHCI_EXT_PORT_COUNT(xhci->ext_caps[i]); + if (port >= port_offset && + port < port_offset + port_count) + return 1; + } + } + return 0; +} + int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); - int ret; + int portnum = udev->portnum - 1; - ret = xhci_usb2_software_lpm_test(hcd, udev); - if (!ret) { - xhci_dbg(xhci, "software LPM test succeed\n"); - if (xhci->hw_lpm_support == 1) { - udev->usb2_hw_lpm_capable = 1; - ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1); - if (!ret) - udev->usb2_hw_lpm_enabled = 1; - } + if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support || + !udev->lpm_capable) + return 0; + + /* we only support lpm for non-hub device connected to root hub yet */ + if (!udev->parent || udev->parent->parent || + udev->descriptor.bDeviceClass == USB_CLASS_HUB) + return 0; + + if (xhci->hw_lpm_support == 1 && + xhci_check_usb2_port_capability( + xhci, portnum, XHCI_HLC)) { + udev->usb2_hw_lpm_capable = 1; + udev->l1_params.timeout = XHCI_L1_TIMEOUT; + udev->l1_params.besl = XHCI_DEFAULT_BESL; + if (xhci_check_usb2_port_capability(xhci, portnum, + XHCI_BLC)) + udev->usb2_hw_lpm_besl_capable = 1; } return 0; @@ -3848,7 +4249,425 @@ int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) return 0; } -#endif /* CONFIG_USB_SUSPEND */ +#endif /* CONFIG_PM_RUNTIME */ + +/*---------------------- USB 3.0 Link PM functions ------------------------*/ + +#ifdef CONFIG_PM +/* Service interval in nanoseconds = 2^(bInterval - 1) * 125us * 1000ns / 1us */ +static unsigned long long xhci_service_interval_to_ns( + struct usb_endpoint_descriptor *desc) +{ + return (1ULL << (desc->bInterval - 1)) * 125 * 1000; +} + +static u16 xhci_get_timeout_no_hub_lpm(struct usb_device *udev, + enum usb3_link_state state) +{ + unsigned long long sel; + unsigned long long pel; + unsigned int max_sel_pel; + char *state_name; + + switch (state) { + case USB3_LPM_U1: + /* Convert SEL and PEL stored in nanoseconds to microseconds */ + sel = DIV_ROUND_UP(udev->u1_params.sel, 1000); + pel = DIV_ROUND_UP(udev->u1_params.pel, 1000); + max_sel_pel = USB3_LPM_MAX_U1_SEL_PEL; + state_name = "U1"; + break; + case USB3_LPM_U2: + sel = DIV_ROUND_UP(udev->u2_params.sel, 1000); + pel = DIV_ROUND_UP(udev->u2_params.pel, 1000); + max_sel_pel = USB3_LPM_MAX_U2_SEL_PEL; + state_name = "U2"; + break; + default: + dev_warn(&udev->dev, "%s: Can't get timeout for non-U1 or U2 state.\n", + __func__); + return USB3_LPM_DISABLED; + } + + if (sel <= max_sel_pel && pel <= max_sel_pel) + return USB3_LPM_DEVICE_INITIATED; + + if (sel > max_sel_pel) + dev_dbg(&udev->dev, "Device-initiated %s disabled " + "due to long SEL %llu ms\n", + state_name, sel); + else + dev_dbg(&udev->dev, "Device-initiated %s disabled " + "due to long PEL %llu ms\n", + state_name, pel); + return USB3_LPM_DISABLED; +} + +/* Returns the hub-encoded U1 timeout value. + * The U1 timeout should be the maximum of the following values: + * - For control endpoints, U1 system exit latency (SEL) * 3 + * - For bulk endpoints, U1 SEL * 5 + * - For interrupt endpoints: + * - Notification EPs, U1 SEL * 3 + * - Periodic EPs, max(105% of bInterval, U1 SEL * 2) + * - For isochronous endpoints, max(105% of bInterval, U1 SEL * 2) + */ +static u16 xhci_calculate_intel_u1_timeout(struct usb_device *udev, + struct usb_endpoint_descriptor *desc) +{ + unsigned long long timeout_ns; + int ep_type; + int intr_type; + + ep_type = usb_endpoint_type(desc); + switch (ep_type) { + case USB_ENDPOINT_XFER_CONTROL: + timeout_ns = udev->u1_params.sel * 3; + break; + case USB_ENDPOINT_XFER_BULK: + timeout_ns = udev->u1_params.sel * 5; + break; + case USB_ENDPOINT_XFER_INT: + intr_type = usb_endpoint_interrupt_type(desc); + if (intr_type == USB_ENDPOINT_INTR_NOTIFICATION) { + timeout_ns = udev->u1_params.sel * 3; + break; + } + /* Otherwise the calculation is the same as isoc eps */ + case USB_ENDPOINT_XFER_ISOC: + timeout_ns = xhci_service_interval_to_ns(desc); + timeout_ns = DIV_ROUND_UP_ULL(timeout_ns * 105, 100); + if (timeout_ns < udev->u1_params.sel * 2) + timeout_ns = udev->u1_params.sel * 2; + break; + default: + return 0; + } + + /* The U1 timeout is encoded in 1us intervals. */ + timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 1000); + /* Don't return a timeout of zero, because that's USB3_LPM_DISABLED. */ + if (timeout_ns == USB3_LPM_DISABLED) + timeout_ns++; + + /* If the necessary timeout value is bigger than what we can set in the + * USB 3.0 hub, we have to disable hub-initiated U1. + */ + if (timeout_ns <= USB3_LPM_U1_MAX_TIMEOUT) + return timeout_ns; + dev_dbg(&udev->dev, "Hub-initiated U1 disabled " + "due to long timeout %llu ms\n", timeout_ns); + return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U1); +} + +/* Returns the hub-encoded U2 timeout value. + * The U2 timeout should be the maximum of: + * - 10 ms (to avoid the bandwidth impact on the scheduler) + * - largest bInterval of any active periodic endpoint (to avoid going + * into lower power link states between intervals). + * - the U2 Exit Latency of the device + */ +static u16 xhci_calculate_intel_u2_timeout(struct usb_device *udev, + struct usb_endpoint_descriptor *desc) +{ + unsigned long long timeout_ns; + unsigned long long u2_del_ns; + + timeout_ns = 10 * 1000 * 1000; + + if ((usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) && + (xhci_service_interval_to_ns(desc) > timeout_ns)) + timeout_ns = xhci_service_interval_to_ns(desc); + + u2_del_ns = le16_to_cpu(udev->bos->ss_cap->bU2DevExitLat) * 1000ULL; + if (u2_del_ns > timeout_ns) + timeout_ns = u2_del_ns; + + /* The U2 timeout is encoded in 256us intervals */ + timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 256 * 1000); + /* If the necessary timeout value is bigger than what we can set in the + * USB 3.0 hub, we have to disable hub-initiated U2. + */ + if (timeout_ns <= USB3_LPM_U2_MAX_TIMEOUT) + return timeout_ns; + dev_dbg(&udev->dev, "Hub-initiated U2 disabled " + "due to long timeout %llu ms\n", timeout_ns); + return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U2); +} + +static u16 xhci_call_host_update_timeout_for_endpoint(struct xhci_hcd *xhci, + struct usb_device *udev, + struct usb_endpoint_descriptor *desc, + enum usb3_link_state state, + u16 *timeout) +{ + if (state == USB3_LPM_U1) { + if (xhci->quirks & XHCI_INTEL_HOST) + return xhci_calculate_intel_u1_timeout(udev, desc); + } else { + if (xhci->quirks & XHCI_INTEL_HOST) + return xhci_calculate_intel_u2_timeout(udev, desc); + } + + return USB3_LPM_DISABLED; +} + +static int xhci_update_timeout_for_endpoint(struct xhci_hcd *xhci, + struct usb_device *udev, + struct usb_endpoint_descriptor *desc, + enum usb3_link_state state, + u16 *timeout) +{ + u16 alt_timeout; + + alt_timeout = xhci_call_host_update_timeout_for_endpoint(xhci, udev, + desc, state, timeout); + + /* If we found we can't enable hub-initiated LPM, or + * the U1 or U2 exit latency was too high to allow + * device-initiated LPM as well, just stop searching. + */ + if (alt_timeout == USB3_LPM_DISABLED || + alt_timeout == USB3_LPM_DEVICE_INITIATED) { + *timeout = alt_timeout; + return -E2BIG; + } + if (alt_timeout > *timeout) + *timeout = alt_timeout; + return 0; +} + +static int xhci_update_timeout_for_interface(struct xhci_hcd *xhci, + struct usb_device *udev, + struct usb_host_interface *alt, + enum usb3_link_state state, + u16 *timeout) +{ + int j; + + for (j = 0; j < alt->desc.bNumEndpoints; j++) { + if (xhci_update_timeout_for_endpoint(xhci, udev, + &alt->endpoint[j].desc, state, timeout)) + return -E2BIG; + continue; + } + return 0; +} + +static int xhci_check_intel_tier_policy(struct usb_device *udev, + enum usb3_link_state state) +{ + struct usb_device *parent; + unsigned int num_hubs; + + if (state == USB3_LPM_U2) + return 0; + + /* Don't enable U1 if the device is on a 2nd tier hub or lower. */ + for (parent = udev->parent, num_hubs = 0; parent->parent; + parent = parent->parent) + num_hubs++; + + if (num_hubs < 2) + return 0; + + dev_dbg(&udev->dev, "Disabling U1 link state for device" + " below second-tier hub.\n"); + dev_dbg(&udev->dev, "Plug device into first-tier hub " + "to decrease power consumption.\n"); + return -E2BIG; +} + +static int xhci_check_tier_policy(struct xhci_hcd *xhci, + struct usb_device *udev, + enum usb3_link_state state) +{ + if (xhci->quirks & XHCI_INTEL_HOST) + return xhci_check_intel_tier_policy(udev, state); + return -EINVAL; +} + +/* Returns the U1 or U2 timeout that should be enabled. + * If the tier check or timeout setting functions return with a non-zero exit + * code, that means the timeout value has been finalized and we shouldn't look + * at any more endpoints. + */ +static u16 xhci_calculate_lpm_timeout(struct usb_hcd *hcd, + struct usb_device *udev, enum usb3_link_state state) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct usb_host_config *config; + char *state_name; + int i; + u16 timeout = USB3_LPM_DISABLED; + + if (state == USB3_LPM_U1) + state_name = "U1"; + else if (state == USB3_LPM_U2) + state_name = "U2"; + else { + dev_warn(&udev->dev, "Can't enable unknown link state %i\n", + state); + return timeout; + } + + if (xhci_check_tier_policy(xhci, udev, state) < 0) + return timeout; + + /* Gather some information about the currently installed configuration + * and alternate interface settings. + */ + if (xhci_update_timeout_for_endpoint(xhci, udev, &udev->ep0.desc, + state, &timeout)) + return timeout; + + config = udev->actconfig; + if (!config) + return timeout; + + for (i = 0; i < config->desc.bNumInterfaces; i++) { + struct usb_driver *driver; + struct usb_interface *intf = config->interface[i]; + + if (!intf) + continue; + + /* Check if any currently bound drivers want hub-initiated LPM + * disabled. + */ + if (intf->dev.driver) { + driver = to_usb_driver(intf->dev.driver); + if (driver && driver->disable_hub_initiated_lpm) { + dev_dbg(&udev->dev, "Hub-initiated %s disabled " + "at request of driver %s\n", + state_name, driver->name); + return xhci_get_timeout_no_hub_lpm(udev, state); + } + } + + /* Not sure how this could happen... */ + if (!intf->cur_altsetting) + continue; + + if (xhci_update_timeout_for_interface(xhci, udev, + intf->cur_altsetting, + state, &timeout)) + return timeout; + } + return timeout; +} + +static int calculate_max_exit_latency(struct usb_device *udev, + enum usb3_link_state state_changed, + u16 hub_encoded_timeout) +{ + unsigned long long u1_mel_us = 0; + unsigned long long u2_mel_us = 0; + unsigned long long mel_us = 0; + bool disabling_u1; + bool disabling_u2; + bool enabling_u1; + bool enabling_u2; + + disabling_u1 = (state_changed == USB3_LPM_U1 && + hub_encoded_timeout == USB3_LPM_DISABLED); + disabling_u2 = (state_changed == USB3_LPM_U2 && + hub_encoded_timeout == USB3_LPM_DISABLED); + + enabling_u1 = (state_changed == USB3_LPM_U1 && + hub_encoded_timeout != USB3_LPM_DISABLED); + enabling_u2 = (state_changed == USB3_LPM_U2 && + hub_encoded_timeout != USB3_LPM_DISABLED); + + /* If U1 was already enabled and we're not disabling it, + * or we're going to enable U1, account for the U1 max exit latency. + */ + if ((udev->u1_params.timeout != USB3_LPM_DISABLED && !disabling_u1) || + enabling_u1) + u1_mel_us = DIV_ROUND_UP(udev->u1_params.mel, 1000); + if ((udev->u2_params.timeout != USB3_LPM_DISABLED && !disabling_u2) || + enabling_u2) + u2_mel_us = DIV_ROUND_UP(udev->u2_params.mel, 1000); + + if (u1_mel_us > u2_mel_us) + mel_us = u1_mel_us; + else + mel_us = u2_mel_us; + /* xHCI host controller max exit latency field is only 16 bits wide. */ + if (mel_us > MAX_EXIT) { + dev_warn(&udev->dev, "Link PM max exit latency of %lluus " + "is too big.\n", mel_us); + return -E2BIG; + } + return mel_us; +} + +/* Returns the USB3 hub-encoded value for the U1/U2 timeout. */ +int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, + struct usb_device *udev, enum usb3_link_state state) +{ + struct xhci_hcd *xhci; + u16 hub_encoded_timeout; + int mel; + int ret; + + xhci = hcd_to_xhci(hcd); + /* The LPM timeout values are pretty host-controller specific, so don't + * enable hub-initiated timeouts unless the vendor has provided + * information about their timeout algorithm. + */ + if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || + !xhci->devs[udev->slot_id]) + return USB3_LPM_DISABLED; + + hub_encoded_timeout = xhci_calculate_lpm_timeout(hcd, udev, state); + mel = calculate_max_exit_latency(udev, state, hub_encoded_timeout); + if (mel < 0) { + /* Max Exit Latency is too big, disable LPM. */ + hub_encoded_timeout = USB3_LPM_DISABLED; + mel = 0; + } + + ret = xhci_change_max_exit_latency(xhci, udev, mel); + if (ret) + return ret; + return hub_encoded_timeout; +} + +int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, + struct usb_device *udev, enum usb3_link_state state) +{ + struct xhci_hcd *xhci; + u16 mel; + int ret; + + xhci = hcd_to_xhci(hcd); + if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || + !xhci->devs[udev->slot_id]) + return 0; + + mel = calculate_max_exit_latency(udev, state, USB3_LPM_DISABLED); + ret = xhci_change_max_exit_latency(xhci, udev, mel); + if (ret) + return ret; + return 0; +} +#else /* CONFIG_PM */ + +int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, + struct usb_device *udev, enum usb3_link_state state) +{ + return USB3_LPM_DISABLED; +} + +int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, + struct usb_device *udev, enum usb3_link_state state) +{ + return 0; +} +#endif /* CONFIG_PM */ + +/*-------------------------------------------------------------------------*/ /* Once a hub descriptor is fetched for a device, we need to update the xHC's * internal data structures for the device. @@ -3879,6 +4698,13 @@ int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); return -ENOMEM; } + ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); + if (!ctrl_ctx) { + xhci_warn(xhci, "%s: Could not get input context, bad type.\n", + __func__); + xhci_free_command(xhci, config_cmd); + return -ENOMEM; + } spin_lock_irqsave(&xhci->lock, flags); if (hdev->speed == USB_SPEED_HIGH && @@ -3890,7 +4716,6 @@ int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, } xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); - ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); @@ -3949,7 +4774,7 @@ int xhci_get_frame(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); /* EHCI mods by the periodic size. Why? */ - return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; + return readl(&xhci->run_regs->microframe_index) >> 3; } int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) @@ -3957,9 +4782,15 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) struct xhci_hcd *xhci; struct device *dev = hcd->self.controller; int retval; - u32 temp; - hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2; + /* Accept arbitrarily long scatter-gather lists */ + hcd->self.sg_tablesize = ~0; + + /* support to build packet from discontinuous buffers */ + hcd->self.no_sg_constraint = 1; + + /* XHCI controllers don't stop the ep queue on short packets :| */ + hcd->self.no_stop_on_short = 1; if (usb_hcd_is_primary_hcd(hcd)) { xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL); @@ -3982,33 +4813,34 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) /* xHCI private pointer was set in xhci_pci_probe for the second * registered roothub. */ - xhci = hcd_to_xhci(hcd); - temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); - if (HCC_64BIT_ADDR(temp)) { - xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); - dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); - } else { - dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); - } return 0; } xhci->cap_regs = hcd->regs; xhci->op_regs = hcd->regs + - HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase)); + HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)); xhci->run_regs = hcd->regs + - (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK); + (readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK); /* Cache read-only capability registers */ - xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1); - xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2); - xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); - xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase); + xhci->hcs_params1 = readl(&xhci->cap_regs->hcs_params1); + xhci->hcs_params2 = readl(&xhci->cap_regs->hcs_params2); + xhci->hcs_params3 = readl(&xhci->cap_regs->hcs_params3); + xhci->hcc_params = readl(&xhci->cap_regs->hc_capbase); xhci->hci_version = HC_VERSION(xhci->hcc_params); - xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params); + xhci->hcc_params = readl(&xhci->cap_regs->hcc_params); xhci_print_registers(xhci); + xhci->quirks = quirks; + get_quirks(dev, xhci); + /* In xhci controllers which follow xhci 1.0 spec gives a spurious + * success event after a short transfer. This quirk will ignore such + * spurious event. + */ + if (xhci->hci_version > 0x96) + xhci->quirks |= XHCI_SPURIOUS_SUCCESS; + /* Make sure the HC is halted. */ retval = xhci_halt(xhci); if (retval) @@ -4021,12 +4853,12 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) goto error; xhci_dbg(xhci, "Reset complete\n"); - temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); - if (HCC_64BIT_ADDR(temp)) { + /* Set dma_mask and coherent_dma_mask to 64-bits, + * if xHC supports 64-bit addressing */ + if (HCC_64BIT_ADDR(xhci->hcc_params) && + !dma_set_mask(dev, DMA_BIT_MASK(64))) { xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); - dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); - } else { - dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); + dma_set_coherent_mask(dev, DMA_BIT_MASK(64)); } xhci_dbg(xhci, "Calling HCD init\n"); @@ -4051,9 +4883,14 @@ static int __init xhci_hcd_init(void) retval = xhci_register_pci(); if (retval < 0) { - printk(KERN_DEBUG "Problem registering PCI driver."); + pr_debug("Problem registering PCI driver.\n"); return retval; } + retval = xhci_register_plat(); + if (retval < 0) { + pr_debug("Problem registering platform driver.\n"); + goto unreg_pci; + } /* * Check the compiler generated sizes of structures that must be laid * out in specific ways for hardware access. @@ -4071,13 +4908,16 @@ static int __init xhci_hcd_init(void) BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); - BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); return 0; +unreg_pci: + xhci_unregister_pci(); + return retval; } module_init(xhci_hcd_init); static void __exit xhci_hcd_cleanup(void) { xhci_unregister_pci(); + xhci_unregister_plat(); } module_exit(xhci_hcd_cleanup); |