/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * (C) Copyright 2006 Sylvain Munaut * * Bus glue for OHCI HC on the of_platform bus * * Modified for of_platform bus from ohci-sa1111.c * * This file is licenced under the GPL. */ #include #include #include #include #include static int ohci_ppc_of_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; if ((ret = ohci_init(ohci)) < 0) return ret; if ((ret = ohci_run(ohci)) < 0) { dev_err(hcd->self.controller, "can't start %s\n", hcd->self.bus_name); ohci_stop(hcd); return ret; } return 0; } static const struct hc_driver ohci_ppc_of_hc_driver = { .description = hcd_name, .product_desc = "OF OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_ppc_of_start, .stop = ohci_stop, .shutdown = ohci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static int ohci_hcd_ppc_of_probe(struct platform_device *op) { struct device_node *dn = op->dev.of_node; struct usb_hcd *hcd; struct ohci_hcd *ohci; struct resource res; int irq; int rv; int is_bigendian; struct device_node *np; if (usb_disabled()) return -ENODEV; is_bigendian = of_device_is_compatible(dn, "ohci-bigendian") || of_device_is_compatible(dn, "ohci-be"); dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); rv = of_address_to_resource(dn, 0, &res); if (rv) return rv; hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); if (!hcd) return -ENOMEM; hcd->rsrc_start = res.start; hcd->rsrc_len = resource_size(&res); hcd->regs = devm_ioremap_resource(&op->dev, &res); if (IS_ERR(hcd->regs)) { rv = PTR_ERR(hcd->regs); goto err_rmr; } irq = irq_of_parse_and_map(dn, 0); if (irq == NO_IRQ) { dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", __FILE__); rv = -EBUSY; goto err_rmr; } ohci = hcd_to_ohci(hcd); if (is_bigendian) { ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) ohci->flags |= OHCI_QUIRK_FRAME_NO; if (of_device_is_compatible(dn, "mpc5200-ohci")) ohci->flags |= OHCI_QUIRK_FRAME_NO; } ohci_hcd_init(ohci); rv = usb_add_hcd(hcd, irq, 0); if (rv == 0) { device_wakeup_enable(hcd->self.controller); return 0; } /* by now, 440epx is known to show usb_23 erratum */ np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); /* Work around - At this point ohci_run has executed, the * controller is running, everything, the root ports, etc., is * set up. If the ehci driver is loaded, put the ohci core in * the suspended state. The ehci driver will bring it out of * suspended state when / if a non-high speed USB device is * attached to the USB Host port. If the ehci driver is not * loaded, do nothing. request_mem_region is used to test if * the ehci driver is loaded. */ if (np != NULL) { if (!of_address_to_resource(np, 0, &res)) { if (!request_mem_region(res.start, 0x4, hcd_name)) { writel_be((readl_be(&ohci->regs->control) | OHCI_USB_SUSPEND), &ohci->regs->control); (void) readl_be(&ohci->regs->control); } else release_mem_region(res.start, 0x4); } else pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); } irq_dispose_mapping(irq); err_rmr: usb_put_hcd(hcd); return rv; } static int ohci_hcd_ppc_of_remove(struct platform_device *op) { struct usb_hcd *hcd = platform_get_drvdata(op); dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); usb_remove_hcd(hcd); irq_dispose_mapping(hcd->irq); usb_put_hcd(hcd); return 0; } static const struct of_device_id ohci_hcd_ppc_of_match[] = { #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE { .name = "usb", .compatible = "ohci-bigendian", }, { .name = "usb", .compatible = "ohci-be", }, #endif #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE { .name = "usb", .compatible = "ohci-littledian", }, { .name = "usb", .compatible = "ohci-le", }, #endif {}, }; MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) #error "No endianness selected for ppc-of-ohci" #endif static struct platform_driver ohci_hcd_ppc_of_driver = { .probe = ohci_hcd_ppc_of_probe, .remove = ohci_hcd_ppc_of_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "ppc-of-ohci", .of_match_table = ohci_hcd_ppc_of_match, }, }; cki@intel.com>2017-02-04 00:11:08 +0100 commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch) treec666f7a26b860674848949e39a610222b0723f89 /tools/perf/ui/progress.c parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/perf/ui/progress.c')