diff options
Diffstat (limited to 'drivers/xen/platform-pci.c')
| -rw-r--r-- | drivers/xen/platform-pci.c | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c index 5d7dcad0b0a0..1db82da56db6 100644 --- a/drivers/xen/platform-pci.c +++ b/drivers/xen/platform-pci.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /****************************************************************************** * platform-pci.c * @@ -8,20 +9,6 @@ * Copyright (c) 2005, Intel Corporation. * Copyright (c) 2007, XenSource Inc. * Copyright (c) 2010, Citrix - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * */ @@ -39,6 +26,8 @@ #define DRV_NAME "xen-platform-pci" +#define PCI_DEVICE_ID_XEN_PLATFORM_XS61 0x0002 + static unsigned long platform_mmio; static unsigned long platform_mmio_alloc; static unsigned long platform_mmiolen; @@ -67,7 +56,8 @@ static uint64_t get_callback_via(struct pci_dev *pdev) pin = pdev->pin; /* We don't know the GSI. Specify the PCI INTx line instead. */ - return ((uint64_t)0x01 << HVM_CALLBACK_VIA_TYPE_SHIFT) | /* PCI INTx identifier */ + return ((uint64_t)HVM_PARAM_CALLBACK_TYPE_PCI_INTX << + HVM_CALLBACK_VIA_TYPE_SHIFT) | ((uint64_t)pci_domain_nr(pdev->bus) << 32) | ((uint64_t)pdev->bus->number << 16) | ((uint64_t)(pdev->devfn & 0xff) << 8) | @@ -76,18 +66,17 @@ static uint64_t get_callback_via(struct pci_dev *pdev) static irqreturn_t do_hvm_evtchn_intr(int irq, void *dev_id) { - xen_hvm_evtchn_do_upcall(); - return IRQ_HANDLED; + return xen_evtchn_do_upcall(); } static int xen_allocate_irq(struct pci_dev *pdev) { return request_irq(pdev->irq, do_hvm_evtchn_intr, - IRQF_NOBALANCING | IRQF_TRIGGER_RISING, + IRQF_NOBALANCING | IRQF_SHARED, "xen-platform-pci", pdev); } -static int platform_pci_resume(struct pci_dev *pdev) +static int platform_pci_resume(struct device *dev) { int err; @@ -96,7 +85,7 @@ static int platform_pci_resume(struct pci_dev *pdev) err = xen_set_callback_via(callback_via); if (err) { - dev_err(&pdev->dev, "platform_pci_resume failure!\n"); + dev_err(dev, "platform_pci_resume failure!\n"); return err; } return 0; @@ -145,12 +134,19 @@ static int platform_pci_probe(struct pci_dev *pdev, dev_warn(&pdev->dev, "request_irq failed err=%d\n", ret); goto out; } + /* + * It doesn't strictly *have* to run on CPU0 but it sure + * as hell better process the event channel ports delivered + * to CPU0. + */ + irq_set_affinity(pdev->irq, cpumask_of(0)); + callback_via = get_callback_via(pdev); ret = xen_set_callback_via(callback_via); if (ret) { dev_warn(&pdev->dev, "Unable to set the evtchn callback " "err=%d\n", ret); - goto out; + goto irq_out; } } @@ -158,14 +154,16 @@ static int platform_pci_probe(struct pci_dev *pdev, grant_frames = alloc_xen_mmio(PAGE_SIZE * max_nr_gframes); ret = gnttab_setup_auto_xlat_frames(grant_frames); if (ret) - goto out; + goto irq_out; ret = gnttab_init(); if (ret) goto grant_out; - xenbus_probe(NULL); return 0; grant_out: gnttab_free_auto_xlat_frames(); +irq_out: + if (!xen_have_vector_callback) + free_irq(pdev->irq, pdev); out: pci_release_region(pdev, 0); mem_out: @@ -178,16 +176,22 @@ pci_out: static const struct pci_device_id platform_pci_tbl[] = { {PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM_XS61, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {0,} }; +static const struct dev_pm_ops platform_pm_ops = { + .resume_noirq = platform_pci_resume, +}; + static struct pci_driver platform_driver = { .name = DRV_NAME, .probe = platform_pci_probe, .id_table = platform_pci_tbl, -#ifdef CONFIG_PM - .resume_early = platform_pci_resume, -#endif + .driver = { + .pm = &platform_pm_ops, + }, }; builtin_pci_driver(platform_driver); |