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-rw-r--r--arch/x86/pci/common.c18
-rw-r--r--arch/x86/pci/init.c13
-rw-r--r--arch/x86/pci/sta2x11-fixup.c7
-rw-r--r--arch/x86/pci/xen.c138
4 files changed, 141 insertions, 35 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index df1d95913d4e..3507f456fcd0 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -19,6 +19,7 @@
#include <asm/smp.h>
#include <asm/pci_x86.h>
#include <asm/setup.h>
+#include <asm/irqdomain.h>
unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
PCI_PROBE_MMCONF;
@@ -633,8 +634,9 @@ static void set_dev_domain_options(struct pci_dev *pdev)
int pcibios_add_device(struct pci_dev *dev)
{
- struct setup_data *data;
struct pci_setup_rom *rom;
+ struct irq_domain *msidom;
+ struct setup_data *data;
u64 pa_data;
pa_data = boot_params.hdr.setup_data;
@@ -661,6 +663,20 @@ int pcibios_add_device(struct pci_dev *dev)
memunmap(data);
}
set_dev_domain_options(dev);
+
+ /*
+ * Setup the initial MSI domain of the device. If the underlying
+ * bus has a PCI/MSI irqdomain associated use the bus domain,
+ * otherwise set the default domain. This ensures that special irq
+ * domains e.g. VMD are preserved. The default ensures initial
+ * operation if irq remapping is not active. If irq remapping is
+ * active it will overwrite the domain pointer when the device is
+ * associated to a remapping domain.
+ */
+ msidom = dev_get_msi_domain(&dev->bus->dev);
+ if (!msidom)
+ msidom = x86_pci_msi_default_domain;
+ dev_set_msi_domain(&dev->dev, msidom);
return 0;
}
diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
index 5fc617edf108..00bfa1ebad6c 100644
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -3,16 +3,17 @@
#include <linux/init.h>
#include <asm/pci_x86.h>
#include <asm/x86_init.h>
+#include <asm/irqdomain.h>
/* arch_initcall has too random ordering, so call the initializers
in the right sequence from here. */
static __init int pci_arch_init(void)
{
-#ifdef CONFIG_PCI_DIRECT
- int type = 0;
+ int type;
+
+ x86_create_pci_msi_domain();
type = pci_direct_probe();
-#endif
if (!(pci_probe & PCI_PROBE_NOEARLY))
pci_mmcfg_early_init();
@@ -20,18 +21,16 @@ static __init int pci_arch_init(void)
if (x86_init.pci.arch_init && !x86_init.pci.arch_init())
return 0;
-#ifdef CONFIG_PCI_BIOS
pci_pcbios_init();
-#endif
+
/*
* don't check for raw_pci_ops here because we want pcbios as last
* fallback, yet it's needed to run first to set pcibios_last_bus
* in case legacy PCI probing is used. otherwise detecting peer busses
* fails.
*/
-#ifdef CONFIG_PCI_DIRECT
pci_direct_init(type);
-#endif
+
if (!raw_pci_ops && !raw_pci_ext_ops)
printk(KERN_ERR
"PCI: Fatal: No config space access function found\n");
diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c
index c313d784efab..5701d5ba3df4 100644
--- a/arch/x86/pci/sta2x11-fixup.c
+++ b/arch/x86/pci/sta2x11-fixup.c
@@ -15,7 +15,6 @@
#include <asm/iommu.h>
#define STA2X11_SWIOTLB_SIZE (4*1024*1024)
-extern int swiotlb_late_init_with_default_size(size_t default_size);
/*
* We build a list of bus numbers that are under the ConneXt. The
@@ -133,7 +132,7 @@ static void sta2x11_map_ep(struct pci_dev *pdev)
struct sta2x11_instance *instance = sta2x11_pdev_to_instance(pdev);
struct device *dev = &pdev->dev;
u32 amba_base, max_amba_addr;
- int i;
+ int i, ret;
if (!instance)
return;
@@ -141,7 +140,9 @@ static void sta2x11_map_ep(struct pci_dev *pdev)
pci_read_config_dword(pdev, AHB_BASE(0), &amba_base);
max_amba_addr = amba_base + STA2X11_AMBA_SIZE - 1;
- dev->dma_pfn_offset = PFN_DOWN(-amba_base);
+ ret = dma_direct_set_offset(dev, 0, amba_base, STA2X11_AMBA_SIZE);
+ if (ret)
+ dev_err(dev, "sta2x11: could not set DMA offset\n");
dev->bus_dma_limit = max_amba_addr;
pci_set_consistent_dma_mask(pdev, max_amba_addr);
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 9f9aad42ccff..c552cd2d0632 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -26,6 +26,7 @@
#include <asm/xen/pci.h>
#include <asm/xen/cpuid.h>
#include <asm/apic.h>
+#include <asm/acpi.h>
#include <asm/i8259.h>
static int xen_pcifront_enable_irq(struct pci_dev *dev)
@@ -156,6 +157,13 @@ static int acpi_register_gsi_xen(struct device *dev, u32 gsi,
struct xen_pci_frontend_ops *xen_pci_frontend;
EXPORT_SYMBOL_GPL(xen_pci_frontend);
+struct xen_msi_ops {
+ int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
+ void (*teardown_msi_irqs)(struct pci_dev *dev);
+};
+
+static struct xen_msi_ops xen_msi_ops __ro_after_init;
+
static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
int irq, ret, i;
@@ -371,28 +379,122 @@ static void xen_initdom_restore_msi_irqs(struct pci_dev *dev)
WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret);
}
}
-#endif
+#else /* CONFIG_XEN_DOM0 */
+#define xen_initdom_setup_msi_irqs NULL
+#define xen_initdom_restore_msi_irqs NULL
+#endif /* !CONFIG_XEN_DOM0 */
static void xen_teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *msidesc;
+ int i;
+
+ for_each_pci_msi_entry(msidesc, dev) {
+ if (msidesc->irq) {
+ for (i = 0; i < msidesc->nvec_used; i++)
+ xen_destroy_irq(msidesc->irq + i);
+ }
+ }
+}
+
+static void xen_pv_teardown_msi_irqs(struct pci_dev *dev)
+{
+ struct msi_desc *msidesc = first_pci_msi_entry(dev);
- msidesc = first_pci_msi_entry(dev);
if (msidesc->msi_attrib.is_msix)
xen_pci_frontend_disable_msix(dev);
else
xen_pci_frontend_disable_msi(dev);
- /* Free the IRQ's and the msidesc using the generic code. */
- default_teardown_msi_irqs(dev);
+ xen_teardown_msi_irqs(dev);
}
-static void xen_teardown_msi_irq(unsigned int irq)
+static int xen_msi_domain_alloc_irqs(struct irq_domain *domain,
+ struct device *dev, int nvec)
{
- xen_destroy_irq(irq);
+ int type;
+
+ if (WARN_ON_ONCE(!dev_is_pci(dev)))
+ return -EINVAL;
+
+ if (first_msi_entry(dev)->msi_attrib.is_msix)
+ type = PCI_CAP_ID_MSIX;
+ else
+ type = PCI_CAP_ID_MSI;
+
+ return xen_msi_ops.setup_msi_irqs(to_pci_dev(dev), nvec, type);
}
-#endif
+static void xen_msi_domain_free_irqs(struct irq_domain *domain,
+ struct device *dev)
+{
+ if (WARN_ON_ONCE(!dev_is_pci(dev)))
+ return;
+
+ xen_msi_ops.teardown_msi_irqs(to_pci_dev(dev));
+}
+
+static struct msi_domain_ops xen_pci_msi_domain_ops = {
+ .domain_alloc_irqs = xen_msi_domain_alloc_irqs,
+ .domain_free_irqs = xen_msi_domain_free_irqs,
+};
+
+static struct msi_domain_info xen_pci_msi_domain_info = {
+ .ops = &xen_pci_msi_domain_ops,
+};
+
+/*
+ * This irq domain is a blatant violation of the irq domain design, but
+ * distangling XEN into real irq domains is not a job for mere mortals with
+ * limited XENology. But it's the least dangerous way for a mere mortal to
+ * get rid of the arch_*_msi_irqs() hackery in order to store the irq
+ * domain pointer in struct device. This irq domain wrappery allows to do
+ * that without breaking XEN terminally.
+ */
+static __init struct irq_domain *xen_create_pci_msi_domain(void)
+{
+ struct irq_domain *d = NULL;
+ struct fwnode_handle *fn;
+
+ fn = irq_domain_alloc_named_fwnode("XEN-MSI");
+ if (fn)
+ d = msi_create_irq_domain(fn, &xen_pci_msi_domain_info, NULL);
+
+ /* FIXME: No idea how to survive if this fails */
+ BUG_ON(!d);
+
+ return d;
+}
+
+static __init void xen_setup_pci_msi(void)
+{
+ if (xen_pv_domain()) {
+ if (xen_initial_domain()) {
+ xen_msi_ops.setup_msi_irqs = xen_initdom_setup_msi_irqs;
+ x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
+ } else {
+ xen_msi_ops.setup_msi_irqs = xen_setup_msi_irqs;
+ }
+ xen_msi_ops.teardown_msi_irqs = xen_pv_teardown_msi_irqs;
+ pci_msi_ignore_mask = 1;
+ } else if (xen_hvm_domain()) {
+ xen_msi_ops.setup_msi_irqs = xen_hvm_setup_msi_irqs;
+ xen_msi_ops.teardown_msi_irqs = xen_teardown_msi_irqs;
+ } else {
+ WARN_ON_ONCE(1);
+ return;
+ }
+
+ /*
+ * Override the PCI/MSI irq domain init function. No point
+ * in allocating the native domain and never use it.
+ */
+ x86_init.irqs.create_pci_msi_domain = xen_create_pci_msi_domain;
+}
+
+#else /* CONFIG_PCI_MSI */
+static inline void xen_setup_pci_msi(void) { }
+#endif /* CONFIG_PCI_MSI */
int __init pci_xen_init(void)
{
@@ -409,17 +511,12 @@ int __init pci_xen_init(void)
/* Keep ACPI out of the picture */
acpi_noirq_set();
-#ifdef CONFIG_PCI_MSI
- x86_msi.setup_msi_irqs = xen_setup_msi_irqs;
- x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
- x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs;
- pci_msi_ignore_mask = 1;
-#endif
+ xen_setup_pci_msi();
return 0;
}
#ifdef CONFIG_PCI_MSI
-void __init xen_msi_init(void)
+static void __init xen_hvm_msi_init(void)
{
if (!disable_apic) {
/*
@@ -434,9 +531,7 @@ void __init xen_msi_init(void)
((eax & XEN_HVM_CPUID_APIC_ACCESS_VIRT) && boot_cpu_has(X86_FEATURE_APIC)))
return;
}
-
- x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs;
- x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
+ xen_setup_pci_msi();
}
#endif
@@ -459,7 +554,7 @@ int __init pci_xen_hvm_init(void)
* We need to wait until after x2apic is initialized
* before we can set MSI IRQ ops.
*/
- x86_platform.apic_post_init = xen_msi_init;
+ x86_platform.apic_post_init = xen_hvm_msi_init;
#endif
return 0;
}
@@ -469,12 +564,7 @@ int __init pci_xen_initial_domain(void)
{
int irq;
-#ifdef CONFIG_PCI_MSI
- x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
- x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
- x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
- pci_msi_ignore_mask = 1;
-#endif
+ xen_setup_pci_msi();
__acpi_register_gsi = acpi_register_gsi_xen;
__acpi_unregister_gsi = NULL;
/*
generated by cgit (git 2.34.1) at 2024-06-22 12:54:59 +0000