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-rw-r--r--drivers/pci/iov.c2
-rw-r--r--drivers/pci/probe.c22
-rw-r--r--drivers/pci/quirks.c22
-rw-r--r--drivers/xen/xen-pciback/pci_stub.c4
-rw-r--r--include/linux/pci.h17
-rw-r--r--include/uapi/linux/pci_regs.h1
-rw-r--r--virt/kvm/assigned-dev.c2
-rw-r--r--virt/kvm/iommu.c4
8 files changed, 64 insertions, 10 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index cb6f24740ee3..4d109c07294a 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -633,7 +633,7 @@ int pci_vfs_assigned(struct pci_dev *dev)
* our dev as the physical function and the assigned bit is set
*/
if (vfdev->is_virtfn && (vfdev->physfn == dev) &&
- (vfdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED))
+ pci_is_dev_assigned(vfdev))
vfs_assigned++;
vfdev = pci_get_device(dev->vendor, dev_id, vfdev);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e3cf8a2e6292..e02cdaa5bf0c 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -740,6 +740,17 @@ struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
}
EXPORT_SYMBOL(pci_add_new_bus);
+static void pci_enable_crs(struct pci_dev *pdev)
+{
+ u16 root_cap = 0;
+
+ /* Enable CRS Software Visibility if supported */
+ pcie_capability_read_word(pdev, PCI_EXP_RTCAP, &root_cap);
+ if (root_cap & PCI_EXP_RTCAP_CRSVIS)
+ pcie_capability_set_word(pdev, PCI_EXP_RTCTL,
+ PCI_EXP_RTCTL_CRSSVE);
+}
+
/*
* If it's a bridge, configure it and scan the bus behind it.
* For CardBus bridges, we don't scan behind as the devices will
@@ -787,6 +798,8 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
pci_write_config_word(dev, PCI_BRIDGE_CONTROL,
bctl & ~PCI_BRIDGE_CTL_MASTER_ABORT);
+ pci_enable_crs(dev);
+
if ((secondary || subordinate) && !pcibios_assign_all_busses() &&
!is_cardbus && !broken) {
unsigned int cmax;
@@ -1292,8 +1305,13 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
*l == 0x0000ffff || *l == 0xffff0000)
return false;
- /* Configuration request Retry Status */
- while (*l == 0xffff0001) {
+ /*
+ * Configuration Request Retry Status. Some root ports return the
+ * actual device ID instead of the synthetic ID (0xFFFF) required
+ * by the PCIe spec. Ignore the device ID and only check for
+ * (vendor id == 1).
+ */
+ while ((*l & 0xffff) == 0x0001) {
if (!crs_timeout)
return false;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 80c2d014283d..592178981f4e 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/ktime.h>
+#include <linux/mm.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include "pci.h"
@@ -287,6 +288,25 @@ static void quirk_citrine(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, quirk_citrine);
+/* On IBM Crocodile ipr SAS adapters, expand BAR to system page size */
+static void quirk_extend_bar_to_page(struct pci_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
+ struct resource *r = &dev->resource[i];
+
+ if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {
+ r->end = PAGE_SIZE - 1;
+ r->start = 0;
+ r->flags |= IORESOURCE_UNSET;
+ dev_info(&dev->dev, "expanded BAR %d to page size: %pR\n",
+ i, r);
+ }
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, 0x034a, quirk_extend_bar_to_page);
+
/*
* S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
* If it's needed, re-allocate the region.
@@ -2985,6 +3005,8 @@ DECLARE_PCI_FIXUP_HEADER(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */
*/
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_REALTEK, 0x8169,
quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, PCI_ANY_ID,
+ quirk_broken_intx_masking);
#ifdef CONFIG_ACPI
/*
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index 259ba2661543..017069a455d4 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -133,7 +133,7 @@ static void pcistub_device_release(struct kref *kref)
xen_pcibk_config_free_dyn_fields(dev);
xen_pcibk_config_free_dev(dev);
- dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+ pci_clear_dev_assigned(dev);
pci_dev_put(dev);
kfree(psdev);
@@ -413,7 +413,7 @@ static int pcistub_init_device(struct pci_dev *dev)
dev_dbg(&dev->dev, "reset device\n");
xen_pcibk_reset_device(dev);
- dev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
+ pci_set_dev_assigned(dev);
return 0;
config_release:
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 61978a460841..d868c08eea63 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -45,7 +45,7 @@
* In the interest of not exposing interfaces to user-space unnecessarily,
* the following kernel-only defines are being added here.
*/
-#define PCI_DEVID(bus, devfn) ((((u16)bus) << 8) | devfn)
+#define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
/* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
#define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
@@ -1701,7 +1701,7 @@ bool pci_acs_path_enabled(struct pci_dev *start,
struct pci_dev *end, u16 acs_flags);
#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
-#define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
+#define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
/* Large Resource Data Type Tag Item Names */
#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
@@ -1839,4 +1839,17 @@ int pci_for_each_dma_alias(struct pci_dev *pdev,
*/
struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
+/* helper functions for operation of device flag */
+static inline void pci_set_dev_assigned(struct pci_dev *pdev)
+{
+ pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
+}
+static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
+{
+ pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+}
+static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
+{
+ return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
+}
#endif /* LINUX_PCI_H */
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 30db069bce62..57d6e56a086a 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -552,6 +552,7 @@
#define PCI_EXP_RTCTL_PMEIE 0x0008 /* PME Interrupt Enable */
#define PCI_EXP_RTCTL_CRSSVE 0x0010 /* CRS Software Visibility Enable */
#define PCI_EXP_RTCAP 30 /* Root Capabilities */
+#define PCI_EXP_RTCAP_CRSVIS 0x0001 /* CRS Software Visibility capability */
#define PCI_EXP_RTSTA 32 /* Root Status */
#define PCI_EXP_RTSTA_PME 0x00010000 /* PME status */
#define PCI_EXP_RTSTA_PENDING 0x00020000 /* PME pending */
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 5819a2708d7e..e05000e200d2 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -302,7 +302,7 @@ static void kvm_free_assigned_device(struct kvm *kvm,
else
pci_restore_state(assigned_dev->dev);
- assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+ pci_clear_dev_assigned(assigned_dev->dev);
pci_release_regions(assigned_dev->dev);
pci_disable_device(assigned_dev->dev);
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 714b94932312..e723bb91aa34 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -203,7 +203,7 @@ int kvm_assign_device(struct kvm *kvm,
goto out_unmap;
}
- pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
+ pci_set_dev_assigned(pdev);
dev_info(&pdev->dev, "kvm assign device\n");
@@ -229,7 +229,7 @@ int kvm_deassign_device(struct kvm *kvm,
iommu_detach_device(domain, &pdev->dev);
- pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+ pci_clear_dev_assigned(pdev);
dev_info(&pdev->dev, "kvm deassign device\n");
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-17 22:49:28 +0000