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-rw-r--r--drivers/pci/controller/Kconfig3
-rw-r--r--drivers/pci/hotplug/s390_pci_hpc.c24
-rw-r--r--drivers/pci/msi.c39
-rw-r--r--drivers/pci/pci.c3
-rw-r--r--drivers/pci/quirks.c6
5 files changed, 56 insertions, 19 deletions
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index e917bb3652bb..93b141110537 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -270,7 +270,8 @@ config VMD
config PCIE_BRCMSTB
tristate "Broadcom Brcmstb PCIe host controller"
- depends on ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCM4908 || COMPILE_TEST
+ depends on ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCM4908 || \
+ BMIPS_GENERIC || COMPILE_TEST
depends on OF
depends on PCI_MSI_IRQ_DOMAIN
default ARCH_BRCMSTB
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index dcefdb42ac46..a89b7de72dcf 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -57,6 +57,29 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
return zpci_deconfigure_device(zdev);
}
+static int reset_slot(struct hotplug_slot *hotplug_slot, bool probe)
+{
+ struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
+ hotplug_slot);
+
+ if (zdev->state != ZPCI_FN_STATE_CONFIGURED)
+ return -EIO;
+ /*
+ * We can't take the zdev->lock as reset_slot may be called during
+ * probing and/or device removal which already happens under the
+ * zdev->lock. Instead the user should use the higher level
+ * pci_reset_function() or pci_bus_reset() which hold the PCI device
+ * lock preventing concurrent removal. If not using these functions
+ * holding the PCI device lock is required.
+ */
+
+ /* As long as the function is configured we can reset */
+ if (probe)
+ return 0;
+
+ return zpci_hot_reset_device(zdev);
+}
+
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
@@ -76,6 +99,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
static const struct hotplug_slot_ops s390_hotplug_slot_ops = {
.enable_slot = enable_slot,
.disable_slot = disable_slot,
+ .reset_slot = reset_slot,
.get_power_status = get_power_status,
.get_adapter_status = get_adapter_status,
};
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 12e296d634eb..48e3f4e47b29 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -148,6 +148,9 @@ static noinline void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 s
raw_spinlock_t *lock = &desc->dev->msi_lock;
unsigned long flags;
+ if (!desc->msi_attrib.can_mask)
+ return;
+
raw_spin_lock_irqsave(lock, flags);
desc->msi_mask &= ~clear;
desc->msi_mask |= set;
@@ -181,7 +184,8 @@ static void pci_msix_write_vector_ctrl(struct msi_desc *desc, u32 ctrl)
{
void __iomem *desc_addr = pci_msix_desc_addr(desc);
- writel(ctrl, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
+ if (desc->msi_attrib.can_mask)
+ writel(ctrl, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
}
static inline void pci_msix_mask(struct msi_desc *desc)
@@ -200,23 +204,17 @@ static inline void pci_msix_unmask(struct msi_desc *desc)
static void __pci_msi_mask_desc(struct msi_desc *desc, u32 mask)
{
- if (pci_msi_ignore_mask || desc->msi_attrib.is_virtual)
- return;
-
if (desc->msi_attrib.is_msix)
pci_msix_mask(desc);
- else if (desc->msi_attrib.maskbit)
+ else
pci_msi_mask(desc, mask);
}
static void __pci_msi_unmask_desc(struct msi_desc *desc, u32 mask)
{
- if (pci_msi_ignore_mask || desc->msi_attrib.is_virtual)
- return;
-
if (desc->msi_attrib.is_msix)
pci_msix_unmask(desc);
- else if (desc->msi_attrib.maskbit)
+ else
pci_msi_unmask(desc, mask);
}
@@ -370,6 +368,11 @@ static void free_msi_irqs(struct pci_dev *dev)
for (i = 0; i < entry->nvec_used; i++)
BUG_ON(irq_has_action(entry->irq + i));
+ if (dev->msi_irq_groups) {
+ msi_destroy_sysfs(&dev->dev, dev->msi_irq_groups);
+ dev->msi_irq_groups = NULL;
+ }
+
pci_msi_teardown_msi_irqs(dev);
list_for_each_entry_safe(entry, tmp, msi_list, list) {
@@ -381,11 +384,6 @@ static void free_msi_irqs(struct pci_dev *dev)
list_del(&entry->list);
free_msi_entry(entry);
}
-
- if (dev->msi_irq_groups) {
- msi_destroy_sysfs(&dev->dev, dev->msi_irq_groups);
- dev->msi_irq_groups = NULL;
- }
}
static void pci_intx_for_msi(struct pci_dev *dev, int enable)
@@ -479,12 +477,16 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
goto out;
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
+ /* Lies, damned lies, and MSIs */
+ if (dev->dev_flags & PCI_DEV_FLAGS_HAS_MSI_MASKING)
+ control |= PCI_MSI_FLAGS_MASKBIT;
entry->msi_attrib.is_msix = 0;
entry->msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT);
entry->msi_attrib.is_virtual = 0;
entry->msi_attrib.entry_nr = 0;
- entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
+ entry->msi_attrib.can_mask = !pci_msi_ignore_mask &&
+ !!(control & PCI_MSI_FLAGS_MASKBIT);
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
@@ -495,7 +497,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_32;
/* Save the initial mask status */
- if (entry->msi_attrib.maskbit)
+ if (entry->msi_attrib.can_mask)
pci_read_config_dword(dev, entry->mask_pos, &entry->msi_mask);
out:
@@ -639,10 +641,13 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
entry->msi_attrib.is_virtual =
entry->msi_attrib.entry_nr >= vec_count;
+ entry->msi_attrib.can_mask = !pci_msi_ignore_mask &&
+ !entry->msi_attrib.is_virtual;
+
entry->msi_attrib.default_irq = dev->irq;
entry->mask_base = base;
- if (!entry->msi_attrib.is_virtual) {
+ if (entry->msi_attrib.can_mask) {
addr = pci_msix_desc_addr(entry);
entry->msix_ctrl = readl(addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
}
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1579a3724eb4..3d2fb394986a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5106,12 +5106,13 @@ static int pci_reset_bus_function(struct pci_dev *dev, bool probe)
return pci_parent_bus_reset(dev, probe);
}
-static void pci_dev_lock(struct pci_dev *dev)
+void pci_dev_lock(struct pci_dev *dev)
{
pci_cfg_access_lock(dev);
/* block PM suspend, driver probe, etc. */
device_lock(&dev->dev);
}
+EXPORT_SYMBOL_GPL(pci_dev_lock);
/* Return 1 on successful lock, 0 on contention */
int pci_dev_trylock(struct pci_dev *dev)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index aedb78c86ddc..003950c738d2 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5851,3 +5851,9 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303,
pci_fixup_pericom_acs_store_forward);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
pci_fixup_pericom_acs_store_forward);
+
+static void nvidia_ion_ahci_fixup(struct pci_dev *pdev)
+{
+ pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);
generated by cgit (git 2.34.1) at 2024-05-23 18:13:36 +0000