}
}
+static void msix_flush_writes(unsigned int irq)
+{
+ struct msi_desc *entry;
+
+ entry = get_irq_msi(irq);
+ BUG_ON(!entry || !entry->dev);
+ switch (entry->msi_attrib.type) {
+ case PCI_CAP_ID_MSI:
+ /* nothing to do */
+ break;
+ case PCI_CAP_ID_MSIX:
+ {
+ int offset = entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
+ PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET;
+ readl(entry->mask_base + offset);
+ break;
+ }
+ default:
+ BUG();
+ break;
+ }
+}
+
static void msi_set_mask_bit(unsigned int irq, int flag)
{
struct msi_desc *entry;
int offset = entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET;
writel(flag, entry->mask_base + offset);
+ readl(entry->mask_base + offset);
break;
}
default:
BUG();
break;
}
+ entry->msi_attrib.masked = !!flag;
}
void read_msi_msg(unsigned int irq, struct msi_msg *msg)
default:
BUG();
}
+ entry->msg = *msg;
}
void mask_msi_irq(unsigned int irq)
{
msi_set_mask_bit(irq, 1);
+ msix_flush_writes(irq);
}
void unmask_msi_irq(unsigned int irq)
{
msi_set_mask_bit(irq, 0);
+ msix_flush_writes(irq);
}
static int msi_free_irq(struct pci_dev* dev, int irq);
}
#ifdef CONFIG_PM
-static int __pci_save_msi_state(struct pci_dev *dev)
-{
- int pos, i = 0;
- u16 control;
- struct pci_cap_saved_state *save_state;
- u32 *cap;
-
- if (!dev->msi_enabled)
- return 0;
-
- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (pos <= 0)
- return 0;
-
- save_state = kzalloc(sizeof(struct pci_cap_saved_state) + sizeof(u32) * 5,
- GFP_KERNEL);
- if (!save_state) {
- printk(KERN_ERR "Out of memory in pci_save_msi_state\n");
- return -ENOMEM;
- }
- cap = &save_state->data[0];
-
- pci_read_config_dword(dev, pos, &cap[i++]);
- control = cap[0] >> 16;
- pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_LO, &cap[i++]);
- if (control & PCI_MSI_FLAGS_64BIT) {
- pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_HI, &cap[i++]);
- pci_read_config_dword(dev, pos + PCI_MSI_DATA_64, &cap[i++]);
- } else
- pci_read_config_dword(dev, pos + PCI_MSI_DATA_32, &cap[i++]);
- if (control & PCI_MSI_FLAGS_MASKBIT)
- pci_read_config_dword(dev, pos + PCI_MSI_MASK_BIT, &cap[i++]);
- save_state->cap_nr = PCI_CAP_ID_MSI;
- pci_add_saved_cap(dev, save_state);
- return 0;
-}
-
static void __pci_restore_msi_state(struct pci_dev *dev)
{
- int i = 0, pos;
+ int pos;
u16 control;
- struct pci_cap_saved_state *save_state;
- u32 *cap;
+ struct msi_desc *entry;
if (!dev->msi_enabled)
return;
- save_state = pci_find_saved_cap(dev, PCI_CAP_ID_MSI);
- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (!save_state || pos <= 0)
- return;
- cap = &save_state->data[0];
+ entry = get_irq_msi(dev->irq);
+ pos = entry->msi_attrib.pos;
pci_intx(dev, 0); /* disable intx */
- control = cap[i++] >> 16;
msi_set_enable(dev, 0);
- pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_LO, cap[i++]);
- if (control & PCI_MSI_FLAGS_64BIT) {
- pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_HI, cap[i++]);
- pci_write_config_dword(dev, pos + PCI_MSI_DATA_64, cap[i++]);
- } else
- pci_write_config_dword(dev, pos + PCI_MSI_DATA_32, cap[i++]);
- if (control & PCI_MSI_FLAGS_MASKBIT)
- pci_write_config_dword(dev, pos + PCI_MSI_MASK_BIT, cap[i++]);
+ write_msi_msg(dev->irq, &entry->msg);
+ if (entry->msi_attrib.maskbit)
+ msi_set_mask_bit(dev->irq, entry->msi_attrib.masked);
+
+ pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
+ control &= ~(PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE);
+ if (entry->msi_attrib.maskbit || !entry->msi_attrib.masked)
+ control |= PCI_MSI_FLAGS_ENABLE;
pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
- pci_remove_saved_cap(save_state);
- kfree(save_state);
-}
-
-static int __pci_save_msix_state(struct pci_dev *dev)
-{
- int pos;
- int irq, head, tail = 0;
- u16 control;
- struct pci_cap_saved_state *save_state;
-
- if (!dev->msix_enabled)
- return 0;
-
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (pos <= 0)
- return 0;
-
- /* save the capability */
- pci_read_config_word(dev, msi_control_reg(pos), &control);
- save_state = kzalloc(sizeof(struct pci_cap_saved_state) + sizeof(u16),
- GFP_KERNEL);
- if (!save_state) {
- printk(KERN_ERR "Out of memory in pci_save_msix_state\n");
- return -ENOMEM;
- }
- *((u16 *)&save_state->data[0]) = control;
-
- /* save the table */
- irq = head = dev->first_msi_irq;
- while (head != tail) {
- struct msi_desc *entry;
-
- entry = get_irq_msi(irq);
- read_msi_msg(irq, &entry->msg_save);
-
- tail = entry->link.tail;
- irq = tail;
- }
-
- save_state->cap_nr = PCI_CAP_ID_MSIX;
- pci_add_saved_cap(dev, save_state);
- return 0;
-}
-
-int pci_save_msi_state(struct pci_dev *dev)
-{
- int rc;
-
- rc = __pci_save_msi_state(dev);
- if (rc)
- return rc;
-
- rc = __pci_save_msix_state(dev);
-
- return rc;
}
static void __pci_restore_msix_state(struct pci_dev *dev)
{
- u16 save;
int pos;
int irq, head, tail = 0;
struct msi_desc *entry;
- struct pci_cap_saved_state *save_state;
+ u16 control;
if (!dev->msix_enabled)
return;
- save_state = pci_find_saved_cap(dev, PCI_CAP_ID_MSIX);
- if (!save_state)
- return;
- save = *((u16 *)&save_state->data[0]);
- pci_remove_saved_cap(save_state);
- kfree(save_state);
-
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (pos <= 0)
- return;
-
/* route the table */
pci_intx(dev, 0); /* disable intx */
msix_set_enable(dev, 0);
irq = head = dev->first_msi_irq;
+ entry = get_irq_msi(irq);
+ pos = entry->msi_attrib.pos;
while (head != tail) {
entry = get_irq_msi(irq);
- write_msi_msg(irq, &entry->msg_save);
+ write_msi_msg(irq, &entry->msg);
+ msi_set_mask_bit(irq, entry->msi_attrib.masked);
tail = entry->link.tail;
irq = tail;
}
- pci_write_config_word(dev, msi_control_reg(pos), save);
+ pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
+ control &= ~PCI_MSIX_FLAGS_MASKALL;
+ control |= PCI_MSIX_FLAGS_ENABLE;
+ pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
}
void pci_restore_msi_state(struct pci_dev *dev)
entry->msi_attrib.is_64 = is_64bit_address(control);
entry->msi_attrib.entry_nr = 0;
entry->msi_attrib.maskbit = is_mask_bit_support(control);
+ entry->msi_attrib.masked = 1;
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.pos = pos;
if (is_mask_bit_support(control)) {
entry->msi_attrib.is_64 = 1;
entry->msi_attrib.entry_nr = j;
entry->msi_attrib.maskbit = 1;
+ entry->msi_attrib.masked = 1;
entry->msi_attrib.default_irq = dev->irq;
entry->msi_attrib.pos = pos;
entry->dev = dev;
if (!entry || !entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI) {
return;
}
- if (irq_has_action(dev->first_msi_irq)) {
- printk(KERN_WARNING "PCI: %s: pci_disable_msi() called without "
- "free_irq() on MSI irq %d\n",
- pci_name(dev), dev->first_msi_irq);
- BUG_ON(irq_has_action(dev->first_msi_irq));
- } else {
- default_irq = entry->msi_attrib.default_irq;
- msi_free_irq(dev, dev->first_msi_irq);
- /* Restore dev->irq to its default pin-assertion irq */
- dev->irq = default_irq;
- }
+ BUG_ON(irq_has_action(dev->first_msi_irq));
+
+ default_irq = entry->msi_attrib.default_irq;
+ msi_free_irq(dev, dev->first_msi_irq);
+
+ /* Restore dev->irq to its default pin-assertion irq */
+ dev->irq = default_irq;
+
dev->first_msi_irq = 0;
}
return status;
}
-void pci_disable_msix(struct pci_dev* dev)
+static void msix_free_all_irqs(struct pci_dev *dev)
{
- int irq, head, tail = 0, warning = 0;
+ int irq, head, tail = 0;
+
+ irq = head = dev->first_msi_irq;
+ while (head != tail) {
+ tail = get_irq_msi(irq)->link.tail;
+ BUG_ON(irq_has_action(irq));
+
+ if (irq != head)
+ msi_free_irq(dev, irq);
+ irq = tail;
+ }
+ msi_free_irq(dev, irq);
+ dev->first_msi_irq = 0;
+}
+
+void pci_disable_msix(struct pci_dev* dev)
+{
if (!pci_msi_enable)
return;
if (!dev)
pci_intx(dev, 1); /* enable intx */
dev->msix_enabled = 0;
- irq = head = dev->first_msi_irq;
- while (head != tail) {
- tail = get_irq_msi(irq)->link.tail;
- if (irq_has_action(irq))
- warning = 1;
- else if (irq != head) /* Release MSI-X irq */
- msi_free_irq(dev, irq);
- irq = tail;
- }
- msi_free_irq(dev, irq);
- if (warning) {
- printk(KERN_WARNING "PCI: %s: pci_disable_msix() called without "
- "free_irq() on all MSI-X irqs\n",
- pci_name(dev));
- BUG_ON(warning > 0);
- }
- dev->first_msi_irq = 0;
+ msix_free_all_irqs(dev);
}
/**
return;
if (dev->msi_enabled) {
- if (irq_has_action(dev->first_msi_irq)) {
- printk(KERN_WARNING "PCI: %s: msi_remove_pci_irq_vectors() "
- "called without free_irq() on MSI irq %d\n",
- pci_name(dev), dev->first_msi_irq);
- BUG_ON(irq_has_action(dev->first_msi_irq));
- } else /* Release MSI irq assigned to this device */
- msi_free_irq(dev, dev->first_msi_irq);
- }
- if (dev->msix_enabled) {
- int irq, head, tail = 0, warning = 0;
- void __iomem *base = NULL;
-
- irq = head = dev->first_msi_irq;
- while (head != tail) {
- tail = get_irq_msi(irq)->link.tail;
- base = get_irq_msi(irq)->mask_base;
- if (irq_has_action(irq))
- warning = 1;
- else if (irq != head) /* Release MSI-X irq */
- msi_free_irq(dev, irq);
- irq = tail;
- }
- msi_free_irq(dev, irq);
- if (warning) {
- iounmap(base);
- printk(KERN_WARNING "PCI: %s: msi_remove_pci_irq_vectors() "
- "called without free_irq() on all MSI-X irqs\n",
- pci_name(dev));
- BUG_ON(warning > 0);
- }
+ BUG_ON(irq_has_action(dev->first_msi_irq));
+ msi_free_irq(dev, dev->first_msi_irq);
}
+
+ if (dev->msix_enabled)
+ msix_free_all_irqs(dev);
}
void pci_no_msi(void)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff