#include <linux/proc_fs.h>
#include <linux/msi.h>
#include <linux/smp.h>
-
-#include <asm/errno.h>
-#include <asm/io.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/slab.h>
#include "pci.h"
#include "msi.h"
u16 control;
unsigned mask;
- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
msi_set_enable(dev, pos, 0); /* Disable MSI during set up */
pci_read_config_word(dev, msi_control_reg(pos), &control);
if (!entry)
return -ENOMEM;
- entry->msi_attrib.is_msix = 0;
- 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.default_irq = dev->irq; /* Save IOAPIC IRQ */
- entry->msi_attrib.pos = pos;
+ entry->msi_attrib.is_msix = 0;
+ 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.default_irq = dev->irq; /* Save IOAPIC IRQ */
+ entry->msi_attrib.pos = pos;
entry->mask_pos = msi_mask_reg(pos, entry->msi_attrib.is_64);
/* All MSIs are unmasked by default, Mask them all */
return ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
}
+static int msix_setup_entries(struct pci_dev *dev, unsigned pos,
+ void __iomem *base, struct msix_entry *entries,
+ int nvec)
+{
+ struct msi_desc *entry;
+ int i;
+
+ for (i = 0; i < nvec; i++) {
+ entry = alloc_msi_entry(dev);
+ if (!entry) {
+ if (!i)
+ iounmap(base);
+ else
+ free_msi_irqs(dev);
+ /* No enough memory. Don't try again */
+ return -ENOMEM;
+ }
+
+ entry->msi_attrib.is_msix = 1;
+ entry->msi_attrib.is_64 = 1;
+ entry->msi_attrib.entry_nr = entries[i].entry;
+ entry->msi_attrib.default_irq = dev->irq;
+ entry->msi_attrib.pos = pos;
+ entry->mask_base = base;
+
+ list_add_tail(&entry->list, &dev->msi_list);
+ }
+
+ return 0;
+}
+
+static void msix_program_entries(struct pci_dev *dev,
+ struct msix_entry *entries)
+{
+ struct msi_desc *entry;
+ int i = 0;
+
+ list_for_each_entry(entry, &dev->msi_list, list) {
+ int offset = entries[i].entry * PCI_MSIX_ENTRY_SIZE +
+ PCI_MSIX_ENTRY_VECTOR_CTRL;
+
+ entries[i].vector = entry->irq;
+ set_irq_msi(entry->irq, entry);
+ entry->masked = readl(entry->mask_base + offset);
+ msix_mask_irq(entry, 1);
+ i++;
+ }
+}
+
/**
* msix_capability_init - configure device's MSI-X capability
* @dev: pointer to the pci_dev data structure of MSI-X device function
static int msix_capability_init(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
- struct msi_desc *entry;
- int pos, i, j, ret;
+ int pos, ret;
u16 control;
void __iomem *base;
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
/* Ensure MSI-X is disabled while it is set up */
if (!base)
return -ENOMEM;
- for (i = 0; i < nvec; i++) {
- entry = alloc_msi_entry(dev);
- if (!entry) {
- if (!i)
- iounmap(base);
- else
- free_msi_irqs(dev);
- /* No enough memory. Don't try again */
- return -ENOMEM;
- }
-
- j = entries[i].entry;
- entry->msi_attrib.is_msix = 1;
- entry->msi_attrib.is_64 = 1;
- entry->msi_attrib.entry_nr = j;
- entry->msi_attrib.default_irq = dev->irq;
- entry->msi_attrib.pos = pos;
- entry->mask_base = base;
-
- list_add_tail(&entry->list, &dev->msi_list);
- }
+ ret = msix_setup_entries(dev, pos, base, entries, nvec);
+ if (ret)
+ return ret;
ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
if (ret)
control |= PCI_MSIX_FLAGS_MASKALL | PCI_MSIX_FLAGS_ENABLE;
pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
- i = 0;
- list_for_each_entry(entry, &dev->msi_list, list) {
- entries[i].vector = entry->irq;
- set_irq_msi(entry->irq, entry);
- j = entries[i].entry;
- entry->masked = readl(base + j * PCI_MSIX_ENTRY_SIZE +
- PCI_MSIX_ENTRY_VECTOR_CTRL);
- msix_mask_irq(entry, 1);
- i++;
- }
+ msix_program_entries(dev, entries);
/* Set MSI-X enabled bits and unmask the function */
pci_intx_for_msi(dev, 0);
* If we had some success, report the number of irqs
* we succeeded in setting up.
*/
+ struct msi_desc *entry;
int avail = 0;
list_for_each_entry(entry, &dev->msi_list, list) {
* to determine if MSI/-X are supported for the device. If MSI/-X is
* supported return 0, else return an error code.
**/
-static int pci_msi_check_device(struct pci_dev* dev, int nvec, int type)
+static int pci_msi_check_device(struct pci_dev *dev, int nvec, int type)
{
struct pci_bus *bus;
int ret;
if (nvec < 1)
return -ERANGE;
- /* Any bridge which does NOT route MSI transactions from it's
- * secondary bus to it's primary bus must set NO_MSI flag on
+ /*
+ * Any bridge which does NOT route MSI transactions from its
+ * secondary bus to its primary bus must set NO_MSI flag on
* the secondary pci_bus.
* We expect only arch-specific PCI host bus controller driver
* or quirks for specific PCI bridges to be setting NO_MSI.
dev->irq = desc->msi_attrib.default_irq;
}
-void pci_disable_msi(struct pci_dev* dev)
+void pci_disable_msi(struct pci_dev *dev)
{
if (!pci_msi_enable || !dev || !dev->msi_enabled)
return;
* of irqs or MSI-X vectors available. Driver should use the returned value to
* re-send its request.
**/
-int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
+int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
{
int status, nr_entries;
int i, j;
if (!entries)
- return -EINVAL;
+ return -EINVAL;
status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSIX);
if (status)
WARN_ON(!!dev->msix_enabled);
/* Check whether driver already requested for MSI irq */
- if (dev->msi_enabled) {
+ if (dev->msi_enabled) {
dev_info(&dev->dev, "can't enable MSI-X "
"(MSI IRQ already assigned)\n");
return -EINVAL;
}
EXPORT_SYMBOL(pci_enable_msix);
-void pci_msix_shutdown(struct pci_dev* dev)
+void pci_msix_shutdown(struct pci_dev *dev)
{
struct msi_desc *entry;
dev->msix_enabled = 0;
}
-void pci_disable_msix(struct pci_dev* dev)
+void pci_disable_msix(struct pci_dev *dev)
{
if (!pci_msi_enable || !dev || !dev->msix_enabled)
return;
* allocated for this device function, are reclaimed to unused state,
* which may be used later on.
**/
-void msi_remove_pci_irq_vectors(struct pci_dev* dev)
+void msi_remove_pci_irq_vectors(struct pci_dev *dev)
{
if (!pci_msi_enable || !dev)
- return;
+ return;
if (dev->msi_enabled || dev->msix_enabled)
free_msi_irqs(dev);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff