#include "pci.h"
#include "msi.h"
-static DEFINE_SPINLOCK(msi_lock);
-static struct msi_desc* msi_desc[NR_IRQS] = { [0 ... NR_IRQS-1] = NULL };
-static kmem_cache_t* msi_cachep;
+static struct kmem_cache* msi_cachep;
static int pci_msi_enable = 1;
{
struct msi_desc *entry;
- entry = msi_desc[irq];
+ entry = get_irq_msi(irq);
BUG_ON(!entry || !entry->dev);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
if (entry->msi_attrib.maskbit) {
- int pos;
- u32 mask_bits;
+ int pos;
+ u32 mask_bits;
pos = (long)entry->mask_base;
pci_read_config_dword(entry->dev, pos, &mask_bits);
void read_msi_msg(unsigned int irq, struct msi_msg *msg)
{
- struct msi_desc *entry = get_irq_data(irq);
+ struct msi_desc *entry = get_irq_msi(irq);
switch(entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
void write_msi_msg(unsigned int irq, struct msi_msg *msg)
{
- struct msi_desc *entry = get_irq_data(irq);
+ struct msi_desc *entry = get_irq_msi(irq);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
}
static int msi_free_irq(struct pci_dev* dev, int irq);
+
static int msi_init(void)
{
static int status = -ENOMEM;
if (!status)
return status;
- if (pci_msi_quirk) {
- pci_msi_enable = 0;
- printk(KERN_WARNING "PCI: MSI quirk detected. MSI disabled.\n");
- status = -EINVAL;
- return status;
- }
-
status = msi_cache_init();
if (status < 0) {
pci_msi_enable = 0;
return entry;
}
-static void attach_msi_entry(struct msi_desc *entry, int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&msi_lock, flags);
- msi_desc[irq] = entry;
- spin_unlock_irqrestore(&msi_lock, flags);
-}
-
static int create_msi_irq(void)
{
struct msi_desc *entry;
return -EBUSY;
}
- set_irq_data(irq, entry);
+ set_irq_msi(irq, entry);
return irq;
}
{
struct msi_desc *entry;
- entry = get_irq_data(irq);
+ entry = get_irq_msi(irq);
set_irq_chip(irq, NULL);
- set_irq_data(irq, NULL);
+ set_irq_msi(irq, NULL);
destroy_irq(irq);
kmem_cache_free(msi_cachep, entry);
}
pci_write_config_word(dev, msi_control_reg(pos), control);
dev->msix_enabled = 1;
}
- if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
- /* PCI Express Endpoint device detected */
- pci_intx(dev, 0); /* disable intx */
- }
+
+ pci_intx(dev, 0); /* disable intx */
}
void disable_msi_mode(struct pci_dev *dev, int pos, int type)
pci_write_config_word(dev, msi_control_reg(pos), control);
dev->msix_enabled = 0;
}
- if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
- /* PCI Express Endpoint device detected */
- pci_intx(dev, 1); /* enable intx */
- }
-}
-
-static int msi_lookup_irq(struct pci_dev *dev, int type)
-{
- int irq;
- unsigned long flags;
-
- spin_lock_irqsave(&msi_lock, flags);
- for (irq = 0; irq < NR_IRQS; irq++) {
- if (!msi_desc[irq] || msi_desc[irq]->dev != dev ||
- msi_desc[irq]->msi_attrib.type != type ||
- msi_desc[irq]->msi_attrib.default_irq != dev->irq)
- continue;
- spin_unlock_irqrestore(&msi_lock, flags);
- /* This pre-assigned MSI irq for this device
- already exits. Override dev->irq with this irq */
- dev->irq = irq;
- return 0;
- }
- spin_unlock_irqrestore(&msi_lock, flags);
- return -EACCES;
-}
-
-void pci_scan_msi_device(struct pci_dev *dev)
-{
- if (!dev)
- return;
+ pci_intx(dev, 1); /* enable intx */
}
#ifdef CONFIG_PM
-int pci_save_msi_state(struct pci_dev *dev)
+static int __pci_save_msi_state(struct pci_dev *dev)
{
int pos, i = 0;
u16 control;
return 0;
}
-void pci_restore_msi_state(struct pci_dev *dev)
+static void __pci_restore_msi_state(struct pci_dev *dev)
{
int i = 0, pos;
u16 control;
kfree(save_state);
}
-int pci_save_msix_state(struct pci_dev *dev)
+static int __pci_save_msix_state(struct pci_dev *dev)
{
int pos;
- int temp;
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 || dev->no_msi)
return 0;
*((u16 *)&save_state->data[0]) = control;
/* save the table */
- temp = dev->irq;
- if (msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) {
- kfree(save_state);
- return -EINVAL;
- }
-
- irq = head = dev->irq;
+ irq = head = dev->first_msi_irq;
while (head != tail) {
struct msi_desc *entry;
- entry = msi_desc[irq];
+ entry = get_irq_msi(irq);
read_msi_msg(irq, &entry->msg_save);
- tail = msi_desc[irq]->link.tail;
+ tail = entry->link.tail;
irq = tail;
}
- dev->irq = temp;
save_state->cap_nr = PCI_CAP_ID_MSIX;
pci_add_saved_cap(dev, save_state);
return 0;
}
-void pci_restore_msix_state(struct pci_dev *dev)
+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;
- int temp;
struct pci_cap_saved_state *save_state;
+ if (!dev->msix_enabled)
+ return;
+
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_MSIX);
if (!save_state)
return;
return;
/* route the table */
- temp = dev->irq;
- if (msi_lookup_irq(dev, PCI_CAP_ID_MSIX))
- return;
- irq = head = dev->irq;
+ irq = head = dev->first_msi_irq;
while (head != tail) {
- entry = msi_desc[irq];
+ entry = get_irq_msi(irq);
write_msi_msg(irq, &entry->msg_save);
- tail = msi_desc[irq]->link.tail;
+ tail = entry->link.tail;
irq = tail;
}
- dev->irq = temp;
pci_write_config_word(dev, msi_control_reg(pos), save);
enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
}
-#endif
+
+void pci_restore_msi_state(struct pci_dev *dev)
+{
+ __pci_restore_msi_state(dev);
+ __pci_restore_msix_state(dev);
+}
+#endif /* CONFIG_PM */
/**
* msi_capability_init - configure device's MSI capability structure
if (irq < 0)
return irq;
- entry = get_irq_data(irq);
+ entry = get_irq_msi(irq);
entry->link.head = irq;
entry->link.tail = irq;
entry->msi_attrib.type = PCI_CAP_ID_MSI;
return status;
}
- attach_msi_entry(entry, irq);
+ dev->first_msi_irq = irq;
+ set_irq_msi(irq, entry);
/* Set MSI enabled bits */
enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
if (irq < 0)
break;
- entry = get_irq_data(irq);
+ entry = get_irq_msi(irq);
j = entries[i].entry;
entries[i].vector = irq;
entry->msi_attrib.type = PCI_CAP_ID_MSIX;
break;
}
- attach_msi_entry(entry, irq);
+ set_irq_msi(irq, entry);
}
if (i != nvec) {
int avail = i - 1;
avail = -EBUSY;
return avail;
}
+ dev->first_msi_irq = entries[0].vector;
/* Set MSI-X enabled bits */
enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
**/
int pci_enable_msi(struct pci_dev* dev)
{
- int pos, temp, status;
+ int pos, status;
if (pci_msi_supported(dev) < 0)
return -EINVAL;
- temp = dev->irq;
-
status = msi_init();
if (status < 0)
return status;
if (!pos)
return -EINVAL;
- WARN_ON(!msi_lookup_irq(dev, PCI_CAP_ID_MSI));
+ WARN_ON(!!dev->msi_enabled);
/* Check whether driver already requested for MSI-X irqs */
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) {
+ if (pos > 0 && dev->msix_enabled) {
printk(KERN_INFO "PCI: %s: Can't enable MSI. "
- "Device already has MSI-X irq assigned\n",
+ "Device already has MSI-X enabled\n",
pci_name(dev));
- dev->irq = temp;
return -EINVAL;
}
status = msi_capability_init(dev);
struct msi_desc *entry;
int pos, default_irq;
u16 control;
- unsigned long flags;
if (!pci_msi_enable)
return;
if (!dev)
return;
+ if (!dev->msi_enabled)
+ return;
+
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
if (!pos)
return;
if (!(control & PCI_MSI_FLAGS_ENABLE))
return;
+
disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
- spin_lock_irqsave(&msi_lock, flags);
- entry = msi_desc[dev->irq];
+ entry = get_irq_msi(dev->first_msi_irq);
if (!entry || !entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI) {
- spin_unlock_irqrestore(&msi_lock, flags);
return;
}
- if (irq_has_action(dev->irq)) {
- spin_unlock_irqrestore(&msi_lock, flags);
+ 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->irq);
- BUG_ON(irq_has_action(dev->irq));
+ pci_name(dev), dev->first_msi_irq);
+ BUG_ON(irq_has_action(dev->first_msi_irq));
} else {
default_irq = entry->msi_attrib.default_irq;
- spin_unlock_irqrestore(&msi_lock, flags);
- msi_free_irq(dev, dev->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;
}
static int msi_free_irq(struct pci_dev* dev, int irq)
struct msi_desc *entry;
int head, entry_nr, type;
void __iomem *base;
- unsigned long flags;
arch_teardown_msi_irq(irq);
- spin_lock_irqsave(&msi_lock, flags);
- entry = msi_desc[irq];
+ entry = get_irq_msi(irq);
if (!entry || entry->dev != dev) {
- spin_unlock_irqrestore(&msi_lock, flags);
return -EINVAL;
}
type = entry->msi_attrib.type;
entry_nr = entry->msi_attrib.entry_nr;
head = entry->link.head;
base = entry->mask_base;
- msi_desc[entry->link.head]->link.tail = entry->link.tail;
- msi_desc[entry->link.tail]->link.head = entry->link.head;
+ get_irq_msi(entry->link.head)->link.tail = entry->link.tail;
+ get_irq_msi(entry->link.tail)->link.head = entry->link.head;
entry->dev = NULL;
- msi_desc[irq] = NULL;
- spin_unlock_irqrestore(&msi_lock, flags);
destroy_msi_irq(irq);
int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
{
int status, pos, nr_entries;
- int i, j, temp;
+ int i, j;
u16 control;
if (!entries || pci_msi_supported(dev) < 0)
return -EINVAL; /* duplicate entry */
}
}
- temp = dev->irq;
- WARN_ON(!msi_lookup_irq(dev, PCI_CAP_ID_MSIX));
+ WARN_ON(!!dev->msix_enabled);
/* Check whether driver already requested for MSI irq */
if (pci_find_capability(dev, PCI_CAP_ID_MSI) > 0 &&
- !msi_lookup_irq(dev, PCI_CAP_ID_MSI)) {
+ dev->msi_enabled) {
printk(KERN_INFO "PCI: %s: Can't enable MSI-X. "
"Device already has an MSI irq assigned\n",
pci_name(dev));
- dev->irq = temp;
return -EINVAL;
}
status = msix_capability_init(dev, entries, nvec);
void pci_disable_msix(struct pci_dev* dev)
{
- int pos, temp;
+ int irq, head, tail = 0, warning = 0;
+ int pos;
u16 control;
if (!pci_msi_enable)
if (!dev)
return;
+ if (!dev->msix_enabled)
+ return;
+
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
if (!pos)
return;
disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
- temp = dev->irq;
- if (!msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) {
- int irq, head, tail = 0, warning = 0;
- unsigned long flags;
-
- irq = head = dev->irq;
- dev->irq = temp; /* Restore pin IRQ */
- while (head != tail) {
- spin_lock_irqsave(&msi_lock, flags);
- tail = msi_desc[irq]->link.tail;
- spin_unlock_irqrestore(&msi_lock, flags);
- 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);
- }
+ 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;
}
/**
**/
void msi_remove_pci_irq_vectors(struct pci_dev* dev)
{
- int pos, temp;
- unsigned long flags;
-
if (!pci_msi_enable || !dev)
return;
- temp = dev->irq; /* Save IOAPIC IRQ */
- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSI)) {
- if (irq_has_action(dev->irq)) {
+ 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->irq);
- BUG_ON(irq_has_action(dev->irq));
+ 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->irq);
- dev->irq = temp; /* Restore IOAPIC IRQ */
+ msi_free_irq(dev, dev->first_msi_irq);
}
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) {
+ if (dev->msix_enabled) {
int irq, head, tail = 0, warning = 0;
void __iomem *base = NULL;
- irq = head = dev->irq;
+ irq = head = dev->first_msi_irq;
while (head != tail) {
- spin_lock_irqsave(&msi_lock, flags);
- tail = msi_desc[irq]->link.tail;
- base = msi_desc[irq]->mask_base;
- spin_unlock_irqrestore(&msi_lock, flags);
+ 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 */
pci_name(dev));
BUG_ON(warning > 0);
}
- dev->irq = temp; /* Restore IOAPIC IRQ */
}
}
git.openpandora.org / pandora-kernel.git / blobdiff