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x86, MSI: pass irq_cfg and irq_desc

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Impact: simplify code

Pass irq_desc and cfg around, instead of raw IRQ numbers - this way
we dont have to look it up again and again.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2008-12-05 18:58:34 -08:00
committed by Ingo Molnar
parent be5d5350a9
commit 3145e941fc
3 changed files with 226 additions and 158 deletions
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55
drivers/pci/msi.c
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@@ -103,11 +103,11 @@ static void msix_set_enable(struct pci_dev *dev, int enable)
}
}
static void msix_flush_writes(unsigned int irq)
static void msix_flush_writes(struct irq_desc *desc)
{
struct msi_desc *entry;
entry = get_irq_msi(irq);
entry = get_irq_desc_msi(desc);
BUG_ON(!entry || !entry->dev);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
@@ -135,11 +135,11 @@ static void msix_flush_writes(unsigned int irq)
* Returns 1 if it succeeded in masking the interrupt and 0 if the device
* doesn't support MSI masking.
*/
static int msi_set_mask_bits(unsigned int irq, u32 mask, u32 flag)
static int msi_set_mask_bits(struct irq_desc *desc, u32 mask, u32 flag)
{
struct msi_desc *entry;
entry = get_irq_msi(irq);
entry = get_irq_desc_msi(desc);
BUG_ON(!entry || !entry->dev);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
@@ -172,9 +172,9 @@ static int msi_set_mask_bits(unsigned int irq, u32 mask, u32 flag)
return 1;
}
void read_msi_msg(unsigned int irq, struct msi_msg *msg)
void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_msi(irq);
struct msi_desc *entry = get_irq_desc_msi(desc);
switch(entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
@@ -211,9 +211,16 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg)
}
}
void write_msi_msg(unsigned int irq, struct msi_msg *msg)
void read_msi_msg(unsigned int irq, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_msi(irq);
struct irq_desc *desc = irq_to_desc(irq);
read_msi_msg_desc(desc, msg);
}
void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
@@ -252,21 +259,31 @@ void write_msi_msg(unsigned int irq, struct msi_msg *msg)
entry->msg = *msg;
}
void write_msi_msg(unsigned int irq, struct msi_msg *msg)
{
struct irq_desc *desc = irq_to_desc(irq);
write_msi_msg_desc(desc, msg);
}
void mask_msi_irq(unsigned int irq)
{
msi_set_mask_bits(irq, 1, 1);
msix_flush_writes(irq);
struct irq_desc *desc = irq_to_desc(irq);
msi_set_mask_bits(desc, 1, 1);
msix_flush_writes(desc);
}
void unmask_msi_irq(unsigned int irq)
{
msi_set_mask_bits(irq, 1, 0);
msix_flush_writes(irq);
struct irq_desc *desc = irq_to_desc(irq);
msi_set_mask_bits(desc, 1, 0);
msix_flush_writes(desc);
}
static int msi_free_irqs(struct pci_dev* dev);
static struct msi_desc* alloc_msi_entry(void)
{
struct msi_desc *entry;
@@ -303,9 +320,11 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 0);
write_msi_msg(dev->irq, &entry->msg);
if (entry->msi_attrib.maskbit)
msi_set_mask_bits(dev->irq, entry->msi_attrib.maskbits_mask,
if (entry->msi_attrib.maskbit) {
struct irq_desc *desc = irq_to_desc(dev->irq);
msi_set_mask_bits(desc, entry->msi_attrib.maskbits_mask,
entry->msi_attrib.masked);
}
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
control &= ~PCI_MSI_FLAGS_QSIZE;
@@ -327,8 +346,9 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
msix_set_enable(dev, 0);
list_for_each_entry(entry, &dev->msi_list, list) {
struct irq_desc *desc = irq_to_desc(entry->irq);
write_msi_msg(entry->irq, &entry->msg);
msi_set_mask_bits(entry->irq, 1, entry->msi_attrib.masked);
msi_set_mask_bits(desc, 1, entry->msi_attrib.masked);
}
BUG_ON(list_empty(&dev->msi_list));
@@ -596,7 +616,8 @@ void pci_msi_shutdown(struct pci_dev* dev)
/* Return the the pci reset with msi irqs unmasked */
if (entry->msi_attrib.maskbit) {
u32 mask = entry->msi_attrib.maskbits_mask;
msi_set_mask_bits(dev->irq, mask, ~mask);
struct irq_desc *desc = irq_to_desc(dev->irq);
msi_set_mask_bits(desc, mask, ~mask);
}
if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI)
return;