[PATCH v3 27/27] PCI/MSI: Clean up unused MSI arch functions
Yijing Wang
wangyijing at huawei.com
Wed Oct 15 14:07:15 AEDT 2014
Now we use struct msi_chip in all platforms to configure
MSI/MSI-X. We can clean up the unused arch functions.
Signed-off-by: Yijing Wang <wangyijing at huawei.com>
---
Hi Lucas,
I dropped the reviewed-by, because this version has a lot changes
compared to last one, I guess you may want to check it again.
---
drivers/iommu/irq_remapping.c | 2 +-
drivers/pci/msi.c | 103 +++++++++++++++--------------------------
include/linux/msi.h | 14 ------
include/linux/pci.h | 8 ---
4 files changed, 39 insertions(+), 88 deletions(-)
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 48d57e9..77160a5 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -92,7 +92,7 @@ error:
/*
* Restore altered MSI descriptor fields and prevent just destroyed
- * IRQs from tearing down again in default_teardown_msi_irqs()
+ * IRQs from tearing down again in teardown_msi_irqs()
*/
msidesc->irq = 0;
msidesc->nvec_used = 0;
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 5cbd774..b9fefe9 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -28,54 +28,31 @@ int pci_msi_ignore_mask;
#define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1)
-/* Arch hooks */
-
-int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
-{
- struct msi_chip *chip;
- int err;
-
- chip = pci_msi_chip(dev->bus);
- if (!chip || !chip->setup_irq)
- return -EINVAL;
-
- err = chip->setup_irq(chip, dev, desc);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-void __weak arch_teardown_msi_irq(unsigned int irq)
-{
- struct msi_desc *entry = irq_get_msi_desc(irq);
- struct msi_chip *chip = pci_msi_chip(entry->dev->bus);
-
- if (!chip || !chip->teardown_irq)
- return;
-
- chip->teardown_irq(chip, irq);
-}
-
-int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+int setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
struct msi_desc *entry;
int ret;
struct msi_chip *chip;
chip = pci_msi_chip(dev->bus);
- if (chip && chip->setup_irqs)
+ if (!chip)
+ return -EINVAL;
+
+ if (chip->setup_irqs)
return chip->setup_irqs(chip, dev, nvec, type);
/*
* If an architecture wants to support multiple MSI, it needs to
- * override arch_setup_msi_irqs()
+ * implement chip->setup_irqs().
*/
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
+ if (!chip->setup_irq)
+ return -EINVAL;
+
list_for_each_entry(entry, &dev->msi_list, list) {
- ret = arch_setup_msi_irq(dev, entry);
+ ret = chip->setup_irq(chip, dev, entry);
if (ret < 0)
return ret;
if (ret > 0)
@@ -85,13 +62,20 @@ int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
return 0;
}
-/*
- * We have a default implementation available as a separate non-weak
- * function, as it is used by the Xen x86 PCI code
- */
-void default_teardown_msi_irqs(struct pci_dev *dev)
+static void teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *entry;
+ struct msi_chip *chip;
+
+ chip = pci_msi_chip(dev->bus);
+ if (!chip)
+ return;
+
+ if (chip->teardown_irqs)
+ return chip->teardown_irqs(chip, dev);
+
+ if (!chip->teardown_irq)
+ return;
list_for_each_entry(entry, &dev->msi_list, list) {
int i, nvec;
@@ -102,20 +86,10 @@ void default_teardown_msi_irqs(struct pci_dev *dev)
else
nvec = 1 << entry->msi_attrib.multiple;
for (i = 0; i < nvec; i++)
- arch_teardown_msi_irq(entry->irq + i);
+ chip->teardown_irq(chip, entry->irq + i);
}
}
-void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
-{
- struct msi_chip *chip = pci_msi_chip(dev->bus);
-
- if (chip && chip->teardown_irqs)
- return chip->teardown_irqs(chip, dev);
-
- return default_teardown_msi_irqs(dev);
-}
-
static void default_restore_msi_irq(struct pci_dev *dev, int irq)
{
struct msi_desc *entry;
@@ -134,10 +108,18 @@ static void default_restore_msi_irq(struct pci_dev *dev, int irq)
__write_msi_msg(entry, &entry->msg);
}
-void __weak arch_restore_msi_irqs(struct pci_dev *dev)
+static void default_restore_msi_irqs(struct pci_dev *dev)
{
- struct msi_chip *chip = pci_msi_chip(dev->bus);
+ struct msi_desc *entry = NULL;
+
+ list_for_each_entry(entry, &dev->msi_list, list) {
+ default_restore_msi_irq(dev, entry->irq);
+ }
+}
+static void restore_msi_irqs(struct pci_dev *dev)
+{
+ struct msi_chip *chip = pci_msi_chip(dev->bus);
if (chip && chip->restore_irqs)
return chip->restore_irqs(chip, dev);
@@ -250,15 +232,6 @@ void unmask_msi_irq(struct irq_data *data)
msi_set_mask_bit(data, 0);
}
-void default_restore_msi_irqs(struct pci_dev *dev)
-{
- struct msi_desc *entry;
-
- list_for_each_entry(entry, &dev->msi_list, list) {
- default_restore_msi_irq(dev, entry->irq);
- }
-}
-
void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
BUG_ON(entry->dev->current_state != PCI_D0);
@@ -376,7 +349,7 @@ static void free_msi_irqs(struct pci_dev *dev)
BUG_ON(irq_has_action(entry->irq + i));
}
- arch_teardown_msi_irqs(dev);
+ teardown_msi_irqs(dev);
list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
if (entry->msi_attrib.is_msix) {
@@ -435,7 +408,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 0);
- arch_restore_msi_irqs(dev);
+ restore_msi_irqs(dev);
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
msi_mask_irq(entry, msi_mask(entry->msi_attrib.multi_cap),
@@ -458,7 +431,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
msix_clear_and_set_ctrl(dev, 0,
PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
- arch_restore_msi_irqs(dev);
+ restore_msi_irqs(dev);
list_for_each_entry(entry, &dev->msi_list, list) {
msix_mask_irq(entry, entry->masked);
}
@@ -628,7 +601,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
list_add_tail(&entry->list, &dev->msi_list);
/* Configure MSI capability structure */
- ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
+ ret = setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
if (ret) {
msi_mask_irq(entry, mask, ~mask);
free_msi_irqs(dev);
@@ -743,7 +716,7 @@ static int msix_capability_init(struct pci_dev *dev,
if (ret)
return ret;
- ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
+ ret = setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
if (ret)
goto out_avail;
diff --git a/include/linux/msi.h b/include/linux/msi.h
index eb5ae36..65b0927 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -52,20 +52,6 @@ struct msi_desc {
struct msi_msg msg;
};
-/*
- * The arch hooks to setup up msi irqs. Those functions are
- * implemented as weak symbols so that they /can/ be overriden by
- * architecture specific code if needed.
- */
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
-void arch_teardown_msi_irq(unsigned int irq);
-int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
-void arch_teardown_msi_irqs(struct pci_dev *dev);
-void arch_restore_msi_irqs(struct pci_dev *dev);
-
-void default_teardown_msi_irqs(struct pci_dev *dev);
-void default_restore_msi_irqs(struct pci_dev *dev);
-
struct msi_chip {
struct module *owner;
struct device *dev;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7a48b40..b28cc03 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1433,14 +1433,6 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
#include <asm/pci.h>
-/* Just avoid compile error, will be clean up later */
-#ifdef CONFIG_PCI_MSI
-
-#ifndef pci_msi_chip
-#define pci_msi_chip(bus) NULL
-#endif
-
-#endif
/* these helpers provide future and backwards compatibility
* for accessing popular PCI BAR info */
--
1.7.1
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