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MSI: Combine pci_(save|restore)_msi/msix_state

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The PCI save/restore code doesn't need to care about MSI vs MSI-X, all
it really wants is to say "save/restore all MSI(-X) info for this device".

This is borne out in the code, we call the MSI and MSI-X save routines
side by side, and similarly with the restore routines.

So combine the MSI/MSI-X routines into pci_save_msi_state() and
pci_restore_msi_state(). It is up to those routines to decide what state
needs to be saved.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Ellerman 2007-01-25 19:34:08 +11:00 committed by Greg Kroah-Hartman
parent 0fcfdabbdb
commit 8fed4b6523
3 changed files with 26 additions and 11 deletions
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27
drivers/pci/msi.c
View file

@ -295,7 +295,7 @@ static int msi_lookup_irq(struct pci_dev *dev, int type)
}
#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;
@ -333,7 +333,7 @@ int pci_save_msi_state(struct pci_dev *dev)
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;
@ -361,7 +361,7 @@ void pci_restore_msi_state(struct pci_dev *dev)
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;
@ -409,7 +409,20 @@ int pci_save_msix_state(struct pci_dev *dev)
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;
@ -446,6 +459,12 @@ void pci_restore_msix_state(struct pci_dev *dev)
pci_write_config_word(dev, msi_control_reg(pos), save);
enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
}
void pci_restore_msi_state(struct pci_dev *dev)
{
__pci_restore_msi_state(dev);
__pci_restore_msix_state(dev);
}
#endif /* CONFIG_PM */
/**

4
drivers/pci/pci.c
View file

@ -634,8 +634,6 @@ pci_save_state(struct pci_dev *dev)
pci_read_config_dword(dev, i * 4,&dev->saved_config_space[i]);
if ((i = pci_save_msi_state(dev)) != 0)
return i;
if ((i = pci_save_msix_state(dev)) != 0)
return i;
if ((i = pci_save_pcie_state(dev)) != 0)
return i;
if ((i = pci_save_pcix_state(dev)) != 0)
@ -673,7 +671,7 @@ pci_restore_state(struct pci_dev *dev)
}
pci_restore_pcix_state(dev);
pci_restore_msi_state(dev);
pci_restore_msix_state(dev);
return 0;
}

6
drivers/pci/pci.h
View file

@ -52,17 +52,15 @@ void pci_no_msi(void);
static inline void disable_msi_mode(struct pci_dev *dev, int pos, int type) { }
static inline void pci_no_msi(void) { }
#endif
#if defined(CONFIG_PCI_MSI) && defined(CONFIG_PM)
int pci_save_msi_state(struct pci_dev *dev);
int pci_save_msix_state(struct pci_dev *dev);
void pci_restore_msi_state(struct pci_dev *dev);
void pci_restore_msix_state(struct pci_dev *dev);
#else
static inline int pci_save_msi_state(struct pci_dev *dev) { return 0; }
static inline int pci_save_msix_state(struct pci_dev *dev) { return 0; }
static inline void pci_restore_msi_state(struct pci_dev *dev) {}
static inline void pci_restore_msix_state(struct pci_dev *dev) {}
#endif
static inline int pci_no_d1d2(struct pci_dev *dev)
{
unsigned int parent_dstates = 0;