From michael@ozlabs.org Thu Jan 25 14:13:06 2007 From: Michael Ellerman Date: Thu, 25 Jan 2007 19:34:08 +1100 Subject: MSI: Combine pci_(save|restore)_msi/msix_state To: linux-pci@atrey.karlin.mff.cuni.cz Cc: Greg Kroah-Hartman , Eric W. Biederman , David S. Miller , Kyle McMartin , , Brice Goglin , Message-ID: <20070125083409.D4EBADE25B@ozlabs.org> 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 Signed-off-by: Greg Kroah-Hartman --- drivers/pci/msi.c | 27 +++++++++++++++++++++++---- drivers/pci/pci.c | 4 +--- drivers/pci/pci.h | 6 ++---- 3 files changed, 26 insertions(+), 11 deletions(-) --- gregkh-2.6.orig/drivers/pci/msi.c +++ gregkh-2.6/drivers/pci/msi.c @@ -295,7 +295,7 @@ static int msi_lookup_irq(struct pci_dev } #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 *d 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_de 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 * 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_d 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 */ /** --- gregkh-2.6.orig/drivers/pci/pci.c +++ gregkh-2.6/drivers/pci/pci.c @@ -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; } --- gregkh-2.6.orig/drivers/pci/pci.h +++ gregkh-2.6/drivers/pci/pci.h @@ -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;