From: Brett M Russ Date: Mon, 15 Aug 2005 19:23:41 +0000 (-0400) Subject: [PATCH] PCI/libata INTx cleanup X-Git-Tag: v2.6.14-rc1~492^2~20^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a04ce0ffcaf561994ecf382cd3caad75556dc499;p=linux-2.6 [PATCH] PCI/libata INTx cleanup Simple cleanup to eliminate X copies of the pci_enable_intx() function in libata. Moved ahci.c's pci_intx() to pci.c and use it throughout libata and msi.c. Signed-off-by: Brett Russ Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 532f73bb22..ee8677bda9 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -439,10 +439,7 @@ static void enable_msi_mode(struct pci_dev *dev, int pos, int type) } if (pci_find_capability(dev, PCI_CAP_ID_EXP)) { /* PCI Express Endpoint device detected */ - u16 cmd; - pci_read_config_word(dev, PCI_COMMAND, &cmd); - cmd |= PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(dev, PCI_COMMAND, cmd); + pci_intx(dev, 0); /* disable intx */ } } @@ -461,10 +458,7 @@ void disable_msi_mode(struct pci_dev *dev, int pos, int type) } if (pci_find_capability(dev, PCI_CAP_ID_EXP)) { /* PCI Express Endpoint device detected */ - u16 cmd; - pci_read_config_word(dev, PCI_COMMAND, &cmd); - cmd &= ~PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(dev, PCI_COMMAND, cmd); + pci_intx(dev, 1); /* enable intx */ } } diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e179af3186..ccff633a39 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -798,6 +798,31 @@ pci_clear_mwi(struct pci_dev *dev) } } +/** + * pci_intx - enables/disables PCI INTx for device dev + * @dev: the PCI device to operate on + * @enable: boolean + * + * Enables/disables PCI INTx for device dev + */ +void +pci_intx(struct pci_dev *pdev, int enable) +{ + u16 pci_command, new; + + pci_read_config_word(pdev, PCI_COMMAND, &pci_command); + + if (enable) { + new = pci_command & ~PCI_COMMAND_INTX_DISABLE; + } else { + new = pci_command | PCI_COMMAND_INTX_DISABLE; + } + + if (new != pci_command) { + pci_write_config_word(pdev, PCI_COMMAND, pci_command); + } +} + #ifndef HAVE_ARCH_PCI_SET_DMA_MASK /* * These can be overridden by arch-specific implementations @@ -875,6 +900,7 @@ EXPORT_SYMBOL(pci_request_region); EXPORT_SYMBOL(pci_set_master); EXPORT_SYMBOL(pci_set_mwi); EXPORT_SYMBOL(pci_clear_mwi); +EXPORT_SYMBOL_GPL(pci_intx); EXPORT_SYMBOL(pci_set_dma_mask); EXPORT_SYMBOL(pci_set_consistent_dma_mask); EXPORT_SYMBOL(pci_assign_resource); diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 320df6cd3d..c2c8fa828e 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -865,22 +865,6 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent) return 0; } -/* move to PCI layer, integrate w/ MSI stuff */ -static void pci_intx(struct pci_dev *pdev, int enable) -{ - u16 pci_command, new; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - - if (enable) - new = pci_command & ~PCI_COMMAND_INTX_DISABLE; - else - new = pci_command | PCI_COMMAND_INTX_DISABLE; - - if (new != pci_command) - pci_write_config_word(pdev, PCI_COMMAND, pci_command); -} - static void ahci_print_info(struct ata_probe_ent *probe_ent) { struct ahci_host_priv *hpriv = probe_ent->private_data; diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 5f86885290..87e0c36f15 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -568,18 +568,6 @@ static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev) } } -/* move to PCI layer, integrate w/ MSI stuff */ -static void pci_enable_intx(struct pci_dev *pdev) -{ - u16 pci_command; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - if (pci_command & PCI_COMMAND_INTX_DISABLE) { - pci_command &= ~PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(pdev, PCI_COMMAND, pci_command); - } -} - #define AHCI_PCI_BAR 5 #define AHCI_GLOBAL_CTL 0x04 #define AHCI_ENABLE (1 << 31) @@ -677,7 +665,7 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) * message-signalled interrupts currently). */ if (port_info[0]->host_flags & PIIX_FLAG_CHECKINTR) - pci_enable_intx(pdev); + pci_intx(pdev, 1); if (combined) { port_info[sata_chan] = &piix_port_info[ent->driver_data]; diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c index 7d1aaa99aa..2bd3f11ac0 100644 --- a/drivers/scsi/sata_sis.c +++ b/drivers/scsi/sata_sis.c @@ -233,18 +233,6 @@ static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) } } -/* move to PCI layer, integrate w/ MSI stuff */ -static void pci_enable_intx(struct pci_dev *pdev) -{ - u16 pci_command; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - if (pci_command & PCI_COMMAND_INTX_DISABLE) { - pci_command &= ~PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(pdev, PCI_COMMAND, pci_command); - } -} - static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { struct ata_probe_ent *probe_ent = NULL; @@ -319,7 +307,7 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) } pci_set_master(pdev); - pci_enable_intx(pdev); + pci_intx(pdev, 1); /* FIXME: check ata_device_add return value */ ata_device_add(probe_ent); diff --git a/drivers/scsi/sata_uli.c b/drivers/scsi/sata_uli.c index 42e13ed8eb..4c9fb8b71b 100644 --- a/drivers/scsi/sata_uli.c +++ b/drivers/scsi/sata_uli.c @@ -176,18 +176,6 @@ static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) uli_scr_cfg_write(ap, sc_reg, val); } -/* move to PCI layer, integrate w/ MSI stuff */ -static void pci_enable_intx(struct pci_dev *pdev) -{ - u16 pci_command; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - if (pci_command & PCI_COMMAND_INTX_DISABLE) { - pci_command &= ~PCI_COMMAND_INTX_DISABLE; - pci_write_config_word(pdev, PCI_COMMAND, pci_command); - } -} - static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { struct ata_probe_ent *probe_ent; @@ -260,7 +248,7 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) } pci_set_master(pdev); - pci_enable_intx(pdev); + pci_intx(pdev, 1); /* FIXME: check ata_device_add return value */ ata_device_add(probe_ent); diff --git a/include/linux/pci.h b/include/linux/pci.h index 7004dde7fe..6caaba0af4 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -383,6 +383,7 @@ void pci_set_master(struct pci_dev *dev); #define HAVE_PCI_SET_MWI int pci_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); +void pci_intx(struct pci_dev *dev, int enable); int pci_set_dma_mask(struct pci_dev *dev, u64 mask); int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask); void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);