From b340cacc1b47d8fc15051aaf9b2d44678e245ba9 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 10 Jan 2014 14:00:47 -0700 Subject: PCI: Removed unused parts of Page Request Interface support My philosophy is unused code is dead code. And dead code is subject to bit rot and is a likely source of bugs. Use it or lose it. This reverts parts of c320b976d783 ("PCI: Add implementation for PRI capability"), removing these interfaces: pci_pri_enabled() pci_pri_stopped() pci_pri_status() [bhelgaas: split to separate patch] Signed-off-by: Stephen Hemminger Signed-off-by: Bjorn Helgaas CC: Joerg Roedel --- drivers/pci/ats.c | 82 ------------------------------------------------------- 1 file changed, 82 deletions(-) (limited to 'drivers') diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c index e52d7ffa38b..a8099d4d0c9 100644 --- a/drivers/pci/ats.c +++ b/drivers/pci/ats.c @@ -234,27 +234,6 @@ void pci_disable_pri(struct pci_dev *pdev) } EXPORT_SYMBOL_GPL(pci_disable_pri); -/** - * pci_pri_enabled - Checks if PRI capability is enabled - * @pdev: PCI device structure - * - * Returns true if PRI is enabled on the device, false otherwise - */ -bool pci_pri_enabled(struct pci_dev *pdev) -{ - u16 control; - int pos; - - pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); - if (!pos) - return false; - - pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); - - return (control & PCI_PRI_CTRL_ENABLE) ? true : false; -} -EXPORT_SYMBOL_GPL(pci_pri_enabled); - /** * pci_reset_pri - Resets device's PRI state * @pdev: PCI device structure @@ -282,67 +261,6 @@ int pci_reset_pri(struct pci_dev *pdev) return 0; } EXPORT_SYMBOL_GPL(pci_reset_pri); - -/** - * pci_pri_stopped - Checks whether the PRI capability is stopped - * @pdev: PCI device structure - * - * Returns true if the PRI capability on the device is disabled and the - * device has no outstanding PRI requests, false otherwise. The device - * indicates this via the STOPPED bit in the status register of the - * capability. - * The device internal state can be cleared by resetting the PRI state - * with pci_reset_pri(). This can force the capability into the STOPPED - * state. - */ -bool pci_pri_stopped(struct pci_dev *pdev) -{ - u16 control, status; - int pos; - - pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); - if (!pos) - return true; - - pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); - pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status); - - if (control & PCI_PRI_CTRL_ENABLE) - return false; - - return (status & PCI_PRI_STATUS_STOPPED) ? true : false; -} -EXPORT_SYMBOL_GPL(pci_pri_stopped); - -/** - * pci_pri_status - Request PRI status of a device - * @pdev: PCI device structure - * - * Returns negative value on failure, status on success. The status can - * be checked against status-bits. Supported bits are currently: - * PCI_PRI_STATUS_RF: Response failure - * PCI_PRI_STATUS_UPRGI: Unexpected Page Request Group Index - * PCI_PRI_STATUS_STOPPED: PRI has stopped - */ -int pci_pri_status(struct pci_dev *pdev) -{ - u16 status, control; - int pos; - - pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); - if (!pos) - return -EINVAL; - - pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); - pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status); - - /* Stopped bit is undefined when enable == 1, so clear it */ - if (control & PCI_PRI_CTRL_ENABLE) - status &= ~PCI_PRI_STATUS_STOPPED; - - return status; -} -EXPORT_SYMBOL_GPL(pci_pri_status); #endif /* CONFIG_PCI_PRI */ #ifdef CONFIG_PCI_PASID -- cgit v1.2.3-18-g5258