diff options
Diffstat (limited to 'drivers/pci/pcie/aer/ecrc.c')
| -rw-r--r-- | drivers/pci/pcie/aer/ecrc.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/drivers/pci/pcie/aer/ecrc.c b/drivers/pci/pcie/aer/ecrc.c deleted file mode 100644 index 039efb606e31..000000000000 --- a/drivers/pci/pcie/aer/ecrc.c +++ /dev/null @@ -1,117 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Enable/disable PCIe ECRC checking - * - * (C) Copyright 2009 Hewlett-Packard Development Company, L.P. - * Andrew Patterson <andrew.patterson@hp.com> - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/pci.h> -#include <linux/pci_regs.h> -#include <linux/errno.h> -#include "../../pci.h" - -#define ECRC_POLICY_DEFAULT 0 /* ECRC set by BIOS */ -#define ECRC_POLICY_OFF 1 /* ECRC off for performance */ -#define ECRC_POLICY_ON 2 /* ECRC on for data integrity */ - -static int ecrc_policy = ECRC_POLICY_DEFAULT; - -static const char *ecrc_policy_str[] = { - [ECRC_POLICY_DEFAULT] = "bios", - [ECRC_POLICY_OFF] = "off", - [ECRC_POLICY_ON] = "on" -}; - -/** - * enable_ercr_checking - enable PCIe ECRC checking for a device - * @dev: the PCI device - * - * Returns 0 on success, or negative on failure. - */ -static int enable_ecrc_checking(struct pci_dev *dev) -{ - int pos; - u32 reg32; - - if (!pci_is_pcie(dev)) - return -ENODEV; - - pos = dev->aer_cap; - if (!pos) - return -ENODEV; - - pci_read_config_dword(dev, pos + PCI_ERR_CAP, ®32); - if (reg32 & PCI_ERR_CAP_ECRC_GENC) - reg32 |= PCI_ERR_CAP_ECRC_GENE; - if (reg32 & PCI_ERR_CAP_ECRC_CHKC) - reg32 |= PCI_ERR_CAP_ECRC_CHKE; - pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32); - - return 0; -} - -/** - * disable_ercr_checking - disables PCIe ECRC checking for a device - * @dev: the PCI device - * - * Returns 0 on success, or negative on failure. - */ -static int disable_ecrc_checking(struct pci_dev *dev) -{ - int pos; - u32 reg32; - - if (!pci_is_pcie(dev)) - return -ENODEV; - - pos = dev->aer_cap; - if (!pos) - return -ENODEV; - - pci_read_config_dword(dev, pos + PCI_ERR_CAP, ®32); - reg32 &= ~(PCI_ERR_CAP_ECRC_GENE | PCI_ERR_CAP_ECRC_CHKE); - pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32); - - return 0; -} - -/** - * pcie_set_ecrc_checking - set/unset PCIe ECRC checking for a device based on global policy - * @dev: the PCI device - */ -void pcie_set_ecrc_checking(struct pci_dev *dev) -{ - switch (ecrc_policy) { - case ECRC_POLICY_DEFAULT: - return; - case ECRC_POLICY_OFF: - disable_ecrc_checking(dev); - break; - case ECRC_POLICY_ON: - enable_ecrc_checking(dev); - break; - default: - return; - } -} - -/** - * pcie_ecrc_get_policy - parse kernel command-line ecrc option - */ -void pcie_ecrc_get_policy(char *str) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(ecrc_policy_str); i++) - if (!strncmp(str, ecrc_policy_str[i], - strlen(ecrc_policy_str[i]))) - break; - if (i >= ARRAY_SIZE(ecrc_policy_str)) - return; - - ecrc_policy = i; -} |