^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright IBM Corporation 2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright Linas Vepstas <linas@austin.ibm.com> 2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/ppc-pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/pci-bridge.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * @_name: name of file in sysfs directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * @_memb: name of member in struct eeh_dev to access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * @_format: printf format for display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * All of the attributes look very similar, so just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * auto-gen a cut-n-paste routine to display them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define EEH_SHOW_ATTR(_name,_memb,_format) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static ssize_t eeh_show_##_name(struct device *dev, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct device_attribute *attr, char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct pci_dev *pdev = to_pci_dev(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (!edev) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return 0; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return sprintf(buf, _format "\n", edev->_memb); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static DEVICE_ATTR(_name, 0444, eeh_show_##_name, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) EEH_SHOW_ATTR(eeh_mode, mode, "0x%x");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) EEH_SHOW_ATTR(eeh_pe_config_addr, pe_config_addr, "0x%x");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static ssize_t eeh_pe_state_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct pci_dev *pdev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (!edev || !edev->pe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) state = eeh_ops->get_state(edev->pe, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return sprintf(buf, "0x%08x 0x%08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) state, edev->pe->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static ssize_t eeh_pe_state_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct pci_dev *pdev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!edev || !edev->pe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* Nothing to do if it's not frozen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!(edev->pe->state & EEH_PE_ISOLATED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (eeh_unfreeze_pe(edev->pe))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) eeh_pe_state_clear(edev->pe, EEH_PE_ISOLATED, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static DEVICE_ATTR_RW(eeh_pe_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #if defined(CONFIG_PCI_IOV) && defined(CONFIG_PPC_PSERIES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static ssize_t eeh_notify_resume_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct pci_dev *pdev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct pci_dn *pdn = pci_get_pdn(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!edev || !edev->pe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return sprintf(buf, "%d\n", pdn->last_allow_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static ssize_t eeh_notify_resume_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct pci_dev *pdev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (!edev || !edev->pe || !eeh_ops->notify_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (eeh_ops->notify_resume(edev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static DEVICE_ATTR_RW(eeh_notify_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int eeh_notify_resume_add(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) rc = device_create_file(&pdev->dev, &dev_attr_eeh_notify_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static void eeh_notify_resume_remove(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) np = pci_device_to_OF_node(pdev->is_physfn ? pdev : pdev->physfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (of_property_read_bool(np, "ibm,is-open-sriov-pf"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) device_remove_file(&pdev->dev, &dev_attr_eeh_notify_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static inline int eeh_notify_resume_add(struct pci_dev *pdev) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static inline void eeh_notify_resume_remove(struct pci_dev *pdev) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #endif /* CONFIG_PCI_IOV && CONFIG PPC_PSERIES*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) void eeh_sysfs_add_device(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int rc=0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!eeh_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (edev && (edev->mode & EEH_DEV_SYSFS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) rc += eeh_notify_resume_add(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) pr_warn("EEH: Unable to create sysfs entries\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) else if (edev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) edev->mode |= EEH_DEV_SYSFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void eeh_sysfs_remove_device(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (!edev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) WARN_ON(eeh_enabled());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) edev->mode &= ~EEH_DEV_SYSFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * The parent directory might have been removed. We needn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * continue for that case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (!pdev->dev.kobj.sd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) eeh_notify_resume_remove(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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