^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright IBM Corp. 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author(s):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Jan Glauber <jang@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define KMSG_COMPONENT "zpci"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/pci_debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/sclp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "pci_bus.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* Content Code Description for PCI Function Error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct zpci_ccdf_err {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) u32 reserved1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u32 fh; /* function handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u32 fid; /* function id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u32 ett : 4; /* expected table type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u32 mvn : 12; /* MSI vector number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u32 dmaas : 8; /* DMA address space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u32 : 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u32 q : 1; /* event qualifier */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) u32 rw : 1; /* read/write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) u64 faddr; /* failing address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) u32 reserved3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u16 reserved4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u16 pec; /* PCI event code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* Content Code Description for PCI Function Availability */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct zpci_ccdf_avail {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u32 reserved1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u32 fh; /* function handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u32 fid; /* function id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u32 reserved2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 reserved3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u32 reserved4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u32 reserved5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u16 reserved6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u16 pec; /* PCI event code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct pci_dev *pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) zpci_err("error CCDF:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) zpci_err_hex(ccdf, sizeof(*ccdf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (zdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pdev->error_state = pci_channel_io_perm_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pci_dev_put(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void zpci_event_error(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (zpci_is_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) __zpci_event_error(data);
^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 void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) enum zpci_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct pci_dev *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) zpci_err("avail CCDF:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) zpci_err_hex(ccdf, sizeof(*ccdf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) switch (ccdf->pec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) case 0x0301: /* Reserved|Standby -> Configured */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!zdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) zpci_create_device(ccdf->fid, ccdf->fh, ZPCI_FN_STATE_CONFIGURED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* the configuration request may be stale */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (zdev->state != ZPCI_FN_STATE_STANDBY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) zdev->fh = ccdf->fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) zdev->state = ZPCI_FN_STATE_CONFIGURED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ret = zpci_enable_device(zdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* the PCI function will be scanned once function 0 appears */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!zdev->zbus->bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) pdev = pci_scan_single_device(zdev->zbus->bus, zdev->devfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (!pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pci_bus_add_device(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pci_lock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) pci_bus_add_devices(zdev->zbus->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) pci_unlock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case 0x0302: /* Reserved -> Standby */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!zdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) zpci_create_device(ccdf->fid, ccdf->fh, ZPCI_FN_STATE_STANDBY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) zdev->fh = ccdf->fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) case 0x0303: /* Deconfiguration requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!zdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) zpci_remove_device(zdev, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ret = zpci_disable_device(zdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ret = sclp_pci_deconfigure(zdev->fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) zdev->state = ZPCI_FN_STATE_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) case 0x0304: /* Configured -> Standby|Reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!zdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* Give the driver a hint that the function is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * already unusable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) zpci_remove_device(zdev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) zdev->fh = ccdf->fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) zpci_disable_device(zdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) zdev->state = ZPCI_FN_STATE_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (!clp_get_state(ccdf->fid, &state) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) state == ZPCI_FN_STATE_RESERVED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) zpci_device_reserved(zdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) case 0x0306: /* 0x308 or 0x302 for multiple devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) zpci_remove_reserved_devices();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) clp_scan_pci_devices();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) case 0x0308: /* Standby -> Reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!zdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) zpci_device_reserved(zdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) void zpci_event_availability(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (zpci_is_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) __zpci_event_availability(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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