Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation. |
Gavin Shan | cb3bc9d | 2012-02-27 20:03:51 +0000 | [diff] [blame] | 3 | * Copyright 2001-2012 IBM Corporation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 14 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 20 | #ifndef _POWERPC_EEH_H |
| 21 | #define _POWERPC_EEH_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 22 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/string.h> |
Gavin Shan | 5a71978 | 2013-06-20 13:21:01 +0800 | [diff] [blame] | 27 | #include <linux/time.h> |
Gavin Shan | 05ec424 | 2014-06-10 11:41:55 +1000 | [diff] [blame] | 28 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | struct pci_dev; |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 31 | struct pci_bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | struct device_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | #ifdef CONFIG_EEH |
| 35 | |
Gavin Shan | 8a5ad35 | 2014-04-24 18:00:17 +1000 | [diff] [blame] | 36 | /* EEH subsystem flags */ |
Gavin Shan | dc561fb | 2014-07-17 14:41:39 +1000 | [diff] [blame] | 37 | #define EEH_ENABLED 0x01 /* EEH enabled */ |
| 38 | #define EEH_FORCE_DISABLED 0x02 /* EEH disabled */ |
| 39 | #define EEH_PROBE_MODE_DEV 0x04 /* From PCI device */ |
| 40 | #define EEH_PROBE_MODE_DEVTREE 0x08 /* From device tree */ |
| 41 | #define EEH_ENABLE_IO_FOR_LOG 0x10 /* Enable IO for log */ |
Gavin Shan | 8a5ad35 | 2014-04-24 18:00:17 +1000 | [diff] [blame] | 42 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 43 | /* |
Gavin Shan | 26833a5 | 2014-04-24 18:00:23 +1000 | [diff] [blame] | 44 | * Delay for PE reset, all in ms |
| 45 | * |
| 46 | * PCI specification has reset hold time of 100 milliseconds. |
| 47 | * We have 250 milliseconds here. The PCI bus settlement time |
| 48 | * is specified as 1.5 seconds and we have 1.8 seconds. |
| 49 | */ |
| 50 | #define EEH_PE_RST_HOLD_TIME 250 |
| 51 | #define EEH_PE_RST_SETTLE_TIME 1800 |
| 52 | |
| 53 | /* |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 54 | * The struct is used to trace PE related EEH functionality. |
| 55 | * In theory, there will have one instance of the struct to |
| 56 | * be created against particular PE. In nature, PEs corelate |
| 57 | * to each other. the struct has to reflect that hierarchy in |
| 58 | * order to easily pick up those affected PEs when one particular |
| 59 | * PE has EEH errors. |
| 60 | * |
| 61 | * Also, one particular PE might be composed of PCI device, PCI |
| 62 | * bus and its subordinate components. The struct also need ship |
| 63 | * the information. Further more, one particular PE is only meaingful |
| 64 | * in the corresponding PHB. Therefore, the root PEs should be created |
| 65 | * against existing PHBs in on-to-one fashion. |
| 66 | */ |
Gavin Shan | 5efc3ad | 2012-09-11 19:16:16 +0000 | [diff] [blame] | 67 | #define EEH_PE_INVALID (1 << 0) /* Invalid */ |
| 68 | #define EEH_PE_PHB (1 << 1) /* PHB PE */ |
| 69 | #define EEH_PE_DEVICE (1 << 2) /* Device PE */ |
| 70 | #define EEH_PE_BUS (1 << 3) /* Bus PE */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 71 | |
| 72 | #define EEH_PE_ISOLATED (1 << 0) /* Isolated PE */ |
| 73 | #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */ |
Gavin Shan | d0914f5 | 2014-04-24 18:00:12 +1000 | [diff] [blame] | 74 | #define EEH_PE_RESET (1 << 2) /* PE reset in progress */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 75 | |
Gavin Shan | 807a827 | 2013-07-24 10:24:55 +0800 | [diff] [blame] | 76 | #define EEH_PE_KEEP (1 << 8) /* Keep PE on hotplug */ |
| 77 | |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 78 | struct eeh_pe { |
| 79 | int type; /* PE type: PHB/Bus/Device */ |
| 80 | int state; /* PE EEH dependent mode */ |
| 81 | int config_addr; /* Traditional PCI address */ |
| 82 | int addr; /* PE configuration address */ |
| 83 | struct pci_controller *phb; /* Associated PHB */ |
Gavin Shan | 8cdb283 | 2013-06-20 13:20:55 +0800 | [diff] [blame] | 84 | struct pci_bus *bus; /* Top PCI bus for bus PE */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 85 | int check_count; /* Times of ignored error */ |
| 86 | int freeze_count; /* Times of froze up */ |
Gavin Shan | 5a71978 | 2013-06-20 13:21:01 +0800 | [diff] [blame] | 87 | struct timeval tstamp; /* Time on first-time freeze */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 88 | int false_positives; /* Times of reported #ff's */ |
Gavin Shan | 05ec424 | 2014-06-10 11:41:55 +1000 | [diff] [blame] | 89 | atomic_t pass_dev_cnt; /* Count of passed through devs */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 90 | struct eeh_pe *parent; /* Parent PE */ |
Gavin Shan | bb593c0 | 2014-07-17 14:41:43 +1000 | [diff] [blame] | 91 | void *data; /* PE auxillary data */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 92 | struct list_head child_list; /* Link PE to the child list */ |
| 93 | struct list_head edevs; /* Link list of EEH devices */ |
| 94 | struct list_head child; /* Child PEs */ |
| 95 | }; |
| 96 | |
Gavin Shan | 9feed42 | 2013-07-24 10:24:56 +0800 | [diff] [blame] | 97 | #define eeh_pe_for_each_dev(pe, edev, tmp) \ |
| 98 | list_for_each_entry_safe(edev, tmp, &pe->edevs, list) |
Gavin Shan | 5b66352 | 2012-09-07 22:44:12 +0000 | [diff] [blame] | 99 | |
Gavin Shan | 05ec424 | 2014-06-10 11:41:55 +1000 | [diff] [blame] | 100 | static inline bool eeh_pe_passed(struct eeh_pe *pe) |
| 101 | { |
| 102 | return pe ? !!atomic_read(&pe->pass_dev_cnt) : false; |
| 103 | } |
| 104 | |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 105 | /* |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 106 | * The struct is used to trace EEH state for the associated |
| 107 | * PCI device node or PCI device. In future, it might |
| 108 | * represent PE as well so that the EEH device to form |
| 109 | * another tree except the currently existing tree of PCI |
| 110 | * buses and PCI devices |
| 111 | */ |
Gavin Shan | 4b83bd4 | 2013-07-24 10:24:59 +0800 | [diff] [blame] | 112 | #define EEH_DEV_BRIDGE (1 << 0) /* PCI bridge */ |
| 113 | #define EEH_DEV_ROOT_PORT (1 << 1) /* PCIe root port */ |
| 114 | #define EEH_DEV_DS_PORT (1 << 2) /* Downstream port */ |
| 115 | #define EEH_DEV_IRQ_DISABLED (1 << 3) /* Interrupt disabled */ |
| 116 | #define EEH_DEV_DISCONNECTED (1 << 4) /* Removing from PE */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 117 | |
Gavin Shan | f26c7a0 | 2014-01-12 14:13:45 +0800 | [diff] [blame] | 118 | #define EEH_DEV_NO_HANDLER (1 << 8) /* No error handler */ |
| 119 | #define EEH_DEV_SYSFS (1 << 9) /* Sysfs created */ |
Gavin Shan | d2b0f6f | 2014-04-24 18:00:19 +1000 | [diff] [blame] | 120 | #define EEH_DEV_REMOVED (1 << 10) /* Removed permanently */ |
Gavin Shan | ab55d21 | 2013-07-24 10:25:01 +0800 | [diff] [blame] | 121 | |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 122 | struct eeh_dev { |
| 123 | int mode; /* EEH mode */ |
| 124 | int class_code; /* Class code of the device */ |
| 125 | int config_addr; /* Config address */ |
| 126 | int pe_config_addr; /* PE config address */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 127 | u32 config_space[16]; /* Saved PCI config space */ |
Gavin Shan | 2a18dfc | 2014-04-24 18:00:16 +1000 | [diff] [blame] | 128 | int pcix_cap; /* Saved PCIx capability */ |
| 129 | int pcie_cap; /* Saved PCIe capability */ |
| 130 | int aer_cap; /* Saved AER capability */ |
Gavin Shan | 968f968 | 2012-09-07 22:44:05 +0000 | [diff] [blame] | 131 | struct eeh_pe *pe; /* Associated PE */ |
| 132 | struct list_head list; /* Form link list in the PE */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 133 | struct pci_controller *phb; /* Associated PHB */ |
| 134 | struct device_node *dn; /* Associated device node */ |
| 135 | struct pci_dev *pdev; /* Associated PCI device */ |
Gavin Shan | f5c5771 | 2013-07-24 10:24:58 +0800 | [diff] [blame] | 136 | struct pci_bus *bus; /* PCI bus for partial hotplug */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 137 | }; |
| 138 | |
| 139 | static inline struct device_node *eeh_dev_to_of_node(struct eeh_dev *edev) |
| 140 | { |
Gavin Shan | 2d5c121 | 2013-06-05 15:34:03 +0800 | [diff] [blame] | 141 | return edev ? edev->dn : NULL; |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev) |
| 145 | { |
Gavin Shan | 2d5c121 | 2013-06-05 15:34:03 +0800 | [diff] [blame] | 146 | return edev ? edev->pdev : NULL; |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 147 | } |
| 148 | |
Wei Yang | 2a58222 | 2014-09-17 10:48:26 +0800 | [diff] [blame] | 149 | static inline struct eeh_pe *eeh_dev_to_pe(struct eeh_dev* edev) |
| 150 | { |
| 151 | return edev ? edev->pe : NULL; |
| 152 | } |
| 153 | |
Gavin Shan | 7e4e786 | 2014-01-15 13:16:11 +0800 | [diff] [blame] | 154 | /* Return values from eeh_ops::next_error */ |
| 155 | enum { |
| 156 | EEH_NEXT_ERR_NONE = 0, |
| 157 | EEH_NEXT_ERR_INF, |
| 158 | EEH_NEXT_ERR_FROZEN_PE, |
| 159 | EEH_NEXT_ERR_FENCED_PHB, |
| 160 | EEH_NEXT_ERR_DEAD_PHB, |
| 161 | EEH_NEXT_ERR_DEAD_IOC |
| 162 | }; |
| 163 | |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 164 | /* |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 165 | * The struct is used to trace the registered EEH operation |
| 166 | * callback functions. Actually, those operation callback |
| 167 | * functions are heavily platform dependent. That means the |
| 168 | * platform should register its own EEH operation callback |
| 169 | * functions before any EEH further operations. |
| 170 | */ |
Gavin Shan | 8fb8f70 | 2012-02-27 20:03:55 +0000 | [diff] [blame] | 171 | #define EEH_OPT_DISABLE 0 /* EEH disable */ |
| 172 | #define EEH_OPT_ENABLE 1 /* EEH enable */ |
| 173 | #define EEH_OPT_THAW_MMIO 2 /* MMIO enable */ |
| 174 | #define EEH_OPT_THAW_DMA 3 /* DMA enable */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 175 | #define EEH_STATE_UNAVAILABLE (1 << 0) /* State unavailable */ |
| 176 | #define EEH_STATE_NOT_SUPPORT (1 << 1) /* EEH not supported */ |
| 177 | #define EEH_STATE_RESET_ACTIVE (1 << 2) /* Active reset */ |
| 178 | #define EEH_STATE_MMIO_ACTIVE (1 << 3) /* Active MMIO */ |
| 179 | #define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */ |
| 180 | #define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */ |
| 181 | #define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */ |
Gavin Shan | 212d16c | 2014-06-10 11:41:56 +1000 | [diff] [blame] | 182 | #define EEH_PE_STATE_NORMAL 0 /* Normal state */ |
| 183 | #define EEH_PE_STATE_RESET 1 /* PE reset asserted */ |
| 184 | #define EEH_PE_STATE_STOPPED_IO_DMA 2 /* Frozen PE */ |
| 185 | #define EEH_PE_STATE_STOPPED_DMA 4 /* Stopped DMA, Enabled IO */ |
| 186 | #define EEH_PE_STATE_UNAVAIL 5 /* Unavailable */ |
Gavin Shan | 2652481 | 2012-02-27 20:03:59 +0000 | [diff] [blame] | 187 | #define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */ |
| 188 | #define EEH_RESET_HOT 1 /* Hot reset */ |
| 189 | #define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */ |
Gavin Shan | 8d63329 | 2012-02-27 20:04:00 +0000 | [diff] [blame] | 190 | #define EEH_LOG_TEMP 1 /* EEH temporary error log */ |
| 191 | #define EEH_LOG_PERM 2 /* EEH permanent error log */ |
Gavin Shan | eb594a4 | 2012-02-27 20:03:57 +0000 | [diff] [blame] | 192 | |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 193 | struct eeh_ops { |
| 194 | char *name; |
| 195 | int (*init)(void); |
Gavin Shan | 21fd21f | 2013-06-20 13:20:57 +0800 | [diff] [blame] | 196 | int (*post_init)(void); |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 197 | void* (*of_probe)(struct device_node *dn, void *flag); |
Gavin Shan | 51fb5f5 | 2013-06-20 13:20:56 +0800 | [diff] [blame] | 198 | int (*dev_probe)(struct pci_dev *dev, void *flag); |
Gavin Shan | 371a395 | 2012-09-07 22:44:14 +0000 | [diff] [blame] | 199 | int (*set_option)(struct eeh_pe *pe, int option); |
| 200 | int (*get_pe_addr)(struct eeh_pe *pe); |
| 201 | int (*get_state)(struct eeh_pe *pe, int *state); |
| 202 | int (*reset)(struct eeh_pe *pe, int option); |
| 203 | int (*wait_state)(struct eeh_pe *pe, int max_wait); |
| 204 | int (*get_log)(struct eeh_pe *pe, int severity, char *drv_log, unsigned long len); |
| 205 | int (*configure_bridge)(struct eeh_pe *pe); |
Gavin Shan | 3780444 | 2012-02-27 20:04:11 +0000 | [diff] [blame] | 206 | int (*read_config)(struct device_node *dn, int where, int size, u32 *val); |
| 207 | int (*write_config)(struct device_node *dn, int where, int size, u32 val); |
Gavin Shan | 8a6b1bc | 2013-06-20 13:21:04 +0800 | [diff] [blame] | 208 | int (*next_error)(struct eeh_pe **pe); |
Gavin Shan | 1d35054 | 2014-01-03 17:47:12 +0800 | [diff] [blame] | 209 | int (*restore_config)(struct device_node *dn); |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 210 | }; |
| 211 | |
Gavin Shan | 8a5ad35 | 2014-04-24 18:00:17 +1000 | [diff] [blame] | 212 | extern int eeh_subsystem_flags; |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 213 | extern struct eeh_ops *eeh_ops; |
Gavin Shan | 4907581 | 2013-06-20 13:21:03 +0800 | [diff] [blame] | 214 | extern raw_spinlock_t confirm_error_lock; |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 215 | |
Gavin Shan | 05b1721 | 2014-07-17 14:41:38 +1000 | [diff] [blame] | 216 | static inline void eeh_add_flag(int flag) |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 217 | { |
Gavin Shan | 8a5ad35 | 2014-04-24 18:00:17 +1000 | [diff] [blame] | 218 | eeh_subsystem_flags |= flag; |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 219 | } |
| 220 | |
Gavin Shan | 05b1721 | 2014-07-17 14:41:38 +1000 | [diff] [blame] | 221 | static inline void eeh_clear_flag(int flag) |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 222 | { |
Gavin Shan | 05b1721 | 2014-07-17 14:41:38 +1000 | [diff] [blame] | 223 | eeh_subsystem_flags &= ~flag; |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 224 | } |
| 225 | |
Gavin Shan | 05b1721 | 2014-07-17 14:41:38 +1000 | [diff] [blame] | 226 | static inline bool eeh_has_flag(int flag) |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 227 | { |
Gavin Shan | 05b1721 | 2014-07-17 14:41:38 +1000 | [diff] [blame] | 228 | return !!(eeh_subsystem_flags & flag); |
| 229 | } |
| 230 | |
| 231 | static inline bool eeh_enabled(void) |
| 232 | { |
| 233 | if (eeh_has_flag(EEH_FORCE_DISABLED) || |
| 234 | !eeh_has_flag(EEH_ENABLED)) |
| 235 | return false; |
| 236 | |
| 237 | return true; |
Gavin Shan | d7bb886 | 2012-09-07 22:44:21 +0000 | [diff] [blame] | 238 | } |
Gavin Shan | 646a849 | 2012-09-07 22:44:06 +0000 | [diff] [blame] | 239 | |
Gavin Shan | 4907581 | 2013-06-20 13:21:03 +0800 | [diff] [blame] | 240 | static inline void eeh_serialize_lock(unsigned long *flags) |
| 241 | { |
| 242 | raw_spin_lock_irqsave(&confirm_error_lock, *flags); |
| 243 | } |
| 244 | |
| 245 | static inline void eeh_serialize_unlock(unsigned long flags) |
| 246 | { |
| 247 | raw_spin_unlock_irqrestore(&confirm_error_lock, flags); |
| 248 | } |
| 249 | |
Gavin Shan | cb3bc9d | 2012-02-27 20:03:51 +0000 | [diff] [blame] | 250 | /* |
| 251 | * Max number of EEH freezes allowed before we consider the device |
| 252 | * to be permanently disabled. |
| 253 | */ |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 254 | #define EEH_MAX_ALLOWED_FREEZES 5 |
| 255 | |
Gavin Shan | 22f4ab1 | 2012-09-07 22:44:08 +0000 | [diff] [blame] | 256 | typedef void *(*eeh_traverse_func)(void *data, void *flag); |
Gavin Shan | bb593c0 | 2014-07-17 14:41:43 +1000 | [diff] [blame] | 257 | void eeh_set_pe_aux_size(int size); |
Greg Kroah-Hartman | cad5cef | 2012-12-21 14:04:10 -0800 | [diff] [blame] | 258 | int eeh_phb_pe_create(struct pci_controller *phb); |
Gavin Shan | 9ff6743 | 2013-06-20 13:20:53 +0800 | [diff] [blame] | 259 | struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb); |
Gavin Shan | 0156680 | 2013-06-20 13:20:54 +0800 | [diff] [blame] | 260 | struct eeh_pe *eeh_pe_get(struct eeh_dev *edev); |
Gavin Shan | 9b84348 | 2012-09-07 22:44:09 +0000 | [diff] [blame] | 261 | int eeh_add_to_parent_pe(struct eeh_dev *edev); |
Gavin Shan | 807a827 | 2013-07-24 10:24:55 +0800 | [diff] [blame] | 262 | int eeh_rmv_from_parent_pe(struct eeh_dev *edev); |
Gavin Shan | 5a71978 | 2013-06-20 13:21:01 +0800 | [diff] [blame] | 263 | void eeh_pe_update_time_stamp(struct eeh_pe *pe); |
Gavin Shan | f5c5771 | 2013-07-24 10:24:58 +0800 | [diff] [blame] | 264 | void *eeh_pe_traverse(struct eeh_pe *root, |
| 265 | eeh_traverse_func fn, void *flag); |
Gavin Shan | 9e6d2cf | 2012-09-07 22:44:15 +0000 | [diff] [blame] | 266 | void *eeh_pe_dev_traverse(struct eeh_pe *root, |
| 267 | eeh_traverse_func fn, void *flag); |
| 268 | void eeh_pe_restore_bars(struct eeh_pe *pe); |
Gavin Shan | 357b2f3 | 2014-06-11 18:26:44 +1000 | [diff] [blame] | 269 | const char *eeh_pe_loc_get(struct eeh_pe *pe); |
Gavin Shan | 9b3c76f | 2012-09-07 22:44:19 +0000 | [diff] [blame] | 270 | struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); |
Gavin Shan | 55037d1 | 2012-09-07 22:44:07 +0000 | [diff] [blame] | 271 | |
Greg Kroah-Hartman | cad5cef | 2012-12-21 14:04:10 -0800 | [diff] [blame] | 272 | void *eeh_dev_init(struct device_node *dn, void *data); |
| 273 | void eeh_dev_phb_init_dynamic(struct pci_controller *phb); |
Gavin Shan | eeb6361 | 2013-06-27 13:46:47 +0800 | [diff] [blame] | 274 | int eeh_init(void); |
Gavin Shan | aa1e637 | 2012-02-27 20:03:53 +0000 | [diff] [blame] | 275 | int __init eeh_ops_register(struct eeh_ops *ops); |
| 276 | int __exit eeh_ops_unregister(const char *name); |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 277 | int eeh_check_failure(const volatile void __iomem *token); |
Gavin Shan | f8f7d63 | 2012-09-07 22:44:22 +0000 | [diff] [blame] | 278 | int eeh_dev_check_failure(struct eeh_dev *edev); |
Gavin Shan | eeb6361 | 2013-06-27 13:46:47 +0800 | [diff] [blame] | 279 | void eeh_addr_cache_build(void); |
Gavin Shan | f285649 | 2013-07-24 10:24:52 +0800 | [diff] [blame] | 280 | void eeh_add_device_early(struct device_node *); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 281 | void eeh_add_device_tree_early(struct device_node *); |
Gavin Shan | f285649 | 2013-07-24 10:24:52 +0800 | [diff] [blame] | 282 | void eeh_add_device_late(struct pci_dev *); |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 283 | void eeh_add_device_tree_late(struct pci_bus *); |
Thadeu Lima de Souza Cascardo | 6a040ce | 2012-12-28 09:13:19 +0000 | [diff] [blame] | 284 | void eeh_add_sysfs_files(struct pci_bus *); |
Gavin Shan | 807a827 | 2013-07-24 10:24:55 +0800 | [diff] [blame] | 285 | void eeh_remove_device(struct pci_dev *); |
Gavin Shan | 212d16c | 2014-06-10 11:41:56 +1000 | [diff] [blame] | 286 | int eeh_dev_open(struct pci_dev *pdev); |
| 287 | void eeh_dev_release(struct pci_dev *pdev); |
| 288 | struct eeh_pe *eeh_iommu_group_to_pe(struct iommu_group *group); |
| 289 | int eeh_pe_set_option(struct eeh_pe *pe, int option); |
| 290 | int eeh_pe_get_state(struct eeh_pe *pe); |
| 291 | int eeh_pe_reset(struct eeh_pe *pe, int option); |
| 292 | int eeh_pe_configure(struct eeh_pe *pe); |
Linas Vepstas | e2a296e | 2005-11-03 18:51:31 -0600 | [diff] [blame] | 293 | |
| 294 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. |
| 296 | * |
| 297 | * If this macro yields TRUE, the caller relays to eeh_check_failure() |
| 298 | * which does further tests out of line. |
| 299 | */ |
Gavin Shan | 2ec5a0a | 2014-02-12 15:24:55 +0800 | [diff] [blame] | 300 | #define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_enabled()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | /* |
| 303 | * Reads from a device which has been isolated by EEH will return |
| 304 | * all 1s. This macro gives an all-1s value of the given size (in |
| 305 | * bytes: 1, 2, or 4) for comparing with the result of a read. |
| 306 | */ |
| 307 | #define EEH_IO_ERROR_VALUE(size) (~0U >> ((4 - (size)) * 8)) |
| 308 | |
| 309 | #else /* !CONFIG_EEH */ |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 310 | |
Gavin Shan | 2ec5a0a | 2014-02-12 15:24:55 +0800 | [diff] [blame] | 311 | static inline bool eeh_enabled(void) |
| 312 | { |
| 313 | return false; |
| 314 | } |
| 315 | |
Gavin Shan | 51fb5f5 | 2013-06-20 13:20:56 +0800 | [diff] [blame] | 316 | static inline int eeh_init(void) |
| 317 | { |
| 318 | return 0; |
| 319 | } |
| 320 | |
Gavin Shan | eb740b5 | 2012-02-27 20:04:04 +0000 | [diff] [blame] | 321 | static inline void *eeh_dev_init(struct device_node *dn, void *data) |
| 322 | { |
| 323 | return NULL; |
| 324 | } |
| 325 | |
| 326 | static inline void eeh_dev_phb_init_dynamic(struct pci_controller *phb) { } |
| 327 | |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 328 | static inline int eeh_check_failure(const volatile void __iomem *token) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 330 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Gavin Shan | f8f7d63 | 2012-09-07 22:44:22 +0000 | [diff] [blame] | 333 | #define eeh_dev_check_failure(x) (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Gavin Shan | 3ab96a0 | 2012-09-07 22:44:23 +0000 | [diff] [blame] | 335 | static inline void eeh_addr_cache_build(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Gavin Shan | f285649 | 2013-07-24 10:24:52 +0800 | [diff] [blame] | 337 | static inline void eeh_add_device_early(struct device_node *dn) { } |
| 338 | |
Haren Myneni | 022930e | 2005-12-27 18:58:29 -0800 | [diff] [blame] | 339 | static inline void eeh_add_device_tree_early(struct device_node *dn) { } |
| 340 | |
Gavin Shan | f285649 | 2013-07-24 10:24:52 +0800 | [diff] [blame] | 341 | static inline void eeh_add_device_late(struct pci_dev *dev) { } |
| 342 | |
John Rose | 827c1a6 | 2006-02-24 11:34:23 -0600 | [diff] [blame] | 343 | static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } |
| 344 | |
Thadeu Lima de Souza Cascardo | 6a040ce | 2012-12-28 09:13:19 +0000 | [diff] [blame] | 345 | static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } |
| 346 | |
Gavin Shan | 807a827 | 2013-07-24 10:24:55 +0800 | [diff] [blame] | 347 | static inline void eeh_remove_device(struct pci_dev *dev) { } |
Gavin Shan | 646a849 | 2012-09-07 22:44:06 +0000 | [diff] [blame] | 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | #define EEH_POSSIBLE_ERROR(val, type) (0) |
| 350 | #define EEH_IO_ERROR_VALUE(size) (-1UL) |
| 351 | #endif /* CONFIG_EEH */ |
| 352 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 353 | #ifdef CONFIG_PPC64 |
Linas Vepstas | 172ca92 | 2005-11-03 18:50:04 -0600 | [diff] [blame] | 354 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | * MMIO read/write operations with EEH support. |
| 356 | */ |
| 357 | static inline u8 eeh_readb(const volatile void __iomem *addr) |
| 358 | { |
| 359 | u8 val = in_8(addr); |
| 360 | if (EEH_POSSIBLE_ERROR(val, u8)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 361 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | return val; |
| 363 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
| 365 | static inline u16 eeh_readw(const volatile void __iomem *addr) |
| 366 | { |
| 367 | u16 val = in_le16(addr); |
| 368 | if (EEH_POSSIBLE_ERROR(val, u16)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 369 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | return val; |
| 371 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | static inline u32 eeh_readl(const volatile void __iomem *addr) |
| 374 | { |
| 375 | u32 val = in_le32(addr); |
| 376 | if (EEH_POSSIBLE_ERROR(val, u32)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 377 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return val; |
| 379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | static inline u64 eeh_readq(const volatile void __iomem *addr) |
| 382 | { |
| 383 | u64 val = in_le64(addr); |
| 384 | if (EEH_POSSIBLE_ERROR(val, u64)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 385 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | return val; |
| 387 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 388 | |
| 389 | static inline u16 eeh_readw_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 391 | u16 val = in_be16(addr); |
| 392 | if (EEH_POSSIBLE_ERROR(val, u16)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 393 | eeh_check_failure(addr); |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 394 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 396 | |
| 397 | static inline u32 eeh_readl_be(const volatile void __iomem *addr) |
| 398 | { |
| 399 | u32 val = in_be32(addr); |
| 400 | if (EEH_POSSIBLE_ERROR(val, u32)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 401 | eeh_check_failure(addr); |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 402 | return val; |
| 403 | } |
| 404 | |
| 405 | static inline u64 eeh_readq_be(const volatile void __iomem *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
| 407 | u64 val = in_be64(addr); |
| 408 | if (EEH_POSSIBLE_ERROR(val, u64)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 409 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | return val; |
| 411 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 413 | static inline void eeh_memcpy_fromio(void *dest, const |
| 414 | volatile void __iomem *src, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | unsigned long n) |
| 416 | { |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 417 | _memcpy_fromio(dest, src, n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | /* Look for ffff's here at dest[n]. Assume that at least 4 bytes |
| 420 | * were copied. Check all four bytes. |
| 421 | */ |
Benjamin Herrenschmidt | 68a6435 | 2006-11-13 09:27:39 +1100 | [diff] [blame] | 422 | if (n >= 4 && EEH_POSSIBLE_ERROR(*((u32 *)(dest + n - 4)), u32)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 423 | eeh_check_failure(src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | /* in-string eeh macros */ |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 427 | static inline void eeh_readsb(const volatile void __iomem *addr, void * buf, |
| 428 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 430 | _insb(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (EEH_POSSIBLE_ERROR((*(((u8*)buf)+ns-1)), u8)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 432 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | } |
| 434 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 435 | static inline void eeh_readsw(const volatile void __iomem *addr, void * buf, |
| 436 | int ns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 438 | _insw(addr, buf, ns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | if (EEH_POSSIBLE_ERROR((*(((u16*)buf)+ns-1)), u16)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 440 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
| 442 | |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 443 | static inline void eeh_readsl(const volatile void __iomem *addr, void * buf, |
| 444 | int nl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
Benjamin Herrenschmidt | 4cb3cee | 2006-11-11 17:25:10 +1100 | [diff] [blame] | 446 | _insl(addr, buf, nl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | if (EEH_POSSIBLE_ERROR((*(((u32*)buf)+nl-1)), u32)) |
Gavin Shan | 3e93805 | 2014-09-30 12:38:50 +1000 | [diff] [blame^] | 448 | eeh_check_failure(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
| 450 | |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 451 | #endif /* CONFIG_PPC64 */ |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 452 | #endif /* __KERNEL__ */ |
Benjamin Herrenschmidt | 8b8da35 | 2008-10-27 19:48:37 +0000 | [diff] [blame] | 453 | #endif /* _POWERPC_EEH_H */ |