drivers/pci/pcie/aer/aerdrv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2006 Intel Corp.
   4  *      Tom Long Nguyen (tom.l.nguyen@intel.com)
   5  *      Zhang Yanmin (yanmin.zhang@intel.com)
   6  *
   7  */
   8
   9 #ifndef _AERDRV_H_
  10 #define _AERDRV_H_
  11
  12 #include <linux/workqueue.h>
  13 #include <linux/pcieport_if.h>
  14 #include <linux/aer.h>
  15 #include <linux/interrupt.h>
  16
  17 #define SYSTEM_ERROR_INTR_ON_MESG_MASK  (PCI_EXP_RTCTL_SECEE|   \
  18                                         PCI_EXP_RTCTL_SENFEE|   \
  19                                         PCI_EXP_RTCTL_SEFEE)
  20 #define ROOT_PORT_INTR_ON_MESG_MASK     (PCI_ERR_ROOT_CMD_COR_EN|       \
  21                                         PCI_ERR_ROOT_CMD_NONFATAL_EN|   \
  22                                         PCI_ERR_ROOT_CMD_FATAL_EN)
  23 #define ERR_COR_ID(d)                   (d & 0xffff)
  24 #define ERR_UNCOR_ID(d)                 (d >> 16)
  25
  26 #define AER_ERROR_SOURCES_MAX           100
  27
  28 #define AER_LOG_TLP_MASKS               (PCI_ERR_UNC_POISON_TLP|        \
  29                                         PCI_ERR_UNC_ECRC|               \
  30                                         PCI_ERR_UNC_UNSUP|              \
  31                                         PCI_ERR_UNC_COMP_ABORT|         \
  32                                         PCI_ERR_UNC_UNX_COMP|           \
  33                                         PCI_ERR_UNC_MALF_TLP)
  34
  35 #define AER_MAX_MULTI_ERR_DEVICES       5       /* Not likely to have more */
  36 struct aer_err_info {
  37         struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
  38         int error_dev_num;
  39
  40         unsigned int id:16;
  41
  42         unsigned int severity:2;        /* 0:NONFATAL | 1:FATAL | 2:COR */
  43         unsigned int __pad1:5;
  44         unsigned int multi_error_valid:1;
  45
  46         unsigned int first_error:5;
  47         unsigned int __pad2:2;
  48         unsigned int tlp_header_valid:1;
  49
  50         unsigned int status;            /* COR/UNCOR Error Status */
  51         unsigned int mask;              /* COR/UNCOR Error Mask */
  52         struct aer_header_log_regs tlp; /* TLP Header */
  53 };
  54
  55 struct aer_err_source {
  56         unsigned int status;
  57         unsigned int id;
  58 };
  59
  60 struct aer_rpc {
  61         struct pcie_device *rpd;        /* Root Port device */
  62         struct work_struct dpc_handler;
  63         struct aer_err_source e_sources[AER_ERROR_SOURCES_MAX];
  64         struct aer_err_info e_info;
  65         unsigned short prod_idx;        /* Error Producer Index */
  66         unsigned short cons_idx;        /* Error Consumer Index */
  67         int isr;
  68         spinlock_t e_lock;              /*
  69                                          * Lock access to Error Status/ID Regs
  70                                          * and error producer/consumer index
  71                                          */
  72         struct mutex rpc_mutex;         /*
  73                                          * only one thread could do
  74                                          * recovery on the same
  75                                          * root port hierarchy
  76                                          */
  77 };
  78
  79 struct aer_broadcast_data {
  80         enum pci_channel_state state;
  81         enum pci_ers_result result;
  82 };
  83
  84 static inline pci_ers_result_t merge_result(enum pci_ers_result orig,
  85                 enum pci_ers_result new)
  86 {
  87         if (new == PCI_ERS_RESULT_NO_AER_DRIVER)
  88                 return PCI_ERS_RESULT_NO_AER_DRIVER;
  89
  90         if (new == PCI_ERS_RESULT_NONE)
  91                 return orig;
  92
  93         switch (orig) {
  94         case PCI_ERS_RESULT_CAN_RECOVER:
  95         case PCI_ERS_RESULT_RECOVERED:
  96                 orig = new;
  97                 break;
  98         case PCI_ERS_RESULT_DISCONNECT:
  99                 if (new == PCI_ERS_RESULT_NEED_RESET)
 100                         orig = PCI_ERS_RESULT_NEED_RESET;
 101                 break;
 102         default:
 103                 break;
 104         }
 105
 106         return orig;
 107 }
 108
 109 extern struct bus_type pcie_port_bus_type;
 110 void aer_isr(struct work_struct *work);
 111 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 112 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info);
 113 irqreturn_t aer_irq(int irq, void *context);
 114
 115 #ifdef CONFIG_ACPI_APEI
 116 int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
 117 #else
 118 static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev)
 119 {
 120         if (pci_dev->__aer_firmware_first_valid)
 121                 return pci_dev->__aer_firmware_first;
 122         return 0;
 123 }
 124 #endif
 125 #endif /* _AERDRV_H_ */