1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Standard Hot Plug Controller Driver 4 * 5 * Copyright (C) 1995,2001 Compaq Computer Corporation 6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) 7 * Copyright (C) 2001 IBM 8 * Copyright (C) 2003-2004 Intel Corporation 9 * 10 * All rights reserved. 11 * 12 * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com> 13 * 14 */ 15 #ifndef _SHPCHP_H 16 #define _SHPCHP_H 17 18 #include <linux/types.h> 19 #include <linux/pci.h> 20 #include <linux/pci_hotplug.h> 21 #include <linux/delay.h> 22 #include <linux/sched/signal.h> /* signal_pending(), struct timer_list */ 23 #include <linux/mutex.h> 24 #include <linux/workqueue.h> 25 26 #if !defined(MODULE) 27 #define MY_NAME "shpchp" 28 #else 29 #define MY_NAME THIS_MODULE->name 30 #endif 31 32 extern bool shpchp_poll_mode; 33 extern int shpchp_poll_time; 34 extern bool shpchp_debug; 35 36 #define dbg(format, arg...) \ 37 do { \ 38 if (shpchp_debug) \ 39 printk(KERN_DEBUG "%s: " format, MY_NAME, ## arg); \ 40 } while (0) 41 #define err(format, arg...) \ 42 printk(KERN_ERR "%s: " format, MY_NAME, ## arg) 43 #define info(format, arg...) \ 44 printk(KERN_INFO "%s: " format, MY_NAME, ## arg) 45 #define warn(format, arg...) \ 46 printk(KERN_WARNING "%s: " format, MY_NAME, ## arg) 47 48 #define ctrl_dbg(ctrl, format, arg...) \ 49 do { \ 50 if (shpchp_debug) \ 51 pci_printk(KERN_DEBUG, ctrl->pci_dev, \ 52 format, ## arg); \ 53 } while (0) 54 #define ctrl_err(ctrl, format, arg...) \ 55 pci_err(ctrl->pci_dev, format, ## arg) 56 #define ctrl_info(ctrl, format, arg...) \ 57 pci_info(ctrl->pci_dev, format, ## arg) 58 #define ctrl_warn(ctrl, format, arg...) \ 59 pci_warn(ctrl->pci_dev, format, ## arg) 60 61 62 #define SLOT_NAME_SIZE 10 63 struct slot { 64 u8 bus; 65 u8 device; 66 u16 status; 67 u32 number; 68 u8 is_a_board; 69 u8 state; 70 u8 attention_save; 71 u8 presence_save; 72 u8 latch_save; 73 u8 pwr_save; 74 struct controller *ctrl; 75 const struct hpc_ops *hpc_ops; 76 struct hotplug_slot hotplug_slot; 77 struct list_head slot_list; 78 struct delayed_work work; /* work for button event */ 79 struct mutex lock; 80 struct workqueue_struct *wq; 81 u8 hp_slot; 82 }; 83 84 struct event_info { 85 u32 event_type; 86 struct slot *p_slot; 87 struct work_struct work; 88 }; 89 90 struct controller { 91 struct mutex crit_sect; /* critical section mutex */ 92 struct mutex cmd_lock; /* command lock */ 93 int num_slots; /* Number of slots on ctlr */ 94 int slot_num_inc; /* 1 or -1 */ 95 struct pci_dev *pci_dev; 96 struct list_head slot_list; 97 const struct hpc_ops *hpc_ops; 98 wait_queue_head_t queue; /* sleep & wake process */ 99 u8 slot_device_offset; 100 u32 pcix_misc2_reg; /* for amd pogo errata */ 101 u32 first_slot; /* First physical slot number */ 102 u32 cap_offset; 103 unsigned long mmio_base; 104 unsigned long mmio_size; 105 void __iomem *creg; 106 struct timer_list poll_timer; 107 }; 108 109 /* Define AMD SHPC ID */ 110 #define PCI_DEVICE_ID_AMD_POGO_7458 0x7458 111 112 /* AMD PCI-X bridge registers */ 113 #define PCIX_MEM_BASE_LIMIT_OFFSET 0x1C 114 #define PCIX_MISCII_OFFSET 0x48 115 #define PCIX_MISC_BRIDGE_ERRORS_OFFSET 0x80 116 117 /* AMD PCIX_MISCII masks and offsets */ 118 #define PERRNONFATALENABLE_MASK 0x00040000 119 #define PERRFATALENABLE_MASK 0x00080000 120 #define PERRFLOODENABLE_MASK 0x00100000 121 #define SERRNONFATALENABLE_MASK 0x00200000 122 #define SERRFATALENABLE_MASK 0x00400000 123 124 /* AMD PCIX_MISC_BRIDGE_ERRORS masks and offsets */ 125 #define PERR_OBSERVED_MASK 0x00000001 126 127 /* AMD PCIX_MEM_BASE_LIMIT masks */ 128 #define RSE_MASK 0x40000000 129 130 #define INT_BUTTON_IGNORE 0 131 #define INT_PRESENCE_ON 1 132 #define INT_PRESENCE_OFF 2 133 #define INT_SWITCH_CLOSE 3 134 #define INT_SWITCH_OPEN 4 135 #define INT_POWER_FAULT 5 136 #define INT_POWER_FAULT_CLEAR 6 137 #define INT_BUTTON_PRESS 7 138 #define INT_BUTTON_RELEASE 8 139 #define INT_BUTTON_CANCEL 9 140 141 #define STATIC_STATE 0 142 #define BLINKINGON_STATE 1 143 #define BLINKINGOFF_STATE 2 144 #define POWERON_STATE 3 145 #define POWEROFF_STATE 4 146 147 /* Error messages */ 148 #define INTERLOCK_OPEN 0x00000002 149 #define ADD_NOT_SUPPORTED 0x00000003 150 #define CARD_FUNCTIONING 0x00000005 151 #define ADAPTER_NOT_SAME 0x00000006 152 #define NO_ADAPTER_PRESENT 0x00000009 153 #define NOT_ENOUGH_RESOURCES 0x0000000B 154 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C 155 #define WRONG_BUS_FREQUENCY 0x0000000D 156 #define POWER_FAILURE 0x0000000E 157 158 int __must_check shpchp_create_ctrl_files(struct controller *ctrl); 159 void shpchp_remove_ctrl_files(struct controller *ctrl); 160 int shpchp_sysfs_enable_slot(struct slot *slot); 161 int shpchp_sysfs_disable_slot(struct slot *slot); 162 u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl); 163 u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl); 164 u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl); 165 u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl); 166 int shpchp_configure_device(struct slot *p_slot); 167 int shpchp_unconfigure_device(struct slot *p_slot); 168 void cleanup_slots(struct controller *ctrl); 169 void shpchp_queue_pushbutton_work(struct work_struct *work); 170 int shpc_init(struct controller *ctrl, struct pci_dev *pdev); 171 172 static inline const char *slot_name(struct slot *slot) 173 { 174 return hotplug_slot_name(&slot->hotplug_slot); 175 } 176 177 struct ctrl_reg { 178 volatile u32 base_offset; 179 volatile u32 slot_avail1; 180 volatile u32 slot_avail2; 181 volatile u32 slot_config; 182 volatile u16 sec_bus_config; 183 volatile u8 msi_ctrl; 184 volatile u8 prog_interface; 185 volatile u16 cmd; 186 volatile u16 cmd_status; 187 volatile u32 intr_loc; 188 volatile u32 serr_loc; 189 volatile u32 serr_intr_enable; 190 volatile u32 slot1; 191 } __attribute__ ((packed)); 192 193 /* offsets to the controller registers based on the above structure layout */ 194 enum ctrl_offsets { 195 BASE_OFFSET = offsetof(struct ctrl_reg, base_offset), 196 SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1), 197 SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2), 198 SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config), 199 SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config), 200 MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl), 201 PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface), 202 CMD = offsetof(struct ctrl_reg, cmd), 203 CMD_STATUS = offsetof(struct ctrl_reg, cmd_status), 204 INTR_LOC = offsetof(struct ctrl_reg, intr_loc), 205 SERR_LOC = offsetof(struct ctrl_reg, serr_loc), 206 SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable), 207 SLOT1 = offsetof(struct ctrl_reg, slot1), 208 }; 209 210 static inline struct slot *get_slot(struct hotplug_slot *hotplug_slot) 211 { 212 return container_of(hotplug_slot, struct slot, hotplug_slot); 213 } 214 215 static inline struct slot *shpchp_find_slot(struct controller *ctrl, u8 device) 216 { 217 struct slot *slot; 218 219 list_for_each_entry(slot, &ctrl->slot_list, slot_list) { 220 if (slot->device == device) 221 return slot; 222 } 223 224 ctrl_err(ctrl, "Slot (device=0x%02x) not found\n", device); 225 return NULL; 226 } 227 228 static inline void amd_pogo_errata_save_misc_reg(struct slot *p_slot) 229 { 230 u32 pcix_misc2_temp; 231 232 /* save MiscII register */ 233 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp); 234 235 p_slot->ctrl->pcix_misc2_reg = pcix_misc2_temp; 236 237 /* clear SERR/PERR enable bits */ 238 pcix_misc2_temp &= ~SERRFATALENABLE_MASK; 239 pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK; 240 pcix_misc2_temp &= ~PERRFLOODENABLE_MASK; 241 pcix_misc2_temp &= ~PERRFATALENABLE_MASK; 242 pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK; 243 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp); 244 } 245 246 static inline void amd_pogo_errata_restore_misc_reg(struct slot *p_slot) 247 { 248 u32 pcix_misc2_temp; 249 u32 pcix_bridge_errors_reg; 250 u32 pcix_mem_base_reg; 251 u8 perr_set; 252 u8 rse_set; 253 254 /* write-one-to-clear Bridge_Errors[ PERR_OBSERVED ] */ 255 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, &pcix_bridge_errors_reg); 256 perr_set = pcix_bridge_errors_reg & PERR_OBSERVED_MASK; 257 if (perr_set) { 258 ctrl_dbg(p_slot->ctrl, 259 "Bridge_Errors[ PERR_OBSERVED = %08X] (W1C)\n", 260 perr_set); 261 262 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, perr_set); 263 } 264 265 /* write-one-to-clear Memory_Base_Limit[ RSE ] */ 266 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, &pcix_mem_base_reg); 267 rse_set = pcix_mem_base_reg & RSE_MASK; 268 if (rse_set) { 269 ctrl_dbg(p_slot->ctrl, "Memory_Base_Limit[ RSE ] (W1C)\n"); 270 271 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, rse_set); 272 } 273 /* restore MiscII register */ 274 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp); 275 276 if (p_slot->ctrl->pcix_misc2_reg & SERRFATALENABLE_MASK) 277 pcix_misc2_temp |= SERRFATALENABLE_MASK; 278 else 279 pcix_misc2_temp &= ~SERRFATALENABLE_MASK; 280 281 if (p_slot->ctrl->pcix_misc2_reg & SERRNONFATALENABLE_MASK) 282 pcix_misc2_temp |= SERRNONFATALENABLE_MASK; 283 else 284 pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK; 285 286 if (p_slot->ctrl->pcix_misc2_reg & PERRFLOODENABLE_MASK) 287 pcix_misc2_temp |= PERRFLOODENABLE_MASK; 288 else 289 pcix_misc2_temp &= ~PERRFLOODENABLE_MASK; 290 291 if (p_slot->ctrl->pcix_misc2_reg & PERRFATALENABLE_MASK) 292 pcix_misc2_temp |= PERRFATALENABLE_MASK; 293 else 294 pcix_misc2_temp &= ~PERRFATALENABLE_MASK; 295 296 if (p_slot->ctrl->pcix_misc2_reg & PERRNONFATALENABLE_MASK) 297 pcix_misc2_temp |= PERRNONFATALENABLE_MASK; 298 else 299 pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK; 300 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp); 301 } 302 303 struct hpc_ops { 304 int (*power_on_slot)(struct slot *slot); 305 int (*slot_enable)(struct slot *slot); 306 int (*slot_disable)(struct slot *slot); 307 int (*set_bus_speed_mode)(struct slot *slot, enum pci_bus_speed speed); 308 int (*get_power_status)(struct slot *slot, u8 *status); 309 int (*get_attention_status)(struct slot *slot, u8 *status); 310 int (*set_attention_status)(struct slot *slot, u8 status); 311 int (*get_latch_status)(struct slot *slot, u8 *status); 312 int (*get_adapter_status)(struct slot *slot, u8 *status); 313 int (*get_adapter_speed)(struct slot *slot, enum pci_bus_speed *speed); 314 int (*get_mode1_ECC_cap)(struct slot *slot, u8 *mode); 315 int (*get_prog_int)(struct slot *slot, u8 *prog_int); 316 int (*query_power_fault)(struct slot *slot); 317 void (*green_led_on)(struct slot *slot); 318 void (*green_led_off)(struct slot *slot); 319 void (*green_led_blink)(struct slot *slot); 320 void (*release_ctlr)(struct controller *ctrl); 321 int (*check_cmd_status)(struct controller *ctrl); 322 }; 323 324 #endif /* _SHPCHP_H */ 325