drivers/pci/hotplug/shpchp.h

   1 /*
   2  * Standard Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   6  * Copyright (C) 2001 IBM
   7  * Copyright (C) 2003-2004 Intel Corporation
   8  *
   9  * All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  19  * NON INFRINGEMENT.  See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
  27  *
  28  */
  29 #ifndef _SHPCHP_H
  30 #define _SHPCHP_H
  31
  32 #include <linux/types.h>
  33 #include <linux/pci.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>        /* signal_pending(), struct timer_list */
  36
  37 #include "pci_hotplug.h"
  38
  39 #if !defined(MODULE)
  40         #define MY_NAME "shpchp"
  41 #else
  42         #define MY_NAME THIS_MODULE->name
  43 #endif
  44
  45 extern int shpchp_poll_mode;
  46 extern int shpchp_poll_time;
  47 extern int shpchp_debug;
  48
  49 /*#define dbg(format, arg...) do { if (shpchp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
  50 #define dbg(format, arg...) do { if (shpchp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
  51 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
  52 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
  53 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
  54
  55 #define SLOT_MAGIC      0x67267321
  56 struct slot {
  57         u32 magic;
  58         struct slot *next;
  59         u8 bus;
  60         u8 device;
  61         u16 status;
  62         u32 number;
  63         u8 is_a_board;
  64         u8 state;
  65         u8 presence_save;
  66         u8 pwr_save;
  67         struct timer_list task_event;
  68         u8 hp_slot;
  69         struct controller *ctrl;
  70         struct hpc_ops *hpc_ops;
  71         struct hotplug_slot *hotplug_slot;
  72         struct list_head        slot_list;
  73 };
  74
  75 struct event_info {
  76         u32 event_type;
  77         u8 hp_slot;
  78 };
  79
  80 struct controller {
  81         struct controller *next;
  82         struct semaphore crit_sect;     /* critical section semaphore */
  83         struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */
  84         int num_slots;                  /* Number of slots on ctlr */
  85         int slot_num_inc;               /* 1 or -1 */
  86         struct pci_dev *pci_dev;
  87         struct pci_bus *pci_bus;
  88         struct event_info event_queue[10];
  89         struct slot *slot;
  90         struct hpc_ops *hpc_ops;
  91         wait_queue_head_t queue;        /* sleep & wake process */
  92         u8 next_event;
  93         u8 bus;
  94         u8 device;
  95         u8 function;
  96         u8 slot_device_offset;
  97         u8 add_support;
  98         enum pci_bus_speed speed;
  99         u32 first_slot;         /* First physical slot number */
 100         u8 slot_bus;            /* Bus where the slots handled by this controller sit */
 101         u32 cap_offset;
 102         unsigned long mmio_base;
 103         unsigned long mmio_size;
 104 };
 105
 106 struct hotplug_params {
 107         u8      cache_line_size;
 108         u8      latency_timer;
 109         u8      enable_serr;
 110         u8      enable_perr;
 111 };
 112
 113 /* Define AMD SHPC ID  */
 114 #define PCI_DEVICE_ID_AMD_GOLAM_7450    0x7450
 115
 116 #define INT_BUTTON_IGNORE               0
 117 #define INT_PRESENCE_ON                 1
 118 #define INT_PRESENCE_OFF                2
 119 #define INT_SWITCH_CLOSE                3
 120 #define INT_SWITCH_OPEN                 4
 121 #define INT_POWER_FAULT                 5
 122 #define INT_POWER_FAULT_CLEAR           6
 123 #define INT_BUTTON_PRESS                7
 124 #define INT_BUTTON_RELEASE              8
 125 #define INT_BUTTON_CANCEL               9
 126
 127 #define STATIC_STATE                    0
 128 #define BLINKINGON_STATE                1
 129 #define BLINKINGOFF_STATE               2
 130 #define POWERON_STATE                   3
 131 #define POWEROFF_STATE                  4
 132
 133 #define PCI_TO_PCI_BRIDGE_CLASS         0x00060400
 134
 135 /* Error messages */
 136 #define INTERLOCK_OPEN                  0x00000002
 137 #define ADD_NOT_SUPPORTED               0x00000003
 138 #define CARD_FUNCTIONING                0x00000005
 139 #define ADAPTER_NOT_SAME                0x00000006
 140 #define NO_ADAPTER_PRESENT              0x00000009
 141 #define NOT_ENOUGH_RESOURCES            0x0000000B
 142 #define DEVICE_TYPE_NOT_SUPPORTED       0x0000000C
 143 #define WRONG_BUS_FREQUENCY             0x0000000D
 144 #define POWER_FAILURE                   0x0000000E
 145
 146 #define REMOVE_NOT_SUPPORTED            0x00000003
 147
 148 #define DISABLE_CARD                    1
 149
 150 /*
 151  * error Messages
 152  */
 153 #define msg_initialization_err  "Initialization failure, error=%d\n"
 154 #define msg_button_on           "PCI slot #%d - powering on due to button press.\n"
 155 #define msg_button_off          "PCI slot #%d - powering off due to button press.\n"
 156 #define msg_button_cancel       "PCI slot #%d - action canceled due to button press.\n"
 157
 158 /* sysfs functions for the hotplug controller info */
 159 extern void shpchp_create_ctrl_files    (struct controller *ctrl);
 160
 161 /* controller functions */
 162 extern int      shpchp_event_start_thread(void);
 163 extern void     shpchp_event_stop_thread(void);
 164 extern int      shpchp_enable_slot(struct slot *slot);
 165 extern int      shpchp_disable_slot(struct slot *slot);
 166
 167 extern u8       shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
 168 extern u8       shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
 169 extern u8       shpchp_handle_presence_change(u8 hp_slot, void *inst_id);
 170 extern u8       shpchp_handle_power_fault(u8 hp_slot, void *inst_id);
 171
 172 /* pci functions */
 173 extern int      shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
 174 extern int      shpchp_configure_device(struct slot *p_slot);
 175 extern int      shpchp_unconfigure_device(struct slot *p_slot);
 176 extern void     get_hp_hw_control_from_firmware(struct pci_dev *dev);
 177 extern void     get_hp_params_from_firmware(struct pci_dev *dev,
 178                 struct hotplug_params *hpp);
 179 extern int      shpchprm_get_physical_slot_number(struct controller *ctrl,
 180                 u32 *sun, u8 busnum, u8 devnum);
 181 extern void     shpchp_remove_ctrl_files(struct controller *ctrl);
 182
 183
 184 /* Global variables */
 185 extern struct controller *shpchp_ctrl_list;
 186
 187 struct ctrl_reg {
 188         volatile u32 base_offset;
 189         volatile u32 slot_avail1;
 190         volatile u32 slot_avail2;
 191         volatile u32 slot_config;
 192         volatile u16 sec_bus_config;
 193         volatile u8  msi_ctrl;
 194         volatile u8  prog_interface;
 195         volatile u16 cmd;
 196         volatile u16 cmd_status;
 197         volatile u32 intr_loc;
 198         volatile u32 serr_loc;
 199         volatile u32 serr_intr_enable;
 200         volatile u32 slot1;
 201         volatile u32 slot2;
 202         volatile u32 slot3;
 203         volatile u32 slot4;
 204         volatile u32 slot5;
 205         volatile u32 slot6;
 206         volatile u32 slot7;
 207         volatile u32 slot8;
 208         volatile u32 slot9;
 209         volatile u32 slot10;
 210         volatile u32 slot11;
 211         volatile u32 slot12;
 212 } __attribute__ ((packed));
 213
 214 /* offsets to the controller registers based on the above structure layout */
 215 enum ctrl_offsets {
 216         BASE_OFFSET =   offsetof(struct ctrl_reg, base_offset),
 217         SLOT_AVAIL1 =   offsetof(struct ctrl_reg, slot_avail1),
 218         SLOT_AVAIL2     =       offsetof(struct ctrl_reg, slot_avail2),
 219         SLOT_CONFIG =   offsetof(struct ctrl_reg, slot_config),
 220         SEC_BUS_CONFIG =        offsetof(struct ctrl_reg, sec_bus_config),
 221         MSI_CTRL        =       offsetof(struct ctrl_reg, msi_ctrl),
 222         PROG_INTERFACE =        offsetof(struct ctrl_reg, prog_interface),
 223         CMD             =       offsetof(struct ctrl_reg, cmd),
 224         CMD_STATUS      =       offsetof(struct ctrl_reg, cmd_status),
 225         INTR_LOC        =       offsetof(struct ctrl_reg, intr_loc),
 226         SERR_LOC        =       offsetof(struct ctrl_reg, serr_loc),
 227         SERR_INTR_ENABLE =      offsetof(struct ctrl_reg, serr_intr_enable),
 228         SLOT1 =         offsetof(struct ctrl_reg, slot1),
 229         SLOT2 =         offsetof(struct ctrl_reg, slot2),
 230         SLOT3 =         offsetof(struct ctrl_reg, slot3),
 231         SLOT4 =         offsetof(struct ctrl_reg, slot4),
 232         SLOT5 =         offsetof(struct ctrl_reg, slot5),
 233         SLOT6 =         offsetof(struct ctrl_reg, slot6),
 234         SLOT7 =         offsetof(struct ctrl_reg, slot7),
 235         SLOT8 =         offsetof(struct ctrl_reg, slot8),
 236         SLOT9 =         offsetof(struct ctrl_reg, slot9),
 237         SLOT10 =        offsetof(struct ctrl_reg, slot10),
 238         SLOT11 =        offsetof(struct ctrl_reg, slot11),
 239         SLOT12 =        offsetof(struct ctrl_reg, slot12),
 240 };
 241 typedef u8(*php_intr_callback_t) (u8 hp_slot, void *instance_id);
 242 struct php_ctlr_state_s {
 243         struct php_ctlr_state_s *pnext;
 244         struct pci_dev *pci_dev;
 245         unsigned int irq;
 246         unsigned long flags;    /* spinlock's */
 247         u32 slot_device_offset;
 248         u32 num_slots;
 249         struct timer_list       int_poll_timer; /* Added for poll event */
 250         php_intr_callback_t attention_button_callback;
 251         php_intr_callback_t switch_change_callback;
 252         php_intr_callback_t presence_change_callback;
 253         php_intr_callback_t power_fault_callback;
 254         void *callback_instance_id;
 255         void __iomem *creg;                     /* Ptr to controller register space */
 256 };
 257 /* Inline functions */
 258
 259
 260 /* Inline functions to check the sanity of a pointer that is passed to us */
 261 static inline int slot_paranoia_check (struct slot *slot, const char *function)
 262 {
 263         if (!slot) {
 264                 dbg("%s - slot == NULL", function);
 265                 return -1;
 266         }
 267         if (slot->magic != SLOT_MAGIC) {
 268                 dbg("%s - bad magic number for slot", function);
 269                 return -1;
 270         }
 271         if (!slot->hotplug_slot) {
 272                 dbg("%s - slot->hotplug_slot == NULL!", function);
 273                 return -1;
 274         }
 275         return 0;
 276 }
 277
 278 static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
 279 {
 280         struct slot *slot;
 281
 282         if (!hotplug_slot) {
 283                 dbg("%s - hotplug_slot == NULL\n", function);
 284                 return NULL;
 285         }
 286
 287         slot = (struct slot *)hotplug_slot->private;
 288         if (slot_paranoia_check (slot, function))
 289                 return NULL;
 290         return slot;
 291 }
 292
 293 static inline struct slot *shpchp_find_slot (struct controller *ctrl, u8 device)
 294 {
 295         struct slot *p_slot, *tmp_slot = NULL;
 296
 297         if (!ctrl)
 298                 return NULL;
 299
 300         p_slot = ctrl->slot;
 301
 302         while (p_slot && (p_slot->device != device)) {
 303                 tmp_slot = p_slot;
 304                 p_slot = p_slot->next;
 305         }
 306         if (p_slot == NULL) {
 307                 err("ERROR: shpchp_find_slot device=0x%x\n", device);
 308                 p_slot = tmp_slot;
 309         }
 310
 311         return (p_slot);
 312 }
 313
 314 static inline int wait_for_ctrl_irq (struct controller *ctrl)
 315 {
 316     DECLARE_WAITQUEUE(wait, current);
 317         int retval = 0;
 318
 319         add_wait_queue(&ctrl->queue, &wait);
 320
 321         if (!shpchp_poll_mode) {
 322                 /* Sleep for up to 1 second */
 323                 msleep_interruptible(1000);
 324         } else {
 325                 /* Sleep for up to 2 seconds */
 326                 msleep_interruptible(2000);
 327         }
 328         remove_wait_queue(&ctrl->queue, &wait);
 329         if (signal_pending(current))
 330                 retval =  -EINTR;
 331
 332         return retval;
 333 }
 334
 335 #define SLOT_NAME_SIZE 10
 336
 337 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
 338 {
 339         snprintf(buffer, buffer_size, "%04d_%04d", slot->bus, slot->number);
 340 }
 341
 342 enum php_ctlr_type {
 343         PCI,
 344         ISA,
 345         ACPI
 346 };
 347
 348 int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
 349
 350 int shpc_get_ctlr_slot_config( struct controller *ctrl,
 351                 int *num_ctlr_slots,
 352                 int *first_device_num,
 353                 int *physical_slot_num,
 354                 int *updown,
 355                 int *flags);
 356
 357 struct hpc_ops {
 358         int     (*power_on_slot )               (struct slot *slot);
 359         int     (*slot_enable )                 (struct slot *slot);
 360         int     (*slot_disable )                (struct slot *slot);
 361         int     (*set_bus_speed_mode)   (struct slot *slot, enum pci_bus_speed speed);
 362         int     (*get_power_status)             (struct slot *slot, u8 *status);
 363         int     (*get_attention_status) (struct slot *slot, u8 *status);
 364         int     (*set_attention_status) (struct slot *slot, u8 status);
 365         int     (*get_latch_status)             (struct slot *slot, u8 *status);
 366         int     (*get_adapter_status)   (struct slot *slot, u8 *status);
 367
 368         int     (*get_max_bus_speed)    (struct slot *slot, enum pci_bus_speed *speed);
 369         int     (*get_cur_bus_speed)    (struct slot *slot, enum pci_bus_speed *speed);
 370         int     (*get_adapter_speed)    (struct slot *slot, enum pci_bus_speed *speed);
 371         int     (*get_mode1_ECC_cap)    (struct slot *slot, u8 *mode);
 372         int     (*get_prog_int)                 (struct slot *slot, u8 *prog_int);
 373
 374         int     (*query_power_fault)    (struct slot *slot);
 375         void    (*green_led_on)         (struct slot *slot);
 376         void    (*green_led_off)        (struct slot *slot);
 377         void    (*green_led_blink)      (struct slot *slot);
 378         void    (*release_ctlr)         (struct controller *ctrl);
 379         int (*check_cmd_status)         (struct controller *ctrl);
 380 };
 381
 382 #endif                          /* _SHPCHP_H */