2 * PCI Express Hot Plug Controller Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
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.
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
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.
26 * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <asm/semaphore.h>
36 #include "pci_hotplug.h"
38 #define MY_NAME "pciehp"
40 extern int pciehp_poll_mode;
41 extern int pciehp_poll_time;
42 extern int pciehp_debug;
44 /*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
45 #define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
46 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
47 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
48 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
51 struct pci_func *next;
60 u32 base_length[0x06];
63 u32 config_space[0x20];
64 struct pci_resource *mem_head;
65 struct pci_resource *p_mem_head;
66 struct pci_resource *io_head;
67 struct pci_resource *bus_head;
68 struct pci_dev* pci_dev;
83 struct timer_list task_event;
85 struct controller *ctrl;
86 struct hpc_ops *hpc_ops;
87 struct hotplug_slot *hotplug_slot;
88 struct list_head slot_list;
92 struct pci_resource * next;
103 struct controller *next;
104 struct semaphore crit_sect; /* critical section semaphore */
105 void *hpc_ctlr_handle; /* HPC controller handle */
106 int num_slots; /* Number of slots on ctlr */
107 int slot_num_inc; /* 1 or -1 */
108 struct pci_resource *mem_head;
109 struct pci_resource *p_mem_head;
110 struct pci_resource *io_head;
111 struct pci_resource *bus_head;
112 struct pci_dev *pci_dev;
113 struct pci_bus *pci_bus;
114 struct event_info event_queue[10];
116 struct hpc_ops *hpc_ops;
117 wait_queue_head_t queue; /* sleep & wake process */
124 u8 slot_device_offset;
126 enum pci_bus_speed speed;
127 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
128 u8 slot_bus; /* Bus where the slots handled by this controller sit */
140 struct resource_lists {
141 struct pci_resource *mem_head;
142 struct pci_resource *p_mem_head;
143 struct pci_resource *io_head;
144 struct pci_resource *bus_head;
145 struct irq_mapping *irqs;
148 #define INT_BUTTON_IGNORE 0
149 #define INT_PRESENCE_ON 1
150 #define INT_PRESENCE_OFF 2
151 #define INT_SWITCH_CLOSE 3
152 #define INT_SWITCH_OPEN 4
153 #define INT_POWER_FAULT 5
154 #define INT_POWER_FAULT_CLEAR 6
155 #define INT_BUTTON_PRESS 7
156 #define INT_BUTTON_RELEASE 8
157 #define INT_BUTTON_CANCEL 9
159 #define STATIC_STATE 0
160 #define BLINKINGON_STATE 1
161 #define BLINKINGOFF_STATE 2
162 #define POWERON_STATE 3
163 #define POWEROFF_STATE 4
165 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
168 #define INTERLOCK_OPEN 0x00000002
169 #define ADD_NOT_SUPPORTED 0x00000003
170 #define CARD_FUNCTIONING 0x00000005
171 #define ADAPTER_NOT_SAME 0x00000006
172 #define NO_ADAPTER_PRESENT 0x00000009
173 #define NOT_ENOUGH_RESOURCES 0x0000000B
174 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
175 #define WRONG_BUS_FREQUENCY 0x0000000D
176 #define POWER_FAILURE 0x0000000E
178 #define REMOVE_NOT_SUPPORTED 0x00000003
180 #define DISABLE_CARD 1
185 #define msg_initialization_err "Initialization failure, error=%d\n"
186 #define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
187 #define msg_HPC_non_pcie "The PCI hot plug controller is not supported by this driver.\n"
188 #define msg_HPC_not_supported "This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
189 #define msg_unable_to_save "Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
190 #define msg_button_on "PCI slot #%d - powering on due to button press.\n"
191 #define msg_button_off "PCI slot #%d - powering off due to button press.\n"
192 #define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
193 #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
195 /* sysfs function for the hotplug controller info */
196 extern void pciehp_create_ctrl_files (struct controller *ctrl);
198 /* controller functions */
199 extern int pciehprm_find_available_resources (struct controller *ctrl);
200 extern int pciehp_event_start_thread (void);
201 extern void pciehp_event_stop_thread (void);
202 extern struct pci_func *pciehp_slot_create (unsigned char busnumber);
203 extern struct pci_func *pciehp_slot_find (unsigned char bus, unsigned char device, unsigned char index);
204 extern int pciehp_enable_slot (struct slot *slot);
205 extern int pciehp_disable_slot (struct slot *slot);
207 extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id);
208 extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id);
209 extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id);
210 extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id);
211 /* extern void long_delay (int delay); */
213 /* resource functions */
214 extern int pciehp_resource_sort_and_combine (struct pci_resource **head);
217 extern int pciehp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
218 /*extern int pciehp_get_bus_dev (struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
219 extern int pciehp_save_config (struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
220 extern int pciehp_save_used_resources (struct controller *ctrl, struct pci_func * func, int flag);
221 extern int pciehp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot);
222 extern void pciehp_destroy_board_resources (struct pci_func * func);
223 extern int pciehp_return_board_resources (struct pci_func * func, struct resource_lists * resources);
224 extern void pciehp_destroy_resource_list (struct resource_lists * resources);
225 extern int pciehp_configure_device (struct controller* ctrl, struct pci_func* func);
226 extern int pciehp_unconfigure_device (struct pci_func* func);
229 /* Global variables */
230 extern struct controller *pciehp_ctrl_list;
231 extern struct pci_func *pciehp_slot_list[256];
233 /* Inline functions */
235 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
237 struct slot *p_slot, *tmp_slot = NULL;
241 dbg("p_slot = %p\n", p_slot);
243 while (p_slot && (p_slot->device != device)) {
245 p_slot = p_slot->next;
246 dbg("In while loop, p_slot = %p\n", p_slot);
248 if (p_slot == NULL) {
249 err("ERROR: pciehp_find_slot device=0x%x\n", device);
256 static inline int wait_for_ctrl_irq(struct controller *ctrl)
260 DECLARE_WAITQUEUE(wait, current);
262 dbg("%s : start\n", __FUNCTION__);
263 add_wait_queue(&ctrl->queue, &wait);
264 set_current_state(TASK_INTERRUPTIBLE);
265 if (!pciehp_poll_mode) {
266 /* Sleep for up to 1 second */
267 schedule_timeout(1*HZ);
269 schedule_timeout(2.5*HZ);
271 set_current_state(TASK_RUNNING);
272 remove_wait_queue(&ctrl->queue, &wait);
273 if (signal_pending(current))
276 dbg("%s : end\n", __FUNCTION__);
280 /* Puts node back in the resource list pointed to by head */
281 static inline void return_resource(struct pci_resource **head, struct pci_resource *node)
289 #define SLOT_NAME_SIZE 10
291 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
293 snprintf(buffer, buffer_size, "%d", slot->number);
302 typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);
304 int pcie_init(struct controller *ctrl, struct pci_dev *pdev,
305 php_intr_callback_t attention_button_callback,
306 php_intr_callback_t switch_change_callback,
307 php_intr_callback_t presence_change_callback,
308 php_intr_callback_t power_fault_callback);
311 /* This has no meaning for PCI Express, as there is only 1 slot per port */
312 int pcie_get_ctlr_slot_config(struct controller *ctrl,
314 int *first_device_num,
315 int *physical_slot_num,
320 int (*power_on_slot) (struct slot *slot);
321 int (*power_off_slot) (struct slot *slot);
322 int (*get_power_status) (struct slot *slot, u8 *status);
323 int (*get_attention_status) (struct slot *slot, u8 *status);
324 int (*set_attention_status) (struct slot *slot, u8 status);
325 int (*get_latch_status) (struct slot *slot, u8 *status);
326 int (*get_adapter_status) (struct slot *slot, u8 *status);
328 int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
329 int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
331 int (*get_max_lnk_width) (struct slot *slot, enum pcie_link_width *value);
332 int (*get_cur_lnk_width) (struct slot *slot, enum pcie_link_width *value);
334 int (*query_power_fault) (struct slot *slot);
335 void (*green_led_on) (struct slot *slot);
336 void (*green_led_off) (struct slot *slot);
337 void (*green_led_blink) (struct slot *slot);
338 void (*release_ctlr) (struct controller *ctrl);
339 int (*check_lnk_status) (struct controller *ctrl);
342 #endif /* _PCIEHP_H */