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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/init.h>#include <linux/module.h>#include <linux/slab.h>#include <linux/pci.h>#include <linux/interrupt.h>#include <linux/delay.h>#include <linux/wait.h>#include "../pci.h"#include <asm/pci_x86.h> /* for struct irq_routing_table */#include <asm/io_apic.h>#include "ibmphp.h"
#define attn_on(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)#define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)#define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)#define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)#define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
#define DRIVER_VERSION "0.6"#define DRIVER_DESC "IBM Hot Plug PCI Controller Driver"
int ibmphp_debug;
static bool debug;module_param(debug, bool, S_IRUGO | S_IWUSR);MODULE_PARM_DESC(debug, "Debugging mode enabled or not");MODULE_LICENSE("GPL");MODULE_DESCRIPTION(DRIVER_DESC);
struct pci_bus *ibmphp_pci_bus;static int max_slots;
static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS * tables don't provide default info for empty slots */
static int init_flag;
static inline int get_cur_bus_info(struct slot **sl){ int rc = 1; struct slot *slot_cur = *sl;
debug("options = %x\n", slot_cur->ctrl->options); debug("revision = %x\n", slot_cur->ctrl->revision);
if (READ_BUS_STATUS(slot_cur->ctrl)) rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
if (rc) return rc;
slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus); if (READ_BUS_MODE(slot_cur->ctrl)) slot_cur->bus_on->current_bus_mode = CURRENT_BUS_MODE(slot_cur->busstatus); else slot_cur->bus_on->current_bus_mode = 0xFF;
debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n", slot_cur->busstatus, slot_cur->bus_on->current_speed, slot_cur->bus_on->current_bus_mode);
*sl = slot_cur; return 0;}
static inline int slot_update(struct slot **sl){ int rc; rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL); if (rc) return rc; if (!init_flag) rc = get_cur_bus_info(sl); return rc;}
static int __init get_max_slots(void){ struct slot *slot_cur; u8 slot_count = 0;
list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { /* sometimes the hot-pluggable slots start with 4 (not always from 1) */ slot_count = max(slot_count, slot_cur->number); } return slot_count;}
/* This routine will put the correct slot->device information per slot. It's * called from initialization of the slot structures. It will also assign * interrupt numbers per each slot. * Parameters: struct slot * Returns 0 or errors */int ibmphp_init_devno(struct slot **cur_slot){ struct irq_routing_table *rtable; int len; int loop; int i;
rtable = pcibios_get_irq_routing_table(); if (!rtable) { err("no BIOS routing table...\n"); return -ENOMEM; }
len = (rtable->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
if (!len) { kfree(rtable); return -1; } for (loop = 0; loop < len; loop++) { if ((*cur_slot)->number == rtable->slots[loop].slot && (*cur_slot)->bus == rtable->slots[loop].bus) { (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn); for (i = 0; i < 4; i++) (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus, (int) (*cur_slot)->device, i);
debug("(*cur_slot)->irq[0] = %x\n", (*cur_slot)->irq[0]); debug("(*cur_slot)->irq[1] = %x\n", (*cur_slot)->irq[1]); debug("(*cur_slot)->irq[2] = %x\n", (*cur_slot)->irq[2]); debug("(*cur_slot)->irq[3] = %x\n", (*cur_slot)->irq[3]);
debug("rtable->exclusive_irqs = %x\n", rtable->exclusive_irqs); debug("rtable->slots[loop].irq[0].bitmap = %x\n", rtable->slots[loop].irq[0].bitmap); debug("rtable->slots[loop].irq[1].bitmap = %x\n", rtable->slots[loop].irq[1].bitmap); debug("rtable->slots[loop].irq[2].bitmap = %x\n", rtable->slots[loop].irq[2].bitmap); debug("rtable->slots[loop].irq[3].bitmap = %x\n", rtable->slots[loop].irq[3].bitmap);
debug("rtable->slots[loop].irq[0].link = %x\n", rtable->slots[loop].irq[0].link); debug("rtable->slots[loop].irq[1].link = %x\n", rtable->slots[loop].irq[1].link); debug("rtable->slots[loop].irq[2].link = %x\n", rtable->slots[loop].irq[2].link); debug("rtable->slots[loop].irq[3].link = %x\n", rtable->slots[loop].irq[3].link); debug("end of init_devno\n"); kfree(rtable); return 0; } }
kfree(rtable); return -1;}
static inline int power_on(struct slot *slot_cur){ u8 cmd = HPC_SLOT_ON; int retval;
retval = ibmphp_hpc_writeslot(slot_cur, cmd); if (retval) { err("power on failed\n"); return retval; } if (CTLR_RESULT(slot_cur->ctrl->status)) { err("command not completed successfully in power_on\n"); return -EIO; } msleep(3000); /* For ServeRAID cards, and some 66 PCI */ return 0;}
static inline int power_off(struct slot *slot_cur){ u8 cmd = HPC_SLOT_OFF; int retval;
retval = ibmphp_hpc_writeslot(slot_cur, cmd); if (retval) { err("power off failed\n"); return retval; } if (CTLR_RESULT(slot_cur->ctrl->status)) { err("command not completed successfully in power_off\n"); retval = -EIO; } return retval;}
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value){ int rc = 0; struct slot *pslot; u8 cmd = 0x00; /* avoid compiler warning */
debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n", (ulong) hotplug_slot, value); ibmphp_lock_operations();
if (hotplug_slot) { switch (value) { case HPC_SLOT_ATTN_OFF: cmd = HPC_SLOT_ATTNOFF; break; case HPC_SLOT_ATTN_ON: cmd = HPC_SLOT_ATTNON; break; case HPC_SLOT_ATTN_BLINK: cmd = HPC_SLOT_BLINKLED; break; default: rc = -ENODEV; err("set_attention_status - Error : invalid input [%x]\n", value); break; } if (rc == 0) { pslot = to_slot(hotplug_slot); rc = ibmphp_hpc_writeslot(pslot, cmd); } } else rc = -ENODEV;
ibmphp_unlock_operations();
debug("set_attention_status - Exit rc[%d]\n", rc); return rc;}
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value){ int rc = -ENODEV; struct slot *pslot; struct slot myslot;
debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", (ulong) hotplug_slot, (ulong) value);
ibmphp_lock_operations(); if (hotplug_slot) { pslot = to_slot(hotplug_slot); memcpy(&myslot, pslot, sizeof(struct slot)); rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, &myslot.status); if (!rc) rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS, &myslot.ext_status); if (!rc) *value = SLOT_ATTN(myslot.status, myslot.ext_status); }
ibmphp_unlock_operations(); debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value); return rc;}
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value){ int rc = -ENODEV; struct slot *pslot; struct slot myslot;
debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { pslot = to_slot(hotplug_slot); memcpy(&myslot, pslot, sizeof(struct slot)); rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, &myslot.status); if (!rc) *value = SLOT_LATCH(myslot.status); }
ibmphp_unlock_operations(); debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n", rc, rc, *value); return rc;}
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value){ int rc = -ENODEV; struct slot *pslot; struct slot myslot;
debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { pslot = to_slot(hotplug_slot); memcpy(&myslot, pslot, sizeof(struct slot)); rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, &myslot.status); if (!rc) *value = SLOT_PWRGD(myslot.status); }
ibmphp_unlock_operations(); debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n", rc, rc, *value); return rc;}
static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value){ int rc = -ENODEV; struct slot *pslot; u8 present; struct slot myslot;
debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n", (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { pslot = to_slot(hotplug_slot); memcpy(&myslot, pslot, sizeof(struct slot)); rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, &myslot.status); if (!rc) { present = SLOT_PRESENT(myslot.status); if (present == HPC_SLOT_EMPTY) *value = 0; else *value = 1; } }
ibmphp_unlock_operations(); debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value); return rc;}
static int get_max_bus_speed(struct slot *slot){ int rc = 0; u8 mode = 0; enum pci_bus_speed speed; struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus;
debug("%s - Entry slot[%p]\n", __func__, slot);
ibmphp_lock_operations(); mode = slot->supported_bus_mode; speed = slot->supported_speed; ibmphp_unlock_operations();
switch (speed) { case BUS_SPEED_33: break; case BUS_SPEED_66: if (mode == BUS_MODE_PCIX) speed += 0x01; break; case BUS_SPEED_100: case BUS_SPEED_133: speed += 0x01; break; default: /* Note (will need to change): there would be soon 256, 512 also */ rc = -ENODEV; }
if (!rc) bus->max_bus_speed = speed;
debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed); return rc;}
/**************************************************************************** * This routine will initialize the ops data structure used in the validate * function. It will also power off empty slots that are powered on since BIOS * leaves those on, albeit disconnected ****************************************************************************/static int __init init_ops(void){ struct slot *slot_cur; int retval; int rc;
list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { debug("BEFORE GETTING SLOT STATUS, slot # %x\n", slot_cur->number); if (slot_cur->ctrl->revision == 0xFF) if (get_ctrl_revision(slot_cur, &slot_cur->ctrl->revision)) return -1;
if (slot_cur->bus_on->current_speed == 0xFF) if (get_cur_bus_info(&slot_cur)) return -1; get_max_bus_speed(slot_cur);
if (slot_cur->ctrl->options == 0xFF) if (get_hpc_options(slot_cur, &slot_cur->ctrl->options)) return -1;
retval = slot_update(&slot_cur); if (retval) return retval;
debug("status = %x\n", slot_cur->status); debug("ext_status = %x\n", slot_cur->ext_status); debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status)); debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status)); debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
if ((SLOT_PWRGD(slot_cur->status)) && !(SLOT_PRESENT(slot_cur->status)) && !(SLOT_LATCH(slot_cur->status))) { debug("BEFORE POWER OFF COMMAND\n"); rc = power_off(slot_cur); if (rc) return rc;
/* retval = slot_update(&slot_cur); * if (retval) * return retval; * ibmphp_update_slot_info(slot_cur); */ } } init_flag = 0; return 0;}
/* This operation will check whether the slot is within the bounds and * the operation is valid to perform on that slot * Parameters: slot, operation * Returns: 0 or error codes */static int validate(struct slot *slot_cur, int opn){ int number; int retval;
if (!slot_cur) return -ENODEV; number = slot_cur->number; if ((number > max_slots) || (number < 0)) return -EBADSLT; debug("slot_number in validate is %d\n", slot_cur->number);
retval = slot_update(&slot_cur); if (retval) return retval;
switch (opn) { case ENABLE: if (!(SLOT_PWRGD(slot_cur->status)) && (SLOT_PRESENT(slot_cur->status)) && !(SLOT_LATCH(slot_cur->status))) return 0; break; case DISABLE: if ((SLOT_PWRGD(slot_cur->status)) && (SLOT_PRESENT(slot_cur->status)) && !(SLOT_LATCH(slot_cur->status))) return 0; break; default: break; } err("validate failed....\n"); return -EINVAL;}
/**************************************************************************** * This routine is for updating the data structures in the hotplug core * Parameters: struct slot * Returns: 0 or error ****************************************************************************/int ibmphp_update_slot_info(struct slot *slot_cur){ struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus; u8 bus_speed; u8 mode;
bus_speed = slot_cur->bus_on->current_speed; mode = slot_cur->bus_on->current_bus_mode;
switch (bus_speed) { case BUS_SPEED_33: break; case BUS_SPEED_66: if (mode == BUS_MODE_PCIX) bus_speed += 0x01; else if (mode == BUS_MODE_PCI) ; else bus_speed = PCI_SPEED_UNKNOWN; break; case BUS_SPEED_100: case BUS_SPEED_133: bus_speed += 0x01; break; default: bus_speed = PCI_SPEED_UNKNOWN; }
bus->cur_bus_speed = bus_speed; // To do: bus_names
return 0;}
/****************************************************************************** * This function will return the pci_func, given bus and devfunc, or NULL. It * is called from visit routines ******************************************************************************/
static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function){ struct pci_func *func_cur; struct slot *slot_cur; list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) { if (slot_cur->func) { func_cur = slot_cur->func; while (func_cur) { if ((func_cur->busno == busno) && (func_cur->device == device) && (func_cur->function == function)) return func_cur; func_cur = func_cur->next; } } } return NULL;}
/************************************************************* * This routine frees up memory used by struct slot, including * the pointers to pci_func, bus, hotplug_slot, controller, * and deregistering from the hotplug core *************************************************************/static void free_slots(void){ struct slot *slot_cur, *next;
debug("%s -- enter\n", __func__);
list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head, ibm_slot_list) { pci_hp_del(&slot_cur->hotplug_slot); slot_cur->ctrl = NULL; slot_cur->bus_on = NULL;
/* * We don't want to actually remove the resources, * since ibmphp_free_resources() will do just that. */ ibmphp_unconfigure_card(&slot_cur, -1);
pci_hp_destroy(&slot_cur->hotplug_slot); kfree(slot_cur); } debug("%s -- exit\n", __func__);}
static void ibm_unconfigure_device(struct pci_func *func){ struct pci_dev *temp; u8 j;
debug("inside %s\n", __func__); debug("func->device = %x, func->function = %x\n", func->device, func->function); debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
pci_lock_rescan_remove();
for (j = 0; j < 0x08; j++) { temp = pci_get_domain_bus_and_slot(0, func->busno, (func->device << 3) | j); if (temp) { pci_stop_and_remove_bus_device(temp); pci_dev_put(temp); } }
pci_dev_put(func->dev);
pci_unlock_rescan_remove();}
/* * The following function is to fix kernel bug regarding * getting bus entries, here we manually add those primary * bus entries to kernel bus structure whenever apply */static u8 bus_structure_fixup(u8 busno){ struct pci_bus *bus, *b; struct pci_dev *dev; u16 l;
if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno))) return 1;
bus = kmalloc_obj(*bus); if (!bus) return 1;
dev = kmalloc_obj(*dev); if (!dev) { kfree(bus); return 1; }
bus->number = busno; bus->ops = ibmphp_pci_bus->ops; dev->bus = bus; for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) { if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) && (l != 0x0000) && (l != 0xffff)) { debug("%s - Inside bus_structure_fixup()\n", __func__); b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL); if (!b) continue;
pci_bus_add_devices(b); break; } }
kfree(dev); kfree(bus);
return 0;}
static int ibm_configure_device(struct pci_func *func){ struct pci_bus *child; int num; int flag = 0; /* this is to make sure we don't double scan the bus, for bridged devices primarily */
pci_lock_rescan_remove();
if (!(bus_structure_fixup(func->busno))) flag = 1; if (func->dev == NULL) func->dev = pci_get_domain_bus_and_slot(0, func->busno, PCI_DEVFN(func->device, func->function));
if (func->dev == NULL) { struct pci_bus *bus = pci_find_bus(0, func->busno); if (!bus) goto out;
num = pci_scan_slot(bus, PCI_DEVFN(func->device, func->function)); if (num) pci_bus_add_devices(bus);
func->dev = pci_get_domain_bus_and_slot(0, func->busno, PCI_DEVFN(func->device, func->function)); if (func->dev == NULL) { err("ERROR... : pci_dev still NULL\n"); goto out; } } if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) { pci_hp_add_bridge(func->dev); child = func->dev->subordinate; if (child) pci_bus_add_devices(child); }
out: pci_unlock_rescan_remove(); return 0;}
/******************************************************* * Returns whether the bus is empty or not *******************************************************/static int is_bus_empty(struct slot *slot_cur){ int rc; struct slot *tmp_slot; u8 i = slot_cur->bus_on->slot_min;
while (i <= slot_cur->bus_on->slot_max) { if (i == slot_cur->number) { i++; continue; } tmp_slot = ibmphp_get_slot_from_physical_num(i); if (!tmp_slot) return 0; rc = slot_update(&tmp_slot); if (rc) return 0; if (SLOT_PRESENT(tmp_slot->status) && SLOT_PWRGD(tmp_slot->status)) return 0; i++; } return 1;}
/*********************************************************** * If the HPC permits and the bus currently empty, tries to set the * bus speed and mode at the maximum card and bus capability * Parameters: slot * Returns: bus is set (0) or error code ***********************************************************/static int set_bus(struct slot *slot_cur){ int rc; u8 speed; u8 cmd = 0x0; int retval; static const struct pci_device_id ciobx[] = { { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) }, { }, };
debug("%s - entry slot # %d\n", __func__, slot_cur->number); if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) { rc = slot_update(&slot_cur); if (rc) return rc; speed = SLOT_SPEED(slot_cur->ext_status); debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed); switch (speed) { case HPC_SLOT_SPEED_33: cmd = HPC_BUS_33CONVMODE; break; case HPC_SLOT_SPEED_66: if (SLOT_PCIX(slot_cur->ext_status)) { if ((slot_cur->supported_speed >= BUS_SPEED_66) && (slot_cur->supported_bus_mode == BUS_MODE_PCIX)) cmd = HPC_BUS_66PCIXMODE; else if (!SLOT_BUS_MODE(slot_cur->ext_status)) /* if max slot/bus capability is 66 pci and there's no bus mode mismatch, then the adapter supports 66 pci */ cmd = HPC_BUS_66CONVMODE; else cmd = HPC_BUS_33CONVMODE; } else { if (slot_cur->supported_speed >= BUS_SPEED_66) cmd = HPC_BUS_66CONVMODE; else cmd = HPC_BUS_33CONVMODE; } break; case HPC_SLOT_SPEED_133: switch (slot_cur->supported_speed) { case BUS_SPEED_33: cmd = HPC_BUS_33CONVMODE; break; case BUS_SPEED_66: if (slot_cur->supported_bus_mode == BUS_MODE_PCIX) cmd = HPC_BUS_66PCIXMODE; else cmd = HPC_BUS_66CONVMODE; break; case BUS_SPEED_100: cmd = HPC_BUS_100PCIXMODE; break; case BUS_SPEED_133: /* This is to take care of the bug in CIOBX chip */ if (pci_dev_present(ciobx)) ibmphp_hpc_writeslot(slot_cur, HPC_BUS_100PCIXMODE); cmd = HPC_BUS_133PCIXMODE; break; default: err("Wrong bus speed\n"); return -ENODEV; } break; default: err("wrong slot speed\n"); return -ENODEV; } debug("setting bus speed for slot %d, cmd %x\n", slot_cur->number, cmd); retval = ibmphp_hpc_writeslot(slot_cur, cmd); if (retval) { err("setting bus speed failed\n"); return retval; } if (CTLR_RESULT(slot_cur->ctrl->status)) { err("command not completed successfully in set_bus\n"); return -EIO; } } /* This is for x440, once Brandon fixes the firmware, will not need this delay */ msleep(1000); debug("%s -Exit\n", __func__); return 0;}
/* This routine checks the bus limitations that the slot is on from the BIOS. * This is used in deciding whether or not to power up the slot. * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on * same bus) * Parameters: slot * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus */static int check_limitations(struct slot *slot_cur){ u8 i; struct slot *tmp_slot; u8 count = 0; u8 limitation = 0;
for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) { tmp_slot = ibmphp_get_slot_from_physical_num(i); if (!tmp_slot) return -ENODEV; if ((SLOT_PWRGD(tmp_slot->status)) && !(SLOT_CONNECT(tmp_slot->status))) count++; } get_cur_bus_info(&slot_cur); switch (slot_cur->bus_on->current_speed) { case BUS_SPEED_33: limitation = slot_cur->bus_on->slots_at_33_conv; break; case BUS_SPEED_66: if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX) limitation = slot_cur->bus_on->slots_at_66_pcix; else limitation = slot_cur->bus_on->slots_at_66_conv; break; case BUS_SPEED_100: limitation = slot_cur->bus_on->slots_at_100_pcix; break; case BUS_SPEED_133: limitation = slot_cur->bus_on->slots_at_133_pcix; break; }
if ((count + 1) > limitation) return -EINVAL; return 0;}
static inline void print_card_capability(struct slot *slot_cur){ info("capability of the card is "); if ((slot_cur->ext_status & CARD_INFO) == PCIX133) info(" 133 MHz PCI-X\n"); else if ((slot_cur->ext_status & CARD_INFO) == PCIX66) info(" 66 MHz PCI-X\n"); else if ((slot_cur->ext_status & CARD_INFO) == PCI66) info(" 66 MHz PCI\n"); else info(" 33 MHz PCI\n");
}
/* This routine will power on the slot, configure the device(s) and find the * drivers for them. * Parameters: hotplug_slot * Returns: 0 or failure codes */static int enable_slot(struct hotplug_slot *hs){ int rc, i, rcpr; struct slot *slot_cur; u8 function; struct pci_func *tmp_func;
ibmphp_lock_operations();
debug("ENABLING SLOT........\n"); slot_cur = to_slot(hs);
rc = validate(slot_cur, ENABLE); if (rc) { err("validate function failed\n"); goto error_nopower; }
attn_LED_blink(slot_cur);
rc = set_bus(slot_cur); if (rc) { err("was not able to set the bus\n"); goto error_nopower; }
/*-----------------debugging------------------------------*/ get_cur_bus_info(&slot_cur); debug("the current bus speed right after set_bus = %x\n", slot_cur->bus_on->current_speed); /*----------------------------------------------------------*/
rc = check_limitations(slot_cur); if (rc) { err("Adding this card exceeds the limitations of this bus.\n"); err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n"); err("Try hot-adding into another bus\n"); rc = -EINVAL; goto error_nopower; }
rc = power_on(slot_cur);
if (rc) { err("something wrong when powering up... please see below for details\n"); /* need to turn off before on, otherwise, blinking overwrites */ attn_off(slot_cur); attn_on(slot_cur); if (slot_update(&slot_cur)) { attn_off(slot_cur); attn_on(slot_cur); rc = -ENODEV; goto exit; } /* Check to see the error of why it failed */ if ((SLOT_POWER(slot_cur->status)) && !(SLOT_PWRGD(slot_cur->status))) err("power fault occurred trying to power up\n"); else if (SLOT_BUS_SPEED(slot_cur->status)) { err("bus speed mismatch occurred. please check current bus speed and card capability\n"); print_card_capability(slot_cur); } else if (SLOT_BUS_MODE(slot_cur->ext_status)) { err("bus mode mismatch occurred. please check current bus mode and card capability\n"); print_card_capability(slot_cur); } ibmphp_update_slot_info(slot_cur); goto exit; } debug("after power_on\n"); /*-----------------------debugging---------------------------*/ get_cur_bus_info(&slot_cur); debug("the current bus speed right after power_on = %x\n", slot_cur->bus_on->current_speed); /*----------------------------------------------------------*/
rc = slot_update(&slot_cur); if (rc) goto error_power;
rc = -EINVAL; if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) { err("power fault occurred trying to power up...\n"); goto error_power; } if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) { err("bus speed mismatch occurred. please check current bus speed and card capability\n"); print_card_capability(slot_cur); goto error_power; } /* Don't think this case will happen after above checks... * but just in case, for paranoia sake */ if (!(SLOT_POWER(slot_cur->status))) { err("power on failed...\n"); goto error_power; }
slot_cur->func = kzalloc_obj(struct pci_func); if (!slot_cur->func) { /* do update_slot_info here? */ rc = -ENOMEM; goto error_power; } slot_cur->func->busno = slot_cur->bus; slot_cur->func->device = slot_cur->device; for (i = 0; i < 4; i++) slot_cur->func->irq[i] = slot_cur->irq[i];
debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n", slot_cur->bus, slot_cur->device);
if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) { err("configure_card was unsuccessful...\n"); /* true because don't need to actually deallocate resources, * just remove references */ ibmphp_unconfigure_card(&slot_cur, 1); debug("after unconfigure_card\n"); slot_cur->func = NULL; rc = -ENOMEM; goto error_power; }
function = 0x00; do { tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device, function++); if (tmp_func && !(tmp_func->dev)) ibm_configure_device(tmp_func); } while (tmp_func);
attn_off(slot_cur); if (slot_update(&slot_cur)) { rc = -EFAULT; goto exit; } ibmphp_print_test(); rc = ibmphp_update_slot_info(slot_cur);exit: ibmphp_unlock_operations(); return rc;
error_nopower: attn_off(slot_cur); /* need to turn off if was blinking b4 */ attn_on(slot_cur);error_cont: rcpr = slot_update(&slot_cur); if (rcpr) { rc = rcpr; goto exit; } ibmphp_update_slot_info(slot_cur); goto exit;
error_power: attn_off(slot_cur); /* need to turn off if was blinking b4 */ attn_on(slot_cur); rcpr = power_off(slot_cur); if (rcpr) { rc = rcpr; goto exit; } goto error_cont;}
/*************************************************************** HOT REMOVING ADAPTER CARD ** INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE ** OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE ** DISABLE POWER , ***************************************************************/static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot){ struct slot *slot = to_slot(hotplug_slot); int rc;
ibmphp_lock_operations(); rc = ibmphp_do_disable_slot(slot); ibmphp_unlock_operations(); return rc;}
int ibmphp_do_disable_slot(struct slot *slot_cur){ int rc; u8 flag;
debug("DISABLING SLOT...\n");
if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) return -ENODEV;
flag = slot_cur->flag; slot_cur->flag = 1;
if (flag == 1) { rc = validate(slot_cur, DISABLE); /* checking if powered off already & valid slot # */ if (rc) goto error; } attn_LED_blink(slot_cur);
if (slot_cur->func == NULL) { /* We need this for functions that were there on bootup */ slot_cur->func = kzalloc_obj(struct pci_func); if (!slot_cur->func) { rc = -ENOMEM; goto error; } slot_cur->func->busno = slot_cur->bus; slot_cur->func->device = slot_cur->device; }
ibm_unconfigure_device(slot_cur->func);
/* * If we got here from latch suddenly opening on operating card or * a power fault, there's no power to the card, so cannot * read from it to determine what resources it occupied. This operation * is forbidden anyhow. The best we can do is remove it from kernel * lists at least */
if (!flag) { attn_off(slot_cur); return 0; }
rc = ibmphp_unconfigure_card(&slot_cur, 0); slot_cur->func = NULL; debug("in disable_slot. after unconfigure_card\n"); if (rc) { err("could not unconfigure card.\n"); goto error; }
rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF); if (rc) goto error;
attn_off(slot_cur); rc = slot_update(&slot_cur); if (rc) goto exit;
rc = ibmphp_update_slot_info(slot_cur); ibmphp_print_test();exit: return rc;
error: /* Need to turn off if was blinking b4 */ attn_off(slot_cur); attn_on(slot_cur); if (slot_update(&slot_cur)) { rc = -EFAULT; goto exit; } if (flag) ibmphp_update_slot_info(slot_cur); goto exit;}
const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = { .set_attention_status = set_attention_status, .enable_slot = enable_slot, .disable_slot = ibmphp_disable_slot, .hardware_test = NULL, .get_power_status = get_power_status, .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_present,};
static void ibmphp_unload(void){ free_slots(); debug("after slots\n"); ibmphp_free_resources(); debug("after resources\n"); ibmphp_free_bus_info_queue(); debug("after bus info\n"); ibmphp_free_ebda_hpc_queue(); debug("after ebda hpc\n"); ibmphp_free_ebda_pci_rsrc_queue(); debug("after ebda pci rsrc\n"); kfree(ibmphp_pci_bus);}
static int __init ibmphp_init(void){ struct pci_bus *bus; int i = 0; int rc = 0;
init_flag = 1;
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
ibmphp_pci_bus = kmalloc_obj(*ibmphp_pci_bus); if (!ibmphp_pci_bus) { rc = -ENOMEM; goto exit; }
bus = pci_find_bus(0, 0); if (!bus) { err("Can't find the root pci bus, can not continue\n"); rc = -ENODEV; goto error; } memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
ibmphp_debug = debug;
for (i = 0; i < 16; i++) irqs[i] = 0;
rc = ibmphp_access_ebda(); if (rc) goto error; debug("after ibmphp_access_ebda()\n");
rc = ibmphp_rsrc_init(); if (rc) goto error; debug("AFTER Resource & EBDA INITIALIZATIONS\n");
max_slots = get_max_slots();
rc = ibmphp_register_pci(); if (rc) goto error;
if (init_ops()) { rc = -ENODEV; goto error; }
ibmphp_print_test(); rc = ibmphp_hpc_start_poll_thread(); if (rc) goto error;
exit: return rc;
error: ibmphp_unload(); goto exit;}
static void __exit ibmphp_exit(void){ ibmphp_hpc_stop_poll_thread(); debug("after polling\n"); ibmphp_unload(); debug("done\n");}
module_init(ibmphp_init);module_exit(ibmphp_exit);