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path: root/drivers/pci/hotplug/sgi_hotplug.c
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Diffstat (limited to 'drivers/pci/hotplug/sgi_hotplug.c')
-rw-r--r--drivers/pci/hotplug/sgi_hotplug.c195
1 files changed, 91 insertions, 104 deletions
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index 323041fd41dc..a32ae82e5922 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -32,14 +32,15 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)");
MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver");
-#define PCIIO_ASIC_TYPE_TIOCA 4
-#define PCI_SLOT_ALREADY_UP 2 /* slot already up */
-#define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */
-#define PCI_L1_ERR 7 /* L1 console command error */
-#define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */
-#define PCI_L1_QSIZE 128 /* our L1 message buffer size */
-#define SN_MAX_HP_SLOTS 32 /* max number of hotplug slots */
-#define SGI_HOTPLUG_PROM_REV 0x0420 /* Min. required PROM version */
+#define PCIIO_ASIC_TYPE_TIOCA 4
+#define PCI_SLOT_ALREADY_UP 2 /* slot already up */
+#define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */
+#define PCI_L1_ERR 7 /* L1 console command error */
+#define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */
+#define PCI_L1_QSIZE 128 /* our L1 message buffer size */
+#define SN_MAX_HP_SLOTS 32 /* max hotplug slots */
+#define SGI_HOTPLUG_PROM_REV 0x0430 /* Min. required PROM version */
+#define SN_SLOT_NAME_SIZE 33 /* size of name string */
/* internal list head */
static struct list_head sn_hp_list;
@@ -51,6 +52,7 @@ struct slot {
/* this struct for glue internal only */
struct hotplug_slot *hotplug_slot;
struct list_head hp_list;
+ char physical_path[SN_SLOT_NAME_SIZE];
};
struct pcibr_slot_enable_resp {
@@ -70,7 +72,7 @@ enum sn_pci_req_e {
static int enable_slot(struct hotplug_slot *slot);
static int disable_slot(struct hotplug_slot *slot);
-static int get_power_status(struct hotplug_slot *slot, u8 *value);
+static inline int get_power_status(struct hotplug_slot *slot, u8 *value);
static struct hotplug_slot_ops sn_hotplug_slot_ops = {
.owner = THIS_MODULE,
@@ -81,6 +83,21 @@ static struct hotplug_slot_ops sn_hotplug_slot_ops = {
static DECLARE_MUTEX(sn_hotplug_sem);
+static ssize_t path_show (struct hotplug_slot *bss_hotplug_slot,
+ char *buf)
+{
+ int retval = -ENOENT;
+ struct slot *slot = bss_hotplug_slot->private;
+
+ if (!slot)
+ return retval;
+
+ retval = sprintf (buf, "%s\n", slot->physical_path);
+ return retval;
+}
+
+static struct hotplug_slot_attribute sn_slot_path_attr = __ATTR_RO(path);
+
static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device)
{
struct pcibus_info *pcibus_info;
@@ -120,15 +137,15 @@ static int sn_pci_bus_valid(struct pci_bus *pci_bus)
/* Only register slots in I/O Bricks that support hotplug */
bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid);
switch (bricktype) {
- case L1_BRICKTYPE_IX:
- case L1_BRICKTYPE_PX:
- case L1_BRICKTYPE_IA:
- case L1_BRICKTYPE_PA:
- return 1;
- break;
- default:
- return -EPERM;
- break;
+ case L1_BRICKTYPE_IX:
+ case L1_BRICKTYPE_PX:
+ case L1_BRICKTYPE_IA:
+ case L1_BRICKTYPE_PA:
+ return 1;
+ break;
+ default:
+ return -EPERM;
+ break;
}
return -EIO;
@@ -142,13 +159,12 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
- bss_hotplug_slot->private = kcalloc(1, sizeof(struct slot),
- GFP_KERNEL);
- if (!bss_hotplug_slot->private)
+ slot = kzalloc(sizeof(*slot), GFP_KERNEL);
+ if (!slot)
return -ENOMEM;
- slot = (struct slot *)bss_hotplug_slot->private;
+ bss_hotplug_slot->private = slot;
- bss_hotplug_slot->name = kmalloc(33, GFP_KERNEL);
+ bss_hotplug_slot->name = kmalloc(SN_SLOT_NAME_SIZE, GFP_KERNEL);
if (!bss_hotplug_slot->name) {
kfree(bss_hotplug_slot->private);
return -ENOMEM;
@@ -156,16 +172,16 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
slot->device_num = device;
slot->pci_bus = pci_bus;
-
- sprintf(bss_hotplug_slot->name, "module_%c%c%c%c%.2d_b_%d_s_%d",
+ sprintf(bss_hotplug_slot->name, "%04x:%02x:%02x",
+ pci_domain_nr(pci_bus),
+ ((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf,
+ device + 1);
+ sprintf(slot->physical_path, "module_%c%c%c%c%.2d",
'0'+RACK_GET_CLASS(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
'0'+RACK_GET_GROUP(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
'0'+RACK_GET_NUM(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
MODULE_GET_BTCHAR(pcibus_info->pbi_moduleid),
- MODULE_GET_BPOS(pcibus_info->pbi_moduleid),
- ((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf,
- device + 1);
-
+ MODULE_GET_BPOS(pcibus_info->pbi_moduleid));
slot->hotplug_slot = bss_hotplug_slot;
list_add(&slot->hp_list, &sn_hp_list);
@@ -175,14 +191,14 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
static struct hotplug_slot * sn_hp_destroy(void)
{
struct slot *slot;
- struct list_head *list;
struct hotplug_slot *bss_hotplug_slot = NULL;
- list_for_each(list, &sn_hp_list) {
- slot = list_entry(list, struct slot, hp_list);
+ list_for_each_entry(slot, &sn_hp_list, hp_list) {
bss_hotplug_slot = slot->hotplug_slot;
list_del(&((struct slot *)bss_hotplug_slot->private)->
hp_list);
+ sysfs_remove_file(&bss_hotplug_slot->kobj,
+ &sn_slot_path_attr.attr);
break;
}
return bss_hotplug_slot;
@@ -190,7 +206,6 @@ static struct hotplug_slot * sn_hp_destroy(void)
static void sn_bus_alloc_data(struct pci_dev *dev)
{
- struct list_head *node;
struct pci_bus *subordinate_bus;
struct pci_dev *child;
@@ -199,66 +214,29 @@ static void sn_bus_alloc_data(struct pci_dev *dev)
/* Recursively sets up the sn_irq_info structs */
if (dev->subordinate) {
subordinate_bus = dev->subordinate;
- list_for_each(node, &subordinate_bus->devices) {
- child = list_entry(node, struct pci_dev, bus_list);
+ list_for_each_entry(child, &subordinate_bus->devices, bus_list)
sn_bus_alloc_data(child);
- }
}
}
static void sn_bus_free_data(struct pci_dev *dev)
{
- struct list_head *node;
struct pci_bus *subordinate_bus;
struct pci_dev *child;
/* Recursively clean up sn_irq_info structs */
if (dev->subordinate) {
subordinate_bus = dev->subordinate;
- list_for_each(node, &subordinate_bus->devices) {
- child = list_entry(node, struct pci_dev, bus_list);
+ list_for_each_entry(child, &subordinate_bus->devices, bus_list)
sn_bus_free_data(child);
- }
}
sn_pci_unfixup_slot(dev);
}
-static u8 sn_power_status_get(struct hotplug_slot *bss_hotplug_slot)
-{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
- struct pcibus_info *pcibus_info;
- u8 retval;
-
- pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
- retval = pcibus_info->pbi_enabled_devices & (1 << slot->device_num);
-
- return retval ? 1 : 0;
-}
-
-static void sn_slot_mark_enable(struct hotplug_slot *bss_hotplug_slot,
- int device_num)
-{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
- struct pcibus_info *pcibus_info;
-
- pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
- pcibus_info->pbi_enabled_devices |= (1 << device_num);
-}
-
-static void sn_slot_mark_disable(struct hotplug_slot *bss_hotplug_slot,
- int device_num)
-{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
- struct pcibus_info *pcibus_info;
-
- pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
- pcibus_info->pbi_enabled_devices &= ~(1 << device_num);
-}
-
static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
int device_num)
{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
+ struct slot *slot = bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
struct pcibr_slot_enable_resp resp;
int rc;
@@ -273,7 +251,7 @@ static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
if (rc == PCI_SLOT_ALREADY_UP) {
dev_dbg(slot->pci_bus->self, "is already active\n");
- return -EPERM;
+ return 1; /* return 1 to user */
}
if (rc == PCI_L1_ERR) {
@@ -290,7 +268,8 @@ static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
return -EIO;
}
- sn_slot_mark_enable(bss_hotplug_slot, device_num);
+ pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
+ pcibus_info->pbi_enabled_devices |= (1 << device_num);
return 0;
}
@@ -298,7 +277,7 @@ static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
int device_num, int action)
{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
+ struct slot *slot = bss_hotplug_slot->private;
struct pcibus_info *pcibus_info;
struct pcibr_slot_disable_resp resp;
int rc;
@@ -307,43 +286,44 @@ static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp);
- if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_SLOT_ALREADY_DOWN) {
+ if ((action == PCI_REQ_SLOT_ELIGIBLE) &&
+ (rc == PCI_SLOT_ALREADY_DOWN)) {
dev_dbg(slot->pci_bus->self, "Slot %s already inactive\n");
- return -ENODEV;
+ return 1; /* return 1 to user */
}
- if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_EMPTY_33MHZ) {
+ if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_EMPTY_33MHZ)) {
dev_dbg(slot->pci_bus->self,
"Cannot remove last 33MHz card\n");
return -EPERM;
}
- if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_L1_ERR) {
+ if ((action == PCI_REQ_SLOT_ELIGIBLE) && (rc == PCI_L1_ERR)) {
dev_dbg(slot->pci_bus->self,
"L1 failure %d with message \n%s\n",
resp.resp_sub_errno, resp.resp_l1_msg);
return -EPERM;
}
- if (action == PCI_REQ_SLOT_ELIGIBLE && rc) {
+ if ((action == PCI_REQ_SLOT_ELIGIBLE) && rc) {
dev_dbg(slot->pci_bus->self,
"remove failed with error %d sub-error %d\n",
rc, resp.resp_sub_errno);
return -EIO;
}
- if (action == PCI_REQ_SLOT_ELIGIBLE && !rc)
+ if ((action == PCI_REQ_SLOT_ELIGIBLE) && !rc)
return 0;
- if (action == PCI_REQ_SLOT_DISABLE && !rc) {
- sn_slot_mark_disable(bss_hotplug_slot, device_num);
+ if ((action == PCI_REQ_SLOT_DISABLE) && !rc) {
+ pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
+ pcibus_info->pbi_enabled_devices &= ~(1 << device_num);
dev_dbg(slot->pci_bus->self, "remove successful\n");
return 0;
}
- if (action == PCI_REQ_SLOT_DISABLE && rc) {
+ if ((action == PCI_REQ_SLOT_DISABLE) && rc) {
dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc);
- return rc;
}
return rc;
@@ -351,7 +331,7 @@ static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
+ struct slot *slot = bss_hotplug_slot->private;
struct pci_bus *new_bus = NULL;
struct pci_dev *dev;
int func, num_funcs;
@@ -371,8 +351,8 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
return rc;
}
- num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1,
- PCI_FUNC(0)));
+ num_funcs = pci_scan_slot(slot->pci_bus,
+ PCI_DEVFN(slot->device_num + 1, 0));
if (!num_funcs) {
dev_dbg(slot->pci_bus->self, "no device in slot\n");
up(&sn_hotplug_sem);
@@ -391,8 +371,6 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
dev = pci_get_slot(slot->pci_bus,
PCI_DEVFN(slot->device_num + 1,
PCI_FUNC(func)));
-
-
if (dev) {
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
unsigned char sec_bus;
@@ -431,7 +409,7 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
{
- struct slot *slot = (struct slot *)bss_hotplug_slot->private;
+ struct slot *slot = bss_hotplug_slot->private;
struct pci_dev *dev;
int func;
int rc;
@@ -448,7 +426,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
/* Free the SN resources assigned to the Linux device.*/
for (func = 0; func < 8; func++) {
dev = pci_get_slot(slot->pci_bus,
- PCI_DEVFN(slot->device_num+1,
+ PCI_DEVFN(slot->device_num + 1,
PCI_FUNC(func)));
if (dev) {
/*
@@ -477,10 +455,15 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
return rc;
}
-static int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value)
+static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot,
+ u8 *value)
{
+ struct slot *slot = bss_hotplug_slot->private;
+ struct pcibus_info *pcibus_info;
+
+ pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
down(&sn_hotplug_sem);
- *value = sn_power_status_get(bss_hotplug_slot);
+ *value = pcibus_info->pbi_enabled_devices & (1 << slot->device_num);
up(&sn_hotplug_sem);
return 0;
}
@@ -508,7 +491,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
if (sn_pci_slot_valid(pci_bus, device) != 1)
continue;
- bss_hotplug_slot = kcalloc(1,sizeof(struct hotplug_slot),
+ bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot),
GFP_KERNEL);
if (!bss_hotplug_slot) {
rc = -ENOMEM;
@@ -516,7 +499,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
}
bss_hotplug_slot->info =
- kcalloc(1,sizeof(struct hotplug_slot_info),
+ kzalloc(sizeof(struct hotplug_slot_info),
GFP_KERNEL);
if (!bss_hotplug_slot->info) {
rc = -ENOMEM;
@@ -535,6 +518,11 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
rc = pci_hp_register(bss_hotplug_slot);
if (rc)
goto register_err;
+
+ rc = sysfs_create_file(&bss_hotplug_slot->kobj,
+ &sn_slot_path_attr.attr);
+ if (rc)
+ goto register_err;
}
dev_dbg(pci_bus->self, "Registered bus with hotplug\n");
return rc;
@@ -564,14 +552,14 @@ static int sn_pci_hotplug_init(void)
int rc;
int registered = 0;
- INIT_LIST_HEAD(&sn_hp_list);
-
if (sn_sal_rev() < SGI_HOTPLUG_PROM_REV) {
- printk(KERN_ERR "%s: PROM version must be greater than 4.05\n",
+ printk(KERN_ERR "%s: PROM version must be greater than 4.30\n",
__FUNCTION__);
return -EPERM;
}
+ INIT_LIST_HEAD(&sn_hp_list);
+
while ((pci_bus = pci_find_next_bus(pci_bus))) {
if (!pci_bus->sysdata)
continue;
@@ -584,9 +572,9 @@ static int sn_pci_hotplug_init(void)
dev_dbg(pci_bus->self, "valid hotplug bus\n");
rc = sn_hotplug_slot_register(pci_bus);
- if (!rc)
+ if (!rc) {
registered = 1;
- else {
+ } else {
registered = 0;
break;
}
@@ -599,9 +587,8 @@ static void sn_pci_hotplug_exit(void)
{
struct hotplug_slot *bss_hotplug_slot;
- while ((bss_hotplug_slot = sn_hp_destroy())) {
+ while ((bss_hotplug_slot = sn_hp_destroy()))
pci_hp_deregister(bss_hotplug_slot);
- }
if (!list_empty(&sn_hp_list))
printk(KERN_ERR "%s: internal list is not empty\n", __FILE__);
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