Commit a794b4f3 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'for-linus-4.3' of git://git.code.sf.net/p/openipmi/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Most of these have been sitting in linux-next for more than a release,
  particularly commit 0fbcf4af ("ipmi: Convert the IPMI SI ACPI
  handling to a platform device") which is probably the most complex
  patch.

  That is also the one that changes drivers/acpi/acpi_pnp.c.  The change
  in that file is only removing IPMI from a "special platform devices"
  list, since I convert it to the standard PNP interface.  I posted this
  one to the ACPI list twice and got no response, and it seems to work
  well in my testing, so I'm hoping it's good.

  Hidehiro Kawai posted a set of changes that improves the panic time
  handling in the IPMI driver.

  The rest of the changes are minor bug fixes or cleanups and some
  documentation"

* tag 'for-linus-4.3' of git://git.code.sf.net/p/openipmi/linux-ipmi:
  ipmi:ssif: Add a module parm to specify that SMBus alerts don't work
  ipmi: add of_device_id in MODULE_DEVICE_TABLE
  ipmi: Compensate for BMCs that wont set the irq enable bit
  ipmi: Don't call receive handler in the panic context
  ipmi: Avoid touching possible corrupted lists in the panic context
  ipmi: Don't flush messages in sender() in run-to-completion mode
  ipmi: Factor out message flushing procedure
  ipmi: Remove unneeded set_run_to_completion call
  ipmi: Make some data const that was only read
  ipmi: constify SSIF ACPI device ids
  ipmi: Delete an unnecessary check before the function call "cleanup_one_si"
  char:ipmi - Change 1 to true for bool type variables during initialization.
  impi:Remove unneeded setting of module owner to THIS_MODULE in the platform structure, powernv_ipmi_driver
  ipmi: Add a comment in how messages are delivered from the lower layer
  ipmi/powernv: Fix potential invalid pointer dereference
  ipmi: Convert the IPMI SI ACPI handling to a platform device
  ipmi: Add device tree bindings information
parents f6f7a636 bf2d0877
IPMI device
Required properties:
- compatible: should be one of ipmi-kcs, ipmi-smic, or ipmi-bt
- device_type: should be ipmi
- reg: Address and length of the register set for the device
Optional properties:
- interrupts: The interrupt for the device. Without this the interface
is polled.
- reg-size - The size of the register. Defaults to 1
- reg-spacing - The number of bytes between register starts. Defaults to 1
- reg-shift - The amount to shift the registers to the right to get the data
into bit zero.
Example:
smic@fff3a000 {
compatible = "ipmi-smic";
device_type = "ipmi";
reg = <0xfff3a000 0x1000>;
interrupts = <0 24 4>;
reg-size = <4>;
reg-spacing = <4>;
};
......@@ -19,8 +19,6 @@ static const struct acpi_device_id acpi_pnp_device_ids[] = {
{"PNP0600"}, /* Generic ESDI/IDE/ATA compatible hard disk controller */
/* floppy */
{"PNP0700"},
/* ipmi_si */
{"IPI0001"},
/* tpm_inf_pnp */
{"IFX0101"}, /* Infineon TPMs */
{"IFX0102"}, /* Infineon TPMs */
......
......@@ -694,7 +694,7 @@ static int bt_size(void)
return sizeof(struct si_sm_data);
}
struct si_sm_handlers bt_smi_handlers = {
const struct si_sm_handlers bt_smi_handlers = {
.init_data = bt_init_data,
.start_transaction = bt_start_transaction,
.get_result = bt_get_result,
......
......@@ -540,7 +540,7 @@ static void kcs_cleanup(struct si_sm_data *kcs)
{
}
struct si_sm_handlers kcs_smi_handlers = {
const struct si_sm_handlers kcs_smi_handlers = {
.init_data = init_kcs_data,
.start_transaction = start_kcs_transaction,
.get_result = get_kcs_result,
......
......@@ -342,7 +342,7 @@ struct ipmi_smi {
* an umpreemptible region to use this. You must fetch the
* value into a local variable and make sure it is not NULL.
*/
struct ipmi_smi_handlers *handlers;
const struct ipmi_smi_handlers *handlers;
void *send_info;
#ifdef CONFIG_PROC_FS
......@@ -744,7 +744,13 @@ static void deliver_response(struct ipmi_recv_msg *msg)
ipmi_inc_stat(intf, unhandled_local_responses);
}
ipmi_free_recv_msg(msg);
} else {
} else if (!oops_in_progress) {
/*
* If we are running in the panic context, calling the
* receive handler doesn't much meaning and has a deadlock
* risk. At this moment, simply skip it in that case.
*/
ipmi_user_t user = msg->user;
user->handler->ipmi_recv_hndl(msg, user->handler_data);
}
......@@ -1015,7 +1021,7 @@ int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data)
{
int rv = 0;
ipmi_smi_t intf;
struct ipmi_smi_handlers *handlers;
const struct ipmi_smi_handlers *handlers;
mutex_lock(&ipmi_interfaces_mutex);
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
......@@ -1501,7 +1507,7 @@ static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf,
}
static void smi_send(ipmi_smi_t intf, struct ipmi_smi_handlers *handlers,
static void smi_send(ipmi_smi_t intf, const struct ipmi_smi_handlers *handlers,
struct ipmi_smi_msg *smi_msg, int priority)
{
int run_to_completion = intf->run_to_completion;
......@@ -2747,7 +2753,7 @@ void ipmi_poll_interface(ipmi_user_t user)
}
EXPORT_SYMBOL(ipmi_poll_interface);
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
void *send_info,
struct ipmi_device_id *device_id,
struct device *si_dev,
......@@ -3959,6 +3965,10 @@ void ipmi_smi_msg_received(ipmi_smi_t intf,
if (!run_to_completion)
spin_lock_irqsave(&intf->xmit_msgs_lock, flags);
/*
* We can get an asynchronous event or receive message in addition
* to commands we send.
*/
if (msg == intf->curr_msg)
intf->curr_msg = NULL;
if (!run_to_completion)
......@@ -4015,7 +4025,7 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
unsigned int *waiting_msgs)
{
struct ipmi_recv_msg *msg;
struct ipmi_smi_handlers *handlers;
const struct ipmi_smi_handlers *handlers;
if (intf->in_shutdown)
return;
......@@ -4082,7 +4092,7 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
ipmi_inc_stat(intf,
retransmitted_ipmb_commands);
smi_send(intf, intf->handlers, smi_msg, 0);
smi_send(intf, handlers, smi_msg, 0);
} else
ipmi_free_smi_msg(smi_msg);
......@@ -4291,6 +4301,9 @@ static void ipmi_panic_request_and_wait(ipmi_smi_t intf,
0, 1); /* Don't retry, and don't wait. */
if (rv)
atomic_sub(2, &panic_done_count);
else if (intf->handlers->flush_messages)
intf->handlers->flush_messages(intf->send_info);
while (atomic_read(&panic_done_count) != 0)
ipmi_poll(intf);
}
......@@ -4364,9 +4377,7 @@ static void send_panic_events(char *str)
/* Interface is not ready. */
continue;
intf->run_to_completion = 1;
/* Send the event announcing the panic. */
intf->handlers->set_run_to_completion(intf->send_info, 1);
ipmi_panic_request_and_wait(intf, &addr, &msg);
}
......@@ -4506,6 +4517,23 @@ static int panic_event(struct notifier_block *this,
/* Interface is not ready. */
continue;
/*
* If we were interrupted while locking xmit_msgs_lock or
* waiting_rcv_msgs_lock, the corresponding list may be
* corrupted. In this case, drop items on the list for
* the safety.
*/
if (!spin_trylock(&intf->xmit_msgs_lock)) {
INIT_LIST_HEAD(&intf->xmit_msgs);
INIT_LIST_HEAD(&intf->hp_xmit_msgs);
} else
spin_unlock(&intf->xmit_msgs_lock);
if (!spin_trylock(&intf->waiting_rcv_msgs_lock))
INIT_LIST_HEAD(&intf->waiting_rcv_msgs);
else
spin_unlock(&intf->waiting_rcv_msgs_lock);
intf->run_to_completion = 1;
intf->handlers->set_run_to_completion(intf->send_info, 1);
}
......
......@@ -143,8 +143,15 @@ static int ipmi_powernv_recv(struct ipmi_smi_powernv *smi)
pr_devel("%s: -> %d (size %lld)\n", __func__,
rc, rc == 0 ? size : 0);
if (rc) {
/* If came via the poll, and response was not yet ready */
if (rc == OPAL_EMPTY) {
spin_unlock_irqrestore(&smi->msg_lock, flags);
ipmi_free_smi_msg(msg);
return 0;
}
smi->cur_msg = NULL;
spin_unlock_irqrestore(&smi->msg_lock, flags);
send_error_reply(smi, msg, IPMI_ERR_UNSPECIFIED);
return 0;
}
......@@ -300,7 +307,6 @@ static const struct of_device_id ipmi_powernv_match[] = {
static struct platform_driver powernv_ipmi_driver = {
.driver = {
.name = "ipmi-powernv",
.owner = THIS_MODULE,
.of_match_table = ipmi_powernv_match,
},
.probe = ipmi_powernv_probe,
......
This diff is collapsed.
......@@ -46,8 +46,8 @@ struct si_sm_data;
* this interface.
*/
struct si_sm_io {
unsigned char (*inputb)(struct si_sm_io *io, unsigned int offset);
void (*outputb)(struct si_sm_io *io,
unsigned char (*inputb)(const struct si_sm_io *io, unsigned int offset);
void (*outputb)(const struct si_sm_io *io,
unsigned int offset,
unsigned char b);
......@@ -135,7 +135,7 @@ struct si_sm_handlers {
};
/* Current state machines that we can use. */
extern struct si_sm_handlers kcs_smi_handlers;
extern struct si_sm_handlers smic_smi_handlers;
extern struct si_sm_handlers bt_smi_handlers;
extern const struct si_sm_handlers kcs_smi_handlers;
extern const struct si_sm_handlers smic_smi_handlers;
extern const struct si_sm_handlers bt_smi_handlers;
......@@ -589,7 +589,7 @@ static int smic_size(void)
return sizeof(struct si_sm_data);
}
struct si_sm_handlers smic_smi_handlers = {
const struct si_sm_handlers smic_smi_handlers = {
.init_data = init_smic_data,
.start_transaction = start_smic_transaction,
.get_result = smic_get_result,
......
......@@ -1136,6 +1136,10 @@ module_param_array(slave_addrs, int, &num_slave_addrs, 0);
MODULE_PARM_DESC(slave_addrs,
"The default IPMB slave address for the controller.");
static bool alerts_broken;
module_param(alerts_broken, bool, 0);
MODULE_PARM_DESC(alerts_broken, "Don't enable alerts for the controller.");
/*
* Bit 0 enables message debugging, bit 1 enables state debugging, and
* bit 2 enables timing debugging. This is an array indexed by
......@@ -1154,11 +1158,11 @@ static int use_thread;
module_param(use_thread, int, 0);
MODULE_PARM_DESC(use_thread, "Use the thread interface.");
static bool ssif_tryacpi = 1;
static bool ssif_tryacpi = true;
module_param_named(tryacpi, ssif_tryacpi, bool, 0);
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the default scan of the interfaces identified via ACPI");
static bool ssif_trydmi = 1;
static bool ssif_trydmi = true;
module_param_named(trydmi, ssif_trydmi, bool, 0);
MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the default scan of the interfaces identified via DMI (SMBIOS)");
......@@ -1582,6 +1586,10 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
ssif_info->global_enables |= IPMI_BMC_EVT_MSG_BUFF;
}
/* Some systems don't behave well if you enable alerts. */
if (alerts_broken)
goto found;
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
msg[2] = ssif_info->global_enables | IPMI_BMC_RCV_MSG_INTR;
......@@ -1787,7 +1795,7 @@ static unsigned short *ssif_address_list(void)
}
#ifdef CONFIG_ACPI
static struct acpi_device_id ssif_acpi_match[] = {
static const struct acpi_device_id ssif_acpi_match[] = {
{ "IPI0001", 0 },
{ },
};
......
......@@ -115,6 +115,11 @@ struct ipmi_smi_handlers {
implement it. */
void (*set_need_watch)(void *send_info, bool enable);
/*
* Called when flushing all pending messages.
*/
void (*flush_messages)(void *send_info);
/* Called when the interface should go into "run to
completion" mode. If this call sets the value to true, the
interface should make sure that all messages are flushed
......@@ -207,7 +212,7 @@ static inline int ipmi_demangle_device_id(const unsigned char *data,
upper layer until the start_processing() function in the handlers
is called, and the lower layer must get the interface from that
call. */
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
void *send_info,
struct ipmi_device_id *device_id,
struct device *dev,
......
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