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Lots of minor IPMI fixes, especially ones that have have come up since 

the SSIF driver has been in the main kernel for a while.
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Merge tag 'for-linus-4.1-1' of git://git.code.sf.net/p/openipmi/linux-ipmi

Pull IPMI fixes from Corey Minyard:
 "Lots of minor IPMI fixes, especially ones that have have come up since
  the SSIF driver has been in the main kernel for a while"

* tag 'for-linus-4.1-1' of git://git.code.sf.net/p/openipmi/linux-ipmi:
  ipmi: Fix multi-part message handling
  ipmi: Add alert handling to SSIF
  ipmi: Fix a problem that messages are not issued in run_to_completion mode
  ipmi: Report an error if ACPI _IFT doesn't exist
  ipmi: Remove unused including <linux/version.h>
  ipmi: Don't report err in the SI driver for SSIF devices
  ipmi: Remove incorrect use of seq_has_overflowed
  ipmi:ssif: Ignore spaces when comparing I2C adapter names
  ipmi_ssif: Fix the logic on user-supplied addresses
This commit is contained in:
Linus Torvalds 2015-05-05 19:42:01 -07:00
parent 2a171aa21a 3d69d43baa
commit 5198b44374
4 changed files with 193 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/IPMI.txt
View File

@ -505,7 +505,10 @@ at module load time (for a module) with:
The addresses are normal I2C addresses. The adapter is the string
name of the adapter, as shown in /sys/class/i2c-adapter/i2c-<n>/name.
It is *NOT* i2c-<n> itself.
It is *NOT* i2c-<n> itself. Also, the comparison is done ignoring
spaces, so if the name is "This is an I2C chip" you can say
adapter_name=ThisisanI2cchip. This is because it's hard to pass in
spaces in kernel parameters.
The debug flags are bit flags for each BMC found, they are:
IPMI messages: 1, driver state: 2, timing: 4, I2C probe: 8

4
drivers/char/ipmi/ipmi_msghandler.c
View File

@ -2000,7 +2000,7 @@ static int smi_ipmb_proc_show(struct seq_file *m, void *v)
seq_printf(m, " %x", intf->channels[i].address);
seq_putc(m, '\n');
return seq_has_overflowed(m);
return 0;
}
static int smi_ipmb_proc_open(struct inode *inode, struct file *file)
@ -2023,7 +2023,7 @@ static int smi_version_proc_show(struct seq_file *m, void *v)
ipmi_version_major(&intf->bmc->id),
ipmi_version_minor(&intf->bmc->id));
return seq_has_overflowed(m);
return 0;
}
static int smi_version_proc_open(struct inode *inode, struct file *file)

16
drivers/char/ipmi/ipmi_si_intf.c
View File

@ -942,8 +942,7 @@ static void sender(void *send_info,
* If we are running to completion, start it and run
* transactions until everything is clear.
*/
smi_info->curr_msg = msg;
smi_info->waiting_msg = NULL;
smi_info->waiting_msg = msg;
/*
* Run to completion means we are single-threaded, no
@ -2244,7 +2243,7 @@ static int ipmi_pnp_probe(struct pnp_dev *dev,
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
int rv;
int rv = -EINVAL;
acpi_dev = pnp_acpi_device(dev);
if (!acpi_dev)
@ -2262,8 +2261,10 @@ static int ipmi_pnp_probe(struct pnp_dev *dev,
/* _IFT tells us the interface type: KCS, BT, etc */
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
dev_err(&dev->dev, "Could not find ACPI IPMI interface type\n");
goto err_free;
}
switch (tmp) {
case 1:
@ -2276,6 +2277,7 @@ static int ipmi_pnp_probe(struct pnp_dev *dev,
info->si_type = SI_BT;
break;
case 4: /* SSIF, just ignore */
rv = -ENODEV;
goto err_free;
default:
dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
@ -2336,7 +2338,7 @@ static int ipmi_pnp_probe(struct pnp_dev *dev,
err_free:
kfree(info);
return -EINVAL;
return rv;
}
static void ipmi_pnp_remove(struct pnp_dev *dev)
@ -3080,7 +3082,7 @@ static int smi_type_proc_show(struct seq_file *m, void *v)
seq_printf(m, "%s\n", si_to_str[smi->si_type]);
return seq_has_overflowed(m);
return 0;
}
static int smi_type_proc_open(struct inode *inode, struct file *file)
@ -3153,7 +3155,7 @@ static int smi_params_proc_show(struct seq_file *m, void *v)
smi->irq,
smi->slave_addr);
return seq_has_overflowed(m);
return 0;
}
static int smi_params_proc_open(struct inode *inode, struct file *file)

213
drivers/char/ipmi/ipmi_ssif.c
View File

@ -31,7 +31,6 @@
* interface into the I2C driver, I believe.
*/
#include <linux/version.h>
#if defined(MODVERSIONS)
#include <linux/modversions.h>
#endif
@ -166,6 +165,9 @@ enum ssif_stat_indexes {
/* Number of watchdog pretimeouts. */
SSIF_STAT_watchdog_pretimeouts,
/* Number of alers received. */
SSIF_STAT_alerts,
/* Always add statistics before this value, it must be last. */
SSIF_NUM_STATS
};
@ -214,7 +216,16 @@ struct ssif_info {
#define WDT_PRE_TIMEOUT_INT 0x08
unsigned char msg_flags;
u8 global_enables;
bool has_event_buffer;
bool supports_alert;
/*
* Used to tell what we should do with alerts. If we are
* waiting on a response, read the data immediately.
*/
bool got_alert;
bool waiting_alert;
/*
* If set to true, this will request events the next time the
@ -478,13 +489,13 @@ static int ipmi_ssif_thread(void *data)
if (ssif_info->i2c_read_write == I2C_SMBUS_WRITE) {
result = i2c_smbus_write_block_data(
ssif_info->client, SSIF_IPMI_REQUEST,
ssif_info->client, ssif_info->i2c_command,
ssif_info->i2c_data[0],
ssif_info->i2c_data + 1);
ssif_info->done_handler(ssif_info, result, NULL, 0);
} else {
result = i2c_smbus_read_block_data(
ssif_info->client, SSIF_IPMI_RESPONSE,
ssif_info->client, ssif_info->i2c_command,
ssif_info->i2c_data);
if (result < 0)
ssif_info->done_handler(ssif_info, result,
@ -518,15 +529,12 @@ static int ssif_i2c_send(struct ssif_info *ssif_info,
static void msg_done_handler(struct ssif_info *ssif_info, int result,
unsigned char *data, unsigned int len);
static void retry_timeout(unsigned long data)
static void start_get(struct ssif_info *ssif_info)
{
struct ssif_info *ssif_info = (void *) data;
int rv;
if (ssif_info->stopping)
return;
ssif_info->rtc_us_timer = 0;
ssif_info->multi_pos = 0;
rv = ssif_i2c_send(ssif_info, msg_done_handler, I2C_SMBUS_READ,
SSIF_IPMI_RESPONSE,
@ -540,6 +548,46 @@ static void retry_timeout(unsigned long data)
}
}
static void retry_timeout(unsigned long data)
{
struct ssif_info *ssif_info = (void *) data;
unsigned long oflags, *flags;
bool waiting;
if (ssif_info->stopping)
return;
flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
waiting = ssif_info->waiting_alert;
ssif_info->waiting_alert = false;
ipmi_ssif_unlock_cond(ssif_info, flags);
if (waiting)
start_get(ssif_info);
}
static void ssif_alert(struct i2c_client *client, unsigned int data)
{
struct ssif_info *ssif_info = i2c_get_clientdata(client);
unsigned long oflags, *flags;
bool do_get = false;
ssif_inc_stat(ssif_info, alerts);
flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
if (ssif_info->waiting_alert) {
ssif_info->waiting_alert = false;
del_timer(&ssif_info->retry_timer);
do_get = true;
} else if (ssif_info->curr_msg) {
ssif_info->got_alert = true;
}
ipmi_ssif_unlock_cond(ssif_info, flags);
if (do_get)
start_get(ssif_info);
}
static int start_resend(struct ssif_info *ssif_info);
static void msg_done_handler(struct ssif_info *ssif_info, int result,
@ -559,9 +607,12 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
if (ssif_info->retries_left > 0) {
ssif_inc_stat(ssif_info, receive_retries);
flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
ssif_info->waiting_alert = true;
ssif_info->rtc_us_timer = SSIF_MSG_USEC;
mod_timer(&ssif_info->retry_timer,
jiffies + SSIF_MSG_JIFFIES);
ssif_info->rtc_us_timer = SSIF_MSG_USEC;
ipmi_ssif_unlock_cond(ssif_info, flags);
return;
}
@ -581,9 +632,9 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
ssif_inc_stat(ssif_info, received_message_parts);
/* Remove the multi-part read marker. */
for (i = 0; i < (len-2); i++)
ssif_info->data[i] = data[i+2];
len -= 2;
for (i = 0; i < len; i++)
ssif_info->data[i] = data[i+2];
ssif_info->multi_len = len;
ssif_info->multi_pos = 1;
@ -610,9 +661,9 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
goto continue_op;
}
blocknum = data[ssif_info->multi_len];
blocknum = data[0];
if (ssif_info->multi_len+len-1 > IPMI_MAX_MSG_LENGTH) {
if (ssif_info->multi_len + len - 1 > IPMI_MAX_MSG_LENGTH) {
/* Received message too big, abort the operation. */
result = -E2BIG;
if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
@ -622,15 +673,15 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
}
/* Remove the blocknum from the data. */
for (i = 0; i < (len-1); i++)
ssif_info->data[i+ssif_info->multi_len] = data[i+1];
len--;
for (i = 0; i < len; i++)
ssif_info->data[i + ssif_info->multi_len] = data[i + 1];
ssif_info->multi_len += len;
if (blocknum == 0xff) {
/* End of read */
len = ssif_info->multi_len;
data = ssif_info->data;
} else if ((blocknum+1) != ssif_info->multi_pos) {
} else if (blocknum + 1 != ssif_info->multi_pos) {
/*
* Out of sequence block, just abort. Block
* numbers start at zero for the second block,
@ -650,7 +701,7 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
if (rv < 0) {
if (ssif_info->ssif_debug & SSIF_DEBUG_MSG)
pr_info(PFX
"Error from i2c_non_blocking_op(2)\n");
"Error from ssif_i2c_send\n");
result = -EIO;
} else
@ -830,7 +881,11 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result,
}
if (ssif_info->multi_data) {
/* In the middle of a multi-data write. */
/*
* In the middle of a multi-data write. See the comment
* in the SSIF_MULTI_n_PART case in the probe function
* for details on the intricacies of this.
*/
int left;
ssif_inc_stat(ssif_info, sent_messages_parts);
@ -864,15 +919,32 @@ static void msg_written_handler(struct ssif_info *ssif_info, int result,
msg_done_handler(ssif_info, -EIO, NULL, 0);
}
} else {
unsigned long oflags, *flags;
bool got_alert;
ssif_inc_stat(ssif_info, sent_messages);
ssif_inc_stat(ssif_info, sent_messages_parts);
/* Wait a jiffie then request the next message */
ssif_info->retries_left = SSIF_RECV_RETRIES;
ssif_info->rtc_us_timer = SSIF_MSG_PART_USEC;
mod_timer(&ssif_info->retry_timer,
jiffies + SSIF_MSG_PART_JIFFIES);
return;
flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
got_alert = ssif_info->got_alert;
if (got_alert) {
ssif_info->got_alert = false;
ssif_info->waiting_alert = false;
}
if (got_alert) {
ipmi_ssif_unlock_cond(ssif_info, flags);
/* The alert already happened, try now. */
retry_timeout((unsigned long) ssif_info);
} else {
/* Wait a jiffie then request the next message */
ssif_info->waiting_alert = true;
ssif_info->retries_left = SSIF_RECV_RETRIES;
ssif_info->rtc_us_timer = SSIF_MSG_PART_USEC;
mod_timer(&ssif_info->retry_timer,
jiffies + SSIF_MSG_PART_JIFFIES);
ipmi_ssif_unlock_cond(ssif_info, flags);
}
}
}
@ -881,6 +953,8 @@ static int start_resend(struct ssif_info *ssif_info)
int rv;
int command;
ssif_info->got_alert = false;
if (ssif_info->data_len > 32) {
command = SSIF_IPMI_MULTI_PART_REQUEST_START;
ssif_info->multi_data = ssif_info->data;
@ -915,7 +989,7 @@ static int start_send(struct ssif_info *ssif_info,
return -E2BIG;
ssif_info->retries_left = SSIF_SEND_RETRIES;
memcpy(ssif_info->data+1, data, len);
memcpy(ssif_info->data + 1, data, len);
ssif_info->data_len = len;
return start_resend(ssif_info);
}
@ -1200,7 +1274,7 @@ static int smi_type_proc_show(struct seq_file *m, void *v)
{
seq_puts(m, "ssif\n");
return seq_has_overflowed(m);
return 0;
}
static int smi_type_proc_open(struct inode *inode, struct file *file)
@ -1243,6 +1317,8 @@ static int smi_stats_proc_show(struct seq_file *m, void *v)
ssif_get_stat(ssif_info, events));
seq_printf(m, "watchdog_pretimeouts: %u\n",
ssif_get_stat(ssif_info, watchdog_pretimeouts));
seq_printf(m, "alerts: %u\n",
ssif_get_stat(ssif_info, alerts));
return 0;
}
@ -1258,6 +1334,23 @@ static const struct file_operations smi_stats_proc_ops = {
.release = single_release,
};
static int strcmp_nospace(char *s1, char *s2)
{
while (*s1 && *s2) {
while (isspace(*s1))
s1++;
while (isspace(*s2))
s2++;
if (*s1 > *s2)
return 1;
if (*s1 < *s2)
return -1;
s1++;
s2++;
}
return 0;
}
static struct ssif_addr_info *ssif_info_find(unsigned short addr,
char *adapter_name,
bool match_null_name)
@ -1272,8 +1365,10 @@ restart:
/* One is NULL and one is not */
continue;
}
if (strcmp(info->adapter_name, adapter_name))
/* Names to not match */
if (adapter_name &&
strcmp_nospace(info->adapter_name,
adapter_name))
/* Names do not match */
continue;
}
found = info;
@ -1306,6 +1401,12 @@ static bool check_acpi(struct ssif_info *ssif_info, struct device *dev)
return false;
}
/*
* Global enables we care about.
*/
#define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
IPMI_BMC_EVT_MSG_INTR)
static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
unsigned char msg[3];
@ -1391,13 +1492,33 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
break;
case SSIF_MULTI_2_PART:
if (ssif_info->max_xmit_msg_size > 64)
ssif_info->max_xmit_msg_size = 64;
if (ssif_info->max_xmit_msg_size > 63)
ssif_info->max_xmit_msg_size = 63;
if (ssif_info->max_recv_msg_size > 62)
ssif_info->max_recv_msg_size = 62;
break;
case SSIF_MULTI_n_PART:
/*
* The specification is rather confusing at
* this point, but I think I understand what
* is meant. At least I have a workable
* solution. With multi-part messages, you
* cannot send a message that is a multiple of
* 32-bytes in length, because the start and
* middle messages are 32-bytes and the end
* message must be at least one byte. You
* can't fudge on an extra byte, that would
* screw up things like fru data writes. So
* we limit the length to 63 bytes. That way
* a 32-byte message gets sent as a single
* part. A larger message will be a 32-byte
* start and the next message is always going
* to be 1-31 bytes in length. Not ideal, but
* it should work.
*/
if (ssif_info->max_xmit_msg_size > 63)
ssif_info->max_xmit_msg_size = 63;
break;
default:
@ -1407,7 +1528,7 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
} else {
no_support:
/* Assume no multi-part or PEC support */
pr_info(PFX "Error fetching SSIF: %d %d %2.2x, your system probably doesn't support this command so using defaults\n",
pr_info(PFX "Error fetching SSIF: %d %d %2.2x, your system probably doesn't support this command so using defaults\n",
rv, len, resp[2]);
ssif_info->max_xmit_msg_size = 32;
@ -1436,6 +1557,8 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
goto found;
}
ssif_info->global_enables = resp[3];
if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) {
ssif_info->has_event_buffer = true;
/* buffer is already enabled, nothing to do. */
@ -1444,18 +1567,37 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
msg[2] = ssif_info->global_enables | IPMI_BMC_EVT_MSG_BUFF;
rv = do_cmd(client, 3, msg, &len, resp);
if (rv || (len < 2)) {
pr_warn(PFX "Error getting global enables: %d %d %2.2x\n",
pr_warn(PFX "Error setting global enables: %d %d %2.2x\n",
rv, len, resp[2]);
rv = 0; /* Not fatal */
goto found;
}
if (resp[2] == 0)
if (resp[2] == 0) {
/* A successful return means the event buffer is supported. */
ssif_info->has_event_buffer = true;
ssif_info->global_enables |= IPMI_BMC_EVT_MSG_BUFF;
}
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;
rv = do_cmd(client, 3, msg, &len, resp);
if (rv || (len < 2)) {
pr_warn(PFX "Error setting global enables: %d %d %2.2x\n",
rv, len, resp[2]);
rv = 0; /* Not fatal */
goto found;
}
if (resp[2] == 0) {
/* A successful return means the alert is supported. */
ssif_info->supports_alert = true;
ssif_info->global_enables |= IPMI_BMC_RCV_MSG_INTR;
}
found:
ssif_info->intf_num = atomic_inc_return(&next_intf);
@ -1813,6 +1955,7 @@ static struct i2c_driver ssif_i2c_driver = {
},
.probe = ssif_probe,
.remove = ssif_remove,
.alert = ssif_alert,
.id_table = ssif_id,
.detect = ssif_detect
};
@ -1832,7 +1975,7 @@ static int init_ipmi_ssif(void)
rv = new_ssif_client(addr[i], adapter_name[i],
dbg[i], slave_addrs[i],
SI_HARDCODED);
if (!rv)
if (rv)
pr_err(PFX
"Couldn't add hardcoded device at addr 0x%x\n",
addr[i]);