diff options
Diffstat (limited to 'drivers/char/ipmi/ipmi_bt_sm.c')
| -rw-r--r-- | drivers/char/ipmi/ipmi_bt_sm.c | 38 |
1 files changed, 15 insertions, 23 deletions
diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c index 33862670e28..58dcdee1cd7 100644 --- a/drivers/char/ipmi/ipmi_bt_sm.c +++ b/drivers/char/ipmi/ipmi_bt_sm.c @@ -28,6 +28,8 @@ #include <linux/kernel.h> /* For printk. */ #include <linux/string.h> +#include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/ipmi_msgdefs.h> /* for completion codes */ #include "ipmi_si_sm.h" @@ -36,6 +38,8 @@ static int bt_debug = 0x00; /* Production value 0, see following flags */ #define BT_DEBUG_ENABLE 1 #define BT_DEBUG_MSG 2 #define BT_DEBUG_STATES 4 +module_param(bt_debug, int, 0644); +MODULE_PARM_DESC(bt_debug, "debug bitmask, 1=enable, 2=messages, 4=states"); /* Typical "Get BT Capabilities" values are 2-3 retries, 5-10 seconds, and 64 byte buffers. However, one HP implementation wants 255 bytes of @@ -43,7 +47,7 @@ static int bt_debug = 0x00; /* Production value 0, see following flags */ Since the Open IPMI architecture is single-message oriented at this stage, the queue depth of BT is of no concern. */ -#define BT_NORMAL_TIMEOUT 2000000 /* seconds in microseconds */ +#define BT_NORMAL_TIMEOUT 5000000 /* seconds in microseconds */ #define BT_RETRY_LIMIT 2 #define BT_RESET_DELAY 6000000 /* 6 seconds after warm reset */ @@ -202,7 +206,7 @@ static int bt_get_result(struct si_sm_data *bt, msg_len = bt->read_count - 2; /* account for length & seq */ /* Always NetFn, Cmd, cCode */ if (msg_len < 3 || msg_len > IPMI_MAX_MSG_LENGTH) { - printk(KERN_WARNING "BT results: bad msg_len = %d\n", msg_len); + printk(KERN_DEBUG "BT results: bad msg_len = %d\n", msg_len); data[0] = bt->write_data[1] | 0x4; /* Kludge a response */ data[1] = bt->write_data[3]; data[2] = IPMI_ERR_UNSPECIFIED; @@ -240,7 +244,7 @@ static void reset_flags(struct si_sm_data *bt) BT_CONTROL(BT_B_BUSY); BT_CONTROL(BT_CLR_WR_PTR); BT_CONTROL(BT_SMS_ATN); -#ifdef DEVELOPMENT_ONLY_NOT_FOR_PRODUCTION + if (BT_STATUS & BT_B2H_ATN) { int i; BT_CONTROL(BT_H_BUSY); @@ -250,7 +254,6 @@ static void reset_flags(struct si_sm_data *bt) BMC2HOST; BT_CONTROL(BT_H_BUSY); } -#endif } static inline void write_all_bytes(struct si_sm_data *bt) @@ -295,7 +298,7 @@ static inline int read_all_bytes(struct si_sm_data *bt) printk ("\n"); } if (bt->seq != bt->write_data[2]) /* idiot check */ - printk(KERN_WARNING "BT: internal error: sequence mismatch\n"); + printk(KERN_DEBUG "BT: internal error: sequence mismatch\n"); /* per the spec, the (NetFn, Seq, Cmd) tuples should match */ if ((bt->read_data[3] == bt->write_data[3]) && /* Cmd */ @@ -321,18 +324,17 @@ static void error_recovery(struct si_sm_data *bt, char *reason) bt->timeout = BT_NORMAL_TIMEOUT; /* various places want to retry */ status = BT_STATUS; - printk(KERN_WARNING "BT: %s in %s %s ", reason, STATE2TXT, + printk(KERN_DEBUG "BT: %s in %s %s\n", reason, STATE2TXT, STATUS2TXT(buf)); (bt->error_retries)++; if (bt->error_retries > BT_RETRY_LIMIT) { - printk("retry limit (%d) exceeded\n", BT_RETRY_LIMIT); + printk(KERN_DEBUG "retry limit (%d) exceeded\n", BT_RETRY_LIMIT); bt->state = BT_STATE_HOSED; if (!bt->nonzero_status) printk(KERN_ERR "IPMI: BT stuck, try power cycle\n"); - else if (bt->seq == FIRST_SEQ + BT_RETRY_LIMIT) { - /* most likely during insmod */ - printk(KERN_WARNING "IPMI: BT reset (takes 5 secs)\n"); + else if (bt->error_retries <= BT_RETRY_LIMIT + 1) { + printk(KERN_DEBUG "IPMI: BT reset (takes 5 secs)\n"); bt->state = BT_STATE_RESET1; } return; @@ -340,11 +342,11 @@ static void error_recovery(struct si_sm_data *bt, char *reason) /* Sometimes the BMC queues get in an "off-by-one" state...*/ if ((bt->state == BT_STATE_B2H_WAIT) && (status & BT_B2H_ATN)) { - printk("retry B2H_WAIT\n"); + printk(KERN_DEBUG "retry B2H_WAIT\n"); return; } - printk("restart command\n"); + printk(KERN_DEBUG "restart command\n"); bt->state = BT_STATE_RESTART; } @@ -372,17 +374,6 @@ static enum si_sm_result bt_event(struct si_sm_data *bt, long time) return SI_SM_HOSED; if (bt->state != BT_STATE_IDLE) { /* do timeout test */ - - /* Certain states, on error conditions, can lock up a CPU - because they are effectively in an infinite loop with - CALL_WITHOUT_DELAY (right back here with time == 0). - Prevent infinite lockup by ALWAYS decrementing timeout. */ - - /* FIXME: bt_event is sometimes called with time > BT_NORMAL_TIMEOUT - (noticed in ipmi_smic_sm.c January 2004) */ - - if ((time <= 0) || (time >= BT_NORMAL_TIMEOUT)) - time = 100; bt->timeout -= time; if ((bt->timeout < 0) && (bt->state < BT_STATE_RESET1)) { error_recovery(bt, "timed out"); @@ -483,6 +474,7 @@ static enum si_sm_result bt_event(struct si_sm_data *bt, long time) break; case BT_STATE_RESTART: /* don't reset retries! */ + reset_flags(bt); bt->write_data[2] = ++bt->seq; bt->read_count = 0; bt->nonzero_status = 0; |