From: Jack Steiner Improve error messages for malfunctioning GRUs. Identify the type of instruction that is failing. Signed-off-by: Jack Steiner --- drivers/misc/sgi-gru/gruhandles.c | 22 +++++++++++++++++++--- drivers/misc/sgi-gru/gruhandles.h | 6 ++++++ 2 files changed, 25 insertions(+), 3 deletions(-) Index: linux/drivers/misc/sgi-gru/gruhandles.c =================================================================== --- linux.orig/drivers/misc/sgi-gru/gruhandles.c 2009-11-20 09:32:14.000000000 -0600 +++ linux/drivers/misc/sgi-gru/gruhandles.c 2009-11-20 09:32:30.000000000 -0600 @@ -54,6 +54,21 @@ static void start_instruction(void *h) gru_flush_cache(h); } +static void report_instruction_timeout(void *h) +{ + unsigned long goff = GSEGPOFF((unsigned long)h); + char *id = "???"; + + if (TYPE_IS(CCH, goff)) + id = "CCH"; + else if (TYPE_IS(TGH, goff)) + id = "TGH"; + else if (TYPE_IS(TFH, goff)) + id = "TFH"; + + panic(KERN_ALERT "GRU %p (%s) is malfunctioning\n", h, id); +} + static int wait_instruction_complete(void *h, enum mcs_op opc) { int status; @@ -64,9 +79,10 @@ static int wait_instruction_complete(voi status = GET_MSEG_HANDLE_STATUS(h); if (status != CCHSTATUS_ACTIVE) break; - if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time)) - panic("GRU %p is malfunctioning: start %ld, end %ld\n", - h, start_time, (unsigned long)get_cycles()); + if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time)) { + report_instruction_timeout(h); + start_time = get_cycles(); + } } if (gru_options & OPT_STATS) update_mcs_stats(opc, get_cycles() - start_time); Index: linux/drivers/misc/sgi-gru/gruhandles.h =================================================================== --- linux.orig/drivers/misc/sgi-gru/gruhandles.h 2009-11-20 09:32:14.000000000 -0600 +++ linux/drivers/misc/sgi-gru/gruhandles.h 2009-11-20 09:32:30.000000000 -0600 @@ -91,6 +91,12 @@ /* Convert an arbitrary handle address to the beginning of the GRU segment */ #define GRUBASE(h) ((void *)((unsigned long)(h) & ~(GRU_SIZE - 1))) +/* Test a valid handle address to determine the type */ +#define TYPE_IS(hn, h) ((h) >= GRU_##hn##_BASE && (h) < \ + GRU_##hn##_BASE + GRU_NUM_##hn * GRU_HANDLE_STRIDE && \ + (((h) & (GRU_HANDLE_STRIDE - 1)) == 0)) + + /* General addressing macros. */ static inline void *get_gseg_base_address(void *base, int ctxnum) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/