diff options
| author | Jack Steiner <steiner@sgi.com> | 2009-06-18 03:28:28 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-19 00:04:02 +0400 |
| commit | 1a2c09e3b41e334b6651d53b39cfe8ceefbc45f8 (patch) | |
| tree | f005fcb5c5251256767b15f4a23ee220e6de5c88 /drivers/misc/sgi-gru/grukservices.c | |
| parent | 270952a907220c0331fdaecbb55df892921c5e2d (diff) | |
| download | linux-1a2c09e3b41e334b6651d53b39cfe8ceefbc45f8.tar.xz | |
gru: fix cache coherency issues with instruction retry
Fix two problems related to GRU instruction failures. Cache coherency is
not maintained for CBEs except when loading or unloading contexts. When
reading a CBE to extract error information, the CBE must first be flushed
from the cache.
The function that reads kerrnel CBEs was reading the wrong CBE.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grukservices.c')
| -rw-r--r-- | drivers/misc/sgi-gru/grukservices.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c index ba6fcd963f30..7586b89fd0d3 100644 --- a/drivers/misc/sgi-gru/grukservices.c +++ b/drivers/misc/sgi-gru/grukservices.c @@ -98,6 +98,9 @@ #define ASYNC_HAN_TO_BID(h) ((h) - 1) #define ASYNC_BID_TO_HAN(b) ((b) + 1) #define ASYNC_HAN_TO_BS(h) gru_base[ASYNC_HAN_TO_BID(h)] +#define KCB_TO_GID(cb) ((cb - gru_start_vaddr) / \ + (GRU_SIZE * GRU_CHIPLETS_PER_BLADE)) +#define KCB_TO_BS(cb) gru_base[KCB_TO_GID(cb)] #define GRU_NUM_KERNEL_CBR 1 #define GRU_NUM_KERNEL_DSR_BYTES 256 @@ -354,14 +357,19 @@ int gru_get_cb_exception_detail(void *cb, struct control_block_extended_exc_detail *excdet) { struct gru_control_block_extended *cbe; + struct gru_blade_state *bs; + int cbrnum; - cbe = get_cbe(GRUBASE(cb), get_cb_number(cb)); - prefetchw(cbe); /* Harmless on hardware, required for emulator */ + bs = KCB_TO_BS(cb); + cbrnum = thread_cbr_number(bs->bs_kgts, get_cb_number(cb)); + cbe = get_cbe(GRUBASE(cb), cbrnum); + gru_flush_cache(cbe); /* CBE not coherent */ excdet->opc = cbe->opccpy; excdet->exopc = cbe->exopccpy; excdet->ecause = cbe->ecause; excdet->exceptdet0 = cbe->idef1upd; excdet->exceptdet1 = cbe->idef3upd; + gru_flush_cache(cbe); return 0; } |