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gru: support cch_allocate for kernel threads

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Change the interface to cch_allocate so that it can be used to allocate
GRU contexts for kernel threads.  Kernel threads use the GRU in unmapped
mode and do not require ASIDs for the GRU TLB.

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>
This commit is contained in:
Jack Steiner 2009-06-17 16:28:21 -07:00 committed by Linus Torvalds
parent d57c82b107
commit 6e9100741c
4 changed files with 17 additions and 19 deletions
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12
drivers/misc/sgi-gru/gruhandles.c
View file

@ -72,18 +72,8 @@ static int wait_instruction_complete(void *h, enum mcs_op opc)
return status;
}
int cch_allocate(struct gru_context_configuration_handle *cch,
int asidval, int sizeavail, unsigned long cbrmap,
unsigned long dsrmap)
int cch_allocate(struct gru_context_configuration_handle *cch)
{
int i;
for (i = 0; i < 8; i++) {
cch->asid[i] = (asidval++);
cch->sizeavail[i] = sizeavail;
}
cch->dsr_allocation_map = dsrmap;
cch->cbr_allocation_map = cbrmap;
cch->opc = CCHOP_ALLOCATE;
start_instruction(cch);
return wait_instruction_complete(cch, cchop_allocate);

4
drivers/misc/sgi-gru/gruhandles.h
View file

@ -480,9 +480,7 @@ enum gru_cbr_state {
/* minimum TLB purge count to ensure a full purge */
#define GRUMAXINVAL 1024UL
int cch_allocate(struct gru_context_configuration_handle *cch,
int asidval, int sizeavail, unsigned long cbrmap, unsigned long dsrmap);
int cch_allocate(struct gru_context_configuration_handle *cch);
int cch_start(struct gru_context_configuration_handle *cch);
int cch_interrupt(struct gru_context_configuration_handle *cch);
int cch_deallocate(struct gru_context_configuration_handle *cch);

5
drivers/misc/sgi-gru/grukservices.c
View file

@ -672,7 +672,10 @@ int gru_kservices_init(struct gru_state *gru)
cch->tlb_int_enable = 0;
cch->tfm_done_bit_enable = 0;
cch->unmap_enable = 1;
err = cch_allocate(cch, 0, 0, cbr_map, dsr_map);
cch->dsr_allocation_map = dsr_map;
cch->cbr_allocation_map = cbr_map;
err = cch_allocate(cch);
if (err) {
gru_dbg(grudev,
"Unable to allocate kernel CCH: gid %d, err %d\n",

15
drivers/misc/sgi-gru/grumain.c
View file

@ -537,13 +537,12 @@ void gru_load_context(struct gru_thread_state *gts)
{
struct gru_state *gru = gts->ts_gru;
struct gru_context_configuration_handle *cch;
int err, asid, ctxnum = gts->ts_ctxnum;
int i, err, asid, ctxnum = gts->ts_ctxnum;
gru_dbg(grudev, "gts %p\n", gts);
cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
lock_cch_handle(cch);
asid = gru_load_mm_tracker(gru, gts);
cch->tfm_fault_bit_enable =
(gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
|| gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
@ -553,8 +552,16 @@ void gru_load_context(struct gru_thread_state *gts)
cch->tlb_int_select = gts->ts_tlb_int_select;
}
cch->tfm_done_bit_enable = 0;
err = cch_allocate(cch, asid, gts->ts_sizeavail, gts->ts_cbr_map,
gts->ts_dsr_map);
cch->dsr_allocation_map = gts->ts_dsr_map;
cch->cbr_allocation_map = gts->ts_cbr_map;
asid = gru_load_mm_tracker(gru, gts);
cch->unmap_enable = 0;
for (i = 0; i < 8; i++) {
cch->asid[i] = asid + i;
cch->sizeavail[i] = gts->ts_sizeavail;
}
err = cch_allocate(cch);
if (err) {
gru_dbg(grudev,
"err %d: cch %p, gts %p, cbr 0x%lx, dsr 0x%lx\n",