gru: add user request to specify gru slice

Add a user request to specify the gru instruction slice parameter for user
contexts.

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>

diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index b894b7e..1ad360c 100644 (file)
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -769,6 +769,10 @@ int gru_set_context_option(unsigned long arg)
                /* Register the current task as the GSEG owner */
                gts->ts_tgid_owner = current->tgid;
                break;
+       case sco_cch_req_slice:
+               /* Set the CCH slice option */
+               gts->ts_cch_req_slice = req.val1 & 3;
+               break;
        default:
                ret = -EINVAL;
        }

diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
index 8615b90..a484a9f 100644 (file)
--- a/drivers/misc/sgi-gru/grulib.h
+++ b/drivers/misc/sgi-gru/grulib.h
@@ -98,7 +98,7 @@ struct gru_unload_context_req {
 /*
  * Structure used to set context options
  */
-enum {sco_gseg_owner};
+enum {sco_gseg_owner, sco_cch_req_slice};
 struct gru_set_context_option_req {
        unsigned long   gseg;
        int             op;

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 347004e..0c20be0 100644 (file)
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -321,6 +321,7 @@ struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
        gts->ts_tsid = tsid;
        gts->ts_ctxnum = NULLCTX;
        gts->ts_tlb_int_select = -1;
+       gts->ts_cch_req_slice = -1;
        gts->ts_sizeavail = GRU_SIZEAVAIL(PAGE_SHIFT);
        if (vma) {
                gts->ts_mm = current->mm;
@@ -566,6 +567,12 @@ void gru_load_context(struct gru_thread_state *gts)
                gts->ts_tlb_int_select = gru_cpu_fault_map_id();
                cch->tlb_int_select = gts->ts_tlb_int_select;
        }
+       if (gts->ts_cch_req_slice >= 0) {
+               cch->req_slice_set_enable = 1;
+               cch->req_slice = gts->ts_cch_req_slice;
+       } else {
+               cch->req_slice_set_enable =0;
+       }
        cch->tfm_done_bit_enable = 0;
        cch->dsr_allocation_map = gts->ts_dsr_map;
        cch->cbr_allocation_map = gts->ts_cbr_map;

diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index ee2f412..34ab3d4 100644 (file)
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -380,6 +380,7 @@ struct gru_thread_state {
                                                   required for contest */
        unsigned char           ts_cbr_au_count;/* Number of CBR resources
                                                   required for contest */
+       char                    ts_cch_req_slice;/* CCH packet slice */
        char                    ts_blade;       /* If >= 0, migrate context if
                                                   ref from diferent blade */
        char                    ts_force_cch_reload;