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-rw-r--r--drivers/misc/sgi-gru/grumain.c60
-rw-r--r--drivers/misc/sgi-gru/grutables.h2
2 files changed, 33 insertions, 29 deletions
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 374af38862e..14baabc79da 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -299,15 +299,13 @@ static struct gru_thread_state *gru_find_current_gts_nolock(struct gru_vma_data
/*
* Allocate a thread state structure.
*/
-static struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
- struct gru_vma_data *vdata,
- int tsid)
+struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
+ int cbr_au_count, int dsr_au_count, int options, int tsid)
{
struct gru_thread_state *gts;
int bytes;
- bytes = DSR_BYTES(vdata->vd_dsr_au_count) +
- CBR_BYTES(vdata->vd_cbr_au_count);
+ bytes = DSR_BYTES(dsr_au_count) + CBR_BYTES(cbr_au_count);
bytes += sizeof(struct gru_thread_state);
gts = kzalloc(bytes, GFP_KERNEL);
if (!gts)
@@ -316,21 +314,22 @@ static struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
STAT(gts_alloc);
atomic_set(&gts->ts_refcnt, 1);
mutex_init(&gts->ts_ctxlock);
- gts->ts_cbr_au_count = vdata->vd_cbr_au_count;
- gts->ts_dsr_au_count = vdata->vd_dsr_au_count;
- gts->ts_user_options = vdata->vd_user_options;
+ gts->ts_cbr_au_count = cbr_au_count;
+ gts->ts_dsr_au_count = dsr_au_count;
+ gts->ts_user_options = options;
gts->ts_tsid = tsid;
- gts->ts_user_options = vdata->vd_user_options;
gts->ts_ctxnum = NULLCTX;
- gts->ts_mm = current->mm;
- gts->ts_vma = vma;
gts->ts_tlb_int_select = -1;
- gts->ts_gms = gru_register_mmu_notifier();
gts->ts_sizeavail = GRU_SIZEAVAIL(PAGE_SHIFT);
- if (!gts->ts_gms)
- goto err;
+ if (vma) {
+ gts->ts_mm = current->mm;
+ gts->ts_vma = vma;
+ gts->ts_gms = gru_register_mmu_notifier();
+ if (!gts->ts_gms)
+ goto err;
+ }
- gru_dbg(grudev, "alloc vdata %p, new gts %p\n", vdata, gts);
+ gru_dbg(grudev, "alloc gts %p\n", gts);
return gts;
err:
@@ -381,7 +380,8 @@ struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct *vma,
struct gru_vma_data *vdata = vma->vm_private_data;
struct gru_thread_state *gts, *ngts;
- gts = gru_alloc_gts(vma, vdata, tsid);
+ gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count, vdata->vd_dsr_au_count,
+ vdata->vd_user_options, tsid);
if (!gts)
return NULL;
@@ -645,7 +645,7 @@ static int gru_retarget_intr(struct gru_thread_state *gts)
#define next_gru(b, g) (((g) < &(b)->bs_grus[GRU_CHIPLETS_PER_BLADE - 1]) ? \
((g)+1) : &(b)->bs_grus[0])
-static void gru_steal_context(struct gru_thread_state *gts)
+static void gru_steal_context(struct gru_thread_state *gts, int blade_id)
{
struct gru_blade_state *blade;
struct gru_state *gru, *gru0;
@@ -655,8 +655,7 @@ static void gru_steal_context(struct gru_thread_state *gts)
cbr = gts->ts_cbr_au_count;
dsr = gts->ts_dsr_au_count;
- preempt_disable();
- blade = gru_base[uv_numa_blade_id()];
+ blade = gru_base[blade_id];
spin_lock(&blade->bs_lock);
ctxnum = next_ctxnum(blade->bs_lru_ctxnum);
@@ -693,7 +692,6 @@ static void gru_steal_context(struct gru_thread_state *gts)
blade->bs_lru_gru = gru;
blade->bs_lru_ctxnum = ctxnum;
spin_unlock(&blade->bs_lock);
- preempt_enable();
if (ngts) {
STAT(steal_context);
@@ -713,17 +711,17 @@ static void gru_steal_context(struct gru_thread_state *gts)
/*
* Scan the GRUs on the local blade & assign a GRU context.
*/
-static struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts)
+static struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts,
+ int blade)
{
struct gru_state *gru, *grux;
int i, max_active_contexts;
- preempt_disable();
again:
gru = NULL;
max_active_contexts = GRU_NUM_CCH;
- for_each_gru_on_blade(grux, uv_numa_blade_id(), i) {
+ for_each_gru_on_blade(grux, blade, i) {
if (check_gru_resources(grux, gts->ts_cbr_au_count,
gts->ts_dsr_au_count,
max_active_contexts)) {
@@ -763,7 +761,6 @@ again:
STAT(assign_context_failed);
}
- preempt_enable();
return gru;
}
@@ -778,6 +775,7 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct gru_thread_state *gts;
unsigned long paddr, vaddr;
+ int blade_id;
vaddr = (unsigned long)vmf->virtual_address;
gru_dbg(grudev, "vma %p, vaddr 0x%lx (0x%lx)\n",
@@ -792,8 +790,10 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
again:
mutex_lock(&gts->ts_ctxlock);
preempt_disable();
+ blade_id = uv_numa_blade_id();
+
if (gts->ts_gru) {
- if (gts->ts_gru->gs_blade_id != uv_numa_blade_id()) {
+ if (gts->ts_gru->gs_blade_id != blade_id) {
STAT(migrated_nopfn_unload);
gru_unload_context(gts, 1);
} else {
@@ -803,12 +803,14 @@ again:
}
if (!gts->ts_gru) {
- if (!gru_assign_gru_context(gts)) {
- mutex_unlock(&gts->ts_ctxlock);
+ if (!gru_assign_gru_context(gts, blade_id)) {
preempt_enable();
+ mutex_unlock(&gts->ts_ctxlock);
+ set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(GRU_ASSIGN_DELAY); /* true hack ZZZ */
+ blade_id = uv_numa_blade_id();
if (gts->ts_steal_jiffies + GRU_STEAL_DELAY < jiffies)
- gru_steal_context(gts);
+ gru_steal_context(gts, blade_id);
goto again;
}
gru_load_context(gts);
@@ -818,8 +820,8 @@ again:
vma->vm_page_prot);
}
- mutex_unlock(&gts->ts_ctxlock);
preempt_enable();
+ mutex_unlock(&gts->ts_ctxlock);
return VM_FAULT_NOPAGE;
}
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index d768f54dc25..c69086c9b98 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -630,6 +630,8 @@ extern void gru_flush_all_tlb(struct gru_state *gru);
extern int gru_proc_init(void);
extern void gru_proc_exit(void);
+extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
+ int cbr_au_count, int dsr_au_count, int options, int tsid);
extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
int cbr_au_count, char *cbmap);
extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-27 17:17:29 +0000