diff options
| -rw-r--r-- | drivers/misc/sgi-gru/grufault.c | 49 |
1 files changed, 20 insertions, 29 deletions
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c index 2605edfbaebe..a9f0cf483005 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -122,22 +122,11 @@ static void gru_unlock_gts(struct gru_thread_state *gts) * is necessary to prevent the user from seeing a stale cb.istatus that will * change as soon as the TFH restart is complete. Races may cause an * occasional failure to clear the cb.istatus, but that is ok. - * - * If the cb address is not valid (should not happen, but...), nothing - * bad will happen.. The get_user()/put_user() will fail but there - * are no bad side-effects. */ -static void gru_cb_set_istatus_active(unsigned long __user *cb) +static void gru_cb_set_istatus_active(struct gru_instruction_bits *cbk) { - union { - struct gru_instruction_bits bits; - unsigned long dw; - } u; - - if (cb) { - get_user(u.dw, cb); - u.bits.istatus = CBS_ACTIVE; - put_user(u.dw, cb); + if (cbk) { + cbk->istatus = CBS_ACTIVE; } } @@ -322,9 +311,9 @@ upm: */ static int gru_try_dropin(struct gru_thread_state *gts, struct gru_tlb_fault_handle *tfh, - unsigned long __user *cb) + struct gru_instruction_bits *cbk) { - int pageshift = 0, asid, write, ret, atomic = !cb; + int pageshift = 0, asid, write, ret, atomic = !cbk; unsigned long gpa = 0, vaddr = 0; /* @@ -347,7 +336,7 @@ static int gru_try_dropin(struct gru_thread_state *gts, } if (tfh->state == TFHSTATE_IDLE) goto failidle; - if (tfh->state == TFHSTATE_MISS_FMM && cb) + if (tfh->state == TFHSTATE_MISS_FMM && cbk) goto failfmm; write = (tfh->cause & TFHCAUSE_TLB_MOD) != 0; @@ -378,7 +367,7 @@ static int gru_try_dropin(struct gru_thread_state *gts, goto failupm; } } - gru_cb_set_istatus_active(cb); + gru_cb_set_istatus_active(cbk); tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write, GRU_PAGESIZE(pageshift)); STAT(tlb_dropin); @@ -392,7 +381,7 @@ failnoasid: /* No asid (delayed unload). */ STAT(tlb_dropin_fail_no_asid); gru_dbg(grudev, "FAILED no_asid tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr); - if (!cb) + if (!cbk) tfh_user_polling_mode(tfh); else gru_flush_cache(tfh); @@ -415,17 +404,18 @@ failfmm: failnoexception: /* TFH status did not show exception pending */ gru_flush_cache(tfh); - if (cb) - gru_flush_cache(cb); + if (cbk) + gru_flush_cache(cbk); STAT(tlb_dropin_fail_no_exception); - gru_dbg(grudev, "FAILED non-exception tfh: 0x%p, status %d, state %d\n", tfh, tfh->status, tfh->state); + gru_dbg(grudev, "FAILED non-exception tfh: 0x%p, status %d, state %d\n", + tfh, tfh->status, tfh->state); return 0; failidle: /* TFH state was idle - no miss pending */ gru_flush_cache(tfh); - if (cb) - gru_flush_cache(cb); + if (cbk) + gru_flush_cache(cbk); STAT(tlb_dropin_fail_idle); gru_dbg(grudev, "FAILED idle tfh: 0x%p, state %d\n", tfh, tfh->state); return 0; @@ -439,7 +429,7 @@ failinval: failactive: /* Range invalidate active. Switch to UPM iff atomic */ - if (!cb) + if (!cbk) tfh_user_polling_mode(tfh); else gru_flush_cache(tfh); @@ -512,7 +502,7 @@ irqreturn_t gru_intr(int irq, void *dev_id) static int gru_user_dropin(struct gru_thread_state *gts, struct gru_tlb_fault_handle *tfh, - unsigned long __user *cb) + void *cb) { struct gru_mm_struct *gms = gts->ts_gms; int ret; @@ -538,7 +528,7 @@ int gru_handle_user_call_os(unsigned long cb) { struct gru_tlb_fault_handle *tfh; struct gru_thread_state *gts; - unsigned long __user *cbp; + void *cbk; int ucbnum, cbrnum, ret = -EINVAL; STAT(call_os); @@ -548,7 +538,6 @@ int gru_handle_user_call_os(unsigned long cb) ucbnum = get_cb_number((void *)cb); if ((cb & (GRU_HANDLE_STRIDE - 1)) || ucbnum >= GRU_NUM_CB) return -EINVAL; - cbp = (unsigned long *)cb; gts = gru_find_lock_gts(cb); if (!gts) @@ -583,7 +572,9 @@ int gru_handle_user_call_os(unsigned long cb) gru_unload_context(gts, 1); } else if (gts->ts_gru) { tfh = get_tfh_by_index(gts->ts_gru, cbrnum); - ret = gru_user_dropin(gts, tfh, cbp); + cbk = get_gseg_base_address_cb(gts->ts_gru->gs_gru_base_vaddr, + gts->ts_ctxnum, ucbnum); + ret = gru_user_dropin(gts, tfh, cbk); } exit: gru_unlock_gts(gts); |