drm/i915: Make define for lrc state offset

More often than not, we need a byte offset into lrc
register state from the start of the hw state. Make it so.
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200423182355.21837-3-mika.kuoppala@linux.intel.com

drivers/gpu/drm/i915/gt/intel_context_sseu.c

@@ -25,8 +25,7 @@ static int gen8_emit_rpcs_config(struct i915_request *rq,
 		return PTR_ERR(cs);
 
 	offset = i915_ggtt_offset(ce->state) +
-		 LRC_STATE_PN * PAGE_SIZE +
-		 CTX_R_PWR_CLK_STATE * 4;
+		 LRC_STATE_OFFSET + CTX_R_PWR_CLK_STATE * 4;
 
 	*cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
 	*cs++ = lower_32_bits(offset);

drivers/gpu/drm/i915/gt/intel_lrc.c

@@ -1213,7 +1213,7 @@ static void restore_default_state(struct intel_context *ce,
 
 	if (engine->pinned_default_state)
 		memcpy(regs, /* skip restoring the vanilla PPHWSP */
-		       engine->pinned_default_state + LRC_STATE_PN * PAGE_SIZE,
+		       engine->pinned_default_state + LRC_STATE_OFFSET,
 		       engine->context_size - PAGE_SIZE);
 
 	execlists_init_reg_state(regs, ce, engine, ce->ring, false);
@@ -3169,7 +3169,7 @@ check_redzone(const void *vaddr, const struct intel_engine_cs *engine)
 
 static void execlists_context_unpin(struct intel_context *ce)
 {
-	check_redzone((void *)ce->lrc_reg_state - LRC_STATE_PN * PAGE_SIZE,
+	check_redzone((void *)ce->lrc_reg_state - LRC_STATE_OFFSET,
 		      ce->engine);
 
 	i915_gem_object_unpin_map(ce->state->obj);
@@ -3216,7 +3216,7 @@ __execlists_context_pin(struct intel_context *ce,
 		return PTR_ERR(vaddr);
 
 	ce->lrc_desc = lrc_descriptor(ce, engine) | CTX_DESC_FORCE_RESTORE;
-	ce->lrc_reg_state = vaddr + LRC_STATE_PN * PAGE_SIZE;
+	ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET;
 	__execlists_update_reg_state(ce, engine, ce->ring->tail);
 
 	return 0;
@@ -4866,7 +4866,7 @@ populate_lr_context(struct intel_context *ce,
 	 * The second page of the context object contains some registers which
 	 * must be set up prior to the first execution.
 	 */
-	execlists_init_reg_state(vaddr + LRC_STATE_PN * PAGE_SIZE,
+	execlists_init_reg_state(vaddr + LRC_STATE_OFFSET,
 				 ce, engine, ring, inhibit);
 
 	ret = 0;

drivers/gpu/drm/i915/gt/intel_lrc.h

@@ -90,6 +90,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine);
 #define LRC_PPHWSP_SZ	(1)
 /* After the PPHWSP we have the logical state for the context */
 #define LRC_STATE_PN	(LRC_PPHWSP_PN + LRC_PPHWSP_SZ)
+#define LRC_STATE_OFFSET (LRC_STATE_PN * PAGE_SIZE)
 
 /* Space within PPHWSP reserved to be used as scratch */
 #define LRC_PPHWSP_SCRATCH		0x34

drivers/gpu/drm/i915/gt/selftest_lrc.c

@@ -4458,7 +4458,7 @@ static int live_lrc_layout(void *arg)
 			err = PTR_ERR(hw);
 			break;
 		}
-		hw += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+		hw += LRC_STATE_OFFSET / sizeof(*hw);
 
 		execlists_init_reg_state(memset(lrc, POISON_INUSE, PAGE_SIZE),
 					 engine->kernel_context,
@@ -4626,7 +4626,7 @@ static int live_lrc_fixed(void *arg)
 			err = PTR_ERR(hw);
 			break;
 		}
-		hw += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+		hw += LRC_STATE_OFFSET / sizeof(*hw);
 
 		for (t = tbl; t->name; t++) {
 			int dw = find_offset(hw, t->reg);
@@ -5212,7 +5212,7 @@ store_context(struct intel_context *ce, struct i915_vma *scratch)
 	x = 0;
 	dw = 0;
 	hw = ce->engine->pinned_default_state;
-	hw += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
 		u32 len = hw[dw] & 0x7f;
 
@@ -5365,7 +5365,7 @@ static struct i915_vma *load_context(struct intel_context *ce, u32 poison)
 
 	dw = 0;
 	hw = ce->engine->pinned_default_state;
-	hw += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
 		u32 len = hw[dw] & 0x7f;
 
@@ -5489,12 +5489,12 @@ static int compare_isolation(struct intel_engine_cs *engine,
 		err = PTR_ERR(lrc);
 		goto err_B1;
 	}
-	lrc += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+	lrc += LRC_STATE_OFFSET / sizeof(*hw);
 
 	x = 0;
 	dw = 0;
 	hw = engine->pinned_default_state;
-	hw += LRC_STATE_PN * PAGE_SIZE / sizeof(*hw);
+	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
 		u32 len = hw[dw] & 0x7f;
 
@@ -5736,7 +5736,7 @@ static struct i915_request *garbage(struct intel_context *ce,
 	prandom_bytes_state(prng,
 			    ce->lrc_reg_state,
 			    ce->engine->context_size -
-			    LRC_STATE_PN * PAGE_SIZE);
+			    LRC_STATE_OFFSET);
 
 	rq = intel_context_create_request(ce);
 	if (IS_ERR(rq)) {

drivers/gpu/drm/i915/i915_perf.c

@@ -2098,7 +2098,7 @@ gen8_store_flex(struct i915_request *rq,
 	if (IS_ERR(cs))
 		return PTR_ERR(cs);
 
-	offset = i915_ggtt_offset(ce->state) + LRC_STATE_PN * PAGE_SIZE;
+	offset = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET;
 	do {
 		*cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
 		*cs++ = offset + flex->offset * sizeof(u32);