i965: Replace maxBatchSize variable with BATCH_SZ define.

maxBatchSize was only ever initialized to BATCH_SZ, and a few places
used BATCH_SZ directly anyway.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>

src/mesa/drivers/dri/i965/intel_batchbuffer.c

@@ -71,7 +71,7 @@ intel_batchbuffer_init(struct intel_context *intel)
    }
 
    if (!intel->has_llc) {
-      intel->batch.cpu_map = malloc(intel->maxBatchSize);
+      intel->batch.cpu_map = malloc(BATCH_SZ);
       intel->batch.map = intel->batch.cpu_map;
    }
 }
@@ -88,7 +88,7 @@ intel_batchbuffer_reset(struct intel_context *intel)
    clear_cache(intel);
 
    intel->batch.bo = drm_intel_bo_alloc(intel->bufmgr, "batchbuffer",
-					intel->maxBatchSize, 4096);
+					BATCH_SZ, 4096);
    if (intel->has_llc) {
       drm_intel_bo_map(intel->batch.bo, true);
       intel->batch.map = intel->batch.bo->virtual;

src/mesa/drivers/dri/i965/intel_batchbuffer.h

@@ -111,7 +111,7 @@ intel_batchbuffer_require_space(struct intel_context *intel,
    intel->batch.is_blit = is_blit;
 
 #ifdef DEBUG
-   assert(sz < intel->maxBatchSize - BATCH_RESERVED);
+   assert(sz < BATCH_SZ - BATCH_RESERVED);
 #endif
    if (intel_batchbuffer_space(intel) < sz)
       intel_batchbuffer_flush(intel);

src/mesa/drivers/dri/i965/intel_context.c

@@ -510,7 +510,6 @@ intelInitContext(struct intel_context *intel,
 
    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
                        sPriv->myNum, "i965");
-   intel->maxBatchSize = BATCH_SZ;
 
    /* Estimate the size of the mappable aperture into the GTT.  There's an
     * ioctl to get the whole GTT size, but not one to get the mappable subset.

src/mesa/drivers/dri/i965/intel_context.h

@@ -155,7 +155,6 @@ struct intel_context
    GLuint NewGLState;
  
    dri_bufmgr *bufmgr;
-   unsigned int maxBatchSize;
 
    /**
     * Generation number of the hardware: 2 is 8xx, 3 is 9xx pre-965, 4 is 965.