--- zzzz-none-000/linux-4.1.38/arch/arm/mm/dma-mapping.c	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/arch/arm/mm/dma-mapping.c	2020-11-25 10:06:48.000000000 +0000
@@ -314,7 +314,7 @@
 			VM_ARM_DMA_CONSISTENT | VM_USERMAP);
 }
 
-#define DEFAULT_DMA_COHERENT_POOL_SIZE	SZ_256K
+#define DEFAULT_DMA_COHERENT_POOL_SIZE	SZ_1M
 static struct gen_pool *atomic_pool;
 
 static size_t atomic_pool_size = DEFAULT_DMA_COHERENT_POOL_SIZE;
@@ -371,7 +371,11 @@
 			goto destroy_genpool;
 
 		gen_pool_set_algo(atomic_pool,
+#if defined(CONFIG_BCM_KF_ARM_BCM963XX)
+				gen_pool_best_fit,
+#else
 				gen_pool_first_fit_order_align,
+#endif
 				(void *)PAGE_SHIFT);
 		pr_info("DMA: preallocated %zd KiB pool for atomic coherent allocations\n",
 		       atomic_pool_size / 1024);
@@ -594,6 +598,14 @@
 
 #endif	/* CONFIG_MMU */
 
+#if defined(CONFIG_BCM_KF_ARM_BCM963XX)
+static void dmac_flush_area(const void * addr, size_t len, int dir)
+{
+	dmac_flush_range(addr, addr + len);
+}
+
+#endif
+
 static void *__alloc_simple_buffer(struct device *dev, size_t size, gfp_t gfp,
 				   struct page **ret_page)
 {
@@ -629,7 +641,11 @@
 	if (!mask)
 		return NULL;
 
+#if defined(CONFIG_BCM_KF_ARM_BCM963XX) && defined(CONFIG_BCM_ZONE_ACP)
+	if ((mask < 0xffffffffULL) && !(gfp & GFP_ACP))
+#else
 	if (mask < 0xffffffffULL)
+#endif
 		gfp |= GFP_DMA;
 
 	/*
@@ -882,6 +898,29 @@
 	}
 }
 
+#if defined(CONFIG_BCM_KF_ARM_BCM963XX)
+void ___dma_page_cpu_to_dev_flush(struct page *page, unsigned long off,
+	size_t size, enum dma_data_direction dir)
+{
+#ifdef CONFIG_OUTER_CACHE
+	unsigned long paddr;
+
+	dma_cache_maint_page(page, off, size, dir, dmac_map_area);
+
+	paddr = page_to_phys(page) + off;
+	if (dir == DMA_FROM_DEVICE) {
+		outer_inv_range(paddr, paddr + size);
+	} else {
+		outer_flush_range(paddr, paddr + size);
+	}
+#endif
+
+	dma_cache_maint_page(page, off, size, dir, &dmac_flush_area);
+}
+EXPORT_SYMBOL(___dma_page_cpu_to_dev_flush);
+
+#endif
+
 /**
  * arm_dma_map_sg - map a set of SG buffers for streaming mode DMA
  * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices