build/patch/kernel/media-current/00110-v91-irq-gic-v3-its.patch

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -45,6 +45,7 @@
 
 #define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING	(1 << 0)
 #define RDIST_FLAGS_RD_TABLES_PREALLOCATED	(1 << 1)
+#define RDIST_FLAGS_FORCE_NO_LOCAL_CACHE	(1 << 2)
 
 #define RD_LOCAL_LPI_ENABLED                    BIT(0)
 #define RD_LOCAL_PENDTABLE_PREALLOCATED         BIT(1)
@@ -2176,6 +2177,11 @@
 {
 	struct page *prop_page;
 
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE) {
+		pr_err("ITS ALLOCATE PROP WORKAROUND\n");
+		gfp_flags |= GFP_DMA;
+	}
+
 	prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ));
 	if (!prop_page)
 		return NULL;
@@ -2299,6 +2305,7 @@
 	u32 alloc_pages, psz;
 	struct page *page;
 	void *base;
+	gfp_t gfp_flags;
 
 	psz = baser->psz;
 	alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz);
@@ -2310,7 +2317,10 @@
 		order = get_order(GITS_BASER_PAGES_MAX * psz);
 	}
 
-	page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, order);
+	gfp_flags = GFP_KERNEL | __GFP_ZERO;
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+		gfp_flags |= GFP_DMA;
+	page = alloc_pages_node(its->numa_node, gfp_flags, order);
 	if (!page)
 		return -ENOMEM;
 
@@ -2356,6 +2366,13 @@
 
 	its_write_baser(its, baser, val);
 	tmp = baser->val;
+
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE) {
+		if (tmp & GITS_BASER_SHAREABILITY_MASK)
+			tmp &= ~GITS_BASER_SHAREABILITY_MASK;
+		else
+			gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order));
+	}
 
 	if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) {
 		/*
@@ -2939,6 +2956,10 @@
 {
 	struct page *pend_page;
 
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE) {
+		gfp_flags |= GFP_DMA;
+	}
+
 	pend_page = alloc_pages(gfp_flags | __GFP_ZERO,
 				get_order(LPI_PENDBASE_SZ));
 	if (!pend_page)
@@ -3083,6 +3104,9 @@
 
 	gicr_write_propbaser(val, rbase + GICR_PROPBASER);
 	tmp = gicr_read_propbaser(rbase + GICR_PROPBASER);
+
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+		tmp &= ~GICR_PROPBASER_SHAREABILITY_MASK;
 
 	if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) {
 		if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) {
@@ -3108,6 +3132,9 @@
 	gicr_write_pendbaser(val, rbase + GICR_PENDBASER);
 	tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER);
 
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+		tmp &= ~GICR_PENDBASER_SHAREABILITY_MASK;
+
 	if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) {
 		/*
 		 * The HW reports non-shareable, we must remove the
@@ -3271,7 +3298,12 @@
 
 	/* Allocate memory for 2nd level table */
 	if (!table[idx]) {
-		page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO,
+		gfp_t gfp_flags = GFP_KERNEL | __GFP_ZERO;
+		if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE) {
+			gfp_flags |= GFP_DMA;
+		}
+
+		page = alloc_pages_node(its->numa_node, gfp_flags,
 					get_order(baser->psz));
 		if (!page)
 			return false;
@@ -3360,6 +3392,7 @@
 	int nr_lpis;
 	int nr_ites;
 	int sz;
+	gfp_t gfp_flags;
 
 	if (!its_alloc_device_table(its, dev_id))
 		return NULL;
@@ -3367,7 +3400,11 @@
 	if (WARN_ON(!is_power_of_2(nvecs)))
 		nvecs = roundup_pow_of_two(nvecs);
 
-	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	gfp_flags = GFP_KERNEL;
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+		gfp_flags |= GFP_DMA;
+
+	dev = kzalloc(sizeof(*dev), gfp_flags);
 	/*
 	 * Even if the device wants a single LPI, the ITT must be
 	 * sized as a power of two (and you need at least one bit...).
@@ -3375,7 +3412,8 @@
 	nr_ites = max(2, nvecs);
 	sz = nr_ites * (FIELD_GET(GITS_TYPER_ITT_ENTRY_SIZE, its->typer) + 1);
 	sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1;
-	itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node);
+
+	itt = kzalloc_node(sz, gfp_flags, its->numa_node);
 	if (alloc_lpis) {
 		lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis);
 		if (lpi_map)
@@ -4695,6 +4733,13 @@
 	 * page. Trick it into doing the right thing...
 	 */
 	its->vlpi_redist_offset = SZ_128K;
+	return true;
+}
+
+static bool __maybe_unused its_enable_quirk_rk3568(void *data)
+{
+	gic_rdists->flags |= RDIST_FLAGS_FORCE_NO_LOCAL_CACHE;
+
 	return true;
 }
 
@@ -4745,6 +4790,13 @@
 	},
 #endif
 	{
+		.desc	= "ITS: Rockchip RK3568 force no_local_cache",
+		.iidr	= 0x0201743b,
+		.mask	= 0xffffffff,
+		.init	= its_enable_quirk_rk3568,
+	},
+
+	{
 	}
 };
 
@@ -4999,6 +5051,7 @@
 	struct page *page;
 	u32 ctlr;
 	int err;
+	gfp_t gfp_flags;
 
 	its_base = its_map_one(res, &err);
 	if (!its_base)
@@ -5052,7 +5105,11 @@
 
 	its->numa_node = numa_node;
 
-	page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO,
+	gfp_flags = GFP_KERNEL | __GFP_ZERO | GFP_DMA;
+//	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+//		gfp_flags |= GFP_DMA;
+
+	page = alloc_pages_node(its->numa_node, gfp_flags,
 				get_order(ITS_CMD_QUEUE_SZ));
 	if (!page) {
 		err = -ENOMEM;
@@ -5082,6 +5139,9 @@
 
 	gits_write_cbaser(baser, its->base + GITS_CBASER);
 	tmp = gits_read_cbaser(its->base + GITS_CBASER);
+
+	if (gic_rdists->flags & RDIST_FLAGS_FORCE_NO_LOCAL_CACHE)
+		tmp &= ~GITS_CBASER_SHAREABILITY_MASK;
 
 	if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) {
 		if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) {