Merge "msm: adsprpc: Put upper limit on IOMMU mapping size" (eacbc69c) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/char/adsprpc.c

+22 −1

Original line number	Diff line number	Diff line
		@@ -460,6 +460,7 @@ struct fastrpc_apps {
		struct wakeup_source *wake_source;
		uint32_t duplicate_rsp_err_cnt;
		struct qos_cores silvercores;
		uint32_t max_size_limit;
		};

		struct fastrpc_mmap {
		@@ -1280,8 +1281,12 @@ static int fastrpc_mmap_create(struct fastrpc_file *fl, int fd,
		}
		trace_fastrpc_dma_map(fl->cid, fd, map->phys, map->size,
		len, mflags, map->attach->dma_map_attrs);
		if (map->size < len) {

		VERIFY(err, map->size >= len && map->size < me->max_size_limit);
		if (err) {
		err = -EFAULT;
		pr_err("adsprpc: %s: invalid map size 0x%zx len 0x%zx\n",
		__func__, map->size, len);
		goto bail;
		}

		@@ -1384,8 +1389,17 @@ static int fastrpc_buf_alloc(struct fastrpc_file *fl, size_t size,
		int buf_type, struct fastrpc_buf **obuf)
		{
		int err = 0, vmid;
		struct fastrpc_apps *me = &gfa;
		struct fastrpc_buf *buf = NULL;

		VERIFY(err, size > 0 && size < me->max_size_limit);
		if (err) {
		err = -EFAULT;
		pr_err("adsprpc: %s: invalid allocation size 0x%zx\n",
		__func__, size);
		goto bail;
		}

		VERIFY(err, fl->sctx != NULL);
		if (err) {
		err = -EBADR;
		@@ -5925,9 +5939,11 @@ static int fastrpc_cb_probe(struct device *dev)
		struct fastrpc_channel_ctx *chan;
		struct fastrpc_session_ctx *sess;
		struct of_phandle_args iommuspec;
		struct fastrpc_apps *me = &gfa;
		const char *name;
		int err = 0, cid = -1, i = 0;
		u32 sharedcb_count = 0, j = 0;
		uint32_t dma_addr_pool[2] = {0, 0};

		VERIFY(err, NULL != (name = of_get_property(dev->of_node,
		"label", NULL)));
		@@ -5983,6 +5999,11 @@ static int fastrpc_cb_probe(struct device *dev)
		dma_set_max_seg_size(sess->smmu.dev, DMA_BIT_MASK(32));
		dma_set_seg_boundary(sess->smmu.dev, (unsigned long)DMA_BIT_MASK(64));

		of_property_read_u32_array(dev->of_node, "qcom,iommu-dma-addr-pool",
		dma_addr_pool, 2);
		me->max_size_limit = (dma_addr_pool[1] == 0 ? 0x78000000 :
		dma_addr_pool[1]);

		if (of_get_property(dev->of_node, "shared-cb", NULL) != NULL) {
		err = of_property_read_u32(dev->of_node, "shared-cb",
		&sharedcb_count);