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Commit bdaf8402 authored by Sathish Ambley's avatar Sathish Ambley
Browse files

msm: ADSPRPC: Add FastRPC support for mdsp on 8096 



Allow for RPC communication from Apps to mdsp subsystem by allowing
the carve out range to be accessible from all subsystems.

Change-Id: Ief3208cf7e3a30c1fa35b755cb2a9c19445139ae
Acked-by: default avatarHimateja Reddy <hmreddy@qti.qualcomm.com>
Signed-off-by: default avatarSathish Ambley <sathishambley@codeaurora.org>
parent 6379a990

Documentation/devicetree/bindings/qdsp/msm-mdsprpc-mem.txt

+9 −0
Original line number Diff line number Diff line
@@ -13,3 +13,12 @@ Example: 
		compatible = "qcom,msm-mdsprpc-mem-region";

		memory-region = <&mdsp_mem>;

	};



Ion Heap:



Ion heap allows for sharing of buffers between different processors

and between user space and kernel space.

(see Documentation/devicetree/bindings/arm/msm/msm_ion.txt).



Required properties for Ion heap:

- compatible : "qcom,msm-ion"

drivers/char/adsprpc.c

+39 −1
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ 
#define ADSP_MMAP_HEAP_ADDR 4

#define FASTRPC_ENOSUCH 39

#define VMID_SSC_Q6     5

#define VMID_ADSP_Q6    6



#define RPC_TIMEOUT	(5 * HZ)

#define BALIGN		128
@@ -263,7 +264,6 @@ static struct fastrpc_channel_ctx gcinfo[NUM_CHANNELS] = { 
		.subsys = "dsps",

		.channel = SMD_APPS_DSPS,

		.edge = "dsps",

		.vmid = VMID_SSC_Q6,

	},

	{

		.name = "mdsprpc-smd",
@@ -2333,6 +2333,11 @@ static int fastrpc_probe(struct platform_device *pdev) 
	int err = 0;

	struct fastrpc_apps *me = &gfa;

	struct device *dev = &pdev->dev;

	struct smq_phy_page range;

	struct device_node *ion_node, *node;

	struct platform_device *ion_pdev;

	struct cma *cma;

	uint32_t val;



	if (of_device_is_compatible(dev->of_node,

					"qcom,msm-fastrpc-compute-cb"))
@@ -2357,6 +2362,39 @@ static int fastrpc_probe(struct platform_device *pdev) 
	if (of_device_is_compatible(dev->of_node,

					"qcom,msm-mdsprpc-mem-region")) {

		me->modem_cma_dev = dev;

		range.addr = 0;

		ion_node = of_find_compatible_node(NULL, NULL, "qcom,msm-ion");

		if (ion_node) {

			for_each_available_child_of_node(ion_node, node) {

				if (of_property_read_u32(node, "reg", &val))

					continue;

				if (val != ION_ADSP_HEAP_ID)

					continue;

				ion_pdev = of_find_device_by_node(node);

				if (!ion_pdev)

					break;

				cma = dev_get_cma_area(&ion_pdev->dev);

				if (cma) {

					range.addr = cma_get_base(cma);

					range.size = (size_t)cma_get_size(cma);

				}

				break;

			}

		}

		if (range.addr) {

			int srcVM[1] = {VMID_HLOS};

			int destVM[4] = {VMID_HLOS, VMID_MSS_MSA, VMID_SSC_Q6,

					VMID_ADSP_Q6};

			int destVMperm[4] = {PERM_READ | PERM_WRITE | PERM_EXEC,

					PERM_READ | PERM_WRITE | PERM_EXEC,

					PERM_READ | PERM_WRITE | PERM_EXEC,

					PERM_READ | PERM_WRITE | PERM_EXEC,

					};

			VERIFY(err, !hyp_assign_phys(range.addr, range.size,

					srcVM, 1, destVM, destVMperm, 4));

			if (err)

				goto bail;

		}

		return 0;

	}