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Commit 9bcf9baa authored by Tharun Kumar Merugu's avatar Tharun Kumar Merugu
Browse files

msm: adsprpc: duplicate session info for shared context banks 



Duplicate fastrpc session contexts for shared context banks
depending on the maximum number of sessions allowed.

Change-Id: I7028e70836e3ec32b789aefd0e9ef08dab87d881
Acked-by: default avatarThyagarajan Venkatanarayanan <venkatan@qti.qualcomm.com>
Signed-off-by: default avatarTharun Kumar Merugu <mtharu@codeaurora.org>
parent 3ee4b6f5

Documentation/devicetree/bindings/qdsp/msm-fastrpc.txt

+11 −6
Original line number Diff line number Diff line
@@ -25,6 +25,9 @@ Subnode Required properties: 
- label        :  Label describing the channel this context bank belongs to

- iommus       :  A list of phandle and IOMMU specifier pairs that describe the

			IOMMU master interfaces of the device

- dma-coherent :  A flag marking a context bank as I/O coherent

- shared-cb    :  A value indicating how many fastrpc sessions can share a

			context bank



Example:

	qcom,msm_fastrpc {
@@ -42,12 +45,14 @@ Example: 
		qcom,msm_fastrpc_compute_cb_1 {

			compatible = "qcom,msm-fastrpc-compute-cb";

			label = "adsprpc-smd";

			iommus = <&apps_smmu 0x1401 0x0>,

			iommus = <&apps_smmu 0x1401 0x0>;

			dma-coherent;

		};

		qcom,msm_fastrpc_compute_cb_2 {

			compatible = "qcom,msm-fastrpc-compute-cb";

			label = "adsprpc-smd";

			iommus = <&apps_smmu 0x1402 0x0>,

			label = "sdsprpc-smd";

			iommus = <&apps_smmu 0x1402 0x0>;

			shared-cb = <5>;

		};

	};

drivers/char/adsprpc.c

+20 −1
Original line number Diff line number Diff line
@@ -2960,7 +2960,8 @@ static int fastrpc_cb_probe(struct device *dev) 
	struct of_phandle_args iommuspec;

	const char *name;

	dma_addr_t start = 0x80000000;

	int err = 0, cid, i;

	int err = 0;

	unsigned int sharedcb_count = 0, cid, i, j;

	int secure_vmid = VMID_CP_PIXEL;



	VERIFY(err, NULL != (name = of_get_property(dev->of_node,
@@ -3022,6 +3023,24 @@ 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, DMA_BIT_MASK(64));



	if (of_get_property(dev->of_node, "shared-cb", NULL) != NULL) {

		VERIFY(err, !of_property_read_u32(dev->of_node, "shared-cb",

				&sharedcb_count));

		if (err)

			goto bail;

		if (sharedcb_count > 0) {

			struct fastrpc_session_ctx *dup_sess;



			for (j = 1; j < sharedcb_count &&

					chan->sesscount < NUM_SESSIONS; j++) {

				chan->sesscount++;

				dup_sess = &chan->session[chan->sesscount];

				memcpy(dup_sess, sess,

					sizeof(struct fastrpc_session_ctx));

			}

		}

	}



	chan->sesscount++;

	debugfs_global_file = debugfs_create_file("global", 0644, debugfs_root,

							NULL, &debugfs_fops);