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Commit 7752d708 authored by Tharun Kumar Merugu's avatar Tharun Kumar Merugu
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msm: adsprpc: decrease length of IOVA mask for SDSP devices 



Two bits are sufficient to append all valid stream IDs for SDSP
fastrpc context banks for sm8150 as a software workaround. This
will eliminate the possibility of invalid IOVA generation.

Change-Id: I66a23d291a40331c0693a8dd31013b8a1ea545c7
Acked-by: default avatarThyagarajan Venkatanarayanan <venkatan@qti.qualcomm.com>
Signed-off-by: default avatarTharun Kumar Merugu <mtharu@codeaurora.org>
parent 4b243459

drivers/char/adsprpc.c

+10 −2
Original line number Diff line number Diff line
@@ -2990,16 +2990,24 @@ static int fastrpc_cb_probe(struct device *dev) 
	if (err)

		goto bail;

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

	sess->smmu.cb = iommuspec.args[0] & 0xf;

	sess->used = 0;

	sess->smmu.coherent = of_property_read_bool(dev->of_node,

						"dma-coherent");

	sess->smmu.secure = of_property_read_bool(dev->of_node,

						"qcom,secure-context-bank");



	/* Software workaround for SMMU interconnect HW bug */

	if (cid == SDSP_DOMAIN_ID) {

		sess->smmu.cb = iommuspec.args[0] & 0x3;

		VERIFY(err, sess->smmu.cb);

		if (err)

			goto bail;

		start += ((uint64_t)sess->smmu.cb << 32);

		dma_set_mask(dev, DMA_BIT_MASK(36));

		dma_set_mask(dev, DMA_BIT_MASK(34));

	} else {

		sess->smmu.cb = iommuspec.args[0] & 0xf;

	}



	if (sess->smmu.secure)

		start = 0x60000000;

	VERIFY(err, !IS_ERR_OR_NULL(sess->smmu.mapping =