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charset="utf-8" DSP currently supports 32-bit IOVA (32-bit PA + 4-bit SID) for both Q6 and user DMA (uDMA) access. This is being upgraded to 34-bit PA + 4-bit SID due to a hardware revision in CDSP for Kaanapali SoC, which expands the DMA addressable range. Update DMA bits configuration in the driver to support CDSP on Kaanapali SoC. Set the default `dma_bits` to 32-bit and update it to 34-bit based on CDSP and OF matching on the fastrpc node. Signed-off-by: Kumari Pallavi Reviewed-by: Dmitry Baryshkov --- drivers/misc/fastrpc.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index fcc80206b7c4..4f5a79c50f58 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -259,6 +259,8 @@ struct fastrpc_session_ctx { =20 struct fastrpc_soc_data { u32 sid_pos; + u32 dma_addr_bits_cdsp; + u32 dma_addr_bits_default; }; =20 struct fastrpc_channel_ctx { @@ -2197,6 +2199,7 @@ static int fastrpc_cb_probe(struct platform_device *p= dev) int i, sessions =3D 0; unsigned long flags; int rc; + u32 dma_bits; =20 cctx =3D dev_get_drvdata(dev->parent); if (!cctx) @@ -2210,12 +2213,16 @@ static int fastrpc_cb_probe(struct platform_device = *pdev) spin_unlock_irqrestore(&cctx->lock, flags); return -ENOSPC; } + dma_bits =3D cctx->soc_data->dma_addr_bits_default; sess =3D &cctx->session[cctx->sesscount++]; sess->used =3D false; sess->valid =3D true; sess->dev =3D dev; dev_set_drvdata(dev, sess); =20 + if (cctx->domain_id =3D=3D CDSP_DOMAIN_ID) + dma_bits =3D cctx->soc_data->dma_addr_bits_cdsp; + if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) dev_info(dev, "FastRPC Session ID not specified in DT\n"); =20 @@ -2230,9 +2237,9 @@ static int fastrpc_cb_probe(struct platform_device *p= dev) } } spin_unlock_irqrestore(&cctx->lock, flags); - rc =3D dma_set_mask(dev, DMA_BIT_MASK(32)); + rc =3D dma_set_mask(dev, DMA_BIT_MASK(dma_bits)); if (rc) { - dev_err(dev, "32-bit DMA enable failed\n"); + dev_err(dev, "%u-bit DMA enable failed\n", dma_bits); return rc; } =20 @@ -2319,10 +2326,14 @@ static int fastrpc_get_domain_id(const char *domain) =20 static const struct fastrpc_soc_data kaanapali_soc_data =3D { .sid_pos =3D 56, + .dma_addr_bits_cdsp =3D 34, + .dma_addr_bits_default =3D 32, }; =20 static const struct fastrpc_soc_data default_soc_data =3D { .sid_pos =3D 32, + .dma_addr_bits_cdsp =3D 32, + .dma_addr_bits_default =3D 32, }; =20 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) --=20 2.34.1