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 <[email protected]> --- 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 bcf3c7f8d3e9..2eb8d37cd9b4 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -267,6 +267,8 @@ struct fastrpc_session_ctx { struct fastrpc_soc_data { u32 sid_pos; + u32 cdsp_dma_bits; + u32 dsp_default_dma_bits; }; struct fastrpc_channel_ctx { @@ -2186,6 +2188,7 @@ static int fastrpc_cb_probe(struct platform_device *pdev) int i, sessions = 0; unsigned long flags; int rc; + u32 dma_bits; cctx = dev_get_drvdata(dev->parent); if (!cctx) @@ -2199,12 +2202,16 @@ static int fastrpc_cb_probe(struct platform_device *pdev) spin_unlock_irqrestore(&cctx->lock, flags); return -ENOSPC; } + dma_bits = cctx->soc_data->dsp_default_dma_bits; sess = &cctx->session[cctx->sesscount++]; sess->used = false; sess->valid = true; sess->dev = dev; dev_set_drvdata(dev, sess); + if (cctx->domain_id == CDSP_DOMAIN_ID) + dma_bits = cctx->soc_data->cdsp_dma_bits; + if (of_property_read_u32(dev->of_node, "reg", &sess->sid)) dev_info(dev, "FastRPC Session ID not specified in DT\n"); @@ -2219,9 +2226,9 @@ static int fastrpc_cb_probe(struct platform_device *pdev) } } spin_unlock_irqrestore(&cctx->lock, flags); - rc = dma_set_mask(dev, DMA_BIT_MASK(32)); + rc = 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; } @@ -2308,10 +2315,14 @@ static int fastrpc_get_domain_id(const char *domain) static const struct fastrpc_soc_data kaanapali_soc_data = { .sid_pos = 56, + .cdsp_dma_bits = 34, + .dsp_default_dma_bits = 32, }; static const struct fastrpc_soc_data default_soc_data = { .sid_pos = 32, + .cdsp_dma_bits = 32, + .dsp_default_dma_bits = 32, }; static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) -- 2.34.1
