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crypto: atmel-tdes - Retire dma_request_slave_channel_compat()

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The driver no longer boots in legacy mode, only via DT. This makes the
dma_request_slave_channel_compat() redundant.
If ever the filter function would be executed it will return false as the
dma_slave is not really initialized.

Switch to use dma_request_chan() which would allow legacy boot if ever
needed again by configuring dma_slave_map for the DMA driver.

At the same time skip allocating memory for dma_slave as it is not used
anymore.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Peter Ujfalusi 2019-11-21 12:16:02 +02:00 committed by Herbert Xu
parent db28512f48
commit 45a536e3a7
1 changed files with 13 additions and 34 deletions
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47
drivers/crypto/atmel-tdes.c
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@ -739,31 +739,17 @@ static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode)
return atmel_tdes_handle_queue(ctx->dd, req);
}
static bool atmel_tdes_filter(struct dma_chan *chan, void *slave)
{
struct at_dma_slave *sl = slave;
if (sl && sl->dma_dev == chan->device->dev) {
chan->private = sl;
return true;
} else {
return false;
}
}
static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
struct crypto_platform_data *pdata)
{
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
int ret;
/* Try to grab 2 DMA channels */
dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask,
atmel_tdes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
if (!dd->dma_lch_in.chan)
dd->dma_lch_in.chan = dma_request_chan(dd->dev, "tx");
if (IS_ERR(dd->dma_lch_in.chan)) {
ret = PTR_ERR(dd->dma_lch_in.chan);
goto err_dma_in;
}
dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
@ -776,10 +762,11 @@ static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_in.dma_conf.device_fc = false;
dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask,
atmel_tdes_filter, &pdata->dma_slave->txdata, dd->dev, "rx");
if (!dd->dma_lch_out.chan)
dd->dma_lch_out.chan = dma_request_chan(dd->dev, "rx");
if (IS_ERR(dd->dma_lch_out.chan)) {
ret = PTR_ERR(dd->dma_lch_out.chan);
goto err_dma_out;
}
dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM;
dd->dma_lch_out.dma_conf.src_addr = dd->phys_base +
@ -797,8 +784,9 @@ static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
err_dma_out:
dma_release_channel(dd->dma_lch_in.chan);
err_dma_in:
dev_warn(dd->dev, "no DMA channel available\n");
return -ENODEV;
if (ret != -EPROBE_DEFER)
dev_warn(dd->dev, "no DMA channel available\n");
return ret;
}
static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd)
@ -1229,12 +1217,6 @@ static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *p
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->dma_slave = devm_kzalloc(&pdev->dev,
sizeof(*(pdata->dma_slave)),
GFP_KERNEL);
if (!pdata->dma_slave)
return ERR_PTR(-ENOMEM);
return pdata;
}
#else /* CONFIG_OF */
@ -1328,10 +1310,7 @@ static int atmel_tdes_probe(struct platform_device *pdev)
goto err_pdata;
}
}
if (!pdata->dma_slave) {
err = -ENXIO;
goto err_pdata;
}
err = atmel_tdes_dma_init(tdes_dd, pdata);
if (err)
goto err_tdes_dma;