[PATCH v2 0/3] crypto: atmel - Retire dma_request_slave_channel_compat()

[PATCH v2 0/3] crypto: atmel - Retire dma_request_slave_channel_compat()

[Peter Ujfalusi]

Hi,

Changes since v1:
- Rebased on next-20191121 to avoid conflict for atmel-aes

I'm going through the kernel to crack down on dma_request_slave_channel_compat()
users.

These drivers no longer needs it as they are only probed via DT and even if they
would probe in legacy mode, the dma_request_chan() + dma_slave_map must be used
for supporting non DT boots.

I have only compile tested the drivers!

Regards,
Peter
---
Peter Ujfalusi (3):
  crypto: atmel-aes - Retire dma_request_slave_channel_compat()
  crypto: atmel-sha - Retire dma_request_slave_channel_compat()
  crypto: atmel-tdes - Retire dma_request_slave_channel_compat()

 drivers/crypto/atmel-aes.c  | 50 ++++++++-----------------------------
 drivers/crypto/atmel-sha.c  | 39 ++++++-----------------------
 drivers/crypto/atmel-tdes.c | 47 ++++++++++------------------------
 3 files changed, 30 insertions(+), 106 deletions(-)

-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v2 1/3] crypto: atmel-aes - Retire dma_request_slave_channel_compat()

[Peter Ujfalusi]

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>
---
 drivers/crypto/atmel-aes.c | 50 ++++++++------------------------------
 1 file changed, 10 insertions(+), 40 deletions(-)

diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c
index 3c88c164c3dc..30c41598fa2a 100644
--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -38,7 +38,6 @@
 #include <crypto/internal/aead.h>
 #include <crypto/internal/skcipher.h>
 #include <linux/platform_data/crypto-atmel.h>
-#include <dt-bindings/dma/at91.h>
 #include "atmel-aes-regs.h"
 #include "atmel-authenc.h"
 
@@ -2364,39 +2363,23 @@ static void atmel_aes_buff_cleanup(struct atmel_aes_dev *dd)
 	free_page((unsigned long)dd->buf);
 }
 
-static bool atmel_aes_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_aes_dma_init(struct atmel_aes_dev *dd,
 			      struct crypto_platform_data *pdata)
 {
-	struct at_dma_slave *slave;
-	dma_cap_mask_t mask;
-
-	dma_cap_zero(mask);
-	dma_cap_set(DMA_SLAVE, mask);
+	int ret;
 
 	/* Try to grab 2 DMA channels */
-	slave = &pdata->dma_slave->rxdata;
-	dd->src.chan = dma_request_slave_channel_compat(mask, atmel_aes_filter,
-							slave, dd->dev, "tx");
-	if (!dd->src.chan)
+	dd->src.chan = dma_request_chan(dd->dev, "tx");
+	if (IS_ERR(dd->src.chan)) {
+		ret = PTR_ERR(dd->src.chan);
 		goto err_dma_in;
+	}
 
-	slave = &pdata->dma_slave->txdata;
-	dd->dst.chan = dma_request_slave_channel_compat(mask, atmel_aes_filter,
-							slave, dd->dev, "rx");
-	if (!dd->dst.chan)
+	dd->dst.chan = dma_request_chan(dd->dev, "rx");
+	if (IS_ERR(dd->dst.chan)) {
+		ret = PTR_ERR(dd->dst.chan);
 		goto err_dma_out;
+	}
 
 	return 0;
 
@@ -2404,7 +2387,7 @@ static int atmel_aes_dma_init(struct atmel_aes_dev *dd,
 	dma_release_channel(dd->src.chan);
 err_dma_in:
 	dev_warn(dd->dev, "no DMA channel available\n");
-	return -ENODEV;
+	return ret;
 }
 
 static void atmel_aes_dma_cleanup(struct atmel_aes_dev *dd)
@@ -2592,14 +2575,6 @@ static struct crypto_platform_data *atmel_aes_of_init(struct platform_device *pd
 	if (!pdata)
 		return ERR_PTR(-ENOMEM);
 
-	pdata->dma_slave = devm_kzalloc(&pdev->dev,
-					sizeof(*(pdata->dma_slave)),
-					GFP_KERNEL);
-	if (!pdata->dma_slave) {
-		devm_kfree(&pdev->dev, pdata);
-		return ERR_PTR(-ENOMEM);
-	}
-
 	return pdata;
 }
 #else
@@ -2626,11 +2601,6 @@ static int atmel_aes_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (!pdata->dma_slave) {
-		err = -ENXIO;
-		goto aes_dd_err;
-	}
-
 	aes_dd = devm_kzalloc(&pdev->dev, sizeof(*aes_dd), GFP_KERNEL);
 	if (aes_dd == NULL) {
 		err = -ENOMEM;
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v2 2/3] crypto: atmel-sha - Retire dma_request_slave_channel_compat()

[Peter Ujfalusi]

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>
---
 drivers/crypto/atmel-sha.c | 39 +++++++-------------------------------
 1 file changed, 7 insertions(+), 32 deletions(-)

diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 8ea0e4bcde0d..9d392c5ff06b 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -2608,32 +2608,16 @@ static int atmel_sha_register_algs(struct atmel_sha_dev *dd)
 	return err;
 }
 
-static bool atmel_sha_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_sha_dma_init(struct atmel_sha_dev *dd,
 				struct crypto_platform_data *pdata)
 {
-	dma_cap_mask_t mask_in;
+	dd->dma_lch_in.chan = dma_request_chan(dd->dev, "tx");
+	if (IS_ERR(dd->dma_lch_in.chan)) {
+		int ret = PTR_ERR(dd->dma_lch_in.chan);
 
-	/* Try to grab DMA channel */
-	dma_cap_zero(mask_in);
-	dma_cap_set(DMA_SLAVE, mask_in);
-
-	dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask_in,
-			atmel_sha_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
-	if (!dd->dma_lch_in.chan) {
-		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;
 	}
 
 	dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
@@ -2724,12 +2708,6 @@ static struct crypto_platform_data *atmel_sha_of_init(struct platform_device *pd
 	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 */
@@ -2823,10 +2801,7 @@ static int atmel_sha_probe(struct platform_device *pdev)
 				goto iclk_unprepare;
 			}
 		}
-		if (!pdata->dma_slave) {
-			err = -ENXIO;
-			goto iclk_unprepare;
-		}
+
 		err = atmel_sha_dma_init(sha_dd, pdata);
 		if (err)
 			goto err_sha_dma;
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v2 3/3] crypto: atmel-tdes - Retire dma_request_slave_channel_compat()

[Peter Ujfalusi]

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>
---
 drivers/crypto/atmel-tdes.c | 47 ++++++++++---------------------------
 1 file changed, 13 insertions(+), 34 deletions(-)

diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c
index bb7c0a387c04..fbc76edaef3e 100644
--- a/drivers/crypto/atmel-tdes.c
+++ b/drivers/crypto/atmel-tdes.c
@@ -703,31 +703,17 @@ 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 +
@@ -740,10 +726,11 @@ 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 +
@@ -761,8 +748,9 @@ 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)
@@ -1193,12 +1181,6 @@ 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 */
@@ -1292,10 +1274,7 @@ 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;
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Re: [PATCH v2 0/3] crypto: atmel - Retire dma_request_slave_channel_compat()

[Vinod Koul]

On 21-11-19, 12:15, Peter Ujfalusi wrote:
> Hi,
> 
> Changes since v1:
> - Rebased on next-20191121 to avoid conflict for atmel-aes
> 
> I'm going through the kernel to crack down on dma_request_slave_channel_compat()
> users.
> 
> These drivers no longer needs it as they are only probed via DT and even if they
> would probe in legacy mode, the dma_request_chan() + dma_slave_map must be used
> for supporting non DT boots.

Reviewed-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod

Re: [PATCH v2 0/3] crypto: atmel - Retire dma_request_slave_channel_compat()

[Herbert Xu]

On Thu, Nov 21, 2019 at 12:15:59PM +0200, Peter Ujfalusi wrote:
> Hi,
> 
> Changes since v1:
> - Rebased on next-20191121 to avoid conflict for atmel-aes
> 
> I'm going through the kernel to crack down on dma_request_slave_channel_compat()
> users.
> 
> These drivers no longer needs it as they are only probed via DT and even if they
> would probe in legacy mode, the dma_request_chan() + dma_slave_map must be used
> for supporting non DT boots.
> 
> I have only compile tested the drivers!
> 
> Regards,
> Peter
> ---
> Peter Ujfalusi (3):
>   crypto: atmel-aes - Retire dma_request_slave_channel_compat()
>   crypto: atmel-sha - Retire dma_request_slave_channel_compat()
>   crypto: atmel-tdes - Retire dma_request_slave_channel_compat()
> 
>  drivers/crypto/atmel-aes.c  | 50 ++++++++-----------------------------
>  drivers/crypto/atmel-sha.c  | 39 ++++++-----------------------
>  drivers/crypto/atmel-tdes.c | 47 ++++++++++------------------------
>  3 files changed, 30 insertions(+), 106 deletions(-)

All applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt