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Commit f1edf29a authored by Ofer Heifetz's avatar Ofer Heifetz Committed by Herbert Xu
Browse files

crypto: inside-secure - reset CDR and RDR rings on module removal 



This patch adds extra steps in the module removal path, to reset the
command and result rings. The corresponding interrupts are cleared, and
the ring address configuration is reset.

Signed-off-by: default avatarOfer Heifetz <oferh@marvell.com>
[Antoine: small reworks, commit message]
Signed-off-by: default avatarAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent fbd0a7c9

drivers/crypto/inside-secure/safexcel.c

+20 −0
Original line number Diff line number Diff line
@@ -1125,6 +1125,24 @@ static int safexcel_probe(struct platform_device *pdev) 
	return ret;

}



static void safexcel_hw_reset_rings(struct safexcel_crypto_priv *priv)

{

	int i;



	for (i = 0; i < priv->config.rings; i++) {

		/* clear any pending interrupt */

		writel(GENMASK(5, 0), EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_STAT);

		writel(GENMASK(7, 0), EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_STAT);



		/* Reset the CDR base address */

		writel(0, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);

		writel(0, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);



		/* Reset the RDR base address */

		writel(0, EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);

		writel(0, EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);

	}

}



static int safexcel_remove(struct platform_device *pdev)

{
@@ -1132,6 +1150,8 @@ static int safexcel_remove(struct platform_device *pdev) 
	int i;



	safexcel_unregister_algorithms(priv);

	safexcel_hw_reset_rings(priv);



	clk_disable_unprepare(priv->clk);



	for (i = 0; i < priv->config.rings; i++)