[PATCH 11/14] crypto: inside-secure - reset CDR and RDR rings on module removal
From: Antoine Tenart <hidden>
Date: 2018-06-28 15:21:20
Also in:
lkml
Subsystem:
crypto api, inside secure crypto driver, the rest · Maintainers:
Herbert Xu, "David S. Miller", Antoine Tenart, Linus Torvalds
From: Ofer Heifetz <redacted> 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: Ofer Heifetz <redacted> [Antoine: small reworks, commit message] Signed-off-by: Antoine Tenart <redacted> --- drivers/crypto/inside-secure/safexcel.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index b70694090353..5feb83c6238b 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c@@ -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++)
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2.17.1