crypto: inside-secure - Add support for EIP197 with output classifier

This patch adds support for EIP197 instances that include the output
classifier (OCE) option, as used by one of our biggest customers.
The OCE normally requires initialization and dedicated firmware, but
for the simple operations supported by this driver, we just bypass it
completely for now (using what is formally a debug feature).

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@rambus.com>
Acked-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 41 insertions, 3 deletions

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index fa7398e68858..eb2418450f12 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -304,6 +304,11 @@ static void eip197_init_firmware(struct safexcel_crypto_priv *priv)
 		/* Enable access to all IFPP program memories */
 		writel(EIP197_PE_ICE_RAM_CTRL_FPP_PROG_EN,
 		       EIP197_PE(priv) + EIP197_PE_ICE_RAM_CTRL(pe));
+
+		/* bypass the OCE, if present */
+		if (priv->flags & EIP197_OCE)
+			writel(EIP197_DEBUG_OCE_BYPASS, EIP197_PE(priv) +
+							EIP197_PE_DEBUG(pe));
 	}
 
 }
@@ -1495,6 +1500,9 @@ static int safexcel_probe_generic(void *pdev,
 	hwopt = readl(EIP197_GLOBAL(priv) + EIP197_OPTIONS);
 	hiaopt = readl(EIP197_HIA_AIC(priv) + EIP197_HIA_OPTIONS);
 
+	priv->hwconfig.icever = 0;
+	priv->hwconfig.ocever = 0;
+	priv->hwconfig.psever = 0;
 	if (priv->flags & SAFEXCEL_HW_EIP197) {
 		/* EIP197 */
 		peopt = readl(EIP197_PE(priv) + EIP197_PE_OPTIONS(0));
@@ -1513,8 +1521,37 @@ static int safexcel_probe_generic(void *pdev,
 					    EIP197_N_RINGS_MASK;
 		if (hiaopt & EIP197_HIA_OPT_HAS_PE_ARB)
 			priv->flags |= EIP197_PE_ARB;
-		if (EIP206_OPT_ICE_TYPE(peopt) == 1)
+		if (EIP206_OPT_ICE_TYPE(peopt) == 1) {
 			priv->flags |= EIP197_ICE;
+			/* Detect ICE EIP207 class. engine and version */
+			version = readl(EIP197_PE(priv) +
+				  EIP197_PE_ICE_VERSION(0));
+			if (EIP197_REG_LO16(version) != EIP207_VERSION_LE) {
+				dev_err(dev, "EIP%d: ICE EIP207 not detected.\n",
+					peid);
+				return -ENODEV;
+			}
+			priv->hwconfig.icever = EIP197_VERSION_MASK(version);
+		}
+		if (EIP206_OPT_OCE_TYPE(peopt) == 1) {
+			priv->flags |= EIP197_OCE;
+			/* Detect EIP96PP packet stream editor and version */
+			version = readl(EIP197_PE(priv) + EIP197_PE_PSE_VERSION(0));
+			if (EIP197_REG_LO16(version) != EIP96_VERSION_LE) {
+				dev_err(dev, "EIP%d: EIP96PP not detected.\n", peid);
+				return -ENODEV;
+			}
+			priv->hwconfig.psever = EIP197_VERSION_MASK(version);
+			/* Detect OCE EIP207 class. engine and version */
+			version = readl(EIP197_PE(priv) +
+				  EIP197_PE_ICE_VERSION(0));
+			if (EIP197_REG_LO16(version) != EIP207_VERSION_LE) {
+				dev_err(dev, "EIP%d: OCE EIP207 not detected.\n",
+					peid);
+				return -ENODEV;
+			}
+			priv->hwconfig.ocever = EIP197_VERSION_MASK(version);
+		}
 		/* If not a full TRC, then assume simple TRC */
 		if (!(hwopt & EIP197_OPT_HAS_TRC))
 			priv->flags |= EIP197_SIMPLE_TRC;
@@ -1552,13 +1589,14 @@ static int safexcel_probe_generic(void *pdev,
 				    EIP197_PE_EIP96_OPTIONS(0));
 
 	/* Print single info line describing what we just detected */
-	dev_info(priv->dev, "EIP%d:%x(%d,%d,%d,%d)-HIA:%x(%d,%d,%d),PE:%x/%x,alg:%08x\n",
+	dev_info(priv->dev, "EIP%d:%x(%d,%d,%d,%d)-HIA:%x(%d,%d,%d),PE:%x/%x(alg:%08x)/%x/%x/%x\n",
 		 peid, priv->hwconfig.hwver, hwctg, priv->hwconfig.hwnumpes,
 		 priv->hwconfig.hwnumrings, priv->hwconfig.hwnumraic,
 		 priv->hwconfig.hiaver, priv->hwconfig.hwdataw,
 		 priv->hwconfig.hwcfsize, priv->hwconfig.hwrfsize,
 		 priv->hwconfig.ppver, priv->hwconfig.pever,
-		 priv->hwconfig.algo_flags);
+		 priv->hwconfig.algo_flags, priv->hwconfig.icever,
+		 priv->hwconfig.ocever, priv->hwconfig.psever);
 
 	safexcel_configure(priv);