crypto: qat - allow detection of dc capabilities for 4xxx

Add logic to allow the detection of data compression capabilities for
4xxx devices.
The capability detection logic has been refactored to separate the
crypto capabilities from the compression ones.

This patch is not updating the returned capability mask as, up to now,
4xxx devices are configured only to handle crypto operations.

Signed-off-by: Giovanni Cabiddu <[e-mail]>
Signed-off-by: Marco Chiappero <[e-mail]>
Reviewed-by: Fiona Trahe <[e-mail]>
Reviewed-by: Marco Chiappero <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c

···
 static u32 get_accel_cap(struct adf_accel_dev *accel_dev)
 {
 	struct pci_dev *pdev = accel_dev->accel_pci_dev.pci_dev;
+	u32 capabilities_cy, capabilities_dc;
 	u32 fusectl1;
-	u32 capabilities = ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC |
-			   ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC |
-			   ICP_ACCEL_CAPABILITIES_CIPHER |
-			   ICP_ACCEL_CAPABILITIES_AUTHENTICATION |
-			   ICP_ACCEL_CAPABILITIES_SHA3 |
-			   ICP_ACCEL_CAPABILITIES_SHA3_EXT |
-			   ICP_ACCEL_CAPABILITIES_HKDF |
-			   ICP_ACCEL_CAPABILITIES_ECEDMONT |
-			   ICP_ACCEL_CAPABILITIES_CHACHA_POLY |
-			   ICP_ACCEL_CAPABILITIES_AESGCM_SPC |
-			   ICP_ACCEL_CAPABILITIES_AES_V2;
 
 	/* Read accelerator capabilities mask */
 	pci_read_config_dword(pdev, ADF_4XXX_FUSECTL1_OFFSET, &fusectl1);
 
+	capabilities_cy = ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC |
+			  ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC |
+			  ICP_ACCEL_CAPABILITIES_CIPHER |
+			  ICP_ACCEL_CAPABILITIES_AUTHENTICATION |
+			  ICP_ACCEL_CAPABILITIES_SHA3 |
+			  ICP_ACCEL_CAPABILITIES_SHA3_EXT |
+			  ICP_ACCEL_CAPABILITIES_HKDF |
+			  ICP_ACCEL_CAPABILITIES_ECEDMONT |
+			  ICP_ACCEL_CAPABILITIES_CHACHA_POLY |
+			  ICP_ACCEL_CAPABILITIES_AESGCM_SPC |
+			  ICP_ACCEL_CAPABILITIES_AES_V2;
+
 	/* A set bit in fusectl1 means the feature is OFF in this SKU */
 	if (fusectl1 & ICP_ACCEL_4XXX_MASK_CIPHER_SLICE) {
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_HKDF;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_HKDF;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
 	}
 	if (fusectl1 & ICP_ACCEL_4XXX_MASK_UCS_SLICE) {
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CHACHA_POLY;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_AESGCM_SPC;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_AES_V2;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CHACHA_POLY;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_AESGCM_SPC;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_AES_V2;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
 	}
 	if (fusectl1 & ICP_ACCEL_4XXX_MASK_AUTH_SLICE) {
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_AUTHENTICATION;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_SHA3;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_SHA3_EXT;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_AUTHENTICATION;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_SHA3;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_SHA3_EXT;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CIPHER;
 	}
 	if (fusectl1 & ICP_ACCEL_4XXX_MASK_PKE_SLICE) {
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC;
-		capabilities &= ~ICP_ACCEL_CAPABILITIES_ECEDMONT;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC;
+		capabilities_cy &= ~ICP_ACCEL_CAPABILITIES_ECEDMONT;
 	}
 
-	return capabilities;
+	capabilities_dc = ICP_ACCEL_CAPABILITIES_COMPRESSION |
+			  ICP_ACCEL_CAPABILITIES_LZ4_COMPRESSION |
+			  ICP_ACCEL_CAPABILITIES_LZ4S_COMPRESSION |
+			  ICP_ACCEL_CAPABILITIES_CNV_INTEGRITY64;
+
+	if (fusectl1 & ICP_ACCEL_4XXX_MASK_COMPRESS_SLICE) {
+		capabilities_dc &= ~ICP_ACCEL_CAPABILITIES_COMPRESSION;
+		capabilities_dc &= ~ICP_ACCEL_CAPABILITIES_LZ4_COMPRESSION;
+		capabilities_dc &= ~ICP_ACCEL_CAPABILITIES_LZ4S_COMPRESSION;
+		capabilities_dc &= ~ICP_ACCEL_CAPABILITIES_CNV_INTEGRITY64;
+	}
+
+	return capabilities_cy;
 }
 
 static enum dev_sku_info get_sku(struct adf_hw_device_data *self)

drivers/crypto/qat/qat_common/icp_qat_hw.h

···
 	ICP_ACCEL_CAPABILITIES_SHA3_EXT = BIT(15),
 	ICP_ACCEL_CAPABILITIES_AESGCM_SPC = BIT(16),
 	ICP_ACCEL_CAPABILITIES_CHACHA_POLY = BIT(17),
-	/* Bits 18-25 are currently reserved */
+	/* Bits 18-21 are currently reserved */
+	ICP_ACCEL_CAPABILITIES_CNV_INTEGRITY = BIT(22),
+	ICP_ACCEL_CAPABILITIES_CNV_INTEGRITY64 = BIT(23),
+	ICP_ACCEL_CAPABILITIES_LZ4_COMPRESSION = BIT(24),
+	ICP_ACCEL_CAPABILITIES_LZ4S_COMPRESSION = BIT(25),
 	ICP_ACCEL_CAPABILITIES_AES_V2 = BIT(26)
 };