crypto: qat - add capability detection logic in qat_4xxx

Add logic to detect device capabilities in qat_4xxx driver.

Read fuses and build the device capabilities mask. This will enable
services and handling specific to QAT 4xxx devices.
Co-developed-by: Tomaszx Kowalik <tomaszx.kowalik@intel.com>
Signed-off-by: Tomaszx Kowalik <tomaszx.kowalik@intel.com>
Signed-off-by: Marco Chiappero <marco.chiappero@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c

@@ -5,6 +5,7 @@
 #include <adf_pf2vf_msg.h>
 #include <adf_gen4_hw_data.h>
 #include "adf_4xxx_hw_data.h"
+#include "icp_qat_hw.h"
 
 struct adf_fw_config {
 	u32 ae_mask;
@@ -91,6 +92,28 @@ static void set_msix_default_rttable(struct adf_accel_dev *accel_dev)
 		ADF_CSR_WR(csr, ADF_4XXX_MSIX_RTTABLE_OFFSET(i), i);
 }
 
+static u32 get_accel_cap(struct adf_accel_dev *accel_dev)
+{
+	struct pci_dev *pdev = accel_dev->accel_pci_dev.pci_dev;
+	u32 fusectl1;
+	u32 capabilities = ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC |
+			   ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC |
+			   ICP_ACCEL_CAPABILITIES_AUTHENTICATION |
+			   ICP_ACCEL_CAPABILITIES_AES_V2;
+
+	/* Read accelerator capabilities mask */
+	pci_read_config_dword(pdev, ADF_4XXX_FUSECTL1_OFFSET, &fusectl1);
+
+	if (fusectl1 & ICP_ACCEL_4XXX_MASK_CIPHER_SLICE)
+		capabilities &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_SYMMETRIC;
+	if (fusectl1 & ICP_ACCEL_4XXX_MASK_AUTH_SLICE)
+		capabilities &= ~ICP_ACCEL_CAPABILITIES_AUTHENTICATION;
+	if (fusectl1 & ICP_ACCEL_4XXX_MASK_PKE_SLICE)
+		capabilities &= ~ICP_ACCEL_CAPABILITIES_CRYPTO_ASYMMETRIC;
+
+	return capabilities;
+}
+
 static enum dev_sku_info get_sku(struct adf_hw_device_data *self)
 {
 	return DEV_SKU_1;
@@ -189,6 +212,7 @@ void adf_init_hw_data_4xxx(struct adf_hw_device_data *hw_data)
 	hw_data->get_misc_bar_id = get_misc_bar_id;
 	hw_data->get_arb_info = get_arb_info;
 	hw_data->get_admin_info = get_admin_info;
+	hw_data->get_accel_cap = get_accel_cap;
 	hw_data->get_sku = get_sku;
 	hw_data->fw_name = ADF_4XXX_FW;
 	hw_data->fw_mmp_name = ADF_4XXX_MMP;

drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h

@@ -69,6 +69,17 @@
 #define ADF_4XXX_ASYM_OBJ	"qat_4xxx_asym.bin"
 #define ADF_4XXX_ADMIN_OBJ	"qat_4xxx_admin.bin"
 
+/* qat_4xxx fuse bits are different from old GENs, redefine them */
+enum icp_qat_4xxx_slice_mask {
+	ICP_ACCEL_4XXX_MASK_CIPHER_SLICE = BIT(0),
+	ICP_ACCEL_4XXX_MASK_AUTH_SLICE = BIT(1),
+	ICP_ACCEL_4XXX_MASK_PKE_SLICE = BIT(2),
+	ICP_ACCEL_4XXX_MASK_COMPRESS_SLICE = BIT(3),
+	ICP_ACCEL_4XXX_MASK_UCS_SLICE = BIT(4),
+	ICP_ACCEL_4XXX_MASK_EIA3_SLICE = BIT(5),
+	ICP_ACCEL_4XXX_MASK_SMX_SLICE = BIT(6),
+};
+
 void adf_init_hw_data_4xxx(struct adf_hw_device_data *hw_data);
 void adf_clean_hw_data_4xxx(struct adf_hw_device_data *hw_data);
 

drivers/crypto/qat/qat_4xxx/adf_drv.c

@@ -233,6 +233,9 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 	}
 
+	/* Get accelerator capabilities mask */
+	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
+
 	/* Find and map all the device's BARS */
 	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM) & ADF_4XXX_BAR_MASK;