crypto: qat - add support for compression for 4xxx

Add the logic required to enable the compression service for 4xxx devices.
This allows to load the compression firmware image and report
the appropriate compression capabilities.

The firmware image selection for a given device is based on the
'ServicesEnabled' key stored in the internal configuration, which is
added statically at the probe of the device according to the following
rule, by default:
- odd numbered devices assigned to compression services
- even numbered devices assigned to crypto services

In addition, restore the 'ServicesEnabled' key, if present, when SRIOV
is enabled on the device.

Signed-off-by: Tomasz Kowalik <[e-mail]>
Co-developed-by: Mateuszx Potrola <[e-mail]>
Signed-off-by: Mateuszx Potrola <[e-mail]>
Co-developed-by: Giovanni Cabiddu <[e-mail]>
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

···
 /* Copyright(c) 2020 - 2021 Intel Corporation */
 #include <linux/iopoll.h>
 #include <adf_accel_devices.h>
+#include <adf_cfg.h>
 #include <adf_common_drv.h>
 #include <adf_gen4_hw_data.h>
 #include <adf_gen4_pfvf.h>
···
 	char *obj_name;
 };
 
-static struct adf_fw_config adf_4xxx_fw_config[] = {
+static struct adf_fw_config adf_4xxx_fw_cy_config[] = {
 	{0xF0, ADF_4XXX_SYM_OBJ},
 	{0xF, ADF_4XXX_ASYM_OBJ},
+	{0x100, ADF_4XXX_ADMIN_OBJ},
+};
+
+static struct adf_fw_config adf_4xxx_fw_dc_config[] = {
+	{0xF0, ADF_4XXX_DC_OBJ},
+	{0xF, ADF_4XXX_DC_OBJ},
 	{0x100, ADF_4XXX_ADMIN_OBJ},
 };
 
···
 	.type = DEV_4XXX,
 	.instances = 0,
 };
+
+enum dev_services {
+	SVC_CY = 0,
+	SVC_DC,
+};
+
+static const char *const dev_cfg_services[] = {
+	[SVC_CY] = ADF_CFG_CY,
+	[SVC_DC] = ADF_CFG_DC,
+};
+
+static int get_service_enabled(struct adf_accel_dev *accel_dev)
+{
+	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
+	u32 ret;
+
+	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				      ADF_SERVICES_ENABLED, services);
+	if (ret) {
+		dev_err(&GET_DEV(accel_dev),
+			ADF_SERVICES_ENABLED " param not found\n");
+		return ret;
+	}
+
+	ret = match_string(dev_cfg_services, ARRAY_SIZE(dev_cfg_services),
+			   services);
+	if (ret < 0)
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid value of " ADF_SERVICES_ENABLED " param: %s\n",
+			services);
+
+	return ret;
+}
 
 static u32 get_accel_mask(struct adf_hw_device_data *self)
 {
···
 		capabilities_dc &= ~ICP_ACCEL_CAPABILITIES_CNV_INTEGRITY64;
 	}
 
-	return capabilities_cy;
+	switch (get_service_enabled(accel_dev)) {
+	case SVC_CY:
+		return capabilities_cy;
+	case SVC_DC:
+		return capabilities_dc;
+	}
+
+	return 0;
 }
 
 static enum dev_sku_info get_sku(struct adf_hw_device_data *self)
···
 
 static u32 uof_get_num_objs(void)
 {
-	return ARRAY_SIZE(adf_4xxx_fw_config);
+	BUILD_BUG_ON_MSG(ARRAY_SIZE(adf_4xxx_fw_cy_config) !=
+			 ARRAY_SIZE(adf_4xxx_fw_dc_config),
+			 "Size mismatch between adf_4xxx_fw_*_config arrays");
+
+	return ARRAY_SIZE(adf_4xxx_fw_cy_config);
 }
 
-static char *uof_get_name(u32 obj_num)
+static char *uof_get_name(struct adf_accel_dev *accel_dev, u32 obj_num)
 {
-	return adf_4xxx_fw_config[obj_num].obj_name;
+	switch (get_service_enabled(accel_dev)) {
+	case SVC_CY:
+		return adf_4xxx_fw_cy_config[obj_num].obj_name;
+	case SVC_DC:
+		return adf_4xxx_fw_dc_config[obj_num].obj_name;
+	}
+
+	return NULL;
 }
 
-static u32 uof_get_ae_mask(u32 obj_num)
+static u32 uof_get_ae_mask(struct adf_accel_dev *accel_dev, u32 obj_num)
 {
-	return adf_4xxx_fw_config[obj_num].ae_mask;
+	switch (get_service_enabled(accel_dev)) {
+	case SVC_CY:
+		return adf_4xxx_fw_cy_config[obj_num].ae_mask;
+	case SVC_DC:
+		return adf_4xxx_fw_dc_config[obj_num].ae_mask;
+	}
+
+	return 0;
 }
 
 void adf_init_hw_data_4xxx(struct adf_hw_device_data *hw_data)

drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.h

···
 #define ADF_4XXX_FW		"qat_4xxx.bin"
 #define ADF_4XXX_MMP		"qat_4xxx_mmp.bin"
 #define ADF_4XXX_SYM_OBJ	"qat_4xxx_sym.bin"
+#define ADF_4XXX_DC_OBJ		"qat_4xxx_dc.bin"
 #define ADF_4XXX_ASYM_OBJ	"qat_4xxx_asym.bin"
 #define ADF_4XXX_ADMIN_OBJ	"qat_4xxx_admin.bin"
 

drivers/crypto/qat/qat_4xxx/adf_drv.c

···
 	adf_devmgr_rm_dev(accel_dev, NULL);
 }
 
+static int adf_cfg_dev_init(struct adf_accel_dev *accel_dev)
+{
+	const char *config;
+	int ret;
+
+	config = accel_dev->accel_id % 2 ? ADF_CFG_DC : ADF_CFG_CY;
+
+	ret = adf_cfg_section_add(accel_dev, ADF_GENERAL_SEC);
+	if (ret)
+		return ret;
+
+	/* Default configuration is crypto only for even devices
+	 * and compression for odd devices
+	 */
+	ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
+					  ADF_SERVICES_ENABLED, config,
+					  ADF_STR);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int adf_crypto_dev_config(struct adf_accel_dev *accel_dev)
 {
 	char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
···
 		goto out_err;
 	}
 
+	ret = adf_cfg_dev_init(accel_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize configuration.\n");
+		goto out_err;
+	}
+
 	/* Get accelerator capabilities mask */
 	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
+	if (!hw_data->accel_capabilities_mask) {
+		dev_err(&pdev->dev, "Failed to get capabilities mask.\n");
+		goto out_err;
+	}
 
 	/* Find and map all the device's BARS */
 	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM) & ADF_4XXX_BAR_MASK;

drivers/crypto/qat/qat_common/adf_accel_devices.h

···
 	int (*ring_pair_reset)(struct adf_accel_dev *accel_dev, u32 bank_nr);
 	void (*reset_device)(struct adf_accel_dev *accel_dev);
 	void (*set_msix_rttable)(struct adf_accel_dev *accel_dev);
-	char *(*uof_get_name)(u32 obj_num);
+	char *(*uof_get_name)(struct adf_accel_dev *accel_dev, u32 obj_num);
 	u32 (*uof_get_num_objs)(void);
-	u32 (*uof_get_ae_mask)(u32 obj_num);
+	u32 (*uof_get_ae_mask)(struct adf_accel_dev *accel_dev, u32 obj_num);
 	struct adf_pfvf_ops pfvf_ops;
 	struct adf_hw_csr_ops csr_ops;
 	const char *fw_name;

drivers/crypto/qat/qat_common/adf_accel_engine.c

···
 	num_objs = hw_device->uof_get_num_objs();
 
 	for (i = 0; i < num_objs; i++) {
-		obj_name = hw_device->uof_get_name(i);
-		ae_mask = hw_device->uof_get_ae_mask(i);
+		obj_name = hw_device->uof_get_name(accel_dev, i);
+		ae_mask = hw_device->uof_get_ae_mask(accel_dev, i);
+		if (!obj_name || !ae_mask) {
+			dev_err(&GET_DEV(accel_dev), "Invalid UOF image\n");
+			goto out_err;
+		}
 
 		if (qat_uclo_set_cfg_ae_mask(loader, ae_mask)) {
 			dev_err(&GET_DEV(accel_dev),

drivers/crypto/qat/qat_common/adf_cfg.c

···
 	up_read(&cfg->lock);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(adf_cfg_get_param_value);

drivers/crypto/qat/qat_common/adf_cfg_strings.h

···
 #define ADF_RING_ASYM_BANK_NUM "BankAsymNumber"
 #define ADF_CY "Cy"
 #define ADF_DC "Dc"
+#define ADF_CFG_DC "dc"
+#define ADF_CFG_CY "sym;asym"
+#define ADF_SERVICES_ENABLED "ServicesEnabled"
 #define ADF_ETRMGR_COALESCING_ENABLED "InterruptCoalescingEnabled"
 #define ADF_ETRMGR_COALESCING_ENABLED_FORMAT \
 	ADF_ETRMGR_BANK "%d" ADF_ETRMGR_COALESCING_ENABLED

drivers/crypto/qat/qat_common/adf_sriov.c

···
 }
 EXPORT_SYMBOL_GPL(adf_disable_sriov);
 
+static int adf_sriov_prepare_restart(struct adf_accel_dev *accel_dev)
+{
+	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
+	int ret;
+
+	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				      ADF_SERVICES_ENABLED, services);
+
+	adf_dev_stop(accel_dev);
+	adf_dev_shutdown(accel_dev);
+
+	if (!ret) {
+		ret = adf_cfg_section_add(accel_dev, ADF_GENERAL_SEC);
+		if (ret)
+			return ret;
+
+		ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
+						  ADF_SERVICES_ENABLED,
+						  services, ADF_STR);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 /**
  * adf_sriov_configure() - Enable SRIOV for the device
  * @pdev:  Pointer to PCI device.
···
 			return -EBUSY;
 		}
 
-		adf_dev_stop(accel_dev);
-		adf_dev_shutdown(accel_dev);
+		ret = adf_sriov_prepare_restart(accel_dev);
+		if (ret)
+			return ret;
 	}
 
 	if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))