crypto: qat - adf_get_etr_base() helper

Add and use the new helper function adf_get_etr_base() which retrieves
the virtual address of the ring bar.

This will be used extensively when adding support for Live Migration.
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Xin Zeng <xin.zeng@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_common_drv.h

@@ -248,6 +248,16 @@ static inline void __iomem *adf_get_pmisc_base(struct adf_accel_dev *accel_dev)
 	return pmisc->virt_addr;
 }
 
+static inline void __iomem *adf_get_etr_base(struct adf_accel_dev *accel_dev)
+{
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	struct adf_bar *etr;
+
+	etr = &GET_BARS(accel_dev)[hw_data->get_etr_bar_id(hw_data)];
+
+	return etr->virt_addr;
+}
+
 static inline void __iomem *adf_get_aram_base(struct adf_accel_dev *accel_dev)
 {
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;

drivers/crypto/intel/qat/qat_common/adf_gen4_hw_data.c

@@ -321,8 +321,7 @@ static int reset_ring_pair(void __iomem *csr, u32 bank_number)
 int adf_gen4_ring_pair_reset(struct adf_accel_dev *accel_dev, u32 bank_number)
 {
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
-	u32 etr_bar_id = hw_data->get_etr_bar_id(hw_data);
-	void __iomem *csr;
+	void __iomem *csr = adf_get_etr_base(accel_dev);
 	int ret;
 
 	if (bank_number >= hw_data->num_banks)
@@ -331,7 +330,6 @@ int adf_gen4_ring_pair_reset(struct adf_accel_dev *accel_dev, u32 bank_number)
 	dev_dbg(&GET_DEV(accel_dev),
 		"ring pair reset for bank:%d\n", bank_number);
 
-	csr = (&GET_BARS(accel_dev)[etr_bar_id])->virt_addr;
 	ret = reset_ring_pair(csr, bank_number);
 	if (ret)
 		dev_err(&GET_DEV(accel_dev),

drivers/crypto/intel/qat/qat_common/adf_transport.c

@@ -474,7 +474,6 @@ static int adf_init_bank(struct adf_accel_dev *accel_dev,
 int adf_init_etr_data(struct adf_accel_dev *accel_dev)
 {
 	struct adf_etr_data *etr_data;
-	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 	void __iomem *csr_addr;
 	u32 size;
 	u32 num_banks = 0;
@@ -495,8 +494,7 @@ int adf_init_etr_data(struct adf_accel_dev *accel_dev)
 	}
 
 	accel_dev->transport = etr_data;
-	i = hw_data->get_etr_bar_id(hw_data);
-	csr_addr = accel_dev->accel_pci_dev.pci_bars[i].virt_addr;
+	csr_addr = adf_get_etr_base(accel_dev);
 
 	/* accel_dev->debugfs_dir should always be non-NULL here */
 	etr_data->debug = debugfs_create_dir("transport",