crypto: qat - add bank save and restore flows

Add logic to save, restore, quiesce and drain a ring bank for QAT GEN4
devices.
This allows to save and restore the state of a Virtual Function (VF) and
will be used to implement VM live migration.

Signed-off-by: Siming Wan <siming.wan@intel.com>
Reviewed-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_accel_devices.h

@@ -140,6 +140,40 @@ struct admin_info {
 	u32 mailbox_offset;
 };
 
+struct ring_config {
+	u64 base;
+	u32 config;
+	u32 head;
+	u32 tail;
+	u32 reserved0;
+};
+
+struct bank_state {
+	u32 ringstat0;
+	u32 ringstat1;
+	u32 ringuostat;
+	u32 ringestat;
+	u32 ringnestat;
+	u32 ringnfstat;
+	u32 ringfstat;
+	u32 ringcstat0;
+	u32 ringcstat1;
+	u32 ringcstat2;
+	u32 ringcstat3;
+	u32 iaintflagen;
+	u32 iaintflagreg;
+	u32 iaintflagsrcsel0;
+	u32 iaintflagsrcsel1;
+	u32 iaintcolen;
+	u32 iaintcolctl;
+	u32 iaintflagandcolen;
+	u32 ringexpstat;
+	u32 ringexpintenable;
+	u32 ringsrvarben;
+	u32 reserved0;
+	struct ring_config rings[ADF_ETR_MAX_RINGS_PER_BANK];
+};
+
 struct adf_hw_csr_ops {
 	u64 (*build_csr_ring_base_addr)(dma_addr_t addr, u32 size);
 	u32 (*read_csr_ring_head)(void __iomem *csr_base_addr, u32 bank,
@@ -271,6 +305,10 @@ struct adf_hw_device_data {
 	void (*enable_ints)(struct adf_accel_dev *accel_dev);
 	void (*set_ssm_wdtimer)(struct adf_accel_dev *accel_dev);
 	int (*ring_pair_reset)(struct adf_accel_dev *accel_dev, u32 bank_nr);
+	int (*bank_state_save)(struct adf_accel_dev *accel_dev, u32 bank_number,
+			       struct bank_state *state);
+	int (*bank_state_restore)(struct adf_accel_dev *accel_dev,
+				  u32 bank_number, struct bank_state *state);
 	void (*reset_device)(struct adf_accel_dev *accel_dev);
 	void (*set_msix_rttable)(struct adf_accel_dev *accel_dev);
 	const char *(*uof_get_name)(struct adf_accel_dev *accel_dev, u32 obj_num);