crypto: hisilicon/qm - get hardware features from hardware registers

Before hardware V3, hardwares do not provide the feature registers,
driver resolves hardware differences based on the hardware version.
As a result, the driver does not support the new hardware.

Hardware V3 and later versions support to obtain hardware features,
such as power-gating management and doorbell isolation, through
the hardware registers. To be compatible with later hardware versions,
the features of the current device is obtained by reading the
hardware registers instead of the hardware version.
Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/hpre/hpre_main.c

@@ -457,7 +457,7 @@ static void hpre_open_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	/* Enable prefetch */
@@ -478,7 +478,7 @@ static void hpre_close_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	val = readl_relaxed(qm->io_base + HPRE_PREFETCH_CFG);

drivers/crypto/hisilicon/sec2/sec_main.c

@@ -415,7 +415,7 @@ static void sec_open_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	/* Enable prefetch */
@@ -435,7 +435,7 @@ static void sec_close_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	val = readl_relaxed(qm->io_base + SEC_PREFETCH_CFG);

drivers/crypto/hisilicon/zip/zip_main.c

@@ -348,7 +348,7 @@ static void hisi_zip_open_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	/* Enable prefetch */
@@ -368,7 +368,7 @@ static void hisi_zip_close_sva_prefetch(struct hisi_qm *qm)
 	u32 val;
 	int ret;
 
-	if (qm->ver < QM_HW_V3)
+	if (!test_bit(QM_SUPPORT_SVA_PREFETCH, &qm->caps))
 		return;
 
 	val = readl_relaxed(qm->io_base + HZIP_PREFETCH_CFG);

include/linux/hisi_acc_qm.h

@@ -168,6 +168,15 @@ enum qm_vf_state {
 	QM_NOT_READY,
 };
 
+enum qm_cap_bits {
+	QM_SUPPORT_DB_ISOLATION = 0x0,
+	QM_SUPPORT_FUNC_QOS,
+	QM_SUPPORT_STOP_QP,
+	QM_SUPPORT_MB_COMMAND,
+	QM_SUPPORT_SVA_PREFETCH,
+	QM_SUPPORT_RPM,
+};
+
 struct dfx_diff_registers {
 	u32 *regs;
 	u32 reg_offset;
@@ -258,6 +267,18 @@ struct hisi_qm_err_ini {
 	void (*err_info_init)(struct hisi_qm *qm);
 };
 
+struct hisi_qm_cap_info {
+	u32 type;
+	/* Register offset */
+	u32 offset;
+	/* Bit offset in register */
+	u32 shift;
+	u32 mask;
+	u32 v1_val;
+	u32 v2_val;
+	u32 v3_val;
+};
+
 struct hisi_qm_list {
 	struct mutex lock;
 	struct list_head list;
@@ -278,6 +299,9 @@ struct hisi_qm {
 	struct pci_dev *pdev;
 	void __iomem *io_base;
 	void __iomem *db_io_base;
+
+	/* Capbility version, 0: not supports */
+	u32 cap_ver;
 	u32 sqe_size;
 	u32 qp_base;
 	u32 qp_num;
@@ -304,6 +328,8 @@ struct hisi_qm {
 	struct hisi_qm_err_info err_info;
 	struct hisi_qm_err_status err_status;
 	unsigned long misc_ctl; /* driver removing and reset sched */
+	/* Device capability bit */
+	unsigned long caps;
 
 	struct rw_semaphore qps_lock;
 	struct idr qp_idr;
@@ -326,8 +352,6 @@ struct hisi_qm {
 	bool use_sva;
 	bool is_frozen;
 
-	/* doorbell isolation enable */
-	bool use_db_isolation;
 	resource_size_t phys_base;
 	resource_size_t db_phys_base;
 	struct uacce_device *uacce;
@@ -501,6 +525,9 @@ void hisi_qm_pm_init(struct hisi_qm *qm);
 int hisi_qm_get_dfx_access(struct hisi_qm *qm);
 void hisi_qm_put_dfx_access(struct hisi_qm *qm);
 void hisi_qm_regs_dump(struct seq_file *s, struct debugfs_regset32 *regset);
+u32 hisi_qm_get_hw_info(struct hisi_qm *qm,
+			const struct hisi_qm_cap_info *info_table,
+			u32 index, bool is_read);
 
 /* Used by VFIO ACC live migration driver */
 struct pci_driver *hisi_sec_get_pf_driver(void);