[PATCH v12 1/2] crypto: hisilicon - qm updates BAR configuration

[Longfang Liu <liulongfang@huawei.com>]

On new platforms greater than QM_HW_V3, the configuration region for the
live migration function of the accelerator device is no longer
placed in the VF, but is instead placed in the PF.

Therefore, the configuration region of the live migration function
needs to be opened when the QM driver is loaded. When the QM driver
is uninstalled, the driver needs to clear this configuration.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerkolothum@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/hisilicon/qm.c | 27 +++++++++++++++++++++++++++
 include/linux/hisi_acc_qm.h   |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index a5b96adf2d1e..e88085c2cbb3 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3019,11 +3019,36 @@ static void qm_put_pci_res(struct hisi_qm *qm)
 	pci_release_mem_regions(pdev);
 }
 
+static void hisi_mig_region_clear(struct hisi_qm *qm)
+{
+	u32 val;
+
+	/* Clear migration region set of PF */
+	if (qm->fun_type == QM_HW_PF && qm->ver > QM_HW_V3) {
+		val = readl(qm->io_base + QM_MIG_REGION_SEL);
+		val &= ~QM_MIG_REGION_EN;
+		writel(val, qm->io_base + QM_MIG_REGION_SEL);
+	}
+}
+
+static void hisi_mig_region_enable(struct hisi_qm *qm)
+{
+	u32 val;
+
+	/* Select migration region of PF */
+	if (qm->fun_type == QM_HW_PF && qm->ver > QM_HW_V3) {
+		val = readl(qm->io_base + QM_MIG_REGION_SEL);
+		val |= QM_MIG_REGION_EN;
+		writel(val, qm->io_base + QM_MIG_REGION_SEL);
+	}
+}
+
 static void hisi_qm_pci_uninit(struct hisi_qm *qm)
 {
 	struct pci_dev *pdev = qm->pdev;
 
 	pci_free_irq_vectors(pdev);
+	hisi_mig_region_clear(qm);
 	qm_put_pci_res(qm);
 	pci_disable_device(pdev);
 }
@@ -5725,6 +5750,7 @@ int hisi_qm_init(struct hisi_qm *qm)
 		goto err_free_qm_memory;
 
 	qm_cmd_init(qm);
+	hisi_mig_region_enable(qm);
 
 	return 0;
 
@@ -5863,6 +5889,7 @@ static int qm_rebuild_for_resume(struct hisi_qm *qm)
 	}
 
 	qm_cmd_init(qm);
+	hisi_mig_region_enable(qm);
 	hisi_qm_dev_err_init(qm);
 	/* Set the doorbell timeout to QM_DB_TIMEOUT_CFG ns. */
 	writel(QM_DB_TIMEOUT_SET, qm->io_base + QM_DB_TIMEOUT_CFG);
diff --git a/include/linux/hisi_acc_qm.h b/include/linux/hisi_acc_qm.h
index c4690e365ade..ca1ec437a3ca 100644
--- a/include/linux/hisi_acc_qm.h
+++ b/include/linux/hisi_acc_qm.h
@@ -99,6 +99,9 @@
 
 #define QM_DEV_ALG_MAX_LEN		256
 
+#define QM_MIG_REGION_SEL		0x100198
+#define QM_MIG_REGION_EN		BIT(0)
+
 /* uacce mode of the driver */
 #define UACCE_MODE_NOUACCE		0 /* don't use uacce */
 #define UACCE_MODE_SVA			1 /* use uacce sva mode */
-- 
2.33.0