Commit 4cee0700 authored by Weili Qian's avatar Weili Qian Committed by Herbert Xu
Browse files

crypto: hisilicon/qm - disable qm clock-gating 



For Kunpeng930, if qm clock-gating is enabled, rate limiter
will be inaccurate. Therefore, disable clock-gating before doing task.

Signed-off-by: default avatarWeili Qian <qianweili@huawei.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent c2aec59b

drivers/crypto/hisilicon/qm.c

+17 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ 
#define QM_CQC_VFT			0x1

#define QM_VFT_CFG			0x100060

#define QM_VFT_CFG_OP_ENABLE		0x100054

#define QM_PM_CTRL			0x100148

#define QM_IDLE_DISABLE			BIT(9)



#define QM_VFT_CFG_DATA_L		0x100064

#define QM_VFT_CFG_DATA_H		0x100068
@@ -800,6 +802,19 @@ static void qm_db(struct hisi_qm *qm, u16 qn, u8 cmd, u16 index, u8 priority) 
	qm->ops->qm_db(qm, qn, cmd, index, priority);

}



static void qm_disable_clock_gate(struct hisi_qm *qm)

{

	u32 val;



	/* if qm enables clock gating in Kunpeng930, qos will be inaccurate. */

	if (qm->ver < QM_HW_V3)

		return;



	val = readl(qm->io_base + QM_PM_CTRL);

	val |= QM_IDLE_DISABLE;

	writel(val, qm->io_base +  QM_PM_CTRL);

}



static int qm_dev_mem_reset(struct hisi_qm *qm)

{

	u32 val;
@@ -5935,6 +5950,7 @@ int hisi_qm_init(struct hisi_qm *qm) 
	}



	if (qm->fun_type == QM_HW_PF) {

		qm_disable_clock_gate(qm);

		ret = qm_dev_mem_reset(qm);

		if (ret) {

			dev_err(dev, "failed to reset device memory\n");
@@ -6099,6 +6115,7 @@ static int qm_rebuild_for_resume(struct hisi_qm *qm) 


	qm_cmd_init(qm);

	hisi_qm_dev_err_init(qm);

	qm_disable_clock_gate(qm);

	ret = qm_dev_mem_reset(qm);

	if (ret)

		pci_err(pdev, "failed to reset device memory\n");