crypto: hisilicon - enable zip device clock gating

Kunpeng930 zip device supports dynamic clock gating. When executing tasks,
the algorithm core is opened, and when idle, the algorithm core is closed.
This patch enables zip dynamic clock gating by writing hardware registers.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c
index f8482ceebf2ab70646b1201d398f938877bd3413..d1ca474ea8e30c247e39324ace8d24750b36f0cd 100644 (file)
--- a/drivers/crypto/hisilicon/zip/zip_main.c
+++ b/drivers/crypto/hisilicon/zip/zip_main.c
@@ -107,6 +107,14 @@
 #define HZIP_DELAY_1_US                1
 #define HZIP_POLL_TIMEOUT_US   1000
 
+/* clock gating */
+#define HZIP_PEH_CFG_AUTO_GATE         0x3011A8
+#define HZIP_PEH_CFG_AUTO_GATE_EN      BIT(0)
+#define HZIP_CORE_GATED_EN             GENMASK(15, 8)
+#define HZIP_CORE_GATED_OOO_EN         BIT(29)
+#define HZIP_CLOCK_GATED_EN            (HZIP_CORE_GATED_EN | \
+                                        HZIP_CORE_GATED_OOO_EN)
+
 static const char hisi_zip_name[] = "hisi_zip";
 static struct dentry *hzip_debugfs_root;
 
@@ -312,6 +320,22 @@ static void hisi_zip_close_sva_prefetch(struct hisi_qm *qm)
                pci_err(qm->pdev, "failed to close sva prefetch\n");
 }
 
+static void hisi_zip_enable_clock_gate(struct hisi_qm *qm)
+{
+       u32 val;
+
+       if (qm->ver < QM_HW_V3)
+               return;
+
+       val = readl(qm->io_base + HZIP_CLOCK_GATE_CTRL);
+       val |= HZIP_CLOCK_GATED_EN;
+       writel(val, qm->io_base + HZIP_CLOCK_GATE_CTRL);
+
+       val = readl(qm->io_base + HZIP_PEH_CFG_AUTO_GATE);
+       val |= HZIP_PEH_CFG_AUTO_GATE_EN;
+       writel(val, qm->io_base + HZIP_PEH_CFG_AUTO_GATE);
+}
+
 static int hisi_zip_set_user_domain_and_cache(struct hisi_qm *qm)
 {
        void __iomem *base = qm->io_base;
@@ -359,6 +383,8 @@ static int hisi_zip_set_user_domain_and_cache(struct hisi_qm *qm)
               CQC_CACHE_WB_ENABLE | FIELD_PREP(SQC_CACHE_WB_THRD, 1) |
               FIELD_PREP(CQC_CACHE_WB_THRD, 1), base + QM_CACHE_CTL);
 
+       hisi_zip_enable_clock_gate(qm);
+
        return 0;
 }