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crypto: hisilicon/zip - fix the uncleared debug registers 

ZIP debug registers aren't cleared even if its driver is removed,
so add a clearing operation when remove driver.

Signed-off-by: Hao Fang <fanghao11@huawei.com>
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Hao Fang 2020-09-25 22:06:14 +08:00 committed by Herbert Xu
parent ae6ee6ae2b
commit 698f95235d
1 changed files with 18 additions and 0 deletions
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18
drivers/crypto/hisilicon/zip/zip_main.c
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@ -91,6 +91,11 @@
#define HZIP_SQE_MASK_OFFSET 64
#define HZIP_SQE_MASK_LEN 48
#define HZIP_CNT_CLR_CE_EN BIT(0)
#define HZIP_RO_CNT_CLR_CE_EN BIT(2)
#define HZIP_RD_CNT_CLR_CE_EN (HZIP_CNT_CLR_CE_EN | \
HZIP_RO_CNT_CLR_CE_EN)
static const char hisi_zip_name[] = "hisi_zip";
static struct dentry *hzip_debugfs_root;
@ -604,10 +609,23 @@ failed_to_create:
return ret;
}
/* hisi_zip_debug_regs_clear() - clear the zip debug regs */
static void hisi_zip_debug_regs_clear(struct hisi_qm *qm)
{
int i, j;
/* clear current_qm */
writel(0x0, qm->io_base + QM_DFX_MB_CNT_VF);
writel(0x0, qm->io_base + QM_DFX_DB_CNT_VF);
/* enable register read_clear bit */
writel(HZIP_RD_CNT_CLR_CE_EN, qm->io_base + HZIP_SOFT_CTRL_CNT_CLR_CE);
for (i = 0; i < ARRAY_SIZE(core_offsets); i++)
for (j = 0; j < ARRAY_SIZE(hzip_dfx_regs); j++)
readl(qm->io_base + core_offsets[i] +
hzip_dfx_regs[j].offset);
/* disable register read_clear bit */
writel(0x0, qm->io_base + HZIP_SOFT_CTRL_CNT_CLR_CE);
hisi_qm_debug_regs_clear(qm);