The HiSilicon SEC engine driver uses DebugFS
to provide main debug information for user space.
Signed-off-by: Zaibo Xu <xuzaibo@xxxxxxxxxx>
Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
---
drivers/crypto/hisilicon/sec2/sec.h | 23 ++
drivers/crypto/hisilicon/sec2/sec_crypto.c | 3 +
drivers/crypto/hisilicon/sec2/sec_main.c | 323 +++++++++++++++++++++++++++++
3 files changed, 349 insertions(+)
diff --git a/drivers/crypto/hisilicon/sec2/sec.h b/drivers/crypto/hisilicon/sec2/sec.h
index 69b37f2..26754d0 100644
--- a/drivers/crypto/hisilicon/sec2/sec.h
+++ b/drivers/crypto/hisilicon/sec2/sec.h
@@ -119,9 +119,32 @@ enum sec_endian {
SEC_64BE
};
+enum sec_debug_file_index {
+ SEC_CURRENT_QM,
+ SEC_CLEAR_ENABLE,
+ SEC_DEBUG_FILE_NUM,
+};
+
+struct sec_debug_file {
+ enum sec_debug_file_index index;
+ spinlock_t lock;
+ struct hisi_qm *qm;
+};
+
+struct sec_dfx {
+ u64 send_cnt;
+ u64 recv_cnt;
+};
+
+struct sec_debug {
+ struct sec_dfx dfx;
+ struct sec_debug_file files[SEC_DEBUG_FILE_NUM];
+};
+
struct sec_dev {
struct hisi_qm qm;
struct list_head list;
+ struct sec_debug debug;
u32 ctx_q_num;
u32 num_vfs;
unsigned long status;
diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.c b/drivers/crypto/hisilicon/sec2/sec_crypto.c
index b22dac7..98360f6 100644
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
@@ -120,6 +120,8 @@ static void sec_req_cb(struct hisi_qp *qp, void *resp)
return;
}
+ __sync_add_and_fetch(&req->ctx->sec->debug.dfx.recv_cnt, 1);
+
req->ctx->req_op->buf_unmap(req->ctx, req);
req->ctx->req_op->callback(req->ctx, req);
@@ -133,6 +135,7 @@ static int sec_bd_send(struct sec_ctx *ctx, struct sec_req *req)
mutex_lock(&qp_ctx->req_lock);
ret = hisi_qp_send(qp_ctx->qp, &req->sec_sqe);
mutex_unlock(&qp_ctx->req_lock);
+ __sync_add_and_fetch(&ctx->sec->debug.dfx.send_cnt, 1);
if (ret == -EBUSY)
return -ENOBUFS;
diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index 00dd4c3..a001797 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -4,6 +4,7 @@
#include <linux/acpi.h>
#include <linux/aer.h>
#include <linux/bitops.h>
+#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -32,6 +33,8 @@
#define SEC_PF_DEF_Q_BASE 0
#define SEC_CTX_Q_NUM_DEF 24
+#define SEC_CTRL_CNT_CLR_CE 0x301120
+#define SEC_CTRL_CNT_CLR_CE_BIT BIT(0)
#define SEC_ENGINE_PF_CFG_OFF 0x300000
#define SEC_ACC_COMMON_REG_OFF 0x1000
#define SEC_CORE_INT_SOURCE 0x301010
@@ -72,6 +75,8 @@
#define SEC_DELAY_10_US 10
#define SEC_POLL_TIMEOUT_US 1000
+#define SEC_VF_CNT_MASK 0xffffffc0
+#define SEC_DBGFS_VAL_MAX_LEN 20
#define SEC_ADDR(qm, offset) ((qm)->io_base + (offset) + \
SEC_ENGINE_PF_CFG_OFF + SEC_ACC_COMMON_REG_OFF)
@@ -82,6 +87,7 @@ struct sec_hw_error {
};
static const char sec_name[] = "hisi_sec2";
+static struct dentry *sec_debugfs_root;
static LIST_HEAD(sec_list);
static DEFINE_MUTEX(sec_list_lock);
@@ -129,6 +135,35 @@ struct sec_dev *sec_find_device(int node)
return ret;
}
+static const char * const sec_dbg_file_name[] = {
+ [SEC_CURRENT_QM] = "current_qm",
+ [SEC_CLEAR_ENABLE] = "clear_enable",
+};
+
+static struct debugfs_reg32 sec_dfx_regs[] = {
+ {"SEC_PF_ABNORMAL_INT_SOURCE ", 0x301010},
+ {"SEC_SAA_EN ", 0x301270},
+ {"SEC_BD_LATENCY_MIN ", 0x301600},
+ {"SEC_BD_LATENCY_MAX ", 0x301608},
+ {"SEC_BD_LATENCY_AVG ", 0x30160C},
+ {"SEC_BD_NUM_IN_SAA0 ", 0x301670},
+ {"SEC_BD_NUM_IN_SAA1 ", 0x301674},
+ {"SEC_BD_NUM_IN_SEC ", 0x301680},
+ {"SEC_ECC_1BIT_CNT ", 0x301C00},
+ {"SEC_ECC_1BIT_INFO ", 0x301C04},
+ {"SEC_ECC_2BIT_CNT ", 0x301C10},
+ {"SEC_ECC_2BIT_INFO ", 0x301C14},
+ {"SEC_BD_SAA0 ", 0x301C20},
+ {"SEC_BD_SAA1 ", 0x301C24},
+ {"SEC_BD_SAA2 ", 0x301C28},
+ {"SEC_BD_SAA3 ", 0x301C2C},
+ {"SEC_BD_SAA4 ", 0x301C30},
+ {"SEC_BD_SAA5 ", 0x301C34},
+ {"SEC_BD_SAA6 ", 0x301C38},
+ {"SEC_BD_SAA7 ", 0x301C3C},
+ {"SEC_BD_SAA8 ", 0x301C40},
+};
+
static int sec_pf_q_num_set(const char *val, const struct kernel_param *kp)
{
struct pci_dev *pdev;
@@ -335,6 +370,19 @@ static int sec_set_user_domain_and_cache(struct sec_dev *sec)
return sec_engine_init(sec);
}
+/* sec_debug_regs_clear() - clear the sec debug regs */
+static void sec_debug_regs_clear(struct hisi_qm *qm)
+{
+ /* clear current_qm */
+ writel(0x0, qm->io_base + QM_DFX_MB_CNT_VF);
+ writel(0x0, qm->io_base + QM_DFX_DB_CNT_VF);
+
+ /* clear rdclr_en */
+ writel(0x0, qm->io_base + SEC_CTRL_CNT_CLR_CE);
+
+ hisi_qm_debug_regs_clear(qm);
+}
+
static void sec_hw_error_enable(struct sec_dev *sec)
{
struct hisi_qm *qm = &sec->qm;
@@ -407,6 +455,250 @@ static void sec_hw_error_uninit(struct sec_dev *sec)
writel(GENMASK(12, 0), sec->qm.io_base + SEC_QM_ABNORMAL_INT_MASK);
}
+static u32 sec_current_qm_read(struct sec_debug_file *file)
+{
+ struct hisi_qm *qm = file->qm;
+
+ return readl(qm->io_base + QM_DFX_MB_CNT_VF);
+}
+
+static int sec_current_qm_write(struct sec_debug_file *file, u32 val)
+{
+ struct hisi_qm *qm = file->qm;
+ struct sec_dev *sec = container_of(qm, struct sec_dev, qm);
+ u32 vfq_num;
+ u32 tmp;
+
+ if (val > sec->num_vfs)
+ return -EINVAL;
+
+ /* According PF or VF Dev ID to calculation curr_qm_qp_num and store */
+ if (!val) {
+ qm->debug.curr_qm_qp_num = qm->qp_num;
+ } else {
+ vfq_num = (qm->ctrl_qp_num - qm->qp_num) / sec->num_vfs;
+
+ if (val == sec->num_vfs)
+ qm->debug.curr_qm_qp_num =
+ qm->ctrl_qp_num - qm->qp_num -
+ (sec->num_vfs - 1) * vfq_num;
+ else
+ qm->debug.curr_qm_qp_num = vfq_num;
+ }
+
+ writel(val, qm->io_base + QM_DFX_MB_CNT_VF);
+ writel(val, qm->io_base + QM_DFX_DB_CNT_VF);
+
+ tmp = val |
+ (readl(qm->io_base + QM_DFX_SQE_CNT_VF_SQN) & CURRENT_Q_MASK);
+ writel(tmp, qm->io_base + QM_DFX_SQE_CNT_VF_SQN);
+
+ tmp = val |
+ (readl(qm->io_base + QM_DFX_CQE_CNT_VF_CQN) & CURRENT_Q_MASK);
+ writel(tmp, qm->io_base + QM_DFX_CQE_CNT_VF_CQN);
+
+ return 0;
+}
+
+static u32 sec_clear_enable_read(struct sec_debug_file *file)
+{
+ struct hisi_qm *qm = file->qm;
+
+ return readl(qm->io_base + SEC_CTRL_CNT_CLR_CE) &
+ SEC_CTRL_CNT_CLR_CE_BIT;
+}
+
+static int sec_clear_enable_write(struct sec_debug_file *file, u32 val)
+{
+ struct hisi_qm *qm = file->qm;
+ u32 tmp;
+
+ if (val != 1 && val)
+ return -EINVAL;
+
+ tmp = (readl(qm->io_base + SEC_CTRL_CNT_CLR_CE) &
+ ~SEC_CTRL_CNT_CLR_CE_BIT) | val;
+ writel(tmp, qm->io_base + SEC_CTRL_CNT_CLR_CE);
+
+ return 0;
+}
+
+static ssize_t sec_debug_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct sec_debug_file *file = filp->private_data;
+ char tbuf[SEC_DBGFS_VAL_MAX_LEN];
+ u32 val;
+ int ret;
+
+ spin_lock_irq(&file->lock);
+
+ switch (file->index) {
+ case SEC_CURRENT_QM:
+ val = sec_current_qm_read(file);
+ break;
+ case SEC_CLEAR_ENABLE:
+ val = sec_clear_enable_read(file);
+ break;
+ default:
+ spin_unlock_irq(&file->lock);
+ return -EINVAL;
+ }
+
+ spin_unlock_irq(&file->lock);
+ ret = snprintf(tbuf, SEC_DBGFS_VAL_MAX_LEN, "%u\n", val);
+
+ return simple_read_from_buffer(buf, count, pos, tbuf, ret);
+}
+
+static ssize_t sec_debug_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct sec_debug_file *file = filp->private_data;
+ char tbuf[SEC_DBGFS_VAL_MAX_LEN];
+ unsigned long val;
+ int len, ret;
+
+ if (*pos != 0)
+ return 0;
+
+ if (count >= SEC_DBGFS_VAL_MAX_LEN)
+ return -ENOSPC;
+
+ len = simple_write_to_buffer(tbuf, SEC_DBGFS_VAL_MAX_LEN - 1,
+ pos, buf, count);
+ if (len < 0)
+ return len;
+
+ tbuf[len] = '\0';
+ if (kstrtoul(tbuf, 0, &val))
+ return -EFAULT;
+
+ spin_lock_irq(&file->lock);
+
+ switch (file->index) {
+ case SEC_CURRENT_QM:
+ ret = sec_current_qm_write(file, val);
+ if (ret)
+ goto err_input;
+ break;
+ case SEC_CLEAR_ENABLE:
+ ret = sec_clear_enable_write(file, val);
+ if (ret)
+ goto err_input;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_input;
+ }
+
+ spin_unlock_irq(&file->lock);
+
+ return count;
+
+ err_input:
+ spin_unlock_irq(&file->lock);
+ return ret;
+}
+
+static const struct file_operations sec_dbg_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = sec_debug_read,
+ .write = sec_debug_write,
+};
+
+static int sec_core_debug_init(struct sec_dev *sec)
+{
+ struct hisi_qm *qm = &sec->qm;
+ struct device *dev = &qm->pdev->dev;
+ struct sec_dfx *dfx = &sec->debug.dfx;
+ struct debugfs_regset32 *regset;
+ struct dentry *tmp_d, *tmp;
+
+ tmp_d = debugfs_create_dir("sec_dfx", sec->qm.debug.debug_root);
+ if (!tmp_d)
+ return -ENOENT;
+
+ regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
+ if (!regset)
+ return -ENOENT;
+
+ regset->regs = sec_dfx_regs;
+ regset->nregs = ARRAY_SIZE(sec_dfx_regs);
+ regset->base = qm->io_base;
+
+ tmp = debugfs_create_regset32("regs", 0444, tmp_d, regset);
+ if (!tmp)
+ return -ENOENT;
+
+ tmp = debugfs_create_u64("send_cnt", 0444, tmp_d, &dfx->send_cnt);
+ if (!tmp)
+ return -ENOENT;
+
+ tmp = debugfs_create_u64("recv_cnt", 0444, tmp_d, &dfx->recv_cnt);
+ if (!tmp)
+ return -ENOENT;
+
+ return 0;
+}
+
+static int sec_debug_init(struct sec_dev *sec)
+{
+ struct dentry *tmp;
+ int i;
+
+ for (i = SEC_CURRENT_QM; i < SEC_DEBUG_FILE_NUM; i++) {
+ spin_lock_init(&sec->debug.files[i].lock);
+ sec->debug.files[i].index = i;
+ sec->debug.files[i].qm = &sec->qm;
+
+ tmp = debugfs_create_file(sec_dbg_file_name[i], 0600,
+ sec->qm.debug.debug_root,
+ sec->debug.files + i,
+ &sec_dbg_fops);
+ if (!tmp)
+ return -ENOENT;
+ }
+
+ return sec_core_debug_init(sec);
+}
+
+static int sec_debugfs_init(struct sec_dev *sec)
+{
+ struct hisi_qm *qm = &sec->qm;
+ struct device *dev = &qm->pdev->dev;
+ struct dentry *dev_d;
+ int ret;
+
+ dev_d = debugfs_create_dir(dev_name(dev), sec_debugfs_root);
+ if (!dev_d)
+ return -ENOENT;
+
+ qm->debug.debug_root = dev_d;
+ ret = hisi_qm_debug_init(qm);
+ if (ret)
+ goto failed_to_create;
+
+ if (qm->pdev->device == SEC_PF_PCI_DEVICE_ID) {
+ ret = sec_debug_init(sec);
+ if (ret)
+ goto failed_to_create;
+ }
+
+ return 0;
+
+failed_to_create:
+ debugfs_remove_recursive(sec_debugfs_root);
+
+ return ret;
+}
+
+static void sec_debugfs_exit(struct sec_dev *sec)
+{
+ debugfs_remove_recursive(sec->qm.debug.debug_root);
+}
+
static int sec_pf_probe_init(struct sec_dev *sec)
{
struct hisi_qm *qm = &sec->qm;
@@ -430,6 +722,7 @@ static int sec_pf_probe_init(struct sec_dev *sec)
return ret;
sec_hw_error_init(sec);
+ sec_debug_regs_clear(qm);
return 0;
}
@@ -464,6 +757,7 @@ static int sec_probe_init(struct hisi_qm *qm, struct sec_dev *sec)
if (qm->fun_type == QM_HW_PF) {
qm->qp_base = SEC_PF_DEF_Q_BASE;
qm->qp_num = pf_q_num;
+ qm->debug.curr_qm_qp_num = pf_q_num;
return sec_pf_probe_init(sec);
} else if (qm->fun_type == QM_HW_VF) {
@@ -526,6 +820,10 @@ static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_probe_uninit;
}
+ ret = sec_debugfs_init(sec);
+ if (ret)
+ pci_warn(pdev, "Failed to init debugfs!\n");
+
sec_add_to_list(sec);
ret = sec_register_to_crypto();
@@ -538,6 +836,7 @@ static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
err_remove_from_list:
sec_remove_from_list(sec);
+ sec_debugfs_exit(sec);
hisi_qm_stop(qm);
err_probe_uninit:
@@ -665,8 +964,13 @@ static void sec_remove(struct pci_dev *pdev)
if (qm->fun_type == QM_HW_PF && sec->num_vfs)
(void)sec_sriov_disable(pdev);
+ sec_debugfs_exit(sec);
+
(void)hisi_qm_stop(qm);
+ if (qm->fun_type == QM_HW_PF)
+ sec_debug_regs_clear(qm);
+
sec_probe_uninit(sec);
sec_qm_uninit(qm);
@@ -761,12 +1065,30 @@ static struct pci_driver sec_pci_driver = {
.sriov_configure = sec_sriov_configure,
};
+static void sec_register_debugfs(void)
+{
+ if (!debugfs_initialized())
+ return;
+
+ sec_debugfs_root = debugfs_create_dir("hisi_sec2", NULL);
+ if (IS_ERR_OR_NULL(sec_debugfs_root))
+ sec_debugfs_root = NULL;
+}
+
+static void sec_unregister_debugfs(void)
+{
+ debugfs_remove_recursive(sec_debugfs_root);
+}
+
static int __init sec_init(void)
{
int ret;
+ sec_register_debugfs();
+
ret = pci_register_driver(&sec_pci_driver);
if (ret < 0) {
+ sec_unregister_debugfs();
pr_err("Failed to register pci driver.\n");
return ret;
}
@@ -777,6 +1099,7 @@ static int __init sec_init(void)
static void __exit sec_exit(void)
{
pci_unregister_driver(&sec_pci_driver);
+ sec_unregister_debugfs();
}
module_init(sec_init);
--
2.8.1
