scsi: hisi_sas: Add BIST support for phy loopback

Add BIST (built in self test) support for phy loopback.

Through the new debugfs interface, the user can configure loopback
mode/linkrate/phy id/code mode before enabling it. And also user can
enable/disable BIST function.

Link: https://lore.kernel.org/r/1567774537-20003-13-git-send-email-john.garry@huawei.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2019-09-06 20:55:36 +08:00 committed by Martin K. Petersen
parent 7ec7082c57
commit 97b151e758
3 changed files with 543 additions and 0 deletions

View File

@ -310,6 +310,7 @@ struct hisi_sas_hw {
int delay_ms, int timeout_ms);
void (*snapshot_prepare)(struct hisi_hba *hisi_hba);
void (*snapshot_restore)(struct hisi_hba *hisi_hba);
int (*set_bist)(struct hisi_hba *hisi_hba, bool enable);
void (*read_iost_itct_cache)(struct hisi_hba *hisi_hba,
enum hisi_sas_debugfs_cache_type type,
u32 *cache);
@ -391,6 +392,14 @@ struct hisi_hba {
int cq_nvecs;
unsigned int *reply_map;
/* bist */
enum sas_linkrate debugfs_bist_linkrate;
int debugfs_bist_code_mode;
int debugfs_bist_phy_no;
int debugfs_bist_mode;
u32 debugfs_bist_cnt;
int debugfs_bist_enable;
/* debugfs memories */
/* Put Global AXI and RAS Register into register array */
u32 *debugfs_regs[DEBUGFS_REGS_NUM];
@ -404,6 +413,7 @@ struct hisi_hba {
struct dentry *debugfs_dir;
struct dentry *debugfs_dump_dentry;
struct dentry *debugfs_bist_dentry;
bool debugfs_snapshot;
};

View File

@ -3293,6 +3293,382 @@ static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = {
.owner = THIS_MODULE,
};
enum {
HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL = 0,
HISI_SAS_BIST_LOOPBACK_MODE_SERDES,
HISI_SAS_BIST_LOOPBACK_MODE_REMOTE,
};
enum {
HISI_SAS_BIST_CODE_MODE_PRBS7 = 0,
HISI_SAS_BIST_CODE_MODE_PRBS23,
HISI_SAS_BIST_CODE_MODE_PRBS31,
HISI_SAS_BIST_CODE_MODE_JTPAT,
HISI_SAS_BIST_CODE_MODE_CJTPAT,
HISI_SAS_BIST_CODE_MODE_SCRAMBED_0,
HISI_SAS_BIST_CODE_MODE_TRAIN,
HISI_SAS_BIST_CODE_MODE_TRAIN_DONE,
HISI_SAS_BIST_CODE_MODE_HFTP,
HISI_SAS_BIST_CODE_MODE_MFTP,
HISI_SAS_BIST_CODE_MODE_LFTP,
HISI_SAS_BIST_CODE_MODE_FIXED_DATA,
};
static const struct {
int value;
char *name;
} hisi_sas_debugfs_loop_linkrate[] = {
{ SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
{ SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
{ SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
{ SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
};
static int hisi_sas_debugfs_bist_linkrate_show(struct seq_file *s, void *p)
{
struct hisi_hba *hisi_hba = s->private;
int i;
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
int match = (hisi_hba->debugfs_bist_linkrate ==
hisi_sas_debugfs_loop_linkrate[i].value);
seq_printf(s, "%s%s%s ", match ? "[" : "",
hisi_sas_debugfs_loop_linkrate[i].name,
match ? "]" : "");
}
seq_puts(s, "\n");
return 0;
}
static ssize_t hisi_sas_debugfs_bist_linkrate_write(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct seq_file *m = filp->private_data;
struct hisi_hba *hisi_hba = m->private;
char kbuf[16] = {}, *pkbuf;
bool found = false;
int i;
if (hisi_hba->debugfs_bist_enable)
return -EPERM;
if (count >= sizeof(kbuf))
return -EOVERFLOW;
if (copy_from_user(kbuf, buf, count))
return -EINVAL;
pkbuf = strstrip(kbuf);
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_linkrate); i++) {
if (!strncmp(hisi_sas_debugfs_loop_linkrate[i].name,
pkbuf, 16)) {
hisi_hba->debugfs_bist_linkrate =
hisi_sas_debugfs_loop_linkrate[i].value;
found = true;
break;
}
}
if (!found)
return -EINVAL;
return count;
}
static int hisi_sas_debugfs_bist_linkrate_open(struct inode *inode,
struct file *filp)
{
return single_open(filp, hisi_sas_debugfs_bist_linkrate_show,
inode->i_private);
}
static const struct file_operations hisi_sas_debugfs_bist_linkrate_ops = {
.open = hisi_sas_debugfs_bist_linkrate_open,
.read = seq_read,
.write = hisi_sas_debugfs_bist_linkrate_write,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct {
int value;
char *name;
} hisi_sas_debugfs_loop_code_mode[] = {
{ HISI_SAS_BIST_CODE_MODE_PRBS7, "PRBS7" },
{ HISI_SAS_BIST_CODE_MODE_PRBS23, "PRBS23" },
{ HISI_SAS_BIST_CODE_MODE_PRBS31, "PRBS31" },
{ HISI_SAS_BIST_CODE_MODE_JTPAT, "JTPAT" },
{ HISI_SAS_BIST_CODE_MODE_CJTPAT, "CJTPAT" },
{ HISI_SAS_BIST_CODE_MODE_SCRAMBED_0, "SCRAMBED_0" },
{ HISI_SAS_BIST_CODE_MODE_TRAIN, "TRAIN" },
{ HISI_SAS_BIST_CODE_MODE_TRAIN_DONE, "TRAIN_DONE" },
{ HISI_SAS_BIST_CODE_MODE_HFTP, "HFTP" },
{ HISI_SAS_BIST_CODE_MODE_MFTP, "MFTP" },
{ HISI_SAS_BIST_CODE_MODE_LFTP, "LFTP" },
{ HISI_SAS_BIST_CODE_MODE_FIXED_DATA, "FIXED_DATA" },
};
static int hisi_sas_debugfs_bist_code_mode_show(struct seq_file *s, void *p)
{
struct hisi_hba *hisi_hba = s->private;
int i;
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
int match = (hisi_hba->debugfs_bist_code_mode ==
hisi_sas_debugfs_loop_code_mode[i].value);
seq_printf(s, "%s%s%s ", match ? "[" : "",
hisi_sas_debugfs_loop_code_mode[i].name,
match ? "]" : "");
}
seq_puts(s, "\n");
return 0;
}
static ssize_t hisi_sas_debugfs_bist_code_mode_write(struct file *filp,
const char __user *buf,
size_t count,
loff_t *ppos)
{
struct seq_file *m = filp->private_data;
struct hisi_hba *hisi_hba = m->private;
char kbuf[16] = {}, *pkbuf;
bool found = false;
int i;
if (hisi_hba->debugfs_bist_enable)
return -EPERM;
if (count >= sizeof(kbuf))
return -EINVAL;
if (copy_from_user(kbuf, buf, count))
return -EOVERFLOW;
pkbuf = strstrip(kbuf);
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_code_mode); i++) {
if (!strncmp(hisi_sas_debugfs_loop_code_mode[i].name,
pkbuf, 16)) {
hisi_hba->debugfs_bist_code_mode =
hisi_sas_debugfs_loop_code_mode[i].value;
found = true;
break;
}
}
if (!found)
return -EINVAL;
return count;
}
static int hisi_sas_debugfs_bist_code_mode_open(struct inode *inode,
struct file *filp)
{
return single_open(filp, hisi_sas_debugfs_bist_code_mode_show,
inode->i_private);
}
static const struct file_operations hisi_sas_debugfs_bist_code_mode_ops = {
.open = hisi_sas_debugfs_bist_code_mode_open,
.read = seq_read,
.write = hisi_sas_debugfs_bist_code_mode_write,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static ssize_t hisi_sas_debugfs_bist_phy_write(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct seq_file *m = filp->private_data;
struct hisi_hba *hisi_hba = m->private;
unsigned int phy_no;
int val;
if (hisi_hba->debugfs_bist_enable)
return -EPERM;
val = kstrtouint_from_user(buf, count, 0, &phy_no);
if (val)
return val;
if (phy_no >= hisi_hba->n_phy)
return -EINVAL;
hisi_hba->debugfs_bist_phy_no = phy_no;
return count;
}
static int hisi_sas_debugfs_bist_phy_show(struct seq_file *s, void *p)
{
struct hisi_hba *hisi_hba = s->private;
seq_printf(s, "%d\n", hisi_hba->debugfs_bist_phy_no);
return 0;
}
static int hisi_sas_debugfs_bist_phy_open(struct inode *inode,
struct file *filp)
{
return single_open(filp, hisi_sas_debugfs_bist_phy_show,
inode->i_private);
}
static const struct file_operations hisi_sas_debugfs_bist_phy_ops = {
.open = hisi_sas_debugfs_bist_phy_open,
.read = seq_read,
.write = hisi_sas_debugfs_bist_phy_write,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct {
int value;
char *name;
} hisi_sas_debugfs_loop_modes[] = {
{ HISI_SAS_BIST_LOOPBACK_MODE_DIGITAL, "digial" },
{ HISI_SAS_BIST_LOOPBACK_MODE_SERDES, "serdes" },
{ HISI_SAS_BIST_LOOPBACK_MODE_REMOTE, "remote" },
};
static int hisi_sas_debugfs_bist_mode_show(struct seq_file *s, void *p)
{
struct hisi_hba *hisi_hba = s->private;
int i;
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
int match = (hisi_hba->debugfs_bist_mode ==
hisi_sas_debugfs_loop_modes[i].value);
seq_printf(s, "%s%s%s ", match ? "[" : "",
hisi_sas_debugfs_loop_modes[i].name,
match ? "]" : "");
}
seq_puts(s, "\n");
return 0;
}
static ssize_t hisi_sas_debugfs_bist_mode_write(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct seq_file *m = filp->private_data;
struct hisi_hba *hisi_hba = m->private;
char kbuf[16] = {}, *pkbuf;
bool found = false;
int i;
if (hisi_hba->debugfs_bist_enable)
return -EPERM;
if (count >= sizeof(kbuf))
return -EINVAL;
if (copy_from_user(kbuf, buf, count))
return -EOVERFLOW;
pkbuf = strstrip(kbuf);
for (i = 0; i < ARRAY_SIZE(hisi_sas_debugfs_loop_modes); i++) {
if (!strncmp(hisi_sas_debugfs_loop_modes[i].name, pkbuf, 16)) {
hisi_hba->debugfs_bist_mode =
hisi_sas_debugfs_loop_modes[i].value;
found = true;
break;
}
}
if (!found)
return -EINVAL;
return count;
}
static int hisi_sas_debugfs_bist_mode_open(struct inode *inode,
struct file *filp)
{
return single_open(filp, hisi_sas_debugfs_bist_mode_show,
inode->i_private);
}
static const struct file_operations hisi_sas_debugfs_bist_mode_ops = {
.open = hisi_sas_debugfs_bist_mode_open,
.read = seq_read,
.write = hisi_sas_debugfs_bist_mode_write,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static ssize_t hisi_sas_debugfs_bist_enable_write(struct file *filp,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct seq_file *m = filp->private_data;
struct hisi_hba *hisi_hba = m->private;
unsigned int enable;
int val;
val = kstrtouint_from_user(buf, count, 0, &enable);
if (val)
return val;
if (enable > 1)
return -EINVAL;
if (enable == hisi_hba->debugfs_bist_enable)
return count;
if (!hisi_hba->hw->set_bist)
return -EPERM;
val = hisi_hba->hw->set_bist(hisi_hba, enable);
if (val < 0)
return val;
hisi_hba->debugfs_bist_enable = enable;
return count;
}
static int hisi_sas_debugfs_bist_enable_show(struct seq_file *s, void *p)
{
struct hisi_hba *hisi_hba = s->private;
seq_printf(s, "%d\n", hisi_hba->debugfs_bist_enable);
return 0;
}
static int hisi_sas_debugfs_bist_enable_open(struct inode *inode,
struct file *filp)
{
return single_open(filp, hisi_sas_debugfs_bist_enable_show,
inode->i_private);
}
static const struct file_operations hisi_sas_debugfs_bist_enable_ops = {
.open = hisi_sas_debugfs_bist_enable_open,
.read = seq_read,
.write = hisi_sas_debugfs_bist_enable_write,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
void hisi_sas_debugfs_work_handler(struct work_struct *work)
{
struct hisi_hba *hisi_hba =
@ -3419,6 +3795,34 @@ fail:
return -ENOMEM;
}
void hisi_sas_debugfs_bist_init(struct hisi_hba *hisi_hba)
{
hisi_hba->debugfs_bist_dentry =
debugfs_create_dir("bist", hisi_hba->debugfs_dir);
debugfs_create_file("link_rate", 0600,
hisi_hba->debugfs_bist_dentry, hisi_hba,
&hisi_sas_debugfs_bist_linkrate_ops);
debugfs_create_file("code_mode", 0600,
hisi_hba->debugfs_bist_dentry, hisi_hba,
&hisi_sas_debugfs_bist_code_mode_ops);
debugfs_create_file("phy_id", 0600, hisi_hba->debugfs_bist_dentry,
hisi_hba, &hisi_sas_debugfs_bist_phy_ops);
debugfs_create_u32("cnt", 0600, hisi_hba->debugfs_bist_dentry,
&hisi_hba->debugfs_bist_cnt);
debugfs_create_file("loopback_mode", 0600,
hisi_hba->debugfs_bist_dentry,
hisi_hba, &hisi_sas_debugfs_bist_mode_ops);
debugfs_create_file("enable", 0600, hisi_hba->debugfs_bist_dentry,
hisi_hba, &hisi_sas_debugfs_bist_enable_ops);
hisi_hba->debugfs_bist_linkrate = SAS_LINK_RATE_1_5_GBPS;
}
void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
@ -3430,6 +3834,9 @@ void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
hisi_hba,
&hisi_sas_debugfs_trigger_dump_fops);
/* create bist structures */
hisi_sas_debugfs_bist_init(hisi_hba);
if (hisi_sas_debugfs_alloc(hisi_hba)) {
debugfs_remove_recursive(hisi_hba->debugfs_dir);
dev_dbg(dev, "failed to init debugfs!\n");

View File

@ -191,12 +191,30 @@
#define PHY_CFG_PHY_RST_OFF 3
#define PHY_CFG_PHY_RST_MSK (0x1 << PHY_CFG_PHY_RST_OFF)
#define PROG_PHY_LINK_RATE (PORT_BASE + 0x8)
#define CFG_PROG_PHY_LINK_RATE_OFF 8
#define CFG_PROG_PHY_LINK_RATE_MSK (0xf << CFG_PROG_PHY_LINK_RATE_OFF)
#define PHY_CTRL (PORT_BASE + 0x14)
#define PHY_CTRL_RESET_OFF 0
#define PHY_CTRL_RESET_MSK (0x1 << PHY_CTRL_RESET_OFF)
#define CMD_HDR_PIR_OFF 8
#define CMD_HDR_PIR_MSK (0x1 << CMD_HDR_PIR_OFF)
#define SERDES_CFG (PORT_BASE + 0x1c)
#define CFG_ALOS_CHK_DISABLE_OFF 9
#define CFG_ALOS_CHK_DISABLE_MSK (0x1 << CFG_ALOS_CHK_DISABLE_OFF)
#define SAS_PHY_BIST_CTRL (PORT_BASE + 0x2c)
#define CFG_BIST_MODE_SEL_OFF 0
#define CFG_BIST_MODE_SEL_MSK (0xf << CFG_BIST_MODE_SEL_OFF)
#define CFG_LOOP_TEST_MODE_OFF 14
#define CFG_LOOP_TEST_MODE_MSK (0x3 << CFG_LOOP_TEST_MODE_OFF)
#define CFG_RX_BIST_EN_OFF 16
#define CFG_RX_BIST_EN_MSK (0x1 << CFG_RX_BIST_EN_OFF)
#define CFG_TX_BIST_EN_OFF 17
#define CFG_TX_BIST_EN_MSK (0x1 << CFG_TX_BIST_EN_OFF)
#define CFG_BIST_TEST_OFF 18
#define CFG_BIST_TEST_MSK (0x1 << CFG_BIST_TEST_OFF)
#define SAS_PHY_BIST_CODE (PORT_BASE + 0x30)
#define SAS_PHY_BIST_CODE1 (PORT_BASE + 0x34)
#define SAS_BIST_ERR_CNT (PORT_BASE + 0x38)
#define SL_CFG (PORT_BASE + 0x84)
#define AIP_LIMIT (PORT_BASE + 0x90)
#define SL_CONTROL (PORT_BASE + 0x94)
@ -2923,6 +2941,113 @@ static void read_iost_itct_cache_v3_hw(struct hisi_hba *hisi_hba,
buf[i] = hisi_sas_read32(hisi_hba, TAB_DFX);
}
static void hisi_sas_bist_test_prep_v3_hw(struct hisi_hba *hisi_hba)
{
u32 reg_val;
int phy_id = hisi_hba->debugfs_bist_phy_no;
/* disable PHY */
hisi_sas_phy_enable(hisi_hba, phy_id, 0);
/* disable ALOS */
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id, SERDES_CFG);
reg_val |= CFG_ALOS_CHK_DISABLE_MSK;
hisi_sas_phy_write32(hisi_hba, phy_id, SERDES_CFG, reg_val);
}
static void hisi_sas_bist_test_restore_v3_hw(struct hisi_hba *hisi_hba)
{
u32 reg_val;
int phy_id = hisi_hba->debugfs_bist_phy_no;
/* disable loopback */
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id, SAS_PHY_BIST_CTRL);
reg_val &= ~(CFG_RX_BIST_EN_MSK | CFG_TX_BIST_EN_MSK |
CFG_BIST_TEST_MSK);
hisi_sas_phy_write32(hisi_hba, phy_id, SAS_PHY_BIST_CTRL, reg_val);
/* enable ALOS */
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id, SERDES_CFG);
reg_val &= ~CFG_ALOS_CHK_DISABLE_MSK;
hisi_sas_phy_write32(hisi_hba, phy_id, SERDES_CFG, reg_val);
/* restore the linkrate */
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id, PROG_PHY_LINK_RATE);
/* init OOB link rate as 1.5 Gbits */
reg_val &= ~CFG_PROG_PHY_LINK_RATE_MSK;
reg_val |= (0x8 << CFG_PROG_PHY_LINK_RATE_OFF);
hisi_sas_phy_write32(hisi_hba, phy_id, PROG_PHY_LINK_RATE, reg_val);
/* enable PHY */
hisi_sas_phy_enable(hisi_hba, phy_id, 1);
}
#define SAS_PHY_BIST_CODE_INIT 0x1
#define SAS_PHY_BIST_CODE1_INIT 0X80
static int debugfs_set_bist_v3_hw(struct hisi_hba *hisi_hba, bool enable)
{
u32 reg_val, mode_tmp;
u32 linkrate = hisi_hba->debugfs_bist_linkrate;
u32 phy_id = hisi_hba->debugfs_bist_phy_no;
u32 code_mode = hisi_hba->debugfs_bist_code_mode;
u32 path_mode = hisi_hba->debugfs_bist_mode;
struct device *dev = hisi_hba->dev;
dev_info(dev, "BIST info:linkrate=%d phy_id=%d code_mode=%d path_mode=%d\n",
linkrate, phy_id, code_mode, path_mode);
mode_tmp = path_mode ? 2 : 1;
if (enable) {
/* some preparations before bist test */
hisi_sas_bist_test_prep_v3_hw(hisi_hba);
/* set linkrate of bit test*/
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id,
PROG_PHY_LINK_RATE);
reg_val &= ~CFG_PROG_PHY_LINK_RATE_MSK;
reg_val |= (linkrate << CFG_PROG_PHY_LINK_RATE_OFF);
hisi_sas_phy_write32(hisi_hba, phy_id,
PROG_PHY_LINK_RATE, reg_val);
/* set code mode of bit test */
reg_val = hisi_sas_phy_read32(hisi_hba, phy_id,
SAS_PHY_BIST_CTRL);
reg_val &= ~(CFG_BIST_MODE_SEL_MSK |
CFG_LOOP_TEST_MODE_MSK |
CFG_RX_BIST_EN_MSK |
CFG_TX_BIST_EN_MSK |
CFG_BIST_TEST_MSK);
reg_val |= ((code_mode << CFG_BIST_MODE_SEL_OFF) |
(mode_tmp << CFG_LOOP_TEST_MODE_OFF) |
CFG_BIST_TEST_MSK);
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CTRL, reg_val);
mdelay(100);
reg_val |= (CFG_RX_BIST_EN_MSK | CFG_TX_BIST_EN_MSK);
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CTRL, reg_val);
/* set the bist init value */
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CODE,
SAS_PHY_BIST_CODE_INIT);
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CODE1,
SAS_PHY_BIST_CODE1_INIT);
/* clear error bit */
mdelay(100);
hisi_sas_phy_read32(hisi_hba, phy_id, SAS_BIST_ERR_CNT);
} else {
/* disable bist test and recover it */
hisi_hba->debugfs_bist_cnt += hisi_sas_phy_read32(hisi_hba,
phy_id, SAS_BIST_ERR_CNT);
hisi_sas_bist_test_restore_v3_hw(hisi_hba);
}
return 0;
}
static struct scsi_host_template sht_v3_hw = {
.name = DRV_NAME,
.module = THIS_MODULE,
@ -2977,6 +3102,7 @@ static const struct hisi_sas_hw hisi_sas_v3_hw = {
.snapshot_prepare = debugfs_snapshot_prepare_v3_hw,
.snapshot_restore = debugfs_snapshot_restore_v3_hw,
.read_iost_itct_cache = read_iost_itct_cache_v3_hw,
.set_bist = debugfs_set_bist_v3_hw,
};
static struct Scsi_Host *