| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1552997064-432700-11-git-send-email-dragan.cvetic@xilinx.com>
Date: Tue, 19 Mar 2019 12:04:22 +0000
From: Dragan Cvetic <dragan.cvetic@...inx.com>
To: <arnd@...db.de>, <gregkh@...uxfoundation.org>,
<michal.simek@...inx.com>, <linux-arm-kernel@...ts.infradead.org>
CC: <linux-kernel@...r.kernel.org>,
Dragan Cvetic <dragan.cvetic@...inx.com>,
Derek Kiernan <derek.kiernan@...inx.com>
Subject: [PATCH 10/12] misc: xilinx_sdfec: Add stats & status ioctls
SD-FEC statistic data are:
- count of data interface errors (isr_err_count)
- count of Correctable ECC errors (cecc_count)
- count of Uncorrectable ECC errors (uecc_count)
Add support:
1. clear stats ioctl callback which clears collected
statistic data,
2. get stats ioctl callback which reads a collected
statistic data,
3. set default configuration ioctl callback,
4. start ioctl callback enables SD-FEC HW,
5. stop ioctl callback disables SD-FEC HW.
In a failed state driver enables the following ioctls:
- get status
- get statistics
- clear stats
- set default SD-FEC device configuration
Reviewed-by: Michal Simek <michal.simek@...inx.com>
Tested-by: Santhosh Dyavanapally <SDYAVANA@...inx.com>
Tested by: Punnaiah Choudary Kalluri <punnaia@...inx.com>
Tested-by: Derek Kiernan <derek.kiernan@...inx.com>
Tested-by: Dragan Cvetic <dragan.cvetic@...inx.com>
Signed-off-by: Derek Kiernan <derek.kiernan@...inx.com>
Signed-off-by: Dragan Cvetic <dragan.cvetic@...inx.com>
---
drivers/misc/xilinx_sdfec.c | 128 +++++++++++++++++++++++++++++++++++++++
include/uapi/misc/xilinx_sdfec.h | 75 +++++++++++++++++++++++
2 files changed, 203 insertions(+)
diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index b48a881..4e29e29 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -201,6 +201,7 @@ struct xsdfec_clks {
* @dev: pointer to device struct
* @state: State of the SDFEC device
* @config: Configuration of the SDFEC device
+ * @intr_enabled: indicates IRQ enabled
* @state_updated: indicates State updated by interrupt handler
* @stats_updated: indicates Stats updated by interrupt handler
* @isr_err_count: Count of ISR errors
@@ -220,6 +221,7 @@ struct xsdfec_dev {
struct device *dev;
enum xsdfec_state state;
struct xsdfec_config config;
+ bool intr_enabled;
bool state_updated;
bool stats_updated;
atomic_t isr_err_count;
@@ -323,6 +325,28 @@ static int xsdfec_dev_release(struct inode *iptr, struct file *fptr)
return 0;
}
+static int xsdfec_get_status(struct xsdfec_dev *xsdfec, void __user *arg)
+{
+ struct xsdfec_status status;
+ int err;
+
+ status.fec_id = xsdfec->config.fec_id;
+ spin_lock_irq(&xsdfec->irq_lock);
+ status.state = xsdfec->state;
+ xsdfec->state_updated = false;
+ spin_unlock_irq(&xsdfec->irq_lock);
+ status.activity = (xsdfec_regread(xsdfec, XSDFEC_ACTIVE_ADDR) &
+ XSDFEC_IS_ACTIVITY_SET);
+
+ err = copy_to_user(arg, &status, sizeof(status));
+ if (err) {
+ dev_err(xsdfec->dev, "%s failed for SDFEC%d", __func__,
+ xsdfec->config.fec_id);
+ err = -EFAULT;
+ }
+ return err;
+}
+
static int xsdfec_get_config(struct xsdfec_dev *xsdfec, void __user *arg)
{
int err;
@@ -908,6 +932,83 @@ static int xsdfec_cfg_axi_streams(struct xsdfec_dev *xsdfec)
return 0;
}
+static int xsdfec_start(struct xsdfec_dev *xsdfec)
+{
+ u32 regread;
+
+ regread = xsdfec_regread(xsdfec, XSDFEC_FEC_CODE_ADDR);
+ regread &= 0x1;
+ if (regread != xsdfec->config.code) {
+ dev_err(xsdfec->dev,
+ "%s SDFEC HW code does not match driver code, reg %d, code %d",
+ __func__, regread, xsdfec->config.code);
+ return -EINVAL;
+ }
+
+ /* Set AXIS enable */
+ xsdfec_regwrite(xsdfec, XSDFEC_AXIS_ENABLE_ADDR,
+ XSDFEC_AXIS_ENABLE_MASK);
+ /* Done */
+ xsdfec->state = XSDFEC_STARTED;
+ return 0;
+}
+
+static int xsdfec_stop(struct xsdfec_dev *xsdfec)
+{
+ u32 regread;
+
+ if (xsdfec->state != XSDFEC_STARTED)
+ dev_err(xsdfec->dev, "Device not started correctly");
+ /* Disable AXIS_ENABLE Input interfaces only */
+ regread = xsdfec_regread(xsdfec, XSDFEC_AXIS_ENABLE_ADDR);
+ regread &= (~XSDFEC_AXIS_IN_ENABLE_MASK);
+ xsdfec_regwrite(xsdfec, XSDFEC_AXIS_ENABLE_ADDR, regread);
+ /* Stop */
+ xsdfec->state = XSDFEC_STOPPED;
+ return 0;
+}
+
+static int xsdfec_clear_stats(struct xsdfec_dev *xsdfec)
+{
+ atomic_set(&xsdfec->isr_err_count, 0);
+ atomic_set(&xsdfec->uecc_count, 0);
+ atomic_set(&xsdfec->cecc_count, 0);
+
+ return 0;
+}
+
+static int xsdfec_get_stats(struct xsdfec_dev *xsdfec, void __user *arg)
+{
+ int err;
+ struct xsdfec_stats user_stats;
+
+ spin_lock_irq(&xsdfec->irq_lock);
+ user_stats.isr_err_count = atomic_read(&xsdfec->isr_err_count);
+ user_stats.cecc_count = atomic_read(&xsdfec->cecc_count);
+ user_stats.uecc_count = atomic_read(&xsdfec->uecc_count);
+ xsdfec->stats_updated = false;
+ spin_unlock_irq(&xsdfec->irq_lock);
+
+ err = copy_to_user(arg, &user_stats, sizeof(user_stats));
+ if (err) {
+ dev_err(xsdfec->dev, "%s failed for SDFEC%d", __func__,
+ xsdfec->config.fec_id);
+ err = -EFAULT;
+ }
+
+ return err;
+}
+
+static int xsdfec_set_default_config(struct xsdfec_dev *xsdfec)
+{
+ /* Ensure registers are aligned with core configuration */
+ xsdfec_regwrite(xsdfec, XSDFEC_FEC_CODE_ADDR, xsdfec->config.code);
+ xsdfec_cfg_axi_streams(xsdfec);
+ update_config_from_hw(xsdfec);
+
+ return 0;
+}
+
static long xsdfec_dev_ioctl(struct file *fptr, unsigned int cmd,
unsigned long data)
{
@@ -919,6 +1020,15 @@ static long xsdfec_dev_ioctl(struct file *fptr, unsigned int cmd,
if (!xsdfec)
return rval;
+ /* In failed state allow only reset and get status IOCTLs */
+ if (xsdfec->state == XSDFEC_NEEDS_RESET &&
+ (cmd != XSDFEC_SET_DEFAULT_CONFIG && cmd != XSDFEC_GET_STATUS &&
+ cmd != XSDFEC_GET_STATS && cmd != XSDFEC_CLEAR_STATS)) {
+ dev_err(xsdfec->dev, "SDFEC%d in failed state. Reset Required",
+ xsdfec->config.fec_id);
+ return -EPERM;
+ }
+
if (_IOC_TYPE(cmd) != XSDFEC_MAGIC) {
dev_err(xsdfec->dev, "Not a xilinx sdfec ioctl");
return -ENOTTY;
@@ -946,9 +1056,27 @@ static long xsdfec_dev_ioctl(struct file *fptr, unsigned int cmd,
}
switch (cmd) {
+ case XSDFEC_START_DEV:
+ rval = xsdfec_start(xsdfec);
+ break;
+ case XSDFEC_STOP_DEV:
+ rval = xsdfec_stop(xsdfec);
+ break;
+ case XSDFEC_CLEAR_STATS:
+ rval = xsdfec_clear_stats(xsdfec);
+ break;
+ case XSDFEC_GET_STATS:
+ rval = xsdfec_get_stats(xsdfec, arg);
+ break;
+ case XSDFEC_GET_STATUS:
+ rval = xsdfec_get_status(xsdfec, arg);
+ break;
case XSDFEC_GET_CONFIG:
rval = xsdfec_get_config(xsdfec, arg);
break;
+ case XSDFEC_SET_DEFAULT_CONFIG:
+ rval = xsdfec_set_default_config(xsdfec);
+ break;
case XSDFEC_SET_IRQ:
rval = xsdfec_set_irq(xsdfec, arg);
break;
diff --git a/include/uapi/misc/xilinx_sdfec.h b/include/uapi/misc/xilinx_sdfec.h
index 8dfada9..df47995 100644
--- a/include/uapi/misc/xilinx_sdfec.h
+++ b/include/uapi/misc/xilinx_sdfec.h
@@ -235,6 +235,21 @@ struct xsdfec_config {
};
/**
+ * struct xsdfec_stats - Stats retrived by ioctl XSDFEC_GET_STATS. Used
+ * to buffer atomic_t variables from struct
+ * xsdfec_dev. Counts are accumulated until
+ * the user clears them.
+ * @isr_err_count: Count of ISR errors
+ * @cecc_count: Count of Correctable ECC errors (SBE)
+ * @uecc_count: Count of Uncorrectable ECC errors (MBE)
+ */
+struct xsdfec_stats {
+ u32 isr_err_count;
+ u32 cecc_count;
+ u32 uecc_count;
+};
+
+/**
* struct xsdfec_ldpc_param_table_sizes - Used to store sizes of SD-FEC table
* entries for an individual LPDC code
* parameter.
@@ -274,6 +289,32 @@ xsdfec_calculate_shared_ldpc_table_entry_size(struct xsdfec_ldpc_params *ldpc,
*/
#define XSDFEC_MAGIC 'f'
/**
+ * DOC: XSDFEC_START_DEV
+ *
+ * @Description
+ *
+ * ioctl to start SD-FEC core
+ *
+ * This fails if the XSDFEC_SET_ORDER ioctl has not been previously called
+ */
+#define XSDFEC_START_DEV _IO(XSDFEC_MAGIC, 0)
+/**
+ * DOC: XSDFEC_STOP_DEV
+ *
+ * @Description
+ *
+ * ioctl to stop the SD-FEC core
+ */
+#define XSDFEC_STOP_DEV _IO(XSDFEC_MAGIC, 1)
+/**
+ * DOC: XSDFEC_GET_STATUS
+ *
+ * @Description
+ *
+ * ioctl that returns status of SD-FEC core
+ */
+#define XSDFEC_GET_STATUS _IOR(XSDFEC_MAGIC, 2, struct xsdfec_status *)
+/**
* DOC: XSDFEC_SET_IRQ
* @Parameters
*
@@ -392,4 +433,38 @@ xsdfec_calculate_shared_ldpc_table_entry_size(struct xsdfec_ldpc_params *ldpc,
* ioctl that determines if SD-FEC is processing data
*/
#define XSDFEC_IS_ACTIVE _IOR(XSDFEC_MAGIC, 10, bool *)
+/**
+ * DOC: XSDFEC_CLEAR_STATS
+ *
+ * @Description
+ *
+ * ioctl that clears error stats collected during interrupts
+ */
+#define XSDFEC_CLEAR_STATS _IO(XSDFEC_MAGIC, 11)
+/**
+ * DOC: XSDFEC_GET_STATS
+ * @Parameters
+ *
+ * @struct xsdfec_stats *
+ * Pointer to the &struct xsdfec_stats that will contain the updated stats
+ * values
+ *
+ * @Description
+ *
+ * ioctl that returns SD-FEC core stats
+ *
+ * This can only be used when the driver is in the XSDFEC_STOPPED state
+ */
+#define XSDFEC_GET_STATS _IOR(XSDFEC_MAGIC, 12, struct xsdfec_stats *)
+/**
+ * DOC: XSDFEC_SET_DEFAULT_CONFIG
+ *
+ * @Description
+ *
+ * ioctl that returns SD-FEC core to default config, use after a reset
+ *
+ * This can only be used when the driver is in the XSDFEC_STOPPED state
+ */
+#define XSDFEC_SET_DEFAULT_CONFIG _IO(XSDFEC_MAGIC, 13)
+
#endif /* __XILINX_SDFEC_H__ */
--
2.7.4
This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.
Powered by blists - more mailing lists