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-rw-r--r--drivers/dma/idxd/cdev.c7
-rw-r--r--drivers/dma/idxd/dma.c6
-rw-r--r--drivers/dma/idxd/idxd.h9
-rw-r--r--drivers/dma/idxd/irq.c4
-rw-r--r--drivers/dma/idxd/registers.h12
-rw-r--r--drivers/dma/idxd/sysfs.c34
6 files changed, 65 insertions, 7 deletions
diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index d32deb9b4e..0423655f5a 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -509,6 +509,7 @@ void idxd_wq_del_cdev(struct idxd_wq *wq)
static int idxd_user_drv_probe(struct idxd_dev *idxd_dev)
{
+ struct device *dev = &idxd_dev->conf_dev;
struct idxd_wq *wq = idxd_dev_to_wq(idxd_dev);
struct idxd_device *idxd = wq->idxd;
int rc;
@@ -536,6 +537,12 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev)
mutex_lock(&wq->wq_lock);
+ if (!idxd_wq_driver_name_match(wq, dev)) {
+ idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME;
+ rc = -ENODEV;
+ goto wq_err;
+ }
+
wq->wq = create_workqueue(dev_name(wq_confdev(wq)));
if (!wq->wq) {
rc = -ENOMEM;
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c
index 07623fb0f5..47a01893cf 100644
--- a/drivers/dma/idxd/dma.c
+++ b/drivers/dma/idxd/dma.c
@@ -306,6 +306,12 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev)
return -ENXIO;
mutex_lock(&wq->wq_lock);
+ if (!idxd_wq_driver_name_match(wq, dev)) {
+ idxd->cmd_status = IDXD_SCMD_WQ_NO_DRV_NAME;
+ rc = -ENODEV;
+ goto err;
+ }
+
wq->type = IDXD_WQT_KERNEL;
rc = drv_enable_wq(wq);
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index e269ca1f48..1e89c80a07 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -159,6 +159,8 @@ struct idxd_cdev {
int minor;
};
+#define DRIVER_NAME_SIZE 128
+
#define IDXD_ALLOCATED_BATCH_SIZE 128U
#define WQ_NAME_SIZE 1024
#define WQ_TYPE_SIZE 10
@@ -227,6 +229,8 @@ struct idxd_wq {
/* Lock to protect upasid_xa access. */
struct mutex uc_lock;
struct xarray upasid_xa;
+
+ char driver_name[DRIVER_NAME_SIZE + 1];
};
struct idxd_engine {
@@ -646,6 +650,11 @@ static inline void idxd_wqcfg_set_max_batch_shift(int idxd_type, union wqcfg *wq
wqcfg->max_batch_shift = max_batch_shift;
}
+static inline int idxd_wq_driver_name_match(struct idxd_wq *wq, struct device *dev)
+{
+ return (strncmp(wq->driver_name, dev->driver->name, strlen(dev->driver->name)) == 0);
+}
+
int __must_check __idxd_driver_register(struct idxd_device_driver *idxd_drv,
struct module *module, const char *mod_name);
#define idxd_driver_register(driver) \
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index b501320a9c..2183d7f9cd 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -434,8 +434,8 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
val |= IDXD_INTC_ERR;
for (i = 0; i < 4; i++)
- dev_warn(dev, "err[%d]: %#16.16llx\n",
- i, idxd->sw_err.bits[i]);
+ dev_warn_ratelimited(dev, "err[%d]: %#16.16llx\n",
+ i, idxd->sw_err.bits[i]);
err = true;
}
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index 7b54a3939e..315c004f58 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h
@@ -440,12 +440,14 @@ union wqcfg {
/*
* This macro calculates the offset into the GRPCFG register
* idxd - struct idxd *
- * n - wq id
- * ofs - the index of the 32b dword for the config register
+ * n - group id
+ * ofs - the index of the 64b qword for the config register
*
- * The WQCFG register block is divided into groups per each wq. The n index
- * allows us to move to the register group that's for that particular wq.
- * Each register is 32bits. The ofs gives us the number of register to access.
+ * The GRPCFG register block is divided into three sub-registers, which
+ * are GRPWQCFG, GRPENGCFG and GRPFLGCFG. The n index allows us to move
+ * to the register block that contains the three sub-registers.
+ * Each register block is 64bits. And the ofs gives us the offset
+ * within the GRPWQCFG register to access.
*/
#define GRPWQCFG_OFFSET(idxd_dev, n, ofs) ((idxd_dev)->grpcfg_offset +\
(n) * GRPCFG_SIZE + sizeof(u64) * (ofs))
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 7caba90d85..523ae0dff7 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1259,6 +1259,39 @@ err:
static struct device_attribute dev_attr_wq_op_config =
__ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
+static ssize_t wq_driver_name_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct idxd_wq *wq = confdev_to_wq(dev);
+
+ return sysfs_emit(buf, "%s\n", wq->driver_name);
+}
+
+static ssize_t wq_driver_name_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct idxd_wq *wq = confdev_to_wq(dev);
+ char *input, *pos;
+
+ if (wq->state != IDXD_WQ_DISABLED)
+ return -EPERM;
+
+ if (strlen(buf) > DRIVER_NAME_SIZE || strlen(buf) == 0)
+ return -EINVAL;
+
+ input = kstrndup(buf, count, GFP_KERNEL);
+ if (!input)
+ return -ENOMEM;
+
+ pos = strim(input);
+ memset(wq->driver_name, 0, DRIVER_NAME_SIZE + 1);
+ sprintf(wq->driver_name, "%s", pos);
+ kfree(input);
+ return count;
+}
+
+static struct device_attribute dev_attr_wq_driver_name =
+ __ATTR(driver_name, 0644, wq_driver_name_show, wq_driver_name_store);
+
static struct attribute *idxd_wq_attributes[] = {
&dev_attr_wq_clients.attr,
&dev_attr_wq_state.attr,
@@ -1278,6 +1311,7 @@ static struct attribute *idxd_wq_attributes[] = {
&dev_attr_wq_occupancy.attr,
&dev_attr_wq_enqcmds_retries.attr,
&dev_attr_wq_op_config.attr,
+ &dev_attr_wq_driver_name.attr,
NULL,
};