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path: root/drivers/dma/idxd/sysfs.c
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Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
-rw-r--r--drivers/dma/idxd/sysfs.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 523ae0dff7..3a5ce477a8 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1197,12 +1197,35 @@ static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attrib
static struct device_attribute dev_attr_wq_enqcmds_retries =
__ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store);
+static ssize_t op_cap_show_common(struct device *dev, char *buf, unsigned long *opcap_bmap)
+{
+ ssize_t pos;
+ int i;
+
+ pos = 0;
+ for (i = IDXD_MAX_OPCAP_BITS/64 - 1; i >= 0; i--) {
+ unsigned long val = opcap_bmap[i];
+
+ /* On systems where direct user submissions are not safe, we need to clear out
+ * the BATCH capability from the capability mask in sysfs since we cannot support
+ * that command on such systems.
+ */
+ if (i == DSA_OPCODE_BATCH/64 && !confdev_to_idxd(dev)->user_submission_safe)
+ clear_bit(DSA_OPCODE_BATCH % 64, &val);
+
+ pos += sysfs_emit_at(buf, pos, "%*pb", 64, &val);
+ pos += sysfs_emit_at(buf, pos, "%c", i == 0 ? '\n' : ',');
+ }
+
+ return pos;
+}
+
static ssize_t wq_op_config_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct idxd_wq *wq = confdev_to_wq(dev);
- return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap);
+ return op_cap_show_common(dev, buf, wq->opcap_bmap);
}
static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask)
@@ -1455,7 +1478,7 @@ static ssize_t op_cap_show(struct device *dev,
{
struct idxd_device *idxd = confdev_to_idxd(dev);
- return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap);
+ return op_cap_show_common(dev, buf, idxd->opcap_bmap);
}
static DEVICE_ATTR_RO(op_cap);