diff options
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-dma-idxd | 7 | ||||
| -rw-r--r-- | drivers/dma/idxd/registers.h | 3 | ||||
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 19 |
3 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index d431e2d00472..adb0c93e8dfc 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -211,6 +211,13 @@ Contact: dmaengine@vger.kernel.org Description: Indicate whether ATS disable is turned on for the workqueue. 0 indicates ATS is on, and 1 indicates ATS is off for the workqueue. +What: /sys/bus/dsa/devices/wq<m>.<n>/occupancy +Date May 25, 2021 +KernelVersion: 5.14.0 +Contact: dmaengine@vger.kernel.org +Description: Show the current number of entries in this WQ if WQ Occupancy + Support bit WQ capabilities is 1. + What: /sys/bus/dsa/devices/engine<m>.<n>/group_id Date: Oct 25, 2019 KernelVersion: 5.6.0 diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h index c970c3f025f0..7343a8f48819 100644 --- a/drivers/dma/idxd/registers.h +++ b/drivers/dma/idxd/registers.h @@ -349,6 +349,9 @@ union wqcfg { } __packed; #define WQCFG_PASID_IDX 2 +#define WQCFG_OCCUP_IDX 6 + +#define WQCFG_OCCUP_MASK 0xffff /* * This macro calculates the offset into the WQCFG register diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 71cd73fefec6..a193de32536d 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1246,6 +1246,24 @@ static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute static struct device_attribute dev_attr_wq_ats_disable = __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store); +static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + struct idxd_device *idxd = wq->idxd; + u32 occup, offset; + + if (!idxd->hw.wq_cap.occupancy) + return -EOPNOTSUPP; + + offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX); + occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK; + + return sysfs_emit(buf, "%u\n", occup); +} + +static struct device_attribute dev_attr_wq_occupancy = + __ATTR(occupancy, 0444, wq_occupancy_show, NULL); + static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_clients.attr, &dev_attr_wq_state.attr, @@ -1261,6 +1279,7 @@ static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_max_transfer_size.attr, &dev_attr_wq_max_batch_size.attr, &dev_attr_wq_ats_disable.attr, + &dev_attr_wq_occupancy.attr, NULL, }; |