diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-04-07 23:31:43 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-04-12 20:48:46 +0300 |
| commit | f2dc327131b5cbb2cbb467cec23836f2e9d4cf46 (patch) | |
| tree | 3061546a26b79310c4e4d2654d22763cfb6e1add /drivers/dma/idxd/sysfs.c | |
| parent | a62b8f87c770fa4109ce515e4d8a0d4701a4ca5f (diff) | |
| download | linux-f2dc327131b5cbb2cbb467cec23836f2e9d4cf46.tar.xz | |
dmaengine: idxd: add per wq PRS disable
Add sysfs knob for per wq Page Request Service disable. This knob
disables PRS support for the specific wq. When this bit is set,
it also overrides the wq's block on fault enabling.
Tested-by: Tony Zhu <tony.zhu@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230407203143.2189681-17-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 465d2e7627e4..293739ac5596 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -822,10 +822,14 @@ static ssize_t wq_block_on_fault_store(struct device *dev, if (rc < 0) return rc; - if (bof) + if (bof) { + if (test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags)) + return -EOPNOTSUPP; + set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); - else + } else { clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); + } return count; } @@ -1109,6 +1113,44 @@ 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_prs_disable_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + + return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags)); +} + +static ssize_t wq_prs_disable_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + struct idxd_device *idxd = wq->idxd; + bool prs_dis; + int rc; + + if (wq->state != IDXD_WQ_DISABLED) + return -EPERM; + + if (!idxd->hw.wq_cap.wq_prs_support) + return -EOPNOTSUPP; + + rc = kstrtobool(buf, &prs_dis); + if (rc < 0) + return rc; + + if (prs_dis) { + set_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); + /* when PRS is disabled, BOF needs to be off as well */ + clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); + } else { + clear_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); + } + return count; +} + +static struct device_attribute dev_attr_wq_prs_disable = + __ATTR(prs_disable, 0644, wq_prs_disable_show, wq_prs_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); @@ -1239,6 +1281,7 @@ 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_prs_disable.attr, &dev_attr_wq_occupancy.attr, &dev_attr_wq_enqcmds_retries.attr, &dev_attr_wq_op_config.attr, @@ -1260,6 +1303,13 @@ static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr, idxd->data->type == IDXD_TYPE_IAX; } +static bool idxd_wq_attr_wq_prs_disable_invisible(struct attribute *attr, + struct idxd_device *idxd) +{ + return attr == &dev_attr_wq_prs_disable.attr && + !idxd->hw.wq_cap.wq_prs_support; +} + static umode_t idxd_wq_attr_visible(struct kobject *kobj, struct attribute *attr, int n) { @@ -1273,6 +1323,9 @@ static umode_t idxd_wq_attr_visible(struct kobject *kobj, if (idxd_wq_attr_max_batch_size_invisible(attr, idxd)) return 0; + if (idxd_wq_attr_wq_prs_disable_invisible(attr, idxd)) + return 0; + return attr->mode; } |