diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-04-07 23:31:29 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-04-12 20:48:44 +0300 |
| commit | 1649091f9180470f96f001724a4902d5d82bbd75 (patch) | |
| tree | 9f65451b2c4b4d28b7b25a111b10c74b9e81cf5d /drivers/dma/idxd/init.c | |
| parent | 0c40bfb4c2dfad00a15337bb6213f92a797e3695 (diff) | |
| download | linux-1649091f9180470f96f001724a4902d5d82bbd75.tar.xz | |
dmaengine: idxd: add event log size sysfs attribute
Add support for changing of the event log size. Event log is a
feature added to DSA 2.0 hardware to improve error reporting.
It supersedes the SWERROR register on DSA 1.0 hardware and hope
to prevent loss of reported errors.
The error log size determines how many error entries supported for
the device. It can be configured by the user via sysfs attribute.
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/20230407203143.2189681-3-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/init.c')
| -rw-r--r-- | drivers/dma/idxd/init.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index a78cfd361c04..525de59df82a 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -331,6 +331,23 @@ static void idxd_cleanup_internals(struct idxd_device *idxd) destroy_workqueue(idxd->wq); } +static int idxd_init_evl(struct idxd_device *idxd) +{ + struct device *dev = &idxd->pdev->dev; + struct idxd_evl *evl; + + if (idxd->hw.gen_cap.evl_support == 0) + return 0; + + evl = kzalloc_node(sizeof(*evl), GFP_KERNEL, dev_to_node(dev)); + if (!evl) + return -ENOMEM; + + evl->size = IDXD_EVL_SIZE_MIN; + idxd->evl = evl; + return 0; +} + static int idxd_setup_internals(struct idxd_device *idxd) { struct device *dev = &idxd->pdev->dev; @@ -356,8 +373,14 @@ static int idxd_setup_internals(struct idxd_device *idxd) goto err_wkq_create; } + rc = idxd_init_evl(idxd); + if (rc < 0) + goto err_evl; + return 0; + err_evl: + destroy_workqueue(idxd->wq); err_wkq_create: for (i = 0; i < idxd->max_groups; i++) put_device(group_confdev(idxd->groups[i])); |