diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-04-07 22:31:34 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-04-12 19:48:45 +0200 |
| commit | c2f156bf168fb42cd6ecd0a8e2204dbe542b8516 (patch) | |
| tree | 6235c17693d69f6f9fd45d35a451f20def17d059 /drivers/dma | |
| parent | dmaengine: idxd: add per DSA wq workqueue for processing cr faults (diff) | |
| download | linux-c2f156bf168fb42cd6ecd0a8e2204dbe542b8516.tar.xz linux-c2f156bf168fb42cd6ecd0a8e2204dbe542b8516.zip | |
dmaengine: idxd: create kmem cache for event log fault items
Add a kmem cache per device for allocating event log fault context. The
context allows an event log entry to be copied and passed to a software
workqueue to be processed. Due to each device can have different sized
event log entry depending on device type, it's not possible to have a
global kmem cache.
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/20230407203143.2189681-8-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/idxd/idxd.h | 10 | ||||
| -rw-r--r-- | drivers/dma/idxd/init.c | 9 | ||||
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 6e56361ae658..c5d99c179902 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -274,6 +274,15 @@ struct idxd_evl { u16 head; }; +struct idxd_evl_fault { + struct work_struct work; + struct idxd_wq *wq; + u8 status; + + /* make this last member always */ + struct __evl_entry entry[]; +}; + struct idxd_device { struct idxd_dev idxd_dev; struct idxd_driver_data *data; @@ -331,6 +340,7 @@ struct idxd_device { unsigned long *opcap_bmap; struct idxd_evl *evl; + struct kmem_cache *evl_cache; struct dentry *dbgfs_dir; struct dentry *dbgfs_evl_file; diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index e21c4b7a1d32..7828ac2d31aa 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -345,6 +345,15 @@ static int idxd_init_evl(struct idxd_device *idxd) spin_lock_init(&evl->lock); evl->size = IDXD_EVL_SIZE_MIN; + + idxd->evl_cache = kmem_cache_create(dev_name(idxd_confdev(idxd)), + sizeof(struct idxd_evl_fault) + evl_ent_size(idxd), + 0, 0, NULL); + if (!idxd->evl_cache) { + kfree(evl); + return -ENOMEM; + } + idxd->evl = evl; return 0; } diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 163fdfaa5022..8b9dfa0d2b99 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1718,6 +1718,7 @@ static void idxd_conf_device_release(struct device *dev) kfree(idxd->wqs); kfree(idxd->engines); kfree(idxd->evl); + kmem_cache_destroy(idxd->evl_cache); ida_free(&idxd_ida, idxd->id); bitmap_free(idxd->opcap_bmap); kfree(idxd); |