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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>
This commit is contained in:
Dave Jiang 2023-04-07 13:31:34 -07:00 committed by Vinod Koul
parent 2f30decd2f
commit c2f156bf16
3 changed files with 20 additions and 0 deletions
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10
drivers/dma/idxd/idxd.h
View File

@ -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;

9
drivers/dma/idxd/init.c
View File

@ -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;
}

1
drivers/dma/idxd/sysfs.c
View File

@ -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);