Commit c2f156bf authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

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: default avatarTony Zhu <tony.zhu@intel.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Co-developed-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230407203143.2189681-8-fenghua.yu@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 2f30decd

drivers/dma/idxd/idxd.h

+10 −0
Original line number Diff line number Diff line
@@ -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;

drivers/dma/idxd/init.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/dma/idxd/sysfs.c

+1 −0
Original line number Diff line number Diff line
@@ -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);