diff options
| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2020-04-23 14:53:28 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-29 14:52:53 +0200 |
| commit | fb01562e5a8a731bb1807eba0a9fadb355ca2277 (patch) | |
| tree | 44ea2f6f48fcd596858564915070adb29154c30f /include/linux/uacce.h | |
| parent | da656a042568ffbc30881c43a832277f275eea4a (diff) | |
uacce: Remove mm_exit() op
The mm_exit() op will be removed from the SVA API. When a process dies
and its mm goes away, the IOMMU driver won't notify device drivers
anymore. Drivers should expect to handle a lot more aborted DMA. On the
upside, it does greatly simplify the queue management.
The uacce_mm struct, that tracks all queues bound to an mm, was only
used by the mm_exit() callback. Remove it.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20200423125329.782066-2-jean-philippe@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/uacce.h')
| -rw-r--r-- | include/linux/uacce.h | 34 |
1 files changed, 9 insertions, 25 deletions
diff --git a/include/linux/uacce.h b/include/linux/uacce.h index 0e215e6d0534..454c2f6672d7 100644 --- a/include/linux/uacce.h +++ b/include/linux/uacce.h @@ -68,19 +68,21 @@ enum uacce_q_state { * @uacce: pointer to uacce * @priv: private pointer * @wait: wait queue head - * @list: index into uacce_mm - * @uacce_mm: the corresponding mm + * @list: index into uacce queues list * @qfrs: pointer of qfr regions * @state: queue state machine + * @pasid: pasid associated to the mm + * @handle: iommu_sva handle returned by iommu_sva_bind_device() */ struct uacce_queue { struct uacce_device *uacce; void *priv; wait_queue_head_t wait; struct list_head list; - struct uacce_mm *uacce_mm; struct uacce_qfile_region *qfrs[UACCE_MAX_REGION]; enum uacce_q_state state; + int pasid; + struct iommu_sva *handle; }; /** @@ -96,8 +98,8 @@ struct uacce_queue { * @cdev: cdev of the uacce * @dev: dev of the uacce * @priv: private pointer of the uacce - * @mm_list: list head of uacce_mm->list - * @mm_lock: lock for mm_list + * @queues: list of queues + * @queues_lock: lock for queues list * @inode: core vfs */ struct uacce_device { @@ -112,27 +114,9 @@ struct uacce_device { struct cdev *cdev; struct device dev; void *priv; - struct list_head mm_list; - struct mutex mm_lock; - struct inode *inode; -}; - -/** - * struct uacce_mm - keep track of queues bound to a process - * @list: index into uacce_device - * @queues: list of queues - * @mm: the mm struct - * @lock: protects the list of queues - * @pasid: pasid of the uacce_mm - * @handle: iommu_sva handle return from iommu_sva_bind_device - */ -struct uacce_mm { - struct list_head list; struct list_head queues; - struct mm_struct *mm; - struct mutex lock; - int pasid; - struct iommu_sva *handle; + struct mutex queues_lock; + struct inode *inode; }; #if IS_ENABLED(CONFIG_UACCE) |