From: Brendan King <brendan.king@xxxxxxxxxx>
This is in preparation for the next commit, which makes use of the list.
Signed-off-by: Brendan King <brendan.king@xxxxxxxxxx>
Signed-off-by: Matt Coster <matt.coster@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/gpu/drm/imagination/pvr_context.c | 14 ++++++++++++++
drivers/gpu/drm/imagination/pvr_context.h | 3 +++
drivers/gpu/drm/imagination/pvr_device.h | 10 ++++++++++
drivers/gpu/drm/imagination/pvr_drv.c | 3 +++
4 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/imagination/pvr_context.c b/drivers/gpu/drm/imagination/pvr_context.c
index eded5e955cc0..255c93582734 100644
--- a/drivers/gpu/drm/imagination/pvr_context.c
+++ b/drivers/gpu/drm/imagination/pvr_context.c
@@ -17,10 +17,14 @@
#include <drm/drm_auth.h>
#include <drm/drm_managed.h>
+
+#include <linux/bug.h>
#include <linux/errno.h>
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/xarray.h>
@@ -354,6 +358,10 @@ int pvr_context_create(struct pvr_file *pvr_file, struct drm_pvr_ioctl_create_co
return err;
}
+ spin_lock(&pvr_dev->ctx_list_lock);
+ list_add_tail(&ctx->file_link, &pvr_file->contexts);
+ spin_unlock(&pvr_dev->ctx_list_lock);
+
return 0;
err_destroy_fw_obj:
@@ -380,6 +388,11 @@ pvr_context_release(struct kref *ref_count)
container_of(ref_count, struct pvr_context, ref_count);
struct pvr_device *pvr_dev = ctx->pvr_dev;
+ WARN_ON(in_interrupt());
+ spin_lock(&pvr_dev->ctx_list_lock);
+ list_del(&ctx->file_link);
+ spin_unlock(&pvr_dev->ctx_list_lock);
+
xa_erase(&pvr_dev->ctx_ids, ctx->ctx_id);
pvr_context_destroy_queues(ctx);
pvr_fw_object_destroy(ctx->fw_obj);
@@ -451,6 +464,7 @@ void pvr_destroy_contexts_for_file(struct pvr_file *pvr_file)
void pvr_context_device_init(struct pvr_device *pvr_dev)
{
xa_init_flags(&pvr_dev->ctx_ids, XA_FLAGS_ALLOC1);
+ spin_lock_init(&pvr_dev->ctx_list_lock);
}
/**
diff --git a/drivers/gpu/drm/imagination/pvr_context.h b/drivers/gpu/drm/imagination/pvr_context.h
index 0c7b97dfa6ba..a5b0a82a54a1 100644
--- a/drivers/gpu/drm/imagination/pvr_context.h
+++ b/drivers/gpu/drm/imagination/pvr_context.h
@@ -85,6 +85,9 @@ struct pvr_context {
/** @compute: Transfer queue. */
struct pvr_queue *transfer;
} queues;
+
+ /** @file_link: pvr_file PVR context list link. */
+ struct list_head file_link;
};
static __always_inline struct pvr_queue *
diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h
index ecdd5767d8ef..b1fbf9ccf19f 100644
--- a/drivers/gpu/drm/imagination/pvr_device.h
+++ b/drivers/gpu/drm/imagination/pvr_device.h
@@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/math.h>
#include <linux/mutex.h>
+#include <linux/spinlock_types.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/wait.h>
@@ -293,6 +294,12 @@ struct pvr_device {
/** @sched_wq: Workqueue for schedulers. */
struct workqueue_struct *sched_wq;
+
+ /**
+ * @ctx_list_lock: Lock to be held when accessing the context list in
+ * struct pvr_file.
+ */
+ spinlock_t ctx_list_lock;
};
/**
@@ -344,6 +351,9 @@ struct pvr_file {
* This array is used to allocate handles returned to userspace.
*/
struct xarray vm_ctx_handles;
+
+ /** @contexts: PVR context list. */
+ struct list_head contexts;
};
/**
diff --git a/drivers/gpu/drm/imagination/pvr_drv.c b/drivers/gpu/drm/imagination/pvr_drv.c
index 1a0cb7aa9cea..fb17196e05f4 100644
--- a/drivers/gpu/drm/imagination/pvr_drv.c
+++ b/drivers/gpu/drm/imagination/pvr_drv.c
@@ -28,6 +28,7 @@
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -1326,6 +1327,8 @@ pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
*/
pvr_file->pvr_dev = pvr_dev;
+ INIT_LIST_HEAD(&pvr_file->contexts);
+
xa_init_flags(&pvr_file->ctx_handles, XA_FLAGS_ALLOC1);
xa_init_flags(&pvr_file->free_list_handles, XA_FLAGS_ALLOC1);
xa_init_flags(&pvr_file->hwrt_handles, XA_FLAGS_ALLOC1);
--
2.46.0
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