[PATCH 18/26] drm/xe/eudebug: Implement vm_bind_op discovery

[Mika Kuoppala]

Follow the vm bind, vm_bind op sequence for
discovery process of a vm with the vmas it has.
Send events for ops and attach metadata if available.

v2: - Fix bad op ref seqno (Christoph)
    - with discovery semaphore, we dont need vm lock (Matthew)

Cc: Matthew Brost <matthew.br...@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
 drivers/gpu/drm/xe/xe_eudebug.c | 45 +++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_eudebug.c b/drivers/gpu/drm/xe/xe_eudebug.c
index 2514b880d871..e17b8f98c7b6 100644
--- a/drivers/gpu/drm/xe/xe_eudebug.c
+++ b/drivers/gpu/drm/xe/xe_eudebug.c
@@ -3243,6 +3243,47 @@ void xe_eudebug_debug_metadata_destroy(struct xe_file 
*xef, struct xe_debug_meta
        xe_eudebug_event_put(d, debug_metadata_destroy_event(d, xef, m));
 }
 
+static int vm_discover_binds(struct xe_eudebug *d, struct xe_vm *vm)
+{
+       struct drm_gpuva *va;
+       unsigned int num_ops = 0, send_ops = 0;
+       u64 ref_seqno = 0;
+       int err;
+
+       /*
+        * Currently only vm_bind_ioctl inserts vma's
+        * and with discovery lock, we have exclusivity.
+        */
+       lockdep_assert_held_write(&d->xe->eudebug.discovery_lock);
+
+       drm_gpuvm_for_each_va(va, &vm->gpuvm)
+               num_ops++;
+
+       if (!num_ops)
+               return 0;
+
+       err = vm_bind_event(d, vm, num_ops, &ref_seqno);
+       if (err)
+               return err;
+
+       drm_gpuvm_for_each_va(va, &vm->gpuvm) {
+               struct xe_vma *vma = container_of(va, struct xe_vma, gpuva);
+
+               if (send_ops >= num_ops)
+                       break;
+
+               err = vm_bind_op(d, vm, DRM_XE_EUDEBUG_EVENT_CREATE, ref_seqno,
+                                xe_vma_start(vma), xe_vma_size(vma),
+                                &vma->eudebug.metadata.list);
+               if (err)
+                       return err;
+
+               send_ops++;
+       }
+
+       return num_ops == send_ops ? 0 : -EINVAL;
+}
+
 static int discover_client(struct xe_eudebug *d, struct xe_file *xef)
 {
        struct xe_debug_metadata *m;
@@ -3265,6 +3306,10 @@ static int discover_client(struct xe_eudebug *d, struct 
xe_file *xef)
                err = vm_create_event(d, xef, vm);
                if (err)
                        break;
+
+               err = vm_discover_binds(d, vm);
+               if (err)
+                       break;
        }
 
        xa_for_each(&xef->exec_queue.xa, i, q) {
-- 
2.43.0