diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_bb.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_bb.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_bb.c b/drivers/gpu/drm/xe/xe_bb.c index 5ce0e26822f2..6d20229c11de 100644 --- a/drivers/gpu/drm/xe/xe_bb.c +++ b/drivers/gpu/drm/xe/xe_bb.c @@ -60,6 +60,41 @@ err: return ERR_PTR(err); } +struct xe_bb *xe_bb_ccs_new(struct xe_gt *gt, u32 dwords, + enum xe_sriov_vf_ccs_rw_ctxs ctx_id) +{ + struct xe_bb *bb = kmalloc(sizeof(*bb), GFP_KERNEL); + struct xe_device *xe = gt_to_xe(gt); + struct xe_sa_manager *bb_pool; + int err; + + if (!bb) + return ERR_PTR(-ENOMEM); + /* + * We need to allocate space for the requested number of dwords & + * one additional MI_BATCH_BUFFER_END dword. Since the whole SA + * is submitted to HW, we need to make sure that the last instruction + * is not over written when the last chunk of SA is allocated for BB. + * So, this extra DW acts as a guard here. + */ + + bb_pool = xe->sriov.vf.ccs.contexts[ctx_id].mem.ccs_bb_pool; + bb->bo = xe_sa_bo_new(bb_pool, 4 * (dwords + 1)); + + if (IS_ERR(bb->bo)) { + err = PTR_ERR(bb->bo); + goto err; + } + + bb->cs = xe_sa_bo_cpu_addr(bb->bo); + bb->len = 0; + + return bb; +err: + kfree(bb); + return ERR_PTR(err); +} + static struct xe_sched_job * __xe_bb_create_job(struct xe_exec_queue *q, struct xe_bb *bb, u64 *addr) { |