From d83d189f6a41cb4f278fa57c85ffeef851f92d24 Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Fri, 14 Feb 2020 19:50:26 -0800
Subject: drm/lima: fix recovering from PLBU out of memory
Git-commit: 6707b755060563cb6b10d3c390fae10a600eb19d
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
It looks like on PLBU_OUT_OF_MEM interrupt we need to resume from where we
stopped, i.e. new PLBU heap start is old end. Also update end address
in GP frame to grow heap on 2nd and subsequent out of memory interrupts.
Fixes: 2081e8dcf1ee ("drm/lima: recover task by enlarging heap buffer")
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200215035026.3180698-1-anarsoul@gmail.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/lima/lima_gp.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/lima/lima_gp.c b/drivers/gpu/drm/lima/lima_gp.c
index 52b210f9a605..d8841c870d90 100644
--- a/drivers/gpu/drm/lima/lima_gp.c
+++ b/drivers/gpu/drm/lima/lima_gp.c
@@ -231,8 +231,13 @@ static int lima_gp_task_recover(struct lima_sched_pipe *pipe)
}
gp_write(LIMA_GP_INT_MASK, LIMA_GP_IRQ_MASK_USED);
+ /* Resume from where we stopped, i.e. new start is old end */
+ gp_write(LIMA_GP_PLBU_ALLOC_START_ADDR,
+ f[LIMA_GP_PLBU_ALLOC_END_ADDR >> 2]);
+ f[LIMA_GP_PLBU_ALLOC_END_ADDR >> 2] =
+ f[LIMA_GP_PLBU_ALLOC_START_ADDR >> 2] + task->heap->heap_size;
gp_write(LIMA_GP_PLBU_ALLOC_END_ADDR,
- f[LIMA_GP_PLBU_ALLOC_START_ADDR >> 2] + task->heap->heap_size);
+ f[LIMA_GP_PLBU_ALLOC_END_ADDR >> 2]);
gp_write(LIMA_GP_CMD, LIMA_GP_CMD_UPDATE_PLBU_ALLOC);
return 0;
}
--
2.28.0