[PATCH AUTOSEL 6.1 04/11] drm/lima: add mask irq callback to gp and pp

From: Sasha Levin
Date: Mon May 27 2024 - 12:06:27 EST


From: Erico Nunes <nunes.erico@xxxxxxxxx>

[ Upstream commit 49c13b4d2dd4a831225746e758893673f6ae961c ]

This is needed because we want to reset those devices in device-agnostic
code such as lima_sched.
In particular, masking irqs will be useful before a hard reset to
prevent race conditions.

Signed-off-by: Erico Nunes <nunes.erico@xxxxxxxxx>
Signed-off-by: Qiang Yu <yuq825@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405152951.1531555-2-nunes.erico@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/lima/lima_bcast.c | 12 ++++++++++++
drivers/gpu/drm/lima/lima_bcast.h | 3 +++
drivers/gpu/drm/lima/lima_gp.c | 8 ++++++++
drivers/gpu/drm/lima/lima_pp.c | 18 ++++++++++++++++++
drivers/gpu/drm/lima/lima_sched.h | 1 +
5 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/lima/lima_bcast.c b/drivers/gpu/drm/lima/lima_bcast.c
index fbc43f243c54d..6d000504e1a4e 100644
--- a/drivers/gpu/drm/lima/lima_bcast.c
+++ b/drivers/gpu/drm/lima/lima_bcast.c
@@ -43,6 +43,18 @@ void lima_bcast_suspend(struct lima_ip *ip)

}

+int lima_bcast_mask_irq(struct lima_ip *ip)
+{
+ bcast_write(LIMA_BCAST_BROADCAST_MASK, 0);
+ bcast_write(LIMA_BCAST_INTERRUPT_MASK, 0);
+ return 0;
+}
+
+int lima_bcast_reset(struct lima_ip *ip)
+{
+ return lima_bcast_hw_init(ip);
+}
+
int lima_bcast_init(struct lima_ip *ip)
{
int i;
diff --git a/drivers/gpu/drm/lima/lima_bcast.h b/drivers/gpu/drm/lima/lima_bcast.h
index 465ee587bceb2..cd08841e47879 100644
--- a/drivers/gpu/drm/lima/lima_bcast.h
+++ b/drivers/gpu/drm/lima/lima_bcast.h
@@ -13,4 +13,7 @@ void lima_bcast_fini(struct lima_ip *ip);

void lima_bcast_enable(struct lima_device *dev, int num_pp);

+int lima_bcast_mask_irq(struct lima_ip *ip);
+int lima_bcast_reset(struct lima_ip *ip);
+
#endif
diff --git a/drivers/gpu/drm/lima/lima_gp.c b/drivers/gpu/drm/lima/lima_gp.c
index 8dd501b7a3d0d..6cf46b653e810 100644
--- a/drivers/gpu/drm/lima/lima_gp.c
+++ b/drivers/gpu/drm/lima/lima_gp.c
@@ -212,6 +212,13 @@ static void lima_gp_task_mmu_error(struct lima_sched_pipe *pipe)
lima_sched_pipe_task_done(pipe);
}

+static void lima_gp_task_mask_irq(struct lima_sched_pipe *pipe)
+{
+ struct lima_ip *ip = pipe->processor[0];
+
+ gp_write(LIMA_GP_INT_MASK, 0);
+}
+
static int lima_gp_task_recover(struct lima_sched_pipe *pipe)
{
struct lima_ip *ip = pipe->processor[0];
@@ -344,6 +351,7 @@ int lima_gp_pipe_init(struct lima_device *dev)
pipe->task_error = lima_gp_task_error;
pipe->task_mmu_error = lima_gp_task_mmu_error;
pipe->task_recover = lima_gp_task_recover;
+ pipe->task_mask_irq = lima_gp_task_mask_irq;

return 0;
}
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c
index a5c95bed08c09..54b208a4a768e 100644
--- a/drivers/gpu/drm/lima/lima_pp.c
+++ b/drivers/gpu/drm/lima/lima_pp.c
@@ -408,6 +408,9 @@ static void lima_pp_task_error(struct lima_sched_pipe *pipe)

lima_pp_hard_reset(ip);
}
+
+ if (pipe->bcast_processor)
+ lima_bcast_reset(pipe->bcast_processor);
}

static void lima_pp_task_mmu_error(struct lima_sched_pipe *pipe)
@@ -416,6 +419,20 @@ static void lima_pp_task_mmu_error(struct lima_sched_pipe *pipe)
lima_sched_pipe_task_done(pipe);
}

+static void lima_pp_task_mask_irq(struct lima_sched_pipe *pipe)
+{
+ int i;
+
+ for (i = 0; i < pipe->num_processor; i++) {
+ struct lima_ip *ip = pipe->processor[i];
+
+ pp_write(LIMA_PP_INT_MASK, 0);
+ }
+
+ if (pipe->bcast_processor)
+ lima_bcast_mask_irq(pipe->bcast_processor);
+}
+
static struct kmem_cache *lima_pp_task_slab;
static int lima_pp_task_slab_refcnt;

@@ -447,6 +464,7 @@ int lima_pp_pipe_init(struct lima_device *dev)
pipe->task_fini = lima_pp_task_fini;
pipe->task_error = lima_pp_task_error;
pipe->task_mmu_error = lima_pp_task_mmu_error;
+ pipe->task_mask_irq = lima_pp_task_mask_irq;

return 0;
}
diff --git a/drivers/gpu/drm/lima/lima_sched.h b/drivers/gpu/drm/lima/lima_sched.h
index 6a11764d87b38..edf205be43699 100644
--- a/drivers/gpu/drm/lima/lima_sched.h
+++ b/drivers/gpu/drm/lima/lima_sched.h
@@ -80,6 +80,7 @@ struct lima_sched_pipe {
void (*task_error)(struct lima_sched_pipe *pipe);
void (*task_mmu_error)(struct lima_sched_pipe *pipe);
int (*task_recover)(struct lima_sched_pipe *pipe);
+ void (*task_mask_irq)(struct lima_sched_pipe *pipe);

struct work_struct recover_work;
};
--
2.43.0