From eb0c062161cf5f98556a906c48b0cfc019d9e89c Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Mon, 16 Sep 2024 15:33:20 +0200
Subject: [PATCH] gpu: host1x: Set up device DMA parameters
In order to store device DMA parameters, the DMA framework depends on
the device's dma_parms field to point at a valid memory location. Add
backing storage for this in struct host1x_memory_context and point to
it.
Reported-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240916133320.368620-1-thierry.reding@gmail.com
(cherry picked from commit b4ad4ef374d66cc8df3188bb1ddb65bce5fc9e50)
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/gpu/host1x/context.c | 1 +
include/linux/host1x.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/gpu/host1x/context.c b/drivers/gpu/host1x/context.c
index 955c971c528d4..a6f6779662a36 100644
--- a/drivers/gpu/host1x/context.c
+++ b/drivers/gpu/host1x/context.c
@@ -58,6 +58,7 @@ int host1x_memory_context_list_init(struct host1x *host1x)
ctx->dev.parent = host1x->dev;
ctx->dev.release = host1x_memory_context_release;
+ ctx->dev.dma_parms = &ctx->dma_parms;
dma_set_max_seg_size(&ctx->dev, UINT_MAX);
err = device_add(&ctx->dev);
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index 9c8119ed13a4b..c4dde3aafcacd 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -466,6 +466,7 @@ struct host1x_memory_context {
refcount_t ref;
struct pid *owner;
+ struct device_dma_parameters dma_parms;
struct device dev;
u64 dma_mask;
u32 stream_id;
--
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