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Message-Id: <20161031210203.2089-1-mzoran@crowfest.net>
Date: Mon, 31 Oct 2016 14:02:03 -0700
From: Michael Zoran <mzoran@...wfest.net>
To: gregkh@...uxfoundation.org
Cc: eric@...olt.net, swarren@...dotorg.org, lee@...nel.org,
mzoran@...wfest.net, daniels@...labora.com, noralf@...nnes.org,
popcornmix@...il.com, linux-rpi-kernel@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: vc04_services: setup DMA and coherent mask
VCHI messages between the CPU and firmware use 32-bit
bus addresses. Explicitly set the DMA mask and coherent
on all platforms.
Signed-off-by: Michael Zoran <mzoran@...wfest.net>
---
.../staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index a5afcc5..ba77fd8 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -97,6 +97,15 @@ int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state)
int slot_mem_size, frag_mem_size;
int err, irq, i;
+ /*
+ * VCHI messages between the CPU and firmware use
+ * 32-bit bus addresses.
+ */
+ err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+
+ if (err < 0)
+ return err;
+
(void)of_property_read_u32(dev->of_node, "cache-line-size",
&g_cache_line_size);
g_fragments_size = 2 * g_cache_line_size;
--
2.10.1
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