mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
78 lines
2.3 KiB
Diff
78 lines
2.3 KiB
Diff
From 775277f1d6585ea048c73ca001ed2867a32396a4 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Wed, 22 Jul 2020 17:59:31 +0100
|
|
Subject: [PATCH] bcm2835-dma: Advertise the full DMA range
|
|
|
|
Unless the DMA mask is set wider than 32 bits, DMA mapping will use a
|
|
bounce buffer.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/dma/bcm2835-dma.c | 18 +++++++++++++++---
|
|
1 file changed, 15 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/dma/bcm2835-dma.c
|
|
+++ b/drivers/dma/bcm2835-dma.c
|
|
@@ -41,6 +41,7 @@
|
|
#define BCM2711_DMA_MEMCPY_CHAN 14
|
|
|
|
struct bcm2835_dma_cfg_data {
|
|
+ u64 dma_mask;
|
|
u32 chan_40bit_mask;
|
|
};
|
|
|
|
@@ -300,10 +301,12 @@ DEFINE_SPINLOCK(memcpy_lock);
|
|
|
|
static const struct bcm2835_dma_cfg_data bcm2835_dma_cfg = {
|
|
.chan_40bit_mask = 0,
|
|
+ .dma_mask = DMA_BIT_MASK(32),
|
|
};
|
|
|
|
static const struct bcm2835_dma_cfg_data bcm2711_dma_cfg = {
|
|
.chan_40bit_mask = BIT(11) | BIT(12) | BIT(13) | BIT(14),
|
|
+ .dma_mask = DMA_BIT_MASK(36),
|
|
};
|
|
|
|
static inline size_t bcm2835_dma_max_frame_length(struct bcm2835_chan *c)
|
|
@@ -1180,6 +1183,8 @@ static struct dma_chan *bcm2835_dma_xlat
|
|
|
|
static int bcm2835_dma_probe(struct platform_device *pdev)
|
|
{
|
|
+ const struct bcm2835_dma_cfg_data *cfg_data;
|
|
+ const struct of_device_id *of_id;
|
|
struct bcm2835_dmadev *od;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
@@ -1189,13 +1194,20 @@ static int bcm2835_dma_probe(struct plat
|
|
int irq_flags;
|
|
uint32_t chans_available;
|
|
char chan_name[BCM2835_DMA_CHAN_NAME_SIZE];
|
|
- const struct of_device_id *of_id;
|
|
int chan_count, chan_start, chan_end;
|
|
|
|
+ of_id = of_match_node(bcm2835_dma_of_match, pdev->dev.of_node);
|
|
+ if (!of_id) {
|
|
+ dev_err(&pdev->dev, "Failed to match compatible string\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ cfg_data = of_id->data;
|
|
+
|
|
if (!pdev->dev.dma_mask)
|
|
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
|
|
|
|
- rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
+ rc = dma_set_mask_and_coherent(&pdev->dev, cfg_data->dma_mask);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "Unable to set DMA mask\n");
|
|
return rc;
|
|
@@ -1260,7 +1272,7 @@ static int bcm2835_dma_probe(struct plat
|
|
return -EINVAL;
|
|
}
|
|
|
|
- od->cfg_data = of_id->data;
|
|
+ od->cfg_data = cfg_data;
|
|
|
|
/* Request DMA channel mask from device tree */
|
|
if (of_property_read_u32(pdev->dev.of_node,
|