mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
793f8ab62c
Add kernel patches for version 6.1. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
78 lines
2.9 KiB
Diff
78 lines
2.9 KiB
Diff
From 132f5d41c2da9f7292f1495fd30cf04a3de8d196 Mon Sep 17 00:00:00 2001
|
|
From: Dom Cobley <popcornmix@gmail.com>
|
|
Date: Fri, 5 May 2023 11:23:50 +0100
|
|
Subject: [PATCH] bcm2835-dma: Need to keep PROT bits set in CS on
|
|
40bit controller
|
|
|
|
Resetting them to zero puts DMA channel into secure mode
|
|
which makes further accesses impossible
|
|
|
|
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
|
|
---
|
|
drivers/dma/bcm2835-dma.c | 20 ++++++++++++++------
|
|
1 file changed, 14 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/dma/bcm2835-dma.c
|
|
+++ b/drivers/dma/bcm2835-dma.c
|
|
@@ -249,6 +249,9 @@ struct bcm2835_desc {
|
|
#define BCM2711_DMA40_DISDEBUG BIT(29)
|
|
#define BCM2711_DMA40_ABORT BIT(30)
|
|
#define BCM2711_DMA40_HALT BIT(31)
|
|
+// we always want to run in supervisor mode
|
|
+#define BCM2711_DMA40_PROT (BIT(8)|BIT(9))
|
|
+
|
|
#define BCM2711_DMA40_CS_FLAGS(x) (x & (BCM2711_DMA40_QOS(15) | \
|
|
BCM2711_DMA40_PANIC_QOS(15) | \
|
|
BCM2711_DMA40_WAIT_FOR_WRITES | \
|
|
@@ -682,7 +685,7 @@ static void bcm2835_dma_abort(struct bcm
|
|
dev_err(c->vc.chan.device->dev,
|
|
"failed to halt dma\n");
|
|
|
|
- writel(0, chan_base + BCM2711_DMA40_CS);
|
|
+ writel(BCM2711_DMA40_PROT, chan_base + BCM2711_DMA40_CS);
|
|
writel(0, chan_base + BCM2711_DMA40_CB);
|
|
} else {
|
|
/*
|
|
@@ -742,7 +745,7 @@ static void bcm2835_dma_start_desc(struc
|
|
if (c->is_40bit_channel) {
|
|
writel(to_bcm2711_cbaddr(d->cb_list[0].paddr),
|
|
c->chan_base + BCM2711_DMA40_CB);
|
|
- writel(BCM2711_DMA40_ACTIVE | BCM2711_DMA40_CS_FLAGS(c->dreq),
|
|
+ writel(BCM2711_DMA40_ACTIVE | BCM2711_DMA40_PROT | BCM2711_DMA40_CS_FLAGS(c->dreq),
|
|
c->chan_base + BCM2711_DMA40_CS);
|
|
} else {
|
|
writel(d->cb_list[0].paddr, c->chan_base + BCM2835_DMA_ADDR);
|
|
@@ -775,8 +778,13 @@ static irqreturn_t bcm2835_dma_callback(
|
|
* if this IRQ handler is threaded.) If the channel is finished, it
|
|
* will remain idle despite the ACTIVE flag being set.
|
|
*/
|
|
- writel(BCM2835_DMA_INT | BCM2835_DMA_ACTIVE | BCM2835_DMA_CS_FLAGS(c->dreq),
|
|
- c->chan_base + BCM2835_DMA_CS);
|
|
+ if (c->is_40bit_channel)
|
|
+ writel(BCM2835_DMA_INT | BCM2711_DMA40_ACTIVE | BCM2711_DMA40_PROT |
|
|
+ BCM2711_DMA40_CS_FLAGS(c->dreq),
|
|
+ c->chan_base + BCM2711_DMA40_CS);
|
|
+ else
|
|
+ writel(BCM2835_DMA_INT | BCM2835_DMA_ACTIVE | BCM2835_DMA_CS_FLAGS(c->dreq),
|
|
+ c->chan_base + BCM2835_DMA_CS);
|
|
|
|
d = c->desc;
|
|
|
|
@@ -1230,14 +1238,14 @@ void bcm2711_dma40_memcpy(dma_addr_t dst
|
|
scb->next_cb = 0;
|
|
|
|
writel(to_bcm2711_cbaddr(memcpy_scb_dma), memcpy_chan + BCM2711_DMA40_CB);
|
|
- writel(BCM2711_DMA40_MEMCPY_FLAGS + BCM2711_DMA40_ACTIVE,
|
|
+ writel(BCM2711_DMA40_MEMCPY_FLAGS | BCM2711_DMA40_ACTIVE | BCM2711_DMA40_PROT,
|
|
memcpy_chan + BCM2711_DMA40_CS);
|
|
|
|
/* Poll for completion */
|
|
while (!(readl(memcpy_chan + BCM2711_DMA40_CS) & BCM2711_DMA40_END))
|
|
cpu_relax();
|
|
|
|
- writel(BCM2711_DMA40_END, memcpy_chan + BCM2711_DMA40_CS);
|
|
+ writel(BCM2711_DMA40_END | BCM2711_DMA40_PROT, memcpy_chan + BCM2711_DMA40_CS);
|
|
|
|
spin_unlock_irqrestore(&memcpy_lock, flags);
|
|
}
|