From: "Steven J. Hill" <steven.hill@cavium.com>
To: linux-mips@linux-mips.org
Cc: ralf@linux-mips.org
Subject: [PATCH] MIPS: Octeon: Put restrictions on DMA descriptors.
Date: Tue, 26 Jul 2016 10:26:23 -0500 [thread overview]
Message-ID: <5797811F.1000709@cavium.com> (raw)
Set the DMA mask such that all descriptors stay in the
lower 4GB of memory.
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
---
arch/mips/cavium-octeon/octeon-platform.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 7aeafed..c9359fd 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -311,7 +311,11 @@ static struct usb_ehci_pdata octeon_ehci_pdata = {
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
- .dma_mask_64 = 1,
+ /*
+ * We can DMA from anywhere. But the descriptors must be in
+ * the lower 4GB.
+ */
+ .dma_mask_64 = 0,
.power_on = octeon_ehci_power_on,
.power_off = octeon_ehci_power_off,
};
--
1.9.1
reply other threads:[~2016-07-26 15:26 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5797811F.1000709@cavium.com \
--to=steven.hill@cavium.com \
--cc=linux-mips@linux-mips.org \
--cc=ralf@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox