From: Leonardo Bras <leobras.c@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Joel Stanley <joel@jms.id.au>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Leonardo Bras <leobras.c@gmail.com>,
Thiago Jung Bauermann <bauerman@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
Brian King <brking@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 3/7] powerpc/pseries/iommu: Move window-removing part of remove_ddw into remove_dma_window
Date: Thu, 16 Jul 2020 04:16:55 -0300 [thread overview]
Message-ID: <20200716071658.467820-4-leobras.c@gmail.com> (raw)
In-Reply-To: <20200716071658.467820-1-leobras.c@gmail.com>
Move the window-removing part of remove_ddw into a new function
(remove_dma_window), so it can be used to remove other DMA windows.
It's useful for removing DMA windows that don't create DIRECT64_PROPNAME
property, like the default DMA window from the device, which uses
"ibm,dma-window".
Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
---
arch/powerpc/platforms/pseries/iommu.c | 45 +++++++++++++++-----------
1 file changed, 27 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 1a933c4e8bba..4e33147825cc 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -781,25 +781,14 @@ static int __init disable_ddw_setup(char *str)
early_param("disable_ddw", disable_ddw_setup);
-static void remove_ddw(struct device_node *np, bool remove_prop)
+static void remove_dma_window(struct device_node *np, u32 *ddw_avail,
+ struct property *win)
{
struct dynamic_dma_window_prop *dwp;
- struct property *win64;
- u32 ddw_avail[DDW_APPLICABLE_SIZE];
u64 liobn;
- int ret = 0;
-
- ret = of_property_read_u32_array(np, "ibm,ddw-applicable",
- &ddw_avail[0], DDW_APPLICABLE_SIZE);
-
- win64 = of_find_property(np, DIRECT64_PROPNAME, NULL);
- if (!win64)
- return;
-
- if (ret || win64->length < sizeof(*dwp))
- goto delprop;
+ int ret;
- dwp = win64->value;
+ dwp = win->value;
liobn = (u64)be32_to_cpu(dwp->liobn);
/* clear the whole window, note the arg is in kernel pages */
@@ -821,10 +810,30 @@ static void remove_ddw(struct device_node *np, bool remove_prop)
pr_debug("%pOF: successfully removed direct window: rtas returned "
"%d to ibm,remove-pe-dma-window(%x) %llx\n",
np, ret, ddw_avail[DDW_REMOVE_PE_DMA_WIN], liobn);
+}
+
+static void remove_ddw(struct device_node *np, bool remove_prop)
+{
+ struct property *win;
+ u32 ddw_avail[DDW_APPLICABLE_SIZE];
+ int ret = 0;
+
+ ret = of_property_read_u32_array(np, "ibm,ddw-applicable",
+ &ddw_avail[0], DDW_APPLICABLE_SIZE);
+ if (ret)
+ return;
+
+ win = of_find_property(np, DIRECT64_PROPNAME, NULL);
+ if (!win)
+ return;
+
+ if (win->length >= sizeof(struct dynamic_dma_window_prop))
+ remove_dma_window(np, ddw_avail, win);
+
+ if (!remove_prop)
+ return;
-delprop:
- if (remove_prop)
- ret = of_remove_property(np, win64);
+ ret = of_remove_property(np, win);
if (ret)
pr_warn("%pOF: failed to remove direct window property: %d\n",
np, ret);
--
2.25.4
next prev parent reply other threads:[~2020-07-16 7:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 7:16 [PATCH v4 0/7] Remove default DMA window before creating DDW Leonardo Bras
2020-07-16 7:16 ` [PATCH v4 1/7] powerpc/pseries/iommu: Create defines for operations in ibm,ddw-applicable Leonardo Bras
2020-08-04 21:27 ` [PATCH v4 1/7] powerpc/pseries/iommu: Create defines for operations in ibm, ddw-applicable David Dai
2020-08-04 21:34 ` David Dai
2020-07-16 7:16 ` [PATCH v4 2/7] powerpc/pseries/iommu: Update call to ibm,query-pe-dma-windows Leonardo Bras
2020-08-04 21:31 ` [PATCH v4 2/7] powerpc/pseries/iommu: Update call to ibm, query-pe-dma-windows David Dai
2020-07-16 7:16 ` Leonardo Bras [this message]
2020-08-04 21:32 ` [PATCH v4 3/7] powerpc/pseries/iommu: Move window-removing part of remove_ddw into remove_dma_window David Dai
2020-07-16 7:16 ` [PATCH v4 4/7] powerpc/pseries/iommu: Remove default DMA window before creating DDW Leonardo Bras
2020-08-04 21:33 ` David Dai
2020-07-16 7:16 ` [PATCH v4 5/7] powerpc/iommu: Move iommu_table cleaning routine to iommu_table_clean Leonardo Bras
2020-07-21 4:59 ` Alexey Kardashevskiy
2020-07-21 22:13 ` Leonardo Bras
2020-07-22 0:52 ` Brian King
2020-07-22 23:45 ` Leonardo Bras
2020-07-22 1:28 ` Alexey Kardashevskiy
2020-07-22 23:37 ` Leonardo Bras
2020-07-16 7:16 ` [PATCH v4 6/7] powerpc/pseries/iommu: Make use of DDW even if it does not map the partition Leonardo Bras
2020-07-21 21:39 ` Leonardo Bras
2020-07-16 7:16 ` [PATCH v4 7/7] powerpc/pseries/iommu: Rename "direct window" to "dma window" Leonardo Bras
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=20200716071658.467820-4-leobras.c@gmail.com \
--to=leobras.c@gmail.com \
--cc=aik@ozlabs.ru \
--cc=bauerman@linux.ibm.com \
--cc=benh@kernel.crashing.org \
--cc=brking@linux.vnet.ibm.com \
--cc=christophe.leroy@c-s.fr \
--cc=joel@jms.id.au \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=linuxram@us.ibm.com \
--cc=mpe@ellerman.id.au \
--cc=paulus@samba.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;
as well as URLs for NNTP newsgroup(s).