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Message-Id: <65d11ee308138c3b294a73eaade99490d43e9329.1588344146.git.mchehab+huawei@kernel.org>
Date: Fri, 1 May 2020 16:44:57 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Ishizaki Kou <kou.ishizaki@...hiba.co.jp>,
netdev@...r.kernel.org
Subject: [PATCH 35/37] docs: networking: device drivers: convert toshiba/spider_net.txt to ReST
- add SPDX header;
- adjust title markup;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines where needed;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
.../networking/device_drivers/index.rst | 1 +
.../{spider_net.txt => spider_net.rst} | 58 +++++++++----------
MAINTAINERS | 2 +-
3 files changed, 30 insertions(+), 31 deletions(-)
rename Documentation/networking/device_drivers/toshiba/{spider_net.txt => spider_net.rst} (88%)
diff --git a/Documentation/networking/device_drivers/index.rst b/Documentation/networking/device_drivers/index.rst
index adc0bf65fb02..e18dad11bc72 100644
--- a/Documentation/networking/device_drivers/index.rst
+++ b/Documentation/networking/device_drivers/index.rst
@@ -50,6 +50,7 @@ Contents:
ti/cpsw_switchdev
ti/cpsw
ti/tlan
+ toshiba/spider_net
.. only:: subproject and html
diff --git a/Documentation/networking/device_drivers/toshiba/spider_net.txt b/Documentation/networking/device_drivers/toshiba/spider_net.rst
similarity index 88%
rename from Documentation/networking/device_drivers/toshiba/spider_net.txt
rename to Documentation/networking/device_drivers/toshiba/spider_net.rst
index b0b75f8463b3..fe5b32be15cd 100644
--- a/Documentation/networking/device_drivers/toshiba/spider_net.txt
+++ b/Documentation/networking/device_drivers/toshiba/spider_net.rst
@@ -1,6 +1,8 @@
+.. SPDX-License-Identifier: GPL-2.0
- The Spidernet Device Driver
- ===========================
+===========================
+The Spidernet Device Driver
+===========================
Written by Linas Vepstas <linas@...tin.ibm.com>
@@ -78,15 +80,15 @@ GDACTDPA, tail and head pointers. It will also summarize the contents
of the ring, starting at the tail pointer, and listing the status
of the descrs that follow.
-A typical example of the output, for a nearly idle system, might be
+A typical example of the output, for a nearly idle system, might be::
-net eth1: Total number of descrs=256
-net eth1: Chain tail located at descr=20
-net eth1: Chain head is at 20
-net eth1: HW curr desc (GDACTDPA) is at 21
-net eth1: Have 1 descrs with stat=x40800101
-net eth1: HW next desc (GDACNEXTDA) is at 22
-net eth1: Last 255 descrs with stat=xa0800000
+ net eth1: Total number of descrs=256
+ net eth1: Chain tail located at descr=20
+ net eth1: Chain head is at 20
+ net eth1: HW curr desc (GDACTDPA) is at 21
+ net eth1: Have 1 descrs with stat=x40800101
+ net eth1: HW next desc (GDACNEXTDA) is at 22
+ net eth1: Last 255 descrs with stat=xa0800000
In the above, the hardware has filled in one descr, number 20. Both
head and tail are pointing at 20, because it has not yet been emptied.
@@ -101,11 +103,11 @@ The status x4... corresponds to "full" and status xa... corresponds
to "empty". The actual value printed is RXCOMST_A.
In the device driver source code, a different set of names are
-used for these same concepts, so that
+used for these same concepts, so that::
-"empty" == SPIDER_NET_DESCR_CARDOWNED == 0xa
-"full" == SPIDER_NET_DESCR_FRAME_END == 0x4
-"not in use" == SPIDER_NET_DESCR_NOT_IN_USE == 0xf
+ "empty" == SPIDER_NET_DESCR_CARDOWNED == 0xa
+ "full" == SPIDER_NET_DESCR_FRAME_END == 0x4
+ "not in use" == SPIDER_NET_DESCR_NOT_IN_USE == 0xf
The RX RAM full bug/feature
@@ -137,19 +139,19 @@ while the hardware is waiting for a different set of descrs to become
empty.
A call to show_rx_chain() at this point indicates the nature of the
-problem. A typical print when the network is hung shows the following:
+problem. A typical print when the network is hung shows the following::
-net eth1: Spider RX RAM full, incoming packets might be discarded!
-net eth1: Total number of descrs=256
-net eth1: Chain tail located at descr=255
-net eth1: Chain head is at 255
-net eth1: HW curr desc (GDACTDPA) is at 0
-net eth1: Have 1 descrs with stat=xa0800000
-net eth1: HW next desc (GDACNEXTDA) is at 1
-net eth1: Have 127 descrs with stat=x40800101
-net eth1: Have 1 descrs with stat=x40800001
-net eth1: Have 126 descrs with stat=x40800101
-net eth1: Last 1 descrs with stat=xa0800000
+ net eth1: Spider RX RAM full, incoming packets might be discarded!
+ net eth1: Total number of descrs=256
+ net eth1: Chain tail located at descr=255
+ net eth1: Chain head is at 255
+ net eth1: HW curr desc (GDACTDPA) is at 0
+ net eth1: Have 1 descrs with stat=xa0800000
+ net eth1: HW next desc (GDACNEXTDA) is at 1
+ net eth1: Have 127 descrs with stat=x40800101
+ net eth1: Have 1 descrs with stat=x40800001
+ net eth1: Have 126 descrs with stat=x40800101
+ net eth1: Last 1 descrs with stat=xa0800000
Both the tail and head pointers are pointing at descr 255, which is
marked xa... which is "empty". Thus, from the OS point of view, there
@@ -198,7 +200,3 @@ For large packets, this mechanism generates a relatively small number
of interrupts, about 1K/sec. For smaller packets, this will drop to zero
interrupts, as the hardware can empty the queue faster than the kernel
can fill it.
-
-
- ======= END OF DOCUMENT ========
-
diff --git a/MAINTAINERS b/MAINTAINERS
index b0b352389d14..a580fc74ae95 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15919,7 +15919,7 @@ SPIDERNET NETWORK DRIVER for CELL
M: Ishizaki Kou <kou.ishizaki@...hiba.co.jp>
L: netdev@...r.kernel.org
S: Supported
-F: Documentation/networking/device_drivers/toshiba/spider_net.txt
+F: Documentation/networking/device_drivers/toshiba/spider_net.rst
F: drivers/net/ethernet/toshiba/spider_net*
SPMI SUBSYSTEM
--
2.25.4
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