2006-09-22 00:28:13 +00:00
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/*
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* EP93xx ethernet network device driver
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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* Dedicated to Marija Kulikova.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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2010-01-08 08:53:03 +00:00
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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2006-09-22 00:28:13 +00:00
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#include <linux/dma-mapping.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/mii.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/init.h>
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2011-06-06 10:43:46 +00:00
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#include <linux/interrupt.h>
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2006-09-22 00:28:13 +00:00
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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2010-01-08 08:53:03 +00:00
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#include <linux/io.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2010-01-08 08:53:03 +00:00
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#include <mach/hardware.h>
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2006-09-22 00:28:13 +00:00
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#define DRV_MODULE_NAME "ep93xx-eth"
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#define DRV_MODULE_VERSION "0.1"
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#define RX_QUEUE_ENTRIES 64
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#define TX_QUEUE_ENTRIES 8
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#define MAX_PKT_SIZE 2044
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#define PKT_BUF_SIZE 2048
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#define REG_RXCTL 0x0000
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#define REG_RXCTL_DEFAULT 0x00073800
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#define REG_TXCTL 0x0004
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#define REG_TXCTL_ENABLE 0x00000001
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#define REG_MIICMD 0x0010
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#define REG_MIICMD_READ 0x00008000
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#define REG_MIICMD_WRITE 0x00004000
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#define REG_MIIDATA 0x0014
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#define REG_MIISTS 0x0018
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#define REG_MIISTS_BUSY 0x00000001
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#define REG_SELFCTL 0x0020
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#define REG_SELFCTL_RESET 0x00000001
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#define REG_INTEN 0x0024
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#define REG_INTEN_TX 0x00000008
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#define REG_INTEN_RX 0x00000007
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#define REG_INTSTSP 0x0028
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#define REG_INTSTS_TX 0x00000008
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#define REG_INTSTS_RX 0x00000004
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#define REG_INTSTSC 0x002c
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#define REG_AFP 0x004c
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#define REG_INDAD0 0x0050
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#define REG_INDAD1 0x0051
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#define REG_INDAD2 0x0052
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#define REG_INDAD3 0x0053
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#define REG_INDAD4 0x0054
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#define REG_INDAD5 0x0055
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#define REG_GIINTMSK 0x0064
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#define REG_GIINTMSK_ENABLE 0x00008000
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#define REG_BMCTL 0x0080
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#define REG_BMCTL_ENABLE_TX 0x00000100
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#define REG_BMCTL_ENABLE_RX 0x00000001
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#define REG_BMSTS 0x0084
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#define REG_BMSTS_RX_ACTIVE 0x00000008
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#define REG_RXDQBADD 0x0090
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#define REG_RXDQBLEN 0x0094
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#define REG_RXDCURADD 0x0098
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#define REG_RXDENQ 0x009c
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#define REG_RXSTSQBADD 0x00a0
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#define REG_RXSTSQBLEN 0x00a4
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#define REG_RXSTSQCURADD 0x00a8
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#define REG_RXSTSENQ 0x00ac
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#define REG_TXDQBADD 0x00b0
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#define REG_TXDQBLEN 0x00b4
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#define REG_TXDQCURADD 0x00b8
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#define REG_TXDENQ 0x00bc
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#define REG_TXSTSQBADD 0x00c0
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#define REG_TXSTSQBLEN 0x00c4
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#define REG_TXSTSQCURADD 0x00c8
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#define REG_MAXFRMLEN 0x00e8
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struct ep93xx_rdesc
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{
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u32 buf_addr;
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u32 rdesc1;
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};
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#define RDESC1_NSOF 0x80000000
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#define RDESC1_BUFFER_INDEX 0x7fff0000
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#define RDESC1_BUFFER_LENGTH 0x0000ffff
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struct ep93xx_rstat
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{
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u32 rstat0;
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u32 rstat1;
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};
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#define RSTAT0_RFP 0x80000000
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#define RSTAT0_RWE 0x40000000
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#define RSTAT0_EOF 0x20000000
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#define RSTAT0_EOB 0x10000000
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#define RSTAT0_AM 0x00c00000
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#define RSTAT0_RX_ERR 0x00200000
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#define RSTAT0_OE 0x00100000
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#define RSTAT0_FE 0x00080000
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#define RSTAT0_RUNT 0x00040000
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#define RSTAT0_EDATA 0x00020000
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#define RSTAT0_CRCE 0x00010000
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#define RSTAT0_CRCI 0x00008000
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#define RSTAT0_HTI 0x00003f00
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#define RSTAT1_RFP 0x80000000
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#define RSTAT1_BUFFER_INDEX 0x7fff0000
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#define RSTAT1_FRAME_LENGTH 0x0000ffff
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struct ep93xx_tdesc
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{
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u32 buf_addr;
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u32 tdesc1;
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};
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#define TDESC1_EOF 0x80000000
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#define TDESC1_BUFFER_INDEX 0x7fff0000
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#define TDESC1_BUFFER_ABORT 0x00008000
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#define TDESC1_BUFFER_LENGTH 0x00000fff
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struct ep93xx_tstat
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{
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u32 tstat0;
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};
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#define TSTAT0_TXFP 0x80000000
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#define TSTAT0_TXWE 0x40000000
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#define TSTAT0_FA 0x20000000
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#define TSTAT0_LCRS 0x10000000
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#define TSTAT0_OW 0x04000000
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#define TSTAT0_TXU 0x02000000
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#define TSTAT0_ECOLL 0x01000000
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#define TSTAT0_NCOLL 0x001f0000
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#define TSTAT0_BUFFER_INDEX 0x00007fff
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struct ep93xx_descs
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{
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struct ep93xx_rdesc rdesc[RX_QUEUE_ENTRIES];
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struct ep93xx_tdesc tdesc[TX_QUEUE_ENTRIES];
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struct ep93xx_rstat rstat[RX_QUEUE_ENTRIES];
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struct ep93xx_tstat tstat[TX_QUEUE_ENTRIES];
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};
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struct ep93xx_priv
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{
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struct resource *res;
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2009-04-16 16:56:10 +00:00
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void __iomem *base_addr;
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2006-09-22 00:28:13 +00:00
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int irq;
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struct ep93xx_descs *descs;
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dma_addr_t descs_dma_addr;
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void *rx_buf[RX_QUEUE_ENTRIES];
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void *tx_buf[TX_QUEUE_ENTRIES];
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spinlock_t rx_lock;
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unsigned int rx_pointer;
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unsigned int tx_clean_pointer;
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unsigned int tx_pointer;
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spinlock_t tx_pending_lock;
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unsigned int tx_pending;
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[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
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struct net_device *dev;
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struct napi_struct napi;
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2006-09-22 00:28:13 +00:00
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struct mii_if_info mii;
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u8 mdc_divisor;
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};
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#define rdb(ep, off) __raw_readb((ep)->base_addr + (off))
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#define rdw(ep, off) __raw_readw((ep)->base_addr + (off))
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#define rdl(ep, off) __raw_readl((ep)->base_addr + (off))
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#define wrb(ep, off, val) __raw_writeb((val), (ep)->base_addr + (off))
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#define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
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#define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))
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|
2010-01-08 08:53:03 +00:00
|
|
|
static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
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{
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struct ep93xx_priv *ep = netdev_priv(dev);
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int data;
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int i;
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wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
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for (i = 0; i < 10; i++) {
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if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
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break;
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msleep(1);
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}
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if (i == 10) {
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pr_info("mdio read timed out\n");
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data = 0xffff;
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} else {
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data = rdl(ep, REG_MIIDATA);
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|
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}
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return data;
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}
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|
static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
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{
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struct ep93xx_priv *ep = netdev_priv(dev);
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int i;
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wrl(ep, REG_MIIDATA, data);
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wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
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for (i = 0; i < 10; i++) {
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if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
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break;
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|
msleep(1);
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|
}
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|
if (i == 10)
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|
pr_info("mdio write timed out\n");
|
|
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|
|
}
|
2006-09-22 00:28:13 +00:00
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
static int ep93xx_rx(struct net_device *dev, int processed, int budget)
|
2006-09-22 00:28:13 +00:00
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
while (processed < budget) {
|
2006-09-22 00:28:13 +00:00
|
|
|
int entry;
|
|
|
|
|
struct ep93xx_rstat *rstat;
|
|
|
|
|
u32 rstat0;
|
|
|
|
|
u32 rstat1;
|
|
|
|
|
int length;
|
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
|
|
entry = ep->rx_pointer;
|
|
|
|
|
rstat = ep->descs->rstat + entry;
|
2006-10-30 18:52:31 +00:00
|
|
|
|
|
|
|
|
rstat0 = rstat->rstat0;
|
|
|
|
|
rstat1 = rstat->rstat1;
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
if (!(rstat0 & RSTAT0_RFP) || !(rstat1 & RSTAT1_RFP))
|
2006-09-22 00:28:13 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
rstat->rstat0 = 0;
|
|
|
|
|
rstat->rstat1 = 0;
|
|
|
|
|
|
|
|
|
|
if (!(rstat0 & RSTAT0_EOF))
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
|
2006-09-22 00:28:13 +00:00
|
|
|
if (!(rstat0 & RSTAT0_EOB))
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
|
2006-09-22 00:28:13 +00:00
|
|
|
if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
if (!(rstat0 & RSTAT0_RWE)) {
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
if (rstat0 & RSTAT0_OE)
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_fifo_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
if (rstat0 & RSTAT0_FE)
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_frame_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
if (rstat0 & (RSTAT0_RUNT | RSTAT0_EDATA))
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_length_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
if (rstat0 & RSTAT0_CRCE)
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_crc_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
length = rstat1 & RSTAT1_FRAME_LENGTH;
|
|
|
|
|
if (length > MAX_PKT_SIZE) {
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Strip FCS. */
|
|
|
|
|
if (rstat0 & RSTAT0_CRCI)
|
|
|
|
|
length -= 4;
|
|
|
|
|
|
2012-02-05 02:50:10 +00:00
|
|
|
skb = netdev_alloc_skb(dev, length + 2);
|
2006-09-22 00:28:13 +00:00
|
|
|
if (likely(skb != NULL)) {
|
2011-06-11 08:39:58 +00:00
|
|
|
struct ep93xx_rdesc *rxd = &ep->descs->rdesc[entry];
|
2006-09-22 00:28:13 +00:00
|
|
|
skb_reserve(skb, 2);
|
2011-06-11 08:39:58 +00:00
|
|
|
dma_sync_single_for_cpu(dev->dev.parent, rxd->buf_addr,
|
2006-09-22 00:28:13 +00:00
|
|
|
length, DMA_FROM_DEVICE);
|
2007-07-11 05:08:12 +00:00
|
|
|
skb_copy_to_linear_data(skb, ep->rx_buf[entry], length);
|
2011-06-11 08:39:58 +00:00
|
|
|
dma_sync_single_for_device(dev->dev.parent,
|
|
|
|
|
rxd->buf_addr, length,
|
|
|
|
|
DMA_FROM_DEVICE);
|
2006-09-22 00:28:13 +00:00
|
|
|
skb_put(skb, length);
|
|
|
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
|
|
|
|
|
|
|
|
netif_receive_skb(skb);
|
|
|
|
|
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_packets++;
|
|
|
|
|
dev->stats.rx_bytes += length;
|
2006-09-22 00:28:13 +00:00
|
|
|
} else {
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.rx_dropped++;
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
err:
|
|
|
|
|
ep->rx_pointer = (entry + 1) & (RX_QUEUE_ENTRIES - 1);
|
|
|
|
|
processed++;
|
|
|
|
|
}
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
return processed;
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
|
|
|
|
|
{
|
2006-10-30 18:52:31 +00:00
|
|
|
struct ep93xx_rstat *rstat = ep->descs->rstat + ep->rx_pointer;
|
|
|
|
|
return !!((rstat->rstat0 & RSTAT0_RFP) && (rstat->rstat1 & RSTAT1_RFP));
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
static int ep93xx_poll(struct napi_struct *napi, int budget)
|
2006-09-22 00:28:13 +00:00
|
|
|
{
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
struct ep93xx_priv *ep = container_of(napi, struct ep93xx_priv, napi);
|
|
|
|
|
struct net_device *dev = ep->dev;
|
|
|
|
|
int rx = 0;
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
poll_some_more:
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
rx = ep93xx_rx(dev, rx, budget);
|
|
|
|
|
if (rx < budget) {
|
|
|
|
|
int more = 0;
|
|
|
|
|
|
|
|
|
|
spin_lock_irq(&ep->rx_lock);
|
2009-01-20 00:43:59 +00:00
|
|
|
__napi_complete(napi);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
|
|
|
|
|
if (ep93xx_have_more_rx(ep)) {
|
|
|
|
|
wrl(ep, REG_INTEN, REG_INTEN_TX);
|
|
|
|
|
wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
|
|
|
|
|
more = 1;
|
|
|
|
|
}
|
2006-09-22 00:28:13 +00:00
|
|
|
spin_unlock_irq(&ep->rx_lock);
|
|
|
|
|
|
2009-01-20 00:43:59 +00:00
|
|
|
if (more && napi_reschedule(napi))
|
2006-09-22 00:28:13 +00:00
|
|
|
goto poll_some_more;
|
|
|
|
|
}
|
|
|
|
|
|
2010-05-04 06:21:27 +00:00
|
|
|
if (rx) {
|
|
|
|
|
wrw(ep, REG_RXDENQ, rx);
|
|
|
|
|
wrw(ep, REG_RXSTSENQ, rx);
|
|
|
|
|
}
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
return rx;
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
2011-06-11 08:39:58 +00:00
|
|
|
struct ep93xx_tdesc *txd;
|
2006-09-22 00:28:13 +00:00
|
|
|
int entry;
|
|
|
|
|
|
2006-10-30 18:52:54 +00:00
|
|
|
if (unlikely(skb->len > MAX_PKT_SIZE)) {
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.tx_dropped++;
|
2006-09-22 00:28:13 +00:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
entry = ep->tx_pointer;
|
|
|
|
|
ep->tx_pointer = (ep->tx_pointer + 1) & (TX_QUEUE_ENTRIES - 1);
|
|
|
|
|
|
2011-06-11 08:39:58 +00:00
|
|
|
txd = &ep->descs->tdesc[entry];
|
|
|
|
|
|
|
|
|
|
txd->tdesc1 = TDESC1_EOF | (entry << 16) | (skb->len & 0xfff);
|
|
|
|
|
dma_sync_single_for_cpu(dev->dev.parent, txd->buf_addr, skb->len,
|
|
|
|
|
DMA_TO_DEVICE);
|
2006-09-22 00:28:13 +00:00
|
|
|
skb_copy_and_csum_dev(skb, ep->tx_buf[entry]);
|
2011-06-11 08:39:58 +00:00
|
|
|
dma_sync_single_for_device(dev->dev.parent, txd->buf_addr, skb->len,
|
|
|
|
|
DMA_TO_DEVICE);
|
2006-09-22 00:28:13 +00:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
|
|
|
|
|
spin_lock_irq(&ep->tx_pending_lock);
|
|
|
|
|
ep->tx_pending++;
|
|
|
|
|
if (ep->tx_pending == TX_QUEUE_ENTRIES)
|
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
|
spin_unlock_irq(&ep->tx_pending_lock);
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_TXDENQ, 1);
|
|
|
|
|
|
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ep93xx_tx_complete(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
int wake;
|
|
|
|
|
|
|
|
|
|
wake = 0;
|
|
|
|
|
|
|
|
|
|
spin_lock(&ep->tx_pending_lock);
|
|
|
|
|
while (1) {
|
|
|
|
|
int entry;
|
|
|
|
|
struct ep93xx_tstat *tstat;
|
|
|
|
|
u32 tstat0;
|
|
|
|
|
|
|
|
|
|
entry = ep->tx_clean_pointer;
|
|
|
|
|
tstat = ep->descs->tstat + entry;
|
|
|
|
|
|
|
|
|
|
tstat0 = tstat->tstat0;
|
2006-10-30 18:52:31 +00:00
|
|
|
if (!(tstat0 & TSTAT0_TXFP))
|
|
|
|
|
break;
|
|
|
|
|
|
2006-09-22 00:28:13 +00:00
|
|
|
tstat->tstat0 = 0;
|
|
|
|
|
|
|
|
|
|
if (tstat0 & TSTAT0_FA)
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("frame aborted %.8x\n", tstat0);
|
2006-09-22 00:28:13 +00:00
|
|
|
if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("entry mismatch %.8x\n", tstat0);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
if (tstat0 & TSTAT0_TXWE) {
|
|
|
|
|
int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
|
|
|
|
|
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.tx_packets++;
|
|
|
|
|
dev->stats.tx_bytes += length;
|
2006-09-22 00:28:13 +00:00
|
|
|
} else {
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.tx_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (tstat0 & TSTAT0_OW)
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.tx_window_errors++;
|
2006-09-22 00:28:13 +00:00
|
|
|
if (tstat0 & TSTAT0_TXU)
|
2010-08-18 22:10:34 +00:00
|
|
|
dev->stats.tx_fifo_errors++;
|
|
|
|
|
dev->stats.collisions += (tstat0 >> 16) & 0x1f;
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
ep->tx_clean_pointer = (entry + 1) & (TX_QUEUE_ENTRIES - 1);
|
|
|
|
|
if (ep->tx_pending == TX_QUEUE_ENTRIES)
|
|
|
|
|
wake = 1;
|
|
|
|
|
ep->tx_pending--;
|
|
|
|
|
}
|
|
|
|
|
spin_unlock(&ep->tx_pending_lock);
|
|
|
|
|
|
|
|
|
|
if (wake)
|
|
|
|
|
netif_wake_queue(dev);
|
|
|
|
|
}
|
|
|
|
|
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
|
|
|
static irqreturn_t ep93xx_irq(int irq, void *dev_id)
|
2006-09-22 00:28:13 +00:00
|
|
|
{
|
|
|
|
|
struct net_device *dev = dev_id;
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
u32 status;
|
|
|
|
|
|
|
|
|
|
status = rdl(ep, REG_INTSTSC);
|
|
|
|
|
if (status == 0)
|
|
|
|
|
return IRQ_NONE;
|
|
|
|
|
|
|
|
|
|
if (status & REG_INTSTS_RX) {
|
|
|
|
|
spin_lock(&ep->rx_lock);
|
2009-01-20 00:43:59 +00:00
|
|
|
if (likely(napi_schedule_prep(&ep->napi))) {
|
2006-09-22 00:28:13 +00:00
|
|
|
wrl(ep, REG_INTEN, REG_INTEN_TX);
|
2009-01-20 00:43:59 +00:00
|
|
|
__napi_schedule(&ep->napi);
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
spin_unlock(&ep->rx_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (status & REG_INTSTS_TX)
|
|
|
|
|
ep93xx_tx_complete(dev);
|
|
|
|
|
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ep93xx_free_buffers(struct ep93xx_priv *ep)
|
|
|
|
|
{
|
2011-06-11 08:39:55 +00:00
|
|
|
struct device *dev = ep->dev->dev.parent;
|
2006-09-22 00:28:13 +00:00
|
|
|
int i;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
|
2006-09-22 00:28:13 +00:00
|
|
|
dma_addr_t d;
|
|
|
|
|
|
|
|
|
|
d = ep->descs->rdesc[i].buf_addr;
|
|
|
|
|
if (d)
|
2011-06-11 08:39:56 +00:00
|
|
|
dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_FROM_DEVICE);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
if (ep->rx_buf[i] != NULL)
|
2011-06-11 08:39:56 +00:00
|
|
|
kfree(ep->rx_buf[i]);
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
|
2006-09-22 00:28:13 +00:00
|
|
|
dma_addr_t d;
|
|
|
|
|
|
|
|
|
|
d = ep->descs->tdesc[i].buf_addr;
|
|
|
|
|
if (d)
|
2011-06-11 08:39:56 +00:00
|
|
|
dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_TO_DEVICE);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
if (ep->tx_buf[i] != NULL)
|
2011-06-11 08:39:56 +00:00
|
|
|
kfree(ep->tx_buf[i]);
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
2011-06-11 08:39:55 +00:00
|
|
|
dma_free_coherent(dev, sizeof(struct ep93xx_descs), ep->descs,
|
2006-09-22 00:28:13 +00:00
|
|
|
ep->descs_dma_addr);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
|
|
|
|
|
{
|
2011-06-11 08:39:55 +00:00
|
|
|
struct device *dev = ep->dev->dev.parent;
|
2006-09-22 00:28:13 +00:00
|
|
|
int i;
|
|
|
|
|
|
2011-06-11 08:39:55 +00:00
|
|
|
ep->descs = dma_alloc_coherent(dev, sizeof(struct ep93xx_descs),
|
2011-06-11 08:39:57 +00:00
|
|
|
&ep->descs_dma_addr, GFP_KERNEL);
|
2006-09-22 00:28:13 +00:00
|
|
|
if (ep->descs == NULL)
|
|
|
|
|
return 1;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
|
|
|
|
|
void *buf;
|
2006-09-22 00:28:13 +00:00
|
|
|
dma_addr_t d;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
|
|
|
|
|
if (buf == NULL)
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_FROM_DEVICE);
|
2011-06-11 08:39:55 +00:00
|
|
|
if (dma_mapping_error(dev, d)) {
|
2011-06-11 08:39:56 +00:00
|
|
|
kfree(buf);
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
}
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
ep->rx_buf[i] = buf;
|
2006-09-22 00:28:13 +00:00
|
|
|
ep->descs->rdesc[i].buf_addr = d;
|
|
|
|
|
ep->descs->rdesc[i].rdesc1 = (i << 16) | PKT_BUF_SIZE;
|
|
|
|
|
}
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
|
|
|
|
|
void *buf;
|
2006-09-22 00:28:13 +00:00
|
|
|
dma_addr_t d;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
|
|
|
|
|
if (buf == NULL)
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_TO_DEVICE);
|
2011-06-11 08:39:55 +00:00
|
|
|
if (dma_mapping_error(dev, d)) {
|
2011-06-11 08:39:56 +00:00
|
|
|
kfree(buf);
|
2006-09-22 00:28:13 +00:00
|
|
|
goto err;
|
|
|
|
|
}
|
|
|
|
|
|
2011-06-11 08:39:56 +00:00
|
|
|
ep->tx_buf[i] = buf;
|
2006-09-22 00:28:13 +00:00
|
|
|
ep->descs->tdesc[i].buf_addr = d;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
err:
|
|
|
|
|
ep93xx_free_buffers(ep);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_start_hw(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
unsigned long addr;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
|
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
|
|
|
if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
|
|
|
|
|
break;
|
|
|
|
|
msleep(1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (i == 10) {
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("hw failed to reset\n");
|
2006-09-22 00:28:13 +00:00
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9));
|
|
|
|
|
|
|
|
|
|
/* Does the PHY support preamble suppress? */
|
|
|
|
|
if ((ep93xx_mdio_read(dev, ep->mii.phy_id, MII_BMSR) & 0x0040) != 0)
|
|
|
|
|
wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9) | (1 << 8));
|
|
|
|
|
|
|
|
|
|
/* Receive descriptor ring. */
|
|
|
|
|
addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
|
|
|
|
|
wrl(ep, REG_RXDQBADD, addr);
|
|
|
|
|
wrl(ep, REG_RXDCURADD, addr);
|
|
|
|
|
wrw(ep, REG_RXDQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rdesc));
|
|
|
|
|
|
|
|
|
|
/* Receive status ring. */
|
|
|
|
|
addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rstat);
|
|
|
|
|
wrl(ep, REG_RXSTSQBADD, addr);
|
|
|
|
|
wrl(ep, REG_RXSTSQCURADD, addr);
|
|
|
|
|
wrw(ep, REG_RXSTSQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rstat));
|
|
|
|
|
|
|
|
|
|
/* Transmit descriptor ring. */
|
|
|
|
|
addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tdesc);
|
|
|
|
|
wrl(ep, REG_TXDQBADD, addr);
|
|
|
|
|
wrl(ep, REG_TXDQCURADD, addr);
|
|
|
|
|
wrw(ep, REG_TXDQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tdesc));
|
|
|
|
|
|
|
|
|
|
/* Transmit status ring. */
|
|
|
|
|
addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tstat);
|
|
|
|
|
wrl(ep, REG_TXSTSQBADD, addr);
|
|
|
|
|
wrl(ep, REG_TXSTSQCURADD, addr);
|
|
|
|
|
wrw(ep, REG_TXSTSQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tstat));
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_BMCTL, REG_BMCTL_ENABLE_TX | REG_BMCTL_ENABLE_RX);
|
|
|
|
|
wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
|
|
|
|
|
wrl(ep, REG_GIINTMSK, 0);
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
|
|
|
if ((rdl(ep, REG_BMSTS) & REG_BMSTS_RX_ACTIVE) != 0)
|
|
|
|
|
break;
|
|
|
|
|
msleep(1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (i == 10) {
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("hw failed to start\n");
|
2006-09-22 00:28:13 +00:00
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_RXDENQ, RX_QUEUE_ENTRIES);
|
|
|
|
|
wrl(ep, REG_RXSTSENQ, RX_QUEUE_ENTRIES);
|
|
|
|
|
|
|
|
|
|
wrb(ep, REG_INDAD0, dev->dev_addr[0]);
|
|
|
|
|
wrb(ep, REG_INDAD1, dev->dev_addr[1]);
|
|
|
|
|
wrb(ep, REG_INDAD2, dev->dev_addr[2]);
|
|
|
|
|
wrb(ep, REG_INDAD3, dev->dev_addr[3]);
|
|
|
|
|
wrb(ep, REG_INDAD4, dev->dev_addr[4]);
|
|
|
|
|
wrb(ep, REG_INDAD5, dev->dev_addr[5]);
|
|
|
|
|
wrl(ep, REG_AFP, 0);
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_MAXFRMLEN, (MAX_PKT_SIZE << 16) | MAX_PKT_SIZE);
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_RXCTL, REG_RXCTL_DEFAULT);
|
|
|
|
|
wrl(ep, REG_TXCTL, REG_TXCTL_ENABLE);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ep93xx_stop_hw(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
|
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
|
|
|
if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
|
|
|
|
|
break;
|
|
|
|
|
msleep(1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (i == 10)
|
2010-01-08 08:53:03 +00:00
|
|
|
pr_crit("hw failed to reset\n");
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_open(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
if (ep93xx_alloc_buffers(ep))
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
napi_enable(&ep->napi);
|
|
|
|
|
|
2006-09-22 00:28:13 +00:00
|
|
|
if (ep93xx_start_hw(dev)) {
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
napi_disable(&ep->napi);
|
2006-09-22 00:28:13 +00:00
|
|
|
ep93xx_free_buffers(ep);
|
|
|
|
|
return -EIO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
spin_lock_init(&ep->rx_lock);
|
|
|
|
|
ep->rx_pointer = 0;
|
|
|
|
|
ep->tx_clean_pointer = 0;
|
|
|
|
|
ep->tx_pointer = 0;
|
|
|
|
|
spin_lock_init(&ep->tx_pending_lock);
|
|
|
|
|
ep->tx_pending = 0;
|
|
|
|
|
|
|
|
|
|
err = request_irq(ep->irq, ep93xx_irq, IRQF_SHARED, dev->name, dev);
|
|
|
|
|
if (err) {
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
napi_disable(&ep->napi);
|
2006-09-22 00:28:13 +00:00
|
|
|
ep93xx_stop_hw(dev);
|
|
|
|
|
ep93xx_free_buffers(ep);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_GIINTMSK, REG_GIINTMSK_ENABLE);
|
|
|
|
|
|
|
|
|
|
netif_start_queue(dev);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_close(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
napi_disable(&ep->napi);
|
2006-09-22 00:28:13 +00:00
|
|
|
netif_stop_queue(dev);
|
|
|
|
|
|
|
|
|
|
wrl(ep, REG_GIINTMSK, 0);
|
|
|
|
|
free_irq(ep->irq, dev);
|
|
|
|
|
ep93xx_stop_hw(dev);
|
|
|
|
|
ep93xx_free_buffers(ep);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
struct mii_ioctl_data *data = if_mii(ifr);
|
|
|
|
|
|
|
|
|
|
return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
|
|
|
|
|
{
|
2013-01-06 00:44:26 +00:00
|
|
|
strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
|
|
|
|
|
strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
|
2006-09-22 00:28:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
return mii_ethtool_gset(&ep->mii, cmd);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
return mii_ethtool_sset(&ep->mii, cmd);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_nway_reset(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
return mii_nway_restart(&ep->mii);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static u32 ep93xx_get_link(struct net_device *dev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_priv *ep = netdev_priv(dev);
|
|
|
|
|
return mii_link_ok(&ep->mii);
|
|
|
|
|
}
|
|
|
|
|
|
2009-09-02 08:03:33 +00:00
|
|
|
static const struct ethtool_ops ep93xx_ethtool_ops = {
|
2006-09-22 00:28:13 +00:00
|
|
|
.get_drvinfo = ep93xx_get_drvinfo,
|
|
|
|
|
.get_settings = ep93xx_get_settings,
|
|
|
|
|
.set_settings = ep93xx_set_settings,
|
|
|
|
|
.nway_reset = ep93xx_nway_reset,
|
|
|
|
|
.get_link = ep93xx_get_link,
|
|
|
|
|
};
|
|
|
|
|
|
2009-04-09 17:28:06 +00:00
|
|
|
static const struct net_device_ops ep93xx_netdev_ops = {
|
|
|
|
|
.ndo_open = ep93xx_open,
|
|
|
|
|
.ndo_stop = ep93xx_close,
|
|
|
|
|
.ndo_start_xmit = ep93xx_xmit,
|
|
|
|
|
.ndo_do_ioctl = ep93xx_ioctl,
|
|
|
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
|
|
|
.ndo_change_mtu = eth_change_mtu,
|
|
|
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
|
2006-09-22 00:28:13 +00:00
|
|
|
{
|
|
|
|
|
struct net_device *dev;
|
|
|
|
|
|
|
|
|
|
dev = alloc_etherdev(sizeof(struct ep93xx_priv));
|
|
|
|
|
if (dev == NULL)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
|
|
memcpy(dev->dev_addr, data->dev_addr, ETH_ALEN);
|
|
|
|
|
|
|
|
|
|
dev->ethtool_ops = &ep93xx_ethtool_ops;
|
2009-04-09 17:28:06 +00:00
|
|
|
dev->netdev_ops = &ep93xx_netdev_ops;
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
|
|
|
|
|
|
|
|
|
|
return dev;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int ep93xx_eth_remove(struct platform_device *pdev)
|
|
|
|
|
{
|
|
|
|
|
struct net_device *dev;
|
|
|
|
|
struct ep93xx_priv *ep;
|
|
|
|
|
|
|
|
|
|
dev = platform_get_drvdata(pdev);
|
|
|
|
|
if (dev == NULL)
|
|
|
|
|
return 0;
|
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
|
|
|
|
|
|
ep = netdev_priv(dev);
|
|
|
|
|
|
|
|
|
|
/* @@@ Force down. */
|
|
|
|
|
unregister_netdev(dev);
|
|
|
|
|
ep93xx_free_buffers(ep);
|
|
|
|
|
|
|
|
|
|
if (ep->base_addr != NULL)
|
|
|
|
|
iounmap(ep->base_addr);
|
|
|
|
|
|
|
|
|
|
if (ep->res != NULL) {
|
|
|
|
|
release_resource(ep->res);
|
|
|
|
|
kfree(ep->res);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
free_netdev(dev);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int ep93xx_eth_probe(struct platform_device *pdev)
|
|
|
|
|
{
|
|
|
|
|
struct ep93xx_eth_data *data;
|
|
|
|
|
struct net_device *dev;
|
|
|
|
|
struct ep93xx_priv *ep;
|
2010-01-08 08:53:03 +00:00
|
|
|
struct resource *mem;
|
|
|
|
|
int irq;
|
2006-09-22 00:28:13 +00:00
|
|
|
int err;
|
|
|
|
|
|
|
|
|
|
if (pdev == NULL)
|
|
|
|
|
return -ENODEV;
|
2006-12-19 21:08:48 +00:00
|
|
|
data = pdev->dev.platform_data;
|
2006-09-22 00:28:13 +00:00
|
|
|
|
2010-01-08 08:53:03 +00:00
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
|
|
|
if (!mem || irq < 0)
|
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
2006-09-22 00:28:13 +00:00
|
|
|
dev = ep93xx_dev_alloc(data);
|
|
|
|
|
if (dev == NULL) {
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto err_out;
|
|
|
|
|
}
|
|
|
|
|
ep = netdev_priv(dev);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
ep->dev = dev;
|
2011-06-11 08:39:55 +00:00
|
|
|
SET_NETDEV_DEV(dev, &pdev->dev);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 23:41:36 +00:00
|
|
|
netif_napi_add(dev, &ep->napi, ep93xx_poll, 64);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
|
|
2010-01-08 08:53:03 +00:00
|
|
|
ep->res = request_mem_region(mem->start, resource_size(mem),
|
|
|
|
|
dev_name(&pdev->dev));
|
2006-09-22 00:28:13 +00:00
|
|
|
if (ep->res == NULL) {
|
|
|
|
|
dev_err(&pdev->dev, "Could not reserve memory region\n");
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto err_out;
|
|
|
|
|
}
|
|
|
|
|
|
2010-01-08 08:53:03 +00:00
|
|
|
ep->base_addr = ioremap(mem->start, resource_size(mem));
|
2006-09-22 00:28:13 +00:00
|
|
|
if (ep->base_addr == NULL) {
|
|
|
|
|
dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
|
|
|
|
|
err = -EIO;
|
|
|
|
|
goto err_out;
|
|
|
|
|
}
|
2010-01-08 08:53:03 +00:00
|
|
|
ep->irq = irq;
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
ep->mii.phy_id = data->phy_id;
|
|
|
|
|
ep->mii.phy_id_mask = 0x1f;
|
|
|
|
|
ep->mii.reg_num_mask = 0x1f;
|
|
|
|
|
ep->mii.dev = dev;
|
|
|
|
|
ep->mii.mdio_read = ep93xx_mdio_read;
|
|
|
|
|
ep->mii.mdio_write = ep93xx_mdio_write;
|
|
|
|
|
ep->mdc_divisor = 40; /* Max HCLK 100 MHz, min MDIO clk 2.5 MHz. */
|
|
|
|
|
|
2009-11-28 13:57:00 +00:00
|
|
|
if (is_zero_ether_addr(dev->dev_addr))
|
2012-02-15 06:45:39 +00:00
|
|
|
eth_hw_addr_random(dev);
|
2009-11-28 13:57:00 +00:00
|
|
|
|
2006-09-22 00:28:13 +00:00
|
|
|
err = register_netdev(dev);
|
|
|
|
|
if (err) {
|
|
|
|
|
dev_err(&pdev->dev, "Failed to register netdev\n");
|
|
|
|
|
goto err_out;
|
|
|
|
|
}
|
|
|
|
|
|
2010-01-08 08:53:03 +00:00
|
|
|
printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
|
|
|
|
|
dev->name, ep->irq, dev->dev_addr);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
err_out:
|
|
|
|
|
ep93xx_eth_remove(pdev);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static struct platform_driver ep93xx_eth_driver = {
|
|
|
|
|
.probe = ep93xx_eth_probe,
|
|
|
|
|
.remove = ep93xx_eth_remove,
|
|
|
|
|
.driver = {
|
|
|
|
|
.name = "ep93xx-eth",
|
2008-04-18 20:50:44 +00:00
|
|
|
.owner = THIS_MODULE,
|
2006-09-22 00:28:13 +00:00
|
|
|
},
|
|
|
|
|
};
|
|
|
|
|
|
2013-03-18 01:50:47 +00:00
|
|
|
module_platform_driver(ep93xx_eth_driver);
|
2006-09-22 00:28:13 +00:00
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
2008-04-18 20:50:44 +00:00
|
|
|
MODULE_ALIAS("platform:ep93xx-eth");
|