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linux-next/drivers/net/fs_enet/mac-scc.c
Tejun Heo 5a0e3ad6af 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>
2010-03-30 22:02:32 +09:00

485 lines
12 KiB
C
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/*
* Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <panto@intracom.gr>
*
* 2005 (c) MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/fs.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#ifdef CONFIG_8xx
#include <asm/8xx_immap.h>
#include <asm/pgtable.h>
#include <asm/mpc8xx.h>
#include <asm/cpm1.h>
#endif
#include "fs_enet.h"
/*************************************************/
#if defined(CONFIG_CPM1)
/* for a 8xx __raw_xxx's are sufficient */
#define __fs_out32(addr, x) __raw_writel(x, addr)
#define __fs_out16(addr, x) __raw_writew(x, addr)
#define __fs_out8(addr, x) __raw_writeb(x, addr)
#define __fs_in32(addr) __raw_readl(addr)
#define __fs_in16(addr) __raw_readw(addr)
#define __fs_in8(addr) __raw_readb(addr)
#else
/* for others play it safe */
#define __fs_out32(addr, x) out_be32(addr, x)
#define __fs_out16(addr, x) out_be16(addr, x)
#define __fs_in32(addr) in_be32(addr)
#define __fs_in16(addr) in_be16(addr)
#define __fs_out8(addr, x) out_8(addr, x)
#define __fs_in8(addr) in_8(addr)
#endif
/* write, read, set bits, clear bits */
#define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
#define R32(_p, _m) __fs_in32(&(_p)->_m)
#define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
#define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
#define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
#define R16(_p, _m) __fs_in16(&(_p)->_m)
#define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
#define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
#define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
#define R8(_p, _m) __fs_in8(&(_p)->_m)
#define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
#define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
#define SCC_MAX_MULTICAST_ADDRS 64
/*
* Delay to wait for SCC reset command to complete (in us)
*/
#define SCC_RESET_DELAY 50
static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
{
const struct fs_platform_info *fpi = fep->fpi;
return cpm_command(fpi->cp_command, op);
}
static int do_pd_setup(struct fs_enet_private *fep)
{
struct of_device *ofdev = to_of_device(fep->dev);
fep->interrupt = of_irq_to_resource(ofdev->node, 0, NULL);
if (fep->interrupt == NO_IRQ)
return -EINVAL;
fep->scc.sccp = of_iomap(ofdev->node, 0);
if (!fep->scc.sccp)
return -EINVAL;
fep->scc.ep = of_iomap(ofdev->node, 1);
if (!fep->scc.ep) {
iounmap(fep->scc.sccp);
return -EINVAL;
}
return 0;
}
#define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB)
#define SCC_RX_EVENT (SCCE_ENET_RXF)
#define SCC_TX_EVENT (SCCE_ENET_TXB)
#define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY)
static int setup_data(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
do_pd_setup(fep);
fep->scc.hthi = 0;
fep->scc.htlo = 0;
fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
fep->ev_rx = SCC_RX_EVENT;
fep->ev_tx = SCC_TX_EVENT | SCCE_ENET_TXE;
fep->ev_err = SCC_ERR_EVENT_MSK;
return 0;
}
static int allocate_bd(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
const struct fs_platform_info *fpi = fep->fpi;
fep->ring_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
sizeof(cbd_t), 8);
if (IS_ERR_VALUE(fep->ring_mem_addr))
return -ENOMEM;
fep->ring_base = (void __iomem __force*)
cpm_dpram_addr(fep->ring_mem_addr);
return 0;
}
static void free_bd(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->ring_base)
cpm_dpfree(fep->ring_mem_addr);
}
static void cleanup_data(struct net_device *dev)
{
/* nothing */
}
static void set_promiscuous_mode(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
S16(sccp, scc_psmr, SCC_PSMR_PRO);
}
static void set_multicast_start(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_enet_t __iomem *ep = fep->scc.ep;
W16(ep, sen_gaddr1, 0);
W16(ep, sen_gaddr2, 0);
W16(ep, sen_gaddr3, 0);
W16(ep, sen_gaddr4, 0);
}
static void set_multicast_one(struct net_device *dev, const u8 * mac)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_enet_t __iomem *ep = fep->scc.ep;
u16 taddrh, taddrm, taddrl;
taddrh = ((u16) mac[5] << 8) | mac[4];
taddrm = ((u16) mac[3] << 8) | mac[2];
taddrl = ((u16) mac[1] << 8) | mac[0];
W16(ep, sen_taddrh, taddrh);
W16(ep, sen_taddrm, taddrm);
W16(ep, sen_taddrl, taddrl);
scc_cr_cmd(fep, CPM_CR_SET_GADDR);
}
static void set_multicast_finish(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
scc_enet_t __iomem *ep = fep->scc.ep;
/* clear promiscuous always */
C16(sccp, scc_psmr, SCC_PSMR_PRO);
/* if all multi or too many multicasts; just enable all */
if ((dev->flags & IFF_ALLMULTI) != 0 ||
netdev_mc_count(dev) > SCC_MAX_MULTICAST_ADDRS) {
W16(ep, sen_gaddr1, 0xffff);
W16(ep, sen_gaddr2, 0xffff);
W16(ep, sen_gaddr3, 0xffff);
W16(ep, sen_gaddr4, 0xffff);
}
}
static void set_multicast_list(struct net_device *dev)
{
struct dev_mc_list *pmc;
if ((dev->flags & IFF_PROMISC) == 0) {
set_multicast_start(dev);
netdev_for_each_mc_addr(pmc, dev)
set_multicast_one(dev, pmc->dmi_addr);
set_multicast_finish(dev);
} else
set_promiscuous_mode(dev);
}
/*
* This function is called to start or restart the FEC during a link
* change. This only happens when switching between half and full
* duplex.
*/
static void restart(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
scc_enet_t __iomem *ep = fep->scc.ep;
const struct fs_platform_info *fpi = fep->fpi;
u16 paddrh, paddrm, paddrl;
const unsigned char *mac;
int i;
C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
/* clear everything (slow & steady does it) */
for (i = 0; i < sizeof(*ep); i++)
__fs_out8((u8 __iomem *)ep + i, 0);
/* point to bds */
W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
W16(ep, sen_genscc.scc_tbase,
fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);
/* Initialize function code registers for big-endian.
*/
#ifndef CONFIG_NOT_COHERENT_CACHE
W8(ep, sen_genscc.scc_rfcr, SCC_EB | SCC_GBL);
W8(ep, sen_genscc.scc_tfcr, SCC_EB | SCC_GBL);
#else
W8(ep, sen_genscc.scc_rfcr, SCC_EB);
W8(ep, sen_genscc.scc_tfcr, SCC_EB);
#endif
/* Set maximum bytes per receive buffer.
* This appears to be an Ethernet frame size, not the buffer
* fragment size. It must be a multiple of four.
*/
W16(ep, sen_genscc.scc_mrblr, 0x5f0);
/* Set CRC preset and mask.
*/
W32(ep, sen_cpres, 0xffffffff);
W32(ep, sen_cmask, 0xdebb20e3);
W32(ep, sen_crcec, 0); /* CRC Error counter */
W32(ep, sen_alec, 0); /* alignment error counter */
W32(ep, sen_disfc, 0); /* discard frame counter */
W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
W16(ep, sen_retlim, 15); /* Retry limit threshold */
W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */
W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */
/* Clear hash tables.
*/
W16(ep, sen_gaddr1, 0);
W16(ep, sen_gaddr2, 0);
W16(ep, sen_gaddr3, 0);
W16(ep, sen_gaddr4, 0);
W16(ep, sen_iaddr1, 0);
W16(ep, sen_iaddr2, 0);
W16(ep, sen_iaddr3, 0);
W16(ep, sen_iaddr4, 0);
/* set address
*/
mac = dev->dev_addr;
paddrh = ((u16) mac[5] << 8) | mac[4];
paddrm = ((u16) mac[3] << 8) | mac[2];
paddrl = ((u16) mac[1] << 8) | mac[0];
W16(ep, sen_paddrh, paddrh);
W16(ep, sen_paddrm, paddrm);
W16(ep, sen_paddrl, paddrl);
W16(ep, sen_pper, 0);
W16(ep, sen_taddrl, 0);
W16(ep, sen_taddrm, 0);
W16(ep, sen_taddrh, 0);
fs_init_bds(dev);
scc_cr_cmd(fep, CPM_CR_INIT_TRX);
W16(sccp, scc_scce, 0xffff);
/* Enable interrupts we wish to service.
*/
W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
/* Set GSMR_H to enable all normal operating modes.
* Set GSMR_L to enable Ethernet to MC68160.
*/
W32(sccp, scc_gsmrh, 0);
W32(sccp, scc_gsmrl,
SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 |
SCC_GSMRL_MODE_ENET);
/* Set sync/delimiters.
*/
W16(sccp, scc_dsr, 0xd555);
/* Set processing mode. Use Ethernet CRC, catch broadcast, and
* start frame search 22 bit times after RENA.
*/
W16(sccp, scc_psmr, SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
/* Set full duplex mode if needed */
if (fep->phydev->duplex)
S16(sccp, scc_psmr, SCC_PSMR_LPB | SCC_PSMR_FDE);
S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
}
static void stop(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
int i;
for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
udelay(1);
if (i == SCC_RESET_DELAY)
dev_warn(fep->dev, "SCC timeout on graceful transmit stop\n");
W16(sccp, scc_sccm, 0);
C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
fs_cleanup_bds(dev);
}
static void napi_clear_rx_event(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
}
static void napi_enable_rx(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
}
static void napi_disable_rx(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
}
static void rx_bd_done(struct net_device *dev)
{
/* nothing */
}
static void tx_kickstart(struct net_device *dev)
{
/* nothing */
}
static u32 get_int_events(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
return (u32) R16(sccp, scc_scce);
}
static void clear_int_events(struct net_device *dev, u32 int_events)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t __iomem *sccp = fep->scc.sccp;
W16(sccp, scc_scce, int_events & 0xffff);
}
static void ev_error(struct net_device *dev, u32 int_events)
{
struct fs_enet_private *fep = netdev_priv(dev);
dev_warn(fep->dev, "SCC ERROR(s) 0x%x\n", int_events);
}
static int get_regs(struct net_device *dev, void *p, int *sizep)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (*sizep < sizeof(scc_t) + sizeof(scc_enet_t __iomem *))
return -EINVAL;
memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
p = (char *)p + sizeof(scc_t);
memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t __iomem *));
return 0;
}
static int get_regs_len(struct net_device *dev)
{
return sizeof(scc_t) + sizeof(scc_enet_t __iomem *);
}
static void tx_restart(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_cr_cmd(fep, CPM_CR_RESTART_TX);
}
/*************************************************************************/
const struct fs_ops fs_scc_ops = {
.setup_data = setup_data,
.cleanup_data = cleanup_data,
.set_multicast_list = set_multicast_list,
.restart = restart,
.stop = stop,
.napi_clear_rx_event = napi_clear_rx_event,
.napi_enable_rx = napi_enable_rx,
.napi_disable_rx = napi_disable_rx,
.rx_bd_done = rx_bd_done,
.tx_kickstart = tx_kickstart,
.get_int_events = get_int_events,
.clear_int_events = clear_int_events,
.ev_error = ev_error,
.get_regs = get_regs,
.get_regs_len = get_regs_len,
.tx_restart = tx_restart,
.allocate_bd = allocate_bd,
.free_bd = free_bd,
};
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