korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-19 02:04:19 +08:00
Code Issues Packages Projects Releases Wiki Activity
fa56ac9792
linux/drivers/atm/lanai.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

2604 lines
80 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/* lanai.c -- Copyright 1999-2003 by Mitchell Blank Jr <mitch@sfgoth.com>
*
* This driver supports ATM cards based on the Efficient "Lanai"
* chipset such as the Speedstream 3010 and the ENI-25p. The
* Speedstream 3060 is currently not supported since we don't
* have the code to drive the on-board Alcatel DSL chipset (yet).
*
* Thanks to Efficient for supporting this project with hardware,
* documentation, and by answering my questions.
*
* Things not working yet:
*
* o We don't support the Speedstream 3060 yet - this card has
* an on-board DSL modem chip by Alcatel and the driver will
* need some extra code added to handle it
*
* o Note that due to limitations of the Lanai only one VCC can be
* in CBR at once
*
* o We don't currently parse the EEPROM at all. The code is all
* there as per the spec, but it doesn't actually work. I think
* there may be some issues with the docs. Anyway, do NOT
* enable it yet - bugs in that code may actually damage your
* hardware! Because of this you should hardware an ESI before
* trying to use this in a LANE or MPOA environment.
*
* o AAL0 is stubbed in but the actual rx/tx path isn't written yet:
* vcc_tx_aal0() needs to send or queue a SKB
* vcc_tx_unqueue_aal0() needs to attempt to send queued SKBs
* vcc_rx_aal0() needs to handle AAL0 interrupts
* This isn't too much work - I just wanted to get other things
* done first.
*
* o lanai_change_qos() isn't written yet
*
* o There aren't any ioctl's yet -- I'd like to eventually support
* setting loopback and LED modes that way.
*
* o If the segmentation engine or DMA gets shut down we should restart
* card as per section 17.0i. (see lanai_reset)
*
* o setsockopt(SO_CIRANGE) isn't done (although despite what the
* API says it isn't exactly commonly implemented)
*/
/* Version history:
* v.1.00 -- 26-JUL-2003 -- PCI/DMA updates
* v.0.02 -- 11-JAN-2000 -- Endian fixes
* v.0.01 -- 30-NOV-1999 -- Initial release
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/atmdev.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
/* -------------------- TUNABLE PARAMATERS: */
/*
* Maximum number of VCIs per card. Setting it lower could theoretically
* save some memory, but since we allocate our vcc list with get_free_pages,
* it's not really likely for most architectures
*/
#define NUM_VCI (1024)
/*
* Enable extra debugging
*/
#define DEBUG
/*
* Debug _all_ register operations with card, except the memory test.
* Also disables the timed poll to prevent extra chattiness. This
* isn't for normal use
*/
#undef DEBUG_RW
/*
* The programming guide specifies a full test of the on-board SRAM
* at initialization time. Undefine to remove this
*/
#define FULL_MEMORY_TEST
/*
* This is the number of (4 byte) service entries that we will
* try to allocate at startup. Note that we will end up with
* one PAGE_SIZE's worth regardless of what this is set to
*/
#define SERVICE_ENTRIES (1024)
/* TODO: make above a module load-time option */
/*
* We normally read the onboard EEPROM in order to discover our MAC
* address. Undefine to _not_ do this
*/
/* #define READ_EEPROM */ /* ***DONT ENABLE YET*** */
/* TODO: make above a module load-time option (also) */
/*
* Depth of TX fifo (in 128 byte units; range 2-31)
* Smaller numbers are better for network latency
* Larger numbers are better for PCI latency
* I'm really sure where the best tradeoff is, but the BSD driver uses
* 7 and it seems to work ok.
*/
#define TX_FIFO_DEPTH (7)
/* TODO: make above a module load-time option */
/*
* How often (in jiffies) we will try to unstick stuck connections -
* shouldn't need to happen much
*/
#define LANAI_POLL_PERIOD (10*HZ)
/* TODO: make above a module load-time option */
/*
* When allocating an AAL5 receiving buffer, try to make it at least
* large enough to hold this many max_sdu sized PDUs
*/
#define AAL5_RX_MULTIPLIER (3)
/* TODO: make above a module load-time option */
/*
* Same for transmitting buffer
*/
#define AAL5_TX_MULTIPLIER (3)
/* TODO: make above a module load-time option */
/*
* When allocating an AAL0 transmiting buffer, how many cells should fit.
* Remember we'll end up with a PAGE_SIZE of them anyway, so this isn't
* really critical
*/
#define AAL0_TX_MULTIPLIER (40)
/* TODO: make above a module load-time option */
/*
* How large should we make the AAL0 receiving buffer. Remember that this
* is shared between all AAL0 VC's
*/
#define AAL0_RX_BUFFER_SIZE (PAGE_SIZE)
/* TODO: make above a module load-time option */
/*
* Should we use Lanai's "powerdown" feature when no vcc's are bound?
*/
/* #define USE_POWERDOWN */
/* TODO: make above a module load-time option (also) */
/* -------------------- DEBUGGING AIDS: */
#define DEV_LABEL "lanai"
#ifdef DEBUG
#define DPRINTK(format, args...) \
printk(KERN_DEBUG DEV_LABEL ": " format, ##args)
#define APRINTK(truth, format, args...) \
do { \
if (unlikely(!(truth))) \
printk(KERN_ERR DEV_LABEL ": " format, ##args); \
} while (0)
#else /* !DEBUG */
#define DPRINTK(format, args...)
#define APRINTK(truth, format, args...)
#endif /* DEBUG */
#ifdef DEBUG_RW
#define RWDEBUG(format, args...) \
printk(KERN_DEBUG DEV_LABEL ": " format, ##args)
#else /* !DEBUG_RW */
#define RWDEBUG(format, args...)
#endif
/* -------------------- DATA DEFINITIONS: */
#define LANAI_MAPPING_SIZE (0x40000)
#define LANAI_EEPROM_SIZE (128)
typedef int vci_t;
typedef void __iomem *bus_addr_t;
/* DMA buffer in host memory for TX, RX, or service list. */
struct lanai_buffer {
u32 *start; /* From get_free_pages */
u32 *end; /* One past last byte */
u32 *ptr; /* Pointer to current host location */
dma_addr_t dmaaddr;
};
struct lanai_vcc_stats {
unsigned rx_nomem;
union {
struct {
unsigned rx_badlen;
unsigned service_trash;
unsigned service_stream;
unsigned service_rxcrc;
} aal5;
struct {
} aal0;
} x;
};
struct lanai_dev; /* Forward declaration */
/*
* This is the card-specific per-vcc data. Note that unlike some other
* drivers there is NOT a 1-to-1 correspondance between these and
* atm_vcc's - each one of these represents an actual 2-way vcc, but
* an atm_vcc can be 1-way and share with a 1-way vcc in the other
* direction. To make it weirder, there can even be 0-way vccs
* bound to us, waiting to do a change_qos
*/
struct lanai_vcc {
bus_addr_t vbase; /* Base of VCC's registers */
struct lanai_vcc_stats stats;
int nref; /* # of atm_vcc's who reference us */
vci_t vci;
struct {
struct lanai_buffer buf;
struct atm_vcc *atmvcc; /* atm_vcc who is receiver */
} rx;
struct {
struct lanai_buffer buf;
struct atm_vcc *atmvcc; /* atm_vcc who is transmitter */
int endptr; /* last endptr from service entry */
struct sk_buff_head backlog;
void (*unqueue)(struct lanai_dev *, struct lanai_vcc *, int);
} tx;
};
enum lanai_type {
lanai2 = PCI_DEVICE_ID_EF_ATM_LANAI2,
lanaihb = PCI_DEVICE_ID_EF_ATM_LANAIHB
};
struct lanai_dev_stats {
unsigned ovfl_trash; /* # of cells dropped - buffer overflow */
unsigned vci_trash; /* # of cells dropped - closed vci */
unsigned hec_err; /* # of cells dropped - bad HEC */
unsigned atm_ovfl; /* # of cells dropped - rx fifo overflow */
unsigned pcierr_parity_detect;
unsigned pcierr_serr_set;
unsigned pcierr_master_abort;
unsigned pcierr_m_target_abort;
unsigned pcierr_s_target_abort;
unsigned pcierr_master_parity;
unsigned service_notx;
unsigned service_norx;
unsigned service_rxnotaal5;
unsigned dma_reenable;
unsigned card_reset;
};
struct lanai_dev {
bus_addr_t base;
struct lanai_dev_stats stats;
struct lanai_buffer service;
struct lanai_vcc **vccs;
#ifdef USE_POWERDOWN
int nbound; /* number of bound vccs */
#endif
enum lanai_type type;
vci_t num_vci; /* Currently just NUM_VCI */
u8 eeprom[LANAI_EEPROM_SIZE];
u32 serialno, magicno;
struct pci_dev *pci;
DECLARE_BITMAP(backlog_vccs, NUM_VCI); /* VCCs with tx backlog */
DECLARE_BITMAP(transmit_ready, NUM_VCI); /* VCCs with transmit space */
struct timer_list timer;
int naal0;
struct lanai_buffer aal0buf; /* AAL0 RX buffers */
u32 conf1, conf2; /* CONFIG[12] registers */
u32 status; /* STATUS register */
spinlock_t endtxlock;
spinlock_t servicelock;
struct atm_vcc *cbrvcc;
int number;
int board_rev;
/* TODO - look at race conditions with maintence of conf1/conf2 */
/* TODO - transmit locking: should we use _irq not _irqsave? */
/* TODO - organize above in some rational fashion (see <asm/cache.h>) */
};
/*
* Each device has two bitmaps for each VCC (baclog_vccs and transmit_ready)
* This function iterates one of these, calling a given function for each
* vci with their bit set
*/
static void vci_bitfield_iterate(struct lanai_dev *lanai,
const unsigned long *lp,
void (*func)(struct lanai_dev *,vci_t vci))
{
vci_t vci;
for_each_set_bit(vci, lp, NUM_VCI)
func(lanai, vci);
}
/* -------------------- BUFFER UTILITIES: */
/*
* Lanai needs DMA buffers aligned to 256 bytes of at least 1024 bytes -
* usually any page allocation will do. Just to be safe in case
* PAGE_SIZE is insanely tiny, though...
*/
#define LANAI_PAGE_SIZE ((PAGE_SIZE >= 1024) ? PAGE_SIZE : 1024)
/*
* Allocate a buffer in host RAM for service list, RX, or TX
* Returns buf->start==NULL if no memory
* Note that the size will be rounded up 2^n bytes, and
* if we can't allocate that we'll settle for something smaller
* until minbytes
*/
static void lanai_buf_allocate(struct lanai_buffer *buf,
size_t bytes, size_t minbytes, struct pci_dev *pci)
{
int size;
if (bytes > (128 * 1024)) /* max lanai buffer size */
bytes = 128 * 1024;
for (size = LANAI_PAGE_SIZE; size < bytes; size *= 2)
;
if (minbytes < LANAI_PAGE_SIZE)
minbytes = LANAI_PAGE_SIZE;
do {
/*
* Technically we could use non-consistent mappings for
* everything, but the way the lanai uses DMA memory would
* make that a terrific pain. This is much simpler.
*/
buf->start = dma_alloc_coherent(&pci->dev,
size, &buf->dmaaddr, GFP_KERNEL);
if (buf->start != NULL) { /* Success */
/* Lanai requires 256-byte alignment of DMA bufs */
APRINTK((buf->dmaaddr & ~0xFFFFFF00) == 0,
"bad dmaaddr: 0x%lx\n",
(unsigned long) buf->dmaaddr);
buf->ptr = buf->start;
buf->end = (u32 *)
(&((unsigned char *) buf->start)[size]);
memset(buf->start, 0, size);
break;
}
size /= 2;
} while (size >= minbytes);
}
/* size of buffer in bytes */
static inline size_t lanai_buf_size(const struct lanai_buffer *buf)
{
return ((unsigned long) buf->end) - ((unsigned long) buf->start);
}
static void lanai_buf_deallocate(struct lanai_buffer *buf,
struct pci_dev *pci)
{
if (buf->start != NULL) {
dma_free_coherent(&pci->dev, lanai_buf_size(buf),
buf->start, buf->dmaaddr);
buf->start = buf->end = buf->ptr = NULL;
}
}
/* size of buffer as "card order" (0=1k .. 7=128k) */
static int lanai_buf_size_cardorder(const struct lanai_buffer *buf)
{
int order = get_order(lanai_buf_size(buf)) + (PAGE_SHIFT - 10);
/* This can only happen if PAGE_SIZE is gigantic, but just in case */
if (order > 7)
order = 7;
return order;
}
/* -------------------- PORT I/O UTILITIES: */
/* Registers (and their bit-fields) */
enum lanai_register {
Reset_Reg = 0x00, /* Reset; read for chip type; bits: */
#define RESET_GET_BOARD_REV(x) (((x)>> 0)&0x03) /* Board revision */
#define RESET_GET_BOARD_ID(x) (((x)>> 2)&0x03) /* Board ID */
#define BOARD_ID_LANAI256 (0) /* 25.6M adapter card */
Endian_Reg = 0x04, /* Endian setting */
IntStatus_Reg = 0x08, /* Interrupt status */
IntStatusMasked_Reg = 0x0C, /* Interrupt status (masked) */
IntAck_Reg = 0x10, /* Interrupt acknowledge */
IntAckMasked_Reg = 0x14, /* Interrupt acknowledge (masked) */
IntStatusSet_Reg = 0x18, /* Get status + enable/disable */
IntStatusSetMasked_Reg = 0x1C, /* Get status + en/di (masked) */
IntControlEna_Reg = 0x20, /* Interrupt control enable */
IntControlDis_Reg = 0x24, /* Interrupt control disable */
Status_Reg = 0x28, /* Status */
#define STATUS_PROMDATA (0x00000001) /* PROM_DATA pin */
#define STATUS_WAITING (0x00000002) /* Interrupt being delayed */
#define STATUS_SOOL (0x00000004) /* SOOL alarm */
#define STATUS_LOCD (0x00000008) /* LOCD alarm */
#define STATUS_LED (0x00000010) /* LED (HAPPI) output */
#define STATUS_GPIN (0x00000020) /* GPIN pin */
#define STATUS_BUTTBUSY (0x00000040) /* Butt register is pending */
Config1_Reg = 0x2C, /* Config word 1; bits: */
#define CONFIG1_PROMDATA (0x00000001) /* PROM_DATA pin */
#define CONFIG1_PROMCLK (0x00000002) /* PROM_CLK pin */
#define CONFIG1_SET_READMODE(x) ((x)*0x004) /* PCI BM reads; values: */
#define READMODE_PLAIN (0) /* Plain memory read */
#define READMODE_LINE (2) /* Memory read line */
#define READMODE_MULTIPLE (3) /* Memory read multiple */
#define CONFIG1_DMA_ENABLE (0x00000010) /* Turn on DMA */
#define CONFIG1_POWERDOWN (0x00000020) /* Turn off clocks */
#define CONFIG1_SET_LOOPMODE(x) ((x)*0x080) /* Clock&loop mode; values: */
#define LOOPMODE_NORMAL (0) /* Normal - no loop */
#define LOOPMODE_TIME (1)
#define LOOPMODE_DIAG (2)
#define LOOPMODE_LINE (3)
#define CONFIG1_MASK_LOOPMODE (0x00000180)
#define CONFIG1_SET_LEDMODE(x) ((x)*0x0200) /* Mode of LED; values: */
#define LEDMODE_NOT_SOOL (0) /* !SOOL */
#define LEDMODE_OFF (1) /* 0 */
#define LEDMODE_ON (2) /* 1 */
#define LEDMODE_NOT_LOCD (3) /* !LOCD */
#define LEDMORE_GPIN (4) /* GPIN */
#define LEDMODE_NOT_GPIN (7) /* !GPIN */
#define CONFIG1_MASK_LEDMODE (0x00000E00)
#define CONFIG1_GPOUT1 (0x00001000) /* Toggle for reset */
#define CONFIG1_GPOUT2 (0x00002000) /* Loopback PHY */
#define CONFIG1_GPOUT3 (0x00004000) /* Loopback lanai */
Config2_Reg = 0x30, /* Config word 2; bits: */
#define CONFIG2_HOWMANY (0x00000001) /* >512 VCIs? */
#define CONFIG2_PTI7_MODE (0x00000002) /* Make PTI=7 RM, not OAM */
#define CONFIG2_VPI_CHK_DIS (0x00000004) /* Ignore RX VPI value */
#define CONFIG2_HEC_DROP (0x00000008) /* Drop cells w/ HEC errors */
#define CONFIG2_VCI0_NORMAL (0x00000010) /* Treat VCI=0 normally */
#define CONFIG2_CBR_ENABLE (0x00000020) /* Deal with CBR traffic */
#define CONFIG2_TRASH_ALL (0x00000040) /* Trashing incoming cells */
#define CONFIG2_TX_DISABLE (0x00000080) /* Trashing outgoing cells */
#define CONFIG2_SET_TRASH (0x00000100) /* Turn trashing on */
Statistics_Reg = 0x34, /* Statistics; bits: */
#define STATS_GET_FIFO_OVFL(x) (((x)>> 0)&0xFF) /* FIFO overflowed */
#define STATS_GET_HEC_ERR(x) (((x)>> 8)&0xFF) /* HEC was bad */
#define STATS_GET_BAD_VCI(x) (((x)>>16)&0xFF) /* VCI not open */
#define STATS_GET_BUF_OVFL(x) (((x)>>24)&0xFF) /* VCC buffer full */
ServiceStuff_Reg = 0x38, /* Service stuff; bits: */
#define SSTUFF_SET_SIZE(x) ((x)*0x20000000) /* size of service buffer */
#define SSTUFF_SET_ADDR(x) ((x)>>8) /* set address of buffer */
ServWrite_Reg = 0x3C, /* ServWrite Pointer */
ServRead_Reg = 0x40, /* ServRead Pointer */
TxDepth_Reg = 0x44, /* FIFO Transmit Depth */
Butt_Reg = 0x48, /* Butt register */
CBR_ICG_Reg = 0x50,
CBR_PTR_Reg = 0x54,
PingCount_Reg = 0x58, /* Ping count */
DMA_Addr_Reg = 0x5C /* DMA address */
};
static inline bus_addr_t reg_addr(const struct lanai_dev *lanai,
enum lanai_register reg)
{
return lanai->base + reg;
}
static inline u32 reg_read(const struct lanai_dev *lanai,
enum lanai_register reg)
{
u32 t;
t = readl(reg_addr(lanai, reg));
RWDEBUG("R [0x%08X] 0x%02X = 0x%08X\n", (unsigned int) lanai->base,
(int) reg, t);
return t;
}
static inline void reg_write(const struct lanai_dev *lanai, u32 val,
enum lanai_register reg)
{
RWDEBUG("W [0x%08X] 0x%02X < 0x%08X\n", (unsigned int) lanai->base,
(int) reg, val);
writel(val, reg_addr(lanai, reg));
}
static inline void conf1_write(const struct lanai_dev *lanai)
{
reg_write(lanai, lanai->conf1, Config1_Reg);
}
static inline void conf2_write(const struct lanai_dev *lanai)
{
reg_write(lanai, lanai->conf2, Config2_Reg);
}
/* Same as conf2_write(), but defers I/O if we're powered down */
static inline void conf2_write_if_powerup(const struct lanai_dev *lanai)
{
#ifdef USE_POWERDOWN
if (unlikely((lanai->conf1 & CONFIG1_POWERDOWN) != 0))
return;
#endif /* USE_POWERDOWN */
conf2_write(lanai);
}
static inline void reset_board(const struct lanai_dev *lanai)
{
DPRINTK("about to reset board\n");
reg_write(lanai, 0, Reset_Reg);
/*
* If we don't delay a little while here then we can end up
* leaving the card in a VERY weird state and lock up the
* PCI bus. This isn't documented anywhere but I've convinced
* myself after a lot of painful experimentation
*/
udelay(5);
}
/* -------------------- CARD SRAM UTILITIES: */
/* The SRAM is mapped into normal PCI memory space - the only catch is
* that it is only 16-bits wide but must be accessed as 32-bit. The
* 16 high bits will be zero. We don't hide this, since they get
* programmed mostly like discrete registers anyway
*/
#define SRAM_START (0x20000)
#define SRAM_BYTES (0x20000) /* Again, half don't really exist */
static inline bus_addr_t sram_addr(const struct lanai_dev *lanai, int offset)
{
return lanai->base + SRAM_START + offset;
}
static inline u32 sram_read(const struct lanai_dev *lanai, int offset)
{
return readl(sram_addr(lanai, offset));
}
static inline void sram_write(const struct lanai_dev *lanai,
u32 val, int offset)
{
writel(val, sram_addr(lanai, offset));
}
static int sram_test_word(const struct lanai_dev *lanai, int offset,
u32 pattern)
{
u32 readback;
sram_write(lanai, pattern, offset);
readback = sram_read(lanai, offset);
if (likely(readback == pattern))
return 0;
printk(KERN_ERR DEV_LABEL
"(itf %d): SRAM word at %d bad: wrote 0x%X, read 0x%X\n",
lanai->number, offset,
(unsigned int) pattern, (unsigned int) readback);
return -EIO;
}
static int sram_test_pass(const struct lanai_dev *lanai, u32 pattern)
{
int offset, result = 0;
for (offset = 0; offset < SRAM_BYTES && result == 0; offset += 4)
result = sram_test_word(lanai, offset, pattern);
return result;
}
static int sram_test_and_clear(const struct lanai_dev *lanai)
{
#ifdef FULL_MEMORY_TEST
int result;
DPRINTK("testing SRAM\n");
if ((result = sram_test_pass(lanai, 0x5555)) != 0)
return result;
if ((result = sram_test_pass(lanai, 0xAAAA)) != 0)
return result;
#endif
DPRINTK("clearing SRAM\n");
return sram_test_pass(lanai, 0x0000);
}
/* -------------------- CARD-BASED VCC TABLE UTILITIES: */
/* vcc table */
enum lanai_vcc_offset {
vcc_rxaddr1 = 0x00, /* Location1, plus bits: */
#define RXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of RX buffer */
#define RXADDR1_SET_RMMODE(x) ((x)*0x00800) /* RM cell action; values: */
#define RMMODE_TRASH (0) /* discard */
#define RMMODE_PRESERVE (1) /* input as AAL0 */
#define RMMODE_PIPE (2) /* pipe to coscheduler */
#define RMMODE_PIPEALL (3) /* pipe non-RM too */
#define RXADDR1_OAM_PRESERVE (0x00002000) /* Input OAM cells as AAL0 */
#define RXADDR1_SET_MODE(x) ((x)*0x0004000) /* Reassembly mode */
#define RXMODE_TRASH (0) /* discard */
#define RXMODE_AAL0 (1) /* non-AAL5 mode */
#define RXMODE_AAL5 (2) /* AAL5, intr. each PDU */
#define RXMODE_AAL5_STREAM (3) /* AAL5 w/o per-PDU intr */
vcc_rxaddr2 = 0x04, /* Location2 */
vcc_rxcrc1 = 0x08, /* RX CRC claculation space */
vcc_rxcrc2 = 0x0C,
vcc_rxwriteptr = 0x10, /* RX writeptr, plus bits: */
#define RXWRITEPTR_LASTEFCI (0x00002000) /* Last PDU had EFCI bit */
#define RXWRITEPTR_DROPPING (0x00004000) /* Had error, dropping */
#define RXWRITEPTR_TRASHING (0x00008000) /* Trashing */
vcc_rxbufstart = 0x14, /* RX bufstart, plus bits: */
#define RXBUFSTART_CLP (0x00004000)
#define RXBUFSTART_CI (0x00008000)
vcc_rxreadptr = 0x18, /* RX readptr */
vcc_txicg = 0x1C, /* TX ICG */
vcc_txaddr1 = 0x20, /* Location1, plus bits: */
#define TXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of TX buffer */
#define TXADDR1_ABR (0x00008000) /* use ABR (doesn't work) */
vcc_txaddr2 = 0x24, /* Location2 */
vcc_txcrc1 = 0x28, /* TX CRC claculation space */
vcc_txcrc2 = 0x2C,
vcc_txreadptr = 0x30, /* TX Readptr, plus bits: */
#define TXREADPTR_GET_PTR(x) ((x)&0x01FFF)
#define TXREADPTR_MASK_DELTA (0x0000E000) /* ? */
vcc_txendptr = 0x34, /* TX Endptr, plus bits: */
#define TXENDPTR_CLP (0x00002000)
#define TXENDPTR_MASK_PDUMODE (0x0000C000) /* PDU mode; values: */
#define PDUMODE_AAL0 (0*0x04000)
#define PDUMODE_AAL5 (2*0x04000)
#define PDUMODE_AAL5STREAM (3*0x04000)
vcc_txwriteptr = 0x38, /* TX Writeptr */
#define TXWRITEPTR_GET_PTR(x) ((x)&0x1FFF)
vcc_txcbr_next = 0x3C /* # of next CBR VCI in ring */
#define TXCBR_NEXT_BOZO (0x00008000) /* "bozo bit" */
};
#define CARDVCC_SIZE (0x40)
static inline bus_addr_t cardvcc_addr(const struct lanai_dev *lanai,
vci_t vci)
{
return sram_addr(lanai, vci * CARDVCC_SIZE);
}
static inline u32 cardvcc_read(const struct lanai_vcc *lvcc,
enum lanai_vcc_offset offset)
{
u32 val;
APRINTK(lvcc->vbase != NULL, "cardvcc_read: unbound vcc!\n");
val= readl(lvcc->vbase + offset);
RWDEBUG("VR vci=%04d 0x%02X = 0x%08X\n",
lvcc->vci, (int) offset, val);
return val;
}
static inline void cardvcc_write(const struct lanai_vcc *lvcc,
u32 val, enum lanai_vcc_offset offset)
{
APRINTK(lvcc->vbase != NULL, "cardvcc_write: unbound vcc!\n");
APRINTK((val & ~0xFFFF) == 0,
"cardvcc_write: bad val 0x%X (vci=%d, addr=0x%02X)\n",
(unsigned int) val, lvcc->vci, (unsigned int) offset);
RWDEBUG("VW vci=%04d 0x%02X > 0x%08X\n",
lvcc->vci, (unsigned int) offset, (unsigned int) val);
writel(val, lvcc->vbase + offset);
}
/* -------------------- COMPUTE SIZE OF AN AAL5 PDU: */
/* How many bytes will an AAL5 PDU take to transmit - remember that:
* o we need to add 8 bytes for length, CPI, UU, and CRC
* o we need to round up to 48 bytes for cells
*/
static inline int aal5_size(int size)
{
int cells = (size + 8 + 47) / 48;
return cells * 48;
}
/* -------------------- FREE AN ATM SKB: */
static inline void lanai_free_skb(struct atm_vcc *atmvcc, struct sk_buff *skb)
{
if (atmvcc->pop != NULL)
atmvcc->pop(atmvcc, skb);
else
dev_kfree_skb_any(skb);
}
/* -------------------- TURN VCCS ON AND OFF: */
static void host_vcc_start_rx(const struct lanai_vcc *lvcc)
{
u32 addr1;
if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5) {
dma_addr_t dmaaddr = lvcc->rx.buf.dmaaddr;
cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc1);
cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc2);
cardvcc_write(lvcc, 0, vcc_rxwriteptr);
cardvcc_write(lvcc, 0, vcc_rxbufstart);
cardvcc_write(lvcc, 0, vcc_rxreadptr);
cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_rxaddr2);
addr1 = ((dmaaddr >> 8) & 0xFF) |
RXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->rx.buf))|
RXADDR1_SET_RMMODE(RMMODE_TRASH) | /* ??? */
/* RXADDR1_OAM_PRESERVE | --- no OAM support yet */
RXADDR1_SET_MODE(RXMODE_AAL5);
} else
addr1 = RXADDR1_SET_RMMODE(RMMODE_PRESERVE) | /* ??? */
RXADDR1_OAM_PRESERVE | /* ??? */
RXADDR1_SET_MODE(RXMODE_AAL0);
/* This one must be last! */
cardvcc_write(lvcc, addr1, vcc_rxaddr1);
}
static void host_vcc_start_tx(const struct lanai_vcc *lvcc)
{
dma_addr_t dmaaddr = lvcc->tx.buf.dmaaddr;
cardvcc_write(lvcc, 0, vcc_txicg);
cardvcc_write(lvcc, 0xFFFF, vcc_txcrc1);
cardvcc_write(lvcc, 0xFFFF, vcc_txcrc2);
cardvcc_write(lvcc, 0, vcc_txreadptr);
cardvcc_write(lvcc, 0, vcc_txendptr);
cardvcc_write(lvcc, 0, vcc_txwriteptr);
cardvcc_write(lvcc,
(lvcc->tx.atmvcc->qos.txtp.traffic_class == ATM_CBR) ?
TXCBR_NEXT_BOZO | lvcc->vci : 0, vcc_txcbr_next);
cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_txaddr2);
cardvcc_write(lvcc,
((dmaaddr >> 8) & 0xFF) |
TXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->tx.buf)),
vcc_txaddr1);
}
/* Shutdown receiving on card */
static void lanai_shutdown_rx_vci(const struct lanai_vcc *lvcc)
{
if (lvcc->vbase == NULL) /* We were never bound to a VCI */
return;
/* 15.1.1 - set to trashing, wait one cell time (15us) */
cardvcc_write(lvcc,
RXADDR1_SET_RMMODE(RMMODE_TRASH) |
RXADDR1_SET_MODE(RXMODE_TRASH), vcc_rxaddr1);
udelay(15);
/* 15.1.2 - clear rest of entries */
cardvcc_write(lvcc, 0, vcc_rxaddr2);
cardvcc_write(lvcc, 0, vcc_rxcrc1);
cardvcc_write(lvcc, 0, vcc_rxcrc2);
cardvcc_write(lvcc, 0, vcc_rxwriteptr);
cardvcc_write(lvcc, 0, vcc_rxbufstart);
cardvcc_write(lvcc, 0, vcc_rxreadptr);
}
/* Shutdown transmitting on card.
* Unfortunately the lanai needs us to wait until all the data
* drains out of the buffer before we can dealloc it, so this
* can take awhile -- up to 370ms for a full 128KB buffer
* assuming everone else is quiet. In theory the time is
* boundless if there's a CBR VCC holding things up.
*/
static void lanai_shutdown_tx_vci(struct lanai_dev *lanai,
struct lanai_vcc *lvcc)
{
struct sk_buff *skb;
unsigned long flags, timeout;
int read, write, lastread = -1;
APRINTK(!in_interrupt(),
"lanai_shutdown_tx_vci called w/o process context!\n");
if (lvcc->vbase == NULL) /* We were never bound to a VCI */
return;
/* 15.2.1 - wait for queue to drain */
while ((skb = skb_dequeue(&lvcc->tx.backlog)) != NULL)
lanai_free_skb(lvcc->tx.atmvcc, skb);
read_lock_irqsave(&vcc_sklist_lock, flags);
__clear_bit(lvcc->vci, lanai->backlog_vccs);
read_unlock_irqrestore(&vcc_sklist_lock, flags);
/*
* We need to wait for the VCC to drain but don't wait forever. We
* give each 1K of buffer size 1/128th of a second to clear out.
* TODO: maybe disable CBR if we're about to timeout?
*/
timeout = jiffies +
(((lanai_buf_size(&lvcc->tx.buf) / 1024) * HZ) >> 7);
write = TXWRITEPTR_GET_PTR(cardvcc_read(lvcc, vcc_txwriteptr));
for (;;) {
read = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr));
if (read == write && /* Is TX buffer empty? */
(lvcc->tx.atmvcc->qos.txtp.traffic_class != ATM_CBR ||
(cardvcc_read(lvcc, vcc_txcbr_next) &
TXCBR_NEXT_BOZO) == 0))
break;
if (read != lastread) { /* Has there been any progress? */
lastread = read;
timeout += HZ / 10;
}
if (unlikely(time_after(jiffies, timeout))) {
printk(KERN_ERR DEV_LABEL "(itf %d): Timed out on "
"backlog closing vci %d\n",
lvcc->tx.atmvcc->dev->number, lvcc->vci);
DPRINTK("read, write = %d, %d\n", read, write);
break;
}
msleep(40);
}
/* 15.2.2 - clear out all tx registers */
cardvcc_write(lvcc, 0, vcc_txreadptr);
cardvcc_write(lvcc, 0, vcc_txwriteptr);
cardvcc_write(lvcc, 0, vcc_txendptr);
cardvcc_write(lvcc, 0, vcc_txcrc1);
cardvcc_write(lvcc, 0, vcc_txcrc2);
cardvcc_write(lvcc, 0, vcc_txaddr2);
cardvcc_write(lvcc, 0, vcc_txaddr1);
}
/* -------------------- MANAGING AAL0 RX BUFFER: */
static inline int aal0_buffer_allocate(struct lanai_dev *lanai)
{
DPRINTK("aal0_buffer_allocate: allocating AAL0 RX buffer\n");
lanai_buf_allocate(&lanai->aal0buf, AAL0_RX_BUFFER_SIZE, 80,
lanai->pci);
return (lanai->aal0buf.start == NULL) ? -ENOMEM : 0;
}
static inline void aal0_buffer_free(struct lanai_dev *lanai)
{
DPRINTK("aal0_buffer_allocate: freeing AAL0 RX buffer\n");
lanai_buf_deallocate(&lanai->aal0buf, lanai->pci);
}
/* -------------------- EEPROM UTILITIES: */
/* Offsets of data in the EEPROM */
#define EEPROM_COPYRIGHT (0)
#define EEPROM_COPYRIGHT_LEN (44)
#define EEPROM_CHECKSUM (62)
#define EEPROM_CHECKSUM_REV (63)
#define EEPROM_MAC (64)
#define EEPROM_MAC_REV (70)
#define EEPROM_SERIAL (112)
#define EEPROM_SERIAL_REV (116)
#define EEPROM_MAGIC (120)
#define EEPROM_MAGIC_REV (124)
#define EEPROM_MAGIC_VALUE (0x5AB478D2)
#ifndef READ_EEPROM
/* Stub functions to use if EEPROM reading is disabled */
static int eeprom_read(struct lanai_dev *lanai)
{
printk(KERN_INFO DEV_LABEL "(itf %d): *NOT* reading EEPROM\n",
lanai->number);
memset(&lanai->eeprom[EEPROM_MAC], 0, 6);
return 0;
}
static int eeprom_validate(struct lanai_dev *lanai)
{
lanai->serialno = 0;
lanai->magicno = EEPROM_MAGIC_VALUE;
return 0;
}
#else /* READ_EEPROM */
static int eeprom_read(struct lanai_dev *lanai)
{
int i, address;
u8 data;
u32 tmp;
#define set_config1(x) do { lanai->conf1 = x; conf1_write(lanai); \
} while (0)
#define clock_h() set_config1(lanai->conf1 | CONFIG1_PROMCLK)
#define clock_l() set_config1(lanai->conf1 &~ CONFIG1_PROMCLK)
#define data_h() set_config1(lanai->conf1 | CONFIG1_PROMDATA)
#define data_l() set_config1(lanai->conf1 &~ CONFIG1_PROMDATA)
#define pre_read() do { data_h(); clock_h(); udelay(5); } while (0)
#define read_pin() (reg_read(lanai, Status_Reg) & STATUS_PROMDATA)
#define send_stop() do { data_l(); udelay(5); clock_h(); udelay(5); \
data_h(); udelay(5); } while (0)
/* start with both clock and data high */
data_h(); clock_h(); udelay(5);
for (address = 0; address < LANAI_EEPROM_SIZE; address++) {
data = (address << 1) | 1; /* Command=read + address */
/* send start bit */
data_l(); udelay(5);
clock_l(); udelay(5);
for (i = 128; i != 0; i >>= 1) { /* write command out */
tmp = (lanai->conf1 & ~CONFIG1_PROMDATA) |
((data & i) ? CONFIG1_PROMDATA : 0);
if (lanai->conf1 != tmp) {
set_config1(tmp);
udelay(5); /* Let new data settle */
}
clock_h(); udelay(5); clock_l(); udelay(5);
}
/* look for ack */
data_h(); clock_h(); udelay(5);
if (read_pin() != 0)
goto error; /* No ack seen */
clock_l(); udelay(5);
/* read back result */
for (data = 0, i = 7; i >= 0; i--) {
data_h(); clock_h(); udelay(5);
data = (data << 1) | !!read_pin();
clock_l(); udelay(5);
}
/* look again for ack */
data_h(); clock_h(); udelay(5);
if (read_pin() == 0)
goto error; /* Spurious ack */
clock_l(); udelay(5);
send_stop();
lanai->eeprom[address] = data;
DPRINTK("EEPROM 0x%04X %02X\n",
(unsigned int) address, (unsigned int) data);
}
return 0;
error:
clock_l(); udelay(5); /* finish read */
send_stop();
printk(KERN_ERR DEV_LABEL "(itf %d): error reading EEPROM byte %d\n",
lanai->number, address);
return -EIO;
#undef set_config1
#undef clock_h
#undef clock_l
#undef data_h
#undef data_l
#undef pre_read
#undef read_pin
#undef send_stop
}
/* read a big-endian 4-byte value out of eeprom */
static inline u32 eeprom_be4(const struct lanai_dev *lanai, int address)
{
return be32_to_cpup((const u32 *) &lanai->eeprom[address]);
}
/* Checksum/validate EEPROM contents */
static int eeprom_validate(struct lanai_dev *lanai)
{
int i, s;
u32 v;
const u8 *e = lanai->eeprom;
#ifdef DEBUG
/* First, see if we can get an ASCIIZ string out of the copyright */
for (i = EEPROM_COPYRIGHT;
i < (EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN); i++)
if (e[i] < 0x20 || e[i] > 0x7E)
break;
if ( i != EEPROM_COPYRIGHT &&
i != EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN && e[i] == '\0')
DPRINTK("eeprom: copyright = \"%s\"\n",
(char *) &e[EEPROM_COPYRIGHT]);
else
DPRINTK("eeprom: copyright not found\n");
#endif
/* Validate checksum */
for (i = s = 0; i < EEPROM_CHECKSUM; i++)
s += e[i];
s &= 0xFF;
if (s != e[EEPROM_CHECKSUM]) {
printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM checksum bad "
"(wanted 0x%02X, got 0x%02X)\n", lanai->number,
(unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM]);
return -EIO;
}
s ^= 0xFF;
if (s != e[EEPROM_CHECKSUM_REV]) {
printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM inverse checksum "
"bad (wanted 0x%02X, got 0x%02X)\n", lanai->number,
(unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM_REV]);
return -EIO;
}
/* Verify MAC address */
for (i = 0; i < 6; i++)
if ((e[EEPROM_MAC + i] ^ e[EEPROM_MAC_REV + i]) != 0xFF) {
printk(KERN_ERR DEV_LABEL
"(itf %d) : EEPROM MAC addresses don't match "
"(0x%02X, inverse 0x%02X)\n", lanai->number,
(unsigned int) e[EEPROM_MAC + i],
(unsigned int) e[EEPROM_MAC_REV + i]);
return -EIO;
}
DPRINTK("eeprom: MAC address = %pM\n", &e[EEPROM_MAC]);
/* Verify serial number */
lanai->serialno = eeprom_be4(lanai, EEPROM_SERIAL);
v = eeprom_be4(lanai, EEPROM_SERIAL_REV);
if ((lanai->serialno ^ v) != 0xFFFFFFFF) {
printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM serial numbers "
"don't match (0x%08X, inverse 0x%08X)\n", lanai->number,
(unsigned int) lanai->serialno, (unsigned int) v);
return -EIO;
}
DPRINTK("eeprom: Serial number = %d\n", (unsigned int) lanai->serialno);
/* Verify magic number */
lanai->magicno = eeprom_be4(lanai, EEPROM_MAGIC);
v = eeprom_be4(lanai, EEPROM_MAGIC_REV);
if ((lanai->magicno ^ v) != 0xFFFFFFFF) {
printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM magic numbers "
"don't match (0x%08X, inverse 0x%08X)\n", lanai->number,
lanai->magicno, v);
return -EIO;
}
DPRINTK("eeprom: Magic number = 0x%08X\n", lanai->magicno);
if (lanai->magicno != EEPROM_MAGIC_VALUE)
printk(KERN_WARNING DEV_LABEL "(itf %d): warning - EEPROM "
"magic not what expected (got 0x%08X, not 0x%08X)\n",
lanai->number, (unsigned int) lanai->magicno,
(unsigned int) EEPROM_MAGIC_VALUE);
return 0;
}
#endif /* READ_EEPROM */
static inline const u8 *eeprom_mac(const struct lanai_dev *lanai)
{
return &lanai->eeprom[EEPROM_MAC];
}
/* -------------------- INTERRUPT HANDLING UTILITIES: */
/* Interrupt types */
#define INT_STATS (0x00000002) /* Statistics counter overflow */
#define INT_SOOL (0x00000004) /* SOOL changed state */
#define INT_LOCD (0x00000008) /* LOCD changed state */
#define INT_LED (0x00000010) /* LED (HAPPI) changed state */
#define INT_GPIN (0x00000020) /* GPIN changed state */
#define INT_PING (0x00000040) /* PING_COUNT fulfilled */
#define INT_WAKE (0x00000080) /* Lanai wants bus */
#define INT_CBR0 (0x00000100) /* CBR sched hit VCI 0 */
#define INT_LOCK (0x00000200) /* Service list overflow */
#define INT_MISMATCH (0x00000400) /* TX magic list mismatch */
#define INT_AAL0_STR (0x00000800) /* Non-AAL5 buffer half filled */
#define INT_AAL0 (0x00001000) /* Non-AAL5 data available */
#define INT_SERVICE (0x00002000) /* Service list entries available */
#define INT_TABORTSENT (0x00004000) /* Target abort sent by lanai */
#define INT_TABORTBM (0x00008000) /* Abort rcv'd as bus master */
#define INT_TIMEOUTBM (0x00010000) /* No response to bus master */
#define INT_PCIPARITY (0x00020000) /* Parity error on PCI */
/* Sets of the above */
#define INT_ALL (0x0003FFFE) /* All interrupts */
#define INT_STATUS (0x0000003C) /* Some status pin changed */
#define INT_DMASHUT (0x00038000) /* DMA engine got shut down */
#define INT_SEGSHUT (0x00000700) /* Segmentation got shut down */
static inline u32 intr_pending(const struct lanai_dev *lanai)
{
return reg_read(lanai, IntStatusMasked_Reg);
}
static inline void intr_enable(const struct lanai_dev *lanai, u32 i)
{
reg_write(lanai, i, IntControlEna_Reg);
}
static inline void intr_disable(const struct lanai_dev *lanai, u32 i)
{
reg_write(lanai, i, IntControlDis_Reg);
}
/* -------------------- CARD/PCI STATUS: */
static void status_message(int itf, const char *name, int status)
{
static const char *onoff[2] = { "off to on", "on to off" };
printk(KERN_INFO DEV_LABEL "(itf %d): %s changed from %s\n",
itf, name, onoff[!status]);
}
static void lanai_check_status(struct lanai_dev *lanai)
{
u32 new = reg_read(lanai, Status_Reg);
u32 changes = new ^ lanai->status;
lanai->status = new;
#define e(flag, name) \
if (changes & flag) \
status_message(lanai->number, name, new & flag)
e(STATUS_SOOL, "SOOL");
e(STATUS_LOCD, "LOCD");
e(STATUS_LED, "LED");
e(STATUS_GPIN, "GPIN");
#undef e
}
static void pcistatus_got(int itf, const char *name)
{
printk(KERN_INFO DEV_LABEL "(itf %d): PCI got %s error\n", itf, name);
}
static void pcistatus_check(struct lanai_dev *lanai, int clearonly)
{
u16 s;
int result;
result = pci_read_config_word(lanai->pci, PCI_STATUS, &s);
if (result != PCIBIOS_SUCCESSFUL) {
printk(KERN_ERR DEV_LABEL "(itf %d): can't read PCI_STATUS: "
"%d\n", lanai->number, result);
return;
}
s &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR |
PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_PARITY;
if (s == 0)
return;
result = pci_write_config_word(lanai->pci, PCI_STATUS, s);
if (result != PCIBIOS_SUCCESSFUL)
printk(KERN_ERR DEV_LABEL "(itf %d): can't write PCI_STATUS: "
"%d\n", lanai->number, result);
if (clearonly)
return;
#define e(flag, name, stat) \
if (s & flag) { \
pcistatus_got(lanai->number, name); \
++lanai->stats.pcierr_##stat; \
}
e(PCI_STATUS_DETECTED_PARITY, "parity", parity_detect);
e(PCI_STATUS_SIG_SYSTEM_ERROR, "signalled system", serr_set);
e(PCI_STATUS_REC_MASTER_ABORT, "master", master_abort);
e(PCI_STATUS_REC_TARGET_ABORT, "master target", m_target_abort);
e(PCI_STATUS_SIG_TARGET_ABORT, "slave", s_target_abort);
e(PCI_STATUS_PARITY, "master parity", master_parity);
#undef e
}
/* -------------------- VCC TX BUFFER UTILITIES: */
/* space left in tx buffer in bytes */
static inline int vcc_tx_space(const struct lanai_vcc *lvcc, int endptr)
{
int r;
r = endptr * 16;
r -= ((unsigned long) lvcc->tx.buf.ptr) -
((unsigned long) lvcc->tx.buf.start);
r -= 16; /* Leave "bubble" - if start==end it looks empty */
if (r < 0)
r += lanai_buf_size(&lvcc->tx.buf);
return r;
}
/* test if VCC is currently backlogged */
static inline int vcc_is_backlogged(const struct lanai_vcc *lvcc)
{
return !skb_queue_empty(&lvcc->tx.backlog);
}
/* Bit fields in the segmentation buffer descriptor */
#define DESCRIPTOR_MAGIC (0xD0000000)
#define DESCRIPTOR_AAL5 (0x00008000)
#define DESCRIPTOR_AAL5_STREAM (0x00004000)
#define DESCRIPTOR_CLP (0x00002000)
/* Add 32-bit descriptor with its padding */
static inline void vcc_tx_add_aal5_descriptor(struct lanai_vcc *lvcc,
u32 flags, int len)
{
int pos;
APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 0,
"vcc_tx_add_aal5_descriptor: bad ptr=%p\n", lvcc->tx.buf.ptr);
lvcc->tx.buf.ptr += 4; /* Hope the values REALLY don't matter */
pos = ((unsigned char *) lvcc->tx.buf.ptr) -
(unsigned char *) lvcc->tx.buf.start;
APRINTK((pos & ~0x0001FFF0) == 0,
"vcc_tx_add_aal5_descriptor: bad pos (%d) before, vci=%d, "
"start,ptr,end=%p,%p,%p\n", pos, lvcc->vci,
lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end);
pos = (pos + len) & (lanai_buf_size(&lvcc->tx.buf) - 1);
APRINTK((pos & ~0x0001FFF0) == 0,
"vcc_tx_add_aal5_descriptor: bad pos (%d) after, vci=%d, "
"start,ptr,end=%p,%p,%p\n", pos, lvcc->vci,
lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end);
lvcc->tx.buf.ptr[-1] =
cpu_to_le32(DESCRIPTOR_MAGIC | DESCRIPTOR_AAL5 |
((lvcc->tx.atmvcc->atm_options & ATM_ATMOPT_CLP) ?
DESCRIPTOR_CLP : 0) | flags | pos >> 4);
if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end)
lvcc->tx.buf.ptr = lvcc->tx.buf.start;
}
/* Add 32-bit AAL5 trailer and leave room for its CRC */
static inline void vcc_tx_add_aal5_trailer(struct lanai_vcc *lvcc,
int len, int cpi, int uu)
{
APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 8,
"vcc_tx_add_aal5_trailer: bad ptr=%p\n", lvcc->tx.buf.ptr);
lvcc->tx.buf.ptr += 2;
lvcc->tx.buf.ptr[-2] = cpu_to_be32((uu << 24) | (cpi << 16) | len);
if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end)
lvcc->tx.buf.ptr = lvcc->tx.buf.start;
}
static inline void vcc_tx_memcpy(struct lanai_vcc *lvcc,
const unsigned char *src, int n)
{
unsigned char *e;
int m;
e = ((unsigned char *) lvcc->tx.buf.ptr) + n;
m = e - (unsigned char *) lvcc->tx.buf.end;
if (m < 0)
m = 0;
memcpy(lvcc->tx.buf.ptr, src, n - m);
if (m != 0) {
memcpy(lvcc->tx.buf.start, src + n - m, m);
e = ((unsigned char *) lvcc->tx.buf.start) + m;
}
lvcc->tx.buf.ptr = (u32 *) e;
}
static inline void vcc_tx_memzero(struct lanai_vcc *lvcc, int n)
{
unsigned char *e;
int m;
if (n == 0)
return;
e = ((unsigned char *) lvcc->tx.buf.ptr) + n;
m = e - (unsigned char *) lvcc->tx.buf.end;
if (m < 0)
m = 0;
memset(lvcc->tx.buf.ptr, 0, n - m);
if (m != 0) {
memset(lvcc->tx.buf.start, 0, m);
e = ((unsigned char *) lvcc->tx.buf.start) + m;
}
lvcc->tx.buf.ptr = (u32 *) e;
}
/* Update "butt" register to specify new WritePtr */
static inline void lanai_endtx(struct lanai_dev *lanai,
const struct lanai_vcc *lvcc)
{
int i, ptr = ((unsigned char *) lvcc->tx.buf.ptr) -
(unsigned char *) lvcc->tx.buf.start;
APRINTK((ptr & ~0x0001FFF0) == 0,
"lanai_endtx: bad ptr (%d), vci=%d, start,ptr,end=%p,%p,%p\n",
ptr, lvcc->vci, lvcc->tx.buf.start, lvcc->tx.buf.ptr,
lvcc->tx.buf.end);
/*
* Since the "butt register" is a shared resounce on the card we
* serialize all accesses to it through this spinlock. This is
* mostly just paranoia since the register is rarely "busy" anyway
* but is needed for correctness.
*/
spin_lock(&lanai->endtxlock);
/*
* We need to check if the "butt busy" bit is set before
* updating the butt register. In theory this should
* never happen because the ATM card is plenty fast at
* updating the register. Still, we should make sure
*/
for (i = 0; reg_read(lanai, Status_Reg) & STATUS_BUTTBUSY; i++) {
if (unlikely(i > 50)) {
printk(KERN_ERR DEV_LABEL "(itf %d): butt register "
"always busy!\n", lanai->number);
break;
}
udelay(5);
}
/*
* Before we tall the card to start work we need to be sure 100% of
* the info in the service buffer has been written before we tell
* the card about it
*/
wmb();
reg_write(lanai, (ptr << 12) | lvcc->vci, Butt_Reg);
spin_unlock(&lanai->endtxlock);
}
/*
* Add one AAL5 PDU to lvcc's transmit buffer. Caller garauntees there's
* space available. "pdusize" is the number of bytes the PDU will take
*/
static void lanai_send_one_aal5(struct lanai_dev *lanai,
struct lanai_vcc *lvcc, struct sk_buff *skb, int pdusize)
{
int pad;
APRINTK(pdusize == aal5_size(skb->len),
"lanai_send_one_aal5: wrong size packet (%d != %d)\n",
pdusize, aal5_size(skb->len));
vcc_tx_add_aal5_descriptor(lvcc, 0, pdusize);
pad = pdusize - skb->len - 8;
APRINTK(pad >= 0, "pad is negative (%d)\n", pad);
APRINTK(pad < 48, "pad is too big (%d)\n", pad);
vcc_tx_memcpy(lvcc, skb->data, skb->len);
vcc_tx_memzero(lvcc, pad);
vcc_tx_add_aal5_trailer(lvcc, skb->len, 0, 0);
lanai_endtx(lanai, lvcc);
lanai_free_skb(lvcc->tx.atmvcc, skb);
atomic_inc(&lvcc->tx.atmvcc->stats->tx);
}
/* Try to fill the buffer - don't call unless there is backlog */
static void vcc_tx_unqueue_aal5(struct lanai_dev *lanai,
struct lanai_vcc *lvcc, int endptr)
{
int n;
struct sk_buff *skb;
int space = vcc_tx_space(lvcc, endptr);
APRINTK(vcc_is_backlogged(lvcc),
"vcc_tx_unqueue() called with empty backlog (vci=%d)\n",
lvcc->vci);
while (space >= 64) {
skb = skb_dequeue(&lvcc->tx.backlog);
if (skb == NULL)
goto no_backlog;
n = aal5_size(skb->len);
if (n + 16 > space) {
/* No room for this packet - put it back on queue */
skb_queue_head(&lvcc->tx.backlog, skb);
return;
}
lanai_send_one_aal5(lanai, lvcc, skb, n);
space -= n + 16;
}
if (!vcc_is_backlogged(lvcc)) {
no_backlog:
__clear_bit(lvcc->vci, lanai->backlog_vccs);
}
}
/* Given an skb that we want to transmit either send it now or queue */
static void vcc_tx_aal5(struct lanai_dev *lanai, struct lanai_vcc *lvcc,
struct sk_buff *skb)
{
int space, n;
if (vcc_is_backlogged(lvcc)) /* Already backlogged */
goto queue_it;
space = vcc_tx_space(lvcc,
TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr)));
n = aal5_size(skb->len);
APRINTK(n + 16 >= 64, "vcc_tx_aal5: n too small (%d)\n", n);
if (space < n + 16) { /* No space for this PDU */
__set_bit(lvcc->vci, lanai->backlog_vccs);
queue_it:
skb_queue_tail(&lvcc->tx.backlog, skb);
return;
}
lanai_send_one_aal5(lanai, lvcc, skb, n);
}
static void vcc_tx_unqueue_aal0(struct lanai_dev *lanai,
struct lanai_vcc *lvcc, int endptr)
{
printk(KERN_INFO DEV_LABEL
": vcc_tx_unqueue_aal0: not implemented\n");
}
static void vcc_tx_aal0(struct lanai_dev *lanai, struct lanai_vcc *lvcc,
struct sk_buff *skb)
{
printk(KERN_INFO DEV_LABEL ": vcc_tx_aal0: not implemented\n");
/* Remember to increment lvcc->tx.atmvcc->stats->tx */
lanai_free_skb(lvcc->tx.atmvcc, skb);
}
/* -------------------- VCC RX BUFFER UTILITIES: */
/* unlike the _tx_ cousins, this doesn't update ptr */
static inline void vcc_rx_memcpy(unsigned char *dest,
const struct lanai_vcc *lvcc, int n)
{
int m = ((const unsigned char *) lvcc->rx.buf.ptr) + n -
((const unsigned char *) (lvcc->rx.buf.end));
if (m < 0)
m = 0;
memcpy(dest, lvcc->rx.buf.ptr, n - m);
memcpy(dest + n - m, lvcc->rx.buf.start, m);
/* Make sure that these copies don't get reordered */
barrier();
}
/* Receive AAL5 data on a VCC with a particular endptr */
static void vcc_rx_aal5(struct lanai_vcc *lvcc, int endptr)
{
int size;
struct sk_buff *skb;
const u32 *x;
u32 *end = &lvcc->rx.buf.start[endptr * 4];
int n = ((unsigned long) end) - ((unsigned long) lvcc->rx.buf.ptr);
if (n < 0)
n += lanai_buf_size(&lvcc->rx.buf);
APRINTK(n >= 0 && n < lanai_buf_size(&lvcc->rx.buf) && !(n & 15),
"vcc_rx_aal5: n out of range (%d/%zu)\n",
n, lanai_buf_size(&lvcc->rx.buf));
/* Recover the second-to-last word to get true pdu length */
if ((x = &end[-2]) < lvcc->rx.buf.start)
x = &lvcc->rx.buf.end[-2];
/*
* Before we actually read from the buffer, make sure the memory
* changes have arrived
*/
rmb();
size = be32_to_cpup(x) & 0xffff;
if (unlikely(n != aal5_size(size))) {
/* Make sure size matches padding */
printk(KERN_INFO DEV_LABEL "(itf %d): Got bad AAL5 length "
"on vci=%d - size=%d n=%d\n",
lvcc->rx.atmvcc->dev->number, lvcc->vci, size, n);
lvcc->stats.x.aal5.rx_badlen++;
goto out;
}
skb = atm_alloc_charge(lvcc->rx.atmvcc, size, GFP_ATOMIC);
if (unlikely(skb == NULL)) {
lvcc->stats.rx_nomem++;
goto out;
}
skb_put(skb, size);
vcc_rx_memcpy(skb->data, lvcc, size);
ATM_SKB(skb)->vcc = lvcc->rx.atmvcc;
__net_timestamp(skb);
lvcc->rx.atmvcc->push(lvcc->rx.atmvcc, skb);
atomic_inc(&lvcc->rx.atmvcc->stats->rx);
out:
lvcc->rx.buf.ptr = end;
cardvcc_write(lvcc, endptr, vcc_rxreadptr);
}
static void vcc_rx_aal0(struct lanai_dev *lanai)
{
printk(KERN_INFO DEV_LABEL ": vcc_rx_aal0: not implemented\n");
/* Remember to get read_lock(&vcc_sklist_lock) while looking up VC */
/* Remember to increment lvcc->rx.atmvcc->stats->rx */
}
/* -------------------- MANAGING HOST-BASED VCC TABLE: */
/* Decide whether to use vmalloc or get_zeroed_page for VCC table */
#if (NUM_VCI * BITS_PER_LONG) <= PAGE_SIZE
#define VCCTABLE_GETFREEPAGE
#else
#include <linux/vmalloc.h>
#endif
static int vcc_table_allocate(struct lanai_dev *lanai)
{
#ifdef VCCTABLE_GETFREEPAGE
APRINTK((lanai->num_vci) * sizeof(struct lanai_vcc *) <= PAGE_SIZE,
"vcc table > PAGE_SIZE!");
lanai->vccs = (struct lanai_vcc **) get_zeroed_page(GFP_KERNEL);
return (lanai->vccs == NULL) ? -ENOMEM : 0;
#else
int bytes = (lanai->num_vci) * sizeof(struct lanai_vcc *);
lanai->vccs = vzalloc(bytes);
if (unlikely(lanai->vccs == NULL))
return -ENOMEM;
return 0;
#endif
}
static inline void vcc_table_deallocate(const struct lanai_dev *lanai)
{
#ifdef VCCTABLE_GETFREEPAGE
free_page((unsigned long) lanai->vccs);
#else
vfree(lanai->vccs);
#endif
}
/* Allocate a fresh lanai_vcc, with the appropriate things cleared */
static inline struct lanai_vcc *new_lanai_vcc(void)
{
struct lanai_vcc *lvcc;
lvcc = kzalloc(sizeof(*lvcc), GFP_KERNEL);
if (likely(lvcc != NULL)) {
skb_queue_head_init(&lvcc->tx.backlog);
#ifdef DEBUG
lvcc->vci = -1;
#endif
}
return lvcc;
}
static int lanai_get_sized_buffer(struct lanai_dev *lanai,
struct lanai_buffer *buf, int max_sdu, int multiplier,
const char *name)
{
int size;
if (unlikely(max_sdu < 1))
max_sdu = 1;
max_sdu = aal5_size(max_sdu);
size = (max_sdu + 16) * multiplier + 16;
lanai_buf_allocate(buf, size, max_sdu + 32, lanai->pci);
if (unlikely(buf->start == NULL))
return -ENOMEM;
if (unlikely(lanai_buf_size(buf) < size))
printk(KERN_WARNING DEV_LABEL "(itf %d): wanted %d bytes "
"for %s buffer, got only %zu\n", lanai->number, size,
name, lanai_buf_size(buf));
DPRINTK("Allocated %zu byte %s buffer\n", lanai_buf_size(buf), name);
return 0;
}
/* Setup a RX buffer for a currently unbound AAL5 vci */
static inline int lanai_setup_rx_vci_aal5(struct lanai_dev *lanai,
struct lanai_vcc *lvcc, const struct atm_qos *qos)
{
return lanai_get_sized_buffer(lanai, &lvcc->rx.buf,
qos->rxtp.max_sdu, AAL5_RX_MULTIPLIER, "RX");
}
/* Setup a TX buffer for a currently unbound AAL5 vci */
static int lanai_setup_tx_vci(struct lanai_dev *lanai, struct lanai_vcc *lvcc,
const struct atm_qos *qos)
{
int max_sdu, multiplier;
if (qos->aal == ATM_AAL0) {
lvcc->tx.unqueue = vcc_tx_unqueue_aal0;
max_sdu = ATM_CELL_SIZE - 1;
multiplier = AAL0_TX_MULTIPLIER;
} else {
lvcc->tx.unqueue = vcc_tx_unqueue_aal5;
max_sdu = qos->txtp.max_sdu;
multiplier = AAL5_TX_MULTIPLIER;
}
return lanai_get_sized_buffer(lanai, &lvcc->tx.buf, max_sdu,
multiplier, "TX");
}
static inline void host_vcc_bind(struct lanai_dev *lanai,
struct lanai_vcc *lvcc, vci_t vci)
{
if (lvcc->vbase != NULL)
return; /* We already were bound in the other direction */
DPRINTK("Binding vci %d\n", vci);
#ifdef USE_POWERDOWN
if (lanai->nbound++ == 0) {
DPRINTK("Coming out of powerdown\n");
lanai->conf1 &= ~CONFIG1_POWERDOWN;
conf1_write(lanai);
conf2_write(lanai);
}
#endif
lvcc->vbase = cardvcc_addr(lanai, vci);
lanai->vccs[lvcc->vci = vci] = lvcc;
}
static inline void host_vcc_unbind(struct lanai_dev *lanai,
struct lanai_vcc *lvcc)
{
if (lvcc->vbase == NULL)
return; /* This vcc was never bound */
DPRINTK("Unbinding vci %d\n", lvcc->vci);
lvcc->vbase = NULL;
lanai->vccs[lvcc->vci] = NULL;
#ifdef USE_POWERDOWN
if (--lanai->nbound == 0) {
DPRINTK("Going into powerdown\n");
lanai->conf1 |= CONFIG1_POWERDOWN;
conf1_write(lanai);
}
#endif
}
/* -------------------- RESET CARD: */
static void lanai_reset(struct lanai_dev *lanai)
{
printk(KERN_CRIT DEV_LABEL "(itf %d): *NOT* resetting - not "
"implemented\n", lanai->number);
/* TODO */
/* The following is just a hack until we write the real
* resetter - at least ack whatever interrupt sent us
* here
*/
reg_write(lanai, INT_ALL, IntAck_Reg);
lanai->stats.card_reset++;
}
/* -------------------- SERVICE LIST UTILITIES: */
/*
* Allocate service buffer and tell card about it
*/
static int service_buffer_allocate(struct lanai_dev *lanai)
{
lanai_buf_allocate(&lanai->service, SERVICE_ENTRIES * 4, 8,
lanai->pci);
if (unlikely(lanai->service.start == NULL))
return -ENOMEM;
DPRINTK("allocated service buffer at %p, size %zu(%d)\n",
lanai->service.start,
lanai_buf_size(&lanai->service),
lanai_buf_size_cardorder(&lanai->service));
/* Clear ServWrite register to be safe */
reg_write(lanai, 0, ServWrite_Reg);
/* ServiceStuff register contains size and address of buffer */
reg_write(lanai,
SSTUFF_SET_SIZE(lanai_buf_size_cardorder(&lanai->service)) |
SSTUFF_SET_ADDR(lanai->service.dmaaddr),
ServiceStuff_Reg);
return 0;
}
static inline void service_buffer_deallocate(struct lanai_dev *lanai)
{
lanai_buf_deallocate(&lanai->service, lanai->pci);
}
/* Bitfields in service list */
#define SERVICE_TX (0x80000000) /* Was from transmission */
#define SERVICE_TRASH (0x40000000) /* RXed PDU was trashed */
#define SERVICE_CRCERR (0x20000000) /* RXed PDU had CRC error */
#define SERVICE_CI (0x10000000) /* RXed PDU had CI set */
#define SERVICE_CLP (0x08000000) /* RXed PDU had CLP set */
#define SERVICE_STREAM (0x04000000) /* RX Stream mode */
#define SERVICE_GET_VCI(x) (((x)>>16)&0x3FF)
#define SERVICE_GET_END(x) ((x)&0x1FFF)
/* Handle one thing from the service list - returns true if it marked a
* VCC ready for xmit
*/
static int handle_service(struct lanai_dev *lanai, u32 s)
{
vci_t vci = SERVICE_GET_VCI(s);
struct lanai_vcc *lvcc;
read_lock(&vcc_sklist_lock);
lvcc = lanai->vccs[vci];
if (unlikely(lvcc == NULL)) {
read_unlock(&vcc_sklist_lock);
DPRINTK("(itf %d) got service entry 0x%X for nonexistent "
"vcc %d\n", lanai->number, (unsigned int) s, vci);
if (s & SERVICE_TX)
lanai->stats.service_notx++;
else
lanai->stats.service_norx++;
return 0;
}
if (s & SERVICE_TX) { /* segmentation interrupt */
if (unlikely(lvcc->tx.atmvcc == NULL)) {
read_unlock(&vcc_sklist_lock);
DPRINTK("(itf %d) got service entry 0x%X for non-TX "
"vcc %d\n", lanai->number, (unsigned int) s, vci);
lanai->stats.service_notx++;
return 0;
}
__set_bit(vci, lanai->transmit_ready);
lvcc->tx.endptr = SERVICE_GET_END(s);
read_unlock(&vcc_sklist_lock);
return 1;
}
if (unlikely(lvcc->rx.atmvcc == NULL)) {
read_unlock(&vcc_sklist_lock);
DPRINTK("(itf %d) got service entry 0x%X for non-RX "
"vcc %d\n", lanai->number, (unsigned int) s, vci);
lanai->stats.service_norx++;
return 0;
}
if (unlikely(lvcc->rx.atmvcc->qos.aal != ATM_AAL5)) {
read_unlock(&vcc_sklist_lock);
DPRINTK("(itf %d) got RX service entry 0x%X for non-AAL5 "
"vcc %d\n", lanai->number, (unsigned int) s, vci);
lanai->stats.service_rxnotaal5++;
atomic_inc(&lvcc->rx.atmvcc->stats->rx_err);
return 0;
}
if (likely(!(s & (SERVICE_TRASH | SERVICE_STREAM | SERVICE_CRCERR)))) {
vcc_rx_aal5(lvcc, SERVICE_GET_END(s));
read_unlock(&vcc_sklist_lock);
return 0;
}
if (s & SERVICE_TRASH) {
int bytes;
read_unlock(&vcc_sklist_lock);
DPRINTK("got trashed rx pdu on vci %d\n", vci);
atomic_inc(&lvcc->rx.atmvcc->stats->rx_err);
lvcc->stats.x.aal5.service_trash++;
bytes = (SERVICE_GET_END(s) * 16) -
(((unsigned long) lvcc->rx.buf.ptr) -
((unsigned long) lvcc->rx.buf.start)) + 47;
if (bytes < 0)
bytes += lanai_buf_size(&lvcc->rx.buf);
lanai->stats.ovfl_trash += (bytes / 48);
return 0;
}
if (s & SERVICE_STREAM) {
read_unlock(&vcc_sklist_lock);
atomic_inc(&lvcc->rx.atmvcc->stats->rx_err);
lvcc->stats.x.aal5.service_stream++;
printk(KERN_ERR DEV_LABEL "(itf %d): Got AAL5 stream "
"PDU on VCI %d!\n", lanai->number, vci);
lanai_reset(lanai);
return 0;
}
DPRINTK("got rx crc error on vci %d\n", vci);
atomic_inc(&lvcc->rx.atmvcc->stats->rx_err);
lvcc->stats.x.aal5.service_rxcrc++;
lvcc->rx.buf.ptr = &lvcc->rx.buf.start[SERVICE_GET_END(s) * 4];
cardvcc_write(lvcc, SERVICE_GET_END(s), vcc_rxreadptr);
read_unlock(&vcc_sklist_lock);
return 0;
}
/* Try transmitting on all VCIs that we marked ready to serve */
static void iter_transmit(struct lanai_dev *lanai, vci_t vci)
{
struct lanai_vcc *lvcc = lanai->vccs[vci];
if (vcc_is_backlogged(lvcc))
lvcc->tx.unqueue(lanai, lvcc, lvcc->tx.endptr);
}
/* Run service queue -- called from interrupt context or with
* interrupts otherwise disabled and with the lanai->servicelock
* lock held
*/
static void run_service(struct lanai_dev *lanai)
{
int ntx = 0;
u32 wreg = reg_read(lanai, ServWrite_Reg);
const u32 *end = lanai->service.start + wreg;
while (lanai->service.ptr != end) {
ntx += handle_service(lanai,
le32_to_cpup(lanai->service.ptr++));
if (lanai->service.ptr >= lanai->service.end)
lanai->service.ptr = lanai->service.start;
}
reg_write(lanai, wreg, ServRead_Reg);
if (ntx != 0) {
read_lock(&vcc_sklist_lock);
vci_bitfield_iterate(lanai, lanai->transmit_ready,
iter_transmit);
bitmap_zero(lanai->transmit_ready, NUM_VCI);
read_unlock(&vcc_sklist_lock);
}
}
/* -------------------- GATHER STATISTICS: */
static void get_statistics(struct lanai_dev *lanai)
{
u32 statreg = reg_read(lanai, Statistics_Reg);
lanai->stats.atm_ovfl += STATS_GET_FIFO_OVFL(statreg);
lanai->stats.hec_err += STATS_GET_HEC_ERR(statreg);
lanai->stats.vci_trash += STATS_GET_BAD_VCI(statreg);
lanai->stats.ovfl_trash += STATS_GET_BUF_OVFL(statreg);
}
/* -------------------- POLLING TIMER: */
#ifndef DEBUG_RW
/* Try to undequeue 1 backlogged vcc */
static void iter_dequeue(struct lanai_dev *lanai, vci_t vci)
{
struct lanai_vcc *lvcc = lanai->vccs[vci];
int endptr;
if (lvcc == NULL || lvcc->tx.atmvcc == NULL ||
!vcc_is_backlogged(lvcc)) {
__clear_bit(vci, lanai->backlog_vccs);
return;
}
endptr = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr));
lvcc->tx.unqueue(lanai, lvcc, endptr);
}
#endif /* !DEBUG_RW */
static void lanai_timed_poll(struct timer_list *t)
{
struct lanai_dev *lanai = from_timer(lanai, t, timer);
#ifndef DEBUG_RW
unsigned long flags;
#ifdef USE_POWERDOWN
if (lanai->conf1 & CONFIG1_POWERDOWN)
return;
#endif /* USE_POWERDOWN */
local_irq_save(flags);
/* If we can grab the spinlock, check if any services need to be run */
if (spin_trylock(&lanai->servicelock)) {
run_service(lanai);
spin_unlock(&lanai->servicelock);
}
/* ...and see if any backlogged VCs can make progress */
/* unfortunately linux has no read_trylock() currently */
read_lock(&vcc_sklist_lock);
vci_bitfield_iterate(lanai, lanai->backlog_vccs, iter_dequeue);
read_unlock(&vcc_sklist_lock);
local_irq_restore(flags);
get_statistics(lanai);
#endif /* !DEBUG_RW */
mod_timer(&lanai->timer, jiffies + LANAI_POLL_PERIOD);
}
static inline void lanai_timed_poll_start(struct lanai_dev *lanai)
{
timer_setup(&lanai->timer, lanai_timed_poll, 0);
lanai->timer.expires = jiffies + LANAI_POLL_PERIOD;
add_timer(&lanai->timer);
}
static inline void lanai_timed_poll_stop(struct lanai_dev *lanai)
{
del_timer_sync(&lanai->timer);
}
/* -------------------- INTERRUPT SERVICE: */
static inline void lanai_int_1(struct lanai_dev *lanai, u32 reason)
{
u32 ack = 0;
if (reason & INT_SERVICE) {
ack = INT_SERVICE;
spin_lock(&lanai->servicelock);
run_service(lanai);
spin_unlock(&lanai->servicelock);
}
if (reason & (INT_AAL0_STR | INT_AAL0)) {
ack |= reason & (INT_AAL0_STR | INT_AAL0);
vcc_rx_aal0(lanai);
}
/* The rest of the interrupts are pretty rare */
if (ack == reason)
goto done;
if (reason & INT_STATS) {
reason &= ~INT_STATS; /* No need to ack */
get_statistics(lanai);
}
if (reason & INT_STATUS) {
ack |= reason & INT_STATUS;
lanai_check_status(lanai);
}
if (unlikely(reason & INT_DMASHUT)) {
printk(KERN_ERR DEV_LABEL "(itf %d): driver error - DMA "
"shutdown, reason=0x%08X, address=0x%08X\n",
lanai->number, (unsigned int) (reason & INT_DMASHUT),
(unsigned int) reg_read(lanai, DMA_Addr_Reg));
if (reason & INT_TABORTBM) {
lanai_reset(lanai);
return;
}
ack |= (reason & INT_DMASHUT);
printk(KERN_ERR DEV_LABEL "(itf %d): re-enabling DMA\n",
lanai->number);
conf1_write(lanai);
lanai->stats.dma_reenable++;
pcistatus_check(lanai, 0);
}
if (unlikely(reason & INT_TABORTSENT)) {
ack |= (reason & INT_TABORTSENT);
printk(KERN_ERR DEV_LABEL "(itf %d): sent PCI target abort\n",
lanai->number);
pcistatus_check(lanai, 0);
}
if (unlikely(reason & INT_SEGSHUT)) {
printk(KERN_ERR DEV_LABEL "(itf %d): driver error - "
"segmentation shutdown, reason=0x%08X\n", lanai->number,
(unsigned int) (reason & INT_SEGSHUT));
lanai_reset(lanai);
return;
}
if (unlikely(reason & (INT_PING | INT_WAKE))) {
printk(KERN_ERR DEV_LABEL "(itf %d): driver error - "
"unexpected interrupt 0x%08X, resetting\n",
lanai->number,
(unsigned int) (reason & (INT_PING | INT_WAKE)));
lanai_reset(lanai);
return;
}
#ifdef DEBUG
if (unlikely(ack != reason)) {
DPRINTK("unacked ints: 0x%08X\n",
(unsigned int) (reason & ~ack));
ack = reason;
}
#endif
done:
if (ack != 0)
reg_write(lanai, ack, IntAck_Reg);
}
static irqreturn_t lanai_int(int irq, void *devid)
{
struct lanai_dev *lanai = devid;
u32 reason;
#ifdef USE_POWERDOWN
/*
* If we're powered down we shouldn't be generating any interrupts -
* so assume that this is a shared interrupt line and it's for someone
* else
*/
if (unlikely(lanai->conf1 & CONFIG1_POWERDOWN))
return IRQ_NONE;
#endif
reason = intr_pending(lanai);
if (reason == 0)
return IRQ_NONE; /* Must be for someone else */
do {
if (unlikely(reason == 0xFFFFFFFF))
break; /* Maybe we've been unplugged? */
lanai_int_1(lanai, reason);
reason = intr_pending(lanai);
} while (reason != 0);
return IRQ_HANDLED;
}
/* TODO - it would be nice if we could use the "delayed interrupt" system
* to some advantage
*/
/* -------------------- CHECK BOARD ID/REV: */
/*
* The board id and revision are stored both in the reset register and
* in the PCI configuration space - the documentation says to check
* each of them. If revp!=NULL we store the revision there
*/
static int check_board_id_and_rev(const char *name, u32 val, int *revp)
{
DPRINTK("%s says board_id=%d, board_rev=%d\n", name,
(int) RESET_GET_BOARD_ID(val),
(int) RESET_GET_BOARD_REV(val));
if (RESET_GET_BOARD_ID(val) != BOARD_ID_LANAI256) {
printk(KERN_ERR DEV_LABEL ": Found %s board-id %d -- not a "
"Lanai 25.6\n", name, (int) RESET_GET_BOARD_ID(val));
return -ENODEV;
}
if (revp != NULL)
*revp = RESET_GET_BOARD_REV(val);
return 0;
}
/* -------------------- PCI INITIALIZATION/SHUTDOWN: */
static int lanai_pci_start(struct lanai_dev *lanai)
{
struct pci_dev *pci = lanai->pci;
int result;
if (pci_enable_device(pci) != 0) {
printk(KERN_ERR DEV_LABEL "(itf %d): can't enable "
"PCI device", lanai->number);
return -ENXIO;
}
pci_set_master(pci);
if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32)) != 0) {
printk(KERN_WARNING DEV_LABEL
"(itf %d): No suitable DMA available.\n", lanai->number);
return -EBUSY;
}
result = check_board_id_and_rev("PCI", pci->subsystem_device, NULL);
if (result != 0)
return result;
/* Set latency timer to zero as per lanai docs */
result = pci_write_config_byte(pci, PCI_LATENCY_TIMER, 0);
if (result != PCIBIOS_SUCCESSFUL) {
printk(KERN_ERR DEV_LABEL "(itf %d): can't write "
"PCI_LATENCY_TIMER: %d\n", lanai->number, result);
return -EINVAL;
}
pcistatus_check(lanai, 1);
pcistatus_check(lanai, 0);
return 0;
}
/* -------------------- VPI/VCI ALLOCATION: */
/*
* We _can_ use VCI==0 for normal traffic, but only for UBR (or we'll
* get a CBRZERO interrupt), and we can use it only if no one is receiving
* AAL0 traffic (since they will use the same queue) - according to the
* docs we shouldn't even use it for AAL0 traffic
*/
static inline int vci0_is_ok(struct lanai_dev *lanai,
const struct atm_qos *qos)
{
if (qos->txtp.traffic_class == ATM_CBR || qos->aal == ATM_AAL0)
return 0;
if (qos->rxtp.traffic_class != ATM_NONE) {
if (lanai->naal0 != 0)
return 0;
lanai->conf2 |= CONFIG2_VCI0_NORMAL;
conf2_write_if_powerup(lanai);
}
return 1;
}
/* return true if vci is currently unused, or if requested qos is
* compatible
*/
static int vci_is_ok(struct lanai_dev *lanai, vci_t vci,
const struct atm_vcc *atmvcc)
{
const struct atm_qos *qos = &atmvcc->qos;
const struct lanai_vcc *lvcc = lanai->vccs[vci];
if (vci == 0 && !vci0_is_ok(lanai, qos))
return 0;
if (unlikely(lvcc != NULL)) {
if (qos->rxtp.traffic_class != ATM_NONE &&
lvcc->rx.atmvcc != NULL && lvcc->rx.atmvcc != atmvcc)
return 0;
if (qos->txtp.traffic_class != ATM_NONE &&
lvcc->tx.atmvcc != NULL && lvcc->tx.atmvcc != atmvcc)
return 0;
if (qos->txtp.traffic_class == ATM_CBR &&
lanai->cbrvcc != NULL && lanai->cbrvcc != atmvcc)
return 0;
}
if (qos->aal == ATM_AAL0 && lanai->naal0 == 0 &&
qos->rxtp.traffic_class != ATM_NONE) {
const struct lanai_vcc *vci0 = lanai->vccs[0];
if (vci0 != NULL && vci0->rx.atmvcc != NULL)
return 0;
lanai->conf2 &= ~CONFIG2_VCI0_NORMAL;
conf2_write_if_powerup(lanai);
}
return 1;
}
static int lanai_normalize_ci(struct lanai_dev *lanai,
const struct atm_vcc *atmvcc, short *vpip, vci_t *vcip)
{
switch (*vpip) {
case ATM_VPI_ANY:
*vpip = 0;
/* FALLTHROUGH */
case 0:
break;
default:
return -EADDRINUSE;
}
switch (*vcip) {
case ATM_VCI_ANY:
for (*vcip = ATM_NOT_RSV_VCI; *vcip < lanai->num_vci;
(*vcip)++)
if (vci_is_ok(lanai, *vcip, atmvcc))
return 0;
return -EADDRINUSE;
default:
if (*vcip >= lanai->num_vci || *vcip < 0 ||
!vci_is_ok(lanai, *vcip, atmvcc))
return -EADDRINUSE;
}
return 0;
}
/* -------------------- MANAGE CBR: */
/*
* CBR ICG is stored as a fixed-point number with 4 fractional bits.
* Note that storing a number greater than 2046.0 will result in
* incorrect shaping
*/
#define CBRICG_FRAC_BITS (4)
#define CBRICG_MAX (2046 << CBRICG_FRAC_BITS)
/*
* ICG is related to PCR with the formula PCR = MAXPCR / (ICG + 1)
* where MAXPCR is (according to the docs) 25600000/(54*8),
* which is equal to (3125<<9)/27.
*
* Solving for ICG, we get:
* ICG = MAXPCR/PCR - 1
* ICG = (3125<<9)/(27*PCR) - 1
* ICG = ((3125<<9) - (27*PCR)) / (27*PCR)
*
* The end result is supposed to be a fixed-point number with FRAC_BITS
* bits of a fractional part, so we keep everything in the numerator
* shifted by that much as we compute
*
*/
static int pcr_to_cbricg(const struct atm_qos *qos)
{
int rounddown = 0; /* 1 = Round PCR down, i.e. round ICG _up_ */
int x, icg, pcr = atm_pcr_goal(&qos->txtp);
if (pcr == 0) /* Use maximum bandwidth */
return 0;
if (pcr < 0) {
rounddown = 1;
pcr = -pcr;
}
x = pcr * 27;
icg = (3125 << (9 + CBRICG_FRAC_BITS)) - (x << CBRICG_FRAC_BITS);
if (rounddown)
icg += x - 1;
icg /= x;
if (icg > CBRICG_MAX)
icg = CBRICG_MAX;
DPRINTK("pcr_to_cbricg: pcr=%d rounddown=%c icg=%d\n",
pcr, rounddown ? 'Y' : 'N', icg);
return icg;
}
static inline void lanai_cbr_setup(struct lanai_dev *lanai)
{
reg_write(lanai, pcr_to_cbricg(&lanai->cbrvcc->qos), CBR_ICG_Reg);
reg_write(lanai, lanai->cbrvcc->vci, CBR_PTR_Reg);
lanai->conf2 |= CONFIG2_CBR_ENABLE;
conf2_write(lanai);
}
static inline void lanai_cbr_shutdown(struct lanai_dev *lanai)
{
lanai->conf2 &= ~CONFIG2_CBR_ENABLE;
conf2_write(lanai);
}
/* -------------------- OPERATIONS: */
/* setup a newly detected device */
static int lanai_dev_open(struct atm_dev *atmdev)
{
struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
unsigned long raw_base;
int result;
DPRINTK("In lanai_dev_open()\n");
/* Basic device fields */
lanai->number = atmdev->number;
lanai->num_vci = NUM_VCI;
bitmap_zero(lanai->backlog_vccs, NUM_VCI);
bitmap_zero(lanai->transmit_ready, NUM_VCI);
lanai->naal0 = 0;
#ifdef USE_POWERDOWN
lanai->nbound = 0;
#endif
lanai->cbrvcc = NULL;
memset(&lanai->stats, 0, sizeof lanai->stats);
spin_lock_init(&lanai->endtxlock);
spin_lock_init(&lanai->servicelock);
atmdev->ci_range.vpi_bits = 0;
atmdev->ci_range.vci_bits = 0;
while (1 << atmdev->ci_range.vci_bits < lanai->num_vci)
atmdev->ci_range.vci_bits++;
atmdev->link_rate = ATM_25_PCR;
/* 3.2: PCI initialization */
if ((result = lanai_pci_start(lanai)) != 0)
goto error;
raw_base = lanai->pci->resource[0].start;
lanai->base = (bus_addr_t) ioremap(raw_base, LANAI_MAPPING_SIZE);
if (lanai->base == NULL) {
printk(KERN_ERR DEV_LABEL ": couldn't remap I/O space\n");
result = -ENOMEM;
goto error_pci;
}
/* 3.3: Reset lanai and PHY */
reset_board(lanai);
lanai->conf1 = reg_read(lanai, Config1_Reg);
lanai->conf1 &= ~(CONFIG1_GPOUT1 | CONFIG1_POWERDOWN |
CONFIG1_MASK_LEDMODE);
lanai->conf1 |= CONFIG1_SET_LEDMODE(LEDMODE_NOT_SOOL);
reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg);
udelay(1000);
conf1_write(lanai);
/*
* 3.4: Turn on endian mode for big-endian hardware
* We don't actually want to do this - the actual bit fields
* in the endian register are not documented anywhere.
* Instead we do the bit-flipping ourselves on big-endian
* hardware.
*
* 3.5: get the board ID/rev by reading the reset register
*/
result = check_board_id_and_rev("register",
reg_read(lanai, Reset_Reg), &lanai->board_rev);
if (result != 0)
goto error_unmap;
/* 3.6: read EEPROM */
if ((result = eeprom_read(lanai)) != 0)
goto error_unmap;
if ((result = eeprom_validate(lanai)) != 0)
goto error_unmap;
/* 3.7: re-reset PHY, do loopback tests, setup PHY */
reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg);
udelay(1000);
conf1_write(lanai);
/* TODO - loopback tests */
lanai->conf1 |= (CONFIG1_GPOUT2 | CONFIG1_GPOUT3 | CONFIG1_DMA_ENABLE);
conf1_write(lanai);
/* 3.8/3.9: test and initialize card SRAM */
if ((result = sram_test_and_clear(lanai)) != 0)
goto error_unmap;
/* 3.10: initialize lanai registers */
lanai->conf1 |= CONFIG1_DMA_ENABLE;
conf1_write(lanai);
if ((result = service_buffer_allocate(lanai)) != 0)
goto error_unmap;
if ((result = vcc_table_allocate(lanai)) != 0)
goto error_service;
lanai->conf2 = (lanai->num_vci >= 512 ? CONFIG2_HOWMANY : 0) |
CONFIG2_HEC_DROP | /* ??? */ CONFIG2_PTI7_MODE;
conf2_write(lanai);
reg_write(lanai, TX_FIFO_DEPTH, TxDepth_Reg);
reg_write(lanai, 0, CBR_ICG_Reg); /* CBR defaults to no limit */
if ((result = request_irq(lanai->pci->irq, lanai_int, IRQF_SHARED,
DEV_LABEL, lanai)) != 0) {
printk(KERN_ERR DEV_LABEL ": can't allocate interrupt\n");
goto error_vcctable;
}
mb(); /* Make sure that all that made it */
intr_enable(lanai, INT_ALL & ~(INT_PING | INT_WAKE));
/* 3.11: initialize loop mode (i.e. turn looping off) */
lanai->conf1 = (lanai->conf1 & ~CONFIG1_MASK_LOOPMODE) |
CONFIG1_SET_LOOPMODE(LOOPMODE_NORMAL) |
CONFIG1_GPOUT2 | CONFIG1_GPOUT3;
conf1_write(lanai);
lanai->status = reg_read(lanai, Status_Reg);
/* We're now done initializing this card */
#ifdef USE_POWERDOWN
lanai->conf1 |= CONFIG1_POWERDOWN;
conf1_write(lanai);
#endif
memcpy(atmdev->esi, eeprom_mac(lanai), ESI_LEN);
lanai_timed_poll_start(lanai);
printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d, base=%p, irq=%u "
"(%pMF)\n", lanai->number, (int) lanai->pci->revision,
lanai->base, lanai->pci->irq, atmdev->esi);
printk(KERN_NOTICE DEV_LABEL "(itf %d): LANAI%s, serialno=%u(0x%X), "
"board_rev=%d\n", lanai->number,
lanai->type==lanai2 ? "2" : "HB", (unsigned int) lanai->serialno,
(unsigned int) lanai->serialno, lanai->board_rev);
return 0;
error_vcctable:
vcc_table_deallocate(lanai);
error_service:
service_buffer_deallocate(lanai);
error_unmap:
reset_board(lanai);
#ifdef USE_POWERDOWN
lanai->conf1 = reg_read(lanai, Config1_Reg) | CONFIG1_POWERDOWN;
conf1_write(lanai);
#endif
iounmap(lanai->base);
error_pci:
pci_disable_device(lanai->pci);
error:
return result;
}
/* called when device is being shutdown, and all vcc's are gone - higher
* levels will deallocate the atm device for us
*/
static void lanai_dev_close(struct atm_dev *atmdev)
{
struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
printk(KERN_INFO DEV_LABEL "(itf %d): shutting down interface\n",
lanai->number);
lanai_timed_poll_stop(lanai);
#ifdef USE_POWERDOWN
lanai->conf1 = reg_read(lanai, Config1_Reg) & ~CONFIG1_POWERDOWN;
conf1_write(lanai);
#endif
intr_disable(lanai, INT_ALL);
free_irq(lanai->pci->irq, lanai);
reset_board(lanai);
#ifdef USE_POWERDOWN
lanai->conf1 |= CONFIG1_POWERDOWN;
conf1_write(lanai);
#endif
pci_disable_device(lanai->pci);
vcc_table_deallocate(lanai);
service_buffer_deallocate(lanai);
iounmap(lanai->base);
kfree(lanai);
}
/* close a vcc */
static void lanai_close(struct atm_vcc *atmvcc)
{
struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data;
struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data;
if (lvcc == NULL)
return;
clear_bit(ATM_VF_READY, &atmvcc->flags);
clear_bit(ATM_VF_PARTIAL, &atmvcc->flags);
if (lvcc->rx.atmvcc == atmvcc) {
lanai_shutdown_rx_vci(lvcc);
if (atmvcc->qos.aal == ATM_AAL0) {
if (--lanai->naal0 <= 0)
aal0_buffer_free(lanai);
} else
lanai_buf_deallocate(&lvcc->rx.buf, lanai->pci);
lvcc->rx.atmvcc = NULL;
}
if (lvcc->tx.atmvcc == atmvcc) {
if (atmvcc == lanai->cbrvcc) {
if (lvcc->vbase != NULL)
lanai_cbr_shutdown(lanai);
lanai->cbrvcc = NULL;
}
lanai_shutdown_tx_vci(lanai, lvcc);
lanai_buf_deallocate(&lvcc->tx.buf, lanai->pci);
lvcc->tx.atmvcc = NULL;
}
if (--lvcc->nref == 0) {
host_vcc_unbind(lanai, lvcc);
kfree(lvcc);
}
atmvcc->dev_data = NULL;
clear_bit(ATM_VF_ADDR, &atmvcc->flags);
}
/* open a vcc on the card to vpi/vci */
static int lanai_open(struct atm_vcc *atmvcc)
{
struct lanai_dev *lanai;
struct lanai_vcc *lvcc;
int result = 0;
int vci = atmvcc->vci;
short vpi = atmvcc->vpi;
/* we don't support partial open - it's not really useful anyway */
if ((test_bit(ATM_VF_PARTIAL, &atmvcc->flags)) ||
(vpi == ATM_VPI_UNSPEC) || (vci == ATM_VCI_UNSPEC))
return -EINVAL;
lanai = (struct lanai_dev *) atmvcc->dev->dev_data;
result = lanai_normalize_ci(lanai, atmvcc, &vpi, &vci);
if (unlikely(result != 0))
goto out;
set_bit(ATM_VF_ADDR, &atmvcc->flags);
if (atmvcc->qos.aal != ATM_AAL0 && atmvcc->qos.aal != ATM_AAL5)
return -EINVAL;
DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n", lanai->number,
(int) vpi, vci);
lvcc = lanai->vccs[vci];
if (lvcc == NULL) {
lvcc = new_lanai_vcc();
if (unlikely(lvcc == NULL))
return -ENOMEM;
atmvcc->dev_data = lvcc;
}
lvcc->nref++;
if (atmvcc->qos.rxtp.traffic_class != ATM_NONE) {
APRINTK(lvcc->rx.atmvcc == NULL, "rx.atmvcc!=NULL, vci=%d\n",
vci);
if (atmvcc->qos.aal == ATM_AAL0) {
if (lanai->naal0 == 0)
result = aal0_buffer_allocate(lanai);
} else
result = lanai_setup_rx_vci_aal5(
lanai, lvcc, &atmvcc->qos);
if (unlikely(result != 0))
goto out_free;
lvcc->rx.atmvcc = atmvcc;
lvcc->stats.rx_nomem = 0;
lvcc->stats.x.aal5.rx_badlen = 0;
lvcc->stats.x.aal5.service_trash = 0;
lvcc->stats.x.aal5.service_stream = 0;
lvcc->stats.x.aal5.service_rxcrc = 0;
if (atmvcc->qos.aal == ATM_AAL0)
lanai->naal0++;
}
if (atmvcc->qos.txtp.traffic_class != ATM_NONE) {
APRINTK(lvcc->tx.atmvcc == NULL, "tx.atmvcc!=NULL, vci=%d\n",
vci);
result = lanai_setup_tx_vci(lanai, lvcc, &atmvcc->qos);
if (unlikely(result != 0))
goto out_free;
lvcc->tx.atmvcc = atmvcc;
if (atmvcc->qos.txtp.traffic_class == ATM_CBR) {
APRINTK(lanai->cbrvcc == NULL,
"cbrvcc!=NULL, vci=%d\n", vci);
lanai->cbrvcc = atmvcc;
}
}
host_vcc_bind(lanai, lvcc, vci);
/*
* Make sure everything made it to RAM before we tell the card about
* the VCC
*/
wmb();
if (atmvcc == lvcc->rx.atmvcc)
host_vcc_start_rx(lvcc);
if (atmvcc == lvcc->tx.atmvcc) {
host_vcc_start_tx(lvcc);
if (lanai->cbrvcc == atmvcc)
lanai_cbr_setup(lanai);
}
set_bit(ATM_VF_READY, &atmvcc->flags);
return 0;
out_free:
lanai_close(atmvcc);
out:
return result;
}
static int lanai_send(struct atm_vcc *atmvcc, struct sk_buff *skb)
{
struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data;
struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data;
unsigned long flags;
if (unlikely(lvcc == NULL || lvcc->vbase == NULL ||
lvcc->tx.atmvcc != atmvcc))
goto einval;
#ifdef DEBUG
if (unlikely(skb == NULL)) {
DPRINTK("lanai_send: skb==NULL for vci=%d\n", atmvcc->vci);
goto einval;
}
if (unlikely(lanai == NULL)) {
DPRINTK("lanai_send: lanai==NULL for vci=%d\n", atmvcc->vci);
goto einval;
}
#endif
ATM_SKB(skb)->vcc = atmvcc;
switch (atmvcc->qos.aal) {
case ATM_AAL5:
read_lock_irqsave(&vcc_sklist_lock, flags);
vcc_tx_aal5(lanai, lvcc, skb);
read_unlock_irqrestore(&vcc_sklist_lock, flags);
return 0;
case ATM_AAL0:
if (unlikely(skb->len != ATM_CELL_SIZE-1))
goto einval;
/* NOTE - this next line is technically invalid - we haven't unshared skb */
cpu_to_be32s((u32 *) skb->data);
read_lock_irqsave(&vcc_sklist_lock, flags);
vcc_tx_aal0(lanai, lvcc, skb);
read_unlock_irqrestore(&vcc_sklist_lock, flags);
return 0;
}
DPRINTK("lanai_send: bad aal=%d on vci=%d\n", (int) atmvcc->qos.aal,
atmvcc->vci);
einval:
lanai_free_skb(atmvcc, skb);
return -EINVAL;
}
static int lanai_change_qos(struct atm_vcc *atmvcc,
/*const*/ struct atm_qos *qos, int flags)
{
return -EBUSY; /* TODO: need to write this */
}
#ifndef CONFIG_PROC_FS
#define lanai_proc_read NULL
#else
static int lanai_proc_read(struct atm_dev *atmdev, loff_t *pos, char *page)
{
struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
loff_t left = *pos;
struct lanai_vcc *lvcc;
if (left-- == 0)
return sprintf(page, DEV_LABEL "(itf %d): chip=LANAI%s, "
"serial=%u, magic=0x%08X, num_vci=%d\n",
atmdev->number, lanai->type==lanai2 ? "2" : "HB",
(unsigned int) lanai->serialno,
(unsigned int) lanai->magicno, lanai->num_vci);
if (left-- == 0)
return sprintf(page, "revision: board=%d, pci_if=%d\n",
lanai->board_rev, (int) lanai->pci->revision);
if (left-- == 0)
return sprintf(page, "EEPROM ESI: %pM\n",
&lanai->eeprom[EEPROM_MAC]);
if (left-- == 0)
return sprintf(page, "status: SOOL=%d, LOCD=%d, LED=%d, "
"GPIN=%d\n", (lanai->status & STATUS_SOOL) ? 1 : 0,
(lanai->status & STATUS_LOCD) ? 1 : 0,
(lanai->status & STATUS_LED) ? 1 : 0,
(lanai->status & STATUS_GPIN) ? 1 : 0);
if (left-- == 0)
return sprintf(page, "global buffer sizes: service=%zu, "
"aal0_rx=%zu\n", lanai_buf_size(&lanai->service),
lanai->naal0 ? lanai_buf_size(&lanai->aal0buf) : 0);
if (left-- == 0) {
get_statistics(lanai);
return sprintf(page, "cells in error: overflow=%u, "
"closed_vci=%u, bad_HEC=%u, rx_fifo=%u\n",
lanai->stats.ovfl_trash, lanai->stats.vci_trash,
lanai->stats.hec_err, lanai->stats.atm_ovfl);
}
if (left-- == 0)
return sprintf(page, "PCI errors: parity_detect=%u, "
"master_abort=%u, master_target_abort=%u,\n",
lanai->stats.pcierr_parity_detect,
lanai->stats.pcierr_serr_set,
lanai->stats.pcierr_m_target_abort);
if (left-- == 0)
return sprintf(page, " slave_target_abort=%u, "
"master_parity=%u\n", lanai->stats.pcierr_s_target_abort,
lanai->stats.pcierr_master_parity);
if (left-- == 0)
return sprintf(page, " no_tx=%u, "
"no_rx=%u, bad_rx_aal=%u\n", lanai->stats.service_norx,
lanai->stats.service_notx,
lanai->stats.service_rxnotaal5);
if (left-- == 0)
return sprintf(page, "resets: dma=%u, card=%u\n",
lanai->stats.dma_reenable, lanai->stats.card_reset);
/* At this point, "left" should be the VCI we're looking for */
read_lock(&vcc_sklist_lock);
for (; ; left++) {
if (left >= NUM_VCI) {
left = 0;
goto out;
}
if ((lvcc = lanai->vccs[left]) != NULL)
break;
(*pos)++;
}
/* Note that we re-use "left" here since we're done with it */
left = sprintf(page, "VCI %4d: nref=%d, rx_nomem=%u", (vci_t) left,
lvcc->nref, lvcc->stats.rx_nomem);
if (lvcc->rx.atmvcc != NULL) {
left += sprintf(&page[left], ",\n rx_AAL=%d",
lvcc->rx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0);
if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5)
left += sprintf(&page[left], ", rx_buf_size=%zu, "
"rx_bad_len=%u,\n rx_service_trash=%u, "
"rx_service_stream=%u, rx_bad_crc=%u",
lanai_buf_size(&lvcc->rx.buf),
lvcc->stats.x.aal5.rx_badlen,
lvcc->stats.x.aal5.service_trash,
lvcc->stats.x.aal5.service_stream,
lvcc->stats.x.aal5.service_rxcrc);
}
if (lvcc->tx.atmvcc != NULL)
left += sprintf(&page[left], ",\n tx_AAL=%d, "
"tx_buf_size=%zu, tx_qos=%cBR, tx_backlogged=%c",
lvcc->tx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0,
lanai_buf_size(&lvcc->tx.buf),
lvcc->tx.atmvcc == lanai->cbrvcc ? 'C' : 'U',
vcc_is_backlogged(lvcc) ? 'Y' : 'N');
page[left++] = '\n';
page[left] = '\0';
out:
read_unlock(&vcc_sklist_lock);
return left;
}
#endif /* CONFIG_PROC_FS */
/* -------------------- HOOKS: */
static const struct atmdev_ops ops = {
.dev_close = lanai_dev_close,
.open = lanai_open,
.close = lanai_close,
.getsockopt = NULL,
.setsockopt = NULL,
.send = lanai_send,
.phy_put = NULL,
.phy_get = NULL,
.change_qos = lanai_change_qos,
.proc_read = lanai_proc_read,
.owner = THIS_MODULE
};
/* initialize one probed card */
static int lanai_init_one(struct pci_dev *pci,
const struct pci_device_id *ident)
{
struct lanai_dev *lanai;
struct atm_dev *atmdev;
int result;
lanai = kmalloc(sizeof(*lanai), GFP_KERNEL);
if (lanai == NULL) {
printk(KERN_ERR DEV_LABEL
": couldn't allocate dev_data structure!\n");
return -ENOMEM;
}
atmdev = atm_dev_register(DEV_LABEL, &pci->dev, &ops, -1, NULL);
if (atmdev == NULL) {
printk(KERN_ERR DEV_LABEL
": couldn't register atm device!\n");
kfree(lanai);
return -EBUSY;
}
atmdev->dev_data = lanai;
lanai->pci = pci;
lanai->type = (enum lanai_type) ident->device;
result = lanai_dev_open(atmdev);
if (result != 0) {
DPRINTK("lanai_start() failed, err=%d\n", -result);
atm_dev_deregister(atmdev);
kfree(lanai);
}
return result;
}
static const struct pci_device_id lanai_pci_tbl[] = {
{ PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAI2) },
{ PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAIHB) },
{ 0, } /* terminal entry */
};
MODULE_DEVICE_TABLE(pci, lanai_pci_tbl);
static struct pci_driver lanai_driver = {
.name = DEV_LABEL,
.id_table = lanai_pci_tbl,
.probe = lanai_init_one,
};
module_pci_driver(lanai_driver);
MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>");
MODULE_DESCRIPTION("Efficient Networks Speedstream 3010 driver");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink