--- /dev/null
+/* lanai.c -- Copyright 1999-2003 by Mitchell Blank Jr <mitch@sfgoth.com>
+ *
+ * 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.
+ *
+ * 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 0x%08lX, size %Zu(%d)\n",
+ (unsigned long) 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(unsigned long arg)
+{
+ struct lanai_dev *lanai = (struct lanai_dev *) arg;
+#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)
+{
+ init_timer(&lanai->timer);
+ lanai->timer.expires = jiffies + LANAI_POLL_PERIOD;
+ lanai->timer.data = (unsigned long) lanai;
+ lanai->timer.function = lanai_timed_poll;
+ 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");
+ 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=0x%lx, irq=%u "
+ "(%pMF)\n", lanai->number, (int) lanai->pci->revision,
+ (unsigned long) 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 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");
Code Review / kvmfornfv.git / blobdiff