// SPDX-License-Identifier: GPL-2.0-only /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/pci.h> #include <linux/errno.h> #include <linux/atm.h> #include <linux/atmdev.h> #include <linux/sonet.h> #include <linux/skbuff.h> #include <linux/time.h> #include <linux/delay.h> #include <linux/uio.h> #include <linux/init.h> #include <linux/atm_eni.h> #include <linux/bitops.h> #include <linux/slab.h> #include <asm/io.h> #include <linux/atomic.h> #include <linux/uaccess.h> #include <asm/string.h> #include <asm/byteorder.h> #include "tonga.h" #include "midway.h" #include "suni.h" #include "eni.h" /* * TODO: * * Show stoppers * none * * Minor * - OAM support * - fix bugs listed below */ /* * KNOWN BUGS: * * - may run into JK-JK bug and deadlock * - should allocate UBR channel first * - buffer space allocation algorithm is stupid * (RX: should be maxSDU+maxdelay*rate * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) * - doesn't support OAM cells * - eni_put_free may hang if not putting memory fragments that _complete_ * 2^n block (never happens in real life, though) */ #if 0 #define DPRINTK … #else #define DPRINTK(format,args...) … #endif #ifndef CONFIG_ATM_ENI_TUNE_BURST #define CONFIG_ATM_ENI_BURST_TX_8W #define CONFIG_ATM_ENI_BURST_RX_4W #endif #ifndef CONFIG_ATM_ENI_DEBUG #define NULLCHECK … #define EVENT … static void event_dump(void) { } #else /* * NULL pointer checking */ #define NULLCHECK(x) … /* * Very extensive activity logging. Greatly improves bug detection speed but * costs a few Mbps if enabled. */ #define EV … static const char *ev[EV]; static unsigned long ev_a[EV],ev_b[EV]; static int ec = …; static void EVENT(const char *s,unsigned long a,unsigned long b) { … } static void event_dump(void) { … } #endif /* CONFIG_ATM_ENI_DEBUG */ /* * NExx must not be equal at end * EExx may be equal at end * xxPJOK verify validity of pointer jumps * xxPMOK operating on a circular buffer of "c" words */ #define NEPJOK(a0,a1,b) … #define EEPJOK(a0,a1,b) … #define NEPMOK(a0,d,b,c) … #define EEPMOK(a0,d,b,c) … static int tx_complete = …,dma_complete = …,queued = …,requeued = …, backlogged = …,rx_enqueued = …,rx_dequeued = …,pushed = …,submitted = …, putting = …; static struct atm_dev *eni_boards = …; /* Read/write registers on card */ #define eni_in(r) … #define eni_out(v,r) … /*-------------------------------- utilities --------------------------------*/ static void dump_mem(struct eni_dev *eni_dev) { … } static void dump(struct atm_dev *dev) { … } static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { … } static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) { … } static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { … } /*----------------------------------- RX ------------------------------------*/ #define ENI_VCC_NOS … static void rx_ident_err(struct atm_vcc *vcc) { … } static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, unsigned long skip,unsigned long size,unsigned long eff) { … } static void discard(struct atm_vcc *vcc,unsigned long size) { … } /* * TODO: should check whether direct copies (without DMA setup, dequeuing on * interrupt, etc.) aren't much faster for AAL0 */ static int rx_aal0(struct atm_vcc *vcc) { … } static int rx_aal5(struct atm_vcc *vcc) { … } static inline int rx_vcc(struct atm_vcc *vcc) { … } static void poll_rx(struct atm_dev *dev) { … } static void get_service(struct atm_dev *dev) { … } static void dequeue_rx(struct atm_dev *dev) { … } static int open_rx_first(struct atm_vcc *vcc) { … } static int open_rx_second(struct atm_vcc *vcc) { … } static void close_rx(struct atm_vcc *vcc) { … } static int start_rx(struct atm_dev *dev) { … } /*----------------------------------- TX ------------------------------------*/ enum enq_res { … }; static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, u32 size) { … } static enum enq_res do_tx(struct sk_buff *skb) { … } static void poll_tx(struct atm_dev *dev) { … } static void dequeue_tx(struct atm_dev *dev) { … } static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) { … } static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, int *res,int unlimited) { … } static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, int set_rsv,int set_shp) { … } static int open_tx_first(struct atm_vcc *vcc) { … } static int open_tx_second(struct atm_vcc *vcc) { … } static void close_tx(struct atm_vcc *vcc) { … } static int start_tx(struct atm_dev *dev) { … } /*--------------------------------- common ----------------------------------*/ #if 0 /* may become useful again when tuning things */ static void foo(void) { printk(KERN_INFO "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", tx_complete,dma_complete,queued,requeued,submitted,backlogged, rx_enqueued,rx_dequeued,putting,pushed); if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); } #endif static void bug_int(struct atm_dev *dev,unsigned long reason) { … } static irqreturn_t eni_int(int irq,void *dev_id) { … } static void eni_tasklet(unsigned long data) { … } /*--------------------------------- entries ---------------------------------*/ static char * const media_name[] = …; #define SET_SEPROM … #define GET_SEPROM … static int get_esi_asic(struct atm_dev *dev) { … } #undef SET_SEPROM #undef GET_SEPROM static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) { … } static int eni_do_init(struct atm_dev *dev) { … } static void eni_do_release(struct atm_dev *dev) { … } static int eni_start(struct atm_dev *dev) { … } static void eni_close(struct atm_vcc *vcc) { … } static int eni_open(struct atm_vcc *vcc) { … } static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) { … } static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) { … } static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) { … } static void eni_phy_put(struct atm_dev *dev,unsigned char value, unsigned long addr) { … } static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) { … } static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) { … } static const struct atmdev_ops ops = …; static int eni_init_one(struct pci_dev *pci_dev, const struct pci_device_id *ent) { … } static const struct pci_device_id eni_pci_tbl[] = …; MODULE_DEVICE_TABLE(pci,eni_pci_tbl); static void eni_remove_one(struct pci_dev *pdev) { … } static struct pci_driver eni_driver = …; static int __init eni_init(void) { … } module_init(…) …; /* @@@ since exit routine not defined, this module can not be unloaded */ MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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