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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 00:20:36 +0200
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 00:20:36 +0200
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/atm/nicstar.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/atm/nicstar.c')
-rw-r--r--drivers/atm/nicstar.c3105
1 files changed, 3105 insertions, 0 deletions
diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
new file mode 100644
index 000000000000..85bf5c8442b0
--- /dev/null
+++ b/drivers/atm/nicstar.c
@@ -0,0 +1,3105 @@
+/******************************************************************************
+ *
+ * nicstar.c
+ *
+ * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
+ *
+ * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
+ * It was taken from the frle-0.22 device driver.
+ * As the file doesn't have a copyright notice, in the file
+ * nicstarmac.copyright I put the copyright notice from the
+ * frle-0.22 device driver.
+ * Some code is based on the nicstar driver by M. Welsh.
+ *
+ * Author: Rui Prior (rprior@inescn.pt)
+ * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
+ *
+ *
+ * (C) INESC 1999
+ *
+ *
+ ******************************************************************************/
+
+
+/**** IMPORTANT INFORMATION ***************************************************
+ *
+ * There are currently three types of spinlocks:
+ *
+ * 1 - Per card interrupt spinlock (to protect structures and such)
+ * 2 - Per SCQ scq spinlock
+ * 3 - Per card resource spinlock (to access registers, etc.)
+ *
+ * These must NEVER be grabbed in reverse order.
+ *
+ ******************************************************************************/
+
+/* Header files ***************************************************************/
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/atmdev.h>
+#include <linux/atm.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include "nicstar.h"
+#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
+#include "suni.h"
+#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
+#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
+#include "idt77105.h"
+#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
+
+#if BITS_PER_LONG != 32
+# error FIXME: this driver requires a 32-bit platform
+#endif
+
+/* Additional code ************************************************************/
+
+#include "nicstarmac.c"
+
+
+/* Configurable parameters ****************************************************/
+
+#undef PHY_LOOPBACK
+#undef TX_DEBUG
+#undef RX_DEBUG
+#undef GENERAL_DEBUG
+#undef EXTRA_DEBUG
+
+#undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
+ you're going to use only raw ATM */
+
+
+/* Do not touch these *********************************************************/
+
+#ifdef TX_DEBUG
+#define TXPRINTK(args...) printk(args)
+#else
+#define TXPRINTK(args...)
+#endif /* TX_DEBUG */
+
+#ifdef RX_DEBUG
+#define RXPRINTK(args...) printk(args)
+#else
+#define RXPRINTK(args...)
+#endif /* RX_DEBUG */
+
+#ifdef GENERAL_DEBUG
+#define PRINTK(args...) printk(args)
+#else
+#define PRINTK(args...)
+#endif /* GENERAL_DEBUG */
+
+#ifdef EXTRA_DEBUG
+#define XPRINTK(args...) printk(args)
+#else
+#define XPRINTK(args...)
+#endif /* EXTRA_DEBUG */
+
+
+/* Macros *********************************************************************/
+
+#define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
+
+#define NS_DELAY mdelay(1)
+
+#define ALIGN_BUS_ADDR(addr, alignment) \
+ ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
+#define ALIGN_ADDRESS(addr, alignment) \
+ bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment))
+
+#undef CEIL
+
+#ifndef ATM_SKB
+#define ATM_SKB(s) (&(s)->atm)
+#endif
+
+ /* Spinlock debugging stuff */
+#ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */
+#define ns_grab_int_lock(card,flags) \
+ do { \
+ unsigned long nsdsf, nsdsf2; \
+ local_irq_save(flags); \
+ save_flags(nsdsf); cli();\
+ if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
+ (flags)&(1<<9)?"en":"dis"); \
+ if (spin_is_locked(&(card)->int_lock) && \
+ (card)->cpu_int == smp_processor_id()) { \
+ printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \
+ __LINE__, smp_processor_id(), (card)->has_int_lock, \
+ (card)->cpu_int); \
+ printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
+ } \
+ if (spin_is_locked(&(card)->res_lock) && \
+ (card)->cpu_res == smp_processor_id()) { \
+ printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \
+ __LINE__, smp_processor_id(), (card)->has_res_lock, \
+ (card)->cpu_res); \
+ printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
+ } \
+ spin_lock_irq(&(card)->int_lock); \
+ (card)->has_int_lock = __LINE__; \
+ (card)->cpu_int = smp_processor_id(); \
+ restore_flags(nsdsf); } while (0)
+#define ns_grab_res_lock(card,flags) \
+ do { \
+ unsigned long nsdsf, nsdsf2; \
+ local_irq_save(flags); \
+ save_flags(nsdsf); cli();\
+ if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
+ (flags)&(1<<9)?"en":"dis"); \
+ if (spin_is_locked(&(card)->res_lock) && \
+ (card)->cpu_res == smp_processor_id()) { \
+ printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \
+ __LINE__, smp_processor_id(), (card)->has_res_lock, \
+ (card)->cpu_res); \
+ printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
+ } \
+ spin_lock_irq(&(card)->res_lock); \
+ (card)->has_res_lock = __LINE__; \
+ (card)->cpu_res = smp_processor_id(); \
+ restore_flags(nsdsf); } while (0)
+#define ns_grab_scq_lock(card,scq,flags) \
+ do { \
+ unsigned long nsdsf, nsdsf2; \
+ local_irq_save(flags); \
+ save_flags(nsdsf); cli();\
+ if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
+ (flags)&(1<<9)?"en":"dis"); \
+ if (spin_is_locked(&(scq)->lock) && \
+ (scq)->cpu_lock == smp_processor_id()) { \
+ printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \
+ __LINE__, smp_processor_id(), (scq)->has_lock, \
+ (scq)->cpu_lock); \
+ printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
+ } \
+ if (spin_is_locked(&(card)->res_lock) && \
+ (card)->cpu_res == smp_processor_id()) { \
+ printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \
+ __LINE__, smp_processor_id(), (card)->has_res_lock, \
+ (card)->cpu_res); \
+ printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
+ } \
+ spin_lock_irq(&(scq)->lock); \
+ (scq)->has_lock = __LINE__; \
+ (scq)->cpu_lock = smp_processor_id(); \
+ restore_flags(nsdsf); } while (0)
+#else /* !NS_DEBUG_SPINLOCKS */
+#define ns_grab_int_lock(card,flags) \
+ spin_lock_irqsave(&(card)->int_lock,(flags))
+#define ns_grab_res_lock(card,flags) \
+ spin_lock_irqsave(&(card)->res_lock,(flags))
+#define ns_grab_scq_lock(card,scq,flags) \
+ spin_lock_irqsave(&(scq)->lock,flags)
+#endif /* NS_DEBUG_SPINLOCKS */
+
+
+/* Function declarations ******************************************************/
+
+static u32 ns_read_sram(ns_dev *card, u32 sram_address);
+static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
+static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
+static void __devinit ns_init_card_error(ns_dev *card, int error);
+static scq_info *get_scq(int size, u32 scd);
+static void free_scq(scq_info *scq, struct atm_vcc *vcc);
+static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
+ u32 handle2, u32 addr2);
+static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs);
+static int ns_open(struct atm_vcc *vcc);
+static void ns_close(struct atm_vcc *vcc);
+static void fill_tst(ns_dev *card, int n, vc_map *vc);
+static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
+static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
+ struct sk_buff *skb);
+static void process_tsq(ns_dev *card);
+static void drain_scq(ns_dev *card, scq_info *scq, int pos);
+static void process_rsq(ns_dev *card);
+static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
+#ifdef NS_USE_DESTRUCTORS
+static void ns_sb_destructor(struct sk_buff *sb);
+static void ns_lb_destructor(struct sk_buff *lb);
+static void ns_hb_destructor(struct sk_buff *hb);
+#endif /* NS_USE_DESTRUCTORS */
+static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
+static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
+static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
+static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
+static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
+static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
+static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
+static void which_list(ns_dev *card, struct sk_buff *skb);
+static void ns_poll(unsigned long arg);
+static int ns_parse_mac(char *mac, unsigned char *esi);
+static short ns_h2i(char c);
+static void ns_phy_put(struct atm_dev *dev, unsigned char value,
+ unsigned long addr);
+static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
+
+
+
+/* Global variables ***********************************************************/
+
+static struct ns_dev *cards[NS_MAX_CARDS];
+static unsigned num_cards;
+static struct atmdev_ops atm_ops =
+{
+ .open = ns_open,
+ .close = ns_close,
+ .ioctl = ns_ioctl,
+ .send = ns_send,
+ .phy_put = ns_phy_put,
+ .phy_get = ns_phy_get,
+ .proc_read = ns_proc_read,
+ .owner = THIS_MODULE,
+};
+static struct timer_list ns_timer;
+static char *mac[NS_MAX_CARDS];
+module_param_array(mac, charp, NULL, 0);
+MODULE_LICENSE("GPL");
+
+
+/* Functions*******************************************************************/
+
+static int __devinit nicstar_init_one(struct pci_dev *pcidev,
+ const struct pci_device_id *ent)
+{
+ static int index = -1;
+ unsigned int error;
+
+ index++;
+ cards[index] = NULL;
+
+ error = ns_init_card(index, pcidev);
+ if (error) {
+ cards[index--] = NULL; /* don't increment index */
+ goto err_out;
+ }
+
+ return 0;
+err_out:
+ return -ENODEV;
+}
+
+
+
+static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
+{
+ int i, j;
+ ns_dev *card = pci_get_drvdata(pcidev);
+ struct sk_buff *hb;
+ struct sk_buff *iovb;
+ struct sk_buff *lb;
+ struct sk_buff *sb;
+
+ i = card->index;
+
+ if (cards[i] == NULL)
+ return;
+
+ if (card->atmdev->phy && card->atmdev->phy->stop)
+ card->atmdev->phy->stop(card->atmdev);
+
+ /* Stop everything */
+ writel(0x00000000, card->membase + CFG);
+
+ /* De-register device */
+ atm_dev_deregister(card->atmdev);
+
+ /* Disable PCI device */
+ pci_disable_device(pcidev);
+
+ /* Free up resources */
+ j = 0;
+ PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
+ while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
+ {
+ dev_kfree_skb_any(hb);
+ j++;
+ }
+ PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
+ j = 0;
+ PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
+ while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
+ {
+ dev_kfree_skb_any(iovb);
+ j++;
+ }
+ PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
+ while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
+ dev_kfree_skb_any(lb);
+ while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
+ dev_kfree_skb_any(sb);
+ free_scq(card->scq0, NULL);
+ for (j = 0; j < NS_FRSCD_NUM; j++)
+ {
+ if (card->scd2vc[j] != NULL)
+ free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
+ }
+ kfree(card->rsq.org);
+ kfree(card->tsq.org);
+ free_irq(card->pcidev->irq, card);
+ iounmap(card->membase);
+ kfree(card);
+}
+
+
+
+static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
+{
+ {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {0,} /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
+
+
+
+static struct pci_driver nicstar_driver = {
+ .name = "nicstar",
+ .id_table = nicstar_pci_tbl,
+ .probe = nicstar_init_one,
+ .remove = __devexit_p(nicstar_remove_one),
+};
+
+
+
+static int __init nicstar_init(void)
+{
+ unsigned error = 0; /* Initialized to remove compile warning */
+
+ XPRINTK("nicstar: nicstar_init() called.\n");
+
+ error = pci_register_driver(&nicstar_driver);
+
+ TXPRINTK("nicstar: TX debug enabled.\n");
+ RXPRINTK("nicstar: RX debug enabled.\n");
+ PRINTK("nicstar: General debug enabled.\n");
+#ifdef PHY_LOOPBACK
+ printk("nicstar: using PHY loopback.\n");
+#endif /* PHY_LOOPBACK */
+ XPRINTK("nicstar: nicstar_init() returned.\n");
+
+ if (!error) {
+ init_timer(&ns_timer);
+ ns_timer.expires = jiffies + NS_POLL_PERIOD;
+ ns_timer.data = 0UL;
+ ns_timer.function = ns_poll;
+ add_timer(&ns_timer);
+ }
+
+ return error;
+}
+
+
+
+static void __exit nicstar_cleanup(void)
+{
+ XPRINTK("nicstar: nicstar_cleanup() called.\n");
+
+ del_timer(&ns_timer);
+
+ pci_unregister_driver(&nicstar_driver);
+
+ XPRINTK("nicstar: nicstar_cleanup() returned.\n");
+}
+
+
+
+static u32 ns_read_sram(ns_dev *card, u32 sram_address)
+{
+ unsigned long flags;
+ u32 data;
+ sram_address <<= 2;
+ sram_address &= 0x0007FFFC; /* address must be dword aligned */
+ sram_address |= 0x50000000; /* SRAM read command */
+ ns_grab_res_lock(card, flags);
+ while (CMD_BUSY(card));
+ writel(sram_address, card->membase + CMD);
+ while (CMD_BUSY(card));
+ data = readl(card->membase + DR0);
+ spin_unlock_irqrestore(&card->res_lock, flags);
+ return data;
+}
+
+
+
+static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
+{
+ unsigned long flags;
+ int i, c;
+ count--; /* count range now is 0..3 instead of 1..4 */
+ c = count;
+ c <<= 2; /* to use increments of 4 */
+ ns_grab_res_lock(card, flags);
+ while (CMD_BUSY(card));
+ for (i = 0; i <= c; i += 4)
+ writel(*(value++), card->membase + i);
+ /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
+ so card->membase + DR0 == card->membase */
+ sram_address <<= 2;
+ sram_address &= 0x0007FFFC;
+ sram_address |= (0x40000000 | count);
+ writel(sram_address, card->membase + CMD);
+ spin_unlock_irqrestore(&card->res_lock, flags);
+}
+
+
+static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
+{
+ int j;
+ struct ns_dev *card = NULL;
+ unsigned char pci_latency;
+ unsigned error;
+ u32 data;
+ u32 u32d[4];
+ u32 ns_cfg_rctsize;
+ int bcount;
+ unsigned long membase;
+
+ error = 0;
+
+ if (pci_enable_device(pcidev))
+ {
+ printk("nicstar%d: can't enable PCI device\n", i);
+ error = 2;
+ ns_init_card_error(card, error);
+ return error;
+ }
+
+ if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
+ {
+ printk("nicstar%d: can't allocate memory for device structure.\n", i);
+ error = 2;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ cards[i] = card;
+ spin_lock_init(&card->int_lock);
+ spin_lock_init(&card->res_lock);
+
+ pci_set_drvdata(pcidev, card);
+
+ card->index = i;
+ card->atmdev = NULL;
+ card->pcidev = pcidev;
+ membase = pci_resource_start(pcidev, 1);
+ card->membase = ioremap(membase, NS_IOREMAP_SIZE);
+ if (card->membase == 0)
+ {
+ printk("nicstar%d: can't ioremap() membase.\n",i);
+ error = 3;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
+
+ pci_set_master(pcidev);
+
+ if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
+ {
+ printk("nicstar%d: can't read PCI latency timer.\n", i);
+ error = 6;
+ ns_init_card_error(card, error);
+ return error;
+ }
+#ifdef NS_PCI_LATENCY
+ if (pci_latency < NS_PCI_LATENCY)
+ {
+ PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
+ for (j = 1; j < 4; j++)
+ {
+ if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
+ break;
+ }
+ if (j == 4)
+ {
+ printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
+ error = 7;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ }
+#endif /* NS_PCI_LATENCY */
+
+ /* Clear timer overflow */
+ data = readl(card->membase + STAT);
+ if (data & NS_STAT_TMROF)
+ writel(NS_STAT_TMROF, card->membase + STAT);
+
+ /* Software reset */
+ writel(NS_CFG_SWRST, card->membase + CFG);
+ NS_DELAY;
+ writel(0x00000000, card->membase + CFG);
+
+ /* PHY reset */
+ writel(0x00000008, card->membase + GP);
+ NS_DELAY;
+ writel(0x00000001, card->membase + GP);
+ NS_DELAY;
+ while (CMD_BUSY(card));
+ writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
+ NS_DELAY;
+
+ /* Detect PHY type */
+ while (CMD_BUSY(card));
+ writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
+ while (CMD_BUSY(card));
+ data = readl(card->membase + DR0);
+ switch(data) {
+ case 0x00000009:
+ printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
+ card->max_pcr = ATM_25_PCR;
+ while(CMD_BUSY(card));
+ writel(0x00000008, card->membase + DR0);
+ writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
+ /* Clear an eventual pending interrupt */
+ writel(NS_STAT_SFBQF, card->membase + STAT);
+#ifdef PHY_LOOPBACK
+ while(CMD_BUSY(card));
+ writel(0x00000022, card->membase + DR0);
+ writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
+#endif /* PHY_LOOPBACK */
+ break;
+ case 0x00000030:
+ case 0x00000031:
+ printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
+ card->max_pcr = ATM_OC3_PCR;
+#ifdef PHY_LOOPBACK
+ while(CMD_BUSY(card));
+ writel(0x00000002, card->membase + DR0);
+ writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
+#endif /* PHY_LOOPBACK */
+ break;
+ default:
+ printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
+ error = 8;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ writel(0x00000000, card->membase + GP);
+
+ /* Determine SRAM size */
+ data = 0x76543210;
+ ns_write_sram(card, 0x1C003, &data, 1);
+ data = 0x89ABCDEF;
+ ns_write_sram(card, 0x14003, &data, 1);
+ if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
+ ns_read_sram(card, 0x1C003) == 0x76543210)
+ card->sram_size = 128;
+ else
+ card->sram_size = 32;
+ PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
+
+ card->rct_size = NS_MAX_RCTSIZE;
+
+#if (NS_MAX_RCTSIZE == 4096)
+ if (card->sram_size == 128)
+ printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
+#elif (NS_MAX_RCTSIZE == 16384)
+ if (card->sram_size == 32)
+ {
+ printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
+ card->rct_size = 4096;
+ }
+#else
+#error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
+#endif
+
+ card->vpibits = NS_VPIBITS;
+ if (card->rct_size == 4096)
+ card->vcibits = 12 - NS_VPIBITS;
+ else /* card->rct_size == 16384 */
+ card->vcibits = 14 - NS_VPIBITS;
+
+ /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
+ if (mac[i] == NULL)
+ nicstar_init_eprom(card->membase);
+
+ if (request_irq(pcidev->irq, &ns_irq_handler, SA_INTERRUPT | SA_SHIRQ, "nicstar", card) != 0)
+ {
+ printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
+ error = 9;
+ ns_init_card_error(card, error);
+ return error;
+ }
+
+ /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
+ writel(0x00000000, card->membase + VPM);
+
+ /* Initialize TSQ */
+ card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
+ if (card->tsq.org == NULL)
+ {
+ printk("nicstar%d: can't allocate TSQ.\n", i);
+ error = 10;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
+ card->tsq.next = card->tsq.base;
+ card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
+ for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
+ ns_tsi_init(card->tsq.base + j);
+ writel(0x00000000, card->membase + TSQH);
+ writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
+ PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
+ (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
+
+ /* Initialize RSQ */
+ card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
+ if (card->rsq.org == NULL)
+ {
+ printk("nicstar%d: can't allocate RSQ.\n", i);
+ error = 11;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
+ card->rsq.next = card->rsq.base;
+ card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
+ for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
+ ns_rsqe_init(card->rsq.base + j);
+ writel(0x00000000, card->membase + RSQH);
+ writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
+ PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
+
+ /* Initialize SCQ0, the only VBR SCQ used */
+ card->scq1 = (scq_info *) NULL;
+ card->scq2 = (scq_info *) NULL;
+ card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
+ if (card->scq0 == (scq_info *) NULL)
+ {
+ printk("nicstar%d: can't get SCQ0.\n", i);
+ error = 12;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ u32d[0] = (u32) virt_to_bus(card->scq0->base);
+ u32d[1] = (u32) 0x00000000;
+ u32d[2] = (u32) 0xffffffff;
+ u32d[3] = (u32) 0x00000000;
+ ns_write_sram(card, NS_VRSCD0, u32d, 4);
+ ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
+ ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
+ card->scq0->scd = NS_VRSCD0;
+ PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
+
+ /* Initialize TSTs */
+ card->tst_addr = NS_TST0;
+ card->tst_free_entries = NS_TST_NUM_ENTRIES;
+ data = NS_TST_OPCODE_VARIABLE;
+ for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+ ns_write_sram(card, NS_TST0 + j, &data, 1);
+ data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
+ ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
+ for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+ ns_write_sram(card, NS_TST1 + j, &data, 1);
+ data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
+ ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
+ for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+ card->tste2vc[j] = NULL;
+ writel(NS_TST0 << 2, card->membase + TSTB);
+
+
+ /* Initialize RCT. AAL type is set on opening the VC. */
+#ifdef RCQ_SUPPORT
+ u32d[0] = NS_RCTE_RAWCELLINTEN;
+#else
+ u32d[0] = 0x00000000;
+#endif /* RCQ_SUPPORT */
+ u32d[1] = 0x00000000;
+ u32d[2] = 0x00000000;
+ u32d[3] = 0xFFFFFFFF;
+ for (j = 0; j < card->rct_size; j++)
+ ns_write_sram(card, j * 4, u32d, 4);
+
+ memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
+
+ for (j = 0; j < NS_FRSCD_NUM; j++)
+ card->scd2vc[j] = NULL;
+
+ /* Initialize buffer levels */
+ card->sbnr.min = MIN_SB;
+ card->sbnr.init = NUM_SB;
+ card->sbnr.max = MAX_SB;
+ card->lbnr.min = MIN_LB;
+ card->lbnr.init = NUM_LB;
+ card->lbnr.max = MAX_LB;
+ card->iovnr.min = MIN_IOVB;
+ card->iovnr.init = NUM_IOVB;
+ card->iovnr.max = MAX_IOVB;
+ card->hbnr.min = MIN_HB;
+ card->hbnr.init = NUM_HB;
+ card->hbnr.max = MAX_HB;
+
+ card->sm_handle = 0x00000000;
+ card->sm_addr = 0x00000000;
+ card->lg_handle = 0x00000000;
+ card->lg_addr = 0x00000000;
+
+ card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
+
+ /* Pre-allocate some huge buffers */
+ skb_queue_head_init(&card->hbpool.queue);
+ card->hbpool.count = 0;
+ for (j = 0; j < NUM_HB; j++)
+ {
+ struct sk_buff *hb;
+ hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
+ if (hb == NULL)
+ {
+ printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
+ i, j, NUM_HB);
+ error = 13;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ skb_queue_tail(&card->hbpool.queue, hb);
+ card->hbpool.count++;
+ }
+
+
+ /* Allocate large buffers */
+ skb_queue_head_init(&card->lbpool.queue);
+ card->lbpool.count = 0; /* Not used */
+ for (j = 0; j < NUM_LB; j++)
+ {
+ struct sk_buff *lb;
+ lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
+ if (lb == NULL)
+ {
+ printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
+ i, j, NUM_LB);
+ error = 14;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ skb_queue_tail(&card->lbpool.queue, lb);
+ skb_reserve(lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
+ /* Due to the implementation of push_rxbufs() this is 1, not 0 */
+ if (j == 1)
+ {
+ card->rcbuf = lb;
+ card->rawch = (u32) virt_to_bus(lb->data);
+ }
+ }
+ /* Test for strange behaviour which leads to crashes */
+ if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
+ {
+ printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
+ i, j, bcount);
+ error = 14;
+ ns_init_card_error(card, error);
+ return error;
+ }
+
+
+ /* Allocate small buffers */
+ skb_queue_head_init(&card->sbpool.queue);
+ card->sbpool.count = 0; /* Not used */
+ for (j = 0; j < NUM_SB; j++)
+ {
+ struct sk_buff *sb;
+ sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
+ if (sb == NULL)
+ {
+ printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
+ i, j, NUM_SB);
+ error = 15;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ skb_queue_tail(&card->sbpool.queue, sb);
+ skb_reserve(sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
+ }
+ /* Test for strange behaviour which leads to crashes */
+ if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
+ {
+ printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
+ i, j, bcount);
+ error = 15;
+ ns_init_card_error(card, error);
+ return error;
+ }
+
+
+ /* Allocate iovec buffers */
+ skb_queue_head_init(&card->iovpool.queue);
+ card->iovpool.count = 0;
+ for (j = 0; j < NUM_IOVB; j++)
+ {
+ struct sk_buff *iovb;
+ iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
+ if (iovb == NULL)
+ {
+ printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
+ i, j, NUM_IOVB);
+ error = 16;
+ ns_init_card_error(card, error);
+ return error;
+ }
+ skb_queue_tail(&card->iovpool.queue, iovb);
+ card->iovpool.count++;
+ }
+
+ card->intcnt = 0;
+
+ /* Configure NICStAR */
+ if (card->rct_size == 4096)
+ ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
+ else /* (card->rct_size == 16384) */
+ ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
+
+ card->efbie = 1;
+
+ /* Register device */
+ card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
+ if (card->atmdev == NULL)
+ {
+ printk("nicstar%d: can't register device.\n", i);
+ error = 17;
+ ns_init_card_error(card, error);
+ return error;
+ }
+
+ if (ns_parse_mac(mac[i], card->atmdev->esi)) {
+ nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
+ card->atmdev->esi, 6);
+ if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) {
+ nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
+ card->atmdev->esi, 6);
+ }
+ }
+
+ printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i,
+ card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2],
+ card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]);
+
+ card->atmdev->dev_data = card;
+ card->atmdev->ci_range.vpi_bits = card->vpibits;
+ card->atmdev->ci_range.vci_bits = card->vcibits;
+ card->atmdev->link_rate = card->max_pcr;
+ card->atmdev->phy = NULL;
+
+#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
+ if (card->max_pcr == ATM_OC3_PCR)
+ suni_init(card->atmdev);
+#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
+
+#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
+ if (card->max_pcr == ATM_25_PCR)
+ idt77105_init(card->atmdev);
+#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
+
+ if (card->atmdev->phy && card->atmdev->phy->start)
+ card->atmdev->phy->start(card->atmdev);
+
+ writel(NS_CFG_RXPATH |
+ NS_CFG_SMBUFSIZE |
+ NS_CFG_LGBUFSIZE |
+ NS_CFG_EFBIE |
+ NS_CFG_RSQSIZE |
+ NS_CFG_VPIBITS |
+ ns_cfg_rctsize |
+ NS_CFG_RXINT_NODELAY |
+ NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
+ NS_CFG_RSQAFIE |
+ NS_CFG_TXEN |
+ NS_CFG_TXIE |
+ NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
+ NS_CFG_PHYIE,
+ card->membase + CFG);
+
+ num_cards++;
+
+ return error;
+}
+
+
+
+static void __devinit ns_init_card_error(ns_dev *card, int error)
+{
+ if (error >= 17)
+ {
+ writel(0x00000000, card->membase + CFG);
+ }
+ if (error >= 16)
+ {
+ struct sk_buff *iovb;
+ while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
+ dev_kfree_skb_any(iovb);
+ }
+ if (error >= 15)
+ {
+ struct sk_buff *sb;
+ while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
+ dev_kfree_skb_any(sb);
+ free_scq(card->scq0, NULL);
+ }
+ if (error >= 14)
+ {
+ struct sk_buff *lb;
+ while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
+ dev_kfree_skb_any(lb);
+ }
+ if (error >= 13)
+ {
+ struct sk_buff *hb;
+ while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
+ dev_kfree_skb_any(hb);
+ }
+ if (error >= 12)
+ {
+ kfree(card->rsq.org);
+ }
+ if (error >= 11)
+ {
+ kfree(card->tsq.org);
+ }
+ if (error >= 10)
+ {
+ free_irq(card->pcidev->irq, card);
+ }
+ if (error >= 4)
+ {
+ iounmap(card->membase);
+ }
+ if (error >= 3)
+ {
+ pci_disable_device(card->pcidev);
+ kfree(card);
+ }
+}
+
+
+
+static scq_info *get_scq(int size, u32 scd)
+{
+ scq_info *scq;
+ int i;
+
+ if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
+ return (scq_info *) NULL;
+
+ scq = (scq_info *) kmalloc(sizeof(scq_info), GFP_KERNEL);
+ if (scq == (scq_info *) NULL)
+ return (scq_info *) NULL;
+ scq->org = kmalloc(2 * size, GFP_KERNEL);
+ if (scq->org == NULL)
+ {
+ kfree(scq);
+ return (scq_info *) NULL;
+ }
+ scq->skb = (struct sk_buff **) kmalloc(sizeof(struct sk_buff *) *
+ (size / NS_SCQE_SIZE), GFP_KERNEL);
+ if (scq->skb == (struct sk_buff **) NULL)
+ {
+ kfree(scq->org);
+ kfree(scq);
+ return (scq_info *) NULL;
+ }
+ scq->num_entries = size / NS_SCQE_SIZE;
+ scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
+ scq->next = scq->base;
+ scq->last = scq->base + (scq->num_entries - 1);
+ scq->tail = scq->last;
+ scq->scd = scd;
+ scq->num_entries = size / NS_SCQE_SIZE;
+ scq->tbd_count = 0;
+ init_waitqueue_head(&scq->scqfull_waitq);
+ scq->full = 0;
+ spin_lock_init(&scq->lock);
+
+ for (i = 0; i < scq->num_entries; i++)
+ scq->skb[i] = NULL;
+
+ return scq;
+}
+
+
+
+/* For variable rate SCQ vcc must be NULL */
+static void free_scq(scq_info *scq, struct atm_vcc *vcc)
+{
+ int i;
+
+ if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
+ for (i = 0; i < scq->num_entries; i++)
+ {
+ if (scq->skb[i] != NULL)
+ {
+ vcc = ATM_SKB(scq->skb[i])->vcc;
+ if (vcc->pop != NULL)
+ vcc->pop(vcc, scq->skb[i]);
+ else
+ dev_kfree_skb_any(scq->skb[i]);
+ }
+ }
+ else /* vcc must be != NULL */
+ {
+ if (vcc == NULL)
+ {
+ printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
+ for (i = 0; i < scq->num_entries; i++)
+ dev_kfree_skb_any(scq->skb[i]);
+ }
+ else
+ for (i = 0; i < scq->num_entries; i++)
+ {
+ if (scq->skb[i] != NULL)
+ {
+ if (vcc->pop != NULL)
+ vcc->pop(vcc, scq->skb[i]);
+ else
+ dev_kfree_skb_any(scq->skb[i]);
+ }
+ }
+ }
+ kfree(scq->skb);
+ kfree(scq->org);
+ kfree(scq);
+}
+
+
+
+/* The handles passed must be pointers to the sk_buff containing the small
+ or large buffer(s) cast to u32. */
+static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
+ u32 handle2, u32 addr2)
+{
+ u32 stat;
+ unsigned long flags;
+
+
+#ifdef GENERAL_DEBUG
+ if (!addr1)
+ printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
+#endif /* GENERAL_DEBUG */
+
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+ if (type == BUF_SM)
+ {
+ if (!addr2)
+ {
+ if (card->sm_addr)
+ {
+ addr2 = card->sm_addr;
+ handle2 = card->sm_handle;
+ card->sm_addr = 0x00000000;
+ card->sm_handle = 0x00000000;
+ }
+ else /* (!sm_addr) */
+ {
+ card->sm_addr = addr1;
+ card->sm_handle = handle1;
+ }
+ }
+ }
+ else /* type == BUF_LG */
+ {
+ if (!addr2)
+ {
+ if (card->lg_addr)
+ {
+ addr2 = card->lg_addr;
+ handle2 = card->lg_handle;
+ card->lg_addr = 0x00000000;
+ card->lg_handle = 0x00000000;
+ }
+ else /* (!lg_addr) */
+ {
+ card->lg_addr = addr1;
+ card->lg_handle = handle1;
+ }
+ }
+ }
+
+ if (addr2)
+ {
+ if (type == BUF_SM)
+ {
+ if (card->sbfqc >= card->sbnr.max)
+ {
+ skb_unlink((struct sk_buff *) handle1);
+ dev_kfree_skb_any((struct sk_buff *) handle1);
+ skb_unlink((struct sk_buff *) handle2);
+ dev_kfree_skb_any((struct sk_buff *) handle2);
+ return;
+ }
+ else
+ card->sbfqc += 2;
+ }
+ else /* (type == BUF_LG) */
+ {
+ if (card->lbfqc >= card->lbnr.max)
+ {
+ skb_unlink((struct sk_buff *) handle1);
+ dev_kfree_skb_any((struct sk_buff *) handle1);
+ skb_unlink((struct sk_buff *) handle2);
+ dev_kfree_skb_any((struct sk_buff *) handle2);
+ return;
+ }
+ else
+ card->lbfqc += 2;
+ }
+
+ ns_grab_res_lock(card, flags);
+
+ while (CMD_BUSY(card));
+ writel(addr2, card->membase + DR3);
+ writel(handle2, card->membase + DR2);
+ writel(addr1, card->membase + DR1);
+ writel(handle1, card->membase + DR0);
+ writel(NS_CMD_WRITE_FREEBUFQ | (u32) type, card->membase + CMD);
+
+ spin_unlock_irqrestore(&card->res_lock, flags);
+
+ XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
+ (type == BUF_SM ? "small" : "large"), addr1, addr2);
+ }
+
+ if (!card->efbie && card->sbfqc >= card->sbnr.min &&
+ card->lbfqc >= card->lbnr.min)
+ {
+ card->efbie = 1;
+ writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
+ }
+
+ return;
+}
+
+
+
+static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+ u32 stat_r;
+ ns_dev *card;
+ struct atm_dev *dev;
+ unsigned long flags;
+
+ card = (ns_dev *) dev_id;
+ dev = card->atmdev;
+ card->intcnt++;
+
+ PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
+
+ ns_grab_int_lock(card, flags);
+
+ stat_r = readl(card->membase + STAT);
+
+ /* Transmit Status Indicator has been written to T. S. Queue */
+ if (stat_r & NS_STAT_TSIF)
+ {
+ TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
+ process_tsq(card);
+ writel(NS_STAT_TSIF, card->membase + STAT);
+ }
+
+ /* Incomplete CS-PDU has been transmitted */
+ if (stat_r & NS_STAT_TXICP)
+ {
+ writel(NS_STAT_TXICP, card->membase + STAT);
+ TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
+ card->index);
+ }
+
+ /* Transmit Status Queue 7/8 full */
+ if (stat_r & NS_STAT_TSQF)
+ {
+ writel(NS_STAT_TSQF, card->membase + STAT);
+ PRINTK("nicstar%d: TSQ full.\n", card->index);
+ process_tsq(card);
+ }
+
+ /* Timer overflow */
+ if (stat_r & NS_STAT_TMROF)
+ {
+ writel(NS_STAT_TMROF, card->membase + STAT);
+ PRINTK("nicstar%d: Timer overflow.\n", card->index);
+ }
+
+ /* PHY device interrupt signal active */
+ if (stat_r & NS_STAT_PHYI)
+ {
+ writel(NS_STAT_PHYI, card->membase + STAT);
+ PRINTK("nicstar%d: PHY interrupt.\n", card->index);
+ if (dev->phy && dev->phy->interrupt) {
+ dev->phy->interrupt(dev);
+ }
+ }
+
+ /* Small Buffer Queue is full */
+ if (stat_r & NS_STAT_SFBQF)
+ {
+ writel(NS_STAT_SFBQF, card->membase + STAT);
+ printk("nicstar%d: Small free buffer queue is full.\n", card->index);
+ }
+
+ /* Large Buffer Queue is full */
+ if (stat_r & NS_STAT_LFBQF)
+ {
+ writel(NS_STAT_LFBQF, card->membase + STAT);
+ printk("nicstar%d: Large free buffer queue is full.\n", card->index);
+ }
+
+ /* Receive Status Queue is full */
+ if (stat_r & NS_STAT_RSQF)
+ {
+ writel(NS_STAT_RSQF, card->membase + STAT);
+ printk("nicstar%d: RSQ full.\n", card->index);
+ process_rsq(card);
+ }
+
+ /* Complete CS-PDU received */
+ if (stat_r & NS_STAT_EOPDU)
+ {
+ RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
+ process_rsq(card);
+ writel(NS_STAT_EOPDU, card->membase + STAT);
+ }
+
+ /* Raw cell received */
+ if (stat_r & NS_STAT_RAWCF)
+ {
+ writel(NS_STAT_RAWCF, card->membase + STAT);
+#ifndef RCQ_SUPPORT
+ printk("nicstar%d: Raw cell received and no support yet...\n",
+ card->index);
+#endif /* RCQ_SUPPORT */
+ /* NOTE: the following procedure may keep a raw cell pending until the
+ next interrupt. As this preliminary support is only meant to
+ avoid buffer leakage, this is not an issue. */
+ while (readl(card->membase + RAWCT) != card->rawch)
+ {
+ ns_rcqe *rawcell;
+
+ rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
+ if (ns_rcqe_islast(rawcell))
+ {
+ struct sk_buff *oldbuf;
+
+ oldbuf = card->rcbuf;
+ card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
+ card->rawch = (u32) virt_to_bus(card->rcbuf->data);
+ recycle_rx_buf(card, oldbuf);
+ }
+ else
+ card->rawch += NS_RCQE_SIZE;
+ }
+ }
+
+ /* Small buffer queue is empty */
+ if (stat_r & NS_STAT_SFBQE)
+ {
+ int i;
+ struct sk_buff *sb;
+
+ writel(NS_STAT_SFBQE, card->membase + STAT);
+ printk("nicstar%d: Small free buffer queue empty.\n",
+ card->index);
+ for (i = 0; i < card->sbnr.min; i++)
+ {
+ sb = dev_alloc_skb(NS_SMSKBSIZE);
+ if (sb == NULL)
+ {
+ writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
+ card->efbie = 0;
+ break;
+ }
+ skb_queue_tail(&card->sbpool.queue, sb);
+ skb_reserve(sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
+ }
+ card->sbfqc = i;
+ process_rsq(card);
+ }
+
+ /* Large buffer queue empty */
+ if (stat_r & NS_STAT_LFBQE)
+ {
+ int i;
+ struct sk_buff *lb;
+
+ writel(NS_STAT_LFBQE, card->membase + STAT);
+ printk("nicstar%d: Large free buffer queue empty.\n",
+ card->index);
+ for (i = 0; i < card->lbnr.min; i++)
+ {
+ lb = dev_alloc_skb(NS_LGSKBSIZE);
+ if (lb == NULL)
+ {
+ writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
+ card->efbie = 0;
+ break;
+ }
+ skb_queue_tail(&card->lbpool.queue, lb);
+ skb_reserve(lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
+ }
+ card->lbfqc = i;
+ process_rsq(card);
+ }
+
+ /* Receive Status Queue is 7/8 full */
+ if (stat_r & NS_STAT_RSQAF)
+ {
+ writel(NS_STAT_RSQAF, card->membase + STAT);
+ RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
+ process_rsq(card);
+ }
+
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ PRINTK("nicstar%d: end of interrupt service\n", card->index);
+ return IRQ_HANDLED;
+}
+
+
+
+static int ns_open(struct atm_vcc *vcc)
+{
+ ns_dev *card;
+ vc_map *vc;
+ unsigned long tmpl, modl;
+ int tcr, tcra; /* target cell rate, and absolute value */
+ int n = 0; /* Number of entries in the TST. Initialized to remove
+ the compiler warning. */
+ u32 u32d[4];
+ int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
+ warning. How I wish compilers were clever enough to
+ tell which variables can truly be used
+ uninitialized... */
+ int inuse; /* tx or rx vc already in use by another vcc */
+ short vpi = vcc->vpi;
+ int vci = vcc->vci;
+
+ card = (ns_dev *) vcc->dev->dev_data;
+ PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
+ if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
+ {
+ PRINTK("nicstar%d: unsupported AAL.\n", card->index);
+ return -EINVAL;
+ }
+
+ vc = &(card->vcmap[vpi << card->vcibits | vci]);
+ vcc->dev_data = vc;
+
+ inuse = 0;
+ if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
+ inuse = 1;
+ if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
+ inuse += 2;
+ if (inuse)
+ {
+ printk("nicstar%d: %s vci already in use.\n", card->index,
+ inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
+ return -EINVAL;
+ }
+
+ set_bit(ATM_VF_ADDR,&vcc->flags);
+
+ /* NOTE: You are not allowed to modify an open connection's QOS. To change
+ that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
+ needed to do that. */
+ if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
+ {
+ scq_info *scq;
+
+ set_bit(ATM_VF_PARTIAL,&vcc->flags);
+ if (vcc->qos.txtp.traffic_class == ATM_CBR)
+ {
+ /* Check requested cell rate and availability of SCD */
+ if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
+ vcc->qos.txtp.min_pcr == 0)
+ {
+ PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
+ card->index);
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -EINVAL;
+ }
+
+ tcr = atm_pcr_goal(&(vcc->qos.txtp));
+ tcra = tcr >= 0 ? tcr : -tcr;
+
+ PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
+ vcc->qos.txtp.max_pcr);
+
+ tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
+ modl = tmpl % card->max_pcr;
+
+ n = (int)(tmpl / card->max_pcr);
+ if (tcr > 0)
+ {
+ if (modl > 0) n++;
+ }
+ else if (tcr == 0)
+ {
+ if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
+ {
+ PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -EINVAL;
+ }
+ }
+
+ if (n == 0)
+ {
+ printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -EINVAL;
+ }
+
+ if (n > (card->tst_free_entries - NS_TST_RESERVED))
+ {
+ PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -EINVAL;
+ }
+ else
+ card->tst_free_entries -= n;
+
+ XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
+ for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
+ {
+ if (card->scd2vc[frscdi] == NULL)
+ {
+ card->scd2vc[frscdi] = vc;
+ break;
+ }
+ }
+ if (frscdi == NS_FRSCD_NUM)
+ {
+ PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
+ card->tst_free_entries += n;
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -EBUSY;
+ }
+
+ vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
+
+ scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
+ if (scq == (scq_info *) NULL)
+ {
+ PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
+ card->scd2vc[frscdi] = NULL;
+ card->tst_free_entries += n;
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+ return -ENOMEM;
+ }
+ vc->scq = scq;
+ u32d[0] = (u32) virt_to_bus(scq->base);
+ u32d[1] = (u32) 0x00000000;
+ u32d[2] = (u32) 0xffffffff;
+ u32d[3] = (u32) 0x00000000;
+ ns_write_sram(card, vc->cbr_scd, u32d, 4);
+
+ fill_tst(card, n, vc);
+ }
+ else if (vcc->qos.txtp.traffic_class == ATM_UBR)
+ {
+ vc->cbr_scd = 0x00000000;
+ vc->scq = card->scq0;
+ }
+
+ if (vcc->qos.txtp.traffic_class != ATM_NONE)
+ {
+ vc->tx = 1;
+ vc->tx_vcc = vcc;
+ vc->tbd_count = 0;
+ }
+ if (vcc->qos.rxtp.traffic_class != ATM_NONE)
+ {
+ u32 status;
+
+ vc->rx = 1;
+ vc->rx_vcc = vcc;
+ vc->rx_iov = NULL;
+
+ /* Open the connection in hardware */
+ if (vcc->qos.aal == ATM_AAL5)
+ status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
+ else /* vcc->qos.aal == ATM_AAL0 */
+ status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
+#ifdef RCQ_SUPPORT
+ status |= NS_RCTE_RAWCELLINTEN;
+#endif /* RCQ_SUPPORT */
+ ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
+ NS_RCT_ENTRY_SIZE, &status, 1);
+ }
+
+ }
+
+ set_bit(ATM_VF_READY,&vcc->flags);
+ return 0;
+}
+
+
+
+static void ns_close(struct atm_vcc *vcc)
+{
+ vc_map *vc;
+ ns_dev *card;
+ u32 data;
+ int i;
+
+ vc = vcc->dev_data;
+ card = vcc->dev->dev_data;
+ PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
+ (int) vcc->vpi, vcc->vci);
+
+ clear_bit(ATM_VF_READY,&vcc->flags);
+
+ if (vcc->qos.rxtp.traffic_class != ATM_NONE)
+ {
+ u32 addr;
+ unsigned long flags;
+
+ addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
+ ns_grab_res_lock(card, flags);
+ while(CMD_BUSY(card));
+ writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
+ spin_unlock_irqrestore(&card->res_lock, flags);
+
+ vc->rx = 0;
+ if (vc->rx_iov != NULL)
+ {
+ struct sk_buff *iovb;
+ u32 stat;
+
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+
+ PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
+ card->index);
+ iovb = vc->rx_iov;
+ recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ NS_SKB(iovb)->iovcnt = 0;
+ NS_SKB(iovb)->vcc = NULL;
+ ns_grab_int_lock(card, flags);
+ recycle_iov_buf(card, iovb);
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ vc->rx_iov = NULL;
+ }
+ }
+
+ if (vcc->qos.txtp.traffic_class != ATM_NONE)
+ {
+ vc->tx = 0;
+ }
+
+ if (vcc->qos.txtp.traffic_class == ATM_CBR)
+ {
+ unsigned long flags;
+ ns_scqe *scqep;
+ scq_info *scq;
+
+ scq = vc->scq;
+
+ for (;;)
+ {
+ ns_grab_scq_lock(card, scq, flags);
+ scqep = scq->next;
+ if (scqep == scq->base)
+ scqep = scq->last;
+ else
+ scqep--;
+ if (scqep == scq->tail)
+ {
+ spin_unlock_irqrestore(&scq->lock, flags);
+ break;
+ }
+ /* If the last entry is not a TSR, place one in the SCQ in order to
+ be able to completely drain it and then close. */
+ if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
+ {
+ ns_scqe tsr;
+ u32 scdi, scqi;
+ u32 data;
+ int index;
+
+ tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
+ scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
+ scqi = scq->next - scq->base;
+ tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
+ tsr.word_3 = 0x00000000;
+ tsr.word_4 = 0x00000000;
+ *scq->next = tsr;
+ index = (int) scqi;
+ scq->skb[index] = NULL;
+ if (scq->next == scq->last)
+ scq->next = scq->base;
+ else
+ scq->next++;
+ data = (u32) virt_to_bus(scq->next);
+ ns_write_sram(card, scq->scd, &data, 1);
+ }
+ spin_unlock_irqrestore(&scq->lock, flags);
+ schedule();
+ }
+
+ /* Free all TST entries */
+ data = NS_TST_OPCODE_VARIABLE;
+ for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
+ {
+ if (card->tste2vc[i] == vc)
+ {
+ ns_write_sram(card, card->tst_addr + i, &data, 1);
+ card->tste2vc[i] = NULL;
+ card->tst_free_entries++;
+ }
+ }
+
+ card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
+ free_scq(vc->scq, vcc);
+ }
+
+ /* remove all references to vcc before deleting it */
+ if (vcc->qos.txtp.traffic_class != ATM_NONE)
+ {
+ unsigned long flags;
+ scq_info *scq = card->scq0;
+
+ ns_grab_scq_lock(card, scq, flags);
+
+ for(i = 0; i < scq->num_entries; i++) {
+ if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
+ ATM_SKB(scq->skb[i])->vcc = NULL;
+ atm_return(vcc, scq->skb[i]->truesize);
+ PRINTK("nicstar: deleted pending vcc mapping\n");
+ }
+ }
+
+ spin_unlock_irqrestore(&scq->lock, flags);
+ }
+
+ vcc->dev_data = NULL;
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ clear_bit(ATM_VF_ADDR,&vcc->flags);
+
+#ifdef RX_DEBUG
+ {
+ u32 stat, cfg;
+ stat = readl(card->membase + STAT);
+ cfg = readl(card->membase + CFG);
+ printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
+ printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
+ (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
+ readl(card->membase + TSQT));
+ printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
+ (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
+ readl(card->membase + RSQT));
+ printk("Empty free buffer queue interrupt %s \n",
+ card->efbie ? "enabled" : "disabled");
+ printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
+ ns_stat_sfbqc_get(stat), card->sbpool.count,
+ ns_stat_lfbqc_get(stat), card->lbpool.count);
+ printk("hbpool.count = %d iovpool.count = %d \n",
+ card->hbpool.count, card->iovpool.count);
+ }
+#endif /* RX_DEBUG */
+}
+
+
+
+static void fill_tst(ns_dev *card, int n, vc_map *vc)
+{
+ u32 new_tst;
+ unsigned long cl;
+ int e, r;
+ u32 data;
+
+ /* It would be very complicated to keep the two TSTs synchronized while
+ assuring that writes are only made to the inactive TST. So, for now I
+ will use only one TST. If problems occur, I will change this again */
+
+ new_tst = card->tst_addr;
+
+ /* Fill procedure */
+
+ for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
+ {
+ if (card->tste2vc[e] == NULL)
+ break;
+ }
+ if (e == NS_TST_NUM_ENTRIES) {
+ printk("nicstar%d: No free TST entries found. \n", card->index);
+ return;
+ }
+
+ r = n;
+ cl = NS_TST_NUM_ENTRIES;
+ data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
+
+ while (r > 0)
+ {
+ if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
+ {
+ card->tste2vc[e] = vc;
+ ns_write_sram(card, new_tst + e, &data, 1);
+ cl -= NS_TST_NUM_ENTRIES;
+ r--;
+ }
+
+ if (++e == NS_TST_NUM_ENTRIES) {
+ e = 0;
+ }
+ cl += n;
+ }
+
+ /* End of fill procedure */
+
+ data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
+ ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
+ ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
+ card->tst_addr = new_tst;
+}
+
+
+
+static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ ns_dev *card;
+ vc_map *vc;
+ scq_info *scq;
+ unsigned long buflen;
+ ns_scqe scqe;
+ u32 flags; /* TBD flags, not CPU flags */
+
+ card = vcc->dev->dev_data;
+ TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
+ if ((vc = (vc_map *) vcc->dev_data) == NULL)
+ {
+ printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
+ atomic_inc(&vcc->stats->tx_err);
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ if (!vc->tx)
+ {
+ printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
+ atomic_inc(&vcc->stats->tx_err);
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
+ {
+ printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
+ atomic_inc(&vcc->stats->tx_err);
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ if (skb_shinfo(skb)->nr_frags != 0)
+ {
+ printk("nicstar%d: No scatter-gather yet.\n", card->index);
+ atomic_inc(&vcc->stats->tx_err);
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ ATM_SKB(skb)->vcc = vcc;
+
+ if (vcc->qos.aal == ATM_AAL5)
+ {
+ buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
+ flags = NS_TBD_AAL5;
+ scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
+ scqe.word_3 = cpu_to_le32((u32) skb->len);
+ scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
+ ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
+ flags |= NS_TBD_EOPDU;
+ }
+ else /* (vcc->qos.aal == ATM_AAL0) */
+ {
+ buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
+ flags = NS_TBD_AAL0;
+ scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
+ scqe.word_3 = cpu_to_le32(0x00000000);
+ if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
+ flags |= NS_TBD_EOPDU;
+ scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
+ /* Force the VPI/VCI to be the same as in VCC struct */
+ scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
+ ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
+ NS_TBD_VC_MASK);
+ }
+
+ if (vcc->qos.txtp.traffic_class == ATM_CBR)
+ {
+ scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
+ scq = ((vc_map *) vcc->dev_data)->scq;
+ }
+ else
+ {
+ scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
+ scq = card->scq0;
+ }
+
+ if (push_scqe(card, vc, scq, &scqe, skb) != 0)
+ {
+ atomic_inc(&vcc->stats->tx_err);
+ dev_kfree_skb_any(skb);
+ return -EIO;
+ }
+ atomic_inc(&vcc->stats->tx);
+
+ return 0;
+}
+
+
+
+static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
+ struct sk_buff *skb)
+{
+ unsigned long flags;
+ ns_scqe tsr;
+ u32 scdi, scqi;
+ int scq_is_vbr;
+ u32 data;
+ int index;
+
+ ns_grab_scq_lock(card, scq, flags);
+ while (scq->tail == scq->next)
+ {
+ if (in_interrupt()) {
+ spin_unlock_irqrestore(&scq->lock, flags);
+ printk("nicstar%d: Error pushing TBD.\n", card->index);
+ return 1;
+ }
+
+ scq->full = 1;
+ spin_unlock_irqrestore(&scq->lock, flags);
+ interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
+ ns_grab_scq_lock(card, scq, flags);
+
+ if (scq->full) {
+ spin_unlock_irqrestore(&scq->lock, flags);
+ printk("nicstar%d: Timeout pushing TBD.\n", card->index);
+ return 1;
+ }
+ }
+ *scq->next = *tbd;
+ index = (int) (scq->next - scq->base);
+ scq->skb[index] = skb;
+ XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
+ card->index, (u32) skb, index);
+ XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
+ card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
+ le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
+ (u32) scq->next);
+ if (scq->next == scq->last)
+ scq->next = scq->base;
+ else
+ scq->next++;
+
+ vc->tbd_count++;
+ if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
+ {
+ scq->tbd_count++;
+ scq_is_vbr = 1;
+ }
+ else
+ scq_is_vbr = 0;
+
+ if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
+ {
+ int has_run = 0;
+
+ while (scq->tail == scq->next)
+ {
+ if (in_interrupt()) {
+ data = (u32) virt_to_bus(scq->next);
+ ns_write_sram(card, scq->scd, &data, 1);
+ spin_unlock_irqrestore(&scq->lock, flags);
+ printk("nicstar%d: Error pushing TSR.\n", card->index);
+ return 0;
+ }
+
+ scq->full = 1;
+ if (has_run++) break;
+ spin_unlock_irqrestore(&scq->lock, flags);
+ interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
+ ns_grab_scq_lock(card, scq, flags);
+ }
+
+ if (!scq->full)
+ {
+ tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
+ if (scq_is_vbr)
+ scdi = NS_TSR_SCDISVBR;
+ else
+ scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
+ scqi = scq->next - scq->base;
+ tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
+ tsr.word_3 = 0x00000000;
+ tsr.word_4 = 0x00000000;
+
+ *scq->next = tsr;
+ index = (int) scqi;
+ scq->skb[index] = NULL;
+ XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
+ card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
+ le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
+ (u32) scq->next);
+ if (scq->next == scq->last)
+ scq->next = scq->base;
+ else
+ scq->next++;
+ vc->tbd_count = 0;
+ scq->tbd_count = 0;
+ }
+ else
+ PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
+ }
+ data = (u32) virt_to_bus(scq->next);
+ ns_write_sram(card, scq->scd, &data, 1);
+
+ spin_unlock_irqrestore(&scq->lock, flags);
+
+ return 0;
+}
+
+
+
+static void process_tsq(ns_dev *card)
+{
+ u32 scdi;
+ scq_info *scq;
+ ns_tsi *previous = NULL, *one_ahead, *two_ahead;
+ int serviced_entries; /* flag indicating at least on entry was serviced */
+
+ serviced_entries = 0;
+
+ if (card->tsq.next == card->tsq.last)
+ one_ahead = card->tsq.base;
+ else
+ one_ahead = card->tsq.next + 1;
+
+ if (one_ahead == card->tsq.last)
+ two_ahead = card->tsq.base;
+ else
+ two_ahead = one_ahead + 1;
+
+ while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
+ !ns_tsi_isempty(two_ahead))
+ /* At most two empty, as stated in the 77201 errata */
+ {
+ serviced_entries = 1;
+
+ /* Skip the one or two possible empty entries */
+ while (ns_tsi_isempty(card->tsq.next)) {
+ if (card->tsq.next == card->tsq.last)
+ card->tsq.next = card->tsq.base;
+ else
+ card->tsq.next++;
+ }
+
+ if (!ns_tsi_tmrof(card->tsq.next))
+ {
+ scdi = ns_tsi_getscdindex(card->tsq.next);
+ if (scdi == NS_TSI_SCDISVBR)
+ scq = card->scq0;
+ else
+ {
+ if (card->scd2vc[scdi] == NULL)
+ {
+ printk("nicstar%d: could not find VC from SCD index.\n",
+ card->index);
+ ns_tsi_init(card->tsq.next);
+ return;
+ }
+ scq = card->scd2vc[scdi]->scq;
+ }
+ drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
+ scq->full = 0;
+ wake_up_interruptible(&(scq->scqfull_waitq));
+ }
+
+ ns_tsi_init(card->tsq.next);
+ previous = card->tsq.next;
+ if (card->tsq.next == card->tsq.last)
+ card->tsq.next = card->tsq.base;
+ else
+ card->tsq.next++;
+
+ if (card->tsq.next == card->tsq.last)
+ one_ahead = card->tsq.base;
+ else
+ one_ahead = card->tsq.next + 1;
+
+ if (one_ahead == card->tsq.last)
+ two_ahead = card->tsq.base;
+ else
+ two_ahead = one_ahead + 1;
+ }
+
+ if (serviced_entries) {
+ writel((((u32) previous) - ((u32) card->tsq.base)),
+ card->membase + TSQH);
+ }
+}
+
+
+
+static void drain_scq(ns_dev *card, scq_info *scq, int pos)
+{
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int i;
+ unsigned long flags;
+
+ XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
+ card->index, (u32) scq, pos);
+ if (pos >= scq->num_entries)
+ {
+ printk("nicstar%d: Bad index on drain_scq().\n", card->index);
+ return;
+ }
+
+ ns_grab_scq_lock(card, scq, flags);
+ i = (int) (scq->tail - scq->base);
+ if (++i == scq->num_entries)
+ i = 0;
+ while (i != pos)
+ {
+ skb = scq->skb[i];
+ XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
+ card->index, (u32) skb, i);
+ if (skb != NULL)
+ {
+ vcc = ATM_SKB(skb)->vcc;
+ if (vcc && vcc->pop != NULL) {
+ vcc->pop(vcc, skb);
+ } else {
+ dev_kfree_skb_irq(skb);
+ }
+ scq->skb[i] = NULL;
+ }
+ if (++i == scq->num_entries)
+ i = 0;
+ }
+ scq->tail = scq->base + pos;
+ spin_unlock_irqrestore(&scq->lock, flags);
+}
+
+
+
+static void process_rsq(ns_dev *card)
+{
+ ns_rsqe *previous;
+
+ if (!ns_rsqe_valid(card->rsq.next))
+ return;
+ while (ns_rsqe_valid(card->rsq.next))
+ {
+ dequeue_rx(card, card->rsq.next);
+ ns_rsqe_init(card->rsq.next);
+ previous = card->rsq.next;
+ if (card->rsq.next == card->rsq.last)
+ card->rsq.next = card->rsq.base;
+ else
+ card->rsq.next++;
+ }
+ writel((((u32) previous) - ((u32) card->rsq.base)),
+ card->membase + RSQH);
+}
+
+
+
+static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
+{
+ u32 vpi, vci;
+ vc_map *vc;
+ struct sk_buff *iovb;
+ struct iovec *iov;
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ unsigned short aal5_len;
+ int len;
+ u32 stat;
+
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+
+ skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
+ vpi = ns_rsqe_vpi(rsqe);
+ vci = ns_rsqe_vci(rsqe);
+ if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
+ {
+ printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
+ card->index, vpi, vci);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ vc = &(card->vcmap[vpi << card->vcibits | vci]);
+ if (!vc->rx)
+ {
+ RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
+ card->index, vpi, vci);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ vcc = vc->rx_vcc;
+
+ if (vcc->qos.aal == ATM_AAL0)
+ {
+ struct sk_buff *sb;
+ unsigned char *cell;
+ int i;
+
+ cell = skb->data;
+ for (i = ns_rsqe_cellcount(rsqe); i; i--)
+ {
+ if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
+ {
+ printk("nicstar%d: Can't allocate buffers for aal0.\n",
+ card->index);
+ atomic_add(i,&vcc->stats->rx_drop);
+ break;
+ }
+ if (!atm_charge(vcc, sb->truesize))
+ {
+ RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
+ card->index);
+ atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
+ dev_kfree_skb_any(sb);
+ break;
+ }
+ /* Rebuild the header */
+ *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
+ (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
+ if (i == 1 && ns_rsqe_eopdu(rsqe))
+ *((u32 *) sb->data) |= 0x00000002;
+ skb_put(sb, NS_AAL0_HEADER);
+ memcpy(sb->tail, cell, ATM_CELL_PAYLOAD);
+ skb_put(sb, ATM_CELL_PAYLOAD);
+ ATM_SKB(sb)->vcc = vcc;
+ do_gettimeofday(&sb->stamp);
+ vcc->push(vcc, sb);
+ atomic_inc(&vcc->stats->rx);
+ cell += ATM_CELL_PAYLOAD;
+ }
+
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ /* To reach this point, the AAL layer can only be AAL5 */
+
+ if ((iovb = vc->rx_iov) == NULL)
+ {
+ iovb = skb_dequeue(&(card->iovpool.queue));
+ if (iovb == NULL) /* No buffers in the queue */
+ {
+ iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
+ if (iovb == NULL)
+ {
+ printk("nicstar%d: Out of iovec buffers.\n", card->index);
+ atomic_inc(&vcc->stats->rx_drop);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+ }
+ else
+ if (--card->iovpool.count < card->iovnr.min)
+ {
+ struct sk_buff *new_iovb;
+ if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
+ {
+ skb_queue_tail(&card->iovpool.queue, new_iovb);
+ card->iovpool.count++;
+ }
+ }
+ vc->rx_iov = iovb;
+ NS_SKB(iovb)->iovcnt = 0;
+ iovb->len = 0;
+ iovb->tail = iovb->data = iovb->head;
+ NS_SKB(iovb)->vcc = vcc;
+ /* IMPORTANT: a pointer to the sk_buff containing the small or large
+ buffer is stored as iovec base, NOT a pointer to the
+ small or large buffer itself. */
+ }
+ else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
+ {
+ printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
+ NS_SKB(iovb)->iovcnt = 0;
+ iovb->len = 0;
+ iovb->tail = iovb->data = iovb->head;
+ NS_SKB(iovb)->vcc = vcc;
+ }
+ iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
+ iov->iov_base = (void *) skb;
+ iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
+ iovb->len += iov->iov_len;
+
+ if (NS_SKB(iovb)->iovcnt == 1)
+ {
+ if (skb->list != &card->sbpool.queue)
+ {
+ printk("nicstar%d: Expected a small buffer, and this is not one.\n",
+ card->index);
+ which_list(card, skb);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_rx_buf(card, skb);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+ }
+ else /* NS_SKB(iovb)->iovcnt >= 2 */
+ {
+ if (skb->list != &card->lbpool.queue)
+ {
+ printk("nicstar%d: Expected a large buffer, and this is not one.\n",
+ card->index);
+ which_list(card, skb);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+ }
+
+ if (ns_rsqe_eopdu(rsqe))
+ {
+ /* This works correctly regardless of the endianness of the host */
+ unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
+ iov->iov_len - 6);
+ aal5_len = L1L2[0] << 8 | L1L2[1];
+ len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
+ if (ns_rsqe_crcerr(rsqe) ||
+ len + 8 > iovb->len || len + (47 + 8) < iovb->len)
+ {
+ printk("nicstar%d: AAL5 CRC error", card->index);
+ if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
+ printk(" - PDU size mismatch.\n");
+ else
+ printk(".\n");
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+
+ /* By this point we (hopefully) have a complete SDU without errors. */
+
+ if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
+ {
+ /* skb points to a small buffer */
+ if (!atm_charge(vcc, skb->truesize))
+ {
+ push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
+ 0, 0);
+ atomic_inc(&vcc->stats->rx_drop);
+ }
+ else
+ {
+ skb_put(skb, len);
+ dequeue_sm_buf(card, skb);
+#ifdef NS_USE_DESTRUCTORS
+ skb->destructor = ns_sb_destructor;
+#endif /* NS_USE_DESTRUCTORS */
+ ATM_SKB(skb)->vcc = vcc;
+ do_gettimeofday(&skb->stamp);
+ vcc->push(vcc, skb);
+ atomic_inc(&vcc->stats->rx);
+ }
+ }
+ else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
+ {
+ struct sk_buff *sb;
+
+ sb = (struct sk_buff *) (iov - 1)->iov_base;
+ /* skb points to a large buffer */
+
+ if (len <= NS_SMBUFSIZE)
+ {
+ if (!atm_charge(vcc, sb->truesize))
+ {
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
+ 0, 0);
+ atomic_inc(&vcc->stats->rx_drop);
+ }
+ else
+ {
+ skb_put(sb, len);
+ dequeue_sm_buf(card, sb);
+#ifdef NS_USE_DESTRUCTORS
+ sb->destructor = ns_sb_destructor;
+#endif /* NS_USE_DESTRUCTORS */
+ ATM_SKB(sb)->vcc = vcc;
+ do_gettimeofday(&sb->stamp);
+ vcc->push(vcc, sb);
+ atomic_inc(&vcc->stats->rx);
+ }
+
+ push_rxbufs(card, BUF_LG, (u32) skb,
+ (u32) virt_to_bus(skb->data), 0, 0);
+
+ }
+ else /* len > NS_SMBUFSIZE, the usual case */
+ {
+ if (!atm_charge(vcc, skb->truesize))
+ {
+ push_rxbufs(card, BUF_LG, (u32) skb,
+ (u32) virt_to_bus(skb->data), 0, 0);
+ atomic_inc(&vcc->stats->rx_drop);
+ }
+ else
+ {
+ dequeue_lg_buf(card, skb);
+#ifdef NS_USE_DESTRUCTORS
+ skb->destructor = ns_lb_destructor;
+#endif /* NS_USE_DESTRUCTORS */
+ skb_push(skb, NS_SMBUFSIZE);
+ memcpy(skb->data, sb->data, NS_SMBUFSIZE);
+ skb_put(skb, len - NS_SMBUFSIZE);
+ ATM_SKB(skb)->vcc = vcc;
+ do_gettimeofday(&skb->stamp);
+ vcc->push(vcc, skb);
+ atomic_inc(&vcc->stats->rx);
+ }
+
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
+ 0, 0);
+
+ }
+
+ }
+ else /* Must push a huge buffer */
+ {
+ struct sk_buff *hb, *sb, *lb;
+ int remaining, tocopy;
+ int j;
+
+ hb = skb_dequeue(&(card->hbpool.queue));
+ if (hb == NULL) /* No buffers in the queue */
+ {
+
+ hb = dev_alloc_skb(NS_HBUFSIZE);
+ if (hb == NULL)
+ {
+ printk("nicstar%d: Out of huge buffers.\n", card->index);
+ atomic_inc(&vcc->stats->rx_drop);
+ recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+ else if (card->hbpool.count < card->hbnr.min)
+ {
+ struct sk_buff *new_hb;
+ if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->hbpool.queue, new_hb);
+ card->hbpool.count++;
+ }
+ }
+ }
+ else
+ if (--card->hbpool.count < card->hbnr.min)
+ {
+ struct sk_buff *new_hb;
+ if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->hbpool.queue, new_hb);
+ card->hbpool.count++;
+ }
+ if (card->hbpool.count < card->hbnr.min)
+ {
+ if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->hbpool.queue, new_hb);
+ card->hbpool.count++;
+ }
+ }
+ }
+
+ iov = (struct iovec *) iovb->data;
+
+ if (!atm_charge(vcc, hb->truesize))
+ {
+ recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
+ if (card->hbpool.count < card->hbnr.max)
+ {
+ skb_queue_tail(&card->hbpool.queue, hb);
+ card->hbpool.count++;
+ }
+ else
+ dev_kfree_skb_any(hb);
+ atomic_inc(&vcc->stats->rx_drop);
+ }
+ else
+ {
+ /* Copy the small buffer to the huge buffer */
+ sb = (struct sk_buff *) iov->iov_base;
+ memcpy(hb->data, sb->data, iov->iov_len);
+ skb_put(hb, iov->iov_len);
+ remaining = len - iov->iov_len;
+ iov++;
+ /* Free the small buffer */
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
+ 0, 0);
+
+ /* Copy all large buffers to the huge buffer and free them */
+ for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
+ {
+ lb = (struct sk_buff *) iov->iov_base;
+ tocopy = min_t(int, remaining, iov->iov_len);
+ memcpy(hb->tail, lb->data, tocopy);
+ skb_put(hb, tocopy);
+ iov++;
+ remaining -= tocopy;
+ push_rxbufs(card, BUF_LG, (u32) lb,
+ (u32) virt_to_bus(lb->data), 0, 0);
+ }
+#ifdef EXTRA_DEBUG
+ if (remaining != 0 || hb->len != len)
+ printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
+#endif /* EXTRA_DEBUG */
+ ATM_SKB(hb)->vcc = vcc;
+#ifdef NS_USE_DESTRUCTORS
+ hb->destructor = ns_hb_destructor;
+#endif /* NS_USE_DESTRUCTORS */
+ do_gettimeofday(&hb->stamp);
+ vcc->push(vcc, hb);
+ atomic_inc(&vcc->stats->rx);
+ }
+ }
+
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ }
+
+}
+
+
+
+#ifdef NS_USE_DESTRUCTORS
+
+static void ns_sb_destructor(struct sk_buff *sb)
+{
+ ns_dev *card;
+ u32 stat;
+
+ card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+
+ do
+ {
+ sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
+ if (sb == NULL)
+ break;
+ skb_queue_tail(&card->sbpool.queue, sb);
+ skb_reserve(sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
+ } while (card->sbfqc < card->sbnr.min);
+}
+
+
+
+static void ns_lb_destructor(struct sk_buff *lb)
+{
+ ns_dev *card;
+ u32 stat;
+
+ card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+
+ do
+ {
+ lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
+ if (lb == NULL)
+ break;
+ skb_queue_tail(&card->lbpool.queue, lb);
+ skb_reserve(lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
+ } while (card->lbfqc < card->lbnr.min);
+}
+
+
+
+static void ns_hb_destructor(struct sk_buff *hb)
+{
+ ns_dev *card;
+
+ card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
+
+ while (card->hbpool.count < card->hbnr.init)
+ {
+ hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
+ if (hb == NULL)
+ break;
+ skb_queue_tail(&card->hbpool.queue, hb);
+ card->hbpool.count++;
+ }
+}
+
+#endif /* NS_USE_DESTRUCTORS */
+
+
+
+static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
+{
+ if (skb->list == &card->sbpool.queue)
+ push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
+ else if (skb->list == &card->lbpool.queue)
+ push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
+ else
+ {
+ printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+
+
+static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
+{
+ struct sk_buff *skb;
+
+ for (; count > 0; count--)
+ {
+ skb = (struct sk_buff *) (iov++)->iov_base;
+ if (skb->list == &card->sbpool.queue)
+ push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
+ 0, 0);
+ else if (skb->list == &card->lbpool.queue)
+ push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data),
+ 0, 0);
+ else
+ {
+ printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
+ dev_kfree_skb_any(skb);
+ }
+ }
+}
+
+
+
+static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
+{
+ if (card->iovpool.count < card->iovnr.max)
+ {
+ skb_queue_tail(&card->iovpool.queue, iovb);
+ card->iovpool.count++;
+ }
+ else
+ dev_kfree_skb_any(iovb);
+}
+
+
+
+static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
+{
+ skb_unlink(sb);
+#ifdef NS_USE_DESTRUCTORS
+ if (card->sbfqc < card->sbnr.min)
+#else
+ if (card->sbfqc < card->sbnr.init)
+ {
+ struct sk_buff *new_sb;
+ if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->sbpool.queue, new_sb);
+ skb_reserve(new_sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) new_sb,
+ (u32) virt_to_bus(new_sb->data), 0, 0);
+ }
+ }
+ if (card->sbfqc < card->sbnr.init)
+#endif /* NS_USE_DESTRUCTORS */
+ {
+ struct sk_buff *new_sb;
+ if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->sbpool.queue, new_sb);
+ skb_reserve(new_sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) new_sb,
+ (u32) virt_to_bus(new_sb->data), 0, 0);
+ }
+ }
+}
+
+
+
+static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
+{
+ skb_unlink(lb);
+#ifdef NS_USE_DESTRUCTORS
+ if (card->lbfqc < card->lbnr.min)
+#else
+ if (card->lbfqc < card->lbnr.init)
+ {
+ struct sk_buff *new_lb;
+ if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->lbpool.queue, new_lb);
+ skb_reserve(new_lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) new_lb,
+ (u32) virt_to_bus(new_lb->data), 0, 0);
+ }
+ }
+ if (card->lbfqc < card->lbnr.init)
+#endif /* NS_USE_DESTRUCTORS */
+ {
+ struct sk_buff *new_lb;
+ if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
+ {
+ skb_queue_tail(&card->lbpool.queue, new_lb);
+ skb_reserve(new_lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) new_lb,
+ (u32) virt_to_bus(new_lb->data), 0, 0);
+ }
+ }
+}
+
+
+
+static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
+{
+ u32 stat;
+ ns_dev *card;
+ int left;
+
+ left = (int) *pos;
+ card = (ns_dev *) dev->dev_data;
+ stat = readl(card->membase + STAT);
+ if (!left--)
+ return sprintf(page, "Pool count min init max \n");
+ if (!left--)
+ return sprintf(page, "Small %5d %5d %5d %5d \n",
+ ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
+ card->sbnr.max);
+ if (!left--)
+ return sprintf(page, "Large %5d %5d %5d %5d \n",
+ ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
+ card->lbnr.max);
+ if (!left--)
+ return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
+ card->hbnr.min, card->hbnr.init, card->hbnr.max);
+ if (!left--)
+ return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
+ card->iovnr.min, card->iovnr.init, card->iovnr.max);
+ if (!left--)
+ {
+ int retval;
+ retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
+ card->intcnt = 0;
+ return retval;
+ }
+#if 0
+ /* Dump 25.6 Mbps PHY registers */
+ /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
+ here just in case it's needed for debugging. */
+ if (card->max_pcr == ATM_25_PCR && !left--)
+ {
+ u32 phy_regs[4];
+ u32 i;
+
+ for (i = 0; i < 4; i++)
+ {
+ while (CMD_BUSY(card));
+ writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
+ while (CMD_BUSY(card));
+ phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
+ }
+
+ return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
+ phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
+ }
+#endif /* 0 - Dump 25.6 Mbps PHY registers */
+#if 0
+ /* Dump TST */
+ if (left-- < NS_TST_NUM_ENTRIES)
+ {
+ if (card->tste2vc[left + 1] == NULL)
+ return sprintf(page, "%5d - VBR/UBR \n", left + 1);
+ else
+ return sprintf(page, "%5d - %d %d \n", left + 1,
+ card->tste2vc[left + 1]->tx_vcc->vpi,
+ card->tste2vc[left + 1]->tx_vcc->vci);
+ }
+#endif /* 0 */
+ return 0;
+}
+
+
+
+static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
+{
+ ns_dev *card;
+ pool_levels pl;
+ int btype;
+ unsigned long flags;
+
+ card = dev->dev_data;
+ switch (cmd)
+ {
+ case NS_GETPSTAT:
+ if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
+ return -EFAULT;
+ switch (pl.buftype)
+ {
+ case NS_BUFTYPE_SMALL:
+ pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
+ pl.level.min = card->sbnr.min;
+ pl.level.init = card->sbnr.init;
+ pl.level.max = card->sbnr.max;
+ break;
+
+ case NS_BUFTYPE_LARGE:
+ pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
+ pl.level.min = card->lbnr.min;
+ pl.level.init = card->lbnr.init;
+ pl.level.max = card->lbnr.max;
+ break;
+
+ case NS_BUFTYPE_HUGE:
+ pl.count = card->hbpool.count;
+ pl.level.min = card->hbnr.min;
+ pl.level.init = card->hbnr.init;
+ pl.level.max = card->hbnr.max;
+ break;
+
+ case NS_BUFTYPE_IOVEC:
+ pl.count = card->iovpool.count;
+ pl.level.min = card->iovnr.min;
+ pl.level.init = card->iovnr.init;
+ pl.level.max = card->iovnr.max;
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+
+ }
+ if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
+ return (sizeof(pl));
+ else
+ return -EFAULT;
+
+ case NS_SETBUFLEV:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
+ return -EFAULT;
+ if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
+ return -EINVAL;
+ if (pl.level.min == 0)
+ return -EINVAL;
+ switch (pl.buftype)
+ {
+ case NS_BUFTYPE_SMALL:
+ if (pl.level.max > TOP_SB)
+ return -EINVAL;
+ card->sbnr.min = pl.level.min;
+ card->sbnr.init = pl.level.init;
+ card->sbnr.max = pl.level.max;
+ break;
+
+ case NS_BUFTYPE_LARGE:
+ if (pl.level.max > TOP_LB)
+ return -EINVAL;
+ card->lbnr.min = pl.level.min;
+ card->lbnr.init = pl.level.init;
+ card->lbnr.max = pl.level.max;
+ break;
+
+ case NS_BUFTYPE_HUGE:
+ if (pl.level.max > TOP_HB)
+ return -EINVAL;
+ card->hbnr.min = pl.level.min;
+ card->hbnr.init = pl.level.init;
+ card->hbnr.max = pl.level.max;
+ break;
+
+ case NS_BUFTYPE_IOVEC:
+ if (pl.level.max > TOP_IOVB)
+ return -EINVAL;
+ card->iovnr.min = pl.level.min;
+ card->iovnr.init = pl.level.init;
+ card->iovnr.max = pl.level.max;
+ break;
+
+ default:
+ return -EINVAL;
+
+ }
+ return 0;
+
+ case NS_ADJBUFLEV:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ btype = (int) arg; /* an int is the same size as a pointer */
+ switch (btype)
+ {
+ case NS_BUFTYPE_SMALL:
+ while (card->sbfqc < card->sbnr.init)
+ {
+ struct sk_buff *sb;
+
+ sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
+ if (sb == NULL)
+ return -ENOMEM;
+ skb_queue_tail(&card->sbpool.queue, sb);
+ skb_reserve(sb, NS_AAL0_HEADER);
+ push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
+ }
+ break;
+
+ case NS_BUFTYPE_LARGE:
+ while (card->lbfqc < card->lbnr.init)
+ {
+ struct sk_buff *lb;
+
+ lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
+ if (lb == NULL)
+ return -ENOMEM;
+ skb_queue_tail(&card->lbpool.queue, lb);
+ skb_reserve(lb, NS_SMBUFSIZE);
+ push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
+ }
+ break;
+
+ case NS_BUFTYPE_HUGE:
+ while (card->hbpool.count > card->hbnr.init)
+ {
+ struct sk_buff *hb;
+
+ ns_grab_int_lock(card, flags);
+ hb = skb_dequeue(&card->hbpool.queue);
+ card->hbpool.count--;
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ if (hb == NULL)
+ printk("nicstar%d: huge buffer count inconsistent.\n",
+ card->index);
+ else
+ dev_kfree_skb_any(hb);
+
+ }
+ while (card->hbpool.count < card->hbnr.init)
+ {
+ struct sk_buff *hb;
+
+ hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
+ if (hb == NULL)
+ return -ENOMEM;
+ ns_grab_int_lock(card, flags);
+ skb_queue_tail(&card->hbpool.queue, hb);
+ card->hbpool.count++;
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ }
+ break;
+
+ case NS_BUFTYPE_IOVEC:
+ while (card->iovpool.count > card->iovnr.init)
+ {
+ struct sk_buff *iovb;
+
+ ns_grab_int_lock(card, flags);
+ iovb = skb_dequeue(&card->iovpool.queue);
+ card->iovpool.count--;
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ if (iovb == NULL)
+ printk("nicstar%d: iovec buffer count inconsistent.\n",
+ card->index);
+ else
+ dev_kfree_skb_any(iovb);
+
+ }
+ while (card->iovpool.count < card->iovnr.init)
+ {
+ struct sk_buff *iovb;
+
+ iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
+ if (iovb == NULL)
+ return -ENOMEM;
+ ns_grab_int_lock(card, flags);
+ skb_queue_tail(&card->iovpool.queue, iovb);
+ card->iovpool.count++;
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ }
+ break;
+
+ default:
+ return -EINVAL;
+
+ }
+ return 0;
+
+ default:
+ if (dev->phy && dev->phy->ioctl) {
+ return dev->phy->ioctl(dev, cmd, arg);
+ }
+ else {
+ printk("nicstar%d: %s == NULL \n", card->index,
+ dev->phy ? "dev->phy->ioctl" : "dev->phy");
+ return -ENOIOCTLCMD;
+ }
+ }
+}
+
+
+
+static void which_list(ns_dev *card, struct sk_buff *skb)
+{
+ printk("It's a %s buffer.\n", skb->list == &card->sbpool.queue ?
+ "small" : skb->list == &card->lbpool.queue ? "large" :
+ skb->list == &card->hbpool.queue ? "huge" :
+ skb->list == &card->iovpool.queue ? "iovec" : "unknown");
+}
+
+
+
+static void ns_poll(unsigned long arg)
+{
+ int i;
+ ns_dev *card;
+ unsigned long flags;
+ u32 stat_r, stat_w;
+
+ PRINTK("nicstar: Entering ns_poll().\n");
+ for (i = 0; i < num_cards; i++)
+ {
+ card = cards[i];
+ if (spin_is_locked(&card->int_lock)) {
+ /* Probably it isn't worth spinning */
+ continue;
+ }
+ ns_grab_int_lock(card, flags);
+
+ stat_w = 0;
+ stat_r = readl(card->membase + STAT);
+ if (stat_r & NS_STAT_TSIF)
+ stat_w |= NS_STAT_TSIF;
+ if (stat_r & NS_STAT_EOPDU)
+ stat_w |= NS_STAT_EOPDU;
+
+ process_tsq(card);
+ process_rsq(card);
+
+ writel(stat_w, card->membase + STAT);
+ spin_unlock_irqrestore(&card->int_lock, flags);
+ }
+ mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
+ PRINTK("nicstar: Leaving ns_poll().\n");
+}
+
+
+
+static int ns_parse_mac(char *mac, unsigned char *esi)
+{
+ int i, j;
+ short byte1, byte0;
+
+ if (mac == NULL || esi == NULL)
+ return -1;
+ j = 0;
+ for (i = 0; i < 6; i++)
+ {
+ if ((byte1 = ns_h2i(mac[j++])) < 0)
+ return -1;
+ if ((byte0 = ns_h2i(mac[j++])) < 0)
+ return -1;
+ esi[i] = (unsigned char) (byte1 * 16 + byte0);
+ if (i < 5)
+ {
+ if (mac[j++] != ':')
+ return -1;
+ }
+ }
+ return 0;
+}
+
+
+
+static short ns_h2i(char c)
+{
+ if (c >= '0' && c <= '9')
+ return (short) (c - '0');
+ if (c >= 'A' && c <= 'F')
+ return (short) (c - 'A' + 10);
+ if (c >= 'a' && c <= 'f')
+ return (short) (c - 'a' + 10);
+ return -1;
+}
+
+
+
+static void ns_phy_put(struct atm_dev *dev, unsigned char value,
+ unsigned long addr)
+{
+ ns_dev *card;
+ unsigned long flags;
+
+ card = dev->dev_data;
+ ns_grab_res_lock(card, flags);
+ while(CMD_BUSY(card));
+ writel((unsigned long) value, card->membase + DR0);
+ writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
+ card->membase + CMD);
+ spin_unlock_irqrestore(&card->res_lock, flags);
+}
+
+
+
+static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
+{
+ ns_dev *card;
+ unsigned long flags;
+ unsigned long data;
+
+ card = dev->dev_data;
+ ns_grab_res_lock(card, flags);
+ while(CMD_BUSY(card));
+ writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
+ card->membase + CMD);
+ while(CMD_BUSY(card));
+ data = readl(card->membase + DR0) & 0x000000FF;
+ spin_unlock_irqrestore(&card->res_lock, flags);
+ return (unsigned char) data;
+}
+
+
+
+module_init(nicstar_init);
+module_exit(nicstar_cleanup);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 11:32:23 +0100