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+/* starfire.c: Linux device driver for the Adaptec Starfire network adapter. */
+/*
+ Written 1998-2000 by Donald Becker.
+
+ Current maintainer is Ion Badulescu <ionut@cs.columbia.edu>. Please
+ send all bug reports to me, and not to Donald Becker, as this code
+ has been heavily modified from Donald's original version.
+
+ This software may be used and distributed according to the terms of
+ the GNU General Public License (GPL), incorporated herein by reference.
+ Drivers based on or derived from this code fall under the GPL and must
+ retain the authorship, copyright and license notice. This file is not
+ a complete program and may only be used when the entire operating
+ system is licensed under the GPL.
+
+ The information below comes from Donald Becker's original driver:
+
+ The author may be reached as becker@scyld.com, or C/O
+ Scyld Computing Corporation
+ 410 Severn Ave., Suite 210
+ Annapolis MD 21403
+
+ Support and updates available at
+ http://www.scyld.com/network/starfire.html
+
+ -----------------------------------------------------------
+
+ Linux kernel-specific changes:
+
+ LK1.1.1 (jgarzik):
+ - Use PCI driver interface
+ - Fix MOD_xxx races
+ - softnet fixups
+
+ LK1.1.2 (jgarzik):
+ - Merge Becker version 0.15
+
+ LK1.1.3 (Andrew Morton)
+ - Timer cleanups
+
+ LK1.1.4 (jgarzik):
+ - Merge Becker version 1.03
+
+ LK1.2.1 (Ion Badulescu <ionut@cs.columbia.edu>)
+ - Support hardware Rx/Tx checksumming
+ - Use the GFP firmware taken from Adaptec's Netware driver
+
+ LK1.2.2 (Ion Badulescu)
+ - Backported to 2.2.x
+
+ LK1.2.3 (Ion Badulescu)
+ - Fix the flaky mdio interface
+ - More compat clean-ups
+
+ LK1.2.4 (Ion Badulescu)
+ - More 2.2.x initialization fixes
+
+ LK1.2.5 (Ion Badulescu)
+ - Several fixes from Manfred Spraul
+
+ LK1.2.6 (Ion Badulescu)
+ - Fixed ifup/ifdown/ifup problem in 2.4.x
+
+ LK1.2.7 (Ion Badulescu)
+ - Removed unused code
+ - Made more functions static and __init
+
+ LK1.2.8 (Ion Badulescu)
+ - Quell bogus error messages, inform about the Tx threshold
+ - Removed #ifdef CONFIG_PCI, this driver is PCI only
+
+ LK1.2.9 (Ion Badulescu)
+ - Merged Jeff Garzik's changes from 2.4.4-pre5
+ - Added 2.2.x compatibility stuff required by the above changes
+
+ LK1.2.9a (Ion Badulescu)
+ - More updates from Jeff Garzik
+
+ LK1.3.0 (Ion Badulescu)
+ - Merged zerocopy support
+
+ LK1.3.1 (Ion Badulescu)
+ - Added ethtool support
+ - Added GPIO (media change) interrupt support
+
+ LK1.3.2 (Ion Badulescu)
+ - Fixed 2.2.x compatibility issues introduced in 1.3.1
+ - Fixed ethtool ioctl returning uninitialized memory
+
+ LK1.3.3 (Ion Badulescu)
+ - Initialize the TxMode register properly
+ - Don't dereference dev->priv after freeing it
+
+ LK1.3.4 (Ion Badulescu)
+ - Fixed initialization timing problems
+ - Fixed interrupt mask definitions
+
+ LK1.3.5 (jgarzik)
+ - ethtool NWAY_RST, GLINK, [GS]MSGLVL support
+
+ LK1.3.6:
+ - Sparc64 support and fixes (Ion Badulescu)
+ - Better stats and error handling (Ion Badulescu)
+ - Use new pci_set_mwi() PCI API function (jgarzik)
+
+ LK1.3.7 (Ion Badulescu)
+ - minimal implementation of tx_timeout()
+ - correctly shutdown the Rx/Tx engines in netdev_close()
+ - added calls to netif_carrier_on/off
+ (patch from Stefan Rompf <srompf@isg.de>)
+ - VLAN support
+
+ LK1.3.8 (Ion Badulescu)
+ - adjust DMA burst size on sparc64
+ - 64-bit support
+ - reworked zerocopy support for 64-bit buffers
+ - working and usable interrupt mitigation/latency
+ - reduced Tx interrupt frequency for lower interrupt overhead
+
+ LK1.3.9 (Ion Badulescu)
+ - bugfix for mcast filter
+ - enable the right kind of Tx interrupts (TxDMADone, not TxDone)
+
+ LK1.4.0 (Ion Badulescu)
+ - NAPI support
+
+ LK1.4.1 (Ion Badulescu)
+ - flush PCI posting buffers after disabling Rx interrupts
+ - put the chip to a D3 slumber on driver unload
+ - added config option to enable/disable NAPI
+
+TODO: bugfixes (no bugs known as of right now)
+*/
+
+#define DRV_NAME "starfire"
+#define DRV_VERSION "1.03+LK1.4.1"
+#define DRV_RELDATE "February 10, 2002"
+
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <asm/processor.h> /* Processor type for cache alignment. */
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/*
+ * Adaptec's license for their drivers (which is where I got the
+ * firmware files) does not allow one to redistribute them. Thus, we can't
+ * include the firmware with this driver.
+ *
+ * However, should a legal-to-distribute firmware become available,
+ * the driver developer would need only to obtain the firmware in the
+ * form of a C header file.
+ * Once that's done, the #undef below must be changed into a #define
+ * for this driver to really use the firmware. Note that Rx/Tx
+ * hardware TCP checksumming is not possible without the firmware.
+ *
+ * WANTED: legal firmware to include with this GPL'd driver.
+ */
+#undef HAS_FIRMWARE
+/*
+ * The current frame processor firmware fails to checksum a fragment
+ * of length 1. If and when this is fixed, the #define below can be removed.
+ */
+#define HAS_BROKEN_FIRMWARE
+/*
+ * Define this if using the driver with the zero-copy patch
+ */
+#if defined(HAS_FIRMWARE) && defined(MAX_SKB_FRAGS)
+#define ZEROCOPY
+#endif
+
+#ifdef HAS_FIRMWARE
+#include "starfire_firmware.h"
+#endif /* HAS_FIRMWARE */
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+#define VLAN_SUPPORT
+#endif
+
+#ifndef CONFIG_ADAPTEC_STARFIRE_NAPI
+#undef HAVE_NETDEV_POLL
+#endif
+
+/* The user-configurable values.
+ These may be modified when a driver module is loaded.*/
+
+/* Used for tuning interrupt latency vs. overhead. */
+static int intr_latency;
+static int small_frames;
+
+static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
+static int max_interrupt_work = 20;
+static int mtu;
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
+ The Starfire has a 512 element hash table based on the Ethernet CRC. */
+static int multicast_filter_limit = 512;
+/* Whether to do TCP/UDP checksums in hardware */
+#ifdef HAS_FIRMWARE
+static int enable_hw_cksum = 1;
+#else
+static int enable_hw_cksum = 0;
+#endif
+
+#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
+/*
+ * Set the copy breakpoint for the copy-only-tiny-frames scheme.
+ * Setting to > 1518 effectively disables this feature.
+ *
+ * NOTE:
+ * The ia64 doesn't allow for unaligned loads even of integers being
+ * misaligned on a 2 byte boundary. Thus always force copying of
+ * packets as the starfire doesn't allow for misaligned DMAs ;-(
+ * 23/10/2000 - Jes
+ *
+ * The Alpha and the Sparc don't like unaligned loads, either. On Sparc64,
+ * at least, having unaligned frames leads to a rather serious performance
+ * penalty. -Ion
+ */
+#if defined(__ia64__) || defined(__alpha__) || defined(__sparc__)
+static int rx_copybreak = PKT_BUF_SZ;
+#else
+static int rx_copybreak /* = 0 */;
+#endif
+
+/* PCI DMA burst size -- on sparc64 we want to force it to 64 bytes, on the others the default of 128 is fine. */
+#ifdef __sparc__
+#define DMA_BURST_SIZE 64
+#else
+#define DMA_BURST_SIZE 128
+#endif
+
+/* Used to pass the media type, etc.
+ Both 'options[]' and 'full_duplex[]' exist for driver interoperability.
+ The media type is usually passed in 'options[]'.
+ These variables are deprecated, use ethtool instead. -Ion
+*/
+#define MAX_UNITS 8 /* More are supported, limit only on options */
+static int options[MAX_UNITS] = {0, };
+static int full_duplex[MAX_UNITS] = {0, };
+
+/* Operational parameters that are set at compile time. */
+
+/* The "native" ring sizes are either 256 or 2048.
+ However in some modes a descriptor may be marked to wrap the ring earlier.
+*/
+#define RX_RING_SIZE 256
+#define TX_RING_SIZE 32
+/* The completion queues are fixed at 1024 entries i.e. 4K or 8KB. */
+#define DONE_Q_SIZE 1024
+/* All queues must be aligned on a 256-byte boundary */
+#define QUEUE_ALIGN 256
+
+#if RX_RING_SIZE > 256
+#define RX_Q_ENTRIES Rx2048QEntries
+#else
+#define RX_Q_ENTRIES Rx256QEntries
+#endif
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT (2 * HZ)
+
+/*
+ * This SUCKS.
+ * We need a much better method to determine if dma_addr_t is 64-bit.
+ */
+#if (defined(__i386__) && defined(CONFIG_HIGHMEM) && (LINUX_VERSION_CODE > 0x20500 || defined(CONFIG_HIGHMEM64G))) || defined(__x86_64__) || defined (__ia64__) || defined(__mips64__) || (defined(__mips__) && defined(CONFIG_HIGHMEM) && defined(CONFIG_64BIT_PHYS_ADDR))
+/* 64-bit dma_addr_t */
+#define ADDR_64BITS /* This chip uses 64 bit addresses. */
+#define cpu_to_dma(x) cpu_to_le64(x)
+#define dma_to_cpu(x) le64_to_cpu(x)
+#define RX_DESC_Q_ADDR_SIZE RxDescQAddr64bit
+#define TX_DESC_Q_ADDR_SIZE TxDescQAddr64bit
+#define RX_COMPL_Q_ADDR_SIZE RxComplQAddr64bit
+#define TX_COMPL_Q_ADDR_SIZE TxComplQAddr64bit
+#define RX_DESC_ADDR_SIZE RxDescAddr64bit
+#else /* 32-bit dma_addr_t */
+#define cpu_to_dma(x) cpu_to_le32(x)
+#define dma_to_cpu(x) le32_to_cpu(x)
+#define RX_DESC_Q_ADDR_SIZE RxDescQAddr32bit
+#define TX_DESC_Q_ADDR_SIZE TxDescQAddr32bit
+#define RX_COMPL_Q_ADDR_SIZE RxComplQAddr32bit
+#define TX_COMPL_Q_ADDR_SIZE TxComplQAddr32bit
+#define RX_DESC_ADDR_SIZE RxDescAddr32bit
+#endif
+
+#ifdef MAX_SKB_FRAGS
+#define skb_first_frag_len(skb) skb_headlen(skb)
+#define skb_num_frags(skb) (skb_shinfo(skb)->nr_frags + 1)
+#else /* not MAX_SKB_FRAGS */
+#define skb_first_frag_len(skb) (skb->len)
+#define skb_num_frags(skb) 1
+#endif /* not MAX_SKB_FRAGS */
+
+/* 2.2.x compatibility code */
+#if LINUX_VERSION_CODE < 0x20300
+
+#include "starfire-kcomp22.h"
+
+#else /* LINUX_VERSION_CODE > 0x20300 */
+
+#include <linux/crc32.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+
+#include <linux/if_vlan.h>
+
+#define init_tx_timer(dev, func, timeout) \
+ dev->tx_timeout = func; \
+ dev->watchdog_timeo = timeout;
+#define kick_tx_timer(dev, func, timeout)
+
+#define netif_start_if(dev)
+#define netif_stop_if(dev)
+
+#define PCI_SLOT_NAME(pci_dev) pci_name(pci_dev)
+
+#endif /* LINUX_VERSION_CODE > 0x20300 */
+
+#ifdef HAVE_NETDEV_POLL
+#define init_poll(dev) \
+ dev->poll = &netdev_poll; \
+ dev->weight = max_interrupt_work;
+#define netdev_rx(dev, ioaddr) \
+do { \
+ u32 intr_enable; \
+ if (netif_rx_schedule_prep(dev)) { \
+ __netif_rx_schedule(dev); \
+ intr_enable = readl(ioaddr + IntrEnable); \
+ intr_enable &= ~(IntrRxDone | IntrRxEmpty); \
+ writel(intr_enable, ioaddr + IntrEnable); \
+ readl(ioaddr + IntrEnable); /* flush PCI posting buffers */ \
+ } else { \
+ /* Paranoia check */ \
+ intr_enable = readl(ioaddr + IntrEnable); \
+ if (intr_enable & (IntrRxDone | IntrRxEmpty)) { \
+ printk("%s: interrupt while in polling mode!\n", dev->name); \
+ intr_enable &= ~(IntrRxDone | IntrRxEmpty); \
+ writel(intr_enable, ioaddr + IntrEnable); \
+ } \
+ } \
+} while (0)
+#define netdev_receive_skb(skb) netif_receive_skb(skb)
+#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_receive_skb(skb, vlgrp, vlid)
+static int netdev_poll(struct net_device *dev, int *budget);
+#else /* not HAVE_NETDEV_POLL */
+#define init_poll(dev)
+#define netdev_receive_skb(skb) netif_rx(skb)
+#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_rx(skb, vlgrp, vlid)
+#define netdev_rx(dev, ioaddr) \
+do { \
+ int quota = np->dirty_rx + RX_RING_SIZE - np->cur_rx; \
+ __netdev_rx(dev, &quota);\
+} while (0)
+#endif /* not HAVE_NETDEV_POLL */
+/* end of compatibility code */
+
+
+/* These identify the driver base version and may not be removed. */
+static char version[] __devinitdata =
+KERN_INFO "starfire.c:v1.03 7/26/2000 Written by Donald Becker <becker@scyld.com>\n"
+KERN_INFO " (unofficial 2.2/2.4 kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n";
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("Adaptec Starfire Ethernet driver");
+MODULE_LICENSE("GPL");
+
+module_param(max_interrupt_work, int, 0);
+module_param(mtu, int, 0);
+module_param(debug, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param(intr_latency, int, 0);
+module_param(small_frames, int, 0);
+module_param_array(options, int, NULL, 0);
+module_param_array(full_duplex, int, NULL, 0);
+module_param(enable_hw_cksum, int, 0);
+MODULE_PARM_DESC(max_interrupt_work, "Maximum events handled per interrupt");
+MODULE_PARM_DESC(mtu, "MTU (all boards)");
+MODULE_PARM_DESC(debug, "Debug level (0-6)");
+MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(intr_latency, "Maximum interrupt latency, in microseconds");
+MODULE_PARM_DESC(small_frames, "Maximum size of receive frames that bypass interrupt latency (0,64,128,256,512)");
+MODULE_PARM_DESC(options, "Deprecated: Bits 0-3: media type, bit 17: full duplex");
+MODULE_PARM_DESC(full_duplex, "Deprecated: Forced full-duplex setting (0/1)");
+MODULE_PARM_DESC(enable_hw_cksum, "Enable/disable hardware cksum support (0/1)");
+
+/*
+ Theory of Operation
+
+I. Board Compatibility
+
+This driver is for the Adaptec 6915 "Starfire" 64 bit PCI Ethernet adapter.
+
+II. Board-specific settings
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+The Starfire hardware uses multiple fixed-size descriptor queues/rings. The
+ring sizes are set fixed by the hardware, but may optionally be wrapped
+earlier by the END bit in the descriptor.
+This driver uses that hardware queue size for the Rx ring, where a large
+number of entries has no ill effect beyond increases the potential backlog.
+The Tx ring is wrapped with the END bit, since a large hardware Tx queue
+disables the queue layer priority ordering and we have no mechanism to
+utilize the hardware two-level priority queue. When modifying the
+RX/TX_RING_SIZE pay close attention to page sizes and the ring-empty warning
+levels.
+
+IIIb/c. Transmit/Receive Structure
+
+See the Adaptec manual for the many possible structures, and options for
+each structure. There are far too many to document all of them here.
+
+For transmit this driver uses type 0/1 transmit descriptors (depending
+on the 32/64 bitness of the architecture), and relies on automatic
+minimum-length padding. It does not use the completion queue
+consumer index, but instead checks for non-zero status entries.
+
+For receive this driver uses type 0/1/2/3 receive descriptors. The driver
+allocates full frame size skbuffs for the Rx ring buffers, so all frames
+should fit in a single descriptor. The driver does not use the completion
+queue consumer index, but instead checks for non-zero status entries.
+
+When an incoming frame is less than RX_COPYBREAK bytes long, a fresh skbuff
+is allocated and the frame is copied to the new skbuff. When the incoming
+frame is larger, the skbuff is passed directly up the protocol stack.
+Buffers consumed this way are replaced by newly allocated skbuffs in a later
+phase of receive.
+
+A notable aspect of operation is that unaligned buffers are not permitted by
+the Starfire hardware. Thus the IP header at offset 14 in an ethernet frame
+isn't longword aligned, which may cause problems on some machine
+e.g. Alphas and IA64. For these architectures, the driver is forced to copy
+the frame into a new skbuff unconditionally. Copied frames are put into the
+skbuff at an offset of "+2", thus 16-byte aligning the IP header.
+
+IIId. Synchronization
+
+The driver runs as two independent, single-threaded flows of control. One
+is the send-packet routine, which enforces single-threaded use by the
+dev->tbusy flag. The other thread is the interrupt handler, which is single
+threaded by the hardware and interrupt handling software.
+
+The send packet thread has partial control over the Tx ring and the netif_queue
+status. If the number of free Tx slots in the ring falls below a certain number
+(currently hardcoded to 4), it signals the upper layer to stop the queue.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring. After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. Iff the netif_queue is stopped and the
+number of free Tx slow is above the threshold, it signals the upper layer to
+restart the queue.
+
+IV. Notes
+
+IVb. References
+
+The Adaptec Starfire manuals, available only from Adaptec.
+http://www.scyld.com/expert/100mbps.html
+http://www.scyld.com/expert/NWay.html
+
+IVc. Errata
+
+- StopOnPerr is broken, don't enable
+- Hardware ethernet padding exposes random data, perform software padding
+ instead (unverified -- works correctly for all the hardware I have)
+
+*/
+
+
+
+enum chip_capability_flags {CanHaveMII=1, };
+
+enum chipset {
+ CH_6915 = 0,
+};
+
+static struct pci_device_id starfire_pci_tbl[] = {
+ { 0x9004, 0x6915, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_6915 },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, starfire_pci_tbl);
+
+/* A chip capabilities table, matching the CH_xxx entries in xxx_pci_tbl[] above. */
+static struct chip_info {
+ const char *name;
+ int drv_flags;
+} netdrv_tbl[] __devinitdata = {
+ { "Adaptec Starfire 6915", CanHaveMII },
+};
+
+
+/* Offsets to the device registers.
+ Unlike software-only systems, device drivers interact with complex hardware.
+ It's not useful to define symbolic names for every register bit in the
+ device. The name can only partially document the semantics and make
+ the driver longer and more difficult to read.
+ In general, only the important configuration values or bits changed
+ multiple times should be defined symbolically.
+*/
+enum register_offsets {
+ PCIDeviceConfig=0x50040, GenCtrl=0x50070, IntrTimerCtrl=0x50074,
+ IntrClear=0x50080, IntrStatus=0x50084, IntrEnable=0x50088,
+ MIICtrl=0x52000, TxStationAddr=0x50120, EEPROMCtrl=0x51000,
+ GPIOCtrl=0x5008C, TxDescCtrl=0x50090,
+ TxRingPtr=0x50098, HiPriTxRingPtr=0x50094, /* Low and High priority. */
+ TxRingHiAddr=0x5009C, /* 64 bit address extension. */
+ TxProducerIdx=0x500A0, TxConsumerIdx=0x500A4,
+ TxThreshold=0x500B0,
+ CompletionHiAddr=0x500B4, TxCompletionAddr=0x500B8,
+ RxCompletionAddr=0x500BC, RxCompletionQ2Addr=0x500C0,
+ CompletionQConsumerIdx=0x500C4, RxDMACtrl=0x500D0,
+ RxDescQCtrl=0x500D4, RxDescQHiAddr=0x500DC, RxDescQAddr=0x500E0,
+ RxDescQIdx=0x500E8, RxDMAStatus=0x500F0, RxFilterMode=0x500F4,
+ TxMode=0x55000, VlanType=0x55064,
+ PerfFilterTable=0x56000, HashTable=0x56100,
+ TxGfpMem=0x58000, RxGfpMem=0x5a000,
+};
+
+/*
+ * Bits in the interrupt status/mask registers.
+ * Warning: setting Intr[Ab]NormalSummary in the IntrEnable register
+ * enables all the interrupt sources that are or'ed into those status bits.
+ */
+enum intr_status_bits {
+ IntrLinkChange=0xf0000000, IntrStatsMax=0x08000000,
+ IntrAbnormalSummary=0x02000000, IntrGeneralTimer=0x01000000,
+ IntrSoftware=0x800000, IntrRxComplQ1Low=0x400000,
+ IntrTxComplQLow=0x200000, IntrPCI=0x100000,
+ IntrDMAErr=0x080000, IntrTxDataLow=0x040000,
+ IntrRxComplQ2Low=0x020000, IntrRxDescQ1Low=0x010000,
+ IntrNormalSummary=0x8000, IntrTxDone=0x4000,
+ IntrTxDMADone=0x2000, IntrTxEmpty=0x1000,
+ IntrEarlyRxQ2=0x0800, IntrEarlyRxQ1=0x0400,
+ IntrRxQ2Done=0x0200, IntrRxQ1Done=0x0100,
+ IntrRxGFPDead=0x80, IntrRxDescQ2Low=0x40,
+ IntrNoTxCsum=0x20, IntrTxBadID=0x10,
+ IntrHiPriTxBadID=0x08, IntrRxGfp=0x04,
+ IntrTxGfp=0x02, IntrPCIPad=0x01,
+ /* not quite bits */
+ IntrRxDone=IntrRxQ2Done | IntrRxQ1Done,
+ IntrRxEmpty=IntrRxDescQ1Low | IntrRxDescQ2Low,
+ IntrNormalMask=0xff00, IntrAbnormalMask=0x3ff00fe,
+};
+
+/* Bits in the RxFilterMode register. */
+enum rx_mode_bits {
+ AcceptBroadcast=0x04, AcceptAllMulticast=0x02, AcceptAll=0x01,
+ AcceptMulticast=0x10, PerfectFilter=0x40, HashFilter=0x30,
+ PerfectFilterVlan=0x80, MinVLANPrio=0xE000, VlanMode=0x0200,
+ WakeupOnGFP=0x0800,
+};
+
+/* Bits in the TxMode register */
+enum tx_mode_bits {
+ MiiSoftReset=0x8000, MIILoopback=0x4000,
+ TxFlowEnable=0x0800, RxFlowEnable=0x0400,
+ PadEnable=0x04, FullDuplex=0x02, HugeFrame=0x01,
+};
+
+/* Bits in the TxDescCtrl register. */
+enum tx_ctrl_bits {
+ TxDescSpaceUnlim=0x00, TxDescSpace32=0x10, TxDescSpace64=0x20,
+ TxDescSpace128=0x30, TxDescSpace256=0x40,
+ TxDescType0=0x00, TxDescType1=0x01, TxDescType2=0x02,
+ TxDescType3=0x03, TxDescType4=0x04,
+ TxNoDMACompletion=0x08,
+ TxDescQAddr64bit=0x80, TxDescQAddr32bit=0,
+ TxHiPriFIFOThreshShift=24, TxPadLenShift=16,
+ TxDMABurstSizeShift=8,
+};
+
+/* Bits in the RxDescQCtrl register. */
+enum rx_ctrl_bits {
+ RxBufferLenShift=16, RxMinDescrThreshShift=0,
+ RxPrefetchMode=0x8000, RxVariableQ=0x2000,
+ Rx2048QEntries=0x4000, Rx256QEntries=0,
+ RxDescAddr64bit=0x1000, RxDescAddr32bit=0,
+ RxDescQAddr64bit=0x0100, RxDescQAddr32bit=0,
+ RxDescSpace4=0x000, RxDescSpace8=0x100,
+ RxDescSpace16=0x200, RxDescSpace32=0x300,
+ RxDescSpace64=0x400, RxDescSpace128=0x500,
+ RxConsumerWrEn=0x80,
+};
+
+/* Bits in the RxDMACtrl register. */
+enum rx_dmactrl_bits {
+ RxReportBadFrames=0x80000000, RxDMAShortFrames=0x40000000,
+ RxDMABadFrames=0x20000000, RxDMACrcErrorFrames=0x10000000,
+ RxDMAControlFrame=0x08000000, RxDMAPauseFrame=0x04000000,
+ RxChecksumIgnore=0, RxChecksumRejectTCPUDP=0x02000000,
+ RxChecksumRejectTCPOnly=0x01000000,
+ RxCompletionQ2Enable=0x800000,
+ RxDMAQ2Disable=0, RxDMAQ2FPOnly=0x100000,
+ RxDMAQ2SmallPkt=0x200000, RxDMAQ2HighPrio=0x300000,
+ RxDMAQ2NonIP=0x400000,
+ RxUseBackupQueue=0x080000, RxDMACRC=0x040000,
+ RxEarlyIntThreshShift=12, RxHighPrioThreshShift=8,
+ RxBurstSizeShift=0,
+};
+
+/* Bits in the RxCompletionAddr register */
+enum rx_compl_bits {
+ RxComplQAddr64bit=0x80, RxComplQAddr32bit=0,
+ RxComplProducerWrEn=0x40,
+ RxComplType0=0x00, RxComplType1=0x10,
+ RxComplType2=0x20, RxComplType3=0x30,
+ RxComplThreshShift=0,
+};
+
+/* Bits in the TxCompletionAddr register */
+enum tx_compl_bits {
+ TxComplQAddr64bit=0x80, TxComplQAddr32bit=0,
+ TxComplProducerWrEn=0x40,
+ TxComplIntrStatus=0x20,
+ CommonQueueMode=0x10,
+ TxComplThreshShift=0,
+};
+
+/* Bits in the GenCtrl register */
+enum gen_ctrl_bits {
+ RxEnable=0x05, TxEnable=0x0a,
+ RxGFPEnable=0x10, TxGFPEnable=0x20,
+};
+
+/* Bits in the IntrTimerCtrl register */
+enum intr_ctrl_bits {
+ Timer10X=0x800, EnableIntrMasking=0x60, SmallFrameBypass=0x100,
+ SmallFrame64=0, SmallFrame128=0x200, SmallFrame256=0x400, SmallFrame512=0x600,
+ IntrLatencyMask=0x1f,
+};
+
+/* The Rx and Tx buffer descriptors. */
+struct starfire_rx_desc {
+ dma_addr_t rxaddr;
+};
+enum rx_desc_bits {
+ RxDescValid=1, RxDescEndRing=2,
+};
+
+/* Completion queue entry. */
+struct short_rx_done_desc {
+ u32 status; /* Low 16 bits is length. */
+};
+struct basic_rx_done_desc {
+ u32 status; /* Low 16 bits is length. */
+ u16 vlanid;
+ u16 status2;
+};
+struct csum_rx_done_desc {
+ u32 status; /* Low 16 bits is length. */
+ u16 csum; /* Partial checksum */
+ u16 status2;
+};
+struct full_rx_done_desc {
+ u32 status; /* Low 16 bits is length. */
+ u16 status3;
+ u16 status2;
+ u16 vlanid;
+ u16 csum; /* partial checksum */
+ u32 timestamp;
+};
+/* XXX: this is ugly and I'm not sure it's worth the trouble -Ion */
+#ifdef HAS_FIRMWARE
+#ifdef VLAN_SUPPORT
+typedef struct full_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType3
+#else /* not VLAN_SUPPORT */
+typedef struct csum_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType2
+#endif /* not VLAN_SUPPORT */
+#else /* not HAS_FIRMWARE */
+#ifdef VLAN_SUPPORT
+typedef struct basic_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType1
+#else /* not VLAN_SUPPORT */
+typedef struct short_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType0
+#endif /* not VLAN_SUPPORT */
+#endif /* not HAS_FIRMWARE */
+
+enum rx_done_bits {
+ RxOK=0x20000000, RxFIFOErr=0x10000000, RxBufQ2=0x08000000,
+};
+
+/* Type 1 Tx descriptor. */
+struct starfire_tx_desc_1 {
+ u32 status; /* Upper bits are status, lower 16 length. */
+ u32 addr;
+};
+
+/* Type 2 Tx descriptor. */
+struct starfire_tx_desc_2 {
+ u32 status; /* Upper bits are status, lower 16 length. */
+ u32 reserved;
+ u64 addr;
+};
+
+#ifdef ADDR_64BITS
+typedef struct starfire_tx_desc_2 starfire_tx_desc;
+#define TX_DESC_TYPE TxDescType2
+#else /* not ADDR_64BITS */
+typedef struct starfire_tx_desc_1 starfire_tx_desc;
+#define TX_DESC_TYPE TxDescType1
+#endif /* not ADDR_64BITS */
+#define TX_DESC_SPACING TxDescSpaceUnlim
+
+enum tx_desc_bits {
+ TxDescID=0xB0000000,
+ TxCRCEn=0x01000000, TxDescIntr=0x08000000,
+ TxRingWrap=0x04000000, TxCalTCP=0x02000000,
+};
+struct tx_done_desc {
+ u32 status; /* timestamp, index. */
+#if 0
+ u32 intrstatus; /* interrupt status */
+#endif
+};
+
+struct rx_ring_info {
+ struct sk_buff *skb;
+ dma_addr_t mapping;
+};
+struct tx_ring_info {
+ struct sk_buff *skb;
+ dma_addr_t mapping;
+ unsigned int used_slots;
+};
+
+#define PHY_CNT 2
+struct netdev_private {
+ /* Descriptor rings first for alignment. */
+ struct starfire_rx_desc *rx_ring;
+ starfire_tx_desc *tx_ring;
+ dma_addr_t rx_ring_dma;
+ dma_addr_t tx_ring_dma;
+ /* The addresses of rx/tx-in-place skbuffs. */
+ struct rx_ring_info rx_info[RX_RING_SIZE];
+ struct tx_ring_info tx_info[TX_RING_SIZE];
+ /* Pointers to completion queues (full pages). */
+ rx_done_desc *rx_done_q;
+ dma_addr_t rx_done_q_dma;
+ unsigned int rx_done;
+ struct tx_done_desc *tx_done_q;
+ dma_addr_t tx_done_q_dma;
+ unsigned int tx_done;
+ struct net_device_stats stats;
+ struct pci_dev *pci_dev;
+#ifdef VLAN_SUPPORT
+ struct vlan_group *vlgrp;
+#endif
+ void *queue_mem;
+ dma_addr_t queue_mem_dma;
+ size_t queue_mem_size;
+
+ /* Frequently used values: keep some adjacent for cache effect. */
+ spinlock_t lock;
+ unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
+ unsigned int cur_tx, dirty_tx, reap_tx;
+ unsigned int rx_buf_sz; /* Based on MTU+slack. */
+ /* These values keep track of the transceiver/media in use. */
+ int speed100; /* Set if speed == 100MBit. */
+ u32 tx_mode;
+ u32 intr_timer_ctrl;
+ u8 tx_threshold;
+ /* MII transceiver section. */
+ struct mii_if_info mii_if; /* MII lib hooks/info */
+ int phy_cnt; /* MII device addresses. */
+ unsigned char phys[PHY_CNT]; /* MII device addresses. */
+ void __iomem *base;
+};
+
+
+static int mdio_read(struct net_device *dev, int phy_id, int location);
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
+static int netdev_open(struct net_device *dev);
+static void check_duplex(struct net_device *dev);
+static void tx_timeout(struct net_device *dev);
+static void init_ring(struct net_device *dev);
+static int start_tx(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
+static void netdev_error(struct net_device *dev, int intr_status);
+static int __netdev_rx(struct net_device *dev, int *quota);
+static void refill_rx_ring(struct net_device *dev);
+static void netdev_error(struct net_device *dev, int intr_status);
+static void set_rx_mode(struct net_device *dev);
+static struct net_device_stats *get_stats(struct net_device *dev);
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static int netdev_close(struct net_device *dev);
+static void netdev_media_change(struct net_device *dev);
+static struct ethtool_ops ethtool_ops;
+
+
+#ifdef VLAN_SUPPORT
+static void netdev_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ spin_lock(&np->lock);
+ if (debug > 2)
+ printk("%s: Setting vlgrp to %p\n", dev->name, grp);
+ np->vlgrp = grp;
+ set_rx_mode(dev);
+ spin_unlock(&np->lock);
+}
+
+static void netdev_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ spin_lock(&np->lock);
+ if (debug > 1)
+ printk("%s: Adding vlanid %d to vlan filter\n", dev->name, vid);
+ set_rx_mode(dev);
+ spin_unlock(&np->lock);
+}
+
+static void netdev_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ spin_lock(&np->lock);
+ if (debug > 1)
+ printk("%s: removing vlanid %d from vlan filter\n", dev->name, vid);
+ if (np->vlgrp)
+ np->vlgrp->vlan_devices[vid] = NULL;
+ set_rx_mode(dev);
+ spin_unlock(&np->lock);
+}
+#endif /* VLAN_SUPPORT */
+
+
+static int __devinit starfire_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct netdev_private *np;
+ int i, irq, option, chip_idx = ent->driver_data;
+ struct net_device *dev;
+ static int card_idx = -1;
+ long ioaddr;
+ void __iomem *base;
+ int drv_flags, io_size;
+ int boguscnt;
+
+/* when built into the kernel, we only print version if device is found */
+#ifndef MODULE
+ static int printed_version;
+ if (!printed_version++)
+ printk(version);
+#endif
+
+ card_idx++;
+
+ if (pci_enable_device (pdev))
+ return -EIO;
+
+ ioaddr = pci_resource_start(pdev, 0);
+ io_size = pci_resource_len(pdev, 0);
+ if (!ioaddr || ((pci_resource_flags(pdev, 0) & IORESOURCE_MEM) == 0)) {
+ printk(KERN_ERR DRV_NAME " %d: no PCI MEM resources, aborting\n", card_idx);
+ return -ENODEV;
+ }
+
+ dev = alloc_etherdev(sizeof(*np));
+ if (!dev) {
+ printk(KERN_ERR DRV_NAME " %d: cannot alloc etherdev, aborting\n", card_idx);
+ return -ENOMEM;
+ }
+ SET_MODULE_OWNER(dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ irq = pdev->irq;
+
+ if (pci_request_regions (pdev, DRV_NAME)) {
+ printk(KERN_ERR DRV_NAME " %d: cannot reserve PCI resources, aborting\n", card_idx);
+ goto err_out_free_netdev;
+ }
+
+ /* ioremap is borken in Linux-2.2.x/sparc64 */
+ base = ioremap(ioaddr, io_size);
+ if (!base) {
+ printk(KERN_ERR DRV_NAME " %d: cannot remap %#x @ %#lx, aborting\n",
+ card_idx, io_size, ioaddr);
+ goto err_out_free_res;
+ }
+
+ pci_set_master(pdev);
+
+ /* enable MWI -- it vastly improves Rx performance on sparc64 */
+ pci_set_mwi(pdev);
+
+#ifdef MAX_SKB_FRAGS
+ dev->features |= NETIF_F_SG;
+#endif /* MAX_SKB_FRAGS */
+#ifdef ZEROCOPY
+ /* Starfire can do TCP/UDP checksumming */
+ if (enable_hw_cksum)
+ dev->features |= NETIF_F_IP_CSUM;
+#endif /* ZEROCOPY */
+#ifdef VLAN_SUPPORT
+ dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
+ dev->vlan_rx_register = netdev_vlan_rx_register;
+ dev->vlan_rx_add_vid = netdev_vlan_rx_add_vid;
+ dev->vlan_rx_kill_vid = netdev_vlan_rx_kill_vid;
+#endif /* VLAN_RX_KILL_VID */
+#ifdef ADDR_64BITS
+ dev->features |= NETIF_F_HIGHDMA;
+#endif /* ADDR_64BITS */
+
+ /* Serial EEPROM reads are hidden by the hardware. */
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = readb(base + EEPROMCtrl + 20 - i);
+
+#if ! defined(final_version) /* Dump the EEPROM contents during development. */
+ if (debug > 4)
+ for (i = 0; i < 0x20; i++)
+ printk("%2.2x%s",
+ (unsigned int)readb(base + EEPROMCtrl + i),
+ i % 16 != 15 ? " " : "\n");
+#endif
+
+ /* Issue soft reset */
+ writel(MiiSoftReset, base + TxMode);
+ udelay(1000);
+ writel(0, base + TxMode);
+
+ /* Reset the chip to erase previous misconfiguration. */
+ writel(1, base + PCIDeviceConfig);
+ boguscnt = 1000;
+ while (--boguscnt > 0) {
+ udelay(10);
+ if ((readl(base + PCIDeviceConfig) & 1) == 0)
+ break;
+ }
+ if (boguscnt == 0)
+ printk("%s: chipset reset never completed!\n", dev->name);
+ /* wait a little longer */
+ udelay(1000);
+
+ dev->base_addr = (unsigned long)base;
+ dev->irq = irq;
+
+ np = netdev_priv(dev);
+ np->base = base;
+ spin_lock_init(&np->lock);
+ pci_set_drvdata(pdev, dev);
+
+ np->pci_dev = pdev;
+
+ np->mii_if.dev = dev;
+ np->mii_if.mdio_read = mdio_read;
+ np->mii_if.mdio_write = mdio_write;
+ np->mii_if.phy_id_mask = 0x1f;
+ np->mii_if.reg_num_mask = 0x1f;
+
+ drv_flags = netdrv_tbl[chip_idx].drv_flags;
+
+ option = card_idx < MAX_UNITS ? options[card_idx] : 0;
+ if (dev->mem_start)
+ option = dev->mem_start;
+
+ /* The lower four bits are the media type. */
+ if (option & 0x200)
+ np->mii_if.full_duplex = 1;
+
+ if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
+ np->mii_if.full_duplex = 1;
+
+ if (np->mii_if.full_duplex)
+ np->mii_if.force_media = 1;
+ else
+ np->mii_if.force_media = 0;
+ np->speed100 = 1;
+
+ /* timer resolution is 128 * 0.8us */
+ np->intr_timer_ctrl = (((intr_latency * 10) / 1024) & IntrLatencyMask) |
+ Timer10X | EnableIntrMasking;
+
+ if (small_frames > 0) {
+ np->intr_timer_ctrl |= SmallFrameBypass;
+ switch (small_frames) {
+ case 1 ... 64:
+ np->intr_timer_ctrl |= SmallFrame64;
+ break;
+ case 65 ... 128:
+ np->intr_timer_ctrl |= SmallFrame128;
+ break;
+ case 129 ... 256:
+ np->intr_timer_ctrl |= SmallFrame256;
+ break;
+ default:
+ np->intr_timer_ctrl |= SmallFrame512;
+ if (small_frames > 512)
+ printk("Adjusting small_frames down to 512\n");
+ break;
+ }
+ }
+
+ /* The chip-specific entries in the device structure. */
+ dev->open = &netdev_open;
+ dev->hard_start_xmit = &start_tx;
+ init_tx_timer(dev, tx_timeout, TX_TIMEOUT);
+ init_poll(dev);
+ dev->stop = &netdev_close;
+ dev->get_stats = &get_stats;
+ dev->set_multicast_list = &set_rx_mode;
+ dev->do_ioctl = &netdev_ioctl;
+ SET_ETHTOOL_OPS(dev, &ethtool_ops);
+
+ if (mtu)
+ dev->mtu = mtu;
+
+ if (register_netdev(dev))
+ goto err_out_cleardev;
+
+ printk(KERN_INFO "%s: %s at %p, ",
+ dev->name, netdrv_tbl[chip_idx].name, base);
+ for (i = 0; i < 5; i++)
+ printk("%2.2x:", dev->dev_addr[i]);
+ printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
+
+ if (drv_flags & CanHaveMII) {
+ int phy, phy_idx = 0;
+ int mii_status;
+ for (phy = 0; phy < 32 && phy_idx < PHY_CNT; phy++) {
+ mdio_write(dev, phy, MII_BMCR, BMCR_RESET);
+ mdelay(100);
+ boguscnt = 1000;
+ while (--boguscnt > 0)
+ if ((mdio_read(dev, phy, MII_BMCR) & BMCR_RESET) == 0)
+ break;
+ if (boguscnt == 0) {
+ printk("%s: PHY reset never completed!\n", dev->name);
+ continue;
+ }
+ mii_status = mdio_read(dev, phy, MII_BMSR);
+ if (mii_status != 0) {
+ np->phys[phy_idx++] = phy;
+ np->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
+ printk(KERN_INFO "%s: MII PHY found at address %d, status "
+ "%#4.4x advertising %#4.4x.\n",
+ dev->name, phy, mii_status, np->mii_if.advertising);
+ /* there can be only one PHY on-board */
+ break;
+ }
+ }
+ np->phy_cnt = phy_idx;
+ if (np->phy_cnt > 0)
+ np->mii_if.phy_id = np->phys[0];
+ else
+ memset(&np->mii_if, 0, sizeof(np->mii_if));
+ }
+
+ printk(KERN_INFO "%s: scatter-gather and hardware TCP cksumming %s.\n",
+ dev->name, enable_hw_cksum ? "enabled" : "disabled");
+ return 0;
+
+err_out_cleardev:
+ pci_set_drvdata(pdev, NULL);
+ iounmap(base);
+err_out_free_res:
+ pci_release_regions (pdev);
+err_out_free_netdev:
+ free_netdev(dev);
+ return -ENODEV;
+}
+
+
+/* Read the MII Management Data I/O (MDIO) interfaces. */
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *mdio_addr = np->base + MIICtrl + (phy_id<<7) + (location<<2);
+ int result, boguscnt=1000;
+ /* ??? Should we add a busy-wait here? */
+ do
+ result = readl(mdio_addr);
+ while ((result & 0xC0000000) != 0x80000000 && --boguscnt > 0);
+ if (boguscnt == 0)
+ return 0;
+ if ((result & 0xffff) == 0xffff)
+ return 0;
+ return result & 0xffff;
+}
+
+
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *mdio_addr = np->base + MIICtrl + (phy_id<<7) + (location<<2);
+ writel(value, mdio_addr);
+ /* The busy-wait will occur before a read. */
+}
+
+
+static int netdev_open(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ int i, retval;
+ size_t tx_done_q_size, rx_done_q_size, tx_ring_size, rx_ring_size;
+
+ /* Do we ever need to reset the chip??? */
+ retval = request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev);
+ if (retval)
+ return retval;
+
+ /* Disable the Rx and Tx, and reset the chip. */
+ writel(0, ioaddr + GenCtrl);
+ writel(1, ioaddr + PCIDeviceConfig);
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
+ dev->name, dev->irq);
+
+ /* Allocate the various queues. */
+ if (np->queue_mem == 0) {
+ tx_done_q_size = ((sizeof(struct tx_done_desc) * DONE_Q_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+ rx_done_q_size = ((sizeof(rx_done_desc) * DONE_Q_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+ tx_ring_size = ((sizeof(starfire_tx_desc) * TX_RING_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+ rx_ring_size = sizeof(struct starfire_rx_desc) * RX_RING_SIZE;
+ np->queue_mem_size = tx_done_q_size + rx_done_q_size + tx_ring_size + rx_ring_size;
+ np->queue_mem = pci_alloc_consistent(np->pci_dev, np->queue_mem_size, &np->queue_mem_dma);
+ if (np->queue_mem == 0)
+ return -ENOMEM;
+
+ np->tx_done_q = np->queue_mem;
+ np->tx_done_q_dma = np->queue_mem_dma;
+ np->rx_done_q = (void *) np->tx_done_q + tx_done_q_size;
+ np->rx_done_q_dma = np->tx_done_q_dma + tx_done_q_size;
+ np->tx_ring = (void *) np->rx_done_q + rx_done_q_size;
+ np->tx_ring_dma = np->rx_done_q_dma + rx_done_q_size;
+ np->rx_ring = (void *) np->tx_ring + tx_ring_size;
+ np->rx_ring_dma = np->tx_ring_dma + tx_ring_size;
+ }
+
+ /* Start with no carrier, it gets adjusted later */
+ netif_carrier_off(dev);
+ init_ring(dev);
+ /* Set the size of the Rx buffers. */
+ writel((np->rx_buf_sz << RxBufferLenShift) |
+ (0 << RxMinDescrThreshShift) |
+ RxPrefetchMode | RxVariableQ |
+ RX_Q_ENTRIES |
+ RX_DESC_Q_ADDR_SIZE | RX_DESC_ADDR_SIZE |
+ RxDescSpace4,
+ ioaddr + RxDescQCtrl);
+
+ /* Set up the Rx DMA controller. */
+ writel(RxChecksumIgnore |
+ (0 << RxEarlyIntThreshShift) |
+ (6 << RxHighPrioThreshShift) |
+ ((DMA_BURST_SIZE / 32) << RxBurstSizeShift),
+ ioaddr + RxDMACtrl);
+
+ /* Set Tx descriptor */
+ writel((2 << TxHiPriFIFOThreshShift) |
+ (0 << TxPadLenShift) |
+ ((DMA_BURST_SIZE / 32) << TxDMABurstSizeShift) |
+ TX_DESC_Q_ADDR_SIZE |
+ TX_DESC_SPACING | TX_DESC_TYPE,
+ ioaddr + TxDescCtrl);
+
+ writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + RxDescQHiAddr);
+ writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + TxRingHiAddr);
+ writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + CompletionHiAddr);
+ writel(np->rx_ring_dma, ioaddr + RxDescQAddr);
+ writel(np->tx_ring_dma, ioaddr + TxRingPtr);
+
+ writel(np->tx_done_q_dma, ioaddr + TxCompletionAddr);
+ writel(np->rx_done_q_dma |
+ RxComplType |
+ (0 << RxComplThreshShift),
+ ioaddr + RxCompletionAddr);
+
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: Filling in the station address.\n", dev->name);
+
+ /* Fill both the Tx SA register and the Rx perfect filter. */
+ for (i = 0; i < 6; i++)
+ writeb(dev->dev_addr[i], ioaddr + TxStationAddr + 5 - i);
+ /* The first entry is special because it bypasses the VLAN filter.
+ Don't use it. */
+ writew(0, ioaddr + PerfFilterTable);
+ writew(0, ioaddr + PerfFilterTable + 4);
+ writew(0, ioaddr + PerfFilterTable + 8);
+ for (i = 1; i < 16; i++) {
+ u16 *eaddrs = (u16 *)dev->dev_addr;
+ void __iomem *setup_frm = ioaddr + PerfFilterTable + i * 16;
+ writew(cpu_to_be16(eaddrs[2]), setup_frm); setup_frm += 4;
+ writew(cpu_to_be16(eaddrs[1]), setup_frm); setup_frm += 4;
+ writew(cpu_to_be16(eaddrs[0]), setup_frm); setup_frm += 8;
+ }
+
+ /* Initialize other registers. */
+ /* Configure the PCI bus bursts and FIFO thresholds. */
+ np->tx_mode = TxFlowEnable|RxFlowEnable|PadEnable; /* modified when link is up. */
+ writel(MiiSoftReset | np->tx_mode, ioaddr + TxMode);
+ udelay(1000);
+ writel(np->tx_mode, ioaddr + TxMode);
+ np->tx_threshold = 4;
+ writel(np->tx_threshold, ioaddr + TxThreshold);
+
+ writel(np->intr_timer_ctrl, ioaddr + IntrTimerCtrl);
+
+ netif_start_if(dev);
+ netif_start_queue(dev);
+
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: Setting the Rx and Tx modes.\n", dev->name);
+ set_rx_mode(dev);
+
+ np->mii_if.advertising = mdio_read(dev, np->phys[0], MII_ADVERTISE);
+ check_duplex(dev);
+
+ /* Enable GPIO interrupts on link change */
+ writel(0x0f00ff00, ioaddr + GPIOCtrl);
+
+ /* Set the interrupt mask */
+ writel(IntrRxDone | IntrRxEmpty | IntrDMAErr |
+ IntrTxDMADone | IntrStatsMax | IntrLinkChange |
+ IntrRxGFPDead | IntrNoTxCsum | IntrTxBadID,
+ ioaddr + IntrEnable);
+ /* Enable PCI interrupts. */
+ writel(0x00800000 | readl(ioaddr + PCIDeviceConfig),
+ ioaddr + PCIDeviceConfig);
+
+#ifdef VLAN_SUPPORT
+ /* Set VLAN type to 802.1q */
+ writel(ETH_P_8021Q, ioaddr + VlanType);
+#endif /* VLAN_SUPPORT */
+
+#ifdef HAS_FIRMWARE
+ /* Load Rx/Tx firmware into the frame processors */
+ for (i = 0; i < FIRMWARE_RX_SIZE * 2; i++)
+ writel(firmware_rx[i], ioaddr + RxGfpMem + i * 4);
+ for (i = 0; i < FIRMWARE_TX_SIZE * 2; i++)
+ writel(firmware_tx[i], ioaddr + TxGfpMem + i * 4);
+#endif /* HAS_FIRMWARE */
+ if (enable_hw_cksum)
+ /* Enable the Rx and Tx units, and the Rx/Tx frame processors. */
+ writel(TxEnable|TxGFPEnable|RxEnable|RxGFPEnable, ioaddr + GenCtrl);
+ else
+ /* Enable the Rx and Tx units only. */
+ writel(TxEnable|RxEnable, ioaddr + GenCtrl);
+
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: Done netdev_open().\n",
+ dev->name);
+
+ return 0;
+}
+
+
+static void check_duplex(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ u16 reg0;
+ int silly_count = 1000;
+
+ mdio_write(dev, np->phys[0], MII_ADVERTISE, np->mii_if.advertising);
+ mdio_write(dev, np->phys[0], MII_BMCR, BMCR_RESET);
+ udelay(500);
+ while (--silly_count && mdio_read(dev, np->phys[0], MII_BMCR) & BMCR_RESET)
+ /* do nothing */;
+ if (!silly_count) {
+ printk("%s: MII reset failed!\n", dev->name);
+ return;
+ }
+
+ reg0 = mdio_read(dev, np->phys[0], MII_BMCR);
+
+ if (!np->mii_if.force_media) {
+ reg0 |= BMCR_ANENABLE | BMCR_ANRESTART;
+ } else {
+ reg0 &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
+ if (np->speed100)
+ reg0 |= BMCR_SPEED100;
+ if (np->mii_if.full_duplex)
+ reg0 |= BMCR_FULLDPLX;
+ printk(KERN_DEBUG "%s: Link forced to %sMbit %s-duplex\n",
+ dev->name,
+ np->speed100 ? "100" : "10",
+ np->mii_if.full_duplex ? "full" : "half");
+ }
+ mdio_write(dev, np->phys[0], MII_BMCR, reg0);
+}
+
+
+static void tx_timeout(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ int old_debug;
+
+ printk(KERN_WARNING "%s: Transmit timed out, status %#8.8x, "
+ "resetting...\n", dev->name, (int) readl(ioaddr + IntrStatus));
+
+ /* Perhaps we should reinitialize the hardware here. */
+
+ /*
+ * Stop and restart the interface.
+ * Cheat and increase the debug level temporarily.
+ */
+ old_debug = debug;
+ debug = 2;
+ netdev_close(dev);
+ netdev_open(dev);
+ debug = old_debug;
+
+ /* Trigger an immediate transmit demand. */
+
+ dev->trans_start = jiffies;
+ np->stats.tx_errors++;
+ netif_wake_queue(dev);
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void init_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int i;
+
+ np->cur_rx = np->cur_tx = np->reap_tx = 0;
+ np->dirty_rx = np->dirty_tx = np->rx_done = np->tx_done = 0;
+
+ np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
+
+ /* Fill in the Rx buffers. Handle allocation failure gracefully. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
+ np->rx_info[i].skb = skb;
+ if (skb == NULL)
+ break;
+ np->rx_info[i].mapping = pci_map_single(np->pci_dev, skb->tail, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ skb->dev = dev; /* Mark as being used by this device. */
+ /* Grrr, we cannot offset to correctly align the IP header. */
+ np->rx_ring[i].rxaddr = cpu_to_dma(np->rx_info[i].mapping | RxDescValid);
+ }
+ writew(i - 1, np->base + RxDescQIdx);
+ np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+
+ /* Clear the remainder of the Rx buffer ring. */
+ for ( ; i < RX_RING_SIZE; i++) {
+ np->rx_ring[i].rxaddr = 0;
+ np->rx_info[i].skb = NULL;
+ np->rx_info[i].mapping = 0;
+ }
+ /* Mark the last entry as wrapping the ring. */
+ np->rx_ring[RX_RING_SIZE - 1].rxaddr |= cpu_to_dma(RxDescEndRing);
+
+ /* Clear the completion rings. */
+ for (i = 0; i < DONE_Q_SIZE; i++) {
+ np->rx_done_q[i].status = 0;
+ np->tx_done_q[i].status = 0;
+ }
+
+ for (i = 0; i < TX_RING_SIZE; i++)
+ memset(&np->tx_info[i], 0, sizeof(np->tx_info[i]));
+
+ return;
+}
+
+
+static int start_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ unsigned int entry;
+ u32 status;
+ int i;
+
+ kick_tx_timer(dev, tx_timeout, TX_TIMEOUT);
+
+ /*
+ * be cautious here, wrapping the queue has weird semantics
+ * and we may not have enough slots even when it seems we do.
+ */
+ if ((np->cur_tx - np->dirty_tx) + skb_num_frags(skb) * 2 > TX_RING_SIZE) {
+ netif_stop_queue(dev);
+ return 1;
+ }
+
+#if defined(ZEROCOPY) && defined(HAS_BROKEN_FIRMWARE)
+ {
+ int has_bad_length = 0;
+
+ if (skb_first_frag_len(skb) == 1)
+ has_bad_length = 1;
+ else {
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ if (skb_shinfo(skb)->frags[i].size == 1) {
+ has_bad_length = 1;
+ break;
+ }
+ }
+
+ if (has_bad_length)
+ skb_checksum_help(skb);
+ }
+#endif /* ZEROCOPY && HAS_BROKEN_FIRMWARE */
+
+ entry = np->cur_tx % TX_RING_SIZE;
+ for (i = 0; i < skb_num_frags(skb); i++) {
+ int wrap_ring = 0;
+ status = TxDescID;
+
+ if (i == 0) {
+ np->tx_info[entry].skb = skb;
+ status |= TxCRCEn;
+ if (entry >= TX_RING_SIZE - skb_num_frags(skb)) {
+ status |= TxRingWrap;
+ wrap_ring = 1;
+ }
+ if (np->reap_tx) {
+ status |= TxDescIntr;
+ np->reap_tx = 0;
+ }
+ if (skb->ip_summed == CHECKSUM_HW) {
+ status |= TxCalTCP;
+ np->stats.tx_compressed++;
+ }
+ status |= skb_first_frag_len(skb) | (skb_num_frags(skb) << 16);
+
+ np->tx_info[entry].mapping =
+ pci_map_single(np->pci_dev, skb->data, skb_first_frag_len(skb), PCI_DMA_TODEVICE);
+ } else {
+#ifdef MAX_SKB_FRAGS
+ skb_frag_t *this_frag = &skb_shinfo(skb)->frags[i - 1];
+ status |= this_frag->size;
+ np->tx_info[entry].mapping =
+ pci_map_single(np->pci_dev, page_address(this_frag->page) + this_frag->page_offset, this_frag->size, PCI_DMA_TODEVICE);
+#endif /* MAX_SKB_FRAGS */
+ }
+
+ np->tx_ring[entry].addr = cpu_to_dma(np->tx_info[entry].mapping);
+ np->tx_ring[entry].status = cpu_to_le32(status);
+ if (debug > 3)
+ printk(KERN_DEBUG "%s: Tx #%d/#%d slot %d status %#8.8x.\n",
+ dev->name, np->cur_tx, np->dirty_tx,
+ entry, status);
+ if (wrap_ring) {
+ np->tx_info[entry].used_slots = TX_RING_SIZE - entry;
+ np->cur_tx += np->tx_info[entry].used_slots;
+ entry = 0;
+ } else {
+ np->tx_info[entry].used_slots = 1;
+ np->cur_tx += np->tx_info[entry].used_slots;
+ entry++;
+ }
+ /* scavenge the tx descriptors twice per TX_RING_SIZE */
+ if (np->cur_tx % (TX_RING_SIZE / 2) == 0)
+ np->reap_tx = 1;
+ }
+
+ /* Non-x86: explicitly flush descriptor cache lines here. */
+ /* Ensure all descriptors are written back before the transmit is
+ initiated. - Jes */
+ wmb();
+
+ /* Update the producer index. */
+ writel(entry * (sizeof(starfire_tx_desc) / 8), np->base + TxProducerIdx);
+
+ /* 4 is arbitrary, but should be ok */
+ if ((np->cur_tx - np->dirty_tx) + 4 > TX_RING_SIZE)
+ netif_stop_queue(dev);
+
+ dev->trans_start = jiffies;
+
+ return 0;
+}
+
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+ after the Tx thread. */
+static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
+{
+ struct net_device *dev = dev_instance;
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ int boguscnt = max_interrupt_work;
+ int consumer;
+ int tx_status;
+ int handled = 0;
+
+ do {
+ u32 intr_status = readl(ioaddr + IntrClear);
+
+ if (debug > 4)
+ printk(KERN_DEBUG "%s: Interrupt status %#8.8x.\n",
+ dev->name, intr_status);
+
+ if (intr_status == 0 || intr_status == (u32) -1)
+ break;
+
+ handled = 1;
+
+ if (intr_status & (IntrRxDone | IntrRxEmpty))
+ netdev_rx(dev, ioaddr);
+
+ /* Scavenge the skbuff list based on the Tx-done queue.
+ There are redundant checks here that may be cleaned up
+ after the driver has proven to be reliable. */
+ consumer = readl(ioaddr + TxConsumerIdx);
+ if (debug > 3)
+ printk(KERN_DEBUG "%s: Tx Consumer index is %d.\n",
+ dev->name, consumer);
+
+ while ((tx_status = le32_to_cpu(np->tx_done_q[np->tx_done].status)) != 0) {
+ if (debug > 3)
+ printk(KERN_DEBUG "%s: Tx completion #%d entry %d is %#8.8x.\n",
+ dev->name, np->dirty_tx, np->tx_done, tx_status);
+ if ((tx_status & 0xe0000000) == 0xa0000000) {
+ np->stats.tx_packets++;
+ } else if ((tx_status & 0xe0000000) == 0x80000000) {
+ u16 entry = (tx_status & 0x7fff) / sizeof(starfire_tx_desc);
+ struct sk_buff *skb = np->tx_info[entry].skb;
+ np->tx_info[entry].skb = NULL;
+ pci_unmap_single(np->pci_dev,
+ np->tx_info[entry].mapping,
+ skb_first_frag_len(skb),
+ PCI_DMA_TODEVICE);
+ np->tx_info[entry].mapping = 0;
+ np->dirty_tx += np->tx_info[entry].used_slots;
+ entry = (entry + np->tx_info[entry].used_slots) % TX_RING_SIZE;
+#ifdef MAX_SKB_FRAGS
+ {
+ int i;
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ pci_unmap_single(np->pci_dev,
+ np->tx_info[entry].mapping,
+ skb_shinfo(skb)->frags[i].size,
+ PCI_DMA_TODEVICE);
+ np->dirty_tx++;
+ entry++;
+ }
+ }
+#endif /* MAX_SKB_FRAGS */
+ dev_kfree_skb_irq(skb);
+ }
+ np->tx_done_q[np->tx_done].status = 0;
+ np->tx_done = (np->tx_done + 1) % DONE_Q_SIZE;
+ }
+ writew(np->tx_done, ioaddr + CompletionQConsumerIdx + 2);
+
+ if (netif_queue_stopped(dev) &&
+ (np->cur_tx - np->dirty_tx + 4 < TX_RING_SIZE)) {
+ /* The ring is no longer full, wake the queue. */
+ netif_wake_queue(dev);
+ }
+
+ /* Stats overflow */
+ if (intr_status & IntrStatsMax)
+ get_stats(dev);
+
+ /* Media change interrupt. */
+ if (intr_status & IntrLinkChange)
+ netdev_media_change(dev);
+
+ /* Abnormal error summary/uncommon events handlers. */
+ if (intr_status & IntrAbnormalSummary)
+ netdev_error(dev, intr_status);
+
+ if (--boguscnt < 0) {
+ if (debug > 1)
+ printk(KERN_WARNING "%s: Too much work at interrupt, "
+ "status=%#8.8x.\n",
+ dev->name, intr_status);
+ break;
+ }
+ } while (1);
+
+ if (debug > 4)
+ printk(KERN_DEBUG "%s: exiting interrupt, status=%#8.8x.\n",
+ dev->name, (int) readl(ioaddr + IntrStatus));
+ return IRQ_RETVAL(handled);
+}
+
+
+/* This routine is logically part of the interrupt/poll handler, but separated
+ for clarity, code sharing between NAPI/non-NAPI, and better register allocation. */
+static int __netdev_rx(struct net_device *dev, int *quota)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ u32 desc_status;
+ int retcode = 0;
+
+ /* If EOP is set on the next entry, it's a new packet. Send it up. */
+ while ((desc_status = le32_to_cpu(np->rx_done_q[np->rx_done].status)) != 0) {
+ struct sk_buff *skb;
+ u16 pkt_len;
+ int entry;
+ rx_done_desc *desc = &np->rx_done_q[np->rx_done];
+
+ if (debug > 4)
+ printk(KERN_DEBUG " netdev_rx() status of %d was %#8.8x.\n", np->rx_done, desc_status);
+ if (!(desc_status & RxOK)) {
+ /* There was a error. */
+ if (debug > 2)
+ printk(KERN_DEBUG " netdev_rx() Rx error was %#8.8x.\n", desc_status);
+ np->stats.rx_errors++;
+ if (desc_status & RxFIFOErr)
+ np->stats.rx_fifo_errors++;
+ goto next_rx;
+ }
+
+ if (*quota <= 0) { /* out of rx quota */
+ retcode = 1;
+ goto out;
+ }
+ (*quota)--;
+
+ pkt_len = desc_status; /* Implicitly Truncate */
+ entry = (desc_status >> 16) & 0x7ff;
+
+ if (debug > 4)
+ printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d, quota %d.\n", pkt_len, *quota);
+ /* Check if the packet is long enough to accept without copying
+ to a minimally-sized skbuff. */
+ if (pkt_len < rx_copybreak
+ && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+ skb->dev = dev;
+ skb_reserve(skb, 2); /* 16 byte align the IP header */
+ pci_dma_sync_single_for_cpu(np->pci_dev,
+ np->rx_info[entry].mapping,
+ pkt_len, PCI_DMA_FROMDEVICE);
+ eth_copy_and_sum(skb, np->rx_info[entry].skb->tail, pkt_len, 0);
+ pci_dma_sync_single_for_device(np->pci_dev,
+ np->rx_info[entry].mapping,
+ pkt_len, PCI_DMA_FROMDEVICE);
+ skb_put(skb, pkt_len);
+ } else {
+ pci_unmap_single(np->pci_dev, np->rx_info[entry].mapping, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ skb = np->rx_info[entry].skb;
+ skb_put(skb, pkt_len);
+ np->rx_info[entry].skb = NULL;
+ np->rx_info[entry].mapping = 0;
+ }
+#ifndef final_version /* Remove after testing. */
+ /* You will want this info for the initial debug. */
+ if (debug > 5)
+ printk(KERN_DEBUG " Rx data %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:"
+ "%2.2x %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x %2.2x%2.2x.\n",
+ skb->data[0], skb->data[1], skb->data[2], skb->data[3],
+ skb->data[4], skb->data[5], skb->data[6], skb->data[7],
+ skb->data[8], skb->data[9], skb->data[10],
+ skb->data[11], skb->data[12], skb->data[13]);
+#endif
+
+ skb->protocol = eth_type_trans(skb, dev);
+#if defined(HAS_FIRMWARE) || defined(VLAN_SUPPORT)
+ if (debug > 4)
+ printk(KERN_DEBUG " netdev_rx() status2 of %d was %#4.4x.\n", np->rx_done, le16_to_cpu(desc->status2));
+#endif
+#ifdef HAS_FIRMWARE
+ if (le16_to_cpu(desc->status2) & 0x0100) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ np->stats.rx_compressed++;
+ }
+ /*
+ * This feature doesn't seem to be working, at least
+ * with the two firmware versions I have. If the GFP sees
+ * an IP fragment, it either ignores it completely, or reports
+ * "bad checksum" on it.
+ *
+ * Maybe I missed something -- corrections are welcome.
+ * Until then, the printk stays. :-) -Ion
+ */
+ else if (le16_to_cpu(desc->status2) & 0x0040) {
+ skb->ip_summed = CHECKSUM_HW;
+ skb->csum = le16_to_cpu(desc->csum);
+ printk(KERN_DEBUG "%s: checksum_hw, status2 = %#x\n", dev->name, le16_to_cpu(desc->status2));
+ }
+#endif /* HAS_FIRMWARE */
+#ifdef VLAN_SUPPORT
+ if (np->vlgrp && le16_to_cpu(desc->status2) & 0x0200) {
+ if (debug > 4)
+ printk(KERN_DEBUG " netdev_rx() vlanid = %d\n", le16_to_cpu(desc->vlanid));
+ /* vlan_netdev_receive_skb() expects a packet with the VLAN tag stripped out */
+ vlan_netdev_receive_skb(skb, np->vlgrp, le16_to_cpu(desc->vlanid) & VLAN_VID_MASK);
+ } else
+#endif /* VLAN_SUPPORT */
+ netdev_receive_skb(skb);
+ dev->last_rx = jiffies;
+ np->stats.rx_packets++;
+
+ next_rx:
+ np->cur_rx++;
+ desc->status = 0;
+ np->rx_done = (np->rx_done + 1) % DONE_Q_SIZE;
+ }
+ writew(np->rx_done, np->base + CompletionQConsumerIdx);
+
+ out:
+ refill_rx_ring(dev);
+ if (debug > 5)
+ printk(KERN_DEBUG " exiting netdev_rx(): %d, status of %d was %#8.8x.\n",
+ retcode, np->rx_done, desc_status);
+ return retcode;
+}
+
+
+#ifdef HAVE_NETDEV_POLL
+static int netdev_poll(struct net_device *dev, int *budget)
+{
+ u32 intr_status;
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ int retcode = 0, quota = dev->quota;
+
+ do {
+ writel(IntrRxDone | IntrRxEmpty, ioaddr + IntrClear);
+
+ retcode = __netdev_rx(dev, &quota);
+ *budget -= (dev->quota - quota);
+ dev->quota = quota;
+ if (retcode)
+ goto out;
+
+ intr_status = readl(ioaddr + IntrStatus);
+ } while (intr_status & (IntrRxDone | IntrRxEmpty));
+
+ netif_rx_complete(dev);
+ intr_status = readl(ioaddr + IntrEnable);
+ intr_status |= IntrRxDone | IntrRxEmpty;
+ writel(intr_status, ioaddr + IntrEnable);
+
+ out:
+ if (debug > 5)
+ printk(KERN_DEBUG " exiting netdev_poll(): %d.\n", retcode);
+
+ /* Restart Rx engine if stopped. */
+ return retcode;
+}
+#endif /* HAVE_NETDEV_POLL */
+
+
+static void refill_rx_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ struct sk_buff *skb;
+ int entry = -1;
+
+ /* Refill the Rx ring buffers. */
+ for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
+ entry = np->dirty_rx % RX_RING_SIZE;
+ if (np->rx_info[entry].skb == NULL) {
+ skb = dev_alloc_skb(np->rx_buf_sz);
+ np->rx_info[entry].skb = skb;
+ if (skb == NULL)
+ break; /* Better luck next round. */
+ np->rx_info[entry].mapping =
+ pci_map_single(np->pci_dev, skb->tail, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ skb->dev = dev; /* Mark as being used by this device. */
+ np->rx_ring[entry].rxaddr =
+ cpu_to_dma(np->rx_info[entry].mapping | RxDescValid);
+ }
+ if (entry == RX_RING_SIZE - 1)
+ np->rx_ring[entry].rxaddr |= cpu_to_dma(RxDescEndRing);
+ }
+ if (entry >= 0)
+ writew(entry, np->base + RxDescQIdx);
+}
+
+
+static void netdev_media_change(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ u16 reg0, reg1, reg4, reg5;
+ u32 new_tx_mode;
+ u32 new_intr_timer_ctrl;
+
+ /* reset status first */
+ mdio_read(dev, np->phys[0], MII_BMCR);
+ mdio_read(dev, np->phys[0], MII_BMSR);
+
+ reg0 = mdio_read(dev, np->phys[0], MII_BMCR);
+ reg1 = mdio_read(dev, np->phys[0], MII_BMSR);
+
+ if (reg1 & BMSR_LSTATUS) {
+ /* link is up */
+ if (reg0 & BMCR_ANENABLE) {
+ /* autonegotiation is enabled */
+ reg4 = mdio_read(dev, np->phys[0], MII_ADVERTISE);
+ reg5 = mdio_read(dev, np->phys[0], MII_LPA);
+ if (reg4 & ADVERTISE_100FULL && reg5 & LPA_100FULL) {
+ np->speed100 = 1;
+ np->mii_if.full_duplex = 1;
+ } else if (reg4 & ADVERTISE_100HALF && reg5 & LPA_100HALF) {
+ np->speed100 = 1;
+ np->mii_if.full_duplex = 0;
+ } else if (reg4 & ADVERTISE_10FULL && reg5 & LPA_10FULL) {
+ np->speed100 = 0;
+ np->mii_if.full_duplex = 1;
+ } else {
+ np->speed100 = 0;
+ np->mii_if.full_duplex = 0;
+ }
+ } else {
+ /* autonegotiation is disabled */
+ if (reg0 & BMCR_SPEED100)
+ np->speed100 = 1;
+ else
+ np->speed100 = 0;
+ if (reg0 & BMCR_FULLDPLX)
+ np->mii_if.full_duplex = 1;
+ else
+ np->mii_if.full_duplex = 0;
+ }
+ netif_carrier_on(dev);
+ printk(KERN_DEBUG "%s: Link is up, running at %sMbit %s-duplex\n",
+ dev->name,
+ np->speed100 ? "100" : "10",
+ np->mii_if.full_duplex ? "full" : "half");
+
+ new_tx_mode = np->tx_mode & ~FullDuplex; /* duplex setting */
+ if (np->mii_if.full_duplex)
+ new_tx_mode |= FullDuplex;
+ if (np->tx_mode != new_tx_mode) {
+ np->tx_mode = new_tx_mode;
+ writel(np->tx_mode | MiiSoftReset, ioaddr + TxMode);
+ udelay(1000);
+ writel(np->tx_mode, ioaddr + TxMode);
+ }
+
+ new_intr_timer_ctrl = np->intr_timer_ctrl & ~Timer10X;
+ if (np->speed100)
+ new_intr_timer_ctrl |= Timer10X;
+ if (np->intr_timer_ctrl != new_intr_timer_ctrl) {
+ np->intr_timer_ctrl = new_intr_timer_ctrl;
+ writel(new_intr_timer_ctrl, ioaddr + IntrTimerCtrl);
+ }
+ } else {
+ netif_carrier_off(dev);
+ printk(KERN_DEBUG "%s: Link is down\n", dev->name);
+ }
+}
+
+
+static void netdev_error(struct net_device *dev, int intr_status)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ /* Came close to underrunning the Tx FIFO, increase threshold. */
+ if (intr_status & IntrTxDataLow) {
+ if (np->tx_threshold <= PKT_BUF_SZ / 16) {
+ writel(++np->tx_threshold, np->base + TxThreshold);
+ printk(KERN_NOTICE "%s: PCI bus congestion, increasing Tx FIFO threshold to %d bytes\n",
+ dev->name, np->tx_threshold * 16);
+ } else
+ printk(KERN_WARNING "%s: PCI Tx underflow -- adapter is probably malfunctioning\n", dev->name);
+ }
+ if (intr_status & IntrRxGFPDead) {
+ np->stats.rx_fifo_errors++;
+ np->stats.rx_errors++;
+ }
+ if (intr_status & (IntrNoTxCsum | IntrDMAErr)) {
+ np->stats.tx_fifo_errors++;
+ np->stats.tx_errors++;
+ }
+ if ((intr_status & ~(IntrNormalMask | IntrAbnormalSummary | IntrLinkChange | IntrStatsMax | IntrTxDataLow | IntrRxGFPDead | IntrNoTxCsum | IntrPCIPad)) && debug)
+ printk(KERN_ERR "%s: Something Wicked happened! %#8.8x.\n",
+ dev->name, intr_status);
+}
+
+
+static struct net_device_stats *get_stats(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+
+ /* This adapter architecture needs no SMP locks. */
+ np->stats.tx_bytes = readl(ioaddr + 0x57010);
+ np->stats.rx_bytes = readl(ioaddr + 0x57044);
+ np->stats.tx_packets = readl(ioaddr + 0x57000);
+ np->stats.tx_aborted_errors =
+ readl(ioaddr + 0x57024) + readl(ioaddr + 0x57028);
+ np->stats.tx_window_errors = readl(ioaddr + 0x57018);
+ np->stats.collisions =
+ readl(ioaddr + 0x57004) + readl(ioaddr + 0x57008);
+
+ /* The chip only need report frame silently dropped. */
+ np->stats.rx_dropped += readw(ioaddr + RxDMAStatus);
+ writew(0, ioaddr + RxDMAStatus);
+ np->stats.rx_crc_errors = readl(ioaddr + 0x5703C);
+ np->stats.rx_frame_errors = readl(ioaddr + 0x57040);
+ np->stats.rx_length_errors = readl(ioaddr + 0x57058);
+ np->stats.rx_missed_errors = readl(ioaddr + 0x5707C);
+
+ return &np->stats;
+}
+
+
+/* Chips may use the upper or lower CRC bits, and may reverse and/or invert
+ them. Select the endian-ness that results in minimal calculations.
+*/
+static void set_rx_mode(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ u32 rx_mode = MinVLANPrio;
+ struct dev_mc_list *mclist;
+ int i;
+#ifdef VLAN_SUPPORT
+
+ rx_mode |= VlanMode;
+ if (np->vlgrp) {
+ int vlan_count = 0;
+ void __iomem *filter_addr = ioaddr + HashTable + 8;
+ for (i = 0; i < VLAN_VID_MASK; i++) {
+ if (np->vlgrp->vlan_devices[i]) {
+ if (vlan_count >= 32)
+ break;
+ writew(cpu_to_be16(i), filter_addr);
+ filter_addr += 16;
+ vlan_count++;
+ }
+ }
+ if (i == VLAN_VID_MASK) {
+ rx_mode |= PerfectFilterVlan;
+ while (vlan_count < 32) {
+ writew(0, filter_addr);
+ filter_addr += 16;
+ vlan_count++;
+ }
+ }
+ }
+#endif /* VLAN_SUPPORT */
+
+ if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
+ rx_mode |= AcceptAll;
+ } else if ((dev->mc_count > multicast_filter_limit)
+ || (dev->flags & IFF_ALLMULTI)) {
+ /* Too many to match, or accept all multicasts. */
+ rx_mode |= AcceptBroadcast|AcceptAllMulticast|PerfectFilter;
+ } else if (dev->mc_count <= 14) {
+ /* Use the 16 element perfect filter, skip first two entries. */
+ void __iomem *filter_addr = ioaddr + PerfFilterTable + 2 * 16;
+ u16 *eaddrs;
+ for (i = 2, mclist = dev->mc_list; mclist && i < dev->mc_count + 2;
+ i++, mclist = mclist->next) {
+ eaddrs = (u16 *)mclist->dmi_addr;
+ writew(cpu_to_be16(eaddrs[2]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[1]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[0]), filter_addr); filter_addr += 8;
+ }
+ eaddrs = (u16 *)dev->dev_addr;
+ while (i++ < 16) {
+ writew(cpu_to_be16(eaddrs[0]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[1]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[2]), filter_addr); filter_addr += 8;
+ }
+ rx_mode |= AcceptBroadcast|PerfectFilter;
+ } else {
+ /* Must use a multicast hash table. */
+ void __iomem *filter_addr;
+ u16 *eaddrs;
+ u16 mc_filter[32] __attribute__ ((aligned(sizeof(long)))); /* Multicast hash filter */
+
+ memset(mc_filter, 0, sizeof(mc_filter));
+ for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+ i++, mclist = mclist->next) {
+ int bit_nr = ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 23;
+ __u32 *fptr = (__u32 *) &mc_filter[(bit_nr >> 4) & ~1];
+
+ *fptr |= cpu_to_le32(1 << (bit_nr & 31));
+ }
+ /* Clear the perfect filter list, skip first two entries. */
+ filter_addr = ioaddr + PerfFilterTable + 2 * 16;
+ eaddrs = (u16 *)dev->dev_addr;
+ for (i = 2; i < 16; i++) {
+ writew(cpu_to_be16(eaddrs[0]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[1]), filter_addr); filter_addr += 4;
+ writew(cpu_to_be16(eaddrs[2]), filter_addr); filter_addr += 8;
+ }
+ for (filter_addr = ioaddr + HashTable, i = 0; i < 32; filter_addr+= 16, i++)
+ writew(mc_filter[i], filter_addr);
+ rx_mode |= AcceptBroadcast|PerfectFilter|HashFilter;
+ }
+ writel(rx_mode, ioaddr + RxFilterMode);
+}
+
+static int check_if_running(struct net_device *dev)
+{
+ if (!netif_running(dev))
+ return -EINVAL;
+ return 0;
+}
+
+static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, PCI_SLOT_NAME(np->pci_dev));
+}
+
+static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ spin_lock_irq(&np->lock);
+ mii_ethtool_gset(&np->mii_if, ecmd);
+ spin_unlock_irq(&np->lock);
+ return 0;
+}
+
+static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int res;
+ spin_lock_irq(&np->lock);
+ res = mii_ethtool_sset(&np->mii_if, ecmd);
+ spin_unlock_irq(&np->lock);
+ check_duplex(dev);
+ return res;
+}
+
+static int nway_reset(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ return mii_nway_restart(&np->mii_if);
+}
+
+static u32 get_link(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ return mii_link_ok(&np->mii_if);
+}
+
+static u32 get_msglevel(struct net_device *dev)
+{
+ return debug;
+}
+
+static void set_msglevel(struct net_device *dev, u32 val)
+{
+ debug = val;
+}
+
+static struct ethtool_ops ethtool_ops = {
+ .begin = check_if_running,
+ .get_drvinfo = get_drvinfo,
+ .get_settings = get_settings,
+ .set_settings = set_settings,
+ .nway_reset = nway_reset,
+ .get_link = get_link,
+ .get_msglevel = get_msglevel,
+ .set_msglevel = set_msglevel,
+};
+
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ struct mii_ioctl_data *data = if_mii(rq);
+ int rc;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ spin_lock_irq(&np->lock);
+ rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
+ spin_unlock_irq(&np->lock);
+
+ if ((cmd == SIOCSMIIREG) && (data->phy_id == np->phys[0]))
+ check_duplex(dev);
+
+ return rc;
+}
+
+static int netdev_close(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = np->base;
+ int i;
+
+ netif_stop_queue(dev);
+ netif_stop_if(dev);
+
+ if (debug > 1) {
+ printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %#8.8x.\n",
+ dev->name, (int) readl(ioaddr + IntrStatus));
+ printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
+ dev->name, np->cur_tx, np->dirty_tx,
+ np->cur_rx, np->dirty_rx);
+ }
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ writel(0, ioaddr + IntrEnable);
+
+ /* Stop the chip's Tx and Rx processes. */
+ writel(0, ioaddr + GenCtrl);
+ readl(ioaddr + GenCtrl);
+
+ if (debug > 5) {
+ printk(KERN_DEBUG" Tx ring at %#llx:\n",
+ (long long) np->tx_ring_dma);
+ for (i = 0; i < 8 /* TX_RING_SIZE is huge! */; i++)
+ printk(KERN_DEBUG " #%d desc. %#8.8x %#llx -> %#8.8x.\n",
+ i, le32_to_cpu(np->tx_ring[i].status),
+ (long long) dma_to_cpu(np->tx_ring[i].addr),
+ le32_to_cpu(np->tx_done_q[i].status));
+ printk(KERN_DEBUG " Rx ring at %#llx -> %p:\n",
+ (long long) np->rx_ring_dma, np->rx_done_q);
+ if (np->rx_done_q)
+ for (i = 0; i < 8 /* RX_RING_SIZE */; i++) {
+ printk(KERN_DEBUG " #%d desc. %#llx -> %#8.8x\n",
+ i, (long long) dma_to_cpu(np->rx_ring[i].rxaddr), le32_to_cpu(np->rx_done_q[i].status));
+ }
+ }
+
+ free_irq(dev->irq, dev);
+
+ /* Free all the skbuffs in the Rx queue. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ np->rx_ring[i].rxaddr = cpu_to_dma(0xBADF00D0); /* An invalid address. */
+ if (np->rx_info[i].skb != NULL) {
+ pci_unmap_single(np->pci_dev, np->rx_info[i].mapping, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(np->rx_info[i].skb);
+ }
+ np->rx_info[i].skb = NULL;
+ np->rx_info[i].mapping = 0;
+ }
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ struct sk_buff *skb = np->tx_info[i].skb;
+ if (skb == NULL)
+ continue;
+ pci_unmap_single(np->pci_dev,
+ np->tx_info[i].mapping,
+ skb_first_frag_len(skb), PCI_DMA_TODEVICE);
+ np->tx_info[i].mapping = 0;
+ dev_kfree_skb(skb);
+ np->tx_info[i].skb = NULL;
+ }
+
+ return 0;
+}
+
+
+static void __devexit starfire_remove_one (struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct netdev_private *np = netdev_priv(dev);
+
+ if (!dev)
+ BUG();
+
+ unregister_netdev(dev);
+
+ if (np->queue_mem)
+ pci_free_consistent(pdev, np->queue_mem_size, np->queue_mem, np->queue_mem_dma);
+
+
+ /* XXX: add wakeup code -- requires firmware for MagicPacket */
+ pci_set_power_state(pdev, PCI_D3hot); /* go to sleep in D3 mode */
+ pci_disable_device(pdev);
+
+ iounmap(np->base);
+ pci_release_regions(pdev);
+
+ pci_set_drvdata(pdev, NULL);
+ free_netdev(dev); /* Will also free np!! */
+}
+
+
+static struct pci_driver starfire_driver = {
+ .name = DRV_NAME,
+ .probe = starfire_init_one,
+ .remove = __devexit_p(starfire_remove_one),
+ .id_table = starfire_pci_tbl,
+};
+
+
+static int __init starfire_init (void)
+{
+/* when a module, this is printed whether or not devices are found in probe */
+#ifdef MODULE
+ printk(version);
+#endif
+#ifndef ADDR_64BITS
+ /* we can do this test only at run-time... sigh */
+ if (sizeof(dma_addr_t) == sizeof(u64)) {
+ printk("This driver has not been ported to this 64-bit architecture yet\n");
+ return -ENODEV;
+ }
+#endif /* not ADDR_64BITS */
+#ifndef HAS_FIRMWARE
+ /* unconditionally disable hw cksums if firmware is not present */
+ enable_hw_cksum = 0;
+#endif /* not HAS_FIRMWARE */
+ return pci_module_init (&starfire_driver);
+}
+
+
+static void __exit starfire_cleanup (void)
+{
+ pci_unregister_driver (&starfire_driver);
+}
+
+
+module_init(starfire_init);
+module_exit(starfire_cleanup);
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-17 02:58:19 +0000