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linux/drivers/net/defxx.c

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/*
* File Name:
* defxx.c
*
* Copyright Information:
* Copyright Digital Equipment Corporation 1996.
*
* This software may be used and distributed according to the terms of
* the GNU General Public License, incorporated herein by reference.
*
* Abstract:
* A Linux device driver supporting the Digital Equipment Corporation
* FDDI EISA and PCI controller families. Supported adapters include:
*
* DEC FDDIcontroller/EISA (DEFEA)
* DEC FDDIcontroller/PCI (DEFPA)
*
* The original author:
* LVS Lawrence V. Stefani <lstefani@yahoo.com>
*
* Maintainers:
* macro Maciej W. Rozycki <macro@linux-mips.org>
*
* Credits:
* I'd like to thank Patricia Cross for helping me get started with
* Linux, David Davies for a lot of help upgrading and configuring
* my development system and for answering many OS and driver
* development questions, and Alan Cox for recommendations and
* integration help on getting FDDI support into Linux. LVS
*
* Driver Architecture:
* The driver architecture is largely based on previous driver work
* for other operating systems. The upper edge interface and
* functions were largely taken from existing Linux device drivers
* such as David Davies' DE4X5.C driver and Donald Becker's TULIP.C
* driver.
*
* Adapter Probe -
* The driver scans for supported EISA adapters by reading the
* SLOT ID register for each EISA slot and making a match
* against the expected value.
*
* Bus-Specific Initialization -
* This driver currently supports both EISA and PCI controller
* families. While the custom DMA chip and FDDI logic is similar
* or identical, the bus logic is very different. After
* initialization, the only bus-specific differences is in how the
* driver enables and disables interrupts. Other than that, the
* run-time critical code behaves the same on both families.
* It's important to note that both adapter families are configured
* to I/O map, rather than memory map, the adapter registers.
*
* Driver Open/Close -
* In the driver open routine, the driver ISR (interrupt service
* routine) is registered and the adapter is brought to an
* operational state. In the driver close routine, the opposite
* occurs; the driver ISR is deregistered and the adapter is
* brought to a safe, but closed state. Users may use consecutive
* commands to bring the adapter up and down as in the following
* example:
* ifconfig fddi0 up
* ifconfig fddi0 down
* ifconfig fddi0 up
*
* Driver Shutdown -
* Apparently, there is no shutdown or halt routine support under
* Linux. This routine would be called during "reboot" or
* "shutdown" to allow the driver to place the adapter in a safe
* state before a warm reboot occurs. To be really safe, the user
* should close the adapter before shutdown (eg. ifconfig fddi0 down)
* to ensure that the adapter DMA engine is taken off-line. However,
* the current driver code anticipates this problem and always issues
* a soft reset of the adapter at the beginning of driver initialization.
* A future driver enhancement in this area may occur in 2.1.X where
* Alan indicated that a shutdown handler may be implemented.
*
* Interrupt Service Routine -
* The driver supports shared interrupts, so the ISR is registered for
* each board with the appropriate flag and the pointer to that board's
* device structure. This provides the context during interrupt
* processing to support shared interrupts and multiple boards.
*
* Interrupt enabling/disabling can occur at many levels. At the host
* end, you can disable system interrupts, or disable interrupts at the
* PIC (on Intel systems). Across the bus, both EISA and PCI adapters
* have a bus-logic chip interrupt enable/disable as well as a DMA
* controller interrupt enable/disable.
*
* The driver currently enables and disables adapter interrupts at the
* bus-logic chip and assumes that Linux will take care of clearing or
* acknowledging any host-based interrupt chips.
*
* Control Functions -
* Control functions are those used to support functions such as adding
* or deleting multicast addresses, enabling or disabling packet
* reception filters, or other custom/proprietary commands. Presently,
* the driver supports the "get statistics", "set multicast list", and
* "set mac address" functions defined by Linux. A list of possible
* enhancements include:
*
* - Custom ioctl interface for executing port interface commands
* - Custom ioctl interface for adding unicast addresses to
* adapter CAM (to support bridge functions).
* - Custom ioctl interface for supporting firmware upgrades.
*
* Hardware (port interface) Support Routines -
* The driver function names that start with "dfx_hw_" represent
* low-level port interface routines that are called frequently. They
* include issuing a DMA or port control command to the adapter,
* resetting the adapter, or reading the adapter state. Since the
* driver initialization and run-time code must make calls into the
* port interface, these routines were written to be as generic and
* usable as possible.
*
* Receive Path -
* The adapter DMA engine supports a 256 entry receive descriptor block
* of which up to 255 entries can be used at any given time. The
* architecture is a standard producer, consumer, completion model in
* which the driver "produces" receive buffers to the adapter, the
* adapter "consumes" the receive buffers by DMAing incoming packet data,
* and the driver "completes" the receive buffers by servicing the
* incoming packet, then "produces" a new buffer and starts the cycle
* again. Receive buffers can be fragmented in up to 16 fragments
* (descriptor entries). For simplicity, this driver posts
* single-fragment receive buffers of 4608 bytes, then allocates a
* sk_buff, copies the data, then reposts the buffer. To reduce CPU
* utilization, a better approach would be to pass up the receive
* buffer (no extra copy) then allocate and post a replacement buffer.
* This is a performance enhancement that should be looked into at
* some point.
*
* Transmit Path -
* Like the receive path, the adapter DMA engine supports a 256 entry
* transmit descriptor block of which up to 255 entries can be used at
* any given time. Transmit buffers can be fragmented in up to 255
* fragments (descriptor entries). This driver always posts one
* fragment per transmit packet request.
*
* The fragment contains the entire packet from FC to end of data.
* Before posting the buffer to the adapter, the driver sets a three-byte
* packet request header (PRH) which is required by the Motorola MAC chip
* used on the adapters. The PRH tells the MAC the type of token to
* receive/send, whether or not to generate and append the CRC, whether
* synchronous or asynchronous framing is used, etc. Since the PRH
* definition is not necessarily consistent across all FDDI chipsets,
* the driver, rather than the common FDDI packet handler routines,
* sets these bytes.
*
* To reduce the amount of descriptor fetches needed per transmit request,
* the driver takes advantage of the fact that there are at least three
* bytes available before the skb->data field on the outgoing transmit
* request. This is guaranteed by having fddi_setup() in net_init.c set
* dev->hard_header_len to 24 bytes. 21 bytes accounts for the largest
* header in an 802.2 SNAP frame. The other 3 bytes are the extra "pad"
* bytes which we'll use to store the PRH.
*
* There's a subtle advantage to adding these pad bytes to the
* hard_header_len, it ensures that the data portion of the packet for
* an 802.2 SNAP frame is longword aligned. Other FDDI driver
* implementations may not need the extra padding and can start copying
* or DMAing directly from the FC byte which starts at skb->data. Should
* another driver implementation need ADDITIONAL padding, the net_init.c
* module should be updated and dev->hard_header_len should be increased.
* NOTE: To maintain the alignment on the data portion of the packet,
* dev->hard_header_len should always be evenly divisible by 4 and at
* least 24 bytes in size.
*
* Modification History:
* Date Name Description
* 16-Aug-96 LVS Created.
* 20-Aug-96 LVS Updated dfx_probe so that version information
* string is only displayed if 1 or more cards are
* found. Changed dfx_rcv_queue_process to copy
* 3 NULL bytes before FC to ensure that data is
* longword aligned in receive buffer.
* 09-Sep-96 LVS Updated dfx_ctl_set_multicast_list to enable
* LLC group promiscuous mode if multicast list
* is too large. LLC individual/group promiscuous
* mode is now disabled if IFF_PROMISC flag not set.
* dfx_xmt_queue_pkt no longer checks for NULL skb
* on Alan Cox recommendation. Added node address
* override support.
* 12-Sep-96 LVS Reset current address to factory address during
* device open. Updated transmit path to post a
* single fragment which includes PRH->end of data.
* Mar 2000 AC Did various cleanups for 2.3.x
* Jun 2000 jgarzik PCI and resource alloc cleanups
* Jul 2000 tjeerd Much cleanup and some bug fixes
* Sep 2000 tjeerd Fix leak on unload, cosmetic code cleanup
* Feb 2001 Skb allocation fixes
* Feb 2001 davej PCI enable cleanups.
* 04 Aug 2003 macro Converted to the DMA API.
* 14 Aug 2004 macro Fix device names reported.
* 14 Jun 2005 macro Use irqreturn_t.
*/
/* Include files */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/fddidevice.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include "defxx.h"
/* Version information string should be updated prior to each new release! */
#define DRV_NAME "defxx"
#define DRV_VERSION "v1.08"
#define DRV_RELDATE "2005/06/14"
static char version[] __devinitdata =
DRV_NAME ": " DRV_VERSION " " DRV_RELDATE
" Lawrence V. Stefani and others\n";
#define DYNAMIC_BUFFERS 1
#define SKBUFF_RX_COPYBREAK 200
/*
* NEW_SKB_SIZE = PI_RCV_DATA_K_SIZE_MAX+128 to allow 128 byte
* alignment for compatibility with old EISA boards.
*/
#define NEW_SKB_SIZE (PI_RCV_DATA_K_SIZE_MAX+128)
/* Define module-wide (static) routines */
static void dfx_bus_init(struct net_device *dev);
static void dfx_bus_config_check(DFX_board_t *bp);
static int dfx_driver_init(struct net_device *dev, const char *print_name);
static int dfx_adap_init(DFX_board_t *bp, int get_buffers);
static int dfx_open(struct net_device *dev);
static int dfx_close(struct net_device *dev);
static void dfx_int_pr_halt_id(DFX_board_t *bp);
static void dfx_int_type_0_process(DFX_board_t *bp);
static void dfx_int_common(struct net_device *dev);
static irqreturn_t dfx_interrupt(int irq, void *dev_id,
struct pt_regs *regs);
static struct net_device_stats *dfx_ctl_get_stats(struct net_device *dev);
static void dfx_ctl_set_multicast_list(struct net_device *dev);
static int dfx_ctl_set_mac_address(struct net_device *dev, void *addr);
static int dfx_ctl_update_cam(DFX_board_t *bp);
static int dfx_ctl_update_filters(DFX_board_t *bp);
static int dfx_hw_dma_cmd_req(DFX_board_t *bp);
static int dfx_hw_port_ctrl_req(DFX_board_t *bp, PI_UINT32 command, PI_UINT32 data_a, PI_UINT32 data_b, PI_UINT32 *host_data);
static void dfx_hw_adap_reset(DFX_board_t *bp, PI_UINT32 type);
static int dfx_hw_adap_state_rd(DFX_board_t *bp);
static int dfx_hw_dma_uninit(DFX_board_t *bp, PI_UINT32 type);
static int dfx_rcv_init(DFX_board_t *bp, int get_buffers);
static void dfx_rcv_queue_process(DFX_board_t *bp);
static void dfx_rcv_flush(DFX_board_t *bp);
static int dfx_xmt_queue_pkt(struct sk_buff *skb, struct net_device *dev);
static int dfx_xmt_done(DFX_board_t *bp);
static void dfx_xmt_flush(DFX_board_t *bp);
/* Define module-wide (static) variables */
static struct net_device *root_dfx_eisa_dev;
/*
* =======================
* = dfx_port_write_byte =
* = dfx_port_read_byte =
* = dfx_port_write_long =
* = dfx_port_read_long =
* =======================
*
* Overview:
* Routines for reading and writing values from/to adapter
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
* offset - register offset from base I/O address
* data - for dfx_port_write_byte and dfx_port_write_long, this
* is a value to write.
* for dfx_port_read_byte and dfx_port_read_byte, this
* is a pointer to store the read value.
*
* Functional Description:
* These routines perform the correct operation to read or write
* the adapter register.
*
* EISA port block base addresses are based on the slot number in which the
* controller is installed. For example, if the EISA controller is installed
* in slot 4, the port block base address is 0x4000. If the controller is
* installed in slot 2, the port block base address is 0x2000, and so on.
* This port block can be used to access PDQ, ESIC, and DEFEA on-board
* registers using the register offsets defined in DEFXX.H.
*
* PCI port block base addresses are assigned by the PCI BIOS or system
* firmware. There is one 128 byte port block which can be accessed. It
* allows for I/O mapping of both PDQ and PFI registers using the register
* offsets defined in DEFXX.H.
*
* Return Codes:
* None
*
* Assumptions:
* bp->base_addr is a valid base I/O address for this adapter.
* offset is a valid register offset for this adapter.
*
* Side Effects:
* Rather than produce macros for these functions, these routines
* are defined using "inline" to ensure that the compiler will
* generate inline code and not waste a procedure call and return.
* This provides all the benefits of macros, but with the
* advantage of strict data type checking.
*/
static inline void dfx_port_write_byte(
DFX_board_t *bp,
int offset,
u8 data
)
{
u16 port = bp->base_addr + offset;
outb(data, port);
}
static inline void dfx_port_read_byte(
DFX_board_t *bp,
int offset,
u8 *data
)
{
u16 port = bp->base_addr + offset;
*data = inb(port);
}
static inline void dfx_port_write_long(
DFX_board_t *bp,
int offset,
u32 data
)
{
u16 port = bp->base_addr + offset;
outl(data, port);
}
static inline void dfx_port_read_long(
DFX_board_t *bp,
int offset,
u32 *data
)
{
u16 port = bp->base_addr + offset;
*data = inl(port);
}
/*
* =============
* = dfx_init_one_pci_or_eisa =
* =============
*
* Overview:
* Initializes a supported FDDI EISA or PCI controller
*
* Returns:
* Condition code
*
* Arguments:
* pdev - pointer to pci device information (NULL for EISA)
* ioaddr - pointer to port (NULL for PCI)
*
* Functional Description:
*
* Return Codes:
* 0 - This device (fddi0, fddi1, etc) configured successfully
* -EBUSY - Failed to get resources, or dfx_driver_init failed.
*
* Assumptions:
* It compiles so it should work :-( (PCI cards do :-)
*
* Side Effects:
* Device structures for FDDI adapters (fddi0, fddi1, etc) are
* initialized and the board resources are read and stored in
* the device structure.
*/
static int __devinit dfx_init_one_pci_or_eisa(struct pci_dev *pdev, long ioaddr)
{
static int version_disp;
char *print_name = DRV_NAME;
struct net_device *dev;
DFX_board_t *bp; /* board pointer */
int alloc_size; /* total buffer size used */
int err;
if (!version_disp) { /* display version info if adapter is found */
version_disp = 1; /* set display flag to TRUE so that */
printk(version); /* we only display this string ONCE */
}
if (pdev != NULL)
print_name = pci_name(pdev);
dev = alloc_fddidev(sizeof(*bp));
if (!dev) {
printk(KERN_ERR "%s: unable to allocate fddidev, aborting\n",
print_name);
return -ENOMEM;
}
/* Enable PCI device. */
if (pdev != NULL) {
err = pci_enable_device (pdev);
if (err) goto err_out;
ioaddr = pci_resource_start (pdev, 1);
}
SET_MODULE_OWNER(dev);
if (pdev != NULL)
SET_NETDEV_DEV(dev, &pdev->dev);
bp = dev->priv;
if (!request_region(ioaddr,
pdev ? PFI_K_CSR_IO_LEN : PI_ESIC_K_CSR_IO_LEN,
print_name)) {
printk(KERN_ERR "%s: Cannot reserve I/O resource "
"0x%x @ 0x%lx, aborting\n", print_name,
pdev ? PFI_K_CSR_IO_LEN : PI_ESIC_K_CSR_IO_LEN, ioaddr);
err = -EBUSY;
goto err_out;
}
/* Initialize new device structure */
dev->base_addr = ioaddr; /* save port (I/O) base address */
dev->get_stats = dfx_ctl_get_stats;
dev->open = dfx_open;
dev->stop = dfx_close;
dev->hard_start_xmit = dfx_xmt_queue_pkt;
dev->set_multicast_list = dfx_ctl_set_multicast_list;
dev->set_mac_address = dfx_ctl_set_mac_address;
if (pdev == NULL) {
/* EISA board */
bp->bus_type = DFX_BUS_TYPE_EISA;
bp->next = root_dfx_eisa_dev;
root_dfx_eisa_dev = dev;
} else {
/* PCI board */
bp->bus_type = DFX_BUS_TYPE_PCI;
bp->pci_dev = pdev;
pci_set_drvdata (pdev, dev);
pci_set_master (pdev);
}
if (dfx_driver_init(dev, print_name) != DFX_K_SUCCESS) {
err = -ENODEV;
goto err_out_region;
}
err = register_netdev(dev);
if (err)
goto err_out_kfree;
printk("%s: registered as %s\n", print_name, dev->name);
return 0;
err_out_kfree:
alloc_size = sizeof(PI_DESCR_BLOCK) +
PI_CMD_REQ_K_SIZE_MAX + PI_CMD_RSP_K_SIZE_MAX +
#ifndef DYNAMIC_BUFFERS
(bp->rcv_bufs_to_post * PI_RCV_DATA_K_SIZE_MAX) +
#endif
sizeof(PI_CONSUMER_BLOCK) +
(PI_ALIGN_K_DESC_BLK - 1);
if (bp->kmalloced)
pci_free_consistent(pdev, alloc_size,
bp->kmalloced, bp->kmalloced_dma);
err_out_region:
release_region(ioaddr, pdev ? PFI_K_CSR_IO_LEN : PI_ESIC_K_CSR_IO_LEN);
err_out:
free_netdev(dev);
return err;
}
static int __devinit dfx_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
return dfx_init_one_pci_or_eisa(pdev, 0);
}
static int __init dfx_eisa_init(void)
{
int rc = -ENODEV;
int i; /* used in for loops */
u16 port; /* temporary I/O (port) address */
u32 slot_id; /* EISA hardware (slot) ID read from adapter */
DBG_printk("In dfx_eisa_init...\n");
/* Scan for FDDI EISA controllers */
for (i=0; i < DFX_MAX_EISA_SLOTS; i++) /* only scan for up to 16 EISA slots */
{
port = (i << 12) + PI_ESIC_K_SLOT_ID; /* port = I/O address for reading slot ID */
slot_id = inl(port); /* read EISA HW (slot) ID */
if ((slot_id & 0xF0FFFFFF) == DEFEA_PRODUCT_ID)
{
port = (i << 12); /* recalc base addr */
if (dfx_init_one_pci_or_eisa(NULL, port) == 0) rc = 0;
}
}
return rc;
}
/*
* ================
* = dfx_bus_init =
* ================
*
* Overview:
* Initializes EISA and PCI controller bus-specific logic.
*
* Returns:
* None
*
* Arguments:
* dev - pointer to device information
*
* Functional Description:
* Determine and save adapter IRQ in device table,
* then perform bus-specific logic initialization.
*
* Return Codes:
* None
*
* Assumptions:
* dev->base_addr has already been set with the proper
* base I/O address for this device.
*
* Side Effects:
* Interrupts are enabled at the adapter bus-specific logic.
* Note: Interrupts at the DMA engine (PDQ chip) are not
* enabled yet.
*/
static void __devinit dfx_bus_init(struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
u8 val; /* used for I/O read/writes */
DBG_printk("In dfx_bus_init...\n");
/*
* Initialize base I/O address field in bp structure
*
* Note: bp->base_addr is the same as dev->base_addr.
* It's useful because often we'll need to read
* or write registers where we already have the
* bp pointer instead of the dev pointer. Having
* the base address in the bp structure will
* save a pointer dereference.
*
* IMPORTANT!! This field must be defined before
* any of the dfx_port_* inline functions are
* called.
*/
bp->base_addr = dev->base_addr;
/* And a pointer back to the net_device struct */
bp->dev = dev;
/* Initialize adapter based on bus type */
if (bp->bus_type == DFX_BUS_TYPE_EISA)
{
/* Get the interrupt level from the ESIC chip */
dfx_port_read_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, &val);
switch ((val & PI_CONFIG_STAT_0_M_IRQ) >> PI_CONFIG_STAT_0_V_IRQ)
{
case PI_CONFIG_STAT_0_IRQ_K_9:
dev->irq = 9;
break;
case PI_CONFIG_STAT_0_IRQ_K_10:
dev->irq = 10;
break;
case PI_CONFIG_STAT_0_IRQ_K_11:
dev->irq = 11;
break;
case PI_CONFIG_STAT_0_IRQ_K_15:
dev->irq = 15;
break;
}
/* Enable access to I/O on the board by writing 0x03 to Function Control Register */
dfx_port_write_byte(bp, PI_ESIC_K_FUNCTION_CNTRL, PI_ESIC_K_FUNCTION_CNTRL_IO_ENB);
/* Set the I/O decode range of the board */
val = ((dev->base_addr >> 12) << PI_IO_CMP_V_SLOT);
dfx_port_write_byte(bp, PI_ESIC_K_IO_CMP_0_1, val);
dfx_port_write_byte(bp, PI_ESIC_K_IO_CMP_1_1, val);
/* Enable access to rest of module (including PDQ and packet memory) */
dfx_port_write_byte(bp, PI_ESIC_K_SLOT_CNTRL, PI_SLOT_CNTRL_M_ENB);
/*
* Map PDQ registers into I/O space. This is done by clearing a bit
* in Burst Holdoff register.
*/
dfx_port_read_byte(bp, PI_ESIC_K_BURST_HOLDOFF, &val);
dfx_port_write_byte(bp, PI_ESIC_K_BURST_HOLDOFF, (val & ~PI_BURST_HOLDOFF_M_MEM_MAP));
/* Enable interrupts at EISA bus interface chip (ESIC) */
dfx_port_read_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, &val);
dfx_port_write_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, (val | PI_CONFIG_STAT_0_M_INT_ENB));
}
else
{
struct pci_dev *pdev = bp->pci_dev;
/* Get the interrupt level from the PCI Configuration Table */
dev->irq = pdev->irq;
/* Check Latency Timer and set if less than minimal */
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &val);
if (val < PFI_K_LAT_TIMER_MIN) /* if less than min, override with default */
{
val = PFI_K_LAT_TIMER_DEF;
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, val);
}
/* Enable interrupts at PCI bus interface chip (PFI) */
dfx_port_write_long(bp, PFI_K_REG_MODE_CTRL, (PFI_MODE_M_PDQ_INT_ENB | PFI_MODE_M_DMA_ENB));
}
}
/*
* ========================
* = dfx_bus_config_check =
* ========================
*
* Overview:
* Checks the configuration (burst size, full-duplex, etc.) If any parameters
* are illegal, then this routine will set new defaults.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* For Revision 1 FDDI EISA, Revision 2 or later FDDI EISA with rev E or later
* PDQ, and all FDDI PCI controllers, all values are legal.
*
* Return Codes:
* None
*
* Assumptions:
* dfx_adap_init has NOT been called yet so burst size and other items have
* not been set.
*
* Side Effects:
* None
*/
static void __devinit dfx_bus_config_check(DFX_board_t *bp)
{
int status; /* return code from adapter port control call */
u32 slot_id; /* EISA-bus hardware id (DEC3001, DEC3002,...) */
u32 host_data; /* LW data returned from port control call */
DBG_printk("In dfx_bus_config_check...\n");
/* Configuration check only valid for EISA adapter */
if (bp->bus_type == DFX_BUS_TYPE_EISA)
{
dfx_port_read_long(bp, PI_ESIC_K_SLOT_ID, &slot_id);
/*
* First check if revision 2 EISA controller. Rev. 1 cards used
* PDQ revision B, so no workaround needed in this case. Rev. 3
* cards used PDQ revision E, so no workaround needed in this
* case, either. Only Rev. 2 cards used either Rev. D or E
* chips, so we must verify the chip revision on Rev. 2 cards.
*/
if (slot_id == DEFEA_PROD_ID_2)
{
/*
* Revision 2 FDDI EISA controller found, so let's check PDQ
* revision of adapter.
*/
status = dfx_hw_port_ctrl_req(bp,
PI_PCTRL_M_SUB_CMD,
PI_SUB_CMD_K_PDQ_REV_GET,
0,
&host_data);
if ((status != DFX_K_SUCCESS) || (host_data == 2))
{
/*
* Either we couldn't determine the PDQ revision, or
* we determined that it is at revision D. In either case,
* we need to implement the workaround.
*/
/* Ensure that the burst size is set to 8 longwords or less */
switch (bp->burst_size)
{
case PI_PDATA_B_DMA_BURST_SIZE_32:
case PI_PDATA_B_DMA_BURST_SIZE_16:
bp->burst_size = PI_PDATA_B_DMA_BURST_SIZE_8;
break;
default:
break;
}
/* Ensure that full-duplex mode is not enabled */
bp->full_duplex_enb = PI_SNMP_K_FALSE;
}
}
}
}
/*
* ===================
* = dfx_driver_init =
* ===================
*
* Overview:
* Initializes remaining adapter board structure information
* and makes sure adapter is in a safe state prior to dfx_open().
*
* Returns:
* Condition code
*
* Arguments:
* dev - pointer to device information
* print_name - printable device name
*
* Functional Description:
* This function allocates additional resources such as the host memory
* blocks needed by the adapter (eg. descriptor and consumer blocks).
* Remaining bus initialization steps are also completed. The adapter
* is also reset so that it is in the DMA_UNAVAILABLE state. The OS
* must call dfx_open() to open the adapter and bring it on-line.
*
* Return Codes:
* DFX_K_SUCCESS - initialization succeeded
* DFX_K_FAILURE - initialization failed - could not allocate memory
* or read adapter MAC address
*
* Assumptions:
* Memory allocated from pci_alloc_consistent() call is physically
* contiguous, locked memory.
*
* Side Effects:
* Adapter is reset and should be in DMA_UNAVAILABLE state before
* returning from this routine.
*/
static int __devinit dfx_driver_init(struct net_device *dev,
const char *print_name)
{
DFX_board_t *bp = dev->priv;
int alloc_size; /* total buffer size needed */
char *top_v, *curr_v; /* virtual addrs into memory block */
dma_addr_t top_p, curr_p; /* physical addrs into memory block */
u32 data; /* host data register value */
DBG_printk("In dfx_driver_init...\n");
/* Initialize bus-specific hardware registers */
dfx_bus_init(dev);
/*
* Initialize default values for configurable parameters
*
* Note: All of these parameters are ones that a user may
* want to customize. It'd be nice to break these
* out into Space.c or someplace else that's more
* accessible/understandable than this file.
*/
bp->full_duplex_enb = PI_SNMP_K_FALSE;
bp->req_ttrt = 8 * 12500; /* 8ms in 80 nanosec units */
bp->burst_size = PI_PDATA_B_DMA_BURST_SIZE_DEF;
bp->rcv_bufs_to_post = RCV_BUFS_DEF;
/*
* Ensure that HW configuration is OK
*
* Note: Depending on the hardware revision, we may need to modify
* some of the configurable parameters to workaround hardware
* limitations. We'll perform this configuration check AFTER
* setting the parameters to their default values.
*/
dfx_bus_config_check(bp);
/* Disable PDQ interrupts first */
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_DISABLE_ALL_INTS);
/* Place adapter in DMA_UNAVAILABLE state by resetting adapter */
(void) dfx_hw_dma_uninit(bp, PI_PDATA_A_RESET_M_SKIP_ST);
/* Read the factory MAC address from the adapter then save it */
if (dfx_hw_port_ctrl_req(bp, PI_PCTRL_M_MLA, PI_PDATA_A_MLA_K_LO, 0,
&data) != DFX_K_SUCCESS) {
printk("%s: Could not read adapter factory MAC address!\n",
print_name);
return(DFX_K_FAILURE);
}
memcpy(&bp->factory_mac_addr[0], &data, sizeof(u32));
if (dfx_hw_port_ctrl_req(bp, PI_PCTRL_M_MLA, PI_PDATA_A_MLA_K_HI, 0,
&data) != DFX_K_SUCCESS) {
printk("%s: Could not read adapter factory MAC address!\n",
print_name);
return(DFX_K_FAILURE);
}
memcpy(&bp->factory_mac_addr[4], &data, sizeof(u16));
/*
* Set current address to factory address
*
* Note: Node address override support is handled through
* dfx_ctl_set_mac_address.
*/
memcpy(dev->dev_addr, bp->factory_mac_addr, FDDI_K_ALEN);
if (bp->bus_type == DFX_BUS_TYPE_EISA)
printk("%s: DEFEA at I/O addr = 0x%lX, IRQ = %d, "
"Hardware addr = %02X-%02X-%02X-%02X-%02X-%02X\n",
print_name, dev->base_addr, dev->irq,
dev->dev_addr[0], dev->dev_addr[1],
dev->dev_addr[2], dev->dev_addr[3],
dev->dev_addr[4], dev->dev_addr[5]);
else
printk("%s: DEFPA at I/O addr = 0x%lX, IRQ = %d, "
"Hardware addr = %02X-%02X-%02X-%02X-%02X-%02X\n",
print_name, dev->base_addr, dev->irq,
dev->dev_addr[0], dev->dev_addr[1],
dev->dev_addr[2], dev->dev_addr[3],
dev->dev_addr[4], dev->dev_addr[5]);
/*
* Get memory for descriptor block, consumer block, and other buffers
* that need to be DMA read or written to by the adapter.
*/
alloc_size = sizeof(PI_DESCR_BLOCK) +
PI_CMD_REQ_K_SIZE_MAX +
PI_CMD_RSP_K_SIZE_MAX +
#ifndef DYNAMIC_BUFFERS
(bp->rcv_bufs_to_post * PI_RCV_DATA_K_SIZE_MAX) +
#endif
sizeof(PI_CONSUMER_BLOCK) +
(PI_ALIGN_K_DESC_BLK - 1);
bp->kmalloced = top_v = pci_alloc_consistent(bp->pci_dev, alloc_size,
&bp->kmalloced_dma);
if (top_v == NULL) {
printk("%s: Could not allocate memory for host buffers "
"and structures!\n", print_name);
return(DFX_K_FAILURE);
}
memset(top_v, 0, alloc_size); /* zero out memory before continuing */
top_p = bp->kmalloced_dma; /* get physical address of buffer */
/*
* To guarantee the 8K alignment required for the descriptor block, 8K - 1
* plus the amount of memory needed was allocated. The physical address
* is now 8K aligned. By carving up the memory in a specific order,
* we'll guarantee the alignment requirements for all other structures.
*
* Note: If the assumptions change regarding the non-paged, non-cached,
* physically contiguous nature of the memory block or the address
* alignments, then we'll need to implement a different algorithm
* for allocating the needed memory.
*/
curr_p = ALIGN(top_p, PI_ALIGN_K_DESC_BLK);
curr_v = top_v + (curr_p - top_p);
/* Reserve space for descriptor block */
bp->descr_block_virt = (PI_DESCR_BLOCK *) curr_v;
bp->descr_block_phys = curr_p;
curr_v += sizeof(PI_DESCR_BLOCK);
curr_p += sizeof(PI_DESCR_BLOCK);
/* Reserve space for command request buffer */
bp->cmd_req_virt = (PI_DMA_CMD_REQ *) curr_v;
bp->cmd_req_phys = curr_p;
curr_v += PI_CMD_REQ_K_SIZE_MAX;
curr_p += PI_CMD_REQ_K_SIZE_MAX;
/* Reserve space for command response buffer */
bp->cmd_rsp_virt = (PI_DMA_CMD_RSP *) curr_v;
bp->cmd_rsp_phys = curr_p;
curr_v += PI_CMD_RSP_K_SIZE_MAX;
curr_p += PI_CMD_RSP_K_SIZE_MAX;
/* Reserve space for the LLC host receive queue buffers */
bp->rcv_block_virt = curr_v;
bp->rcv_block_phys = curr_p;
#ifndef DYNAMIC_BUFFERS
curr_v += (bp->rcv_bufs_to_post * PI_RCV_DATA_K_SIZE_MAX);
curr_p += (bp->rcv_bufs_to_post * PI_RCV_DATA_K_SIZE_MAX);
#endif
/* Reserve space for the consumer block */
bp->cons_block_virt = (PI_CONSUMER_BLOCK *) curr_v;
bp->cons_block_phys = curr_p;
/* Display virtual and physical addresses if debug driver */
DBG_printk("%s: Descriptor block virt = %0lX, phys = %0X\n",
print_name,
(long)bp->descr_block_virt, bp->descr_block_phys);
DBG_printk("%s: Command Request buffer virt = %0lX, phys = %0X\n",
print_name, (long)bp->cmd_req_virt, bp->cmd_req_phys);
DBG_printk("%s: Command Response buffer virt = %0lX, phys = %0X\n",
print_name, (long)bp->cmd_rsp_virt, bp->cmd_rsp_phys);
DBG_printk("%s: Receive buffer block virt = %0lX, phys = %0X\n",
print_name, (long)bp->rcv_block_virt, bp->rcv_block_phys);
DBG_printk("%s: Consumer block virt = %0lX, phys = %0X\n",
print_name, (long)bp->cons_block_virt, bp->cons_block_phys);
return(DFX_K_SUCCESS);
}
/*
* =================
* = dfx_adap_init =
* =================
*
* Overview:
* Brings the adapter to the link avail/link unavailable state.
*
* Returns:
* Condition code
*
* Arguments:
* bp - pointer to board information
* get_buffers - non-zero if buffers to be allocated
*
* Functional Description:
* Issues the low-level firmware/hardware calls necessary to bring
* the adapter up, or to properly reset and restore adapter during
* run-time.
*
* Return Codes:
* DFX_K_SUCCESS - Adapter brought up successfully
* DFX_K_FAILURE - Adapter initialization failed
*
* Assumptions:
* bp->reset_type should be set to a valid reset type value before
* calling this routine.
*
* Side Effects:
* Adapter should be in LINK_AVAILABLE or LINK_UNAVAILABLE state
* upon a successful return of this routine.
*/
static int dfx_adap_init(DFX_board_t *bp, int get_buffers)
{
DBG_printk("In dfx_adap_init...\n");
/* Disable PDQ interrupts first */
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_DISABLE_ALL_INTS);
/* Place adapter in DMA_UNAVAILABLE state by resetting adapter */
if (dfx_hw_dma_uninit(bp, bp->reset_type) != DFX_K_SUCCESS)
{
printk("%s: Could not uninitialize/reset adapter!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/*
* When the PDQ is reset, some false Type 0 interrupts may be pending,
* so we'll acknowledge all Type 0 interrupts now before continuing.
*/
dfx_port_write_long(bp, PI_PDQ_K_REG_TYPE_0_STATUS, PI_HOST_INT_K_ACK_ALL_TYPE_0);
/*
* Clear Type 1 and Type 2 registers before going to DMA_AVAILABLE state
*
* Note: We only need to clear host copies of these registers. The PDQ reset
* takes care of the on-board register values.
*/
bp->cmd_req_reg.lword = 0;
bp->cmd_rsp_reg.lword = 0;
bp->rcv_xmt_reg.lword = 0;
/* Clear consumer block before going to DMA_AVAILABLE state */
memset(bp->cons_block_virt, 0, sizeof(PI_CONSUMER_BLOCK));
/* Initialize the DMA Burst Size */
if (dfx_hw_port_ctrl_req(bp,
PI_PCTRL_M_SUB_CMD,
PI_SUB_CMD_K_BURST_SIZE_SET,
bp->burst_size,
NULL) != DFX_K_SUCCESS)
{
printk("%s: Could not set adapter burst size!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/*
* Set base address of Consumer Block
*
* Assumption: 32-bit physical address of consumer block is 64 byte
* aligned. That is, bits 0-5 of the address must be zero.
*/
if (dfx_hw_port_ctrl_req(bp,
PI_PCTRL_M_CONS_BLOCK,
bp->cons_block_phys,
0,
NULL) != DFX_K_SUCCESS)
{
printk("%s: Could not set consumer block address!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/*
* Set base address of Descriptor Block and bring adapter to DMA_AVAILABLE state
*
* Note: We also set the literal and data swapping requirements in this
* command. Since this driver presently runs on Intel platforms
* which are Little Endian, we'll tell the adapter to byte swap
* data only. This code will need to change when we support
* Big Endian systems (eg. PowerPC).
*
* Assumption: 32-bit physical address of descriptor block is 8Kbyte
* aligned. That is, bits 0-12 of the address must be zero.
*/
if (dfx_hw_port_ctrl_req(bp,
PI_PCTRL_M_INIT,
(u32) (bp->descr_block_phys | PI_PDATA_A_INIT_M_BSWAP_DATA),
0,
NULL) != DFX_K_SUCCESS)
{
printk("%s: Could not set descriptor block address!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/* Set transmit flush timeout value */
bp->cmd_req_virt->cmd_type = PI_CMD_K_CHARS_SET;
bp->cmd_req_virt->char_set.item[0].item_code = PI_ITEM_K_FLUSH_TIME;
bp->cmd_req_virt->char_set.item[0].value = 3; /* 3 seconds */
bp->cmd_req_virt->char_set.item[0].item_index = 0;
bp->cmd_req_virt->char_set.item[1].item_code = PI_ITEM_K_EOL;
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
{
printk("%s: DMA command request failed!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/* Set the initial values for eFDXEnable and MACTReq MIB objects */
bp->cmd_req_virt->cmd_type = PI_CMD_K_SNMP_SET;
bp->cmd_req_virt->snmp_set.item[0].item_code = PI_ITEM_K_FDX_ENB_DIS;
bp->cmd_req_virt->snmp_set.item[0].value = bp->full_duplex_enb;
bp->cmd_req_virt->snmp_set.item[0].item_index = 0;
bp->cmd_req_virt->snmp_set.item[1].item_code = PI_ITEM_K_MAC_T_REQ;
bp->cmd_req_virt->snmp_set.item[1].value = bp->req_ttrt;
bp->cmd_req_virt->snmp_set.item[1].item_index = 0;
bp->cmd_req_virt->snmp_set.item[2].item_code = PI_ITEM_K_EOL;
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
{
printk("%s: DMA command request failed!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/* Initialize adapter CAM */
if (dfx_ctl_update_cam(bp) != DFX_K_SUCCESS)
{
printk("%s: Adapter CAM update failed!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/* Initialize adapter filters */
if (dfx_ctl_update_filters(bp) != DFX_K_SUCCESS)
{
printk("%s: Adapter filters update failed!\n", bp->dev->name);
return(DFX_K_FAILURE);
}
/*
* Remove any existing dynamic buffers (i.e. if the adapter is being
* reinitialized)
*/
if (get_buffers)
dfx_rcv_flush(bp);
/* Initialize receive descriptor block and produce buffers */
if (dfx_rcv_init(bp, get_buffers))
{
printk("%s: Receive buffer allocation failed\n", bp->dev->name);
if (get_buffers)
dfx_rcv_flush(bp);
return(DFX_K_FAILURE);
}
/* Issue START command and bring adapter to LINK_(UN)AVAILABLE state */
bp->cmd_req_virt->cmd_type = PI_CMD_K_START;
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
{
printk("%s: Start command failed\n", bp->dev->name);
if (get_buffers)
dfx_rcv_flush(bp);
return(DFX_K_FAILURE);
}
/* Initialization succeeded, reenable PDQ interrupts */
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_ENABLE_DEF_INTS);
return(DFX_K_SUCCESS);
}
/*
* ============
* = dfx_open =
* ============
*
* Overview:
* Opens the adapter
*
* Returns:
* Condition code
*
* Arguments:
* dev - pointer to device information
*
* Functional Description:
* This function brings the adapter to an operational state.
*
* Return Codes:
* 0 - Adapter was successfully opened
* -EAGAIN - Could not register IRQ or adapter initialization failed
*
* Assumptions:
* This routine should only be called for a device that was
* initialized successfully.
*
* Side Effects:
* Adapter should be in LINK_AVAILABLE or LINK_UNAVAILABLE state
* if the open is successful.
*/
static int dfx_open(struct net_device *dev)
{
int ret;
DFX_board_t *bp = dev->priv;
DBG_printk("In dfx_open...\n");
/* Register IRQ - support shared interrupts by passing device ptr */
ret = request_irq(dev->irq, dfx_interrupt, SA_SHIRQ, dev->name, dev);
if (ret) {
printk(KERN_ERR "%s: Requested IRQ %d is busy\n", dev->name, dev->irq);
return ret;
}
/*
* Set current address to factory MAC address
*
* Note: We've already done this step in dfx_driver_init.
* However, it's possible that a user has set a node
* address override, then closed and reopened the
* adapter. Unless we reset the device address field
* now, we'll continue to use the existing modified
* address.
*/
memcpy(dev->dev_addr, bp->factory_mac_addr, FDDI_K_ALEN);
/* Clear local unicast/multicast address tables and counts */
memset(bp->uc_table, 0, sizeof(bp->uc_table));
memset(bp->mc_table, 0, sizeof(bp->mc_table));
bp->uc_count = 0;
bp->mc_count = 0;
/* Disable promiscuous filter settings */
bp->ind_group_prom = PI_FSTATE_K_BLOCK;
bp->group_prom = PI_FSTATE_K_BLOCK;
spin_lock_init(&bp->lock);
/* Reset and initialize adapter */
bp->reset_type = PI_PDATA_A_RESET_M_SKIP_ST; /* skip self-test */
if (dfx_adap_init(bp, 1) != DFX_K_SUCCESS)
{
printk(KERN_ERR "%s: Adapter open failed!\n", dev->name);
free_irq(dev->irq, dev);
return -EAGAIN;
}
/* Set device structure info */
netif_start_queue(dev);
return(0);
}
/*
* =============
* = dfx_close =
* =============
*
* Overview:
* Closes the device/module.
*
* Returns:
* Condition code
*
* Arguments:
* dev - pointer to device information
*
* Functional Description:
* This routine closes the adapter and brings it to a safe state.
* The interrupt service routine is deregistered with the OS.
* The adapter can be opened again with another call to dfx_open().
*
* Return Codes:
* Always return 0.
*
* Assumptions:
* No further requests for this adapter are made after this routine is
* called. dfx_open() can be called to reset and reinitialize the
* adapter.
*
* Side Effects:
* Adapter should be in DMA_UNAVAILABLE state upon completion of this
* routine.
*/
static int dfx_close(struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
DBG_printk("In dfx_close...\n");
/* Disable PDQ interrupts first */
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_DISABLE_ALL_INTS);
/* Place adapter in DMA_UNAVAILABLE state by resetting adapter */
(void) dfx_hw_dma_uninit(bp, PI_PDATA_A_RESET_M_SKIP_ST);
/*
* Flush any pending transmit buffers
*
* Note: It's important that we flush the transmit buffers
* BEFORE we clear our copy of the Type 2 register.
* Otherwise, we'll have no idea how many buffers
* we need to free.
*/
dfx_xmt_flush(bp);
/*
* Clear Type 1 and Type 2 registers after adapter reset
*
* Note: Even though we're closing the adapter, it's
* possible that an interrupt will occur after
* dfx_close is called. Without some assurance to
* the contrary we want to make sure that we don't
* process receive and transmit LLC frames and update
* the Type 2 register with bad information.
*/
bp->cmd_req_reg.lword = 0;
bp->cmd_rsp_reg.lword = 0;
bp->rcv_xmt_reg.lword = 0;
/* Clear consumer block for the same reason given above */
memset(bp->cons_block_virt, 0, sizeof(PI_CONSUMER_BLOCK));
/* Release all dynamically allocate skb in the receive ring. */
dfx_rcv_flush(bp);
/* Clear device structure flags */
netif_stop_queue(dev);
/* Deregister (free) IRQ */
free_irq(dev->irq, dev);
return(0);
}
/*
* ======================
* = dfx_int_pr_halt_id =
* ======================
*
* Overview:
* Displays halt id's in string form.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Determine current halt id and display appropriate string.
*
* Return Codes:
* None
*
* Assumptions:
* None
*
* Side Effects:
* None
*/
static void dfx_int_pr_halt_id(DFX_board_t *bp)
{
PI_UINT32 port_status; /* PDQ port status register value */
PI_UINT32 halt_id; /* PDQ port status halt ID */
/* Read the latest port status */
dfx_port_read_long(bp, PI_PDQ_K_REG_PORT_STATUS, &port_status);
/* Display halt state transition information */
halt_id = (port_status & PI_PSTATUS_M_HALT_ID) >> PI_PSTATUS_V_HALT_ID;
switch (halt_id)
{
case PI_HALT_ID_K_SELFTEST_TIMEOUT:
printk("%s: Halt ID: Selftest Timeout\n", bp->dev->name);
break;
case PI_HALT_ID_K_PARITY_ERROR:
printk("%s: Halt ID: Host Bus Parity Error\n", bp->dev->name);
break;
case PI_HALT_ID_K_HOST_DIR_HALT:
printk("%s: Halt ID: Host-Directed Halt\n", bp->dev->name);
break;
case PI_HALT_ID_K_SW_FAULT:
printk("%s: Halt ID: Adapter Software Fault\n", bp->dev->name);
break;
case PI_HALT_ID_K_HW_FAULT:
printk("%s: Halt ID: Adapter Hardware Fault\n", bp->dev->name);
break;
case PI_HALT_ID_K_PC_TRACE:
printk("%s: Halt ID: FDDI Network PC Trace Path Test\n", bp->dev->name);
break;
case PI_HALT_ID_K_DMA_ERROR:
printk("%s: Halt ID: Adapter DMA Error\n", bp->dev->name);
break;
case PI_HALT_ID_K_IMAGE_CRC_ERROR:
printk("%s: Halt ID: Firmware Image CRC Error\n", bp->dev->name);
break;
case PI_HALT_ID_K_BUS_EXCEPTION:
printk("%s: Halt ID: 68000 Bus Exception\n", bp->dev->name);
break;
default:
printk("%s: Halt ID: Unknown (code = %X)\n", bp->dev->name, halt_id);
break;
}
}
/*
* ==========================
* = dfx_int_type_0_process =
* ==========================
*
* Overview:
* Processes Type 0 interrupts.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Processes all enabled Type 0 interrupts. If the reason for the interrupt
* is a serious fault on the adapter, then an error message is displayed
* and the adapter is reset.
*
* One tricky potential timing window is the rapid succession of "link avail"
* "link unavail" state change interrupts. The acknowledgement of the Type 0
* interrupt must be done before reading the state from the Port Status
* register. This is true because a state change could occur after reading
* the data, but before acknowledging the interrupt. If this state change
* does happen, it would be lost because the driver is using the old state,
* and it will never know about the new state because it subsequently
* acknowledges the state change interrupt.
*
* INCORRECT CORRECT
* read type 0 int reasons read type 0 int reasons
* read adapter state ack type 0 interrupts
* ack type 0 interrupts read adapter state
* ... process interrupt ... ... process interrupt ...
*
* Return Codes:
* None
*
* Assumptions:
* None
*
* Side Effects:
* An adapter reset may occur if the adapter has any Type 0 error interrupts
* or if the port status indicates that the adapter is halted. The driver
* is responsible for reinitializing the adapter with the current CAM
* contents and adapter filter settings.
*/
static void dfx_int_type_0_process(DFX_board_t *bp)
{
PI_UINT32 type_0_status; /* Host Interrupt Type 0 register */
PI_UINT32 state; /* current adap state (from port status) */
/*
* Read host interrupt Type 0 register to determine which Type 0
* interrupts are pending. Immediately write it back out to clear
* those interrupts.
*/
dfx_port_read_long(bp, PI_PDQ_K_REG_TYPE_0_STATUS, &type_0_status);
dfx_port_write_long(bp, PI_PDQ_K_REG_TYPE_0_STATUS, type_0_status);
/* Check for Type 0 error interrupts */
if (type_0_status & (PI_TYPE_0_STAT_M_NXM |
PI_TYPE_0_STAT_M_PM_PAR_ERR |
PI_TYPE_0_STAT_M_BUS_PAR_ERR))
{
/* Check for Non-Existent Memory error */
if (type_0_status & PI_TYPE_0_STAT_M_NXM)
printk("%s: Non-Existent Memory Access Error\n", bp->dev->name);
/* Check for Packet Memory Parity error */
if (type_0_status & PI_TYPE_0_STAT_M_PM_PAR_ERR)
printk("%s: Packet Memory Parity Error\n", bp->dev->name);
/* Check for Host Bus Parity error */
if (type_0_status & PI_TYPE_0_STAT_M_BUS_PAR_ERR)
printk("%s: Host Bus Parity Error\n", bp->dev->name);
/* Reset adapter and bring it back on-line */
bp->link_available = PI_K_FALSE; /* link is no longer available */
bp->reset_type = 0; /* rerun on-board diagnostics */
printk("%s: Resetting adapter...\n", bp->dev->name);
if (dfx_adap_init(bp, 0) != DFX_K_SUCCESS)
{
printk("%s: Adapter reset failed! Disabling adapter interrupts.\n", bp->dev->name);
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_DISABLE_ALL_INTS);
return;
}
printk("%s: Adapter reset successful!\n", bp->dev->name);
return;
}
/* Check for transmit flush interrupt */
if (type_0_status & PI_TYPE_0_STAT_M_XMT_FLUSH)
{
/* Flush any pending xmt's and acknowledge the flush interrupt */
bp->link_available = PI_K_FALSE; /* link is no longer available */
dfx_xmt_flush(bp); /* flush any outstanding packets */
(void) dfx_hw_port_ctrl_req(bp,
PI_PCTRL_M_XMT_DATA_FLUSH_DONE,
0,
0,
NULL);
}
/* Check for adapter state change */
if (type_0_status & PI_TYPE_0_STAT_M_STATE_CHANGE)
{
/* Get latest adapter state */
state = dfx_hw_adap_state_rd(bp); /* get adapter state */
if (state == PI_STATE_K_HALTED)
{
/*
* Adapter has transitioned to HALTED state, try to reset
* adapter to bring it back on-line. If reset fails,
* leave the adapter in the broken state.
*/
printk("%s: Controller has transitioned to HALTED state!\n", bp->dev->name);
dfx_int_pr_halt_id(bp); /* display halt id as string */
/* Reset adapter and bring it back on-line */
bp->link_available = PI_K_FALSE; /* link is no longer available */
bp->reset_type = 0; /* rerun on-board diagnostics */
printk("%s: Resetting adapter...\n", bp->dev->name);
if (dfx_adap_init(bp, 0) != DFX_K_SUCCESS)
{
printk("%s: Adapter reset failed! Disabling adapter interrupts.\n", bp->dev->name);
dfx_port_write_long(bp, PI_PDQ_K_REG_HOST_INT_ENB, PI_HOST_INT_K_DISABLE_ALL_INTS);
return;
}
printk("%s: Adapter reset successful!\n", bp->dev->name);
}
else if (state == PI_STATE_K_LINK_AVAIL)
{
bp->link_available = PI_K_TRUE; /* set link available flag */
}
}
}
/*
* ==================
* = dfx_int_common =
* ==================
*
* Overview:
* Interrupt service routine (ISR)
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* This is the ISR which processes incoming adapter interrupts.
*
* Return Codes:
* None
*
* Assumptions:
* This routine assumes PDQ interrupts have not been disabled.
* When interrupts are disabled at the PDQ, the Port Status register
* is automatically cleared. This routine uses the Port Status
* register value to determine whether a Type 0 interrupt occurred,
* so it's important that adapter interrupts are not normally
* enabled/disabled at the PDQ.
*
* It's vital that this routine is NOT reentered for the
* same board and that the OS is not in another section of
* code (eg. dfx_xmt_queue_pkt) for the same board on a
* different thread.
*
* Side Effects:
* Pending interrupts are serviced. Depending on the type of
* interrupt, acknowledging and clearing the interrupt at the
* PDQ involves writing a register to clear the interrupt bit
* or updating completion indices.
*/
static void dfx_int_common(struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
PI_UINT32 port_status; /* Port Status register */
/* Process xmt interrupts - frequent case, so always call this routine */
if(dfx_xmt_done(bp)) /* free consumed xmt packets */
netif_wake_queue(dev);
/* Process rcv interrupts - frequent case, so always call this routine */
dfx_rcv_queue_process(bp); /* service received LLC frames */
/*
* Transmit and receive producer and completion indices are updated on the
* adapter by writing to the Type 2 Producer register. Since the frequent
* case is that we'll be processing either LLC transmit or receive buffers,
* we'll optimize I/O writes by doing a single register write here.
*/
dfx_port_write_long(bp, PI_PDQ_K_REG_TYPE_2_PROD, bp->rcv_xmt_reg.lword);
/* Read PDQ Port Status register to find out which interrupts need processing */
dfx_port_read_long(bp, PI_PDQ_K_REG_PORT_STATUS, &port_status);
/* Process Type 0 interrupts (if any) - infrequent, so only call when needed */
if (port_status & PI_PSTATUS_M_TYPE_0_PENDING)
dfx_int_type_0_process(bp); /* process Type 0 interrupts */
}
/*
* =================
* = dfx_interrupt =
* =================
*
* Overview:
* Interrupt processing routine
*
* Returns:
* Whether a valid interrupt was seen.
*
* Arguments:
* irq - interrupt vector
* dev_id - pointer to device information
* regs - pointer to registers structure
*
* Functional Description:
* This routine calls the interrupt processing routine for this adapter. It
* disables and reenables adapter interrupts, as appropriate. We can support
* shared interrupts since the incoming dev_id pointer provides our device
* structure context.
*
* Return Codes:
* IRQ_HANDLED - an IRQ was handled.
* IRQ_NONE - no IRQ was handled.
*
* Assumptions:
* The interrupt acknowledgement at the hardware level (eg. ACKing the PIC
* on Intel-based systems) is done by the operating system outside this
* routine.
*
* System interrupts are enabled through this call.
*
* Side Effects:
* Interrupts are disabled, then reenabled at the adapter.
*/
static irqreturn_t dfx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
DFX_board_t *bp; /* private board structure pointer */
/* Get board pointer only if device structure is valid */
bp = dev->priv;
/* See if we're already servicing an interrupt */
/* Service adapter interrupts */
if (bp->bus_type == DFX_BUS_TYPE_PCI) {
u32 status;
dfx_port_read_long(bp, PFI_K_REG_STATUS, &status);
if (!(status & PFI_STATUS_M_PDQ_INT))
return IRQ_NONE;
spin_lock(&bp->lock);
/* Disable PDQ-PFI interrupts at PFI */
dfx_port_write_long(bp, PFI_K_REG_MODE_CTRL,
PFI_MODE_M_DMA_ENB);
/* Call interrupt service routine for this adapter */
dfx_int_common(dev);
/* Clear PDQ interrupt status bit and reenable interrupts */
dfx_port_write_long(bp, PFI_K_REG_STATUS,
PFI_STATUS_M_PDQ_INT);
dfx_port_write_long(bp, PFI_K_REG_MODE_CTRL,
(PFI_MODE_M_PDQ_INT_ENB |
PFI_MODE_M_DMA_ENB));
spin_unlock(&bp->lock);
} else {
u8 status;
dfx_port_read_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, &status);
if (!(status & PI_CONFIG_STAT_0_M_PEND))
return IRQ_NONE;
spin_lock(&bp->lock);
/* Disable interrupts at the ESIC */
status &= ~PI_CONFIG_STAT_0_M_INT_ENB;
dfx_port_write_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, status);
/* Call interrupt service routine for this adapter */
dfx_int_common(dev);
/* Reenable interrupts at the ESIC */
dfx_port_read_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, &status);
status |= PI_CONFIG_STAT_0_M_INT_ENB;
dfx_port_write_byte(bp, PI_ESIC_K_IO_CONFIG_STAT_0, status);
spin_unlock(&bp->lock);
}
return IRQ_HANDLED;
}
/*
* =====================
* = dfx_ctl_get_stats =
* =====================
*
* Overview:
* Get statistics for FDDI adapter
*
* Returns:
* Pointer to FDDI statistics structure
*
* Arguments:
* dev - pointer to device information
*
* Functional Description:
* Gets current MIB objects from adapter, then
* returns FDDI statistics structure as defined
* in if_fddi.h.
*
* Note: Since the FDDI statistics structure is
* still new and the device structure doesn't
* have an FDDI-specific get statistics handler,
* we'll return the FDDI statistics structure as
* a pointer to an Ethernet statistics structure.
* That way, at least the first part of the statistics
* structure can be decoded properly, and it allows
* "smart" applications to perform a second cast to
* decode the FDDI-specific statistics.
*
* We'll have to pay attention to this routine as the
* device structure becomes more mature and LAN media
* independent.
*
* Return Codes:
* None
*
* Assumptions:
* None
*
* Side Effects:
* None
*/
static struct net_device_stats *dfx_ctl_get_stats(struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
/* Fill the bp->stats structure with driver-maintained counters */
bp->stats.gen.rx_packets = bp->rcv_total_frames;
bp->stats.gen.tx_packets = bp->xmt_total_frames;
bp->stats.gen.rx_bytes = bp->rcv_total_bytes;
bp->stats.gen.tx_bytes = bp->xmt_total_bytes;
bp->stats.gen.rx_errors = bp->rcv_crc_errors +
bp->rcv_frame_status_errors +
bp->rcv_length_errors;
bp->stats.gen.tx_errors = bp->xmt_length_errors;
bp->stats.gen.rx_dropped = bp->rcv_discards;
bp->stats.gen.tx_dropped = bp->xmt_discards;
bp->stats.gen.multicast = bp->rcv_multicast_frames;
bp->stats.gen.collisions = 0; /* always zero (0) for FDDI */
/* Get FDDI SMT MIB objects */
bp->cmd_req_virt->cmd_type = PI_CMD_K_SMT_MIB_GET;
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
return((struct net_device_stats *) &bp->stats);
/* Fill the bp->stats structure with the SMT MIB object values */
memcpy(bp->stats.smt_station_id, &bp->cmd_rsp_virt->smt_mib_get.smt_station_id, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_station_id));
bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id;
bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id;
bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id;
memcpy(bp->stats.smt_user_data, &bp->cmd_rsp_virt->smt_mib_get.smt_user_data, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_user_data));
bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id;
bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct;
bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct;
bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct;
bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths;
bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities;
bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy;
bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy;
bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify;
bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy;
bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration;
bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present;
bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state;
bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state;
bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag;
bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status;
bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag;
bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls;
bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls;
bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions;
bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability;
bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability;
bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths;
bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path;
memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN);
memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN);
memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN);
memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN);
bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test;
bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths;
bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type;
memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN);
bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req;
bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg;
bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max;
bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value;
bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold;
bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio;
bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state;
bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag;
bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag;
bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag;
bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available;
bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present;
bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable;
bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound;
bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound;
bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req;
memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration));
bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0];
bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1];
bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0];
bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1];
bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0];
bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1];
bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0];
bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1];
bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0];
bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1];
memcpy(&bp->stats.port_requested_paths[0*3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3);
memcpy(&bp->stats.port_requested_paths[1*3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3);
bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0];
bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1];
bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0];
bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1];
bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0];
bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1];
bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0];
bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1];
bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0];
bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1];
bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0];
bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1];
bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0];
bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1];
bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0];
bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1];
bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0];
bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1];
bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0];
bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1];
bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0];
bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1];
bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0];
bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1];
bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0];
bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1];
/* Get FDDI counters */
bp->cmd_req_virt->cmd_type = PI_CMD_K_CNTRS_GET;
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
return((struct net_device_stats *) &bp->stats);
/* Fill the bp->stats structure with the FDDI counter values */
bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls;
bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls;
bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls;
bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls;
bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls;
bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls;
bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls;
bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls;
bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls;
bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls;
bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls;
return((struct net_device_stats *) &bp->stats);
}
/*
* ==============================
* = dfx_ctl_set_multicast_list =
* ==============================
*
* Overview:
* Enable/Disable LLC frame promiscuous mode reception
* on the adapter and/or update multicast address table.
*
* Returns:
* None
*
* Arguments:
* dev - pointer to device information
*
* Functional Description:
* This routine follows a fairly simple algorithm for setting the
* adapter filters and CAM:
*
* if IFF_PROMISC flag is set
* enable LLC individual/group promiscuous mode
* else
* disable LLC individual/group promiscuous mode
* if number of incoming multicast addresses >
* (CAM max size - number of unicast addresses in CAM)
* enable LLC group promiscuous mode
* set driver-maintained multicast address count to zero
* else
* disable LLC group promiscuous mode
* set driver-maintained multicast address count to incoming count
* update adapter CAM
* update adapter filters
*
* Return Codes:
* None
*
* Assumptions:
* Multicast addresses are presented in canonical (LSB) format.
*
* Side Effects:
* On-board adapter CAM and filters are updated.
*/
static void dfx_ctl_set_multicast_list(struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
int i; /* used as index in for loop */
struct dev_mc_list *dmi; /* ptr to multicast addr entry */
/* Enable LLC frame promiscuous mode, if necessary */
if (dev->flags & IFF_PROMISC)
bp->ind_group_prom = PI_FSTATE_K_PASS; /* Enable LLC ind/group prom mode */
/* Else, update multicast address table */
else
{
bp->ind_group_prom = PI_FSTATE_K_BLOCK; /* Disable LLC ind/group prom mode */
/*
* Check whether incoming multicast address count exceeds table size
*
* Note: The adapters utilize an on-board 64 entry CAM for
* supporting perfect filtering of multicast packets
* and bridge functions when adding unicast addresses.
* There is no hash function available. To support
* additional multicast addresses, the all multicast
* filter (LLC group promiscuous mode) must be enabled.
*
* The firmware reserves two CAM entries for SMT-related
* multicast addresses, which leaves 62 entries available.
* The following code ensures that we're not being asked
* to add more than 62 addresses to the CAM. If we are,
* the driver will enable the all multicast filter.
* Should the number of multicast addresses drop below
* the high water mark, the filter will be disabled and
* perfect filtering will be used.
*/
if (dev->mc_count > (PI_CMD_ADDR_FILTER_K_SIZE - bp->uc_count))
{
bp->group_prom = PI_FSTATE_K_PASS; /* Enable LLC group prom mode */
bp->mc_count = 0; /* Don't add mc addrs to CAM */
}
else
{
bp->group_prom = PI_FSTATE_K_BLOCK; /* Disable LLC group prom mode */
bp->mc_count = dev->mc_count; /* Add mc addrs to CAM */
}
/* Copy addresses to multicast address table, then update adapter CAM */
dmi = dev->mc_list; /* point to first multicast addr */
for (i=0; i < bp->mc_count; i++)
{
memcpy(&bp->mc_table[i*FDDI_K_ALEN], dmi->dmi_addr, FDDI_K_ALEN);
dmi = dmi->next; /* point to next multicast addr */
}
if (dfx_ctl_update_cam(bp) != DFX_K_SUCCESS)
{
DBG_printk("%s: Could not update multicast address table!\n", dev->name);
}
else
{
DBG_printk("%s: Multicast address table updated! Added %d addresses.\n", dev->name, bp->mc_count);
}
}
/* Update adapter filters */
if (dfx_ctl_update_filters(bp) != DFX_K_SUCCESS)
{
DBG_printk("%s: Could not update adapter filters!\n", dev->name);
}
else
{
DBG_printk("%s: Adapter filters updated!\n", dev->name);
}
}
/*
* ===========================
* = dfx_ctl_set_mac_address =
* ===========================
*
* Overview:
* Add node address override (unicast address) to adapter
* CAM and update dev_addr field in device table.
*
* Returns:
* None
*
* Arguments:
* dev - pointer to device information
* addr - pointer to sockaddr structure containing unicast address to add
*
* Functional Description:
* The adapter supports node address overrides by adding one or more
* unicast addresses to the adapter CAM. This is similar to adding
* multicast addresses. In this routine we'll update the driver and
* device structures with the new address, then update the adapter CAM
* to ensure that the adapter will copy and strip frames destined and
* sourced by that address.
*
* Return Codes:
* Always returns zero.
*
* Assumptions:
* The address pointed to by addr->sa_data is a valid unicast
* address and is presented in canonical (LSB) format.
*
* Side Effects:
* On-board adapter CAM is updated. On-board adapter filters
* may be updated.
*/
static int dfx_ctl_set_mac_address(struct net_device *dev, void *addr)
{
DFX_board_t *bp = dev->priv;
struct sockaddr *p_sockaddr = (struct sockaddr *)addr;
/* Copy unicast address to driver-maintained structs and update count */
memcpy(dev->dev_addr, p_sockaddr->sa_data, FDDI_K_ALEN); /* update device struct */
memcpy(&bp->uc_table[0], p_sockaddr->sa_data, FDDI_K_ALEN); /* update driver struct */
bp->uc_count = 1;
/*
* Verify we're not exceeding the CAM size by adding unicast address
*
* Note: It's possible that before entering this routine we've
* already filled the CAM with 62 multicast addresses.
* Since we need to place the node address override into
* the CAM, we have to check to see that we're not
* exceeding the CAM size. If we are, we have to enable
* the LLC group (multicast) promiscuous mode filter as
* in dfx_ctl_set_multicast_list.
*/
if ((bp->uc_count + bp->mc_count) > PI_CMD_ADDR_FILTER_K_SIZE)
{
bp->group_prom = PI_FSTATE_K_PASS; /* Enable LLC group prom mode */
bp->mc_count = 0; /* Don't add mc addrs to CAM */
/* Update adapter filters */
if (dfx_ctl_update_filters(bp) != DFX_K_SUCCESS)
{
DBG_printk("%s: Could not update adapter filters!\n", dev->name);
}
else
{
DBG_printk("%s: Adapter filters updated!\n", dev->name);
}
}
/* Update adapter CAM with new unicast address */
if (dfx_ctl_update_cam(bp) != DFX_K_SUCCESS)
{
DBG_printk("%s: Could not set new MAC address!\n", dev->name);
}
else
{
DBG_printk("%s: Adapter CAM updated with new MAC address\n", dev->name);
}
return(0); /* always return zero */
}
/*
* ======================
* = dfx_ctl_update_cam =
* ======================
*
* Overview:
* Procedure to update adapter CAM (Content Addressable Memory)
* with desired unicast and multicast address entries.
*
* Returns:
* Condition code
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Updates adapter CAM with current contents of board structure
* unicast and multicast address tables. Since there are only 62
* free entries in CAM, this routine ensures that the command
* request buffer is not overrun.
*
* Return Codes:
* DFX_K_SUCCESS - Request succeeded
* DFX_K_FAILURE - Request failed
*
* Assumptions:
* All addresses being added (unicast and multicast) are in canonical
* order.
*
* Side Effects:
* On-board adapter CAM is updated.
*/
static int dfx_ctl_update_cam(DFX_board_t *bp)
{
int i; /* used as index */
PI_LAN_ADDR *p_addr; /* pointer to CAM entry */
/*
* Fill in command request information
*
* Note: Even though both the unicast and multicast address
* table entries are stored as contiguous 6 byte entries,
* the firmware address filter set command expects each
* entry to be two longwords (8 bytes total). We must be
* careful to only copy the six bytes of each unicast and
* multicast table entry into each command entry. This
* is also why we must first clear the entire command
* request buffer.
*/
memset(bp->cmd_req_virt, 0, PI_CMD_REQ_K_SIZE_MAX); /* first clear buffer */
bp->cmd_req_virt->cmd_type = PI_CMD_K_ADDR_FILTER_SET;
p_addr = &bp->cmd_req_virt->addr_filter_set.entry[0];
/* Now add unicast addresses to command request buffer, if any */
for (i=0; i < (int)bp->uc_count; i++)
{
if (i < PI_CMD_ADDR_FILTER_K_SIZE)
{
memcpy(p_addr, &bp->uc_table[i*FDDI_K_ALEN], FDDI_K_ALEN);
p_addr++; /* point to next command entry */
}
}
/* Now add multicast addresses to command request buffer, if any */
for (i=0; i < (int)bp->mc_count; i++)
{
if ((i + bp->uc_count) < PI_CMD_ADDR_FILTER_K_SIZE)
{
memcpy(p_addr, &bp->mc_table[i*FDDI_K_ALEN], FDDI_K_ALEN);
p_addr++; /* point to next command entry */
}
}
/* Issue command to update adapter CAM, then return */
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
return(DFX_K_FAILURE);
return(DFX_K_SUCCESS);
}
/*
* ==========================
* = dfx_ctl_update_filters =
* ==========================
*
* Overview:
* Procedure to update adapter filters with desired
* filter settings.
*
* Returns:
* Condition code
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Enables or disables filter using current filter settings.
*
* Return Codes:
* DFX_K_SUCCESS - Request succeeded.
* DFX_K_FAILURE - Request failed.
*
* Assumptions:
* We must always pass up packets destined to the broadcast
* address (FF-FF-FF-FF-FF-FF), so we'll always keep the
* broadcast filter enabled.
*
* Side Effects:
* On-board adapter filters are updated.
*/
static int dfx_ctl_update_filters(DFX_board_t *bp)
{
int i = 0; /* used as index */
/* Fill in command request information */
bp->cmd_req_virt->cmd_type = PI_CMD_K_FILTERS_SET;
/* Initialize Broadcast filter - * ALWAYS ENABLED * */
bp->cmd_req_virt->filter_set.item[i].item_code = PI_ITEM_K_BROADCAST;
bp->cmd_req_virt->filter_set.item[i++].value = PI_FSTATE_K_PASS;
/* Initialize LLC Individual/Group Promiscuous filter */
bp->cmd_req_virt->filter_set.item[i].item_code = PI_ITEM_K_IND_GROUP_PROM;
bp->cmd_req_virt->filter_set.item[i++].value = bp->ind_group_prom;
/* Initialize LLC Group Promiscuous filter */
bp->cmd_req_virt->filter_set.item[i].item_code = PI_ITEM_K_GROUP_PROM;
bp->cmd_req_virt->filter_set.item[i++].value = bp->group_prom;
/* Terminate the item code list */
bp->cmd_req_virt->filter_set.item[i].item_code = PI_ITEM_K_EOL;
/* Issue command to update adapter filters, then return */
if (dfx_hw_dma_cmd_req(bp) != DFX_K_SUCCESS)
return(DFX_K_FAILURE);
return(DFX_K_SUCCESS);
}
/*
* ======================
* = dfx_hw_dma_cmd_req =
* ======================
*
* Overview:
* Sends PDQ DMA command to adapter firmware
*
* Returns:
* Condition code
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* The command request and response buffers are posted to the adapter in the manner
* described in the PDQ Port Specification:
*
* 1. Command Response Buffer is posted to adapter.
* 2. Command Request Buffer is posted to adapter.
* 3. Command Request consumer index is polled until it indicates that request
* buffer has been DMA'd to adapter.
* 4. Command Response consumer index is polled until it indicates that response
* buffer has been DMA'd from adapter.
*
* This ordering ensures that a response buffer is already available for the firmware
* to use once it's done processing the request buffer.
*
* Return Codes:
* DFX_K_SUCCESS - DMA command succeeded
* DFX_K_OUTSTATE - Adapter is NOT in proper state
* DFX_K_HW_TIMEOUT - DMA command timed out
*
* Assumptions:
* Command request buffer has already been filled with desired DMA command.
*
* Side Effects:
* None
*/
static int dfx_hw_dma_cmd_req(DFX_board_t *bp)
{
int status; /* adapter status */
int timeout_cnt; /* used in for loops */
/* Make sure the adapter is in a state that we can issue the DMA command in */
status = dfx_hw_adap_state_rd(bp);
if ((status == PI_STATE_K_RESET) ||
(status == PI_STATE_K_HALTED) ||
(status == PI_STATE_K_DMA_UNAVAIL) ||
(status == PI_STATE_K_UPGRADE))
return(DFX_K_OUTSTATE);
/* Put response buffer on the command response queue */
bp->descr_block_virt->cmd_rsp[bp->cmd_rsp_reg.index.prod].long_0 = (u32) (PI_RCV_DESCR_M_SOP |
((PI_CMD_RSP_K_SIZE_MAX / PI_ALIGN_K_CMD_RSP_BUFF) << PI_RCV_DESCR_V_SEG_LEN));
bp->descr_block_virt->cmd_rsp[bp->cmd_rsp_reg.index.prod].long_1 = bp->cmd_rsp_phys;
/* Bump (and wrap) the producer index and write out to register */
bp->cmd_rsp_reg.index.prod += 1;
bp->cmd_rsp_reg.index.prod &= PI_CMD_RSP_K_NUM_ENTRIES-1;
dfx_port_write_long(bp, PI_PDQ_K_REG_CMD_RSP_PROD, bp->cmd_rsp_reg.lword);
/* Put request buffer on the command request queue */
bp->descr_block_virt->cmd_req[bp->cmd_req_reg.index.prod].long_0 = (u32) (PI_XMT_DESCR_M_SOP |
PI_XMT_DESCR_M_EOP | (PI_CMD_REQ_K_SIZE_MAX << PI_XMT_DESCR_V_SEG_LEN));
bp->descr_block_virt->cmd_req[bp->cmd_req_reg.index.prod].long_1 = bp->cmd_req_phys;
/* Bump (and wrap) the producer index and write out to register */
bp->cmd_req_reg.index.prod += 1;
bp->cmd_req_reg.index.prod &= PI_CMD_REQ_K_NUM_ENTRIES-1;
dfx_port_write_long(bp, PI_PDQ_K_REG_CMD_REQ_PROD, bp->cmd_req_reg.lword);
/*
* Here we wait for the command request consumer index to be equal
* to the producer, indicating that the adapter has DMAed the request.
*/
for (timeout_cnt = 20000; timeout_cnt > 0; timeout_cnt--)
{
if (bp->cmd_req_reg.index.prod == (u8)(bp->cons_block_virt->cmd_req))
break;
udelay(100); /* wait for 100 microseconds */
}
if (timeout_cnt == 0)
return(DFX_K_HW_TIMEOUT);
/* Bump (and wrap) the completion index and write out to register */
bp->cmd_req_reg.index.comp += 1;
bp->cmd_req_reg.index.comp &= PI_CMD_REQ_K_NUM_ENTRIES-1;
dfx_port_write_long(bp, PI_PDQ_K_REG_CMD_REQ_PROD, bp->cmd_req_reg.lword);
/*
* Here we wait for the command response consumer index to be equal
* to the producer, indicating that the adapter has DMAed the response.
*/
for (timeout_cnt = 20000; timeout_cnt > 0; timeout_cnt--)
{
if (bp->cmd_rsp_reg.index.prod == (u8)(bp->cons_block_virt->cmd_rsp))
break;
udelay(100); /* wait for 100 microseconds */
}
if (timeout_cnt == 0)
return(DFX_K_HW_TIMEOUT);
/* Bump (and wrap) the completion index and write out to register */
bp->cmd_rsp_reg.index.comp += 1;
bp->cmd_rsp_reg.index.comp &= PI_CMD_RSP_K_NUM_ENTRIES-1;
dfx_port_write_long(bp, PI_PDQ_K_REG_CMD_RSP_PROD, bp->cmd_rsp_reg.lword);
return(DFX_K_SUCCESS);
}
/*
* ========================
* = dfx_hw_port_ctrl_req =
* ========================
*
* Overview:
* Sends PDQ port control command to adapter firmware
*
* Returns:
* Host data register value in host_data if ptr is not NULL
*
* Arguments:
* bp - pointer to board information
* command - port control command
* data_a - port data A register value
* data_b - port data B register value
* host_data - ptr to host data register value
*
* Functional Description:
* Send generic port control command to adapter by writing
* to various PDQ port registers, then polling for completion.
*
* Return Codes:
* DFX_K_SUCCESS - port control command succeeded
* DFX_K_HW_TIMEOUT - port control command timed out
*
* Assumptions:
* None
*
* Side Effects:
* None
*/
static int dfx_hw_port_ctrl_req(
DFX_board_t *bp,
PI_UINT32 command,
PI_UINT32 data_a,
PI_UINT32 data_b,
PI_UINT32 *host_data
)
{
PI_UINT32 port_cmd; /* Port Control command register value */
int timeout_cnt; /* used in for loops */
/* Set Command Error bit in command longword */
port_cmd = (PI_UINT32) (command | PI_PCTRL_M_CMD_ERROR);
/* Issue port command to the adapter */
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_DATA_A, data_a);
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_DATA_B, data_b);
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_CTRL, port_cmd);
/* Now wait for command to complete */
if (command == PI_PCTRL_M_BLAST_FLASH)
timeout_cnt = 600000; /* set command timeout count to 60 seconds */
else
timeout_cnt = 20000; /* set command timeout count to 2 seconds */
for (; timeout_cnt > 0; timeout_cnt--)
{
dfx_port_read_long(bp, PI_PDQ_K_REG_PORT_CTRL, &port_cmd);
if (!(port_cmd & PI_PCTRL_M_CMD_ERROR))
break;
udelay(100); /* wait for 100 microseconds */
}
if (timeout_cnt == 0)
return(DFX_K_HW_TIMEOUT);
/*
* If the address of host_data is non-zero, assume caller has supplied a
* non NULL pointer, and return the contents of the HOST_DATA register in
* it.
*/
if (host_data != NULL)
dfx_port_read_long(bp, PI_PDQ_K_REG_HOST_DATA, host_data);
return(DFX_K_SUCCESS);
}
/*
* =====================
* = dfx_hw_adap_reset =
* =====================
*
* Overview:
* Resets adapter
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
* type - type of reset to perform
*
* Functional Description:
* Issue soft reset to adapter by writing to PDQ Port Reset
* register. Use incoming reset type to tell adapter what
* kind of reset operation to perform.
*
* Return Codes:
* None
*
* Assumptions:
* This routine merely issues a soft reset to the adapter.
* It is expected that after this routine returns, the caller
* will appropriately poll the Port Status register for the
* adapter to enter the proper state.
*
* Side Effects:
* Internal adapter registers are cleared.
*/
static void dfx_hw_adap_reset(
DFX_board_t *bp,
PI_UINT32 type
)
{
/* Set Reset type and assert reset */
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_DATA_A, type); /* tell adapter type of reset */
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_RESET, PI_RESET_M_ASSERT_RESET);
/* Wait for at least 1 Microsecond according to the spec. We wait 20 just to be safe */
udelay(20);
/* Deassert reset */
dfx_port_write_long(bp, PI_PDQ_K_REG_PORT_RESET, 0);
}
/*
* ========================
* = dfx_hw_adap_state_rd =
* ========================
*
* Overview:
* Returns current adapter state
*
* Returns:
* Adapter state per PDQ Port Specification
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Reads PDQ Port Status register and returns adapter state.
*
* Return Codes:
* None
*
* Assumptions:
* None
*
* Side Effects:
* None
*/
static int dfx_hw_adap_state_rd(DFX_board_t *bp)
{
PI_UINT32 port_status; /* Port Status register value */
dfx_port_read_long(bp, PI_PDQ_K_REG_PORT_STATUS, &port_status);
return((port_status & PI_PSTATUS_M_STATE) >> PI_PSTATUS_V_STATE);
}
/*
* =====================
* = dfx_hw_dma_uninit =
* =====================
*
* Overview:
* Brings adapter to DMA_UNAVAILABLE state
*
* Returns:
* Condition code
*
* Arguments:
* bp - pointer to board information
* type - type of reset to perform
*
* Functional Description:
* Bring adapter to DMA_UNAVAILABLE state by performing the following:
* 1. Set reset type bit in Port Data A Register then reset adapter.
* 2. Check that adapter is in DMA_UNAVAILABLE state.
*
* Return Codes:
* DFX_K_SUCCESS - adapter is in DMA_UNAVAILABLE state
* DFX_K_HW_TIMEOUT - adapter did not reset properly
*
* Assumptions:
* None
*
* Side Effects:
* Internal adapter registers are cleared.
*/
static int dfx_hw_dma_uninit(DFX_board_t *bp, PI_UINT32 type)
{
int timeout_cnt; /* used in for loops */
/* Set reset type bit and reset adapter */
dfx_hw_adap_reset(bp, type);
/* Now wait for adapter to enter DMA_UNAVAILABLE state */
for (timeout_cnt = 100000; timeout_cnt > 0; timeout_cnt--)
{
if (dfx_hw_adap_state_rd(bp) == PI_STATE_K_DMA_UNAVAIL)
break;
udelay(100); /* wait for 100 microseconds */
}
if (timeout_cnt == 0)
return(DFX_K_HW_TIMEOUT);
return(DFX_K_SUCCESS);
}
/*
* Align an sk_buff to a boundary power of 2
*
*/
static void my_skb_align(struct sk_buff *skb, int n)
{
unsigned long x = (unsigned long)skb->data;
unsigned long v;
v = ALIGN(x, n); /* Where we want to be */
skb_reserve(skb, v - x);
}
/*
* ================
* = dfx_rcv_init =
* ================
*
* Overview:
* Produces buffers to adapter LLC Host receive descriptor block
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
* get_buffers - non-zero if buffers to be allocated
*
* Functional Description:
* This routine can be called during dfx_adap_init() or during an adapter
* reset. It initializes the descriptor block and produces all allocated
* LLC Host queue receive buffers.
*
* Return Codes:
* Return 0 on success or -ENOMEM if buffer allocation failed (when using
* dynamic buffer allocation). If the buffer allocation failed, the
* already allocated buffers will not be released and the caller should do
* this.
*
* Assumptions:
* The PDQ has been reset and the adapter and driver maintained Type 2
* register indices are cleared.
*
* Side Effects:
* Receive buffers are posted to the adapter LLC queue and the adapter
* is notified.
*/
static int dfx_rcv_init(DFX_board_t *bp, int get_buffers)
{
int i, j; /* used in for loop */
/*
* Since each receive buffer is a single fragment of same length, initialize
* first longword in each receive descriptor for entire LLC Host descriptor
* block. Also initialize second longword in each receive descriptor with
* physical address of receive buffer. We'll always allocate receive
* buffers in powers of 2 so that we can easily fill the 256 entry descriptor
* block and produce new receive buffers by simply updating the receive
* producer index.
*
* Assumptions:
* To support all shipping versions of PDQ, the receive buffer size
* must be mod 128 in length and the physical address must be 128 byte
* aligned. In other words, bits 0-6 of the length and address must
* be zero for the following descriptor field entries to be correct on
* all PDQ-based boards. We guaranteed both requirements during
* driver initialization when we allocated memory for the receive buffers.
*/
if (get_buffers) {
#ifdef DYNAMIC_BUFFERS
for (i = 0; i < (int)(bp->rcv_bufs_to_post); i++)
for (j = 0; (i + j) < (int)PI_RCV_DATA_K_NUM_ENTRIES; j += bp->rcv_bufs_to_post)
{
struct sk_buff *newskb = __dev_alloc_skb(NEW_SKB_SIZE, GFP_NOIO);
if (!newskb)
return -ENOMEM;
bp->descr_block_virt->rcv_data[i+j].long_0 = (u32) (PI_RCV_DESCR_M_SOP |
((PI_RCV_DATA_K_SIZE_MAX / PI_ALIGN_K_RCV_DATA_BUFF) << PI_RCV_DESCR_V_SEG_LEN));
/*
* align to 128 bytes for compatibility with
* the old EISA boards.
*/
my_skb_align(newskb, 128);
bp->descr_block_virt->rcv_data[i + j].long_1 =
(u32)pci_map_single(bp->pci_dev, newskb->data,
NEW_SKB_SIZE,
PCI_DMA_FROMDEVICE);
/*
* p_rcv_buff_va is only used inside the
* kernel so we put the skb pointer here.
*/
bp->p_rcv_buff_va[i+j] = (char *) newskb;
}
#else
for (i=0; i < (int)(bp->rcv_bufs_to_post); i++)
for (j=0; (i + j) < (int)PI_RCV_DATA_K_NUM_ENTRIES; j += bp->rcv_bufs_to_post)
{
bp->descr_block_virt->rcv_data[i+j].long_0 = (u32) (PI_RCV_DESCR_M_SOP |
((PI_RCV_DATA_K_SIZE_MAX / PI_ALIGN_K_RCV_DATA_BUFF) << PI_RCV_DESCR_V_SEG_LEN));
bp->descr_block_virt->rcv_data[i+j].long_1 = (u32) (bp->rcv_block_phys + (i * PI_RCV_DATA_K_SIZE_MAX));
bp->p_rcv_buff_va[i+j] = (char *) (bp->rcv_block_virt + (i * PI_RCV_DATA_K_SIZE_MAX));
}
#endif
}
/* Update receive producer and Type 2 register */
bp->rcv_xmt_reg.index.rcv_prod = bp->rcv_bufs_to_post;
dfx_port_write_long(bp, PI_PDQ_K_REG_TYPE_2_PROD, bp->rcv_xmt_reg.lword);
return 0;
}
/*
* =========================
* = dfx_rcv_queue_process =
* =========================
*
* Overview:
* Process received LLC frames.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Received LLC frames are processed until there are no more consumed frames.
* Once all frames are processed, the receive buffers are returned to the
* adapter. Note that this algorithm fixes the length of time that can be spent
* in this routine, because there are a fixed number of receive buffers to
* process and buffers are not produced until this routine exits and returns
* to the ISR.
*
* Return Codes:
* None
*
* Assumptions:
* None
*
* Side Effects:
* None
*/
static void dfx_rcv_queue_process(
DFX_board_t *bp
)
{
PI_TYPE_2_CONSUMER *p_type_2_cons; /* ptr to rcv/xmt consumer block register */
char *p_buff; /* ptr to start of packet receive buffer (FMC descriptor) */
u32 descr, pkt_len; /* FMC descriptor field and packet length */
struct sk_buff *skb; /* pointer to a sk_buff to hold incoming packet data */
/* Service all consumed LLC receive frames */
p_type_2_cons = (PI_TYPE_2_CONSUMER *)(&bp->cons_block_virt->xmt_rcv_data);
while (bp->rcv_xmt_reg.index.rcv_comp != p_type_2_cons->index.rcv_cons)
{
/* Process any errors */
int entry;
entry = bp->rcv_xmt_reg.index.rcv_comp;
#ifdef DYNAMIC_BUFFERS
p_buff = (char *) (((struct sk_buff *)bp->p_rcv_buff_va[entry])->data);
#else
p_buff = (char *) bp->p_rcv_buff_va[entry];
#endif
memcpy(&descr, p_buff + RCV_BUFF_K_DESCR, sizeof(u32));
if (descr & PI_FMC_DESCR_M_RCC_FLUSH)
{
if (descr & PI_FMC_DESCR_M_RCC_CRC)
bp->rcv_crc_errors++;
else
bp->rcv_frame_status_errors++;
}
else
{
int rx_in_place = 0;
/* The frame was received without errors - verify packet length */
pkt_len = (u32)((descr & PI_FMC_DESCR_M_LEN) >> PI_FMC_DESCR_V_LEN);
pkt_len -= 4; /* subtract 4 byte CRC */
if (!IN_RANGE(pkt_len, FDDI_K_LLC_ZLEN, FDDI_K_LLC_LEN))
bp->rcv_length_errors++;
else{
#ifdef DYNAMIC_BUFFERS
if (pkt_len > SKBUFF_RX_COPYBREAK) {
struct sk_buff *newskb;
newskb = dev_alloc_skb(NEW_SKB_SIZE);
if (newskb){
rx_in_place = 1;
my_skb_align(newskb, 128);
skb = (struct sk_buff *)bp->p_rcv_buff_va[entry];
pci_unmap_single(bp->pci_dev,
bp->descr_block_virt->rcv_data[entry].long_1,
NEW_SKB_SIZE,
PCI_DMA_FROMDEVICE);
skb_reserve(skb, RCV_BUFF_K_PADDING);
bp->p_rcv_buff_va[entry] = (char *)newskb;
bp->descr_block_virt->rcv_data[entry].long_1 =
(u32)pci_map_single(bp->pci_dev,
newskb->data,
NEW_SKB_SIZE,
PCI_DMA_FROMDEVICE);
} else
skb = NULL;
} else
#endif
skb = dev_alloc_skb(pkt_len+3); /* alloc new buffer to pass up, add room for PRH */
if (skb == NULL)
{
printk("%s: Could not allocate receive buffer. Dropping packet.\n", bp->dev->name);
bp->rcv_discards++;
break;
}
else {
#ifndef DYNAMIC_BUFFERS
if (! rx_in_place)
#endif
{
/* Receive buffer allocated, pass receive packet up */
memcpy(skb->data, p_buff + RCV_BUFF_K_PADDING, pkt_len+3);
}
skb_reserve(skb,3); /* adjust data field so that it points to FC byte */
skb_put(skb, pkt_len); /* pass up packet length, NOT including CRC */
skb->dev = bp->dev; /* pass up device pointer */
skb->protocol = fddi_type_trans(skb, bp->dev);
bp->rcv_total_bytes += skb->len;
netif_rx(skb);
/* Update the rcv counters */
bp->dev->last_rx = jiffies;
bp->rcv_total_frames++;
if (*(p_buff + RCV_BUFF_K_DA) & 0x01)
bp->rcv_multicast_frames++;
}
}
}
/*
* Advance the producer (for recycling) and advance the completion
* (for servicing received frames). Note that it is okay to
* advance the producer without checking that it passes the
* completion index because they are both advanced at the same
* rate.
*/
bp->rcv_xmt_reg.index.rcv_prod += 1;
bp->rcv_xmt_reg.index.rcv_comp += 1;
}
}
/*
* =====================
* = dfx_xmt_queue_pkt =
* =====================
*
* Overview:
* Queues packets for transmission
*
* Returns:
* Condition code
*
* Arguments:
* skb - pointer to sk_buff to queue for transmission
* dev - pointer to device information
*
* Functional Description:
* Here we assume that an incoming skb transmit request
* is contained in a single physically contiguous buffer
* in which the virtual address of the start of packet
* (skb->data) can be converted to a physical address
* by using pci_map_single().
*
* Since the adapter architecture requires a three byte
* packet request header to prepend the start of packet,
* we'll write the three byte field immediately prior to
* the FC byte. This assumption is valid because we've
* ensured that dev->hard_header_len includes three pad
* bytes. By posting a single fragment to the adapter,
* we'll reduce the number of descriptor fetches and
* bus traffic needed to send the request.
*
* Also, we can't free the skb until after it's been DMA'd
* out by the adapter, so we'll queue it in the driver and
* return it in dfx_xmt_done.
*
* Return Codes:
* 0 - driver queued packet, link is unavailable, or skbuff was bad
* 1 - caller should requeue the sk_buff for later transmission
*
* Assumptions:
* First and foremost, we assume the incoming skb pointer
* is NOT NULL and is pointing to a valid sk_buff structure.
*
* The outgoing packet is complete, starting with the
* frame control byte including the last byte of data,
* but NOT including the 4 byte CRC. We'll let the
* adapter hardware generate and append the CRC.
*
* The entire packet is stored in one physically
* contiguous buffer which is not cached and whose
* 32-bit physical address can be determined.
*
* It's vital that this routine is NOT reentered for the
* same board and that the OS is not in another section of
* code (eg. dfx_int_common) for the same board on a
* different thread.
*
* Side Effects:
* None
*/
static int dfx_xmt_queue_pkt(
struct sk_buff *skb,
struct net_device *dev
)
{
DFX_board_t *bp = dev->priv;
u8 prod; /* local transmit producer index */
PI_XMT_DESCR *p_xmt_descr; /* ptr to transmit descriptor block entry */
XMT_DRIVER_DESCR *p_xmt_drv_descr; /* ptr to transmit driver descriptor */
unsigned long flags;
netif_stop_queue(dev);
/*
* Verify that incoming transmit request is OK
*
* Note: The packet size check is consistent with other
* Linux device drivers, although the correct packet
* size should be verified before calling the
* transmit routine.
*/
if (!IN_RANGE(skb->len, FDDI_K_LLC_ZLEN, FDDI_K_LLC_LEN))
{
printk("%s: Invalid packet length - %u bytes\n",
dev->name, skb->len);
bp->xmt_length_errors++; /* bump error counter */
netif_wake_queue(dev);
dev_kfree_skb(skb);
return(0); /* return "success" */
}
/*
* See if adapter link is available, if not, free buffer
*
* Note: If the link isn't available, free buffer and return 0
* rather than tell the upper layer to requeue the packet.
* The methodology here is that by the time the link
* becomes available, the packet to be sent will be
* fairly stale. By simply dropping the packet, the
* higher layer protocols will eventually time out
* waiting for response packets which it won't receive.
*/
if (bp->link_available == PI_K_FALSE)
{
if (dfx_hw_adap_state_rd(bp) == PI_STATE_K_LINK_AVAIL) /* is link really available? */
bp->link_available = PI_K_TRUE; /* if so, set flag and continue */
else
{
bp->xmt_discards++; /* bump error counter */
dev_kfree_skb(skb); /* free sk_buff now */
netif_wake_queue(dev);
return(0); /* return "success" */
}
}
spin_lock_irqsave(&bp->lock, flags);
/* Get the current producer and the next free xmt data descriptor */
prod = bp->rcv_xmt_reg.index.xmt_prod;
p_xmt_descr = &(bp->descr_block_virt->xmt_data[prod]);
/*
* Get pointer to auxiliary queue entry to contain information
* for this packet.
*
* Note: The current xmt producer index will become the
* current xmt completion index when we complete this
* packet later on. So, we'll get the pointer to the
* next auxiliary queue entry now before we bump the
* producer index.
*/
p_xmt_drv_descr = &(bp->xmt_drv_descr_blk[prod++]); /* also bump producer index */
/* Write the three PRH bytes immediately before the FC byte */
skb_push(skb,3);
skb->data[0] = DFX_PRH0_BYTE; /* these byte values are defined */
skb->data[1] = DFX_PRH1_BYTE; /* in the Motorola FDDI MAC chip */
skb->data[2] = DFX_PRH2_BYTE; /* specification */
/*
* Write the descriptor with buffer info and bump producer
*
* Note: Since we need to start DMA from the packet request
* header, we'll add 3 bytes to the DMA buffer length,
* and we'll determine the physical address of the
* buffer from the PRH, not skb->data.
*
* Assumptions:
* 1. Packet starts with the frame control (FC) byte
* at skb->data.
* 2. The 4-byte CRC is not appended to the buffer or
* included in the length.
* 3. Packet length (skb->len) is from FC to end of
* data, inclusive.
* 4. The packet length does not exceed the maximum
* FDDI LLC frame length of 4491 bytes.
* 5. The entire packet is contained in a physically
* contiguous, non-cached, locked memory space
* comprised of a single buffer pointed to by
* skb->data.
* 6. The physical address of the start of packet
* can be determined from the virtual address
* by using pci_map_single() and is only 32-bits
* wide.
*/
p_xmt_descr->long_0 = (u32) (PI_XMT_DESCR_M_SOP | PI_XMT_DESCR_M_EOP | ((skb->len) << PI_XMT_DESCR_V_SEG_LEN));
p_xmt_descr->long_1 = (u32)pci_map_single(bp->pci_dev, skb->data,
skb->len, PCI_DMA_TODEVICE);
/*
* Verify that descriptor is actually available
*
* Note: If descriptor isn't available, return 1 which tells
* the upper layer to requeue the packet for later
* transmission.
*
* We need to ensure that the producer never reaches the
* completion, except to indicate that the queue is empty.
*/
if (prod == bp->rcv_xmt_reg.index.xmt_comp)
{
skb_pull(skb,3);
spin_unlock_irqrestore(&bp->lock, flags);
return(1); /* requeue packet for later */
}
/*
* Save info for this packet for xmt done indication routine
*
* Normally, we'd save the producer index in the p_xmt_drv_descr
* structure so that we'd have it handy when we complete this
* packet later (in dfx_xmt_done). However, since the current
* transmit architecture guarantees a single fragment for the
* entire packet, we can simply bump the completion index by
* one (1) for each completed packet.
*
* Note: If this assumption changes and we're presented with
* an inconsistent number of transmit fragments for packet
* data, we'll need to modify this code to save the current
* transmit producer index.
*/
p_xmt_drv_descr->p_skb = skb;
/* Update Type 2 register */
bp->rcv_xmt_reg.index.xmt_prod = prod;
dfx_port_write_long(bp, PI_PDQ_K_REG_TYPE_2_PROD, bp->rcv_xmt_reg.lword);
spin_unlock_irqrestore(&bp->lock, flags);
netif_wake_queue(dev);
return(0); /* packet queued to adapter */
}
/*
* ================
* = dfx_xmt_done =
* ================
*
* Overview:
* Processes all frames that have been transmitted.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* For all consumed transmit descriptors that have not
* yet been completed, we'll free the skb we were holding
* onto using dev_kfree_skb and bump the appropriate
* counters.
*
* Return Codes:
* None
*
* Assumptions:
* The Type 2 register is not updated in this routine. It is
* assumed that it will be updated in the ISR when dfx_xmt_done
* returns.
*
* Side Effects:
* None
*/
static int dfx_xmt_done(DFX_board_t *bp)
{
XMT_DRIVER_DESCR *p_xmt_drv_descr; /* ptr to transmit driver descriptor */
PI_TYPE_2_CONSUMER *p_type_2_cons; /* ptr to rcv/xmt consumer block register */
u8 comp; /* local transmit completion index */
int freed = 0; /* buffers freed */
/* Service all consumed transmit frames */
p_type_2_cons = (PI_TYPE_2_CONSUMER *)(&bp->cons_block_virt->xmt_rcv_data);
while (bp->rcv_xmt_reg.index.xmt_comp != p_type_2_cons->index.xmt_cons)
{
/* Get pointer to the transmit driver descriptor block information */
p_xmt_drv_descr = &(bp->xmt_drv_descr_blk[bp->rcv_xmt_reg.index.xmt_comp]);
/* Increment transmit counters */
bp->xmt_total_frames++;
bp->xmt_total_bytes += p_xmt_drv_descr->p_skb->len;
/* Return skb to operating system */
comp = bp->rcv_xmt_reg.index.xmt_comp;
pci_unmap_single(bp->pci_dev,
bp->descr_block_virt->xmt_data[comp].long_1,
p_xmt_drv_descr->p_skb->len,
PCI_DMA_TODEVICE);
dev_kfree_skb_irq(p_xmt_drv_descr->p_skb);
/*
* Move to start of next packet by updating completion index
*
* Here we assume that a transmit packet request is always
* serviced by posting one fragment. We can therefore
* simplify the completion code by incrementing the
* completion index by one. This code will need to be
* modified if this assumption changes. See comments
* in dfx_xmt_queue_pkt for more details.
*/
bp->rcv_xmt_reg.index.xmt_comp += 1;
freed++;
}
return freed;
}
/*
* =================
* = dfx_rcv_flush =
* =================
*
* Overview:
* Remove all skb's in the receive ring.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* Free's all the dynamically allocated skb's that are
* currently attached to the device receive ring. This
* function is typically only used when the device is
* initialized or reinitialized.
*
* Return Codes:
* None
*
* Side Effects:
* None
*/
#ifdef DYNAMIC_BUFFERS
static void dfx_rcv_flush( DFX_board_t *bp )
{
int i, j;
for (i = 0; i < (int)(bp->rcv_bufs_to_post); i++)
for (j = 0; (i + j) < (int)PI_RCV_DATA_K_NUM_ENTRIES; j += bp->rcv_bufs_to_post)
{
struct sk_buff *skb;
skb = (struct sk_buff *)bp->p_rcv_buff_va[i+j];
if (skb)
dev_kfree_skb(skb);
bp->p_rcv_buff_va[i+j] = NULL;
}
}
#else
static inline void dfx_rcv_flush( DFX_board_t *bp )
{
}
#endif /* DYNAMIC_BUFFERS */
/*
* =================
* = dfx_xmt_flush =
* =================
*
* Overview:
* Processes all frames whether they've been transmitted
* or not.
*
* Returns:
* None
*
* Arguments:
* bp - pointer to board information
*
* Functional Description:
* For all produced transmit descriptors that have not
* yet been completed, we'll free the skb we were holding
* onto using dev_kfree_skb and bump the appropriate
* counters. Of course, it's possible that some of
* these transmit requests actually did go out, but we
* won't make that distinction here. Finally, we'll
* update the consumer index to match the producer.
*
* Return Codes:
* None
*
* Assumptions:
* This routine does NOT update the Type 2 register. It
* is assumed that this routine is being called during a
* transmit flush interrupt, or a shutdown or close routine.
*
* Side Effects:
* None
*/
static void dfx_xmt_flush( DFX_board_t *bp )
{
u32 prod_cons; /* rcv/xmt consumer block longword */
XMT_DRIVER_DESCR *p_xmt_drv_descr; /* ptr to transmit driver descriptor */
u8 comp; /* local transmit completion index */
/* Flush all outstanding transmit frames */
while (bp->rcv_xmt_reg.index.xmt_comp != bp->rcv_xmt_reg.index.xmt_prod)
{
/* Get pointer to the transmit driver descriptor block information */
p_xmt_drv_descr = &(bp->xmt_drv_descr_blk[bp->rcv_xmt_reg.index.xmt_comp]);
/* Return skb to operating system */
comp = bp->rcv_xmt_reg.index.xmt_comp;
pci_unmap_single(bp->pci_dev,
bp->descr_block_virt->xmt_data[comp].long_1,
p_xmt_drv_descr->p_skb->len,
PCI_DMA_TODEVICE);
dev_kfree_skb(p_xmt_drv_descr->p_skb);
/* Increment transmit error counter */
bp->xmt_discards++;
/*
* Move to start of next packet by updating completion index
*
* Here we assume that a transmit packet request is always
* serviced by posting one fragment. We can therefore
* simplify the completion code by incrementing the
* completion index by one. This code will need to be
* modified if this assumption changes. See comments
* in dfx_xmt_queue_pkt for more details.
*/
bp->rcv_xmt_reg.index.xmt_comp += 1;
}
/* Update the transmit consumer index in the consumer block */
prod_cons = (u32)(bp->cons_block_virt->xmt_rcv_data & ~PI_CONS_M_XMT_INDEX);
prod_cons |= (u32)(bp->rcv_xmt_reg.index.xmt_prod << PI_CONS_V_XMT_INDEX);
bp->cons_block_virt->xmt_rcv_data = prod_cons;
}
static void __devexit dfx_remove_one_pci_or_eisa(struct pci_dev *pdev, struct net_device *dev)
{
DFX_board_t *bp = dev->priv;
int alloc_size; /* total buffer size used */
unregister_netdev(dev);
release_region(dev->base_addr, pdev ? PFI_K_CSR_IO_LEN : PI_ESIC_K_CSR_IO_LEN );
alloc_size = sizeof(PI_DESCR_BLOCK) +
PI_CMD_REQ_K_SIZE_MAX + PI_CMD_RSP_K_SIZE_MAX +
#ifndef DYNAMIC_BUFFERS
(bp->rcv_bufs_to_post * PI_RCV_DATA_K_SIZE_MAX) +
#endif
sizeof(PI_CONSUMER_BLOCK) +
(PI_ALIGN_K_DESC_BLK - 1);
if (bp->kmalloced)
pci_free_consistent(pdev, alloc_size, bp->kmalloced,
bp->kmalloced_dma);
free_netdev(dev);
}
static void __devexit dfx_remove_one (struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
dfx_remove_one_pci_or_eisa(pdev, dev);
pci_set_drvdata(pdev, NULL);
}
static struct pci_device_id dfx_pci_tbl[] = {
{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_FDDI, PCI_ANY_ID, PCI_ANY_ID, },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, dfx_pci_tbl);
static struct pci_driver dfx_driver = {
.name = "defxx",
.probe = dfx_init_one,
.remove = __devexit_p(dfx_remove_one),
.id_table = dfx_pci_tbl,
};
static int dfx_have_pci;
static int dfx_have_eisa;
static void __exit dfx_eisa_cleanup(void)
{
struct net_device *dev = root_dfx_eisa_dev;
while (dev)
{
struct net_device *tmp;
DFX_board_t *bp;
bp = (DFX_board_t*)dev->priv;
tmp = bp->next;
dfx_remove_one_pci_or_eisa(NULL, dev);
dev = tmp;
}
}
static int __init dfx_init(void)
{
int rc_pci, rc_eisa;
rc_pci = pci_module_init(&dfx_driver);
if (rc_pci >= 0) dfx_have_pci = 1;
rc_eisa = dfx_eisa_init();
if (rc_eisa >= 0) dfx_have_eisa = 1;
return ((rc_eisa < 0) ? 0 : rc_eisa) + ((rc_pci < 0) ? 0 : rc_pci);
}
static void __exit dfx_cleanup(void)
{
if (dfx_have_pci)
pci_unregister_driver(&dfx_driver);
if (dfx_have_eisa)
dfx_eisa_cleanup();
}
module_init(dfx_init);
module_exit(dfx_cleanup);
MODULE_AUTHOR("Lawrence V. Stefani");
MODULE_DESCRIPTION("DEC FDDIcontroller EISA/PCI (DEFEA/DEFPA) driver "
DRV_VERSION " " DRV_RELDATE);
MODULE_LICENSE("GPL");
/*
* Local variables:
* kernel-compile-command: "gcc -D__KERNEL__ -I/root/linux/include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -c defxx.c"
* End:
*/
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