- 根目录:
- drivers
- staging
- wlags49_h2
- wl_pci.c
/*******************************************************************************
* Agere Systems Inc.
* Wireless device driver for Linux (wlags49).
*
* Copyright (c) 1998-2003 Agere Systems Inc.
* All rights reserved.
* http://www.agere.com
*
* Initially developed by TriplePoint, Inc.
* http://www.triplepoint.com
*
*------------------------------------------------------------------------------
*
* This file contains processing and initialization specific to PCI/miniPCI
* devices.
*
*------------------------------------------------------------------------------
*
* SOFTWARE LICENSE
*
* This software is provided subject to the following terms and conditions,
* which you should read carefully before using the software. Using this
* software indicates your acceptance of these terms and conditions. If you do
* not agree with these terms and conditions, do not use the software.
*
* Copyright © 2003 Agere Systems Inc.
* All rights reserved.
*
* Redistribution and use in source or binary forms, with or without
* modifications, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following Disclaimer as comments in the code as
* well as in the documentation and/or other materials provided with the
* distribution.
*
* . Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following Disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* . Neither the name of Agere Systems Inc. nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Disclaimer
*
* THIS SOFTWARE IS PROVIDED AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
* USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
* RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
******************************************************************************/
/*******************************************************************************
* include files
******************************************************************************/
#include <wireless/wl_version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/ctype.h>
#include <linux/string.h>
//#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bitops.h>
#include <asm/uaccess.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <hcf/debug.h>
#include <hcf.h>
#include <dhf.h>
#include <hcfdef.h>
#include <wireless/wl_if.h>
#include <wireless/wl_internal.h>
#include <wireless/wl_util.h>
#include <wireless/wl_main.h>
#include <wireless/wl_netdev.h>
#include <wireless/wl_pci.h>
/*******************************************************************************
* global variables
******************************************************************************/
#if DBG
extern dbg_info_t *DbgInfo;
#endif // DBG
/* define the PCI device Table Cardname and id tables */
static struct pci_device_id wl_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_0), },
{ PCI_DEVICE(PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_1), },
{ PCI_DEVICE(PCI_VENDOR_ID_WL_LKM, PCI_DEVICE_ID_WL_LKM_2), },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, wl_pci_tbl);
/*******************************************************************************
* function prototypes
******************************************************************************/
int wl_pci_probe( struct pci_dev *pdev,
const struct pci_device_id *ent );
void wl_pci_remove(struct pci_dev *pdev);
int wl_pci_setup( struct pci_dev *pdev );
void wl_pci_enable_cardbus_interrupts( struct pci_dev *pdev );
#ifdef ENABLE_DMA
int wl_pci_dma_alloc( struct pci_dev *pdev, struct wl_private *lp );
int wl_pci_dma_free( struct pci_dev *pdev, struct wl_private *lp );
int wl_pci_dma_alloc_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_free_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_alloc_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_free_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_alloc_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc, int size );
int wl_pci_dma_free_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_alloc_desc( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_free_desc( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc );
int wl_pci_dma_alloc_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT *desc, int size );
int wl_pci_dma_free_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT *desc );
void wl_pci_dma_hcf_reclaim_rx( struct wl_private *lp );
#endif // ENABLE_DMA
/*******************************************************************************
* PCI module function registration
******************************************************************************/
static struct pci_driver wl_driver = {
.name = MODULE_NAME,
.id_table = wl_pci_tbl,
.probe = wl_pci_probe,
.remove = wl_pci_remove,
.suspend = NULL,
.resume = NULL
};
/*******************************************************************************
* wl_adapter_init_module()
*******************************************************************************
*
* DESCRIPTION:
*
* Called by init_module() to perform PCI-specific driver initialization.
*
* PARAMETERS:
*
* N/A
*
* RETURNS:
*
* 0
*
******************************************************************************/
int wl_adapter_init_module( void )
{
int result;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_adapter_init_module()" );
DBG_ENTER( DbgInfo );
DBG_TRACE( DbgInfo, "wl_adapter_init_module() -- PCI\n" );
result = pci_register_driver( &wl_driver ); //;?replace with pci_module_init, Rubini pg 490
//;? why not do something with the result
DBG_LEAVE( DbgInfo );
return 0;
} // wl_adapter_init_module
/*============================================================================*/
/*******************************************************************************
* wl_adapter_cleanup_module()
*******************************************************************************
*
* DESCRIPTION:
*
* Called by cleanup_module() to perform PCI-specific driver cleanup.
*
* PARAMETERS:
*
* N/A
*
* RETURNS:
*
* N/A
*
******************************************************************************/
void wl_adapter_cleanup_module( void )
{
//;?how come wl_adapter_cleanup_module is located in a seemingly pci specific module
DBG_FUNC( "wl_adapter_cleanup_module" );
DBG_ENTER( DbgInfo );
//;?DBG_TRACE below feels like nearly redundant in the light of DBG_ENTER above
DBG_TRACE( DbgInfo, "wl_adapter_cleanup_module() -- PCI\n" );
pci_unregister_driver( &wl_driver );
DBG_LEAVE( DbgInfo );
return;
} // wl_adapter_cleanup_module
/*============================================================================*/
/*******************************************************************************
* wl_adapter_insert()
*******************************************************************************
*
* DESCRIPTION:
*
* Called by wl_pci_probe() to continue the process of device insertion.
*
* PARAMETERS:
*
* dev - a pointer to the device's net_device structure
*
* RETURNS:
*
* TRUE or FALSE
*
******************************************************************************/
int wl_adapter_insert( struct net_device *dev )
{
int result = FALSE;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_adapter_insert" );
DBG_ENTER( DbgInfo );
DBG_TRACE( DbgInfo, "wl_adapter_insert() -- PCI\n" );
if( dev == NULL ) {
DBG_ERROR( DbgInfo, "net_device pointer is NULL!!!\n" );
} else if( dev->priv == NULL ) {
DBG_ERROR( DbgInfo, "wl_private pointer is NULL!!!\n" );
} else if( wl_insert( dev ) ) { /* Perform remaining device initialization */
result = TRUE;
} else {
DBG_TRACE( DbgInfo, "wl_insert() FAILED\n" );
}
DBG_LEAVE( DbgInfo );
return result;
} // wl_adapter_insert
/*============================================================================*/
/*******************************************************************************
* wl_adapter_open()
*******************************************************************************
*
* DESCRIPTION:
*
* Open the device.
*
* PARAMETERS:
*
* dev - a pointer to the device's net_device structure
*
* RETURNS:
*
* an HCF status code
*
******************************************************************************/
int wl_adapter_open( struct net_device *dev )
{
int result = 0;
int hcf_status = HCF_SUCCESS;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_adapter_open" );
DBG_ENTER( DbgInfo );
DBG_TRACE( DbgInfo, "wl_adapter_open() -- PCI\n" );
hcf_status = wl_open( dev );
if( hcf_status != HCF_SUCCESS ) {
result = -ENODEV;
}
DBG_LEAVE( DbgInfo );
return result;
} // wl_adapter_open
/*============================================================================*/
/*******************************************************************************
* wl_adapter_close()
*******************************************************************************
*
* DESCRIPTION:
*
* Close the device
*
* PARAMETERS:
*
* dev - a pointer to the device's net_device structure
*
* RETURNS:
*
* 0
*
******************************************************************************/
int wl_adapter_close( struct net_device *dev )
{
DBG_FUNC( "wl_adapter_close" );
DBG_ENTER( DbgInfo );
DBG_TRACE( DbgInfo, "wl_adapter_close() -- PCI\n" );
DBG_TRACE( DbgInfo, "%s: Shutting down adapter.\n", dev->name );
wl_close( dev );
DBG_LEAVE( DbgInfo );
return 0;
} // wl_adapter_close
/*============================================================================*/
/*******************************************************************************
* wl_adapter_is_open()
*******************************************************************************
*
* DESCRIPTION:
*
* Check whether this device is open. Returns
*
* PARAMETERS:
*
* dev - a pointer to the device's net_device structure
*
* RETURNS:
*
* nonzero if device is open.
*
******************************************************************************/
int wl_adapter_is_open( struct net_device *dev )
{
/* This function is used in PCMCIA to check the status of the 'open' field
in the dev_link_t structure associated with a network device. There
doesn't seem to be an analog to this for PCI, and checking the status
contained in the net_device structure doesn't have the same effect.
For now, return TRUE, but find out if this is necessary for PCI. */
return TRUE;
} // wl_adapter_is_open
/*============================================================================*/
/*******************************************************************************
* wl_pci_probe()
*******************************************************************************
*
* DESCRIPTION:
*
* Registered in the pci_driver structure, this function is called when the
* PCI subsystem finds a new PCI device which matches the information contained
* in the pci_device_id table.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* ent - this device's entry in the pci_device_id table
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_probe( struct pci_dev *pdev,
const struct pci_device_id *ent )
{
int result;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_probe" );
DBG_ENTER( DbgInfo );
DBG_PRINT( "%s\n", VERSION_INFO );
result = wl_pci_setup( pdev );
DBG_LEAVE( DbgInfo );
return result;
} // wl_pci_probe
/*============================================================================*/
/*******************************************************************************
* wl_pci_remove()
*******************************************************************************
*
* DESCRIPTION:
*
* Registered in the pci_driver structure, this function is called when the
* PCI subsystem detects that a PCI device which matches the information
* contained in the pci_device_id table has been removed.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
*
* RETURNS:
*
* N/A
*
******************************************************************************/
void wl_pci_remove(struct pci_dev *pdev)
{
struct net_device *dev = NULL;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_remove" );
DBG_ENTER( DbgInfo );
/* Make sure the pci_dev pointer passed in is valid */
if( pdev == NULL ) {
DBG_ERROR( DbgInfo, "PCI subsys passed in an invalid pci_dev pointer\n" );
return;
}
dev = pci_get_drvdata( pdev );
if( dev == NULL ) {
DBG_ERROR( DbgInfo, "Could not retrieve net_device structure\n" );
return;
}
/* Perform device cleanup */
wl_remove( dev );
free_irq( dev->irq, dev );
#ifdef ENABLE_DMA
wl_pci_dma_free( pdev, dev->priv );
#endif
wl_device_dealloc( dev );
DBG_LEAVE( DbgInfo );
return;
} // wl_pci_remove
/*============================================================================*/
/*******************************************************************************
* wl_pci_setup()
*******************************************************************************
*
* DESCRIPTION:
*
* Called by wl_pci_probe() to begin a device's initialization process.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_setup( struct pci_dev *pdev )
{
int result = 0;
struct net_device *dev = NULL;
struct wl_private *lp = NULL;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_setup" );
DBG_ENTER( DbgInfo );
/* Make sure the pci_dev pointer passed in is valid */
if( pdev == NULL ) {
DBG_ERROR( DbgInfo, "PCI subsys passed in an invalid pci_dev pointer\n" );
return -ENODEV;
}
result = pci_enable_device( pdev );
if( result != 0 ) {
DBG_ERROR( DbgInfo, "pci_enable_device() failed\n" );
DBG_LEAVE( DbgInfo );
return result;
}
/* We found our device! Let's register it with the system */
DBG_TRACE( DbgInfo, "Found our device, now registering\n" );
dev = wl_device_alloc( );
if( dev == NULL ) {
DBG_ERROR( DbgInfo, "Could not register device!!!\n" );
DBG_LEAVE( DbgInfo );
return -ENOMEM;
}
/* Make sure that space was allocated for our private adapter struct */
if( dev->priv == NULL ) {
DBG_ERROR( DbgInfo, "Private adapter struct was not allocated!!!\n" );
wl_device_dealloc(dev);
DBG_LEAVE( DbgInfo );
return -ENOMEM;
}
#ifdef ENABLE_DMA
/* Allocate DMA Descriptors */
if( wl_pci_dma_alloc( pdev, dev->priv ) < 0 ) {
DBG_ERROR( DbgInfo, "Could not allocate DMA descriptor memory!!!\n" );
wl_device_dealloc(dev);
DBG_LEAVE( DbgInfo );
return -ENOMEM;
}
#endif
/* Register our private adapter structure with PCI */
pci_set_drvdata( pdev, dev );
/* Fill out bus specific information in the net_device struct */
dev->irq = pdev->irq;
SET_MODULE_OWNER( dev );
DBG_TRACE( DbgInfo, "Device Base Address: %#03lx\n", pdev->resource[0].start );
dev->base_addr = pdev->resource[0].start;
/* Initialize our device here */
if( !wl_adapter_insert( dev )) {
DBG_ERROR( DbgInfo, "wl_adapter_insert() FAILED!!!\n" );
wl_device_dealloc( dev );
DBG_LEAVE( DbgInfo );
return -EINVAL;
}
/* Register our ISR */
DBG_TRACE( DbgInfo, "Registering ISR...\n" );
result = request_irq(dev->irq, wl_isr, SA_SHIRQ, dev->name, dev);
if( result ) {
DBG_WARNING( DbgInfo, "Could not register ISR!!!\n" );
wl_remove(dev);
wl_device_dealloc(dev);
DBG_LEAVE( DbgInfo );
return result;
}
/* Make sure interrupts are enabled properly for CardBus */
lp = dev->priv;
if( lp->hcfCtx.IFB_BusType == CFG_NIC_BUS_TYPE_CARDBUS ||
lp->hcfCtx.IFB_BusType == CFG_NIC_BUS_TYPE_PCI ) {
DBG_TRACE( DbgInfo, "This is a PCI/CardBus card, enable interrupts\n" );
wl_pci_enable_cardbus_interrupts( pdev );
}
/* Enable bus mastering */
pci_set_master( pdev );
DBG_LEAVE( DbgInfo );
return 0;
} // wl_pci_setup
/*============================================================================*/
/*******************************************************************************
* wl_pci_enable_cardbus_interrupts()
*******************************************************************************
*
* DESCRIPTION:
*
* Called by wl_pci_setup() to enable interrupts on a CardBus device. This
* is done by writing bit 15 to the function event mask register. This
* CardBus-specific register is located in BAR2 (counting from BAR0), in memory
* space at byte offset 1f4 (7f4 for WARP).
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
*
* RETURNS:
*
* N/A
*
******************************************************************************/
void wl_pci_enable_cardbus_interrupts( struct pci_dev *pdev )
{
u32 bar2_reg;
u32 mem_addr_bus;
u32 func_evt_mask_reg;
void *mem_addr_kern = NULL;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_enable_cardbus_interrupts" );
DBG_ENTER( DbgInfo );
/* Initialize to known bad values */
bar2_reg = 0xdeadbeef;
mem_addr_bus = 0xdeadbeef;
/* Read the BAR2 register; this register contains the base address of the
memory region where the function event mask register lives */
pci_read_config_dword( pdev, PCI_BASE_ADDRESS_2, &bar2_reg );
mem_addr_bus = bar2_reg & PCI_BASE_ADDRESS_MEM_MASK;
/* Once the base address is obtained, remap the memory region to kernel
space so we can retrieve the register */
mem_addr_kern = ioremap( mem_addr_bus, 0x200 );
#ifdef HERMES25
#define REG_OFFSET 0x07F4
#else
#define REG_OFFSET 0x01F4
#endif // HERMES25
#define BIT15 0x8000
/* Retrieve the functional event mask register, enable interrupts by
setting Bit 15, and write back the value */
func_evt_mask_reg = *(u32 *)( mem_addr_kern + REG_OFFSET );
func_evt_mask_reg |= BIT15;
*(u32 *)( mem_addr_kern + REG_OFFSET ) = func_evt_mask_reg;
/* Once complete, unmap the region and exit */
iounmap( mem_addr_kern );
DBG_LEAVE( DbgInfo );
return;
} // wl_pci_enable_cardbus_interrupts
/*============================================================================*/
#ifdef ENABLE_DMA
/*******************************************************************************
* wl_pci_dma_alloc()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates all resources needed for PCI/CardBus DMA operation
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc( struct pci_dev *pdev, struct wl_private *lp )
{
int i;
int status = 0;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_alloc" );
DBG_ENTER( DbgInfo );
// lp->dma.tx_rsc_ind = lp->dma.rx_rsc_ind = 0;
//
// /* Alloc for the Tx chain and its reclaim descriptor */
// for( i = 0; i < NUM_TX_DESC; i++ ) {
// status = wl_pci_dma_alloc_tx_packet( pdev, lp, &lp->dma.tx_packet[i] );
// if( status == 0 ) {
// DBG_PRINT( "lp->dma.tx_packet[%d] : 0x%p\n", i, lp->dma.tx_packet[i] );
// DBG_PRINT( "lp->dma.tx_packet[%d]->next_desc_addr : 0x%p\n", i, lp->dma.tx_packet[i]->next_desc_addr );
// lp->dma.tx_rsc_ind++;
// } else {
// DBG_ERROR( DbgInfo, "Could not alloc DMA Tx Packet\n" );
// break;
// }
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc( pdev, lp, &lp->dma.tx_reclaim_desc );
// DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
// }
// /* Alloc for the Rx chain and its reclaim descriptor */
// if( status == 0 ) {
// for( i = 0; i < NUM_RX_DESC; i++ ) {
// status = wl_pci_dma_alloc_rx_packet( pdev, lp, &lp->dma.rx_packet[i] );
// if( status == 0 ) {
// DBG_PRINT( "lp->dma.rx_packet[%d] : 0x%p\n", i, lp->dma.rx_packet[i] );
// DBG_PRINT( "lp->dma.rx_packet[%d]->next_desc_addr : 0x%p\n", i, lp->dma.rx_packet[i]->next_desc_addr );
// lp->dma.rx_rsc_ind++;
// } else {
// DBG_ERROR( DbgInfo, "Could not alloc DMA Rx Packet\n" );
// break;
// }
// }
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc( pdev, lp, &lp->dma.rx_reclaim_desc );
// DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
// }
// /* Store status, as host should not call HCF functions if this fails */
// lp->dma.status = status; //;?all useages of dma.status have been commented out
// DBG_LEAVE( DbgInfo );
return status;
} // wl_pci_dma_alloc
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free()
*******************************************************************************
*
* DESCRIPTION:
*
* Deallocated all resources needed for PCI/CardBus DMA operation
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free( struct pci_dev *pdev, struct wl_private *lp )
{
int i;
int status = 0;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_free" );
DBG_ENTER( DbgInfo );
/* Reclaim all Rx packets that were handed over to the HCF */
/* Do I need to do this? Before this free is called, I've already disabled
the port which will call wl_pci_dma_hcf_reclaim */
//if( lp->dma.status == 0 )
//{
// wl_pci_dma_hcf_reclaim( lp );
//}
/* Free everything needed for DMA Rx */
for( i = 0; i < NUM_RX_DESC; i++ ) {
if( lp->dma.rx_packet[i] ) {
status = wl_pci_dma_free_rx_packet( pdev, lp, &lp->dma.rx_packet[i] );
if( status != 0 ) {
DBG_WARNING( DbgInfo, "Problem freeing Rx packet\n" );
}
}
}
lp->dma.rx_rsc_ind = 0;
if( lp->dma.rx_reclaim_desc ) {
status = wl_pci_dma_free_desc( pdev, lp, &lp->dma.rx_reclaim_desc );
if( status != 0 ) {
DBG_WARNING( DbgInfo, "Problem freeing Rx reclaim descriptor\n" );
}
}
/* Free everything needed for DMA Tx */
for( i = 0; i < NUM_TX_DESC; i++ ) {
if( lp->dma.tx_packet[i] ) {
status = wl_pci_dma_free_tx_packet( pdev, lp, &lp->dma.tx_packet[i] );
if( status != 0 ) {
DBG_WARNING( DbgInfo, "Problem freeing Tx packet\n" );
}
}
}
lp->dma.tx_rsc_ind = 0;
if( lp->dma.tx_reclaim_desc ) {
status = wl_pci_dma_free_desc( pdev, lp, &lp->dma.tx_reclaim_desc );
if( status != 0 ) {
DBG_WARNING( DbgInfo, "Problem freeing Tx reclaim descriptor\n" );
}
}
DBG_LEAVE( DbgInfo );
return status;
} // wl_pci_dma_free
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_alloc_tx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates a single Tx packet, consisting of several descriptors and
* buffers. Data to transmit is first copied into the 'payload' buffer
* before being transmitted.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd.
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
// int status = 0;
// /*------------------------------------------------------------------------*/
//
// if( desc == NULL ) {
// status = -EFAULT;
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc_and_buf( pdev, lp, desc,
// HCF_DMA_TX_BUF1_SIZE );
//
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc_and_buf( pdev, lp,
// &( (*desc)->next_desc_addr ),
// HCF_MAX_PACKET_SIZE );
// }
// }
// if( status == 0 ) {
// (*desc)->next_desc_phys_addr = (*desc)->next_desc_addr->desc_phys_addr;
// }
// return status;
} // wl_pci_dma_alloc_tx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free_tx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Frees a single Tx packet, described in the corresponding alloc function.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd.
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free_tx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
int status = 0;
/*------------------------------------------------------------------------*/
if( *desc == NULL ) {
DBG_PRINT( "Null descriptor\n" );
status = -EFAULT;
}
//;?the "limited" NDIS strategy, assuming a frame consists ALWAYS out of 2
//descriptors, make this robust
if( status == 0 && (*desc)->next_desc_addr ) {
status = wl_pci_dma_free_desc_and_buf( pdev, lp, &(*desc)->next_desc_addr );
}
if( status == 0 ) {
status = wl_pci_dma_free_desc_and_buf( pdev, lp, desc );
}
return status;
} // wl_pci_dma_free_tx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_alloc_rx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates a single Rx packet, consisting of two descriptors and one
* contiguous buffer. The buffer starts with the hermes-specific header.
* One descriptor points at the start, the other at offset 0x3a of the
* buffer.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd.
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
int status = 0;
DESC_STRCT *p;
/*------------------------------------------------------------------------*/
// if( desc == NULL ) {
// status = -EFAULT;
// }
// //;?the "limited" NDIS strategy, assuming a frame consists ALWAYS out of 2
// //descriptors, make this robust
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc( pdev, lp, desc );
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_buf( pdev, lp, *desc, HCF_MAX_PACKET_SIZE );
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc( pdev, lp, &p );
// }
// if( status == 0 ) {
// /* Size of 1st descriptor becomes 0x3a bytes */
// SET_BUF_SIZE( *desc, HCF_DMA_RX_BUF1_SIZE );
//
// /* Make 2nd descriptor point at offset 0x3a of the buffer */
// SET_BUF_SIZE( p, ( HCF_MAX_PACKET_SIZE - HCF_DMA_RX_BUF1_SIZE ));
// p->buf_addr = (*desc)->buf_addr + HCF_DMA_RX_BUF1_SIZE;
// p->buf_phys_addr = (*desc)->buf_phys_addr + HCF_DMA_RX_BUF1_SIZE;
// p->next_desc_addr = NULL;
//
// /* Chain 2nd descriptor to 1st descriptor */
// (*desc)->next_desc_addr = p;
// (*desc)->next_desc_phys_addr = p->desc_phys_addr;
// }
return status;
} // wl_pci_dma_alloc_rx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free_rx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Frees a single Rx packet, described in the corresponding alloc function.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd.
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free_rx_packet( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
int status = 0;
DESC_STRCT *p;
/*------------------------------------------------------------------------*/
if( *desc == NULL ) {
status = -EFAULT;
}
if( status == 0 ) {
p = (*desc)->next_desc_addr;
/* Free the 2nd descriptor */
if( p != NULL ) {
p->buf_addr = NULL;
p->buf_phys_addr = 0;
status = wl_pci_dma_free_desc( pdev, lp, &p );
}
}
/* Free the buffer and 1st descriptor */
if( status == 0 ) {
SET_BUF_SIZE( *desc, HCF_MAX_PACKET_SIZE );
status = wl_pci_dma_free_desc_and_buf( pdev, lp, desc );
}
return status;
} // wl_pci_dma_free_rx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_alloc_desc_and_buf()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates a DMA descriptor and buffer, and associates them with one
* another.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc, int size )
{
int status = 0;
/*------------------------------------------------------------------------*/
// if( desc == NULL ) {
// status = -EFAULT;
// }
// if( status == 0 ) {
// status = wl_pci_dma_alloc_desc( pdev, lp, desc );
//
// if( status == 0 ) {
// status = wl_pci_dma_alloc_buf( pdev, lp, *desc, size );
// }
// }
return status;
} // wl_pci_dma_alloc_desc_and_buf
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free_desc_and_buf()
*******************************************************************************
*
* DESCRIPTION:
*
* Frees a DMA descriptor and associated buffer.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
* desc - a pointer which will reference the descriptor to be alloc'd
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free_desc_and_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
int status = 0;
/*------------------------------------------------------------------------*/
if( desc == NULL ) {
status = -EFAULT;
}
if( status == 0 && *desc == NULL ) {
status = -EFAULT;
}
if( status == 0 ) {
status = wl_pci_dma_free_buf( pdev, lp, *desc );
if( status == 0 ) {
status = wl_pci_dma_free_desc( pdev, lp, desc );
}
}
return status;
} // wl_pci_dma_free_desc_and_buf
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_alloc_desc()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates one DMA descriptor in cache coherent memory.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc_desc( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
// int status = 0;
// dma_addr_t pa;
// /*------------------------------------------------------------------------*/
//
// DBG_FUNC( "wl_pci_dma_alloc_desc" );
// DBG_ENTER( DbgInfo );
//
// if( desc == NULL ) {
// status = -EFAULT;
// }
// if( status == 0 ) {
// *desc = pci_alloc_consistent( pdev, sizeof( DESC_STRCT ), &pa );
// }
// if( *desc == NULL ) {
// DBG_ERROR( DbgInfo, "pci_alloc_consistent() failed\n" );
// status = -ENOMEM;
// } else {
// memset( *desc, 0, sizeof( DESC_STRCT ));
// (*desc)->desc_phys_addr = cpu_to_le32( pa );
// }
// DBG_LEAVE( DbgInfo );
// return status;
} // wl_pci_dma_alloc_desc
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free_desc()
*******************************************************************************
*
* DESCRIPTION:
*
* Frees one DMA descriptor in cache coherent memory.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free_desc( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT **desc )
{
int status = 0;
/*------------------------------------------------------------------------*/
if( *desc == NULL ) {
status = -EFAULT;
}
if( status == 0 ) {
pci_free_consistent( pdev, sizeof( DESC_STRCT ), *desc,
(*desc)->desc_phys_addr );
}
*desc = NULL;
return status;
} // wl_pci_dma_free_desc
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_alloc_buf()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates one DMA buffer in cache coherent memory, and associates a DMA
* descriptor with this buffer.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_alloc_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT *desc, int size )
{
int status = 0;
dma_addr_t pa;
/*------------------------------------------------------------------------*/
// DBG_FUNC( "wl_pci_dma_alloc_buf" );
// DBG_ENTER( DbgInfo );
//
// if( desc == NULL ) {
// status = -EFAULT;
// }
// if( status == 0 && desc->buf_addr != NULL ) {
// status = -EFAULT;
// }
// if( status == 0 ) {
// desc->buf_addr = pci_alloc_consistent( pdev, size, &pa );
// }
// if( desc->buf_addr == NULL ) {
// DBG_ERROR( DbgInfo, "pci_alloc_consistent() failed\n" );
// status = -ENOMEM;
// } else {
// desc->buf_phys_addr = cpu_to_le32( pa );
// SET_BUF_SIZE( desc, size );
// }
// DBG_LEAVE( DbgInfo );
return status;
} // wl_pci_dma_alloc_buf
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_free_buf()
*******************************************************************************
*
* DESCRIPTION:
*
* Allocates one DMA buffer in cache coherent memory, and associates a DMA
* descriptor with this buffer.
*
* PARAMETERS:
*
* pdev - a pointer to the device's pci_dev structure
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
int wl_pci_dma_free_buf( struct pci_dev *pdev, struct wl_private *lp,
DESC_STRCT *desc )
{
int status = 0;
/*------------------------------------------------------------------------*/
if( desc == NULL ) {
status = -EFAULT;
}
if( status == 0 && desc->buf_addr == NULL ) {
status = -EFAULT;
}
if( status == 0 ) {
pci_free_consistent( pdev, GET_BUF_SIZE( desc ), desc->buf_addr,
desc->buf_phys_addr );
desc->buf_addr = 0;
desc->buf_phys_addr = 0;
SET_BUF_SIZE( desc, 0 );
}
return status;
} // wl_pci_dma_free_buf
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_hcf_supply()
*******************************************************************************
*
* DESCRIPTION:
*
* Supply HCF with DMA-related resources. These consist of:
* - buffers and descriptors for receive purposes
* - one 'reclaim' descriptor for the transmit path, used to fulfill a
* certain H25 DMA engine requirement
* - one 'reclaim' descriptor for the receive path, used to fulfill a
* certain H25 DMA engine requirement
*
* This function is called at start-of-day or at re-initialization.
*
* PARAMETERS:
*
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
void wl_pci_dma_hcf_supply( struct wl_private *lp )
{
int i;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_hcf_supply" );
DBG_ENTER( DbgInfo );
//if( lp->dma.status == 0 );
//{
/* Hand over the Rx/Tx reclaim descriptors to the HCF */
if( lp->dma.tx_reclaim_desc ) {
DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
hcf_dma_tx_put( &lp->hcfCtx, lp->dma.tx_reclaim_desc, 0 );
lp->dma.tx_reclaim_desc = NULL;
DBG_PRINT( "lp->dma.tx_reclaim_desc: 0x%p\n", lp->dma.tx_reclaim_desc );
}
if( lp->dma.rx_reclaim_desc ) {
DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
hcf_dma_rx_put( &lp->hcfCtx, lp->dma.rx_reclaim_desc );
lp->dma.rx_reclaim_desc = NULL;
DBG_PRINT( "lp->dma.rx_reclaim_desc: 0x%p\n", lp->dma.rx_reclaim_desc );
}
/* Hand over the Rx descriptor chain to the HCF */
for( i = 0; i < NUM_RX_DESC; i++ ) {
DBG_PRINT( "lp->dma.rx_packet[%d]: 0x%p\n", i, lp->dma.rx_packet[i] );
hcf_dma_rx_put( &lp->hcfCtx, lp->dma.rx_packet[i] );
lp->dma.rx_packet[i] = NULL;
DBG_PRINT( "lp->dma.rx_packet[%d]: 0x%p\n", i, lp->dma.rx_packet[i] );
}
//}
DBG_LEAVE( DbgInfo );
return;
} // wl_pci_dma_hcf_supply
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_hcf_reclaim()
*******************************************************************************
*
* DESCRIPTION:
*
* Return DMA-related resources from the HCF. These consist of:
* - buffers and descriptors for receive purposes
* - buffers and descriptors for transmit purposes
* - one 'reclaim' descriptor for the transmit path, used to fulfill a
* certain H25 DMA engine requirement
* - one 'reclaim' descriptor for the receive path, used to fulfill a
* certain H25 DMA engine requirement
*
* This function is called at end-of-day or at re-initialization.
*
* PARAMETERS:
*
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
void wl_pci_dma_hcf_reclaim( struct wl_private *lp )
{
int i;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_hcf_reclaim" );
DBG_ENTER( DbgInfo );
wl_pci_dma_hcf_reclaim_rx( lp );
for( i = 0; i < NUM_RX_DESC; i++ ) {
DBG_PRINT( "rx_packet[%d] 0x%p\n", i, lp->dma.rx_packet[i] );
// if( lp->dma.rx_packet[i] == NULL ) {
// DBG_PRINT( "wl_pci_dma_hcf_reclaim: rx_packet[%d] NULL\n", i );
// }
}
wl_pci_dma_hcf_reclaim_tx( lp );
for( i = 0; i < NUM_TX_DESC; i++ ) {
DBG_PRINT( "tx_packet[%d] 0x%p\n", i, lp->dma.tx_packet[i] );
// if( lp->dma.tx_packet[i] == NULL ) {
// DBG_PRINT( "wl_pci_dma_hcf_reclaim: tx_packet[%d] NULL\n", i );
// }
}
DBG_LEAVE( DbgInfo );
return;
} // wl_pci_dma_hcf_reclaim
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_hcf_reclaim_rx()
*******************************************************************************
*
* DESCRIPTION:
*
* Reclaim Rx packets that have already been processed by the HCF.
*
* PARAMETERS:
*
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
void wl_pci_dma_hcf_reclaim_rx( struct wl_private *lp )
{
int i;
DESC_STRCT *p;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_hcf_reclaim_rx" );
DBG_ENTER( DbgInfo );
//if( lp->dma.status == 0 )
//{
while ( ( p = hcf_dma_rx_get( &lp->hcfCtx ) ) != NULL ) {
if( p && p->buf_addr == NULL ) {
/* A reclaim descriptor is being given back by the HCF. Reclaim
descriptors have a NULL buf_addr */
lp->dma.rx_reclaim_desc = p;
DBG_PRINT( "reclaim_descriptor: 0x%p\n", p );
continue;
}
for( i = 0; i < NUM_RX_DESC; i++ ) {
if( lp->dma.rx_packet[i] == NULL ) {
break;
}
}
/* An Rx buffer descriptor is being given back by the HCF */
lp->dma.rx_packet[i] = p;
lp->dma.rx_rsc_ind++;
DBG_PRINT( "rx_packet[%d] 0x%p\n", i, lp->dma.rx_packet[i] );
}
//}
DBG_LEAVE( DbgInfo );
} // wl_pci_dma_hcf_reclaim_rx
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_get_tx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Obtains a Tx descriptor from the chain to use for Tx.
*
* PARAMETERS:
*
* lp - a pointer to the device's wl_private structure.
*
* RETURNS:
*
* A pointer to the retrieved descriptor
*
******************************************************************************/
DESC_STRCT * wl_pci_dma_get_tx_packet( struct wl_private *lp )
{
int i;
DESC_STRCT *desc = NULL;
/*------------------------------------------------------------------------*/
for( i = 0; i < NUM_TX_DESC; i++ ) {
if( lp->dma.tx_packet[i] ) {
break;
}
}
if( i != NUM_TX_DESC ) {
desc = lp->dma.tx_packet[i];
lp->dma.tx_packet[i] = NULL;
lp->dma.tx_rsc_ind--;
memset( desc->buf_addr, 0, HCF_DMA_TX_BUF1_SIZE );
}
return desc;
} // wl_pci_dma_get_tx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_put_tx_packet()
*******************************************************************************
*
* DESCRIPTION:
*
* Returns a Tx descriptor to the chain.
*
* PARAMETERS:
*
* lp - a pointer to the device's wl_private structure.
* desc - a pointer to the descriptor to return.
*
* RETURNS:
*
* N/A
*
******************************************************************************/
void wl_pci_dma_put_tx_packet( struct wl_private *lp, DESC_STRCT *desc )
{
int i;
/*------------------------------------------------------------------------*/
for( i = 0; i < NUM_TX_DESC; i++ ) {
if( lp->dma.tx_packet[i] == NULL ) {
break;
}
}
if( i != NUM_TX_DESC ) {
lp->dma.tx_packet[i] = desc;
lp->dma.tx_rsc_ind++;
}
} // wl_pci_dma_put_tx_packet
/*============================================================================*/
/*******************************************************************************
* wl_pci_dma_hcf_reclaim_tx()
*******************************************************************************
*
* DESCRIPTION:
*
* Reclaim Tx packets that have either been processed by the HCF due to a
* port disable or a Tx completion.
*
* PARAMETERS:
*
* lp - the device's private adapter structure
*
* RETURNS:
*
* 0 on success
* errno value otherwise
*
******************************************************************************/
void wl_pci_dma_hcf_reclaim_tx( struct wl_private *lp )
{
int i;
DESC_STRCT *p;
/*------------------------------------------------------------------------*/
DBG_FUNC( "wl_pci_dma_hcf_reclaim_tx" );
DBG_ENTER( DbgInfo );
//if( lp->dma.status == 0 )
//{
while ( ( p = hcf_dma_tx_get( &lp->hcfCtx ) ) != NULL ) {
if( p != NULL && p->buf_addr == NULL ) {
/* A Reclaim descriptor is being given back by the HCF. Reclaim
descriptors have a NULL buf_addr */
lp->dma.tx_reclaim_desc = p;
DBG_PRINT( "reclaim_descriptor: 0x%p\n", p );
continue;
}
for( i = 0; i < NUM_TX_DESC; i++ ) {
if( lp->dma.tx_packet[i] == NULL ) {
break;
}
}
/* An Rx buffer descriptor is being given back by the HCF */
lp->dma.tx_packet[i] = p;
lp->dma.tx_rsc_ind++;
DBG_PRINT( "tx_packet[%d] 0x%p\n", i, lp->dma.tx_packet[i] );
}
//}
if( lp->netif_queue_on == FALSE ) {
netif_wake_queue( lp->dev );
WL_WDS_NETIF_WAKE_QUEUE( lp );
lp->netif_queue_on = TRUE;
}
DBG_LEAVE( DbgInfo );
return;
} // wl_pci_dma_hcf_reclaim_tx
/*============================================================================*/
#endif // ENABLE_DMA