drivers/scsi/aic94xx/aic94xx_hwi.h - maze/linux - Git at Google

 /*
  * Aic94xx SAS/SATA driver hardware interface header file.
  *
  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
  *
  * This file is licensed under GPLv2.
  *
  * This file is part of the aic94xx driver.
  *
  * The aic94xx driver is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; version 2 of the
  * License.
  *
  * The aic94xx driver is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with the aic94xx driver; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */

 #ifndef _AIC94XX_HWI_H_
 #define _AIC94XX_HWI_H_

 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>

 #include <scsi/libsas.h>

 #include "aic94xx.h"
 #include "aic94xx_sas.h"

 /* Define ASD_MAX_PHYS to the maximum phys ever. Currently 8. */
 #define ASD_MAX_PHYS       8
 #define ASD_PCBA_SN_SIZE   12

 struct asd_ha_addrspace {
 	void __iomem  *addr;
 	unsigned long  start;       /* pci resource start */
 	unsigned long  len;         /* pci resource len */
 	unsigned long  flags;       /* pci resource flags */

 	/* addresses internal to the host adapter */
 	u32 swa_base; /* mmspace 1 (MBAR1) uses this only */
 	u32 swb_base;
 	u32 swc_base;
 };

 struct bios_struct {
 	int    present;
 	u8     maj;
 	u8     min;
 	u32    bld;
 };

 struct unit_element_struct {
 	u16    num;
 	u16    size;
 	void   *area;
 };

 struct flash_struct {
 	u32    bar;
 	int    present;
 	int    wide;
 	u8     manuf;
 	u8     dev_id;
 	u8     sec_prot;
 	u8     method;

 	u32    dir_offs;
 };

 struct asd_phy_desc {
 	/* From CTRL-A settings, then set to what is appropriate */
 	u8     sas_addr[SAS_ADDR_SIZE];
 	u8     max_sas_lrate;
 	u8     min_sas_lrate;
 	u8     max_sata_lrate;
 	u8     min_sata_lrate;
 	u8     flags;
 #define ASD_CRC_DIS  1
 #define ASD_SATA_SPINUP_HOLD 2

 	u8     phy_control_0; /* mode 5 reg 0x160 */
 	u8     phy_control_1; /* mode 5 reg 0x161 */
 	u8     phy_control_2; /* mode 5 reg 0x162 */
 	u8     phy_control_3; /* mode 5 reg 0x163 */
 };

 struct asd_dma_tok {
 	void *vaddr;
 	dma_addr_t dma_handle;
 	size_t size;
 };

 struct hw_profile {
 	struct bios_struct bios;
 	struct unit_element_struct ue;
 	struct flash_struct flash;

 	u8     sas_addr[SAS_ADDR_SIZE];
 	char   pcba_sn[ASD_PCBA_SN_SIZE+1];

 	u8     enabled_phys;	  /* mask of enabled phys */
 	struct asd_phy_desc phy_desc[ASD_MAX_PHYS];
 	u32    max_scbs;	  /* absolute sequencer scb queue size */
 	struct asd_dma_tok *scb_ext;
 	u32    max_ddbs;
 	struct asd_dma_tok *ddb_ext;

 	spinlock_t ddb_lock;
 	void  *ddb_bitmap;

 	int    num_phys;	  /* ENABLEABLE */
 	int    max_phys;	  /* REPORTED + ENABLEABLE */

 	unsigned addr_range;	  /* max # of addrs; max # of possible ports */
 	unsigned port_name_base;
 	unsigned dev_name_base;
 	unsigned sata_name_base;
 };

 struct asd_ascb {
 	struct list_head list;
 	struct asd_ha_struct *ha;

 	struct scb *scb;	  /* equals dma_scb->vaddr */
 	struct asd_dma_tok dma_scb;
 	struct asd_dma_tok *sg_arr;

 	void (*tasklet_complete)(struct asd_ascb *, struct done_list_struct *);
 	u8     uldd_timer:1;

 	/* internally generated command */
 	struct timer_list timer;
 	struct completion *completion;
 	u8        tag_valid:1;
 	__be16    tag;		  /* error recovery only */

 	/* If this is an Empty SCB, index of first edb in seq->edb_arr. */
 	int    edb_index;

 	/* Used by the timer timeout function. */
 	int    tc_index;

 	void   *uldd_task;
 };

 #define ASD_DL_SIZE_BITS   0x8
 #define ASD_DL_SIZE        (1<<(2+ASD_DL_SIZE_BITS))
 #define ASD_DEF_DL_TOGGLE  0x01

 struct asd_seq_data {
 	spinlock_t pend_q_lock;
 	u16    scbpro;
 	int    pending;
 	struct list_head pend_q;
 	int    can_queue;	  /* per adapter */
 	struct asd_dma_tok next_scb; /* next scb to be delivered to CSEQ */

 	spinlock_t tc_index_lock;
 	void **tc_index_array;
 	void *tc_index_bitmap;
 	int   tc_index_bitmap_bits;

 	struct tasklet_struct dl_tasklet;
 	struct done_list_struct *dl; /* array of done list entries, equals */
 	struct asd_dma_tok *actual_dl; /* actual_dl->vaddr */
 	int    dl_toggle;
 	int    dl_next;

 	int    num_edbs;
 	struct asd_dma_tok **edb_arr;
 	int    num_escbs;
 	struct asd_ascb **escb_arr; /* array of pointers to escbs */
 };

 /* This is an internal port structure. These are used to get accurate
  * phy_mask for updating DDB 0.
  */
 struct asd_port {
 	u8  sas_addr[SAS_ADDR_SIZE];
 	u8  attached_sas_addr[SAS_ADDR_SIZE];
 	u32 phy_mask;
 	int num_phys;
 };

 /* This is the Host Adapter structure.  It describes the hardware
  * SAS adapter.
  */
 struct asd_ha_struct {
 	struct pci_dev   *pcidev;
 	const char       *name;

 	struct sas_ha_struct sas_ha;

 	u8                revision_id;

 	int               iospace;
 	spinlock_t        iolock;
 	struct asd_ha_addrspace io_handle[2];

 	struct hw_profile hw_prof;

 	struct asd_phy    phys[ASD_MAX_PHYS];
 	spinlock_t        asd_ports_lock;
 	struct asd_port   asd_ports[ASD_MAX_PHYS];
 	struct asd_sas_port   ports[ASD_MAX_PHYS];

 	struct dma_pool  *scb_pool;

 	struct asd_seq_data  seq; /* sequencer related */
 	u32    bios_status;
 	const struct firmware *bios_image;
 };

 /* ---------- Common macros ---------- */

 #define ASD_BUSADDR_LO(__dma_handle) ((u32)(__dma_handle))
 #define ASD_BUSADDR_HI(__dma_handle) (((sizeof(dma_addr_t))==8)     \
                                     ? ((u32)((__dma_handle) >> 32)) \
                                     : ((u32)0))

 #define dev_to_asd_ha(__dev)  pci_get_drvdata(to_pci_dev(__dev))
 #define SCB_SITE_VALID(__site_no) (((__site_no) & 0xF0FF) != 0x00FF   \
 				 && ((__site_no) & 0xF0FF) > 0x001F)
 /* For each bit set in __lseq_mask, set __lseq to equal the bit
  * position of the set bit and execute the statement following.
  * __mc is the temporary mask, used as a mask "counter".
  */
 #define for_each_sequencer(__lseq_mask, __mc, __lseq)                        \
 	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 		if (((__mc) & 1))
 #define for_each_phy(__lseq_mask, __mc, __lseq)                              \
 	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 		if (((__mc) & 1))

 #define PHY_ENABLED(_HA, _I) ((_HA)->hw_prof.enabled_phys & (1<<(_I)))

 /* ---------- DMA allocs ---------- */

 static inline struct asd_dma_tok *asd_dmatok_alloc(gfp_t flags)
 {
 	return kmem_cache_alloc(asd_dma_token_cache, flags);
 }

 static inline void asd_dmatok_free(struct asd_dma_tok *token)
 {
 	kmem_cache_free(asd_dma_token_cache, token);
 }

 static inline struct asd_dma_tok *asd_alloc_coherent(struct asd_ha_struct *
 						     asd_ha, size_t size,
 						     gfp_t flags)
 {
 	struct asd_dma_tok *token = asd_dmatok_alloc(flags);
 	if (token) {
 		token->size = size;
 		token->vaddr = dma_alloc_coherent(&asd_ha->pcidev->dev,
 						  token->size,
 						  &token->dma_handle,
 						  flags);
 		if (!token->vaddr) {
 			asd_dmatok_free(token);
 			token = NULL;
 		}
 	}
 	return token;
 }

 static inline void asd_free_coherent(struct asd_ha_struct *asd_ha,
 				     struct asd_dma_tok *token)
 {
 	if (token) {
 		dma_free_coherent(&asd_ha->pcidev->dev, token->size,
 				  token->vaddr, token->dma_handle);
 		asd_dmatok_free(token);
 	}
 }

 static inline void asd_init_ascb(struct asd_ha_struct *asd_ha,
 				 struct asd_ascb *ascb)
 {
 	INIT_LIST_HEAD(&ascb->list);
 	ascb->scb = ascb->dma_scb.vaddr;
 	ascb->ha = asd_ha;
 	ascb->timer.function = NULL;
 	init_timer(&ascb->timer);
 	ascb->tc_index = -1;
 }

 /* Must be called with the tc_index_lock held!
  */
 static inline void asd_tc_index_release(struct asd_seq_data *seq, int index)
 {
 	seq->tc_index_array[index] = NULL;
 	clear_bit(index, seq->tc_index_bitmap);
 }

 /* Must be called with the tc_index_lock held!
  */
 static inline int asd_tc_index_get(struct asd_seq_data *seq, void *ptr)
 {
 	int index;

 	index = find_first_zero_bit(seq->tc_index_bitmap,
 				    seq->tc_index_bitmap_bits);
 	if (index == seq->tc_index_bitmap_bits)
 		return -1;

 	seq->tc_index_array[index] = ptr;
 	set_bit(index, seq->tc_index_bitmap);

 	return index;
 }

 /* Must be called with the tc_index_lock held!
  */
 static inline void *asd_tc_index_find(struct asd_seq_data *seq, int index)
 {
 	return seq->tc_index_array[index];
 }

 /**
  * asd_ascb_free -- free a single aSCB after is has completed
  * @ascb: pointer to the aSCB of interest
  *
  * This frees an aSCB after it has been executed/completed by
  * the sequencer.
  */
 static inline void asd_ascb_free(struct asd_ascb *ascb)
 {
 	if (ascb) {
 		struct asd_ha_struct *asd_ha = ascb->ha;
 		unsigned long flags;

 		BUG_ON(!list_empty(&ascb->list));
 		spin_lock_irqsave(&ascb->ha->seq.tc_index_lock, flags);
 		asd_tc_index_release(&ascb->ha->seq, ascb->tc_index);
 		spin_unlock_irqrestore(&ascb->ha->seq.tc_index_lock, flags);
 		dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr,
 			      ascb->dma_scb.dma_handle);
 		kmem_cache_free(asd_ascb_cache, ascb);
 	}
 }

 /**
  * asd_ascb_list_free -- free a list of ascbs
  * @ascb_list: a list of ascbs
  *
  * This function will free a list of ascbs allocated by asd_ascb_alloc_list.
  * It is used when say the scb queueing function returned QUEUE_FULL,
  * and we do not need the ascbs any more.
  */
 static inline void asd_ascb_free_list(struct asd_ascb *ascb_list)
 {
 	LIST_HEAD(list);
 	struct list_head *n, *pos;

 	__list_add(&list, ascb_list->list.prev, &ascb_list->list);
 	list_for_each_safe(pos, n, &list) {
 		list_del_init(pos);
 		asd_ascb_free(list_entry(pos, struct asd_ascb, list));
 	}
 }

 /* ---------- Function declarations ---------- */

 int  asd_init_hw(struct asd_ha_struct *asd_ha);
 irqreturn_t asd_hw_isr(int irq, void *dev_id);


 struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct
 				     *asd_ha, int *num,
 				     gfp_t gfp_mask);

 int  asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 			int num);
 int  asd_post_escb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 			int num);

 int  asd_init_post_escbs(struct asd_ha_struct *asd_ha);
 void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc);
 void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 int  asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask);

 void asd_ascb_timedout(unsigned long data);
 int  asd_chip_hardrst(struct asd_ha_struct *asd_ha);

 #endif
	/*
	* Aic94xx SAS/SATA driver hardware interface header file.
	*
	* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
	* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
	*
	* This file is licensed under GPLv2.
	*
	* This file is part of the aic94xx driver.
	*
	* The aic94xx driver is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; version 2 of the
	* License.
	*
	* The aic94xx driver is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with the aic94xx driver; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*
	*/

	#ifndef _AIC94XX_HWI_H_
	#define _AIC94XX_HWI_H_

	#include <linux/interrupt.h>
	#include <linux/pci.h>
	#include <linux/dma-mapping.h>

	#include <scsi/libsas.h>

	#include "aic94xx.h"
	#include "aic94xx_sas.h"

	/* Define ASD_MAX_PHYS to the maximum phys ever. Currently 8. */
	#define ASD_MAX_PHYS 8
	#define ASD_PCBA_SN_SIZE 12

	struct asd_ha_addrspace {
	void __iomem *addr;
	unsigned long start; /* pci resource start */
	unsigned long len; /* pci resource len */
	unsigned long flags; /* pci resource flags */

	/* addresses internal to the host adapter */
	u32 swa_base; /* mmspace 1 (MBAR1) uses this only */
	u32 swb_base;
	u32 swc_base;
	};

	struct bios_struct {
	int present;
	u8 maj;
	u8 min;
	u32 bld;
	};

	struct unit_element_struct {
	u16 num;
	u16 size;
	void *area;
	};

	struct flash_struct {
	u32 bar;
	int present;
	int wide;
	u8 manuf;
	u8 dev_id;
	u8 sec_prot;
	u8 method;

	u32 dir_offs;
	};

	struct asd_phy_desc {
	/* From CTRL-A settings, then set to what is appropriate */
	u8 sas_addr[SAS_ADDR_SIZE];
	u8 max_sas_lrate;
	u8 min_sas_lrate;
	u8 max_sata_lrate;
	u8 min_sata_lrate;
	u8 flags;
	#define ASD_CRC_DIS 1
	#define ASD_SATA_SPINUP_HOLD 2

	u8 phy_control_0; /* mode 5 reg 0x160 */
	u8 phy_control_1; /* mode 5 reg 0x161 */
	u8 phy_control_2; /* mode 5 reg 0x162 */
	u8 phy_control_3; /* mode 5 reg 0x163 */
	};

	struct asd_dma_tok {
	void *vaddr;
	dma_addr_t dma_handle;
	size_t size;
	};

	struct hw_profile {
	struct bios_struct bios;
	struct unit_element_struct ue;
	struct flash_struct flash;

	u8 sas_addr[SAS_ADDR_SIZE];
	char pcba_sn[ASD_PCBA_SN_SIZE+1];

	u8 enabled_phys; /* mask of enabled phys */
	struct asd_phy_desc phy_desc[ASD_MAX_PHYS];
	u32 max_scbs; /* absolute sequencer scb queue size */
	struct asd_dma_tok *scb_ext;
	u32 max_ddbs;
	struct asd_dma_tok *ddb_ext;

	spinlock_t ddb_lock;
	void *ddb_bitmap;

	int num_phys; /* ENABLEABLE */
	int max_phys; /* REPORTED + ENABLEABLE */

	unsigned addr_range; /* max # of addrs; max # of possible ports */
	unsigned port_name_base;
	unsigned dev_name_base;
	unsigned sata_name_base;
	};

	struct asd_ascb {
	struct list_head list;
	struct asd_ha_struct *ha;

	struct scb scb; / equals dma_scb->vaddr */
	struct asd_dma_tok dma_scb;
	struct asd_dma_tok *sg_arr;

	void (tasklet_complete)(struct asd_ascb , struct done_list_struct *);
	u8 uldd_timer:1;

	/* internally generated command */
	struct timer_list timer;
	struct completion *completion;
	u8 tag_valid:1;
	__be16 tag; /* error recovery only */

	/* If this is an Empty SCB, index of first edb in seq->edb_arr. */
	int edb_index;

	/* Used by the timer timeout function. */
	int tc_index;

	void *uldd_task;
	};

	#define ASD_DL_SIZE_BITS 0x8
	#define ASD_DL_SIZE (1<<(2+ASD_DL_SIZE_BITS))
	#define ASD_DEF_DL_TOGGLE 0x01

	struct asd_seq_data {
	spinlock_t pend_q_lock;
	u16 scbpro;
	int pending;
	struct list_head pend_q;
	int can_queue; /* per adapter */
	struct asd_dma_tok next_scb; /* next scb to be delivered to CSEQ */

	spinlock_t tc_index_lock;
	void **tc_index_array;
	void *tc_index_bitmap;
	int tc_index_bitmap_bits;

	struct tasklet_struct dl_tasklet;
	struct done_list_struct dl; / array of done list entries, equals */
	struct asd_dma_tok actual_dl; / actual_dl->vaddr */
	int dl_toggle;
	int dl_next;

	int num_edbs;
	struct asd_dma_tok **edb_arr;
	int num_escbs;
	struct asd_ascb *escb_arr; / array of pointers to escbs */
	};

	/* This is an internal port structure. These are used to get accurate
	* phy_mask for updating DDB 0.
	*/
	struct asd_port {
	u8 sas_addr[SAS_ADDR_SIZE];
	u8 attached_sas_addr[SAS_ADDR_SIZE];
	u32 phy_mask;
	int num_phys;
	};

	/* This is the Host Adapter structure. It describes the hardware
	* SAS adapter.
	*/
	struct asd_ha_struct {
	struct pci_dev *pcidev;
	const char *name;

	struct sas_ha_struct sas_ha;

	u8 revision_id;

	int iospace;
	spinlock_t iolock;
	struct asd_ha_addrspace io_handle[2];

	struct hw_profile hw_prof;

	struct asd_phy phys[ASD_MAX_PHYS];
	spinlock_t asd_ports_lock;
	struct asd_port asd_ports[ASD_MAX_PHYS];
	struct asd_sas_port ports[ASD_MAX_PHYS];

	struct dma_pool *scb_pool;

	struct asd_seq_data seq; /* sequencer related */
	u32 bios_status;
	const struct firmware *bios_image;
	};

	/* ---------- Common macros ---------- */

	#define ASD_BUSADDR_LO(__dma_handle) ((u32)(__dma_handle))
	#define ASD_BUSADDR_HI(__dma_handle) (((sizeof(dma_addr_t))==8) \
	? ((u32)((__dma_handle) >> 32)) \
	: ((u32)0))

	#define dev_to_asd_ha(__dev) pci_get_drvdata(to_pci_dev(__dev))
	#define SCB_SITE_VALID(__site_no) (((__site_no) & 0xF0FF) != 0x00FF \
	&& ((__site_no) & 0xF0FF) > 0x001F)
	/* For each bit set in __lseq_mask, set __lseq to equal the bit
	* position of the set bit and execute the statement following.
	* __mc is the temporary mask, used as a mask "counter".
	*/
	#define for_each_sequencer(__lseq_mask, __mc, __lseq) \
	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
	if (((__mc) & 1))
	#define for_each_phy(__lseq_mask, __mc, __lseq) \
	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
	if (((__mc) & 1))

	#define PHY_ENABLED(_HA, _I) ((_HA)->hw_prof.enabled_phys & (1<<(_I)))

	/* ---------- DMA allocs ---------- */

	static inline struct asd_dma_tok *asd_dmatok_alloc(gfp_t flags)
	{
	return kmem_cache_alloc(asd_dma_token_cache, flags);
	}

	static inline void asd_dmatok_free(struct asd_dma_tok *token)
	{
	kmem_cache_free(asd_dma_token_cache, token);
	}

	static inline struct asd_dma_tok asd_alloc_coherent(struct asd_ha_struct
	asd_ha, size_t size,
	gfp_t flags)
	{
	struct asd_dma_tok *token = asd_dmatok_alloc(flags);
	if (token) {
	token->size = size;
	token->vaddr = dma_alloc_coherent(&asd_ha->pcidev->dev,
	token->size,
	&token->dma_handle,
	flags);
	if (!token->vaddr) {
	asd_dmatok_free(token);
	token = NULL;
	}
	}
	return token;
	}

	static inline void asd_free_coherent(struct asd_ha_struct *asd_ha,
	struct asd_dma_tok *token)
	{
	if (token) {
	dma_free_coherent(&asd_ha->pcidev->dev, token->size,
	token->vaddr, token->dma_handle);
	asd_dmatok_free(token);
	}
	}

	static inline void asd_init_ascb(struct asd_ha_struct *asd_ha,
	struct asd_ascb *ascb)
	{
	INIT_LIST_HEAD(&ascb->list);
	ascb->scb = ascb->dma_scb.vaddr;
	ascb->ha = asd_ha;
	ascb->timer.function = NULL;
	init_timer(&ascb->timer);
	ascb->tc_index = -1;
	}

	/* Must be called with the tc_index_lock held!
	*/
	static inline void asd_tc_index_release(struct asd_seq_data *seq, int index)
	{
	seq->tc_index_array[index] = NULL;
	clear_bit(index, seq->tc_index_bitmap);
	}

	/* Must be called with the tc_index_lock held!
	*/
	static inline int asd_tc_index_get(struct asd_seq_data seq, void ptr)
	{
	int index;

	index = find_first_zero_bit(seq->tc_index_bitmap,
	seq->tc_index_bitmap_bits);
	if (index == seq->tc_index_bitmap_bits)
	return -1;

	seq->tc_index_array[index] = ptr;
	set_bit(index, seq->tc_index_bitmap);

	return index;
	}

	/* Must be called with the tc_index_lock held!
	*/
	static inline void asd_tc_index_find(struct asd_seq_data seq, int index)
	{
	return seq->tc_index_array[index];
	}

	/**
	* asd_ascb_free -- free a single aSCB after is has completed
	* @ascb: pointer to the aSCB of interest
	*
	* This frees an aSCB after it has been executed/completed by
	* the sequencer.
	*/
	static inline void asd_ascb_free(struct asd_ascb *ascb)
	{
	if (ascb) {
	struct asd_ha_struct *asd_ha = ascb->ha;
	unsigned long flags;

	BUG_ON(!list_empty(&ascb->list));
	spin_lock_irqsave(&ascb->ha->seq.tc_index_lock, flags);
	asd_tc_index_release(&ascb->ha->seq, ascb->tc_index);
	spin_unlock_irqrestore(&ascb->ha->seq.tc_index_lock, flags);
	dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr,
	ascb->dma_scb.dma_handle);
	kmem_cache_free(asd_ascb_cache, ascb);
	}
	}

	/**
	* asd_ascb_list_free -- free a list of ascbs
	* @ascb_list: a list of ascbs
	*
	* This function will free a list of ascbs allocated by asd_ascb_alloc_list.
	* It is used when say the scb queueing function returned QUEUE_FULL,
	* and we do not need the ascbs any more.
	*/
	static inline void asd_ascb_free_list(struct asd_ascb *ascb_list)
	{
	LIST_HEAD(list);
	struct list_head n, pos;

	__list_add(&list, ascb_list->list.prev, &ascb_list->list);
	list_for_each_safe(pos, n, &list) {
	list_del_init(pos);
	asd_ascb_free(list_entry(pos, struct asd_ascb, list));
	}
	}

	/* ---------- Function declarations ---------- */

	int asd_init_hw(struct asd_ha_struct *asd_ha);
	irqreturn_t asd_hw_isr(int irq, void *dev_id);


	struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct
	asd_ha, int num,
	gfp_t gfp_mask);

	int asd_post_ascb_list(struct asd_ha_struct asd_ha, struct asd_ascb ascb,
	int num);
	int asd_post_escb_list(struct asd_ha_struct asd_ha, struct asd_ascb ascb,
	int num);

	int asd_init_post_escbs(struct asd_ha_struct *asd_ha);
	void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc);
	void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
	void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
	int asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask);

	void asd_ascb_timedout(unsigned long data);
	int asd_chip_hardrst(struct asd_ha_struct *asd_ha);

	#endif