Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier...

[linux-2.6-block.git] / drivers / scsi / bfa / bfa_core.c

/*
 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program 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.
 */

#include <bfa.h>
#include <defs/bfa_defs_pci.h>
#include <cs/bfa_debug.h>
#include <bfa_iocfc.h>

#define DEF_CFG_NUM_FABRICS         1
#define DEF_CFG_NUM_LPORTS          256
#define DEF_CFG_NUM_CQS             4
#define DEF_CFG_NUM_IOIM_REQS       (BFA_IOIM_MAX)
#define DEF_CFG_NUM_TSKIM_REQS      128
#define DEF_CFG_NUM_FCXP_REQS       64
#define DEF_CFG_NUM_UF_BUFS         64
#define DEF_CFG_NUM_RPORTS          1024
#define DEF_CFG_NUM_ITNIMS          (DEF_CFG_NUM_RPORTS)
#define DEF_CFG_NUM_TINS            256

#define DEF_CFG_NUM_SGPGS           2048
#define DEF_CFG_NUM_REQQ_ELEMS      256
#define DEF_CFG_NUM_RSPQ_ELEMS      64
#define DEF_CFG_NUM_SBOOT_TGTS      16
#define DEF_CFG_NUM_SBOOT_LUNS      16

/**
 * Use this function query the memory requirement of the BFA library.
 * This function needs to be called before bfa_attach() to get the
 * memory required of the BFA layer for a given driver configuration.
 *
 * This call will fail, if the cap is out of range compared to pre-defined
 * values within the BFA library
 *
 * @param[in] cfg - 	pointer to bfa_ioc_cfg_t. Driver layer should indicate
 * 			its configuration in this structure.
 *			The default values for struct bfa_iocfc_cfg_s can be
 *			fetched using bfa_cfg_get_default() API.
 *
 * 			If cap's boundary check fails, the library will use
 *			the default bfa_cap_t values (and log a warning msg).
 *
 * @param[out] meminfo - pointer to bfa_meminfo_t. This content
 * 			indicates the memory type (see bfa_mem_type_t) and
 *			amount of memory required.
 *
 *			Driver should allocate the memory, populate the
 *			starting address for each block and provide the same
 *			structure as input parameter to bfa_attach() call.
 *
 * @return void
 *
 * Special Considerations: @note
 */
void
bfa_cfg_get_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *meminfo)
{
	int             i;
	u32        km_len = 0, dm_len = 0;

	bfa_assert((cfg != NULL) && (meminfo != NULL));

	bfa_os_memset((void *)meminfo, 0, sizeof(struct bfa_meminfo_s));
	meminfo->meminfo[BFA_MEM_TYPE_KVA - 1].mem_type =
		BFA_MEM_TYPE_KVA;
	meminfo->meminfo[BFA_MEM_TYPE_DMA - 1].mem_type =
		BFA_MEM_TYPE_DMA;

	bfa_iocfc_meminfo(cfg, &km_len, &dm_len);

	for (i = 0; hal_mods[i]; i++)
		hal_mods[i]->meminfo(cfg, &km_len, &dm_len);


	meminfo->meminfo[BFA_MEM_TYPE_KVA - 1].mem_len = km_len;
	meminfo->meminfo[BFA_MEM_TYPE_DMA - 1].mem_len = dm_len;
}

/**
 * Use this function to do attach the driver instance with the BFA
 * library. This function will not trigger any HW initialization
 * process (which will be done in bfa_init() call)
 *
 * This call will fail, if the cap is out of range compared to
 * pre-defined values within the BFA library
 *
 * @param[out]	bfa	Pointer to bfa_t.
 * @param[in]	bfad 	Opaque handle back to the driver's IOC structure
 * @param[in]	cfg	Pointer to bfa_ioc_cfg_t. Should be same structure
 * 			that was used in bfa_cfg_get_meminfo().
 * @param[in] 	meminfo Pointer to bfa_meminfo_t. The driver should
 * 			use the bfa_cfg_get_meminfo() call to
 * 			find the memory blocks required, allocate the
 * 			required memory and provide the starting addresses.
 * @param[in] 	pcidev	pointer to struct bfa_pcidev_s
 *
 * @return
 * void
 *
 * Special Considerations:
 *
 * @note
 *
 */
void
bfa_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
	       struct bfa_meminfo_s *meminfo, struct bfa_pcidev_s *pcidev)
{
	int             i;
	struct bfa_mem_elem_s *melem;

	bfa->fcs = BFA_FALSE;

	bfa_assert((cfg != NULL) && (meminfo != NULL));

	/**
	 * initialize all memory pointers for iterative allocation
	 */
	for (i = 0; i < BFA_MEM_TYPE_MAX; i++) {
		melem = meminfo->meminfo + i;
		melem->kva_curp = melem->kva;
		melem->dma_curp = melem->dma;
	}

	bfa_iocfc_attach(bfa, bfad, cfg, meminfo, pcidev);

	for (i = 0; hal_mods[i]; i++)
		hal_mods[i]->attach(bfa, bfad, cfg, meminfo, pcidev);

}

/**
 * Use this function to delete a BFA IOC. IOC should be stopped (by
 * calling bfa_stop()) before this function call.
 *
 * @param[in] bfa - pointer to bfa_t.
 *
 * @return
 * void
 *
 * Special Considerations:
 *
 * @note
 */
void
bfa_detach(struct bfa_s *bfa)
{
	int	i;

	for (i = 0; hal_mods[i]; i++)
		hal_mods[i]->detach(bfa);

	bfa_iocfc_detach(bfa);
}


void
bfa_init_trc(struct bfa_s *bfa, struct bfa_trc_mod_s *trcmod)
{
	bfa->trcmod = trcmod;
}


void
bfa_init_log(struct bfa_s *bfa, struct bfa_log_mod_s *logmod)
{
	bfa->logm = logmod;
}


void
bfa_init_aen(struct bfa_s *bfa, struct bfa_aen_s *aen)
{
	bfa->aen = aen;
}

void
bfa_init_plog(struct bfa_s *bfa, struct bfa_plog_s *plog)
{
	bfa->plog = plog;
}

/**
 * Initialize IOC.
 *
 * This function will return immediately, when the IOC initialization is
 * completed, the bfa_cb_init() will be called.
 *
 * @param[in]	bfa	instance
 *
 * @return void
 *
 * Special Considerations:
 *
 * @note
 * When this function returns, the driver should register the interrupt service
 * routine(s) and enable the device interrupts. If this is not done,
 * bfa_cb_init() will never get called
 */
void
bfa_init(struct bfa_s *bfa)
{
	bfa_iocfc_init(bfa);
}

/**
 * Use this function initiate the IOC configuration setup. This function
 * will return immediately.
 *
 * @param[in]	bfa	instance
 *
 * @return None
 */
void
bfa_start(struct bfa_s *bfa)
{
	bfa_iocfc_start(bfa);
}

/**
 * Use this function quiese the IOC. This function will return immediately,
 * when the IOC is actually stopped, the bfa_cb_stop() will be called.
 *
 * @param[in] 	bfa - pointer to bfa_t.
 *
 * @return None
 *
 * Special Considerations:
 * bfa_cb_stop() could be called before or after bfa_stop() returns.
 *
 * @note
 * In case of any failure, we could handle it automatically by doing a
 * reset and then succeed the bfa_stop() call.
 */
void
bfa_stop(struct bfa_s *bfa)
{
	bfa_iocfc_stop(bfa);
}

void
bfa_comp_deq(struct bfa_s *bfa, struct list_head *comp_q)
{
	INIT_LIST_HEAD(comp_q);
	list_splice_tail_init(&bfa->comp_q, comp_q);
}

void
bfa_comp_process(struct bfa_s *bfa, struct list_head *comp_q)
{
	struct list_head        *qe;
	struct list_head        *qen;
	struct bfa_cb_qe_s   *hcb_qe;

	list_for_each_safe(qe, qen, comp_q) {
		hcb_qe = (struct bfa_cb_qe_s *) qe;
		hcb_qe->cbfn(hcb_qe->cbarg, BFA_TRUE);
	}
}

void
bfa_comp_free(struct bfa_s *bfa, struct list_head *comp_q)
{
	struct list_head        *qe;
	struct bfa_cb_qe_s   *hcb_qe;

	while (!list_empty(comp_q)) {
		bfa_q_deq(comp_q, &qe);
		hcb_qe = (struct bfa_cb_qe_s *) qe;
		hcb_qe->cbfn(hcb_qe->cbarg, BFA_FALSE);
	}
}

void
bfa_attach_fcs(struct bfa_s *bfa)
{
	bfa->fcs = BFA_TRUE;
}

/**
 * Periodic timer heart beat from driver
 */
void
bfa_timer_tick(struct bfa_s *bfa)
{
	bfa_timer_beat(&bfa->timer_mod);
}

#ifndef BFA_BIOS_BUILD
/**
 * Return the list of PCI vendor/device id lists supported by this
 * BFA instance.
 */
void
bfa_get_pciids(struct bfa_pciid_s **pciids, int *npciids)
{
	static struct bfa_pciid_s __pciids[] = {
		{BFA_PCI_VENDOR_ID_BROCADE, BFA_PCI_DEVICE_ID_FC_8G2P},
		{BFA_PCI_VENDOR_ID_BROCADE, BFA_PCI_DEVICE_ID_FC_8G1P},
		{BFA_PCI_VENDOR_ID_BROCADE, BFA_PCI_DEVICE_ID_CT},
	};

	*npciids = sizeof(__pciids) / sizeof(__pciids[0]);
	*pciids = __pciids;
}

/**
 * Use this function query the default struct bfa_iocfc_cfg_s value (compiled
 * into BFA layer). The OS driver can then turn back and overwrite entries that
 * have been configured by the user.
 *
 * @param[in] cfg - pointer to bfa_ioc_cfg_t
 *
 * @return
 *	void
 *
 * Special Considerations:
 * 	note
 */
void
bfa_cfg_get_default(struct bfa_iocfc_cfg_s *cfg)
{
	cfg->fwcfg.num_fabrics = DEF_CFG_NUM_FABRICS;
	cfg->fwcfg.num_lports = DEF_CFG_NUM_LPORTS;
	cfg->fwcfg.num_rports = DEF_CFG_NUM_RPORTS;
	cfg->fwcfg.num_ioim_reqs = DEF_CFG_NUM_IOIM_REQS;
	cfg->fwcfg.num_tskim_reqs = DEF_CFG_NUM_TSKIM_REQS;
	cfg->fwcfg.num_fcxp_reqs = DEF_CFG_NUM_FCXP_REQS;
	cfg->fwcfg.num_uf_bufs = DEF_CFG_NUM_UF_BUFS;
	cfg->fwcfg.num_cqs = DEF_CFG_NUM_CQS;

	cfg->drvcfg.num_reqq_elems = DEF_CFG_NUM_REQQ_ELEMS;
	cfg->drvcfg.num_rspq_elems = DEF_CFG_NUM_RSPQ_ELEMS;
	cfg->drvcfg.num_sgpgs = DEF_CFG_NUM_SGPGS;
	cfg->drvcfg.num_sboot_tgts = DEF_CFG_NUM_SBOOT_TGTS;
	cfg->drvcfg.num_sboot_luns = DEF_CFG_NUM_SBOOT_LUNS;
	cfg->drvcfg.path_tov = BFA_FCPIM_PATHTOV_DEF;
	cfg->drvcfg.ioc_recover = BFA_FALSE;
	cfg->drvcfg.delay_comp = BFA_FALSE;

}

void
bfa_cfg_get_min(struct bfa_iocfc_cfg_s *cfg)
{
	bfa_cfg_get_default(cfg);
	cfg->fwcfg.num_ioim_reqs   = BFA_IOIM_MIN;
	cfg->fwcfg.num_tskim_reqs  = BFA_TSKIM_MIN;
	cfg->fwcfg.num_fcxp_reqs   = BFA_FCXP_MIN;
	cfg->fwcfg.num_uf_bufs     = BFA_UF_MIN;
	cfg->fwcfg.num_rports      = BFA_RPORT_MIN;

	cfg->drvcfg.num_sgpgs      = BFA_SGPG_MIN;
	cfg->drvcfg.num_reqq_elems = BFA_REQQ_NELEMS_MIN;
	cfg->drvcfg.num_rspq_elems = BFA_RSPQ_NELEMS_MIN;
	cfg->drvcfg.min_cfg        = BFA_TRUE;
}

void
bfa_get_attr(struct bfa_s *bfa, struct bfa_ioc_attr_s *ioc_attr)
{
	bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
}

/**
 * Retrieve firmware trace information on IOC failure.
 */
bfa_status_t
bfa_debug_fwsave(struct bfa_s *bfa, void *trcdata, int *trclen)
{
	return bfa_ioc_debug_fwsave(&bfa->ioc, trcdata, trclen);
}

/**
 * Clear the saved firmware trace information of an IOC.
 */
void
bfa_debug_fwsave_clear(struct bfa_s *bfa)
{
	bfa_ioc_debug_fwsave_clear(&bfa->ioc);
}

/**
 * 		Fetch firmware trace data.
 *
 * @param[in]		bfa			BFA instance
 * @param[out]		trcdata		Firmware trace buffer
 * @param[in,out]	trclen		Firmware trace buffer len
 *
 * @retval BFA_STATUS_OK			Firmware trace is fetched.
 * @retval BFA_STATUS_INPROGRESS	Firmware trace fetch is in progress.
 */
bfa_status_t
bfa_debug_fwtrc(struct bfa_s *bfa, void *trcdata, int *trclen)
{
	return bfa_ioc_debug_fwtrc(&bfa->ioc, trcdata, trclen);
}

/**
 * Reset hw semaphore & usage cnt regs and initialize.
 */
void
bfa_chip_reset(struct bfa_s *bfa)
{
	bfa_ioc_ownership_reset(&bfa->ioc);
	bfa_ioc_pll_init(&bfa->ioc);
}
#endif