diff options
Diffstat (limited to 'drivers/staging/benet/cq.c')
| -rw-r--r-- | drivers/staging/benet/cq.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/drivers/staging/benet/cq.c b/drivers/staging/benet/cq.c deleted file mode 100644 index 650458645433..000000000000 --- a/drivers/staging/benet/cq.c +++ /dev/null @@ -1,211 +0,0 @@ -/* - * Copyright (C) 2005 - 2008 ServerEngines - * All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. The full GNU General - * Public License is included in this distribution in the file called COPYING. - * - * Contact Information: - * linux-drivers@serverengines.com - * - * ServerEngines - * 209 N. Fair Oaks Ave - * Sunnyvale, CA 94085 - */ -#include "hwlib.h" -#include "bestatus.h" - -/* - * Completion Queue Objects - */ -/* - *============================================================================ - * P U B L I C R O U T I N E S - *============================================================================ - */ - -/* - This routine creates a completion queue based on the client completion - queue configuration information. - - - FunctionObject - Handle to a function object - CqBaseVa - Base VA for a the CQ ring - NumEntries - CEV_CQ_CNT_* values - solEventEnable - 0 = All CQEs can generate Events if CQ is eventable - 1 = only CQEs with solicited bit set are eventable - eventable - Eventable CQ, generates interrupts. - nodelay - 1 = Force interrupt, relevent if CQ eventable. - Interrupt is asserted immediately after EQE - write is confirmed, regardless of EQ Timer - or watermark settings. - wme - Enable watermark based coalescing - wmThresh - High watermark(CQ fullness at which event - or interrupt should be asserted). These are the - CEV_WATERMARK encoded values. - EqObject - EQ Handle to assign to this CQ - ppCqObject - Internal CQ Handle returned. - - Returns BE_SUCCESS if successfull, otherwise a useful error code is - returned. - - IRQL < DISPATCH_LEVEL - -*/ -int be_cq_create(struct be_function_object *pfob, - struct ring_desc *rd, u32 length, bool solicited_eventable, - bool no_delay, u32 wm_thresh, - struct be_eq_object *eq_object, struct be_cq_object *cq_object) -{ - int status = BE_SUCCESS; - u32 num_entries_encoding; - u32 num_entries = length / sizeof(struct MCC_CQ_ENTRY_AMAP); - struct FWCMD_COMMON_CQ_CREATE *fwcmd = NULL; - struct MCC_WRB_AMAP *wrb = NULL; - u32 n; - unsigned long irql; - - ASSERT(rd); - ASSERT(cq_object); - ASSERT(length % sizeof(struct MCC_CQ_ENTRY_AMAP) == 0); - - switch (num_entries) { - case 256: - num_entries_encoding = CEV_CQ_CNT_256; - break; - case 512: - num_entries_encoding = CEV_CQ_CNT_512; - break; - case 1024: - num_entries_encoding = CEV_CQ_CNT_1024; - break; - default: - ASSERT(0); - return BE_STATUS_INVALID_PARAMETER; - } - - /* - * All cq entries all the same size. Use iSCSI version - * as a test for the proper rd length. - */ - memset(cq_object, 0, sizeof(*cq_object)); - - atomic_set(&cq_object->ref_count, 0); - cq_object->parent_function = pfob; - cq_object->eq_object = eq_object; - cq_object->num_entries = num_entries; - /* save for MCC cq processing */ - cq_object->va = rd->va; - - /* map into UT. */ - length = num_entries * sizeof(struct MCC_CQ_ENTRY_AMAP); - - spin_lock_irqsave(&pfob->post_lock, irql); - - wrb = be_function_peek_mcc_wrb(pfob); - if (!wrb) { - ASSERT(wrb); - TRACE(DL_ERR, "No free MCC WRBs in create EQ."); - status = BE_STATUS_NO_MCC_WRB; - goto Error; - } - /* Prepares an embedded fwcmd, including request/response sizes. */ - fwcmd = BE_PREPARE_EMBEDDED_FWCMD(pfob, wrb, COMMON_CQ_CREATE); - - fwcmd->params.request.num_pages = PAGES_SPANNED(OFFSET_IN_PAGE(rd->va), - length); - - AMAP_SET_BITS_PTR(CQ_CONTEXT, valid, &fwcmd->params.request.context, 1); - n = pfob->pci_function_number; - AMAP_SET_BITS_PTR(CQ_CONTEXT, Func, &fwcmd->params.request.context, n); - - n = (eq_object != NULL); - AMAP_SET_BITS_PTR(CQ_CONTEXT, Eventable, - &fwcmd->params.request.context, n); - AMAP_SET_BITS_PTR(CQ_CONTEXT, Armed, &fwcmd->params.request.context, 1); - - n = eq_object ? eq_object->eq_id : 0; - AMAP_SET_BITS_PTR(CQ_CONTEXT, EQID, &fwcmd->params.request.context, n); - AMAP_SET_BITS_PTR(CQ_CONTEXT, Count, - &fwcmd->params.request.context, num_entries_encoding); - - n = 0; /* Protection Domain is always 0 in Linux driver */ - AMAP_SET_BITS_PTR(CQ_CONTEXT, PD, &fwcmd->params.request.context, n); - AMAP_SET_BITS_PTR(CQ_CONTEXT, NoDelay, - &fwcmd->params.request.context, no_delay); - AMAP_SET_BITS_PTR(CQ_CONTEXT, SolEvent, - &fwcmd->params.request.context, solicited_eventable); - - n = (wm_thresh != 0xFFFFFFFF); - AMAP_SET_BITS_PTR(CQ_CONTEXT, WME, &fwcmd->params.request.context, n); - - n = (n ? wm_thresh : 0); - AMAP_SET_BITS_PTR(CQ_CONTEXT, Watermark, - &fwcmd->params.request.context, n); - /* Create a page list for the FWCMD. */ - be_rd_to_pa_list(rd, fwcmd->params.request.pages, - ARRAY_SIZE(fwcmd->params.request.pages)); - - /* Post the f/w command */ - status = be_function_post_mcc_wrb(pfob, wrb, NULL, NULL, NULL, - NULL, NULL, fwcmd, NULL); - if (status != BE_SUCCESS) { - TRACE(DL_ERR, "MCC to create CQ failed."); - goto Error; - } - /* Remember the CQ id. */ - cq_object->cq_id = fwcmd->params.response.cq_id; - - /* insert this cq into eq_object reference */ - if (eq_object) { - atomic_inc(&eq_object->ref_count); - list_add_tail(&cq_object->cqlist_for_eq, - &eq_object->cq_list_head); - } - -Error: - spin_unlock_irqrestore(&pfob->post_lock, irql); - - if (pfob->pend_queue_driving && pfob->mcc) { - pfob->pend_queue_driving = 0; - be_drive_mcc_wrb_queue(pfob->mcc); - } - return status; -} - -/* - - Deferences the given object. Once the object's reference count drops to - zero, the object is destroyed and all resources that are held by this object - are released. The on-chip context is also destroyed along with the queue - ID, and any mappings made into the UT. - - cq_object - CQ handle returned from cq_object_create. - - returns the current reference count on the object - - IRQL: IRQL < DISPATCH_LEVEL -*/ -int be_cq_destroy(struct be_cq_object *cq_object) -{ - int status = 0; - - /* Nothing should reference this CQ at this point. */ - ASSERT(atomic_read(&cq_object->ref_count) == 0); - - /* Send fwcmd to destroy the CQ. */ - status = be_function_ring_destroy(cq_object->parent_function, - cq_object->cq_id, FWCMD_RING_TYPE_CQ, - NULL, NULL, NULL, NULL); - ASSERT(status == 0); - - /* Remove reference if this is an eventable CQ. */ - if (cq_object->eq_object) { - atomic_dec(&cq_object->eq_object->ref_count); - list_del(&cq_object->cqlist_for_eq); - } - return BE_SUCCESS; -} - |