Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030251AbWHQUL4 (ORCPT ); Thu, 17 Aug 2006 16:11:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030267AbWHQULz (ORCPT ); Thu, 17 Aug 2006 16:11:55 -0400 Received: from sj-iport-3-in.cisco.com ([171.71.176.72]:24959 "EHLO sj-iport-3.cisco.com") by vger.kernel.org with ESMTP id S1030251AbWHQULE (ORCPT ); Thu, 17 Aug 2006 16:11:04 -0400 X-IronPort-AV: i="4.08,139,1154934000"; d="scan'208"; a="440920391:sNHT40019648" Cc: schihei@de.ibm.com, RAISCH@de.ibm.com, HNGUYEN@de.ibm.com, MEDER@de.ibm.com Subject: [PATCH 11/13] IB/ehca: ipz In-Reply-To: <20068171311.jebQ3TFd5jvynHCW@cisco.com> X-Mailer: Roland's Patchbomber Date: Thu, 17 Aug 2006 13:11:02 -0700 Message-Id: <20068171311.NYGfAW00YTmK6YKh@cisco.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII To: openib-general@openib.org, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org Content-Transfer-Encoding: 7BIT From: Roland Dreier X-OriginalArrivalTime: 17 Aug 2006 20:11:02.0467 (UTC) FILETIME=[434CD130:01C6C239] Authentication-Results: sj-dkim-3.cisco.com; header.From=rolandd@cisco.com; dkim=pass ( sig from cisco.com verified; ); Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 14511 Lines: 443 drivers/infiniband/hw/ehca/ipz_pt_fn.c | 166 +++++++++++++++++++++ drivers/infiniband/hw/ehca/ipz_pt_fn.h | 253 ++++++++++++++++++++++++++++++++ 2 files changed, 419 insertions(+), 0 deletions(-) diff --git a/drivers/infiniband/hw/ehca/ipz_pt_fn.c b/drivers/infiniband/hw/ehca/ipz_pt_fn.c new file mode 100644 index 0000000..a14f957 --- /dev/null +++ b/drivers/infiniband/hw/ehca/ipz_pt_fn.c @@ -0,0 +1,166 @@ +/* + * IBM eServer eHCA Infiniband device driver for Linux on POWER + * + * internal queue handling + * + * Authors: Waleri Fomin + * Reinhard Ernst + * Christoph Raisch + * + * Copyright (c) 2005 IBM Corporation + * + * This source code is distributed under a dual license of GPL v2.0 and OpenIB + * BSD. + * + * OpenIB BSD License + * + * Redistribution and use in source and binary forms, with or without + * modification, 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. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 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, WHETHER + * IN 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. + */ + +#define DEB_PREFIX "iptz" + +#include "ehca_tools.h" +#include "ipz_pt_fn.h" + +extern int ehca_hwlevel; + +void *ipz_qpageit_get_inc(struct ipz_queue *queue) +{ + void *ret = ipz_qeit_get(queue); + queue->current_q_offset += queue->pagesize; + if (queue->current_q_offset > queue->queue_length) { + queue->current_q_offset -= queue->pagesize; + ret = NULL; + } + if (((u64)ret) % EHCA_PAGESIZE) { + EDEB(4, "ERROR!! not at PAGE-Boundary"); + return NULL; + } + EDEB(7, "queue=%p ret=%p", queue, ret); + return ret; +} + +void *ipz_qeit_eq_get_inc(struct ipz_queue *queue) +{ + void *ret = ipz_qeit_get(queue); + u64 last_entry_in_q = queue->queue_length - queue->qe_size; + queue->current_q_offset += queue->qe_size; + if (queue->current_q_offset > last_entry_in_q) { + queue->current_q_offset = 0; + queue->toggle_state = (~queue->toggle_state) & 1; + } + + EDEB(7, "queue=%p ret=%p new current_q_offset=%lx qe_size=%x", + queue, ret, queue->current_q_offset, queue->qe_size); + + return ret; +} + +int ipz_queue_ctor(struct ipz_queue *queue, + const u32 nr_of_pages, + const u32 pagesize, const u32 qe_size, const u32 nr_of_sg) +{ + int pages_per_kpage = PAGE_SIZE >> EHCA_PAGESHIFT; + int f; + + EDEB_EN(7, "nr_of_pages=%x pagesize=%x qe_size=%x pages_per_kpage=%x", + nr_of_pages, pagesize, qe_size, pages_per_kpage); + if (pagesize > PAGE_SIZE) { + EDEB_ERR(4, "FATAL ERROR: pagesize=%x is greater than " + "kernel page size", pagesize); + return 0; + } + if (!pages_per_kpage) { + EDEB_ERR(4, "FATAL ERROR: invalid kernel page size. " + "pages_per_kpage=%x", pages_per_kpage); + return 0; + } + queue->queue_length = nr_of_pages * pagesize; + queue->queue_pages = vmalloc(nr_of_pages * sizeof(void *)); + if (!queue->queue_pages) { + EDEB(4, "ERROR!! didn't get the memory"); + return 0; + } + memset(queue->queue_pages, 0, nr_of_pages * sizeof(void *)); + /* + * allocate pages for queue: + * outer loop allocates whole kernel pages (page aligned) and + * inner loop divides a kernel page into smaller hca queue pages + */ + f = 0; + while (f < nr_of_pages) { + u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL); + int k; + if (!kpage) + goto ipz_queue_ctor_exit0; /*NOMEM*/ + for (k = 0; k < pages_per_kpage && f < nr_of_pages; k++) { + (queue->queue_pages)[f] = (struct ipz_page *)kpage; + kpage += EHCA_PAGESIZE; + f++; + } + } + + queue->current_q_offset = 0; + queue->qe_size = qe_size; + queue->act_nr_of_sg = nr_of_sg; + queue->pagesize = pagesize; + queue->toggle_state = 1; + EDEB_EX(7, "queue_length=%x queue_pages=%p qe_size=%x" + " act_nr_of_sg=%x", queue->queue_length, queue->queue_pages, + queue->qe_size, queue->act_nr_of_sg); + return 1; + + ipz_queue_ctor_exit0: + EDEB_ERR(4, "Couldn't get alloc pages queue=%p f=%x nr_of_pages=%x", + queue, f, nr_of_pages); + for (f = 0; f < nr_of_pages; f += pages_per_kpage) { + if (!(queue->queue_pages)[f]) + break; + free_page((unsigned long)(queue->queue_pages)[f]); + } + return 0; +} + +int ipz_queue_dtor(struct ipz_queue *queue) +{ + int pages_per_kpage = PAGE_SIZE >> EHCA_PAGESHIFT; + int g; + int nr_pages; + + EDEB_EN(7, "ipz_queue pointer=%p", queue); + if (!queue || !queue->queue_pages) { + EDEB_ERR(4, "queue or queue_pages is NULL"); + return 0; + } + EDEB(7, "destructing a queue with the following " + "properties:\n nr_of_pages=%x pagesize=%x qe_size=%x", + queue->act_nr_of_sg, queue->pagesize, queue->qe_size); + nr_pages = queue->queue_length / queue->pagesize; + for (g = 0; g < nr_pages; g += pages_per_kpage) + free_page((unsigned long)(queue->queue_pages)[g]); + vfree(queue->queue_pages); + + EDEB_EX(7, "queue freed!"); + return 1; +} diff --git a/drivers/infiniband/hw/ehca/ipz_pt_fn.h b/drivers/infiniband/hw/ehca/ipz_pt_fn.h new file mode 100644 index 0000000..fdd139b --- /dev/null +++ b/drivers/infiniband/hw/ehca/ipz_pt_fn.h @@ -0,0 +1,253 @@ +/* + * IBM eServer eHCA Infiniband device driver for Linux on POWER + * + * internal queue handling + * + * Authors: Waleri Fomin + * Reinhard Ernst + * Christoph Raisch + * + * Copyright (c) 2005 IBM Corporation + * + * All rights reserved. + * + * This source code is distributed under a dual license of GPL v2.0 and OpenIB + * BSD. + * + * OpenIB BSD License + * + * Redistribution and use in source and binary forms, with or without + * modification, 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. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 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, WHETHER + * IN 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. + */ + +#ifndef __IPZ_PT_FN_H__ +#define __IPZ_PT_FN_H__ + +#include "ehca_qes.h" +#define EHCA_PAGESHIFT 12 +#define EHCA_PAGESIZE 4096UL +#define EHCA_PAGEMASK (~(EHCA_PAGESIZE-1)) +#define EHCA_PT_ENTRIES 512UL + +#include "ehca_tools.h" +#include "ehca_qes.h" + +/* struct generic ehca page */ +struct ipz_page { + u8 entries[EHCA_PAGESIZE]; +}; + +/* struct generic queue in linux kernel virtual memory (kv) */ +struct ipz_queue { + u64 current_q_offset; /* current queue entry */ + + struct ipz_page **queue_pages; /* array of pages belonging to queue */ + u32 qe_size; /* queue entry size */ + u32 act_nr_of_sg; + u32 queue_length; /* queue length allocated in bytes */ + u32 pagesize; + u32 toggle_state; /* toggle flag - per page */ + u32 dummy3; /* 64 bit alignment */ +}; + +/* + * return current Queue Entry for a certain q_offset + * returns address (kv) of Queue Entry + */ +static inline void *ipz_qeit_calc(struct ipz_queue *queue, u64 q_offset) +{ + struct ipz_page *current_page = NULL; + if (q_offset >= queue->queue_length) + return NULL; + current_page = (queue->queue_pages)[q_offset >> EHCA_PAGESHIFT]; + return ¤t_page->entries[q_offset & (EHCA_PAGESIZE - 1)]; +} + +/* + * return current Queue Entry + * returns address (kv) of Queue Entry + */ +static inline void *ipz_qeit_get(struct ipz_queue *queue) +{ + return ipz_qeit_calc(queue, queue->current_q_offset); +} + +/* + * return current Queue Page , increment Queue Page iterator from + * page to page in struct ipz_queue, last increment will return 0! and + * NOT wrap + * returns address (kv) of Queue Page + * warning don't use in parallel with ipz_QE_get_inc() + */ +void *ipz_qpageit_get_inc(struct ipz_queue *queue); + +/* + * return current Queue Entry, increment Queue Entry iterator by one + * step in struct ipz_queue, will wrap in ringbuffer + * returns address (kv) of Queue Entry BEFORE increment + * warning don't use in parallel with ipz_qpageit_get_inc() + * warning unpredictable results may occur if steps>act_nr_of_queue_entries + */ +static inline void *ipz_qeit_get_inc(struct ipz_queue *queue) +{ + void *ret = ipz_qeit_get(queue); + queue->current_q_offset += queue->qe_size; + if (queue->current_q_offset >= queue->queue_length) { + queue->current_q_offset = 0; + /* toggle the valid flag */ + queue->toggle_state = (~queue->toggle_state) & 1; + } + + EDEB(7, "queue=%p ret=%p new current_q_addr=%lx qe_size=%x", + queue, ret, queue->current_q_offset, queue->qe_size); + + return ret; +} + +/* + * return current Queue Entry, increment Queue Entry iterator by one + * step in struct ipz_queue, will wrap in ringbuffer + * returns address (kv) of Queue Entry BEFORE increment + * returns 0 and does not increment, if wrong valid state + * warning don't use in parallel with ipz_qpageit_get_inc() + * warning unpredictable results may occur if steps>act_nr_of_queue_entries + */ +static inline void *ipz_qeit_get_inc_valid(struct ipz_queue *queue) +{ + struct ehca_cqe *cqe = ipz_qeit_get(queue); + u32 cqe_flags = cqe->cqe_flags; + + if ((cqe_flags >> 7) != (queue->toggle_state & 1)) + return NULL; + + ipz_qeit_get_inc(queue); + return cqe; +} + +/* + * returns and resets Queue Entry iterator + * returns address (kv) of first Queue Entry + */ +static inline void *ipz_qeit_reset(struct ipz_queue *queue) +{ + queue->current_q_offset = 0; + return ipz_qeit_get(queue); +} + +/* struct generic page table */ +struct ipz_pt { + u64 entries[EHCA_PT_ENTRIES]; +}; + +/* struct page table for a queue, only to be used in pf */ +struct ipz_qpt { + /* queue page tables (kv), use u64 because we know the element length */ + u64 *qpts; + u32 n_qpts; + u32 n_ptes; /* number of page table entries */ + u64 *current_pte_addr; +}; + +/* + * constructor for a ipz_queue_t, placement new for ipz_queue_t, + * new for all dependent datastructors + * all QP Tables are the same + * flow: + * allocate+pin queue + * see ipz_qpt_ctor() + * returns true if ok, false if out of memory + */ +int ipz_queue_ctor(struct ipz_queue *queue, const u32 nr_of_pages, + const u32 pagesize, const u32 qe_size, + const u32 nr_of_sg); + +/* + * destructor for a ipz_queue_t + * -# free queue + * see ipz_queue_ctor() + * returns true if ok, false if queue was NULL-ptr of free failed + */ +int ipz_queue_dtor(struct ipz_queue *queue); + +/* + * constructor for a ipz_qpt_t, + * placement new for struct ipz_queue, new for all dependent datastructors + * all QP Tables are the same, + * flow: + * -# allocate+pin queue + * -# initialise ptcb + * -# allocate+pin PTs + * -# link PTs to a ring, according to HCA Arch, set bit62 id needed + * -# the ring must have room for exactly nr_of_PTEs + * see ipz_qpt_ctor() + */ +void ipz_qpt_ctor(struct ipz_qpt *qpt, + const u32 nr_of_qes, + const u32 pagesize, + const u32 qe_size, + const u8 lowbyte, const u8 toggle, + u32 * act_nr_of_QEs, u32 * act_nr_of_pages); + +/* + * return current Queue Entry, increment Queue Entry iterator by one + * step in struct ipz_queue, will wrap in ringbuffer + * returns address (kv) of Queue Entry BEFORE increment + * warning don't use in parallel with ipz_qpageit_get_inc() + * warning unpredictable results may occur if steps>act_nr_of_queue_entries + * fix EQ page problems + */ +void *ipz_qeit_eq_get_inc(struct ipz_queue *queue); + +/* + * return current Event Queue Entry, increment Queue Entry iterator + * by one step in struct ipz_queue if valid, will wrap in ringbuffer + * returns address (kv) of Queue Entry BEFORE increment + * returns 0 and does not increment, if wrong valid state + * warning don't use in parallel with ipz_queue_QPageit_get_inc() + * warning unpredictable results may occur if steps>act_nr_of_queue_entries + */ +static inline void *ipz_eqit_eq_get_inc_valid(struct ipz_queue *queue) +{ + void *ret = ipz_qeit_get(queue); + u32 qe = *(u8 *) ret; + EDEB(7, "ipz_QEit_EQ_get_inc_valid qe=%x", qe); + if ((qe >> 7) == (queue->toggle_state & 1)) + ipz_qeit_eq_get_inc(queue); /* this is a good one */ + else + ret = NULL; + return ret; +} + +/* returns address (GX) of first queue entry */ +static inline u64 ipz_qpt_get_firstpage(struct ipz_qpt *qpt) +{ + return be64_to_cpu(qpt->qpts[0]); +} + +/* returns address (kv) of first page of queue page table */ +static inline void *ipz_qpt_get_qpt(struct ipz_qpt *qpt) +{ + return qpt->qpts; +} + +#endif /* __IPZ_PT_FN_H__ */ -- 1.4.1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/