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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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[SCSI] cxgb3i: change cxgb3i to use libcxgbi
Signed-off-by: Karen Xie <kxie@chelsio.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
kxie@chelsio.com
James Bottomley
parent
7b36b6e03b
commit
6f7efaabef
@ -378,7 +378,6 @@ config ISCSI_BOOT_SYSFS
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via sysfs to userspace. If you wish to export this information,
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via sysfs to userspace. If you wish to export this information,
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say Y. Otherwise, say N.
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say Y. Otherwise, say N.
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source "drivers/scsi/cxgb3i/Kconfig"
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source "drivers/scsi/cxgbi/Kconfig"
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source "drivers/scsi/cxgbi/Kconfig"
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source "drivers/scsi/bnx2i/Kconfig"
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source "drivers/scsi/bnx2i/Kconfig"
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source "drivers/scsi/be2iscsi/Kconfig"
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source "drivers/scsi/be2iscsi/Kconfig"
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@ -133,7 +133,7 @@ obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o
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obj-$(CONFIG_SCSI_STEX) += stex.o
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obj-$(CONFIG_SCSI_STEX) += stex.o
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obj-$(CONFIG_SCSI_MVSAS) += mvsas/
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obj-$(CONFIG_SCSI_MVSAS) += mvsas/
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obj-$(CONFIG_PS3_ROM) += ps3rom.o
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obj-$(CONFIG_PS3_ROM) += ps3rom.o
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obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgb3i/
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obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/
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obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/
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obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/
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obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/
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obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/
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obj-$(CONFIG_BE2ISCSI) += libiscsi.o be2iscsi/
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obj-$(CONFIG_BE2ISCSI) += libiscsi.o be2iscsi/
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@ -1,161 +0,0 @@
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/*
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* cxgb3i.h: Chelsio S3xx iSCSI driver.
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*
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* Copyright (c) 2008 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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* Written by: Karen Xie (kxie@chelsio.com)
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*/
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#ifndef __CXGB3I_H__
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#define __CXGB3I_H__
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/scatterlist.h>
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#include <linux/skbuff.h>
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#include <scsi/libiscsi_tcp.h>
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/* from cxgb3 LLD */
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#include "common.h"
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#include "t3_cpl.h"
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#include "t3cdev.h"
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#include "cxgb3_ctl_defs.h"
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#include "cxgb3_offload.h"
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#include "firmware_exports.h"
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#include "cxgb3i_offload.h"
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#include "cxgb3i_ddp.h"
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#define CXGB3I_SCSI_HOST_QDEPTH 1024
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#define CXGB3I_MAX_TARGET CXGB3I_MAX_CONN
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#define CXGB3I_MAX_LUN 512
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#define ISCSI_PDU_NONPAYLOAD_MAX \
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(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE)
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struct cxgb3i_adapter;
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struct cxgb3i_hba;
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struct cxgb3i_endpoint;
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/**
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* struct cxgb3i_hba - cxgb3i iscsi structure (per port)
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*
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* @snic: cxgb3i adapter containing this port
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* @ndev: pointer to netdev structure
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* @shost: pointer to scsi host structure
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*/
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struct cxgb3i_hba {
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struct cxgb3i_adapter *snic;
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struct net_device *ndev;
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struct Scsi_Host *shost;
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};
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/**
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* struct cxgb3i_adapter - cxgb3i adapter structure (per pci)
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*
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* @listhead: list head to link elements
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* @lock: lock for this structure
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* @tdev: pointer to t3cdev used by cxgb3 driver
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* @pdev: pointer to pci dev
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* @hba_cnt: # of hbas (the same as # of ports)
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* @hba: all the hbas on this adapter
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* @flags: bit flag for adapter event/status
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* @tx_max_size: max. tx packet size supported
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* @rx_max_size: max. rx packet size supported
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* @tag_format: ddp tag format settings
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*/
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#define CXGB3I_ADAPTER_FLAG_RESET 0x1
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struct cxgb3i_adapter {
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struct list_head list_head;
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spinlock_t lock;
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struct t3cdev *tdev;
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struct pci_dev *pdev;
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unsigned char hba_cnt;
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struct cxgb3i_hba *hba[MAX_NPORTS];
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unsigned int flags;
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unsigned int tx_max_size;
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unsigned int rx_max_size;
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struct cxgb3i_tag_format tag_format;
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};
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/**
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* struct cxgb3i_conn - cxgb3i iscsi connection
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*
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* @listhead: list head to link elements
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* @cep: pointer to iscsi_endpoint structure
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* @conn: pointer to iscsi_conn structure
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* @hba: pointer to the hba this conn. is going through
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* @task_idx_bits: # of bits needed for session->cmds_max
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*/
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struct cxgb3i_conn {
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struct list_head list_head;
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struct cxgb3i_endpoint *cep;
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struct iscsi_conn *conn;
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struct cxgb3i_hba *hba;
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unsigned int task_idx_bits;
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};
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/**
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* struct cxgb3i_endpoint - iscsi tcp endpoint
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*
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* @c3cn: the h/w tcp connection representation
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* @hba: pointer to the hba this conn. is going through
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* @cconn: pointer to the associated cxgb3i iscsi connection
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*/
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struct cxgb3i_endpoint {
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struct s3_conn *c3cn;
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struct cxgb3i_hba *hba;
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struct cxgb3i_conn *cconn;
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};
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/**
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* struct cxgb3i_task_data - private iscsi task data
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*
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* @nr_frags: # of coalesced page frags (from scsi sgl)
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* @frags: coalesced page frags (from scsi sgl)
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* @skb: tx pdu skb
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* @offset: data offset for the next pdu
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* @count: max. possible pdu payload
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* @sgoffset: offset to the first sg entry for a given offset
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*/
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#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
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struct cxgb3i_task_data {
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unsigned short nr_frags;
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skb_frag_t frags[MAX_PDU_FRAGS];
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struct sk_buff *skb;
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unsigned int offset;
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unsigned int count;
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unsigned int sgoffset;
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};
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int cxgb3i_iscsi_init(void);
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void cxgb3i_iscsi_cleanup(void);
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struct cxgb3i_adapter *cxgb3i_adapter_find_by_tdev(struct t3cdev *);
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void cxgb3i_adapter_open(struct t3cdev *);
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void cxgb3i_adapter_close(struct t3cdev *);
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struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *,
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struct net_device *);
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void cxgb3i_hba_host_remove(struct cxgb3i_hba *);
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int cxgb3i_pdu_init(void);
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void cxgb3i_pdu_cleanup(void);
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void cxgb3i_conn_cleanup_task(struct iscsi_task *);
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int cxgb3i_conn_alloc_pdu(struct iscsi_task *, u8);
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int cxgb3i_conn_init_pdu(struct iscsi_task *, unsigned int, unsigned int);
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int cxgb3i_conn_xmit_pdu(struct iscsi_task *);
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void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt);
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int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt);
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#endif
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@ -1,773 +0,0 @@
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/*
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* cxgb3i_ddp.c: Chelsio S3xx iSCSI DDP Manager.
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*
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* Copyright (c) 2008 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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* Written by: Karen Xie (kxie@chelsio.com)
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*/
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/scatterlist.h>
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/* from cxgb3 LLD */
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#include "common.h"
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#include "t3_cpl.h"
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#include "t3cdev.h"
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#include "cxgb3_ctl_defs.h"
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#include "cxgb3_offload.h"
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#include "firmware_exports.h"
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#include "cxgb3i_ddp.h"
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#define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt)
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#define ddp_log_warn(fmt...) printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt)
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#define ddp_log_info(fmt...) printk(KERN_INFO "cxgb3i_ddp: " fmt)
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#ifdef __DEBUG_CXGB3I_DDP__
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#define ddp_log_debug(fmt, args...) \
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printk(KERN_INFO "cxgb3i_ddp: %s - " fmt, __func__ , ## args)
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#else
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#define ddp_log_debug(fmt...)
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#endif
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/*
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* iSCSI Direct Data Placement
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*
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* T3 h/w can directly place the iSCSI Data-In or Data-Out PDU's payload into
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* pre-posted final destination host-memory buffers based on the Initiator
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* Task Tag (ITT) in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
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*
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* The host memory address is programmed into h/w in the format of pagepod
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* entries.
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* The location of the pagepod entry is encoded into ddp tag which is used or
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* is the base for ITT/TTT.
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*/
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#define DDP_PGIDX_MAX 4
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#define DDP_THRESHOLD 2048
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static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4};
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static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
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static unsigned char page_idx = DDP_PGIDX_MAX;
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/*
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* functions to program the pagepod in h/w
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*/
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static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
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{
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struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head;
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req->wr.wr_lo = 0;
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS));
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req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) |
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V_ULPTX_CMD(ULP_MEM_WRITE));
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req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) |
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V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1));
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}
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static int set_ddp_map(struct cxgb3i_ddp_info *ddp, struct pagepod_hdr *hdr,
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unsigned int idx, unsigned int npods,
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struct cxgb3i_gather_list *gl)
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{
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unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
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int i;
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for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
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struct sk_buff *skb = ddp->gl_skb[idx];
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struct pagepod *ppod;
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int j, pidx;
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/* hold on to the skb until we clear the ddp mapping */
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skb_get(skb);
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ulp_mem_io_set_hdr(skb, pm_addr);
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ppod = (struct pagepod *)
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(skb->head + sizeof(struct ulp_mem_io));
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memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod));
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for (pidx = 4 * i, j = 0; j < 5; ++j, ++pidx)
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ppod->addr[j] = pidx < gl->nelem ?
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cpu_to_be64(gl->phys_addr[pidx]) : 0UL;
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skb->priority = CPL_PRIORITY_CONTROL;
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cxgb3_ofld_send(ddp->tdev, skb);
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}
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return 0;
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}
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static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag,
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unsigned int idx, unsigned int npods)
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{
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unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
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int i;
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for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
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struct sk_buff *skb = ddp->gl_skb[idx];
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if (!skb) {
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ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n",
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tag, idx, i, npods);
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continue;
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}
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ddp->gl_skb[idx] = NULL;
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memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE);
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ulp_mem_io_set_hdr(skb, pm_addr);
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skb->priority = CPL_PRIORITY_CONTROL;
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cxgb3_ofld_send(ddp->tdev, skb);
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}
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}
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static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp,
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unsigned int start, unsigned int max,
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unsigned int count,
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struct cxgb3i_gather_list *gl)
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{
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unsigned int i, j, k;
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/* not enough entries */
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if ((max - start) < count)
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return -EBUSY;
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max -= count;
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spin_lock(&ddp->map_lock);
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for (i = start; i < max;) {
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for (j = 0, k = i; j < count; j++, k++) {
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if (ddp->gl_map[k])
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break;
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}
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if (j == count) {
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for (j = 0, k = i; j < count; j++, k++)
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ddp->gl_map[k] = gl;
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spin_unlock(&ddp->map_lock);
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return i;
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}
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i += j + 1;
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}
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spin_unlock(&ddp->map_lock);
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return -EBUSY;
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}
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static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp,
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int start, int count)
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{
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spin_lock(&ddp->map_lock);
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memset(&ddp->gl_map[start], 0,
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|
||||||
count * sizeof(struct cxgb3i_gather_list *));
|
|
||||||
spin_unlock(&ddp->map_lock);
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline void ddp_free_gl_skb(struct cxgb3i_ddp_info *ddp,
|
|
||||||
int idx, int count)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
|
|
||||||
for (i = 0; i < count; i++, idx++)
|
|
||||||
if (ddp->gl_skb[idx]) {
|
|
||||||
kfree_skb(ddp->gl_skb[idx]);
|
|
||||||
ddp->gl_skb[idx] = NULL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline int ddp_alloc_gl_skb(struct cxgb3i_ddp_info *ddp, int idx,
|
|
||||||
int count, gfp_t gfp)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
|
|
||||||
for (i = 0; i < count; i++) {
|
|
||||||
struct sk_buff *skb = alloc_skb(sizeof(struct ulp_mem_io) +
|
|
||||||
PPOD_SIZE, gfp);
|
|
||||||
if (skb) {
|
|
||||||
ddp->gl_skb[idx + i] = skb;
|
|
||||||
skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE);
|
|
||||||
} else {
|
|
||||||
ddp_free_gl_skb(ddp, idx, i);
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_find_page_index - return ddp page index for a given page size
|
|
||||||
* @pgsz: page size
|
|
||||||
* return the ddp page index, if no match is found return DDP_PGIDX_MAX.
|
|
||||||
*/
|
|
||||||
int cxgb3i_ddp_find_page_index(unsigned long pgsz)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
|
|
||||||
for (i = 0; i < DDP_PGIDX_MAX; i++) {
|
|
||||||
if (pgsz == (1UL << ddp_page_shift[i]))
|
|
||||||
return i;
|
|
||||||
}
|
|
||||||
ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz);
|
|
||||||
return DDP_PGIDX_MAX;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_adjust_page_table - adjust page table with PAGE_SIZE
|
|
||||||
* return the ddp page index, if no match is found return DDP_PGIDX_MAX.
|
|
||||||
*/
|
|
||||||
int cxgb3i_ddp_adjust_page_table(void)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
unsigned int base_order, order;
|
|
||||||
|
|
||||||
if (PAGE_SIZE < (1UL << ddp_page_shift[0])) {
|
|
||||||
ddp_log_info("PAGE_SIZE 0x%lx too small, min. 0x%lx.\n",
|
|
||||||
PAGE_SIZE, 1UL << ddp_page_shift[0]);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
base_order = get_order(1UL << ddp_page_shift[0]);
|
|
||||||
order = get_order(1 << PAGE_SHIFT);
|
|
||||||
for (i = 0; i < DDP_PGIDX_MAX; i++) {
|
|
||||||
/* first is the kernel page size, then just doubling the size */
|
|
||||||
ddp_page_order[i] = order - base_order + i;
|
|
||||||
ddp_page_shift[i] = PAGE_SHIFT + i;
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline void ddp_gl_unmap(struct pci_dev *pdev,
|
|
||||||
struct cxgb3i_gather_list *gl)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
|
|
||||||
for (i = 0; i < gl->nelem; i++)
|
|
||||||
pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE,
|
|
||||||
PCI_DMA_FROMDEVICE);
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline int ddp_gl_map(struct pci_dev *pdev,
|
|
||||||
struct cxgb3i_gather_list *gl)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
|
|
||||||
for (i = 0; i < gl->nelem; i++) {
|
|
||||||
gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0,
|
|
||||||
PAGE_SIZE,
|
|
||||||
PCI_DMA_FROMDEVICE);
|
|
||||||
if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i])))
|
|
||||||
goto unmap;
|
|
||||||
}
|
|
||||||
|
|
||||||
return i;
|
|
||||||
|
|
||||||
unmap:
|
|
||||||
if (i) {
|
|
||||||
unsigned int nelem = gl->nelem;
|
|
||||||
|
|
||||||
gl->nelem = i;
|
|
||||||
ddp_gl_unmap(pdev, gl);
|
|
||||||
gl->nelem = nelem;
|
|
||||||
}
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_make_gl - build ddp page buffer list
|
|
||||||
* @xferlen: total buffer length
|
|
||||||
* @sgl: page buffer scatter-gather list
|
|
||||||
* @sgcnt: # of page buffers
|
|
||||||
* @pdev: pci_dev, used for pci map
|
|
||||||
* @gfp: allocation mode
|
|
||||||
*
|
|
||||||
* construct a ddp page buffer list from the scsi scattergather list.
|
|
||||||
* coalesce buffers as much as possible, and obtain dma addresses for
|
|
||||||
* each page.
|
|
||||||
*
|
|
||||||
* Return the cxgb3i_gather_list constructed from the page buffers if the
|
|
||||||
* memory can be used for ddp. Return NULL otherwise.
|
|
||||||
*/
|
|
||||||
struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen,
|
|
||||||
struct scatterlist *sgl,
|
|
||||||
unsigned int sgcnt,
|
|
||||||
struct pci_dev *pdev,
|
|
||||||
gfp_t gfp)
|
|
||||||
{
|
|
||||||
struct cxgb3i_gather_list *gl;
|
|
||||||
struct scatterlist *sg = sgl;
|
|
||||||
struct page *sgpage = sg_page(sg);
|
|
||||||
unsigned int sglen = sg->length;
|
|
||||||
unsigned int sgoffset = sg->offset;
|
|
||||||
unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >>
|
|
||||||
PAGE_SHIFT;
|
|
||||||
int i = 1, j = 0;
|
|
||||||
|
|
||||||
if (xferlen < DDP_THRESHOLD) {
|
|
||||||
ddp_log_debug("xfer %u < threshold %u, no ddp.\n",
|
|
||||||
xferlen, DDP_THRESHOLD);
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
gl = kzalloc(sizeof(struct cxgb3i_gather_list) +
|
|
||||||
npages * (sizeof(dma_addr_t) + sizeof(struct page *)),
|
|
||||||
gfp);
|
|
||||||
if (!gl)
|
|
||||||
return NULL;
|
|
||||||
|
|
||||||
gl->pages = (struct page **)&gl->phys_addr[npages];
|
|
||||||
gl->length = xferlen;
|
|
||||||
gl->offset = sgoffset;
|
|
||||||
gl->pages[0] = sgpage;
|
|
||||||
|
|
||||||
sg = sg_next(sg);
|
|
||||||
while (sg) {
|
|
||||||
struct page *page = sg_page(sg);
|
|
||||||
|
|
||||||
if (sgpage == page && sg->offset == sgoffset + sglen)
|
|
||||||
sglen += sg->length;
|
|
||||||
else {
|
|
||||||
/* make sure the sgl is fit for ddp:
|
|
||||||
* each has the same page size, and
|
|
||||||
* all of the middle pages are used completely
|
|
||||||
*/
|
|
||||||
if ((j && sgoffset) ||
|
|
||||||
((i != sgcnt - 1) &&
|
|
||||||
((sglen + sgoffset) & ~PAGE_MASK)))
|
|
||||||
goto error_out;
|
|
||||||
|
|
||||||
j++;
|
|
||||||
if (j == gl->nelem || sg->offset)
|
|
||||||
goto error_out;
|
|
||||||
gl->pages[j] = page;
|
|
||||||
sglen = sg->length;
|
|
||||||
sgoffset = sg->offset;
|
|
||||||
sgpage = page;
|
|
||||||
}
|
|
||||||
i++;
|
|
||||||
sg = sg_next(sg);
|
|
||||||
}
|
|
||||||
gl->nelem = ++j;
|
|
||||||
|
|
||||||
if (ddp_gl_map(pdev, gl) < 0)
|
|
||||||
goto error_out;
|
|
||||||
|
|
||||||
return gl;
|
|
||||||
|
|
||||||
error_out:
|
|
||||||
kfree(gl);
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_release_gl - release a page buffer list
|
|
||||||
* @gl: a ddp page buffer list
|
|
||||||
* @pdev: pci_dev used for pci_unmap
|
|
||||||
* free a ddp page buffer list resulted from cxgb3i_ddp_make_gl().
|
|
||||||
*/
|
|
||||||
void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl,
|
|
||||||
struct pci_dev *pdev)
|
|
||||||
{
|
|
||||||
ddp_gl_unmap(pdev, gl);
|
|
||||||
kfree(gl);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_tag_reserve - set up ddp for a data transfer
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tid: connection id
|
|
||||||
* @tformat: tag format
|
|
||||||
* @tagp: contains s/w tag initially, will be updated with ddp/hw tag
|
|
||||||
* @gl: the page momory list
|
|
||||||
* @gfp: allocation mode
|
|
||||||
*
|
|
||||||
* ddp setup for a given page buffer list and construct the ddp tag.
|
|
||||||
* return 0 if success, < 0 otherwise.
|
|
||||||
*/
|
|
||||||
int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid,
|
|
||||||
struct cxgb3i_tag_format *tformat, u32 *tagp,
|
|
||||||
struct cxgb3i_gather_list *gl, gfp_t gfp)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi;
|
|
||||||
struct pagepod_hdr hdr;
|
|
||||||
unsigned int npods;
|
|
||||||
int idx = -1;
|
|
||||||
int err = -ENOMEM;
|
|
||||||
u32 sw_tag = *tagp;
|
|
||||||
u32 tag;
|
|
||||||
|
|
||||||
if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem ||
|
|
||||||
gl->length < DDP_THRESHOLD) {
|
|
||||||
ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n",
|
|
||||||
page_idx, gl->length, DDP_THRESHOLD);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
|
|
||||||
|
|
||||||
if (ddp->idx_last == ddp->nppods)
|
|
||||||
idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl);
|
|
||||||
else {
|
|
||||||
idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
|
|
||||||
ddp->nppods, npods, gl);
|
|
||||||
if (idx < 0 && ddp->idx_last >= npods) {
|
|
||||||
idx = ddp_find_unused_entries(ddp, 0,
|
|
||||||
min(ddp->idx_last + npods, ddp->nppods),
|
|
||||||
npods, gl);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (idx < 0) {
|
|
||||||
ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n",
|
|
||||||
gl->length, gl->nelem, npods);
|
|
||||||
return idx;
|
|
||||||
}
|
|
||||||
|
|
||||||
err = ddp_alloc_gl_skb(ddp, idx, npods, gfp);
|
|
||||||
if (err < 0)
|
|
||||||
goto unmark_entries;
|
|
||||||
|
|
||||||
tag = cxgb3i_ddp_tag_base(tformat, sw_tag);
|
|
||||||
tag |= idx << PPOD_IDX_SHIFT;
|
|
||||||
|
|
||||||
hdr.rsvd = 0;
|
|
||||||
hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid));
|
|
||||||
hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask);
|
|
||||||
hdr.maxoffset = htonl(gl->length);
|
|
||||||
hdr.pgoffset = htonl(gl->offset);
|
|
||||||
|
|
||||||
err = set_ddp_map(ddp, &hdr, idx, npods, gl);
|
|
||||||
if (err < 0)
|
|
||||||
goto free_gl_skb;
|
|
||||||
|
|
||||||
ddp->idx_last = idx;
|
|
||||||
ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n",
|
|
||||||
gl->length, gl->nelem, gl->offset, tid, sw_tag, tag,
|
|
||||||
idx, npods);
|
|
||||||
*tagp = tag;
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
free_gl_skb:
|
|
||||||
ddp_free_gl_skb(ddp, idx, npods);
|
|
||||||
unmark_entries:
|
|
||||||
ddp_unmark_entries(ddp, idx, npods);
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_tag_release - release a ddp tag
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tag: ddp tag
|
|
||||||
* ddp cleanup for a given ddp tag and release all the resources held
|
|
||||||
*/
|
|
||||||
void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi;
|
|
||||||
u32 idx;
|
|
||||||
|
|
||||||
if (!ddp) {
|
|
||||||
ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask;
|
|
||||||
if (idx < ddp->nppods) {
|
|
||||||
struct cxgb3i_gather_list *gl = ddp->gl_map[idx];
|
|
||||||
unsigned int npods;
|
|
||||||
|
|
||||||
if (!gl || !gl->nelem) {
|
|
||||||
ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n",
|
|
||||||
tag, idx, gl, gl ? gl->nelem : 0);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
|
|
||||||
ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n",
|
|
||||||
tag, idx, npods);
|
|
||||||
clear_ddp_map(ddp, tag, idx, npods);
|
|
||||||
ddp_unmark_entries(ddp, idx, npods);
|
|
||||||
cxgb3i_ddp_release_gl(gl, ddp->pdev);
|
|
||||||
} else
|
|
||||||
ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n",
|
|
||||||
tag, idx, ddp->nppods);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx,
|
|
||||||
int reply)
|
|
||||||
{
|
|
||||||
struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field),
|
|
||||||
GFP_KERNEL);
|
|
||||||
struct cpl_set_tcb_field *req;
|
|
||||||
u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0;
|
|
||||||
|
|
||||||
if (!skb)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
/* set up ulp submode and page size */
|
|
||||||
req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
|
|
||||||
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
||||||
req->wr.wr_lo = 0;
|
|
||||||
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
|
|
||||||
req->reply = V_NO_REPLY(reply ? 0 : 1);
|
|
||||||
req->cpu_idx = 0;
|
|
||||||
req->word = htons(31);
|
|
||||||
req->mask = cpu_to_be64(0xF0000000);
|
|
||||||
req->val = cpu_to_be64(val << 28);
|
|
||||||
skb->priority = CPL_PRIORITY_CONTROL;
|
|
||||||
|
|
||||||
cxgb3_ofld_send(tdev, skb);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tid: connection id
|
|
||||||
* @reply: request reply from h/w
|
|
||||||
* set up the ddp page size based on the host PAGE_SIZE for a connection
|
|
||||||
* identified by tid
|
|
||||||
*/
|
|
||||||
int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid,
|
|
||||||
int reply)
|
|
||||||
{
|
|
||||||
return setup_conn_pgidx(tdev, tid, page_idx, reply);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tid: connection id
|
|
||||||
* @reply: request reply from h/w
|
|
||||||
* @pgsz: ddp page size
|
|
||||||
* set up the ddp page size for a connection identified by tid
|
|
||||||
*/
|
|
||||||
int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid,
|
|
||||||
int reply, unsigned long pgsz)
|
|
||||||
{
|
|
||||||
int pgidx = cxgb3i_ddp_find_page_index(pgsz);
|
|
||||||
|
|
||||||
return setup_conn_pgidx(tdev, tid, pgidx, reply);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_setup_conn_digest - setup conn. digest setting
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tid: connection id
|
|
||||||
* @hcrc: header digest enabled
|
|
||||||
* @dcrc: data digest enabled
|
|
||||||
* @reply: request reply from h/w
|
|
||||||
* set up the iscsi digest settings for a connection identified by tid
|
|
||||||
*/
|
|
||||||
int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid,
|
|
||||||
int hcrc, int dcrc, int reply)
|
|
||||||
{
|
|
||||||
struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field),
|
|
||||||
GFP_KERNEL);
|
|
||||||
struct cpl_set_tcb_field *req;
|
|
||||||
u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0);
|
|
||||||
|
|
||||||
if (!skb)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
/* set up ulp submode and page size */
|
|
||||||
req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
|
|
||||||
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
||||||
req->wr.wr_lo = 0;
|
|
||||||
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
|
|
||||||
req->reply = V_NO_REPLY(reply ? 0 : 1);
|
|
||||||
req->cpu_idx = 0;
|
|
||||||
req->word = htons(31);
|
|
||||||
req->mask = cpu_to_be64(0x0F000000);
|
|
||||||
req->val = cpu_to_be64(val << 24);
|
|
||||||
skb->priority = CPL_PRIORITY_CONTROL;
|
|
||||||
|
|
||||||
cxgb3_ofld_send(tdev, skb);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_adapter_ddp_info - read the adapter's ddp information
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* @tformat: tag format
|
|
||||||
* @txsz: max tx pdu payload size, filled in by this func.
|
|
||||||
* @rxsz: max rx pdu payload size, filled in by this func.
|
|
||||||
* setup the tag format for a given iscsi entity
|
|
||||||
*/
|
|
||||||
int cxgb3i_adapter_ddp_info(struct t3cdev *tdev,
|
|
||||||
struct cxgb3i_tag_format *tformat,
|
|
||||||
unsigned int *txsz, unsigned int *rxsz)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp;
|
|
||||||
unsigned char idx_bits;
|
|
||||||
|
|
||||||
if (!tformat)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
if (!tdev->ulp_iscsi)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
|
|
||||||
|
|
||||||
idx_bits = 32 - tformat->sw_bits;
|
|
||||||
tformat->rsvd_bits = ddp->idx_bits;
|
|
||||||
tformat->rsvd_shift = PPOD_IDX_SHIFT;
|
|
||||||
tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1;
|
|
||||||
|
|
||||||
ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n",
|
|
||||||
tformat->sw_bits, tformat->rsvd_bits,
|
|
||||||
tformat->rsvd_shift, tformat->rsvd_mask);
|
|
||||||
|
|
||||||
*txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
|
|
||||||
ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
|
|
||||||
*rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
|
|
||||||
ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
|
|
||||||
ddp_log_info("max payload size: %u/%u, %u/%u.\n",
|
|
||||||
*txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* release all the resource held by the ddp pagepod manager for a given
|
|
||||||
* adapter if needed
|
|
||||||
*/
|
|
||||||
|
|
||||||
static void ddp_cleanup(struct kref *kref)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp = container_of(kref,
|
|
||||||
struct cxgb3i_ddp_info,
|
|
||||||
refcnt);
|
|
||||||
int i = 0;
|
|
||||||
|
|
||||||
ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev);
|
|
||||||
|
|
||||||
ddp->tdev->ulp_iscsi = NULL;
|
|
||||||
while (i < ddp->nppods) {
|
|
||||||
struct cxgb3i_gather_list *gl = ddp->gl_map[i];
|
|
||||||
if (gl) {
|
|
||||||
int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
|
|
||||||
>> PPOD_PAGES_SHIFT;
|
|
||||||
ddp_log_info("t3dev 0x%p, ddp %d + %d.\n",
|
|
||||||
ddp->tdev, i, npods);
|
|
||||||
kfree(gl);
|
|
||||||
ddp_free_gl_skb(ddp, i, npods);
|
|
||||||
i += npods;
|
|
||||||
} else
|
|
||||||
i++;
|
|
||||||
}
|
|
||||||
cxgb3i_free_big_mem(ddp);
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_ddp_cleanup(struct t3cdev *tdev)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
|
|
||||||
|
|
||||||
ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp);
|
|
||||||
if (ddp)
|
|
||||||
kref_put(&ddp->refcnt, ddp_cleanup);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* ddp_init - initialize the cxgb3 adapter's ddp resource
|
|
||||||
* @tdev: t3cdev adapter
|
|
||||||
* initialize the ddp pagepod manager for a given adapter
|
|
||||||
*/
|
|
||||||
static void ddp_init(struct t3cdev *tdev)
|
|
||||||
{
|
|
||||||
struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi;
|
|
||||||
struct ulp_iscsi_info uinfo;
|
|
||||||
unsigned int ppmax, bits;
|
|
||||||
int i, err;
|
|
||||||
|
|
||||||
if (ddp) {
|
|
||||||
kref_get(&ddp->refcnt);
|
|
||||||
ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n",
|
|
||||||
tdev, tdev->ulp_iscsi);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
|
|
||||||
if (err < 0) {
|
|
||||||
ddp_log_error("%s, failed to get iscsi param err=%d.\n",
|
|
||||||
tdev->name, err);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT;
|
|
||||||
bits = __ilog2_u32(ppmax) + 1;
|
|
||||||
if (bits > PPOD_IDX_MAX_SIZE)
|
|
||||||
bits = PPOD_IDX_MAX_SIZE;
|
|
||||||
ppmax = (1 << (bits - 1)) - 1;
|
|
||||||
|
|
||||||
ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) +
|
|
||||||
ppmax *
|
|
||||||
(sizeof(struct cxgb3i_gather_list *) +
|
|
||||||
sizeof(struct sk_buff *)),
|
|
||||||
GFP_KERNEL);
|
|
||||||
if (!ddp) {
|
|
||||||
ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n",
|
|
||||||
tdev->name, ppmax);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1);
|
|
||||||
ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) +
|
|
||||||
ppmax *
|
|
||||||
sizeof(struct cxgb3i_gather_list *));
|
|
||||||
spin_lock_init(&ddp->map_lock);
|
|
||||||
kref_init(&ddp->refcnt);
|
|
||||||
|
|
||||||
ddp->tdev = tdev;
|
|
||||||
ddp->pdev = uinfo.pdev;
|
|
||||||
ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE);
|
|
||||||
ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE);
|
|
||||||
ddp->llimit = uinfo.llimit;
|
|
||||||
ddp->ulimit = uinfo.ulimit;
|
|
||||||
ddp->nppods = ppmax;
|
|
||||||
ddp->idx_last = ppmax;
|
|
||||||
ddp->idx_bits = bits;
|
|
||||||
ddp->idx_mask = (1 << bits) - 1;
|
|
||||||
ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1;
|
|
||||||
|
|
||||||
uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
|
|
||||||
for (i = 0; i < DDP_PGIDX_MAX; i++)
|
|
||||||
uinfo.pgsz_factor[i] = ddp_page_order[i];
|
|
||||||
uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT);
|
|
||||||
|
|
||||||
err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo);
|
|
||||||
if (err < 0) {
|
|
||||||
ddp_log_warn("%s unable to set iscsi param err=%d, "
|
|
||||||
"ddp disabled.\n", tdev->name, err);
|
|
||||||
goto free_ddp_map;
|
|
||||||
}
|
|
||||||
|
|
||||||
tdev->ulp_iscsi = ddp;
|
|
||||||
|
|
||||||
ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u,"
|
|
||||||
" %u/%u.\n",
|
|
||||||
tdev, ppmax, ddp->idx_bits, ddp->idx_mask,
|
|
||||||
ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz,
|
|
||||||
ddp->max_rxsz, uinfo.max_rxsz);
|
|
||||||
return;
|
|
||||||
|
|
||||||
free_ddp_map:
|
|
||||||
cxgb3i_free_big_mem(ddp);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_init - initialize ddp functions
|
|
||||||
*/
|
|
||||||
void cxgb3i_ddp_init(struct t3cdev *tdev)
|
|
||||||
{
|
|
||||||
if (page_idx == DDP_PGIDX_MAX) {
|
|
||||||
page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
|
|
||||||
|
|
||||||
if (page_idx == DDP_PGIDX_MAX) {
|
|
||||||
ddp_log_info("system PAGE_SIZE %lu, update hw.\n",
|
|
||||||
PAGE_SIZE);
|
|
||||||
if (cxgb3i_ddp_adjust_page_table() < 0) {
|
|
||||||
ddp_log_info("PAGE_SIZE %lu, ddp disabled.\n",
|
|
||||||
PAGE_SIZE);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
|
|
||||||
}
|
|
||||||
ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n",
|
|
||||||
PAGE_SIZE, page_idx);
|
|
||||||
}
|
|
||||||
ddp_init(tdev);
|
|
||||||
}
|
|
||||||
@ -1,312 +0,0 @@
|
|||||||
/*
|
|
||||||
* cxgb3i_ddp.h: Chelsio S3xx iSCSI DDP Manager.
|
|
||||||
*
|
|
||||||
* Copyright (c) 2008 Chelsio Communications, Inc.
|
|
||||||
*
|
|
||||||
* This program 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.
|
|
||||||
*
|
|
||||||
* Written by: Karen Xie (kxie@chelsio.com)
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __CXGB3I_ULP2_DDP_H__
|
|
||||||
#define __CXGB3I_ULP2_DDP_H__
|
|
||||||
|
|
||||||
#include <linux/slab.h>
|
|
||||||
#include <linux/vmalloc.h>
|
|
||||||
|
|
||||||
/**
|
|
||||||
* struct cxgb3i_tag_format - cxgb3i ulp tag format for an iscsi entity
|
|
||||||
*
|
|
||||||
* @sw_bits: # of bits used by iscsi software layer
|
|
||||||
* @rsvd_bits: # of bits used by h/w
|
|
||||||
* @rsvd_shift: h/w bits shift left
|
|
||||||
* @rsvd_mask: reserved bit mask
|
|
||||||
*/
|
|
||||||
struct cxgb3i_tag_format {
|
|
||||||
unsigned char sw_bits;
|
|
||||||
unsigned char rsvd_bits;
|
|
||||||
unsigned char rsvd_shift;
|
|
||||||
unsigned char filler[1];
|
|
||||||
u32 rsvd_mask;
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* struct cxgb3i_gather_list - cxgb3i direct data placement memory
|
|
||||||
*
|
|
||||||
* @tag: ddp tag
|
|
||||||
* @length: total data buffer length
|
|
||||||
* @offset: initial offset to the 1st page
|
|
||||||
* @nelem: # of pages
|
|
||||||
* @pages: page pointers
|
|
||||||
* @phys_addr: physical address
|
|
||||||
*/
|
|
||||||
struct cxgb3i_gather_list {
|
|
||||||
u32 tag;
|
|
||||||
unsigned int length;
|
|
||||||
unsigned int offset;
|
|
||||||
unsigned int nelem;
|
|
||||||
struct page **pages;
|
|
||||||
dma_addr_t phys_addr[0];
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* struct cxgb3i_ddp_info - cxgb3i direct data placement for pdu payload
|
|
||||||
*
|
|
||||||
* @list: list head to link elements
|
|
||||||
* @refcnt: ref. count
|
|
||||||
* @tdev: pointer to t3cdev used by cxgb3 driver
|
|
||||||
* @max_txsz: max tx packet size for ddp
|
|
||||||
* @max_rxsz: max rx packet size for ddp
|
|
||||||
* @llimit: lower bound of the page pod memory
|
|
||||||
* @ulimit: upper bound of the page pod memory
|
|
||||||
* @nppods: # of page pod entries
|
|
||||||
* @idx_last: page pod entry last used
|
|
||||||
* @idx_bits: # of bits the pagepod index would take
|
|
||||||
* @idx_mask: pagepod index mask
|
|
||||||
* @rsvd_tag_mask: tag mask
|
|
||||||
* @map_lock: lock to synchonize access to the page pod map
|
|
||||||
* @gl_map: ddp memory gather list
|
|
||||||
* @gl_skb: skb used to program the pagepod
|
|
||||||
*/
|
|
||||||
struct cxgb3i_ddp_info {
|
|
||||||
struct list_head list;
|
|
||||||
struct kref refcnt;
|
|
||||||
struct t3cdev *tdev;
|
|
||||||
struct pci_dev *pdev;
|
|
||||||
unsigned int max_txsz;
|
|
||||||
unsigned int max_rxsz;
|
|
||||||
unsigned int llimit;
|
|
||||||
unsigned int ulimit;
|
|
||||||
unsigned int nppods;
|
|
||||||
unsigned int idx_last;
|
|
||||||
unsigned char idx_bits;
|
|
||||||
unsigned char filler[3];
|
|
||||||
u32 idx_mask;
|
|
||||||
u32 rsvd_tag_mask;
|
|
||||||
spinlock_t map_lock;
|
|
||||||
struct cxgb3i_gather_list **gl_map;
|
|
||||||
struct sk_buff **gl_skb;
|
|
||||||
};
|
|
||||||
|
|
||||||
#define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8) */
|
|
||||||
#define ULP2_MAX_PKT_SIZE 16224
|
|
||||||
#define ULP2_MAX_PDU_PAYLOAD (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)
|
|
||||||
#define PPOD_PAGES_MAX 4
|
|
||||||
#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */
|
|
||||||
|
|
||||||
/*
|
|
||||||
* struct pagepod_hdr, pagepod - pagepod format
|
|
||||||
*/
|
|
||||||
struct pagepod_hdr {
|
|
||||||
u32 vld_tid;
|
|
||||||
u32 pgsz_tag_clr;
|
|
||||||
u32 maxoffset;
|
|
||||||
u32 pgoffset;
|
|
||||||
u64 rsvd;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct pagepod {
|
|
||||||
struct pagepod_hdr hdr;
|
|
||||||
u64 addr[PPOD_PAGES_MAX + 1];
|
|
||||||
};
|
|
||||||
|
|
||||||
#define PPOD_SIZE sizeof(struct pagepod) /* 64 */
|
|
||||||
#define PPOD_SIZE_SHIFT 6
|
|
||||||
|
|
||||||
#define PPOD_COLOR_SHIFT 0
|
|
||||||
#define PPOD_COLOR_SIZE 6
|
|
||||||
#define PPOD_COLOR_MASK ((1 << PPOD_COLOR_SIZE) - 1)
|
|
||||||
|
|
||||||
#define PPOD_IDX_SHIFT PPOD_COLOR_SIZE
|
|
||||||
#define PPOD_IDX_MAX_SIZE 24
|
|
||||||
|
|
||||||
#define S_PPOD_TID 0
|
|
||||||
#define M_PPOD_TID 0xFFFFFF
|
|
||||||
#define V_PPOD_TID(x) ((x) << S_PPOD_TID)
|
|
||||||
|
|
||||||
#define S_PPOD_VALID 24
|
|
||||||
#define V_PPOD_VALID(x) ((x) << S_PPOD_VALID)
|
|
||||||
#define F_PPOD_VALID V_PPOD_VALID(1U)
|
|
||||||
|
|
||||||
#define S_PPOD_COLOR 0
|
|
||||||
#define M_PPOD_COLOR 0x3F
|
|
||||||
#define V_PPOD_COLOR(x) ((x) << S_PPOD_COLOR)
|
|
||||||
|
|
||||||
#define S_PPOD_TAG 6
|
|
||||||
#define M_PPOD_TAG 0xFFFFFF
|
|
||||||
#define V_PPOD_TAG(x) ((x) << S_PPOD_TAG)
|
|
||||||
|
|
||||||
#define S_PPOD_PGSZ 30
|
|
||||||
#define M_PPOD_PGSZ 0x3
|
|
||||||
#define V_PPOD_PGSZ(x) ((x) << S_PPOD_PGSZ)
|
|
||||||
|
|
||||||
/*
|
|
||||||
* large memory chunk allocation/release
|
|
||||||
* use vmalloc() if kmalloc() fails
|
|
||||||
*/
|
|
||||||
static inline void *cxgb3i_alloc_big_mem(unsigned int size,
|
|
||||||
gfp_t gfp)
|
|
||||||
{
|
|
||||||
void *p = kmalloc(size, gfp);
|
|
||||||
if (!p)
|
|
||||||
p = vmalloc(size);
|
|
||||||
if (p)
|
|
||||||
memset(p, 0, size);
|
|
||||||
return p;
|
|
||||||
}
|
|
||||||
|
|
||||||
static inline void cxgb3i_free_big_mem(void *addr)
|
|
||||||
{
|
|
||||||
if (is_vmalloc_addr(addr))
|
|
||||||
vfree(addr);
|
|
||||||
else
|
|
||||||
kfree(addr);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* cxgb3i ddp tag are 32 bits, it consists of reserved bits used by h/w and
|
|
||||||
* non-reserved bits that can be used by the iscsi s/w.
|
|
||||||
* The reserved bits are identified by the rsvd_bits and rsvd_shift fields
|
|
||||||
* in struct cxgb3i_tag_format.
|
|
||||||
*
|
|
||||||
* The upper most reserved bit can be used to check if a tag is ddp tag or not:
|
|
||||||
* if the bit is 0, the tag is a valid ddp tag
|
|
||||||
*/
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_is_ddp_tag - check if a given tag is a hw/ddp tag
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @tag: tag to be checked
|
|
||||||
*
|
|
||||||
* return true if the tag is a ddp tag, false otherwise.
|
|
||||||
*/
|
|
||||||
static inline int cxgb3i_is_ddp_tag(struct cxgb3i_tag_format *tformat, u32 tag)
|
|
||||||
{
|
|
||||||
return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1)));
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_sw_tag_usable - check if s/w tag has enough bits left for hw bits
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @sw_tag: s/w tag to be checked
|
|
||||||
*
|
|
||||||
* return true if the tag can be used for hw ddp tag, false otherwise.
|
|
||||||
*/
|
|
||||||
static inline int cxgb3i_sw_tag_usable(struct cxgb3i_tag_format *tformat,
|
|
||||||
u32 sw_tag)
|
|
||||||
{
|
|
||||||
sw_tag >>= (32 - tformat->rsvd_bits);
|
|
||||||
return !sw_tag;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_set_non_ddp_tag - mark a given s/w tag as an invalid ddp tag
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @sw_tag: s/w tag to be checked
|
|
||||||
*
|
|
||||||
* insert 1 at the upper most reserved bit to mark it as an invalid ddp tag.
|
|
||||||
*/
|
|
||||||
static inline u32 cxgb3i_set_non_ddp_tag(struct cxgb3i_tag_format *tformat,
|
|
||||||
u32 sw_tag)
|
|
||||||
{
|
|
||||||
unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;
|
|
||||||
u32 mask = (1 << shift) - 1;
|
|
||||||
|
|
||||||
if (sw_tag && (sw_tag & ~mask)) {
|
|
||||||
u32 v1 = sw_tag & ((1 << shift) - 1);
|
|
||||||
u32 v2 = (sw_tag >> (shift - 1)) << shift;
|
|
||||||
|
|
||||||
return v2 | v1 | 1 << shift;
|
|
||||||
}
|
|
||||||
return sw_tag | 1 << shift;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_ddp_tag_base - shift s/w tag bits so that reserved bits are not used
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @sw_tag: s/w tag to be checked
|
|
||||||
*/
|
|
||||||
static inline u32 cxgb3i_ddp_tag_base(struct cxgb3i_tag_format *tformat,
|
|
||||||
u32 sw_tag)
|
|
||||||
{
|
|
||||||
u32 mask = (1 << tformat->rsvd_shift) - 1;
|
|
||||||
|
|
||||||
if (sw_tag && (sw_tag & ~mask)) {
|
|
||||||
u32 v1 = sw_tag & mask;
|
|
||||||
u32 v2 = sw_tag >> tformat->rsvd_shift;
|
|
||||||
|
|
||||||
v2 <<= tformat->rsvd_shift + tformat->rsvd_bits;
|
|
||||||
return v2 | v1;
|
|
||||||
}
|
|
||||||
return sw_tag;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_tag_rsvd_bits - get the reserved bits used by the h/w
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @tag: tag to be checked
|
|
||||||
*
|
|
||||||
* return the reserved bits in the tag
|
|
||||||
*/
|
|
||||||
static inline u32 cxgb3i_tag_rsvd_bits(struct cxgb3i_tag_format *tformat,
|
|
||||||
u32 tag)
|
|
||||||
{
|
|
||||||
if (cxgb3i_is_ddp_tag(tformat, tag))
|
|
||||||
return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_tag_nonrsvd_bits - get the non-reserved bits used by the s/w
|
|
||||||
* @tformat: tag format information
|
|
||||||
* @tag: tag to be checked
|
|
||||||
*
|
|
||||||
* return the non-reserved bits in the tag.
|
|
||||||
*/
|
|
||||||
static inline u32 cxgb3i_tag_nonrsvd_bits(struct cxgb3i_tag_format *tformat,
|
|
||||||
u32 tag)
|
|
||||||
{
|
|
||||||
unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;
|
|
||||||
u32 v1, v2;
|
|
||||||
|
|
||||||
if (cxgb3i_is_ddp_tag(tformat, tag)) {
|
|
||||||
v1 = tag & ((1 << tformat->rsvd_shift) - 1);
|
|
||||||
v2 = (tag >> (shift + 1)) << tformat->rsvd_shift;
|
|
||||||
} else {
|
|
||||||
u32 mask = (1 << shift) - 1;
|
|
||||||
|
|
||||||
tag &= ~(1 << shift);
|
|
||||||
v1 = tag & mask;
|
|
||||||
v2 = (tag >> 1) & ~mask;
|
|
||||||
}
|
|
||||||
return v1 | v2;
|
|
||||||
}
|
|
||||||
|
|
||||||
int cxgb3i_ddp_tag_reserve(struct t3cdev *, unsigned int tid,
|
|
||||||
struct cxgb3i_tag_format *, u32 *tag,
|
|
||||||
struct cxgb3i_gather_list *, gfp_t gfp);
|
|
||||||
void cxgb3i_ddp_tag_release(struct t3cdev *, u32 tag);
|
|
||||||
|
|
||||||
struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen,
|
|
||||||
struct scatterlist *sgl,
|
|
||||||
unsigned int sgcnt,
|
|
||||||
struct pci_dev *pdev,
|
|
||||||
gfp_t gfp);
|
|
||||||
void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl,
|
|
||||||
struct pci_dev *pdev);
|
|
||||||
|
|
||||||
int cxgb3i_setup_conn_host_pagesize(struct t3cdev *, unsigned int tid,
|
|
||||||
int reply);
|
|
||||||
int cxgb3i_setup_conn_pagesize(struct t3cdev *, unsigned int tid, int reply,
|
|
||||||
unsigned long pgsz);
|
|
||||||
int cxgb3i_setup_conn_digest(struct t3cdev *, unsigned int tid,
|
|
||||||
int hcrc, int dcrc, int reply);
|
|
||||||
int cxgb3i_ddp_find_page_index(unsigned long pgsz);
|
|
||||||
int cxgb3i_adapter_ddp_info(struct t3cdev *, struct cxgb3i_tag_format *,
|
|
||||||
unsigned int *txsz, unsigned int *rxsz);
|
|
||||||
|
|
||||||
void cxgb3i_ddp_init(struct t3cdev *);
|
|
||||||
void cxgb3i_ddp_cleanup(struct t3cdev *);
|
|
||||||
#endif
|
|
||||||
@ -1,132 +0,0 @@
|
|||||||
/* cxgb3i_init.c: Chelsio S3xx iSCSI driver.
|
|
||||||
*
|
|
||||||
* Copyright (c) 2008 Chelsio Communications, Inc.
|
|
||||||
*
|
|
||||||
* This program 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.
|
|
||||||
*
|
|
||||||
* Written by: Karen Xie (kxie@chelsio.com)
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include "cxgb3i.h"
|
|
||||||
|
|
||||||
#define DRV_MODULE_NAME "cxgb3i"
|
|
||||||
#define DRV_MODULE_VERSION "1.0.2"
|
|
||||||
#define DRV_MODULE_RELDATE "Mar. 2009"
|
|
||||||
|
|
||||||
static char version[] =
|
|
||||||
"Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME
|
|
||||||
" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
|
|
||||||
|
|
||||||
MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
|
|
||||||
MODULE_DESCRIPTION("Chelsio S3xx iSCSI Driver");
|
|
||||||
MODULE_LICENSE("GPL");
|
|
||||||
MODULE_VERSION(DRV_MODULE_VERSION);
|
|
||||||
|
|
||||||
static void open_s3_dev(struct t3cdev *);
|
|
||||||
static void close_s3_dev(struct t3cdev *);
|
|
||||||
static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port);
|
|
||||||
|
|
||||||
static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
|
|
||||||
static struct cxgb3_client t3c_client = {
|
|
||||||
.name = "iscsi_cxgb3",
|
|
||||||
.handlers = cxgb3i_cpl_handlers,
|
|
||||||
.add = open_s3_dev,
|
|
||||||
.remove = close_s3_dev,
|
|
||||||
.event_handler = s3_event_handler,
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* open_s3_dev - register with cxgb3 LLD
|
|
||||||
* @t3dev: cxgb3 adapter instance
|
|
||||||
*/
|
|
||||||
static void open_s3_dev(struct t3cdev *t3dev)
|
|
||||||
{
|
|
||||||
static int vers_printed;
|
|
||||||
|
|
||||||
if (!vers_printed) {
|
|
||||||
printk(KERN_INFO "%s", version);
|
|
||||||
vers_printed = 1;
|
|
||||||
}
|
|
||||||
|
|
||||||
cxgb3i_ddp_init(t3dev);
|
|
||||||
cxgb3i_sdev_add(t3dev, &t3c_client);
|
|
||||||
cxgb3i_adapter_open(t3dev);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* close_s3_dev - de-register with cxgb3 LLD
|
|
||||||
* @t3dev: cxgb3 adapter instance
|
|
||||||
*/
|
|
||||||
static void close_s3_dev(struct t3cdev *t3dev)
|
|
||||||
{
|
|
||||||
cxgb3i_adapter_close(t3dev);
|
|
||||||
cxgb3i_sdev_remove(t3dev);
|
|
||||||
cxgb3i_ddp_cleanup(t3dev);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port)
|
|
||||||
{
|
|
||||||
struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(tdev);
|
|
||||||
|
|
||||||
cxgb3i_log_info("snic 0x%p, tdev 0x%p, event 0x%x, port 0x%x.\n",
|
|
||||||
snic, tdev, event, port);
|
|
||||||
if (!snic)
|
|
||||||
return;
|
|
||||||
|
|
||||||
switch (event) {
|
|
||||||
case OFFLOAD_STATUS_DOWN:
|
|
||||||
snic->flags |= CXGB3I_ADAPTER_FLAG_RESET;
|
|
||||||
break;
|
|
||||||
case OFFLOAD_STATUS_UP:
|
|
||||||
snic->flags &= ~CXGB3I_ADAPTER_FLAG_RESET;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_init_module - module init entry point
|
|
||||||
*
|
|
||||||
* initialize any driver wide global data structures and register itself
|
|
||||||
* with the cxgb3 module
|
|
||||||
*/
|
|
||||||
static int __init cxgb3i_init_module(void)
|
|
||||||
{
|
|
||||||
int err;
|
|
||||||
|
|
||||||
err = cxgb3i_sdev_init(cxgb3i_cpl_handlers);
|
|
||||||
if (err < 0)
|
|
||||||
return err;
|
|
||||||
|
|
||||||
err = cxgb3i_iscsi_init();
|
|
||||||
if (err < 0)
|
|
||||||
return err;
|
|
||||||
|
|
||||||
err = cxgb3i_pdu_init();
|
|
||||||
if (err < 0) {
|
|
||||||
cxgb3i_iscsi_cleanup();
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
|
|
||||||
cxgb3_register_client(&t3c_client);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_exit_module - module cleanup/exit entry point
|
|
||||||
*
|
|
||||||
* go through the driver hba list and for each hba, release any resource held.
|
|
||||||
* and unregisters iscsi transport and the cxgb3 module
|
|
||||||
*/
|
|
||||||
static void __exit cxgb3i_exit_module(void)
|
|
||||||
{
|
|
||||||
cxgb3_unregister_client(&t3c_client);
|
|
||||||
cxgb3i_pdu_cleanup();
|
|
||||||
cxgb3i_iscsi_cleanup();
|
|
||||||
cxgb3i_sdev_cleanup();
|
|
||||||
}
|
|
||||||
|
|
||||||
module_init(cxgb3i_init_module);
|
|
||||||
module_exit(cxgb3i_exit_module);
|
|
||||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -1,243 +0,0 @@
|
|||||||
/*
|
|
||||||
* cxgb3i_offload.h: Chelsio S3xx iscsi offloaded tcp connection management
|
|
||||||
*
|
|
||||||
* Copyright (C) 2003-2008 Chelsio Communications. All rights reserved.
|
|
||||||
*
|
|
||||||
* 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 LICENSE file included in this
|
|
||||||
* release for licensing terms and conditions.
|
|
||||||
*
|
|
||||||
* Written by: Dimitris Michailidis (dm@chelsio.com)
|
|
||||||
* Karen Xie (kxie@chelsio.com)
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef _CXGB3I_OFFLOAD_H
|
|
||||||
#define _CXGB3I_OFFLOAD_H
|
|
||||||
|
|
||||||
#include <linux/skbuff.h>
|
|
||||||
#include <linux/in.h>
|
|
||||||
|
|
||||||
#include "common.h"
|
|
||||||
#include "adapter.h"
|
|
||||||
#include "t3cdev.h"
|
|
||||||
#include "cxgb3_offload.h"
|
|
||||||
|
|
||||||
#define cxgb3i_log_error(fmt...) printk(KERN_ERR "cxgb3i: ERR! " fmt)
|
|
||||||
#define cxgb3i_log_warn(fmt...) printk(KERN_WARNING "cxgb3i: WARN! " fmt)
|
|
||||||
#define cxgb3i_log_info(fmt...) printk(KERN_INFO "cxgb3i: " fmt)
|
|
||||||
#define cxgb3i_log_debug(fmt, args...) \
|
|
||||||
printk(KERN_INFO "cxgb3i: %s - " fmt, __func__ , ## args)
|
|
||||||
|
|
||||||
/**
|
|
||||||
* struct s3_conn - an iscsi tcp connection structure
|
|
||||||
*
|
|
||||||
* @dev: net device of with connection
|
|
||||||
* @cdev: adapter t3cdev for net device
|
|
||||||
* @flags: see c3cn_flags below
|
|
||||||
* @tid: connection id assigned by the h/w
|
|
||||||
* @qset: queue set used by connection
|
|
||||||
* @mss_idx: Maximum Segment Size table index
|
|
||||||
* @l2t: ARP resolution entry for offload packets
|
|
||||||
* @wr_max: maximum in-flight writes
|
|
||||||
* @wr_avail: number of writes available
|
|
||||||
* @wr_unacked: writes since last request for completion notification
|
|
||||||
* @wr_pending_head: head of pending write queue
|
|
||||||
* @wr_pending_tail: tail of pending write queue
|
|
||||||
* @cpl_close: skb for cpl_close_req
|
|
||||||
* @cpl_abort_req: skb for cpl_abort_req
|
|
||||||
* @cpl_abort_rpl: skb for cpl_abort_rpl
|
|
||||||
* @lock: connection status lock
|
|
||||||
* @refcnt: reference count on connection
|
|
||||||
* @state: connection state
|
|
||||||
* @saddr: source ip/port address
|
|
||||||
* @daddr: destination ip/port address
|
|
||||||
* @dst_cache: reference to destination route
|
|
||||||
* @receive_queue: received PDUs
|
|
||||||
* @write_queue: un-pushed pending writes
|
|
||||||
* @retry_timer: retry timer for various operations
|
|
||||||
* @err: connection error status
|
|
||||||
* @callback_lock: lock for opaque user context
|
|
||||||
* @user_data: opaque user context
|
|
||||||
* @rcv_nxt: next receive seq. #
|
|
||||||
* @copied_seq: head of yet unread data
|
|
||||||
* @rcv_wup: rcv_nxt on last window update sent
|
|
||||||
* @snd_nxt: next sequence we send
|
|
||||||
* @snd_una: first byte we want an ack for
|
|
||||||
* @write_seq: tail+1 of data held in send buffer
|
|
||||||
*/
|
|
||||||
struct s3_conn {
|
|
||||||
struct net_device *dev;
|
|
||||||
struct t3cdev *cdev;
|
|
||||||
unsigned long flags;
|
|
||||||
int tid;
|
|
||||||
int qset;
|
|
||||||
int mss_idx;
|
|
||||||
struct l2t_entry *l2t;
|
|
||||||
int wr_max;
|
|
||||||
int wr_avail;
|
|
||||||
int wr_unacked;
|
|
||||||
struct sk_buff *wr_pending_head;
|
|
||||||
struct sk_buff *wr_pending_tail;
|
|
||||||
struct sk_buff *cpl_close;
|
|
||||||
struct sk_buff *cpl_abort_req;
|
|
||||||
struct sk_buff *cpl_abort_rpl;
|
|
||||||
spinlock_t lock;
|
|
||||||
atomic_t refcnt;
|
|
||||||
volatile unsigned int state;
|
|
||||||
struct sockaddr_in saddr;
|
|
||||||
struct sockaddr_in daddr;
|
|
||||||
struct dst_entry *dst_cache;
|
|
||||||
struct sk_buff_head receive_queue;
|
|
||||||
struct sk_buff_head write_queue;
|
|
||||||
struct timer_list retry_timer;
|
|
||||||
int err;
|
|
||||||
rwlock_t callback_lock;
|
|
||||||
void *user_data;
|
|
||||||
|
|
||||||
u32 rcv_nxt;
|
|
||||||
u32 copied_seq;
|
|
||||||
u32 rcv_wup;
|
|
||||||
u32 snd_nxt;
|
|
||||||
u32 snd_una;
|
|
||||||
u32 write_seq;
|
|
||||||
};
|
|
||||||
|
|
||||||
/*
|
|
||||||
* connection state
|
|
||||||
*/
|
|
||||||
enum conn_states {
|
|
||||||
C3CN_STATE_CONNECTING = 1,
|
|
||||||
C3CN_STATE_ESTABLISHED,
|
|
||||||
C3CN_STATE_ACTIVE_CLOSE,
|
|
||||||
C3CN_STATE_PASSIVE_CLOSE,
|
|
||||||
C3CN_STATE_CLOSE_WAIT_1,
|
|
||||||
C3CN_STATE_CLOSE_WAIT_2,
|
|
||||||
C3CN_STATE_ABORTING,
|
|
||||||
C3CN_STATE_CLOSED,
|
|
||||||
};
|
|
||||||
|
|
||||||
static inline unsigned int c3cn_is_closing(const struct s3_conn *c3cn)
|
|
||||||
{
|
|
||||||
return c3cn->state >= C3CN_STATE_ACTIVE_CLOSE;
|
|
||||||
}
|
|
||||||
static inline unsigned int c3cn_is_established(const struct s3_conn *c3cn)
|
|
||||||
{
|
|
||||||
return c3cn->state == C3CN_STATE_ESTABLISHED;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Connection flags -- many to track some close related events.
|
|
||||||
*/
|
|
||||||
enum c3cn_flags {
|
|
||||||
C3CN_ABORT_RPL_RCVD, /* received one ABORT_RPL_RSS message */
|
|
||||||
C3CN_ABORT_REQ_RCVD, /* received one ABORT_REQ_RSS message */
|
|
||||||
C3CN_ABORT_RPL_PENDING, /* expecting an abort reply */
|
|
||||||
C3CN_TX_DATA_SENT, /* already sent a TX_DATA WR */
|
|
||||||
C3CN_ACTIVE_CLOSE_NEEDED, /* need to be closed */
|
|
||||||
C3CN_OFFLOAD_DOWN /* offload function off */
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3i_sdev_data - Per adapter data.
|
|
||||||
* Linked off of each Ethernet device port on the adapter.
|
|
||||||
* Also available via the t3cdev structure since we have pointers to our port
|
|
||||||
* net_device's there ...
|
|
||||||
*
|
|
||||||
* @list: list head to link elements
|
|
||||||
* @cdev: t3cdev adapter
|
|
||||||
* @client: CPL client pointer
|
|
||||||
* @ports: array of adapter ports
|
|
||||||
* @sport_next: next port
|
|
||||||
* @sport_conn: source port connection
|
|
||||||
*/
|
|
||||||
struct cxgb3i_sdev_data {
|
|
||||||
struct list_head list;
|
|
||||||
struct t3cdev *cdev;
|
|
||||||
struct cxgb3_client *client;
|
|
||||||
struct adap_ports ports;
|
|
||||||
spinlock_t lock;
|
|
||||||
unsigned int sport_next;
|
|
||||||
struct s3_conn *sport_conn[0];
|
|
||||||
};
|
|
||||||
#define NDEV2CDATA(ndev) (*(struct cxgb3i_sdev_data **)&(ndev)->ec_ptr)
|
|
||||||
#define CXGB3_SDEV_DATA(cdev) NDEV2CDATA((cdev)->lldev)
|
|
||||||
|
|
||||||
void cxgb3i_sdev_cleanup(void);
|
|
||||||
int cxgb3i_sdev_init(cxgb3_cpl_handler_func *);
|
|
||||||
void cxgb3i_sdev_add(struct t3cdev *, struct cxgb3_client *);
|
|
||||||
void cxgb3i_sdev_remove(struct t3cdev *);
|
|
||||||
|
|
||||||
struct s3_conn *cxgb3i_c3cn_create(void);
|
|
||||||
int cxgb3i_c3cn_connect(struct net_device *, struct s3_conn *,
|
|
||||||
struct sockaddr_in *);
|
|
||||||
void cxgb3i_c3cn_rx_credits(struct s3_conn *, int);
|
|
||||||
int cxgb3i_c3cn_send_pdus(struct s3_conn *, struct sk_buff *);
|
|
||||||
void cxgb3i_c3cn_release(struct s3_conn *);
|
|
||||||
|
|
||||||
/**
|
|
||||||
* cxgb3_skb_cb - control block for received pdu state and ULP mode management.
|
|
||||||
*
|
|
||||||
* @flag: see C3CB_FLAG_* below
|
|
||||||
* @ulp_mode: ULP mode/submode of sk_buff
|
|
||||||
* @seq: tcp sequence number
|
|
||||||
*/
|
|
||||||
struct cxgb3_skb_rx_cb {
|
|
||||||
__u32 ddigest; /* data digest */
|
|
||||||
__u32 pdulen; /* recovered pdu length */
|
|
||||||
};
|
|
||||||
|
|
||||||
struct cxgb3_skb_tx_cb {
|
|
||||||
struct sk_buff *wr_next; /* next wr */
|
|
||||||
};
|
|
||||||
|
|
||||||
struct cxgb3_skb_cb {
|
|
||||||
__u8 flags;
|
|
||||||
__u8 ulp_mode;
|
|
||||||
__u32 seq;
|
|
||||||
union {
|
|
||||||
struct cxgb3_skb_rx_cb rx;
|
|
||||||
struct cxgb3_skb_tx_cb tx;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
#define CXGB3_SKB_CB(skb) ((struct cxgb3_skb_cb *)&((skb)->cb[0]))
|
|
||||||
#define skb_flags(skb) (CXGB3_SKB_CB(skb)->flags)
|
|
||||||
#define skb_ulp_mode(skb) (CXGB3_SKB_CB(skb)->ulp_mode)
|
|
||||||
#define skb_tcp_seq(skb) (CXGB3_SKB_CB(skb)->seq)
|
|
||||||
#define skb_rx_ddigest(skb) (CXGB3_SKB_CB(skb)->rx.ddigest)
|
|
||||||
#define skb_rx_pdulen(skb) (CXGB3_SKB_CB(skb)->rx.pdulen)
|
|
||||||
#define skb_tx_wr_next(skb) (CXGB3_SKB_CB(skb)->tx.wr_next)
|
|
||||||
|
|
||||||
enum c3cb_flags {
|
|
||||||
C3CB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */
|
|
||||||
C3CB_FLAG_NO_APPEND = 1 << 1, /* don't grow this skb */
|
|
||||||
C3CB_FLAG_COMPL = 1 << 2, /* request WR completion */
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* sge_opaque_hdr -
|
|
||||||
* Opaque version of structure the SGE stores at skb->head of TX_DATA packets
|
|
||||||
* and for which we must reserve space.
|
|
||||||
*/
|
|
||||||
struct sge_opaque_hdr {
|
|
||||||
void *dev;
|
|
||||||
dma_addr_t addr[MAX_SKB_FRAGS + 1];
|
|
||||||
};
|
|
||||||
|
|
||||||
/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
|
|
||||||
#define TX_HEADER_LEN \
|
|
||||||
(sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr))
|
|
||||||
#define SKB_TX_HEADROOM SKB_MAX_HEAD(TX_HEADER_LEN)
|
|
||||||
|
|
||||||
/*
|
|
||||||
* get and set private ip for iscsi traffic
|
|
||||||
*/
|
|
||||||
#define cxgb3i_get_private_ipv4addr(ndev) \
|
|
||||||
(((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr)
|
|
||||||
#define cxgb3i_set_private_ipv4addr(ndev, addr) \
|
|
||||||
(((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr
|
|
||||||
|
|
||||||
/* max. connections per adapter */
|
|
||||||
#define CXGB3I_MAX_CONN 16384
|
|
||||||
#endif /* _CXGB3_OFFLOAD_H */
|
|
||||||
@ -1,495 +0,0 @@
|
|||||||
/*
|
|
||||||
* cxgb3i_pdu.c: Chelsio S3xx iSCSI driver.
|
|
||||||
*
|
|
||||||
* Copyright (c) 2008 Chelsio Communications, Inc.
|
|
||||||
* Copyright (c) 2008 Mike Christie
|
|
||||||
* Copyright (c) 2008 Red Hat, Inc. 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 as published by
|
|
||||||
* the Free Software Foundation.
|
|
||||||
*
|
|
||||||
* Written by: Karen Xie (kxie@chelsio.com)
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <linux/slab.h>
|
|
||||||
#include <linux/skbuff.h>
|
|
||||||
#include <linux/crypto.h>
|
|
||||||
#include <scsi/scsi_cmnd.h>
|
|
||||||
#include <scsi/scsi_host.h>
|
|
||||||
|
|
||||||
#include "cxgb3i.h"
|
|
||||||
#include "cxgb3i_pdu.h"
|
|
||||||
|
|
||||||
#ifdef __DEBUG_CXGB3I_RX__
|
|
||||||
#define cxgb3i_rx_debug cxgb3i_log_debug
|
|
||||||
#else
|
|
||||||
#define cxgb3i_rx_debug(fmt...)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#ifdef __DEBUG_CXGB3I_TX__
|
|
||||||
#define cxgb3i_tx_debug cxgb3i_log_debug
|
|
||||||
#else
|
|
||||||
#define cxgb3i_tx_debug(fmt...)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* always allocate rooms for AHS */
|
|
||||||
#define SKB_TX_PDU_HEADER_LEN \
|
|
||||||
(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)
|
|
||||||
static unsigned int skb_extra_headroom;
|
|
||||||
static struct page *pad_page;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* pdu receive, interact with libiscsi_tcp
|
|
||||||
*/
|
|
||||||
static inline int read_pdu_skb(struct iscsi_conn *conn, struct sk_buff *skb,
|
|
||||||
unsigned int offset, int offloaded)
|
|
||||||
{
|
|
||||||
int status = 0;
|
|
||||||
int bytes_read;
|
|
||||||
|
|
||||||
bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status);
|
|
||||||
switch (status) {
|
|
||||||
case ISCSI_TCP_CONN_ERR:
|
|
||||||
return -EIO;
|
|
||||||
case ISCSI_TCP_SUSPENDED:
|
|
||||||
/* no transfer - just have caller flush queue */
|
|
||||||
return bytes_read;
|
|
||||||
case ISCSI_TCP_SKB_DONE:
|
|
||||||
/*
|
|
||||||
* pdus should always fit in the skb and we should get
|
|
||||||
* segment done notifcation.
|
|
||||||
*/
|
|
||||||
iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb.");
|
|
||||||
return -EFAULT;
|
|
||||||
case ISCSI_TCP_SEGMENT_DONE:
|
|
||||||
return bytes_read;
|
|
||||||
default:
|
|
||||||
iscsi_conn_printk(KERN_ERR, conn, "Invalid iscsi_tcp_recv_skb "
|
|
||||||
"status %d\n", status);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static int cxgb3i_conn_read_pdu_skb(struct iscsi_conn *conn,
|
|
||||||
struct sk_buff *skb)
|
|
||||||
{
|
|
||||||
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
||||||
bool offloaded = 0;
|
|
||||||
unsigned int offset;
|
|
||||||
int rc;
|
|
||||||
|
|
||||||
cxgb3i_rx_debug("conn 0x%p, skb 0x%p, len %u, flag 0x%x.\n",
|
|
||||||
conn, skb, skb->len, skb_ulp_mode(skb));
|
|
||||||
|
|
||||||
if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) {
|
|
||||||
iscsi_conn_failure(conn, ISCSI_ERR_PROTO);
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (conn->hdrdgst_en && (skb_ulp_mode(skb) & ULP2_FLAG_HCRC_ERROR)) {
|
|
||||||
iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST);
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (conn->datadgst_en && (skb_ulp_mode(skb) & ULP2_FLAG_DCRC_ERROR)) {
|
|
||||||
iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* iscsi hdr */
|
|
||||||
rc = read_pdu_skb(conn, skb, 0, 0);
|
|
||||||
if (rc <= 0)
|
|
||||||
return rc;
|
|
||||||
|
|
||||||
if (iscsi_tcp_recv_segment_is_hdr(tcp_conn))
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
offset = rc;
|
|
||||||
if (conn->hdrdgst_en)
|
|
||||||
offset += ISCSI_DIGEST_SIZE;
|
|
||||||
|
|
||||||
/* iscsi data */
|
|
||||||
if (skb_ulp_mode(skb) & ULP2_FLAG_DATA_DDPED) {
|
|
||||||
cxgb3i_rx_debug("skb 0x%p, opcode 0x%x, data %u, ddp'ed, "
|
|
||||||
"itt 0x%x.\n",
|
|
||||||
skb,
|
|
||||||
tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK,
|
|
||||||
tcp_conn->in.datalen,
|
|
||||||
ntohl(tcp_conn->in.hdr->itt));
|
|
||||||
offloaded = 1;
|
|
||||||
} else {
|
|
||||||
cxgb3i_rx_debug("skb 0x%p, opcode 0x%x, data %u, NOT ddp'ed, "
|
|
||||||
"itt 0x%x.\n",
|
|
||||||
skb,
|
|
||||||
tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK,
|
|
||||||
tcp_conn->in.datalen,
|
|
||||||
ntohl(tcp_conn->in.hdr->itt));
|
|
||||||
offset += sizeof(struct cpl_iscsi_hdr_norss);
|
|
||||||
}
|
|
||||||
|
|
||||||
rc = read_pdu_skb(conn, skb, offset, offloaded);
|
|
||||||
if (rc < 0)
|
|
||||||
return rc;
|
|
||||||
else
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* pdu transmit, interact with libiscsi_tcp
|
|
||||||
*/
|
|
||||||
static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
|
|
||||||
{
|
|
||||||
u8 submode = 0;
|
|
||||||
|
|
||||||
if (hcrc)
|
|
||||||
submode |= 1;
|
|
||||||
if (dcrc)
|
|
||||||
submode |= 2;
|
|
||||||
skb_ulp_mode(skb) = (ULP_MODE_ISCSI << 4) | submode;
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_conn_cleanup_task(struct iscsi_task *task)
|
|
||||||
{
|
|
||||||
struct cxgb3i_task_data *tdata = task->dd_data +
|
|
||||||
sizeof(struct iscsi_tcp_task);
|
|
||||||
|
|
||||||
/* never reached the xmit task callout */
|
|
||||||
if (tdata->skb)
|
|
||||||
__kfree_skb(tdata->skb);
|
|
||||||
memset(tdata, 0, sizeof(struct cxgb3i_task_data));
|
|
||||||
|
|
||||||
/* MNC - Do we need a check in case this is called but
|
|
||||||
* cxgb3i_conn_alloc_pdu has never been called on the task */
|
|
||||||
cxgb3i_release_itt(task, task->hdr_itt);
|
|
||||||
iscsi_tcp_cleanup_task(task);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
|
|
||||||
unsigned int offset, unsigned int *off,
|
|
||||||
struct scatterlist **sgp)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
struct scatterlist *sg;
|
|
||||||
|
|
||||||
for_each_sg(sgl, sg, sgcnt, i) {
|
|
||||||
if (offset < sg->length) {
|
|
||||||
*off = offset;
|
|
||||||
*sgp = sg;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
offset -= sg->length;
|
|
||||||
}
|
|
||||||
return -EFAULT;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
|
|
||||||
unsigned int dlen, skb_frag_t *frags,
|
|
||||||
int frag_max)
|
|
||||||
{
|
|
||||||
unsigned int datalen = dlen;
|
|
||||||
unsigned int sglen = sg->length - sgoffset;
|
|
||||||
struct page *page = sg_page(sg);
|
|
||||||
int i;
|
|
||||||
|
|
||||||
i = 0;
|
|
||||||
do {
|
|
||||||
unsigned int copy;
|
|
||||||
|
|
||||||
if (!sglen) {
|
|
||||||
sg = sg_next(sg);
|
|
||||||
if (!sg) {
|
|
||||||
cxgb3i_log_error("%s, sg NULL, len %u/%u.\n",
|
|
||||||
__func__, datalen, dlen);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
sgoffset = 0;
|
|
||||||
sglen = sg->length;
|
|
||||||
page = sg_page(sg);
|
|
||||||
|
|
||||||
}
|
|
||||||
copy = min(datalen, sglen);
|
|
||||||
if (i && page == frags[i - 1].page &&
|
|
||||||
sgoffset + sg->offset ==
|
|
||||||
frags[i - 1].page_offset + frags[i - 1].size) {
|
|
||||||
frags[i - 1].size += copy;
|
|
||||||
} else {
|
|
||||||
if (i >= frag_max) {
|
|
||||||
cxgb3i_log_error("%s, too many pages %u, "
|
|
||||||
"dlen %u.\n", __func__,
|
|
||||||
frag_max, dlen);
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
frags[i].page = page;
|
|
||||||
frags[i].page_offset = sg->offset + sgoffset;
|
|
||||||
frags[i].size = copy;
|
|
||||||
i++;
|
|
||||||
}
|
|
||||||
datalen -= copy;
|
|
||||||
sgoffset += copy;
|
|
||||||
sglen -= copy;
|
|
||||||
} while (datalen);
|
|
||||||
|
|
||||||
return i;
|
|
||||||
}
|
|
||||||
|
|
||||||
int cxgb3i_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
|
|
||||||
{
|
|
||||||
struct iscsi_conn *conn = task->conn;
|
|
||||||
struct iscsi_tcp_task *tcp_task = task->dd_data;
|
|
||||||
struct cxgb3i_task_data *tdata = task->dd_data + sizeof(*tcp_task);
|
|
||||||
struct scsi_cmnd *sc = task->sc;
|
|
||||||
int headroom = SKB_TX_PDU_HEADER_LEN;
|
|
||||||
|
|
||||||
tcp_task->dd_data = tdata;
|
|
||||||
task->hdr = NULL;
|
|
||||||
|
|
||||||
/* write command, need to send data pdus */
|
|
||||||
if (skb_extra_headroom && (opcode == ISCSI_OP_SCSI_DATA_OUT ||
|
|
||||||
(opcode == ISCSI_OP_SCSI_CMD &&
|
|
||||||
(scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
|
|
||||||
headroom += min(skb_extra_headroom, conn->max_xmit_dlength);
|
|
||||||
|
|
||||||
tdata->skb = alloc_skb(TX_HEADER_LEN + headroom, GFP_ATOMIC);
|
|
||||||
if (!tdata->skb)
|
|
||||||
return -ENOMEM;
|
|
||||||
skb_reserve(tdata->skb, TX_HEADER_LEN);
|
|
||||||
|
|
||||||
cxgb3i_tx_debug("task 0x%p, opcode 0x%x, skb 0x%p.\n",
|
|
||||||
task, opcode, tdata->skb);
|
|
||||||
|
|
||||||
task->hdr = (struct iscsi_hdr *)tdata->skb->data;
|
|
||||||
task->hdr_max = SKB_TX_PDU_HEADER_LEN;
|
|
||||||
|
|
||||||
/* data_out uses scsi_cmd's itt */
|
|
||||||
if (opcode != ISCSI_OP_SCSI_DATA_OUT)
|
|
||||||
cxgb3i_reserve_itt(task, &task->hdr->itt);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
int cxgb3i_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
|
|
||||||
unsigned int count)
|
|
||||||
{
|
|
||||||
struct iscsi_conn *conn = task->conn;
|
|
||||||
struct iscsi_tcp_task *tcp_task = task->dd_data;
|
|
||||||
struct cxgb3i_task_data *tdata = tcp_task->dd_data;
|
|
||||||
struct sk_buff *skb = tdata->skb;
|
|
||||||
unsigned int datalen = count;
|
|
||||||
int i, padlen = iscsi_padding(count);
|
|
||||||
struct page *pg;
|
|
||||||
|
|
||||||
cxgb3i_tx_debug("task 0x%p,0x%p, offset %u, count %u, skb 0x%p.\n",
|
|
||||||
task, task->sc, offset, count, skb);
|
|
||||||
|
|
||||||
skb_put(skb, task->hdr_len);
|
|
||||||
tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
|
|
||||||
if (!count)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
if (task->sc) {
|
|
||||||
struct scsi_data_buffer *sdb = scsi_out(task->sc);
|
|
||||||
struct scatterlist *sg = NULL;
|
|
||||||
int err;
|
|
||||||
|
|
||||||
tdata->offset = offset;
|
|
||||||
tdata->count = count;
|
|
||||||
err = sgl_seek_offset(sdb->table.sgl, sdb->table.nents,
|
|
||||||
tdata->offset, &tdata->sgoffset, &sg);
|
|
||||||
if (err < 0) {
|
|
||||||
cxgb3i_log_warn("tpdu, sgl %u, bad offset %u/%u.\n",
|
|
||||||
sdb->table.nents, tdata->offset,
|
|
||||||
sdb->length);
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
|
|
||||||
tdata->frags, MAX_PDU_FRAGS);
|
|
||||||
if (err < 0) {
|
|
||||||
cxgb3i_log_warn("tpdu, sgl %u, bad offset %u + %u.\n",
|
|
||||||
sdb->table.nents, tdata->offset,
|
|
||||||
tdata->count);
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
tdata->nr_frags = err;
|
|
||||||
|
|
||||||
if (tdata->nr_frags > MAX_SKB_FRAGS ||
|
|
||||||
(padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
|
|
||||||
char *dst = skb->data + task->hdr_len;
|
|
||||||
skb_frag_t *frag = tdata->frags;
|
|
||||||
|
|
||||||
/* data fits in the skb's headroom */
|
|
||||||
for (i = 0; i < tdata->nr_frags; i++, frag++) {
|
|
||||||
char *src = kmap_atomic(frag->page,
|
|
||||||
KM_SOFTIRQ0);
|
|
||||||
|
|
||||||
memcpy(dst, src+frag->page_offset, frag->size);
|
|
||||||
dst += frag->size;
|
|
||||||
kunmap_atomic(src, KM_SOFTIRQ0);
|
|
||||||
}
|
|
||||||
if (padlen) {
|
|
||||||
memset(dst, 0, padlen);
|
|
||||||
padlen = 0;
|
|
||||||
}
|
|
||||||
skb_put(skb, count + padlen);
|
|
||||||
} else {
|
|
||||||
/* data fit into frag_list */
|
|
||||||
for (i = 0; i < tdata->nr_frags; i++)
|
|
||||||
get_page(tdata->frags[i].page);
|
|
||||||
|
|
||||||
memcpy(skb_shinfo(skb)->frags, tdata->frags,
|
|
||||||
sizeof(skb_frag_t) * tdata->nr_frags);
|
|
||||||
skb_shinfo(skb)->nr_frags = tdata->nr_frags;
|
|
||||||
skb->len += count;
|
|
||||||
skb->data_len += count;
|
|
||||||
skb->truesize += count;
|
|
||||||
}
|
|
||||||
|
|
||||||
} else {
|
|
||||||
pg = virt_to_page(task->data);
|
|
||||||
|
|
||||||
get_page(pg);
|
|
||||||
skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
|
|
||||||
count);
|
|
||||||
skb->len += count;
|
|
||||||
skb->data_len += count;
|
|
||||||
skb->truesize += count;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (padlen) {
|
|
||||||
i = skb_shinfo(skb)->nr_frags;
|
|
||||||
get_page(pad_page);
|
|
||||||
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, pad_page, 0,
|
|
||||||
padlen);
|
|
||||||
|
|
||||||
skb->data_len += padlen;
|
|
||||||
skb->truesize += padlen;
|
|
||||||
skb->len += padlen;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
int cxgb3i_conn_xmit_pdu(struct iscsi_task *task)
|
|
||||||
{
|
|
||||||
struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
|
|
||||||
struct cxgb3i_conn *cconn = tcp_conn->dd_data;
|
|
||||||
struct iscsi_tcp_task *tcp_task = task->dd_data;
|
|
||||||
struct cxgb3i_task_data *tdata = tcp_task->dd_data;
|
|
||||||
struct sk_buff *skb = tdata->skb;
|
|
||||||
unsigned int datalen;
|
|
||||||
int err;
|
|
||||||
|
|
||||||
if (!skb)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
datalen = skb->data_len;
|
|
||||||
tdata->skb = NULL;
|
|
||||||
err = cxgb3i_c3cn_send_pdus(cconn->cep->c3cn, skb);
|
|
||||||
if (err > 0) {
|
|
||||||
int pdulen = err;
|
|
||||||
|
|
||||||
cxgb3i_tx_debug("task 0x%p, skb 0x%p, len %u/%u, rv %d.\n",
|
|
||||||
task, skb, skb->len, skb->data_len, err);
|
|
||||||
|
|
||||||
if (task->conn->hdrdgst_en)
|
|
||||||
pdulen += ISCSI_DIGEST_SIZE;
|
|
||||||
if (datalen && task->conn->datadgst_en)
|
|
||||||
pdulen += ISCSI_DIGEST_SIZE;
|
|
||||||
|
|
||||||
task->conn->txdata_octets += pdulen;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (err == -EAGAIN || err == -ENOBUFS) {
|
|
||||||
/* reset skb to send when we are called again */
|
|
||||||
tdata->skb = skb;
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
|
|
||||||
kfree_skb(skb);
|
|
||||||
cxgb3i_tx_debug("itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
|
|
||||||
task->itt, skb, skb->len, skb->data_len, err);
|
|
||||||
iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
|
|
||||||
iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
|
|
||||||
return err;
|
|
||||||
}
|
|
||||||
|
|
||||||
int cxgb3i_pdu_init(void)
|
|
||||||
{
|
|
||||||
if (SKB_TX_HEADROOM > (512 * MAX_SKB_FRAGS))
|
|
||||||
skb_extra_headroom = SKB_TX_HEADROOM;
|
|
||||||
pad_page = alloc_page(GFP_KERNEL);
|
|
||||||
if (!pad_page)
|
|
||||||
return -ENOMEM;
|
|
||||||
memset(page_address(pad_page), 0, PAGE_SIZE);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_pdu_cleanup(void)
|
|
||||||
{
|
|
||||||
if (pad_page) {
|
|
||||||
__free_page(pad_page);
|
|
||||||
pad_page = NULL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn)
|
|
||||||
{
|
|
||||||
struct sk_buff *skb;
|
|
||||||
unsigned int read = 0;
|
|
||||||
struct iscsi_conn *conn = c3cn->user_data;
|
|
||||||
int err = 0;
|
|
||||||
|
|
||||||
cxgb3i_rx_debug("cn 0x%p.\n", c3cn);
|
|
||||||
|
|
||||||
read_lock(&c3cn->callback_lock);
|
|
||||||
if (unlikely(!conn || conn->suspend_rx)) {
|
|
||||||
cxgb3i_rx_debug("conn 0x%p, id %d, suspend_rx %lu!\n",
|
|
||||||
conn, conn ? conn->id : 0xFF,
|
|
||||||
conn ? conn->suspend_rx : 0xFF);
|
|
||||||
read_unlock(&c3cn->callback_lock);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
skb = skb_peek(&c3cn->receive_queue);
|
|
||||||
while (!err && skb) {
|
|
||||||
__skb_unlink(skb, &c3cn->receive_queue);
|
|
||||||
read += skb_rx_pdulen(skb);
|
|
||||||
cxgb3i_rx_debug("conn 0x%p, cn 0x%p, rx skb 0x%p, pdulen %u.\n",
|
|
||||||
conn, c3cn, skb, skb_rx_pdulen(skb));
|
|
||||||
err = cxgb3i_conn_read_pdu_skb(conn, skb);
|
|
||||||
__kfree_skb(skb);
|
|
||||||
skb = skb_peek(&c3cn->receive_queue);
|
|
||||||
}
|
|
||||||
read_unlock(&c3cn->callback_lock);
|
|
||||||
c3cn->copied_seq += read;
|
|
||||||
cxgb3i_c3cn_rx_credits(c3cn, read);
|
|
||||||
conn->rxdata_octets += read;
|
|
||||||
|
|
||||||
if (err) {
|
|
||||||
cxgb3i_log_info("conn 0x%p rx failed err %d.\n", conn, err);
|
|
||||||
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_conn_tx_open(struct s3_conn *c3cn)
|
|
||||||
{
|
|
||||||
struct iscsi_conn *conn = c3cn->user_data;
|
|
||||||
|
|
||||||
cxgb3i_tx_debug("cn 0x%p.\n", c3cn);
|
|
||||||
if (conn) {
|
|
||||||
cxgb3i_tx_debug("cn 0x%p, cid %d.\n", c3cn, conn->id);
|
|
||||||
iscsi_conn_queue_work(conn);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
void cxgb3i_conn_closing(struct s3_conn *c3cn)
|
|
||||||
{
|
|
||||||
struct iscsi_conn *conn;
|
|
||||||
|
|
||||||
read_lock(&c3cn->callback_lock);
|
|
||||||
conn = c3cn->user_data;
|
|
||||||
if (conn && c3cn->state != C3CN_STATE_ESTABLISHED)
|
|
||||||
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
|
|
||||||
read_unlock(&c3cn->callback_lock);
|
|
||||||
}
|
|
||||||
@ -1,59 +0,0 @@
|
|||||||
/*
|
|
||||||
* cxgb3i_ulp2.h: Chelsio S3xx iSCSI driver.
|
|
||||||
*
|
|
||||||
* Copyright (c) 2008 Chelsio Communications, Inc.
|
|
||||||
*
|
|
||||||
* This program 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.
|
|
||||||
*
|
|
||||||
* Written by: Karen Xie (kxie@chelsio.com)
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __CXGB3I_ULP2_PDU_H__
|
|
||||||
#define __CXGB3I_ULP2_PDU_H__
|
|
||||||
|
|
||||||
struct cpl_iscsi_hdr_norss {
|
|
||||||
union opcode_tid ot;
|
|
||||||
u16 pdu_len_ddp;
|
|
||||||
u16 len;
|
|
||||||
u32 seq;
|
|
||||||
u16 urg;
|
|
||||||
u8 rsvd;
|
|
||||||
u8 status;
|
|
||||||
};
|
|
||||||
|
|
||||||
struct cpl_rx_data_ddp_norss {
|
|
||||||
union opcode_tid ot;
|
|
||||||
u16 urg;
|
|
||||||
u16 len;
|
|
||||||
u32 seq;
|
|
||||||
u32 nxt_seq;
|
|
||||||
u32 ulp_crc;
|
|
||||||
u32 ddp_status;
|
|
||||||
};
|
|
||||||
|
|
||||||
#define RX_DDP_STATUS_IPP_SHIFT 27 /* invalid pagepod */
|
|
||||||
#define RX_DDP_STATUS_TID_SHIFT 26 /* tid mismatch */
|
|
||||||
#define RX_DDP_STATUS_COLOR_SHIFT 25 /* color mismatch */
|
|
||||||
#define RX_DDP_STATUS_OFFSET_SHIFT 24 /* offset mismatch */
|
|
||||||
#define RX_DDP_STATUS_ULIMIT_SHIFT 23 /* ulimit error */
|
|
||||||
#define RX_DDP_STATUS_TAG_SHIFT 22 /* tag mismatch */
|
|
||||||
#define RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */
|
|
||||||
#define RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */
|
|
||||||
#define RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */
|
|
||||||
#define RX_DDP_STATUS_PPP_SHIFT 18 /* pagepod parity error */
|
|
||||||
#define RX_DDP_STATUS_LLIMIT_SHIFT 17 /* llimit error */
|
|
||||||
#define RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */
|
|
||||||
#define RX_DDP_STATUS_PMM_SHIFT 15 /* pagepod mismatch */
|
|
||||||
|
|
||||||
#define ULP2_FLAG_DATA_READY 0x1
|
|
||||||
#define ULP2_FLAG_DATA_DDPED 0x2
|
|
||||||
#define ULP2_FLAG_HCRC_ERROR 0x10
|
|
||||||
#define ULP2_FLAG_DCRC_ERROR 0x20
|
|
||||||
#define ULP2_FLAG_PAD_ERROR 0x40
|
|
||||||
|
|
||||||
void cxgb3i_conn_closing(struct s3_conn *c3cn);
|
|
||||||
void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn);
|
|
||||||
void cxgb3i_conn_tx_open(struct s3_conn *c3cn);
|
|
||||||
#endif
|
|
||||||
@ -1 +1,2 @@
|
|||||||
|
source "drivers/scsi/cxgbi/cxgb3i/Kconfig"
|
||||||
source "drivers/scsi/cxgbi/cxgb4i/Kconfig"
|
source "drivers/scsi/cxgbi/cxgb4i/Kconfig"
|
||||||
|
|||||||
@ -1 +1,2 @@
|
|||||||
|
obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libcxgbi.o cxgb3i/
|
||||||
obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libcxgbi.o cxgb4i/
|
obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libcxgbi.o cxgb4i/
|
||||||
|
|||||||
@ -1,4 +1,3 @@
|
|||||||
EXTRA_CFLAGS += -I$(srctree)/drivers/net/cxgb3
|
EXTRA_CFLAGS += -I$(srctree)/drivers/net/cxgb3
|
||||||
|
|
||||||
cxgb3i-y := cxgb3i_init.o cxgb3i_iscsi.o cxgb3i_pdu.o cxgb3i_offload.o cxgb3i_ddp.o
|
|
||||||
obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o
|
obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o
|
||||||
@ -1,7 +1,7 @@
|
|||||||
config SCSI_CXGB3_ISCSI
|
config SCSI_CXGB3_ISCSI
|
||||||
tristate "Chelsio S3xx iSCSI support"
|
tristate "Chelsio T3 iSCSI support"
|
||||||
depends on CHELSIO_T3_DEPENDS
|
depends on CHELSIO_T3_DEPENDS
|
||||||
select CHELSIO_T3
|
select CHELSIO_T3
|
||||||
select SCSI_ISCSI_ATTRS
|
select SCSI_ISCSI_ATTRS
|
||||||
---help---
|
---help---
|
||||||
This driver supports iSCSI offload for the Chelsio S3 series devices.
|
This driver supports iSCSI offload for the Chelsio T3 devices.
|
||||||
1432
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
Normal file
1432
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
Normal file
File diff suppressed because it is too large
Load Diff
51
drivers/scsi/cxgbi/cxgb3i/cxgb3i.h
Normal file
51
drivers/scsi/cxgbi/cxgb3i/cxgb3i.h
Normal file
@ -0,0 +1,51 @@
|
|||||||
|
/*
|
||||||
|
* cxgb3i.h: Chelsio S3xx iSCSI driver.
|
||||||
|
*
|
||||||
|
* Copyright (c) 2008 Chelsio Communications, Inc.
|
||||||
|
*
|
||||||
|
* This program 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.
|
||||||
|
*
|
||||||
|
* Written by: Karen Xie (kxie@chelsio.com)
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __CXGB3I_H__
|
||||||
|
#define __CXGB3I_H__
|
||||||
|
|
||||||
|
#define CXGB3I_SCSI_HOST_QDEPTH 1024
|
||||||
|
#define CXGB3I_MAX_LUN 512
|
||||||
|
#define ISCSI_PDU_NONPAYLOAD_MAX \
|
||||||
|
(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE)
|
||||||
|
|
||||||
|
/*for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
|
||||||
|
#define CXGB3I_TX_HEADER_LEN \
|
||||||
|
(sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr))
|
||||||
|
|
||||||
|
extern cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
|
||||||
|
|
||||||
|
#define cxgb3i_get_private_ipv4addr(ndev) \
|
||||||
|
(((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr)
|
||||||
|
#define cxgb3i_set_private_ipv4addr(ndev, addr) \
|
||||||
|
(((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr
|
||||||
|
|
||||||
|
struct cpl_iscsi_hdr_norss {
|
||||||
|
union opcode_tid ot;
|
||||||
|
u16 pdu_len_ddp;
|
||||||
|
u16 len;
|
||||||
|
u32 seq;
|
||||||
|
u16 urg;
|
||||||
|
u8 rsvd;
|
||||||
|
u8 status;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct cpl_rx_data_ddp_norss {
|
||||||
|
union opcode_tid ot;
|
||||||
|
u16 urg;
|
||||||
|
u16 len;
|
||||||
|
u32 seq;
|
||||||
|
u32 nxt_seq;
|
||||||
|
u32 ulp_crc;
|
||||||
|
u32 ddp_status;
|
||||||
|
};
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue
Block a user