[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>

1 files changed, 0 insertions, 773 deletions

diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.c b/drivers/scsi/cxgb3i/cxgb3i_ddp.c
deleted file mode 100644
index be0e23042c76..000000000000
--- a/drivers/scsi/cxgb3i/cxgb3i_ddp.c
+++ /dev/null
@@ -1,773 +0,0 @@
-/*
- * cxgb3i_ddp.c: 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)
- */
-
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/scatterlist.h>
-
-/* from cxgb3 LLD */
-#include "common.h"
-#include "t3_cpl.h"
-#include "t3cdev.h"
-#include "cxgb3_ctl_defs.h"
-#include "cxgb3_offload.h"
-#include "firmware_exports.h"
-
-#include "cxgb3i_ddp.h"
-
-#define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt)
-#define ddp_log_warn(fmt...)  printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt)
-#define ddp_log_info(fmt...)  printk(KERN_INFO "cxgb3i_ddp: " fmt)
-
-#ifdef __DEBUG_CXGB3I_DDP__
-#define ddp_log_debug(fmt, args...) \
-        printk(KERN_INFO "cxgb3i_ddp: %s - " fmt, __func__ , ## args)
-#else
-#define ddp_log_debug(fmt...)
-#endif
-
-/*
- * iSCSI Direct Data Placement
- *
- * T3 h/w can directly place the iSCSI Data-In or Data-Out PDU's payload into
- * pre-posted final destination host-memory buffers based on the Initiator
- * Task Tag (ITT) in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
- *
- * The host memory address is programmed into h/w in the format of pagepod
- * entries.
- * The location of the pagepod entry is encoded into ddp tag which is used or
- * is the base for ITT/TTT.
- */
-
-#define DDP_PGIDX_MAX           4
-#define DDP_THRESHOLD   2048
-static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4};
-static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
-static unsigned char page_idx = DDP_PGIDX_MAX;
-
-/*
- * functions to program the pagepod in h/w
- */
-static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
-{
-        struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head;
-
-        req->wr.wr_lo = 0;
-        req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS));
-        req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) |
-                                   V_ULPTX_CMD(ULP_MEM_WRITE));
-        req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) |
-                         V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1));
-}
-
-static int set_ddp_map(struct cxgb3i_ddp_info *ddp, struct pagepod_hdr *hdr,
-                       unsigned int idx, unsigned int npods,
-                       struct cxgb3i_gather_list *gl)
-{
-        unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
-        int i;
-
-        for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
-                struct sk_buff *skb = ddp->gl_skb[idx];
-                struct pagepod *ppod;
-                int j, pidx;
-
-                /* hold on to the skb until we clear the ddp mapping */
-                skb_get(skb);
-
-                ulp_mem_io_set_hdr(skb, pm_addr);
-                ppod = (struct pagepod *)
-                       (skb->head + sizeof(struct ulp_mem_io));
-                memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod));
-                for (pidx = 4 * i, j = 0; j < 5; ++j, ++pidx)
-                        ppod->addr[j] = pidx < gl->nelem ?
-                                     cpu_to_be64(gl->phys_addr[pidx]) : 0UL;
-
-                skb->priority = CPL_PRIORITY_CONTROL;
-                cxgb3_ofld_send(ddp->tdev, skb);
-        }
-        return 0;
-}
-
-static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag,
-                         unsigned int idx, unsigned int npods)
-{
-        unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
-        int i;
-
-        for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
-                struct sk_buff *skb = ddp->gl_skb[idx];
-
-                if (!skb) {
-                        ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n",
-                                        tag, idx, i, npods);
-                        continue;
-                }
-                ddp->gl_skb[idx] = NULL;
-                memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE);
-                ulp_mem_io_set_hdr(skb, pm_addr);
-                skb->priority = CPL_PRIORITY_CONTROL;
-                cxgb3_ofld_send(ddp->tdev, skb);
-        }
-}
-
-static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp,
-                                          unsigned int start, unsigned int max,
-                                          unsigned int count,
-                                          struct cxgb3i_gather_list *gl)
-{
-        unsigned int i, j, k;
-
-        /* not enough entries */
-        if ((max - start) < count)
-                return -EBUSY;
-
-        max -= count;
-        spin_lock(&ddp->map_lock);
-        for (i = start; i < max;) {
-                for (j = 0, k = i; j < count; j++, k++) {
-                        if (ddp->gl_map[k])
-                                break;
-                }
-                if (j == count) {
-                        for (j = 0, k = i; j < count; j++, k++)
-                                ddp->gl_map[k] = gl;
-                        spin_unlock(&ddp->map_lock);
-                        return i;
-                }
-                i += j + 1;
-        }
-        spin_unlock(&ddp->map_lock);
-        return -EBUSY;
-}
-
-static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp,
-                                      int start, int count)
-{
-        spin_lock(&ddp->map_lock);
-        memset(&ddp->gl_map[start], 0,
-               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);
-}