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 be0e230..0000000
--- 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);
-}