2008-12-10 06:15:32 +08:00
|
|
|
/*
|
|
|
|
* 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/skbuff.h>
|
2009-01-06 01:21:11 +08:00
|
|
|
#include <linux/scatterlist.h>
|
2008-12-10 06:15:32 +08:00
|
|
|
|
|
|
|
/* 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 DRV_MODULE_NAME "cxgb3i_ddp"
|
|
|
|
#define DRV_MODULE_VERSION "1.0.0"
|
|
|
|
#define DRV_MODULE_RELDATE "Dec. 1, 2008"
|
|
|
|
|
|
|
|
static char version[] =
|
|
|
|
"Chelsio S3xx iSCSI DDP " DRV_MODULE_NAME
|
|
|
|
" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
|
|
|
|
MODULE_DESCRIPTION("cxgb3i ddp pagepod manager");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION(DRV_MODULE_VERSION);
|
|
|
|
|
|
|
|
#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;
|
|
|
|
|
|
|
|
static LIST_HEAD(cxgb3i_ddp_list);
|
|
|
|
static DEFINE_RWLOCK(cxgb3i_ddp_rwlock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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 int clear_ddp_map(struct cxgb3i_ddp_info *ddp, 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];
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp,
|
|
|
|
int start, int max, int count,
|
|
|
|
struct cxgb3i_gather_list *gl)
|
|
|
|
{
|
|
|
|
unsigned int i, j;
|
|
|
|
|
|
|
|
spin_lock(&ddp->map_lock);
|
|
|
|
for (i = start; i <= max;) {
|
|
|
|
for (j = 0; j < count; j++) {
|
|
|
|
if (ddp->gl_map[i + j])
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (j == count) {
|
|
|
|
for (j = 0; j < count; j++)
|
|
|
|
ddp->gl_map[i + j] = 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;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_ddp_find_page_index);
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_ddp_make_gl);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_ddp_release_gl);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cxgb3i_ddp_tag_reserve - set up ddp for a data transfer
|
|
|
|
* @tdev: t3cdev adapter
|
|
|
|
* @tid: connection id
|
|
|
|
* @tformat: tag format
|
|
|
|
* @tagp: the s/w tag, if ddp setup is successful, it 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, idx_max;
|
|
|
|
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;
|
|
|
|
idx_max = ddp->nppods - npods + 1;
|
|
|
|
|
|
|
|
if (ddp->idx_last == ddp->nppods)
|
|
|
|
idx = ddp_find_unused_entries(ddp, 0, idx_max, npods, gl);
|
|
|
|
else {
|
|
|
|
idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
|
|
|
|
idx_max, npods, gl);
|
|
|
|
if (idx < 0 && ddp->idx_last >= npods)
|
|
|
|
idx = ddp_find_unused_entries(ddp, 0,
|
|
|
|
ddp->idx_last - npods + 1,
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_ddp_tag_reserve);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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) {
|
|
|
|
ddp_log_error("release ddp 0x%x, idx 0x%x, gl NULL.\n",
|
|
|
|
tag, idx);
|
|
|
|
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, 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);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_ddp_tag_release);
|
|
|
|
|
|
|
|
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));
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_host_pagesize);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_pagesize);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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));
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_digest);
|
|
|
|
|
|
|
|
static int ddp_init(struct t3cdev *tdev)
|
|
|
|
{
|
|
|
|
struct cxgb3i_ddp_info *ddp;
|
|
|
|
struct ulp_iscsi_info uinfo;
|
|
|
|
unsigned int ppmax, bits;
|
|
|
|
int i, err;
|
|
|
|
static int vers_printed;
|
|
|
|
|
|
|
|
if (!vers_printed) {
|
|
|
|
printk(KERN_INFO "%s", version);
|
|
|
|
vers_printed = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
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 err;
|
|
|
|
}
|
|
|
|
|
|
|
|
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 0;
|
|
|
|
}
|
|
|
|
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);
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
/* add to the list */
|
|
|
|
write_lock(&cxgb3i_ddp_rwlock);
|
|
|
|
list_add_tail(&ddp->list, &cxgb3i_ddp_list);
|
|
|
|
write_unlock(&cxgb3i_ddp_rwlock);
|
|
|
|
|
|
|
|
ddp_log_info("nppods %u (0x%x ~ 0x%x), bits %u, mask 0x%x,0x%x "
|
|
|
|
"pkt %u,%u.\n",
|
|
|
|
ppmax, ddp->llimit, ddp->ulimit, ddp->idx_bits,
|
|
|
|
ddp->idx_mask, ddp->rsvd_tag_mask,
|
|
|
|
ddp->max_txsz, ddp->max_rxsz);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
free_ddp_map:
|
|
|
|
cxgb3i_free_big_mem(ddp);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cxgb3i_adapter_ddp_init - initialize the adapter's ddp resource
|
|
|
|
* @tdev: t3cdev adapter
|
|
|
|
* @tformat: tag format
|
|
|
|
* @txsz: max tx pkt size, filled in by this func.
|
|
|
|
* @rxsz: max rx pkt size, filled in by this func.
|
|
|
|
* initialize the ddp pagepod manager for a given adapter if needed and
|
|
|
|
* setup the tag format for a given iscsi entity
|
|
|
|
*/
|
|
|
|
int cxgb3i_adapter_ddp_init(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) {
|
|
|
|
int err = ddp_init(tdev);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
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 = ddp->max_txsz;
|
|
|
|
*rxsz = ddp->max_rxsz;
|
|
|
|
ddp_log_info("ddp max pkt size: %u, %u.\n",
|
|
|
|
ddp->max_txsz, ddp->max_rxsz);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_adapter_ddp_init);
|
|
|
|
|
|
|
|
static void ddp_release(struct cxgb3i_ddp_info *ddp)
|
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
struct t3cdev *tdev = ddp->tdev;
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
kfree(gl);
|
|
|
|
ddp_free_gl_skb(ddp, i, npods);
|
|
|
|
} else
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
cxgb3i_free_big_mem(ddp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cxgb3i_adapter_ddp_cleanup - release the adapter's ddp resource
|
|
|
|
* @tdev: t3cdev adapter
|
|
|
|
* release all the resource held by the ddp pagepod manager for a given
|
|
|
|
* adapter if needed
|
|
|
|
*/
|
|
|
|
void cxgb3i_adapter_ddp_cleanup(struct t3cdev *tdev)
|
|
|
|
{
|
|
|
|
struct cxgb3i_ddp_info *ddp;
|
|
|
|
|
|
|
|
/* remove from the list */
|
|
|
|
write_lock(&cxgb3i_ddp_rwlock);
|
|
|
|
list_for_each_entry(ddp, &cxgb3i_ddp_list, list) {
|
|
|
|
if (ddp->tdev == tdev) {
|
|
|
|
list_del(&ddp->list);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
write_unlock(&cxgb3i_ddp_rwlock);
|
|
|
|
|
|
|
|
if (ddp)
|
|
|
|
ddp_release(ddp);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgb3i_adapter_ddp_cleanup);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cxgb3i_ddp_init_module - module init entry point
|
|
|
|
* initialize any driver wide global data structures
|
|
|
|
*/
|
|
|
|
static int __init cxgb3i_ddp_init_module(void)
|
|
|
|
{
|
|
|
|
page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
|
|
|
|
ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n",
|
|
|
|
PAGE_SIZE, page_idx);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* cxgb3i_ddp_exit_module - module cleanup/exit entry point
|
|
|
|
* go through the ddp list and release any resource held.
|
|
|
|
*/
|
|
|
|
static void __exit cxgb3i_ddp_exit_module(void)
|
|
|
|
{
|
|
|
|
struct cxgb3i_ddp_info *ddp;
|
|
|
|
|
|
|
|
/* release all ddp manager if there is any */
|
|
|
|
write_lock(&cxgb3i_ddp_rwlock);
|
|
|
|
list_for_each_entry(ddp, &cxgb3i_ddp_list, list) {
|
|
|
|
list_del(&ddp->list);
|
|
|
|
ddp_release(ddp);
|
|
|
|
}
|
|
|
|
write_unlock(&cxgb3i_ddp_rwlock);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(cxgb3i_ddp_init_module);
|
|
|
|
module_exit(cxgb3i_ddp_exit_module);
|