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cxgb3i: add iSCSI DDP support

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Add iSCSI DDP support in cxgb3i driver
using common iSCSI DDP Page Pod Manager.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Varun Prakash 2016-07-21 22:57:17 +05:30 committed by David S. Miller
parent 71f7a00bd1
commit b75113b12c
1 changed files with 118 additions and 1 deletions
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119
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
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@ -1076,6 +1076,70 @@ static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
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(IPPOD_SIZE >> 5) |
V_ULPTX_NFLITS((IPPOD_SIZE >> 3) + 1));
}
static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
{
return ((struct t3cdev *)cdev->lldev)->ulp_iscsi;
}
static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
struct cxgbi_task_tag_info *ttinfo)
{
unsigned int idx = ttinfo->idx;
unsigned int npods = ttinfo->npods;
struct scatterlist *sg = ttinfo->sgl;
struct cxgbi_pagepod *ppod;
struct ulp_mem_io *req;
unsigned int sg_off;
unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
int i;
for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) {
struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) +
IPPOD_SIZE, 0, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
ulp_mem_io_set_hdr(skb, pm_addr);
req = (struct ulp_mem_io *)skb->head;
ppod = (struct cxgbi_pagepod *)(req + 1);
sg_off = i * PPOD_PAGES_MAX;
cxgbi_ddp_set_one_ppod(ppod, ttinfo, &sg,
&sg_off);
skb->priority = CPL_PRIORITY_CONTROL;
cxgb3_ofld_send(ppm->lldev, skb);
}
return 0;
}
static void ddp_clear_map(struct cxgbi_device *cdev, struct cxgbi_ppm *ppm,
struct cxgbi_task_tag_info *ttinfo)
{
unsigned int idx = ttinfo->idx;
unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
unsigned int npods = ttinfo->npods;
int i;
log_debug(1 << CXGBI_DBG_DDP,
"cdev 0x%p, clear idx %u, npods %u.\n",
cdev, idx, npods);
for (i = 0; i < npods; i++, idx++, pm_addr += IPPOD_SIZE) {
struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) +
IPPOD_SIZE, 0, GFP_ATOMIC);
if (!skb) {
pr_err("cdev 0x%p, clear ddp, %u,%d/%u, skb OOM.\n",
cdev, idx, i, npods);
continue;
}
ulp_mem_io_set_hdr(skb, pm_addr);
skb->priority = CPL_PRIORITY_CONTROL;
cxgb3_ofld_send(ppm->lldev, skb);
}
}
static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk,
@ -1144,14 +1208,67 @@ static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
}
/**
* ddp_init - initialize the cxgb3 adapter's ddp resource
* cxgb3i_ddp_init - initialize the cxgb3 adapter's ddp resource
* @cdev: cxgb3i adapter
* initialize the ddp pagepod manager for a given adapter
*/
static int cxgb3i_ddp_init(struct cxgbi_device *cdev)
{
struct t3cdev *tdev = (struct t3cdev *)cdev->lldev;
struct net_device *ndev = cdev->ports[0];
struct cxgbi_tag_format tformat;
unsigned int ppmax, tagmask = 0;
struct ulp_iscsi_info uinfo;
int i, err;
err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
if (err < 0) {
pr_err("%s, failed to get iscsi param %d.\n",
ndev->name, err);
return err;
}
if (uinfo.llimit >= uinfo.ulimit) {
pr_warn("T3 %s, iscsi NOT enabled %u ~ %u!\n",
ndev->name, uinfo.llimit, uinfo.ulimit);
return -EACCES;
}
ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT;
pr_info("T3 %s: 0x%x~0x%x, 0x%x, tagmask 0x%x -> 0x%x.\n",
ndev->name, uinfo.llimit, uinfo.ulimit, ppmax, uinfo.tagmask,
tagmask);
memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
for (i = 0; i < 4; i++)
tformat.pgsz_order[i] = uinfo.pgsz_factor[i];
cxgbi_tagmask_check(tagmask, &tformat);
cxgbi_ddp_ppm_setup(&tdev->ulp_iscsi, cdev, &tformat, ppmax,
uinfo.llimit, uinfo.llimit, 0);
if (!(cdev->flags & CXGBI_FLAG_DDP_OFF)) {
uinfo.tagmask = tagmask;
uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT);
err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo);
if (err < 0) {
pr_err("T3 %s fail to set iscsi param %d.\n",
ndev->name, err);
cdev->flags |= CXGBI_FLAG_DDP_OFF;
}
err = 0;
}
cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
cdev->csk_ddp_set_map = ddp_set_map;
cdev->csk_ddp_clear_map = ddp_clear_map;
cdev->cdev2ppm = cdev2ppm;
cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
uinfo.max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
uinfo.max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
return 0;
}