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Date: Sat, 16 Jul 2016 22:49:18 +0530
From: Varun Prakash <varun@...lsio.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-scsi@...r.kernel.org,
target-devel@...r.kernel.org, nab@...ux-iscsi.org,
gerlitz.or@...il.com, swise@...ngridcomputing.com,
james.bottomley@...senpartnership.com, indranil@...lsio.com,
hariprasad@...lsio.com, varun@...lsio.com
Subject: [net-next v2 4/6] cxgb3i: add iSCSI DDP support
Add iSCSI DDP support in cxgb3i driver
using common iSCSI DDP Page Pod Manager.
Signed-off-by: Varun Prakash <varun@...lsio.com>
Reviewed-by: Steve Wise <swise@...ngridcomputing.com>
---
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c | 119 ++++++++++++++++++++++++++++++++++++-
1 file changed, 118 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
index fda0234..bb25ebb 100644
--- a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
+++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
@@ -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;
}
--
2.0.2
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