[ofa-general] [PATCH 6/16 v4] IB/mthca: Add checksum offload support

Eli Cohen eli at mellanox.co.il
Wed Jan 30 08:31:16 PST 2008


IB/mthca: Add checksum offload support

Signed-off-by: Eli Cohen <eli at mellnaox.co.il>
---
 drivers/infiniband/hw/mthca/mthca_cmd.c  |    3 +++
 drivers/infiniband/hw/mthca/mthca_cmd.h  |    1 +
 drivers/infiniband/hw/mthca/mthca_cq.c   |   14 +++++++++-----
 drivers/infiniband/hw/mthca/mthca_main.c |    6 ++++++
 drivers/infiniband/hw/mthca/mthca_qp.c   |    2 ++
 drivers/infiniband/hw/mthca/mthca_wqe.h  |   17 +++++++++--------
 6 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 6966f94..2a38926 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -1383,6 +1383,9 @@ int mthca_INIT_HCA(struct mthca_dev *dev,
 		MTHCA_PUT(inbox, param->uarc_base,   INIT_HCA_UAR_CTX_BASE_OFFSET);
 	}
 
+	if (dev->device_cap_flags & IB_DEVICE_IP_CSUM)
+		*(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(7 << 3);
+
 	err = mthca_cmd(dev, mailbox->dma, 0, 0, CMD_INIT_HCA, HZ, status);
 
 	mthca_free_mailbox(dev, mailbox);
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.h b/drivers/infiniband/hw/mthca/mthca_cmd.h
index 2f976f2..8928ca4 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.h
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.h
@@ -103,6 +103,7 @@ enum {
 	DEV_LIM_FLAG_RAW_IPV6           = 1 << 4,
 	DEV_LIM_FLAG_RAW_ETHER          = 1 << 5,
 	DEV_LIM_FLAG_SRQ                = 1 << 6,
+	DEV_LIM_FLAG_IPOIB_CSUM		= 1 << 7,
 	DEV_LIM_FLAG_BAD_PKEY_CNTR      = 1 << 8,
 	DEV_LIM_FLAG_BAD_QKEY_CNTR      = 1 << 9,
 	DEV_LIM_FLAG_MW                 = 1 << 16,
diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index 6bd9f13..4e6c75c 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -119,7 +119,8 @@ struct mthca_cqe {
 	__be32 my_qpn;
 	__be32 my_ee;
 	__be32 rqpn;
-	__be16 sl_g_mlpath;
+	u8	sl_ipok;
+	u8	g_mlpath;
 	__be16 rlid;
 	__be32 imm_etype_pkey_eec;
 	__be32 byte_cnt;
@@ -493,6 +494,7 @@ static inline int mthca_poll_one(struct mthca_dev *dev,
 	int is_send;
 	int free_cqe = 1;
 	int err = 0;
+	u16 checksum;
 
 	cqe = next_cqe_sw(cq);
 	if (!cqe)
@@ -635,12 +637,14 @@ static inline int mthca_poll_one(struct mthca_dev *dev,
 			break;
 		}
 		entry->slid 	   = be16_to_cpu(cqe->rlid);
-		entry->sl   	   = be16_to_cpu(cqe->sl_g_mlpath) >> 12;
+		entry->sl   	   = cqe->sl_ipok >> 4;
 		entry->src_qp 	   = be32_to_cpu(cqe->rqpn) & 0xffffff;
-		entry->dlid_path_bits = be16_to_cpu(cqe->sl_g_mlpath) & 0x7f;
+		entry->dlid_path_bits = cqe->g_mlpath & 0x7f;
 		entry->pkey_index  = be32_to_cpu(cqe->imm_etype_pkey_eec) >> 16;
-		entry->wc_flags   |= be16_to_cpu(cqe->sl_g_mlpath) & 0x80 ?
-					IB_WC_GRH : 0;
+		entry->wc_flags   |= cqe->g_mlpath & 0x80 ? IB_WC_GRH : 0;
+		checksum = (be32_to_cpu(cqe->rqpn) >> 24) |
+				((be32_to_cpu(cqe->my_ee) >> 16) & 0xff00);
+		entry->csum_ok = (cqe->sl_ipok & 1 && checksum == 0xffff);
 	}
 
 	entry->status = IB_WC_SUCCESS;
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 5cf8250..881ddc8 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -267,6 +267,10 @@ static int mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim)
 	if (dev_lim->flags & DEV_LIM_FLAG_SRQ)
 		mdev->mthca_flags |= MTHCA_FLAG_SRQ;
 
+	if (mthca_is_memfree(mdev))
+		if (dev_lim->flags & DEV_LIM_FLAG_IPOIB_CSUM)
+			mdev->device_cap_flags |= IB_DEVICE_IP_CSUM;
+
 	return 0;
 }
 
@@ -1109,6 +1113,8 @@ static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
 	if (err)
 		goto err_cmd;
 
+	mdev->ib_dev.flags = mdev->device_cap_flags;
+
 	if (mdev->fw_ver < mthca_hca_table[hca_type].latest_fw) {
 		mthca_warn(mdev, "HCA FW version %d.%d.%03d is old (%d.%d.%03d is current).\n",
 			   (int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff,
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index 0e5461c..86aa732 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -2012,6 +2012,8 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 			 cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
 			((wr->send_flags & IB_SEND_SOLICITED) ?
 			 cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0)   |
+			((wr->send_flags & IB_SEND_IP_CSUM) ?
+			 cpu_to_be32(MTHCA_NEXT_IP_CSUM | MTHCA_NEXT_TCP_UDP_CSUM) : 0) |
 			cpu_to_be32(1);
 		if (wr->opcode == IB_WR_SEND_WITH_IMM ||
 		    wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
diff --git a/drivers/infiniband/hw/mthca/mthca_wqe.h b/drivers/infiniband/hw/mthca/mthca_wqe.h
index f6a66fe..0e3a0e4 100644
--- a/drivers/infiniband/hw/mthca/mthca_wqe.h
+++ b/drivers/infiniband/hw/mthca/mthca_wqe.h
@@ -38,14 +38,15 @@
 #include <linux/types.h>
 
 enum {
-	MTHCA_NEXT_DBD       = 1 << 7,
-	MTHCA_NEXT_FENCE     = 1 << 6,
-	MTHCA_NEXT_CQ_UPDATE = 1 << 3,
-	MTHCA_NEXT_EVENT_GEN = 1 << 2,
-	MTHCA_NEXT_SOLICIT   = 1 << 1,
-
-	MTHCA_MLX_VL15       = 1 << 17,
-	MTHCA_MLX_SLR        = 1 << 16
+	MTHCA_NEXT_DBD          = 1 << 7,
+	MTHCA_NEXT_FENCE        = 1 << 6,
+	MTHCA_NEXT_CQ_UPDATE    = 1 << 3,
+	MTHCA_NEXT_EVENT_GEN    = 1 << 2,
+	MTHCA_NEXT_SOLICIT      = 1 << 1,
+	MTHCA_NEXT_IP_CSUM      = 1 << 4,
+	MTHCA_NEXT_TCP_UDP_CSUM = 1 << 5,
+	MTHCA_MLX_VL15          = 1 << 17,
+	MTHCA_MLX_SLR           = 1 << 16
 };
 
 enum {
-- 
1.5.3.8






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