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Date: Wed, 18 Jun 2008 22:10:08 -0700
From: "Karen Xie" <kxie@...lsio.com>
To: <michaelc@...wisc.edu>, "Divy Le Ray" <divy@...lsio.com>
Cc: <netdev@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
<security@...nel.org>, <open-iscsi@...glegroups.com>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3 2.6.27] cxgb3 - Add iSCSI support
From: Karen Xie <kxie@...lsio.com>
Add iSCSI support:
- read and write iSCSI related registers
- additional types of chelsio-protocol-language used by iscsi.
Signed-off-by: Karen Xie <kxie@...lsio.com>
---
drivers/net/cxgb3/cxgb3_ctl_defs.h | 5 +---
drivers/net/cxgb3/cxgb3_offload.c | 11 ++++++++++
drivers/net/cxgb3/regs.h | 10 +++++----
drivers/net/cxgb3/t3_cpl.h | 41 ++++++++++++++++++++++++++++++++++++
drivers/net/cxgb3/t3cdev.h | 4 +++-
5 files changed, 62 insertions(+), 9 deletions(-)
diff --git a/drivers/net/cxgb3/cxgb3_ctl_defs.h b/drivers/net/cxgb3/cxgb3_ctl_defs.h
index 6c4f320..d38e6cc 100644
--- a/drivers/net/cxgb3/cxgb3_ctl_defs.h
+++ b/drivers/net/cxgb3/cxgb3_ctl_defs.h
@@ -110,10 +110,7 @@ struct ulp_iscsi_info {
unsigned int llimit;
unsigned int ulimit;
unsigned int tagmask;
- unsigned int pgsz3;
- unsigned int pgsz2;
- unsigned int pgsz1;
- unsigned int pgsz0;
+ u8 pgsz_factor[4];
unsigned int max_rxsz;
unsigned int max_txsz;
struct pci_dev *pdev;
diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index ff9c013..ddf3d2d 100644
--- a/drivers/net/cxgb3/cxgb3_offload.c
+++ b/drivers/net/cxgb3/cxgb3_offload.c
@@ -207,6 +207,17 @@ static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
break;
case ULP_ISCSI_SET_PARAMS:
t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
+ /* set MaxRxData and MaxCoalesceSize to 16224 */
+ t3_write_reg(adapter, A_TP_PARA_REG2, 0x3f603f60);
+ /* program the ddp page sizes */
+ {
+ int i;
+ unsigned int val = 0;
+ for (i = 0; i < 4; i++)
+ val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
+ if (val)
+ t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
+ }
break;
default:
ret = -EOPNOTSUPP;
diff --git a/drivers/net/cxgb3/regs.h b/drivers/net/cxgb3/regs.h
index 5671788..4bda27c 100644
--- a/drivers/net/cxgb3/regs.h
+++ b/drivers/net/cxgb3/regs.h
@@ -1517,16 +1517,18 @@
#define A_ULPRX_ISCSI_TAGMASK 0x514
-#define S_HPZ0 0
-#define M_HPZ0 0xf
-#define V_HPZ0(x) ((x) << S_HPZ0)
-#define G_HPZ0(x) (((x) >> S_HPZ0) & M_HPZ0)
+#define A_ULPRX_ISCSI_PSZ 0x518
#define A_ULPRX_TDDP_LLIMIT 0x51c
#define A_ULPRX_TDDP_ULIMIT 0x520
#define A_ULPRX_TDDP_PSZ 0x528
+#define S_HPZ0 0
+#define M_HPZ0 0xf
+#define V_HPZ0(x) ((x) << S_HPZ0)
+#define G_HPZ0(x) (((x) >> S_HPZ0) & M_HPZ0)
+
#define A_ULPRX_STAG_LLIMIT 0x52c
#define A_ULPRX_STAG_ULIMIT 0x530
diff --git a/drivers/net/cxgb3/t3_cpl.h b/drivers/net/cxgb3/t3_cpl.h
index b7a1a31..db25ada 100644
--- a/drivers/net/cxgb3/t3_cpl.h
+++ b/drivers/net/cxgb3/t3_cpl.h
@@ -184,6 +184,9 @@ union opcode_tid {
#define G_OPCODE(x) (((x) >> S_OPCODE) & 0xFF)
#define G_TID(x) ((x) & 0xFFFFFF)
+#define S_QNUM 0
+#define G_QNUM(x) (((x) >> S_QNUM) & 0xFFFF)
+
/* tid is assumed to be 24-bits */
#define MK_OPCODE_TID(opcode, tid) (V_OPCODE(opcode) | (tid))
@@ -768,6 +771,12 @@ struct tx_data_wr {
__be32 param;
};
+/* tx_data_wr.flags fields */
+#define S_TX_ACK_PAGES 21
+#define M_TX_ACK_PAGES 0x7
+#define V_TX_ACK_PAGES(x) ((x) << S_TX_ACK_PAGES)
+#define G_TX_ACK_PAGES(x) (((x) >> S_TX_ACK_PAGES) & M_TX_ACK_PAGES)
+
/* tx_data_wr.param fields */
#define S_TX_PORT 0
#define M_TX_PORT 0x7
@@ -1441,4 +1450,36 @@ struct cpl_rdma_terminate {
#define M_TERM_TID 0xFFFFF
#define V_TERM_TID(x) ((x) << S_TERM_TID)
#define G_TERM_TID(x) (((x) >> S_TERM_TID) & M_TERM_TID)
+
+/* ULP_TX opcodes */
+enum { ULP_MEM_READ = 2, ULP_MEM_WRITE = 3, ULP_TXPKT = 4 };
+
+#define S_ULPTX_CMD 28
+#define M_ULPTX_CMD 0xF
+#define V_ULPTX_CMD(x) ((x) << S_ULPTX_CMD)
+
+#define S_ULPTX_NFLITS 0
+#define M_ULPTX_NFLITS 0xFF
+#define V_ULPTX_NFLITS(x) ((x) << S_ULPTX_NFLITS)
+
+struct ulp_mem_io {
+ WR_HDR;
+ __be32 cmd_lock_addr;
+ __be32 len;
+};
+
+/* ulp_mem_io.cmd_lock_addr fields */
+#define S_ULP_MEMIO_ADDR 0
+#define M_ULP_MEMIO_ADDR 0x7FFFFFF
+#define V_ULP_MEMIO_ADDR(x) ((x) << S_ULP_MEMIO_ADDR)
+
+#define S_ULP_MEMIO_LOCK 27
+#define V_ULP_MEMIO_LOCK(x) ((x) << S_ULP_MEMIO_LOCK)
+#define F_ULP_MEMIO_LOCK V_ULP_MEMIO_LOCK(1U)
+
+/* ulp_mem_io.len fields */
+#define S_ULP_MEMIO_DATA_LEN 28
+#define M_ULP_MEMIO_DATA_LEN 0xF
+#define V_ULP_MEMIO_DATA_LEN(x) ((x) << S_ULP_MEMIO_DATA_LEN)
+
#endif /* T3_CPL_H */
diff --git a/drivers/net/cxgb3/t3cdev.h b/drivers/net/cxgb3/t3cdev.h
index a18c8a1..0a21cfb 100644
--- a/drivers/net/cxgb3/t3cdev.h
+++ b/drivers/net/cxgb3/t3cdev.h
@@ -45,7 +45,8 @@ struct cxgb3_client;
enum t3ctype {
T3A = 0,
- T3B
+ T3B,
+ T3C,
};
struct t3cdev {
@@ -63,6 +64,7 @@ struct t3cdev {
void *l3opt; /* optional layer 3 data */
void *l4opt; /* optional layer 4 data */
void *ulp; /* ulp stuff */
+ void *ulp_iscsi; /* ulp iscsi */
};
#endif /* _T3CDEV_H_ */
--
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