IB/ehca: Add driver for IBM eHCA InfiniBand adapters

Add a driver for IBM GX bus InfiniBand adapters, which are usable with
some pSeries/System p systems.

Signed-off-by: Heiko J Schick <schickhj.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 259 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_qes.h b/drivers/infiniband/hw/ehca/ehca_qes.h
new file mode 100644
index 000000000000..8707d297ce4c
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ehca_qes.h
@@ -0,0 +1,259 @@
+/*
+ *  IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ *  Hardware request structures
+ *
+ *  Authors: Waleri Fomin <fomin@de.ibm.com>
+ *           Reinhard Ernst <rernst@de.ibm.com>
+ *           Christoph Raisch <raisch@de.ibm.com>
+ *
+ *  Copyright (c) 2005 IBM Corporation
+ *
+ *  All rights reserved.
+ *
+ *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
+ *  BSD.
+ *
+ * OpenIB BSD License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials
+ * provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef _EHCA_QES_H_
+#define _EHCA_QES_H_
+
+#include "ehca_tools.h"
+
+/* virtual scatter gather entry to specify remote adresses with length */
+struct ehca_vsgentry {
+	u64 vaddr;
+	u32 lkey;
+	u32 length;
+};
+
+#define GRH_FLAG_MASK        EHCA_BMASK_IBM(7,7)
+#define GRH_IPVERSION_MASK   EHCA_BMASK_IBM(0,3)
+#define GRH_TCLASS_MASK      EHCA_BMASK_IBM(4,12)
+#define GRH_FLOWLABEL_MASK   EHCA_BMASK_IBM(13,31)
+#define GRH_PAYLEN_MASK      EHCA_BMASK_IBM(32,47)
+#define GRH_NEXTHEADER_MASK  EHCA_BMASK_IBM(48,55)
+#define GRH_HOPLIMIT_MASK    EHCA_BMASK_IBM(56,63)
+
+/*
+ * Unreliable Datagram Address Vector Format
+ * see IBTA Vol1 chapter 8.3 Global Routing Header
+ */
+struct ehca_ud_av {
+	u8 sl;
+	u8 lnh;
+	u16 dlid;
+	u8 reserved1;
+	u8 reserved2;
+	u8 reserved3;
+	u8 slid_path_bits;
+	u8 reserved4;
+	u8 ipd;
+	u8 reserved5;
+	u8 pmtu;
+	u32 reserved6;
+	u64 reserved7;
+	union {
+		struct {
+			u64 word_0; /* always set to 6  */
+			/*should be 0x1B for IB transport */
+			u64 word_1;
+			u64 word_2;
+			u64 word_3;
+			u64 word_4;
+		} grh;
+		struct {
+			u32 wd_0;
+			u32 wd_1;
+			/* DWord_1 --> SGID */
+
+			u32 sgid_wd3;
+			u32 sgid_wd2;
+
+			u32 sgid_wd1;
+			u32 sgid_wd0;
+			/* DWord_3 --> DGID */
+
+			u32 dgid_wd3;
+			u32 dgid_wd2;
+
+			u32 dgid_wd1;
+			u32 dgid_wd0;
+		} grh_l;
+	};
+};
+
+/* maximum number of sg entries allowed in a WQE */
+#define MAX_WQE_SG_ENTRIES 252
+
+#define WQE_OPTYPE_SEND             0x80
+#define WQE_OPTYPE_RDMAREAD         0x40
+#define WQE_OPTYPE_RDMAWRITE        0x20
+#define WQE_OPTYPE_CMPSWAP          0x10
+#define WQE_OPTYPE_FETCHADD         0x08
+#define WQE_OPTYPE_BIND             0x04
+
+#define WQE_WRFLAG_REQ_SIGNAL_COM   0x80
+#define WQE_WRFLAG_FENCE            0x40
+#define WQE_WRFLAG_IMM_DATA_PRESENT 0x20
+#define WQE_WRFLAG_SOLIC_EVENT      0x10
+
+#define WQEF_CACHE_HINT             0x80
+#define WQEF_CACHE_HINT_RD_WR       0x40
+#define WQEF_TIMED_WQE              0x20
+#define WQEF_PURGE                  0x08
+#define WQEF_HIGH_NIBBLE            0xF0
+
+#define MW_BIND_ACCESSCTRL_R_WRITE   0x40
+#define MW_BIND_ACCESSCTRL_R_READ    0x20
+#define MW_BIND_ACCESSCTRL_R_ATOMIC  0x10
+
+struct ehca_wqe {
+	u64 work_request_id;
+	u8 optype;
+	u8 wr_flag;
+	u16 pkeyi;
+	u8 wqef;
+	u8 nr_of_data_seg;
+	u16 wqe_provided_slid;
+	u32 destination_qp_number;
+	u32 resync_psn_sqp;
+	u32 local_ee_context_qkey;
+	u32 immediate_data;
+	union {
+		struct {
+			u64 remote_virtual_adress;
+			u32 rkey;
+			u32 reserved;
+			u64 atomic_1st_op_dma_len;
+			u64 atomic_2nd_op;
+			struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
+
+		} nud;
+		struct {
+			u64 ehca_ud_av_ptr;
+			u64 reserved1;
+			u64 reserved2;
+			u64 reserved3;
+			struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
+		} ud_avp;
+		struct {
+			struct ehca_ud_av ud_av;
+			struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES -
+						     2];
+		} ud_av;
+		struct {
+			u64 reserved0;
+			u64 reserved1;
+			u64 reserved2;
+			u64 reserved3;
+			struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
+		} all_rcv;
+
+		struct {
+			u64 reserved;
+			u32 rkey;
+			u32 old_rkey;
+			u64 reserved1;
+			u64 reserved2;
+			u64 virtual_address;
+			u32 reserved3;
+			u32 length;
+			u32 reserved4;
+			u16 reserved5;
+			u8 reserved6;
+			u8 lr_ctl;
+			u32 lkey;
+			u32 reserved7;
+			u64 reserved8;
+			u64 reserved9;
+			u64 reserved10;
+			u64 reserved11;
+		} bind;
+		struct {
+			u64 reserved12;
+			u64 reserved13;
+			u32 size;
+			u32 start;
+		} inline_data;
+	} u;
+
+};
+
+#define WC_SEND_RECEIVE EHCA_BMASK_IBM(0,0)
+#define WC_IMM_DATA     EHCA_BMASK_IBM(1,1)
+#define WC_GRH_PRESENT  EHCA_BMASK_IBM(2,2)
+#define WC_SE_BIT       EHCA_BMASK_IBM(3,3)
+#define WC_STATUS_ERROR_BIT 0x80000000
+#define WC_STATUS_REMOTE_ERROR_FLAGS 0x0000F800
+#define WC_STATUS_PURGE_BIT 0x10
+
+struct ehca_cqe {
+	u64 work_request_id;
+	u8 optype;
+	u8 w_completion_flags;
+	u16 reserved1;
+	u32 nr_bytes_transferred;
+	u32 immediate_data;
+	u32 local_qp_number;
+	u8 freed_resource_count;
+	u8 service_level;
+	u16 wqe_count;
+	u32 qp_token;
+	u32 qkey_ee_token;
+	u32 remote_qp_number;
+	u16 dlid;
+	u16 rlid;
+	u16 reserved2;
+	u16 pkey_index;
+	u32 cqe_timestamp;
+	u32 wqe_timestamp;
+	u8 wqe_timestamp_valid;
+	u8 reserved3;
+	u8 reserved4;
+	u8 cqe_flags;
+	u32 status;
+};
+
+struct ehca_eqe {
+	u64 entry;
+};
+
+struct ehca_mrte {
+	u64 starting_va;
+	u64 length; /* length of memory region in bytes*/
+	u32 pd;
+	u8 key_instance;
+	u8 pagesize;
+	u8 mr_control;
+	u8 local_remote_access_ctrl;
+	u8 reserved[0x20 - 0x18];
+	u64 at_pointer[4];
+};
+#endif /*_EHCA_QES_H_*/