[PATCH] ehea: IBM eHEA Ethernet Device Driver

Hi Jeff,

I fixed the __iomem issue and tested the driver with sparse. Looks good so far.
Thanks for your effort.

Jan-Bernd Themann

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>

 drivers/net/Kconfig             |    9
 drivers/net/Makefile            |    1
 drivers/net/ehea/Makefile       |    6
 drivers/net/ehea/ehea.h         |  447 ++++++
 drivers/net/ehea/ehea_ethtool.c |  294 ++++
 drivers/net/ehea/ehea_hcall.h   |   51
 drivers/net/ehea/ehea_hw.h      |  287 ++++
 drivers/net/ehea/ehea_main.c    | 2654 ++++++++++++++++++++++++++++++++++++++++
 drivers/net/ehea/ehea_phyp.c    |  705 ++++++++++
 drivers/net/ehea/ehea_phyp.h    |  455 ++++++
 drivers/net/ehea/ehea_qmr.c     |  582 ++++++++
 drivers/net/ehea/ehea_qmr.h     |  358 +++++
 12 files changed, 5849 insertions(+)
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/net/ehea/ehea_qmr.h b/drivers/net/ehea/ehea_qmr.h
new file mode 100644
index 000000000000..7efdc96919ca
--- /dev/null
+++ b/drivers/net/ehea/ehea_qmr.h
@@ -0,0 +1,358 @@
+/*
+ *  linux/drivers/net/ehea/ehea_qmr.h
+ *
+ *  eHEA ethernet device driver for IBM eServer System p
+ *
+ *  (C) Copyright IBM Corp. 2006
+ *
+ *  Authors:
+ *       Christoph Raisch <raisch@de.ibm.com>
+ *       Jan-Bernd Themann <themann@de.ibm.com>
+ *       Thomas Klein <tklein@de.ibm.com>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __EHEA_QMR_H__
+#define __EHEA_QMR_H__
+
+#include "ehea.h"
+#include "ehea_hw.h"
+
+/*
+ * page size of ehea hardware queues
+ */
+
+#define EHEA_PAGESHIFT  12
+#define EHEA_PAGESIZE   4096UL
+
+/* Some abbreviations used here:
+ *
+ * WQE  - Work Queue Entry
+ * SWQE - Send Work Queue Entry
+ * RWQE - Receive Work Queue Entry
+ * CQE  - Completion Queue Entry
+ * EQE  - Event Queue Entry
+ * MR   - Memory Region
+ */
+
+/* Use of WR_ID field for EHEA */
+#define EHEA_WR_ID_COUNT   EHEA_BMASK_IBM(0, 19)
+#define EHEA_WR_ID_TYPE    EHEA_BMASK_IBM(20, 23)
+#define EHEA_SWQE2_TYPE    0x1
+#define EHEA_SWQE3_TYPE    0x2
+#define EHEA_RWQE2_TYPE    0x3
+#define EHEA_RWQE3_TYPE    0x4
+#define EHEA_WR_ID_INDEX   EHEA_BMASK_IBM(24, 47)
+#define EHEA_WR_ID_REFILL  EHEA_BMASK_IBM(48, 63)
+
+struct ehea_vsgentry {
+        u64 vaddr;
+        u32 l_key;
+        u32 len;
+};
+
+/* maximum number of sg entries allowed in a WQE */
+#define EHEA_MAX_WQE_SG_ENTRIES         252
+#define SWQE2_MAX_IMM                   (0xD0 - 0x30)
+#define SWQE3_MAX_IMM                   224
+
+/* tx control flags for swqe */
+#define EHEA_SWQE_CRC                   0x8000
+#define EHEA_SWQE_IP_CHECKSUM           0x4000
+#define EHEA_SWQE_TCP_CHECKSUM          0x2000
+#define EHEA_SWQE_TSO                   0x1000
+#define EHEA_SWQE_SIGNALLED_COMPLETION  0x0800
+#define EHEA_SWQE_VLAN_INSERT           0x0400
+#define EHEA_SWQE_IMM_DATA_PRESENT      0x0200
+#define EHEA_SWQE_DESCRIPTORS_PRESENT   0x0100
+#define EHEA_SWQE_WRAP_CTL_REC          0x0080
+#define EHEA_SWQE_WRAP_CTL_FORCE        0x0040
+#define EHEA_SWQE_BIND                  0x0020
+#define EHEA_SWQE_PURGE                 0x0010
+
+/* sizeof(struct ehea_swqe) less the union */
+#define SWQE_HEADER_SIZE                32
+
+struct ehea_swqe {
+        u64 wr_id;
+        u16 tx_control;
+        u16 vlan_tag;
+        u8 reserved1;
+        u8 ip_start;
+        u8 ip_end;
+        u8 immediate_data_length;
+        u8 tcp_offset;
+        u8 reserved2;
+        u16 tcp_end;
+        u8 wrap_tag;
+        u8 descriptors;         /* number of valid descriptors in WQE */
+        u16 reserved3;
+        u16 reserved4;
+        u16 mss;
+        u32 reserved5;
+        union {
+                /*  Send WQE Format 1 */
+                struct {
+                        struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
+                } no_immediate_data;
+
+                /*  Send WQE Format 2 */
+                struct {
+                        struct ehea_vsgentry sg_entry;
+                        /* 0x30 */
+                        u8 immediate_data[SWQE2_MAX_IMM];
+                        /* 0xd0 */
+                        struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1];
+                } immdata_desc __attribute__ ((packed));
+
+                /*  Send WQE Format 3 */
+                struct {
+                        u8 immediate_data[SWQE3_MAX_IMM];
+                } immdata_nodesc;
+        } u;
+};
+
+struct ehea_rwqe {
+        u64 wr_id;              /* work request ID */
+        u8 reserved1[5];
+        u8 data_segments;
+        u16 reserved2;
+        u64 reserved3;
+        u64 reserved4;
+        struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
+};
+
+#define EHEA_CQE_VLAN_TAG_XTRACT   0x0400
+
+#define EHEA_CQE_TYPE_RQ           0x60
+#define EHEA_CQE_STAT_ERR_MASK     0x721F
+#define EHEA_CQE_STAT_FAT_ERR_MASK 0x1F
+#define EHEA_CQE_STAT_ERR_TCP      0x4000
+
+struct ehea_cqe {
+        u64 wr_id;              /* work request ID from WQE */
+        u8 type;
+        u8 valid;
+        u16 status;
+        u16 reserved1;
+        u16 num_bytes_transfered;
+        u16 vlan_tag;
+        u16 inet_checksum_value;
+        u8 reserved2;
+        u8 header_length;
+        u16 reserved3;
+        u16 page_offset;
+        u16 wqe_count;
+        u32 qp_token;
+        u32 timestamp;
+        u32 reserved4;
+        u64 reserved5[3];
+};
+
+#define EHEA_EQE_VALID           EHEA_BMASK_IBM(0, 0)
+#define EHEA_EQE_IS_CQE          EHEA_BMASK_IBM(1, 1)
+#define EHEA_EQE_IDENTIFIER      EHEA_BMASK_IBM(2, 7)
+#define EHEA_EQE_QP_CQ_NUMBER    EHEA_BMASK_IBM(8, 31)
+#define EHEA_EQE_QP_TOKEN        EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_CQ_TOKEN        EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_KEY             EHEA_BMASK_IBM(32, 63)
+#define EHEA_EQE_PORT_NUMBER     EHEA_BMASK_IBM(56, 63)
+#define EHEA_EQE_EQ_NUMBER       EHEA_BMASK_IBM(48, 63)
+#define EHEA_EQE_SM_ID           EHEA_BMASK_IBM(48, 63)
+#define EHEA_EQE_SM_MECH_NUMBER  EHEA_BMASK_IBM(48, 55)
+#define EHEA_EQE_SM_PORT_NUMBER  EHEA_BMASK_IBM(56, 63)
+
+struct ehea_eqe {
+        u64 entry;
+};
+
+static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset)
+{
+        struct ehea_page *current_page;
+
+        if (q_offset >= queue->queue_length)
+                q_offset -= queue->queue_length;
+        current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT];
+        return &current_page->entries[q_offset & (EHEA_PAGESIZE - 1)];
+}
+
+static inline void *hw_qeit_get(struct hw_queue *queue)
+{
+        return hw_qeit_calc(queue, queue->current_q_offset);
+}
+
+static inline void hw_qeit_inc(struct hw_queue *queue)
+{
+        queue->current_q_offset += queue->qe_size;
+        if (queue->current_q_offset >= queue->queue_length) {
+                queue->current_q_offset = 0;
+                /* toggle the valid flag */
+                queue->toggle_state = (~queue->toggle_state) & 1;
+        }
+}
+
+static inline void *hw_qeit_get_inc(struct hw_queue *queue)
+{
+        void *retvalue = hw_qeit_get(queue);
+        hw_qeit_inc(queue);
+        return retvalue;
+}
+
+static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue)
+{
+        struct ehea_cqe *retvalue = hw_qeit_get(queue);
+        u8 valid = retvalue->valid;
+        void *pref;
+
+        if ((valid >> 7) == (queue->toggle_state & 1)) {
+                /* this is a good one */
+                hw_qeit_inc(queue);
+                pref = hw_qeit_calc(queue, queue->current_q_offset);
+                prefetch(pref);
+                prefetch(pref + 128);
+        } else
+                retvalue = NULL;
+        return retvalue;
+}
+
+static inline void *hw_qeit_get_valid(struct hw_queue *queue)
+{
+        struct ehea_cqe *retvalue = hw_qeit_get(queue);
+        void *pref;
+        u8 valid;
+
+        pref = hw_qeit_calc(queue, queue->current_q_offset);
+        prefetch(pref);
+        prefetch(pref + 128);
+        prefetch(pref + 256);
+        valid = retvalue->valid;
+        if (!((valid >> 7) == (queue->toggle_state & 1)))
+                retvalue = NULL;
+        return retvalue;
+}
+
+static inline void *hw_qeit_reset(struct hw_queue *queue)
+{
+        queue->current_q_offset = 0;
+        return hw_qeit_get(queue);
+}
+
+static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue)
+{
+        u64 last_entry_in_q = queue->queue_length - queue->qe_size;
+        void *retvalue;
+
+        retvalue = hw_qeit_get(queue);
+        queue->current_q_offset += queue->qe_size;
+        if (queue->current_q_offset > last_entry_in_q) {
+                queue->current_q_offset = 0;
+                queue->toggle_state = (~queue->toggle_state) & 1;
+        }
+        return retvalue;
+}
+
+static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue)
+{
+        void *retvalue = hw_qeit_get(queue);
+        u32 qe = *(u8*)retvalue;
+        if ((qe >> 7) == (queue->toggle_state & 1))
+                hw_qeit_eq_get_inc(queue);
+        else
+                retvalue = NULL;
+        return retvalue;
+}
+
+static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp,
+                                                   int rq_nr)
+{
+        struct hw_queue *queue;
+
+        if (rq_nr == 1)
+                queue = &qp->hw_rqueue1;
+        else if (rq_nr == 2)
+                queue = &qp->hw_rqueue2;
+        else
+                queue = &qp->hw_rqueue3;
+
+        return hw_qeit_get_inc(queue);
+}
+
+static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp,
+                                              int *wqe_index)
+{
+        struct hw_queue *queue = &my_qp->hw_squeue;
+        struct ehea_swqe *wqe_p;
+
+        *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ);
+        wqe_p = hw_qeit_get_inc(&my_qp->hw_squeue);
+
+        return wqe_p;
+}
+
+static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe)
+{
+        iosync();
+        ehea_update_sqa(my_qp, 1);
+}
+
+static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index)
+{
+        struct hw_queue *queue = &qp->hw_rqueue1;
+
+        *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1);
+        return hw_qeit_get_valid(queue);
+}
+
+static inline void ehea_inc_rq1(struct ehea_qp *qp)
+{
+        hw_qeit_inc(&qp->hw_rqueue1);
+}
+
+static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq)
+{
+        return hw_qeit_get_inc_valid(&my_cq->hw_queue);
+}
+
+#define EHEA_CQ_REGISTER_ORIG 0
+#define EHEA_EQ_REGISTER_ORIG 0
+
+enum ehea_eq_type {
+        EHEA_EQ = 0,            /* event queue              */
+        EHEA_NEQ                /* notification event queue */
+};
+
+struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
+                               enum ehea_eq_type type,
+                               const u32 length, const u8 eqe_gen);
+
+int ehea_destroy_eq(struct ehea_eq *eq);
+
+struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq);
+
+struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe,
+                               u64 eq_handle, u32 cq_token);
+
+int ehea_destroy_cq(struct ehea_cq *cq);
+
+struct ehea_qp *ehea_create_qp(struct ehea_adapter * adapter, u32 pd,
+                               struct ehea_qp_init_attr *init_attr);
+
+int ehea_destroy_qp(struct ehea_qp *qp);
+
+int ehea_reg_mr_adapter(struct ehea_adapter *adapter);
+
+#endif  /* __EHEA_QMR_H__ */