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Subject[PATCH 21/22] ehca main file
Date
From: Roland Dreier <rolandd@cisco.com>

What is ehca_show_flightrecorder() trying to do that snprintf() is
not fast enough? If you need to pass a binary structure back to
userspace (with a kernel address in it??) then sysfs is not the right
place to put it. Look at debugfs; or relayfs might make the most
sense for your flightrecorder stuff.
---

drivers/infiniband/hw/ehca/ehca_main.c | 1032 ++++++++++++++++++++++++++++++++
1 files changed, 1032 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
new file mode 100644
index 0000000..2e2be06
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -0,0 +1,1032 @@
+/*
+ * IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ * module start stop, hca detection
+ *
+ * Authors: Heiko J Schick <schickhj@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.
+ *
+ * $Id: ehca_main.c,v 1.137 2006/02/06 16:20:38 schickhj Exp $
+ */
+
+#define DEB_PREFIX "shca"
+
+#include "ehca_kernel.h"
+#include "ehca_tools.h"
+#include "ehca_classes.h"
+#include "ehca_iverbs.h"
+#include "ehca_eq.h"
+#include "ehca_mrmw.h"
+
+#include "hcp_sense.h" /* TODO: later via hipz_* header file */
+#include "hcp_if.h" /* TODO: later via hipz_* header file */
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
+MODULE_DESCRIPTION("IBM eServer HCA Driver");
+MODULE_VERSION("EHCA2_0047");
+
+#ifdef EHCA_USERDRIVER
+int ehca_open_aqp1 = 1;
+#else
+int ehca_open_aqp1 = 0;
+#endif
+int ehca_tracelevel = -1;
+int ehca_hw_level = 0;
+int ehca_nr_ports = 2;
+int ehca_use_hp_mr = 0;
+int ehca_port_act_time = 30;
+int ehca_poll_all_eqs = 1;
+int ehca_static_rate = -1;
+
+module_param_named(open_aqp1, ehca_open_aqp1, int, 0);
+module_param_named(tracelevel, ehca_tracelevel, int, 0);
+module_param_named(hw_level, ehca_hw_level, int, 0);
+module_param_named(nr_ports, ehca_nr_ports, int, 0);
+module_param_named(use_hp_mr, ehca_use_hp_mr, int, 0);
+module_param_named(port_act_time, ehca_port_act_time, int, 0);
+module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, 0);
+module_param_named(static_rate, ehca_static_rate, int, 0);
+
+MODULE_PARM_DESC(open_aqp1, "0 no define AQP1 on startup (default),"
+ "1 define AQP1 on startup");
+MODULE_PARM_DESC(tracelevel, "0 maximum performance (no messages),"
+ "9 maximum messages (no performance)");
+MODULE_PARM_DESC(hw_level, "0 autosensing,"
+ "1 v. 0.20,"
+ "2 v. 0.21");
+MODULE_PARM_DESC(nr_ports, "number of connected ports (default: 2)");
+MODULE_PARM_DESC(use_hp_mr, "use high performance MRs,"
+ "0 no (default),"
+ "1 yes");
+MODULE_PARM_DESC(port_act_time, "time to wait for port activation"
+ "(default: 30 sec.)");
+MODULE_PARM_DESC(poll_all_eqs, "polls all event queues periodically"
+ "0 no,"
+ "1 yes (default)");
+MODULE_PARM_DESC(static_rate, "set permanent static rate (default: disabled)");
+
+/* This external trace mask controls what will end up in the
+ * kernel ring buffer. Number 6 means, that everything between
+ * 0 and 5 will be stored.
+ */
+u8 ehca_edeb_mask[EHCA_EDEB_TRACE_MASK_SIZE]={6,6,6,6,
+ 6,6,6,6,
+ 6,6,6,6,
+ 6,6,6,6,
+ 6,6,6,6,
+ 6,6,6,6,
+ 6,6,6,6,
+ 6,6,1,0};
+ /* offset 0x1e is flightrecorder */
+EXPORT_SYMBOL(ehca_edeb_mask);
+
+atomic_t ehca_flightrecorder_index = ATOMIC_INIT(1);
+unsigned long ehca_flightrecorder[EHCA_FLIGHTRECORDER_SIZE];
+EXPORT_SYMBOL(ehca_flightrecorder_index);
+EXPORT_SYMBOL(ehca_flightrecorder);
+
+DECLARE_RWSEM(ehca_qp_idr_sem);
+DECLARE_RWSEM(ehca_cq_idr_sem);
+DEFINE_IDR(ehca_qp_idr);
+DEFINE_IDR(ehca_cq_idr);
+
+struct ehca_module ehca_module;
+struct workqueue_struct *ehca_wq;
+struct task_struct *ehca_kthread_eq;
+
+/**
+ * ehca_init_trace - TODO
+ */
+void ehca_init_trace(void)
+{
+ EDEB_EN(7, "");
+
+ if (ehca_tracelevel != -1) {
+ int i;
+ for (i = 0; i < EHCA_EDEB_TRACE_MASK_SIZE; i++)
+ ehca_edeb_mask[i] = ehca_tracelevel;
+ }
+
+ EDEB_EX(7, "");
+}
+
+/**
+ * ehca_init_flight - TODO
+ */
+void ehca_init_flight(void)
+{
+ EDEB_EN(7, "");
+
+ memset(ehca_flightrecorder, 0xFA,
+ sizeof(unsigned long) * EHCA_FLIGHTRECORDER_SIZE);
+ atomic_set(&ehca_flightrecorder_index, 0);
+ ehca_flightrecorder[0] = 0x12345678abcdef0;
+
+ EDEB_EX(7, "");
+}
+
+/**
+ * ehca_flight_to_printk - TODO
+ */
+void ehca_flight_to_printk(void)
+{
+ int cur_offset = atomic_read(&ehca_flightrecorder_index);
+ int new_offset = cur_offset - (EHCA_FLIGHTRECORDER_BACKLOG * 4);
+ u32 flight_offset;
+ int i;
+
+ if (new_offset < 0)
+ new_offset = EHCA_FLIGHTRECORDER_SIZE + new_offset - 4;
+
+ printk(KERN_ERR
+ "EHCA ----- flight recorder begin "
+ "-------------------------------------------\n");
+
+ for (i = 0; i < EHCA_FLIGHTRECORDER_BACKLOG; i++) {
+ new_offset += 4;
+ flight_offset = (u32) new_offset % EHCA_FLIGHTRECORDER_SIZE;
+
+ printk(KERN_ERR "EHCA %02d: %.16lX %.16lX %.16lX %.16lX\n",
+ i + 1,
+ ehca_flightrecorder[flight_offset],
+ ehca_flightrecorder[flight_offset + 1],
+ ehca_flightrecorder[flight_offset + 2],
+ ehca_flightrecorder[flight_offset + 3]);
+ }
+
+ printk(KERN_ERR
+ "EHCA ----- flight recorder end "
+ "---------------------------------------------\n");
+}
+
+#define EHCA_CACHE_CREATE(name) \
+ ehca_module->cache_##name = \
+ kmem_cache_create("ehca_cache_"#name, \
+ sizeof(struct ehca_##name), \
+ 0, SLAB_HWCACHE_ALIGN, \
+ NULL, NULL); \
+ if (ehca_module->cache_##name == NULL) { \
+ EDEB_ERR(4, "Cannot create "#name" SLAB cache."); \
+ return -ENOMEM; \
+ } \
+
+/**
+ * ehca_caches_create: TODO
+ */
+int ehca_caches_create(struct ehca_module *ehca_module)
+{
+ EDEB_EN(7, "");
+
+ EHCA_CACHE_CREATE(pd);
+ EHCA_CACHE_CREATE(cq);
+ EHCA_CACHE_CREATE(qp);
+ EHCA_CACHE_CREATE(av);
+ EHCA_CACHE_CREATE(mw);
+ EHCA_CACHE_CREATE(mr);
+
+ EDEB_EX(7, "");
+
+ return 0;
+}
+
+#define EHCA_CACHE_DESTROY(name) \
+ ret = kmem_cache_destroy(ehca_module->cache_##name); \
+ if (ret != 0) { \
+ EDEB_ERR(4, "Cannot destroy "#name" SLAB cache. ret=%x", ret); \
+ return ret; \
+ } \
+
+/**
+ * ehca_caches_destroy - TODO
+ */
+int ehca_caches_destroy(struct ehca_module *ehca_module)
+{
+ int ret;
+
+ EDEB_EN(7, "");
+
+ EHCA_CACHE_DESTROY(pd);
+ EHCA_CACHE_DESTROY(cq);
+ EHCA_CACHE_DESTROY(qp);
+ EHCA_CACHE_DESTROY(av);
+ EHCA_CACHE_DESTROY(mw);
+ EHCA_CACHE_DESTROY(mr);
+
+ EDEB_EX(7, "");
+
+ return 0;
+}
+
+#define EHCA_HCAAVER EHCA_BMASK_IBM(32,39)
+#define EHCA_REVID EHCA_BMASK_IBM(40,63)
+
+/**
+ * ehca_num_ports - TODO
+ */
+int ehca_sense_attributes(struct ehca_shca *shca)
+{
+ int ret = -EINVAL;
+ u64 rc = H_Success;
+ struct query_hca_rblock *rblock;
+
+ EDEB_EN(7, "shca=%p", shca);
+
+ rblock = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (rblock == NULL) {
+ EDEB_ERR(4, "Cannot allocate rblock memory.");
+ ret = -ENOMEM;
+ goto num_ports0;
+ }
+
+ memset(rblock, 0, PAGE_SIZE);
+
+ rc = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
+ if (rc != H_Success) {
+ EDEB_ERR(4, "Cannot query device properties.rc=%lx", rc);
+ ret = -EPERM;
+ goto num_ports1;
+ }
+
+ if (ehca_nr_ports == 1)
+ shca->num_ports = 1;
+ else
+ shca->num_ports = (u8) rblock->num_ports;
+
+ EDEB(6, " ... found %x ports", rblock->num_ports);
+
+ if (ehca_hw_level == 0) {
+ u32 hcaaver;
+ u32 revid;
+
+ hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
+ revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
+
+ EDEB(6, " ... hardware version=%x:%x",
+ hcaaver, revid);
+
+ if ((hcaaver == 1) && (revid == 0))
+ shca->hw_level = 0;
+ else if ((hcaaver == 1) && (revid == 1))
+ shca->hw_level = 1;
+ else if ((hcaaver == 1) && (revid == 2))
+ shca->hw_level = 2;
+ }
+ EDEB(6, " ... hardware level=%x", shca->hw_level);
+
+ ret = 0;
+
+ num_ports1:
+ kfree(rblock);
+
+ num_ports0:
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+}
+
+static int init_node_guid(struct ehca_shca* shca)
+{
+ int ret = 0;
+ struct query_hca_rblock *rblock;
+
+ EDEB_EN(7, "");
+
+ rblock = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (rblock == NULL) {
+ EDEB_ERR(4, "Can't allocate rblock memory.");
+ ret = -ENOMEM;
+ goto init_node_guid0;
+ }
+
+ memset(rblock, 0, PAGE_SIZE);
+
+ if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_Success) {
+ EDEB_ERR(4, "Can't query device properties");
+ ret = -EINVAL;
+ goto init_node_guid1;
+ }
+
+ memcpy(&shca->ib_device.node_guid, &rblock->node_guid, (sizeof(u64)));
+
+ init_node_guid1:
+ kfree(rblock);
+
+ init_node_guid0:
+ EDEB_EX(7, "node_guid=%lx ret=%x", shca->ib_device.node_guid, ret);
+
+ return ret;
+}
+
+int ehca_register_device(struct ehca_shca *shca)
+{
+ int ret = 0;
+
+ EDEB_EN(7, "shca=%p", shca);
+
+ ret = init_node_guid(shca);
+ if (ret != 0)
+ return ret;
+
+ strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
+ shca->ib_device.owner = THIS_MODULE;
+
+ /* TODO: ABI ver later with define */
+ shca->ib_device.uverbs_abi_ver = 1;
+ shca->ib_device.uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
+ (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
+
+ shca->ib_device.node_type = RDMA_NODE_IB_CA;
+ shca->ib_device.phys_port_cnt = shca->num_ports;
+ shca->ib_device.dma_device = &shca->ibmebus_dev->ofdev.dev;
+ shca->ib_device.query_device = ehca_query_device;
+ shca->ib_device.query_port = ehca_query_port;
+ shca->ib_device.query_gid = ehca_query_gid;
+ shca->ib_device.query_pkey = ehca_query_pkey;
+ /* shca->in_device.modify_device = ehca_modify_device */
+ shca->ib_device.modify_port = ehca_modify_port;
+ shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
+ shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
+ shca->ib_device.alloc_pd = ehca_alloc_pd;
+ shca->ib_device.dealloc_pd = ehca_dealloc_pd;
+ shca->ib_device.create_ah = ehca_create_ah;
+ /* shca->ib_device.modify_ah = ehca_modify_ah; */
+ shca->ib_device.query_ah = ehca_query_ah;
+ shca->ib_device.destroy_ah = ehca_destroy_ah;
+ shca->ib_device.create_qp = ehca_create_qp;
+ shca->ib_device.modify_qp = ehca_modify_qp;
+ shca->ib_device.query_qp = ehca_query_qp;
+ shca->ib_device.destroy_qp = ehca_destroy_qp;
+ shca->ib_device.post_send = ehca_post_send;
+ shca->ib_device.post_recv = ehca_post_recv;
+ shca->ib_device.create_cq = ehca_create_cq;
+ shca->ib_device.destroy_cq = ehca_destroy_cq;
+
+ /* TODO: disabled due to func signature conflict */
+ /* shca->ib_device.resize_cq = ehca_resize_cq; */
+
+ shca->ib_device.poll_cq = ehca_poll_cq;
+ /* shca->ib_device.peek_cq = ehca_peek_cq; */
+ shca->ib_device.req_notify_cq = ehca_req_notify_cq;
+ /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
+ shca->ib_device.get_dma_mr = ehca_get_dma_mr;
+ shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
+ shca->ib_device.reg_user_mr = ehca_reg_user_mr;
+ shca->ib_device.query_mr = ehca_query_mr;
+ shca->ib_device.dereg_mr = ehca_dereg_mr;
+ shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
+ shca->ib_device.alloc_mw = ehca_alloc_mw;
+ shca->ib_device.bind_mw = ehca_bind_mw;
+ shca->ib_device.dealloc_mw = ehca_dealloc_mw;
+ shca->ib_device.alloc_fmr = ehca_alloc_fmr;
+ shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
+ shca->ib_device.unmap_fmr = ehca_unmap_fmr;
+ shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
+ shca->ib_device.attach_mcast = ehca_attach_mcast;
+ shca->ib_device.detach_mcast = ehca_detach_mcast;
+ /* shca->ib_device.process_mad = ehca_process_mad; */
+ shca->ib_device.mmap = ehca_mmap;
+
+ ret = ib_register_device(&shca->ib_device);
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+}
+
+/**
+ * ehca_create_aqp1 - TODO
+ *
+ * @shca: TODO
+ */
+static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
+{
+ struct ehca_sport *sport;
+ struct ib_cq *ibcq;
+ struct ib_qp *ibqp;
+ struct ib_qp_init_attr qp_init_attr;
+ int ret = 0;
+
+ EDEB_EN(7, "shca=%p port=%x", shca, port);
+
+ sport = &shca->sport[port - 1];
+
+ if (sport->ibcq_aqp1 != NULL) {
+ EDEB_ERR(4, "AQP1 CQ is already created.");
+ return -EPERM;
+ }
+
+ ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10);
+ if (IS_ERR(ibcq)) {
+ EDEB_ERR(4, "Cannot create AQP1 CQ.");
+ return PTR_ERR(ibcq);
+ }
+ sport->ibcq_aqp1 = ibcq;
+
+ if (sport->ibqp_aqp1 != NULL) {
+ EDEB_ERR(4, "AQP1 QP is already created.");
+ ret = -EPERM;
+ goto create_aqp1;
+ }
+
+ memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
+ qp_init_attr.send_cq = ibcq;
+ qp_init_attr.recv_cq = ibcq;
+ qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
+ qp_init_attr.cap.max_send_wr = 100;
+ qp_init_attr.cap.max_recv_wr = 100;
+ qp_init_attr.cap.max_send_sge = 2;
+ qp_init_attr.cap.max_recv_sge = 1;
+ qp_init_attr.qp_type = IB_QPT_GSI;
+ qp_init_attr.port_num = port;
+ qp_init_attr.qp_context = NULL;
+ qp_init_attr.event_handler = NULL;
+ qp_init_attr.srq = NULL;
+
+ ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
+ if (IS_ERR(ibqp)) {
+ EDEB_ERR(4, "Cannot create AQP1 QP.");
+ ret = PTR_ERR(ibqp);
+ goto create_aqp1;
+ }
+ sport->ibqp_aqp1 = ibqp;
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+
+ create_aqp1:
+ ib_destroy_cq(sport->ibcq_aqp1);
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+}
+
+/**
+ * ehca_destroy_aqp1 - TODO
+ */
+static int ehca_destroy_aqp1(struct ehca_sport *sport)
+{
+ int ret = 0;
+
+ EDEB_EN(7, "sport=%p", sport);
+
+ ret = ib_destroy_qp(sport->ibqp_aqp1);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot destroy AQP1 QP. ret=%x", ret);
+ goto destroy_aqp1;
+ }
+
+ ret = ib_destroy_cq(sport->ibcq_aqp1);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy AQP1 CQ. ret=%x", ret);
+
+ destroy_aqp1:
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+}
+
+static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
+{
+ int f;
+ int total = 0;
+ total += snprintf(buf + total, PAGE_SIZE - total, "%d",
+ ehca_edeb_mask[0]);
+ for (f = 1; f < EHCA_EDEB_TRACE_MASK_SIZE; f++) {
+ total += snprintf(buf + total, PAGE_SIZE - total, ",%d",
+ ehca_edeb_mask[f]);
+ }
+
+ total += snprintf(buf + total, PAGE_SIZE - total, "\n");
+
+ return total;
+}
+
+static ssize_t ehca_store_debug_level(struct device_driver *ddp,
+ const char *buf, size_t count)
+{
+ int f;
+ for (f = 0; f < EHCA_EDEB_TRACE_MASK_SIZE; f++) {
+ char value = buf[f * 2] - '0';
+ if ((value <= 9) && (count >= f * 2)) {
+ ehca_edeb_mask[f] = value;
+ }
+ }
+ return count;
+}
+DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
+ ehca_show_debug_level, ehca_store_debug_level);
+
+static ssize_t ehca_show_flightrecorder(struct device_driver *ddp,
+ char *buf)
+{
+ /* this is not style compliant, but snprintf is not fast enough */
+ u64 *lbuf = (u64 *) buf;
+ lbuf[0] = (u64) & ehca_flightrecorder;
+ lbuf[1] = EHCA_FLIGHTRECORDER_SIZE;
+ lbuf[2] = atomic_read(&ehca_flightrecorder_index);
+ return sizeof(u64) * 3;
+}
+DRIVER_ATTR(flightrecorder, S_IRUSR, ehca_show_flightrecorder, 0);
+
+void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
+{
+ driver_create_file(&drv->driver, &driver_attr_debug_level);
+ driver_create_file(&drv->driver, &driver_attr_flightrecorder);
+}
+
+void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
+{
+ driver_remove_file(&drv->driver, &driver_attr_debug_level);
+ driver_remove_file(&drv->driver, &driver_attr_flightrecorder);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
+#define EHCA_RESOURCE_ATTR_H(name) \
+static ssize_t ehca_show_##name(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf)
+#else
+#define EHCA_RESOURCE_ATTR_H(name) \
+static ssize_t ehca_show_##name(struct device *dev, \
+ char *buf)
+#endif
+
+#define EHCA_RESOURCE_ATTR(name) \
+EHCA_RESOURCE_ATTR_H(name) \
+{ \
+ struct ehca_shca *shca; \
+ struct query_hca_rblock *rblock; \
+ int len; \
+ \
+ shca = dev->driver_data; \
+ \
+ rblock = kmalloc(PAGE_SIZE, GFP_KERNEL); \
+ if (rblock == NULL) { \
+ EDEB_ERR(4, "Can't allocate rblock memory."); \
+ return 0; \
+ } \
+ \
+ memset(rblock, 0, PAGE_SIZE); \
+ \
+ if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_Success) { \
+ EDEB_ERR(4, "Can't query device properties"); \
+ kfree(rblock); \
+ return 0; \
+ } \
+ \
+ if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
+ len = snprintf(buf, 256, "1"); \
+ else \
+ len = snprintf(buf, 256, "%d", rblock->name); \
+ \
+ if (len < 0) \
+ return 0; \
+ buf[len] = '\n'; \
+ buf[len+1] = 0; \
+ \
+ kfree(rblock); \
+ \
+ return len+1; \
+} \
+static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
+
+EHCA_RESOURCE_ATTR(num_ports);
+EHCA_RESOURCE_ATTR(hw_ver);
+EHCA_RESOURCE_ATTR(max_eq);
+EHCA_RESOURCE_ATTR(cur_eq);
+EHCA_RESOURCE_ATTR(max_cq);
+EHCA_RESOURCE_ATTR(cur_cq);
+EHCA_RESOURCE_ATTR(max_qp);
+EHCA_RESOURCE_ATTR(cur_qp);
+EHCA_RESOURCE_ATTR(max_mr);
+EHCA_RESOURCE_ATTR(cur_mr);
+EHCA_RESOURCE_ATTR(max_mw);
+EHCA_RESOURCE_ATTR(cur_mw);
+EHCA_RESOURCE_ATTR(max_pd);
+EHCA_RESOURCE_ATTR(max_ah);
+
+static ssize_t ehca_show_adapter_handle(struct device *dev,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
+ struct device_attribute *attr,
+#endif
+ char *buf)
+{
+ struct ehca_shca *shca = dev->driver_data;
+
+ return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
+
+}
+static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
+
+
+
+void ehca_create_device_sysfs(struct ibmebus_dev *dev)
+{
+ device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
+ device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
+ device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
+ device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
+ device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
+ device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
+ device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
+ device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
+ device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
+}
+
+void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
+{
+ device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
+}
+
+/**
+ * ehca_probe - TODO
+ */
+static int __devinit ehca_probe(struct ibmebus_dev *dev,
+ const struct of_device_id *id)
+{
+ struct ehca_shca *shca;
+ u64 *handle;
+ struct ib_pd *ibpd;
+ int ret = 0;
+
+ EDEB_EN(7, "name=%s", dev->name);
+
+ handle = (u64 *)get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
+ if (!handle) {
+ EDEB_ERR(4, "Cannot get eHCA handle for adapter: %s.",
+ dev->ofdev.node->full_name);
+ return -ENODEV;
+ }
+
+ if (!(*handle)) {
+ EDEB_ERR(4, "Wrong eHCA handle for adapter: %s.",
+ dev->ofdev.node->full_name);
+ return -ENODEV;
+ }
+
+ shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
+ if (shca == NULL) {
+ EDEB_ERR(4, "Cannot allocate shca memory.");
+ return -ENOMEM;
+ }
+
+ shca->ibmebus_dev = dev;
+ shca->ipz_hca_handle.handle = *handle;
+ dev->ofdev.dev.driver_data = shca;
+
+ ret = ehca_sense_attributes(shca);
+ if (ret < 0) {
+ EDEB_ERR(4, "Cannot sense eHCA attributes.");
+ goto probe1;
+ }
+
+ /* create event queues */
+ ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot create EQ.");
+ goto probe1;
+ }
+
+ ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot create NEQ.");
+ goto probe2;
+ }
+
+ /* create internal protection domain */
+ ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), 0);
+ if (IS_ERR(ibpd)) {
+ EDEB_ERR(4, "Cannot create internal PD.");
+ ret = PTR_ERR(ibpd);
+ goto probe3;
+ }
+
+ shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
+ shca->pd->ib_pd.device = &shca->ib_device;
+
+ /* create internal max MR */
+ if (shca->maxmr == 0) {
+ struct ehca_mr *e_maxmr = 0;
+ ret = ehca_reg_internal_maxmr(shca, shca->pd, &e_maxmr);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot create internal MR. ret=%x", ret);
+ goto probe4;
+ }
+ shca->maxmr = e_maxmr;
+ }
+
+ ret = ehca_register_device(shca);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot register Infiniband device.");
+ goto probe5;
+ }
+
+ /* create AQP1 for port 1 */
+ if (ehca_open_aqp1 == 1) {
+ shca->sport[0].port_state = IB_PORT_DOWN;
+ ret = ehca_create_aqp1(shca, 1);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot create AQP1 for port 1.");
+ goto probe6;
+ }
+ }
+
+ /* create AQP1 for port 2 */
+ if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
+ shca->sport[1].port_state = IB_PORT_DOWN;
+ ret = ehca_create_aqp1(shca, 2);
+ if (ret != 0) {
+ EDEB_ERR(4, "Cannot create AQP1 for port 2.");
+ goto probe7;
+ }
+ }
+
+ ehca_create_device_sysfs(dev);
+
+ spin_lock(&ehca_module.shca_lock);
+ list_add(&shca->shca_list, &ehca_module.shca_list);
+ spin_unlock(&ehca_module.shca_lock);
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return 0;
+
+ probe7:
+ ret = ehca_destroy_aqp1(&shca->sport[0]);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy AQP1 for port 1. ret=%x", ret);
+
+ probe6:
+ ib_unregister_device(&shca->ib_device);
+
+ probe5:
+ ret = ehca_dereg_internal_maxmr(shca);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy internal MR. ret=%x", ret);
+
+ probe4:
+ ret = ehca_dealloc_pd(&shca->pd->ib_pd);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy internal PD. ret=%x", ret);
+
+ probe3:
+ ret = ehca_destroy_eq(shca, &shca->neq);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy NEQ. ret=%x", ret);
+
+ probe2:
+ ret = ehca_destroy_eq(shca, &shca->eq);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy EQ. ret=%x", ret);
+
+ probe1:
+ ib_dealloc_device(&shca->ib_device);
+
+ EDEB_EX(4, "ret=%x", ret);
+
+ return -EINVAL;
+}
+
+static int __devexit ehca_remove(struct ibmebus_dev *dev)
+{
+ struct ehca_shca *shca = dev->ofdev.dev.driver_data;
+ int ret;
+
+ EDEB_EN(7, "shca=%p", shca);
+
+ ehca_remove_device_sysfs(dev);
+
+ if (ehca_open_aqp1 == 1) {
+ int i;
+
+ for (i = 0; i < shca->num_ports; i++) {
+ ret = ehca_destroy_aqp1(&shca->sport[i]);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy AQP1 for port %x."
+ " ret=%x", ret, i);
+ }
+ }
+
+ ib_unregister_device(&shca->ib_device);
+
+ ret = ehca_dereg_internal_maxmr(shca);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy internal MR. ret=%x", ret);
+
+ ret = ehca_dealloc_pd(&shca->pd->ib_pd);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy internal PD. ret=%x", ret);
+
+ ret = ehca_destroy_eq(shca, &shca->eq);
+ if (ret != 0)
+ EDEB_ERR(4, "Cannot destroy EQ. ret=%x", ret);
+
+ ret = ehca_destroy_eq(shca, &shca->neq);
+ if (ret != 0)
+ EDEB_ERR(4, "Canot destroy NEQ. ret=%x", ret);
+
+ ib_dealloc_device(&shca->ib_device);
+
+ spin_lock(&ehca_module.shca_lock);
+ list_del(&shca->shca_list);
+ spin_unlock(&ehca_module.shca_lock);
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+}
+
+static struct of_device_id ehca_device_table[] =
+{
+ {
+ .name = "lhca",
+ .compatible = "IBM,lhca",
+ },
+ {},
+};
+
+static struct ibmebus_driver ehca_driver = {
+ .name = "ehca",
+ .id_table = ehca_device_table,
+ .probe = ehca_probe,
+ .remove = ehca_remove,
+};
+
+/**
+ * ehca_module_init - eHCA initialization routine.
+ */
+int __init ehca_module_init(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "eHCA Infiniband Device Driver "
+ "(Rel.: EHCA2_0047)\n");
+ EDEB_EN(7, "");
+
+ idr_init(&ehca_qp_idr);
+ idr_init(&ehca_cq_idr);
+
+ INIT_LIST_HEAD(&ehca_module.shca_list);
+ spin_lock_init(&ehca_module.shca_lock);
+
+ ehca_init_trace();
+ ehca_init_flight();
+
+ ehca_wq = create_workqueue("ehca");
+ if (ehca_wq == NULL) {
+ EDEB_ERR(4, "Cannot create workqueue.");
+ ret = -ENOMEM;
+ goto module_init0;
+ }
+
+ if ((ret = ehca_caches_create(&ehca_module)) != 0) {
+ ehca_catastrophic("Cannot create SLAB caches");
+ ret = -ENOMEM;
+ goto module_init1;
+ }
+
+ if ((ret = ibmebus_register_driver(&ehca_driver)) != 0) {
+ ehca_catastrophic("Cannot register eHCA device driver");
+ ret = -EINVAL;
+ goto module_init2;
+ }
+
+ ehca_create_driver_sysfs(&ehca_driver);
+
+ if (ehca_poll_all_eqs != 1) {
+ EDEB_ERR(4, "WARNING!!!");
+ EDEB_ERR(4, "It is possible to lose interrupts.");
+
+ return 0;
+ }
+
+ ehca_kthread_eq = kthread_create(ehca_poll_eqs, &ehca_module,
+ "ehca_poll_eqs");
+ if (IS_ERR(ehca_kthread_eq)) {
+ EDEB_ERR(4, "Cannot create kthread_eq");
+ ret = PTR_ERR(ehca_kthread_eq);
+ goto module_init3;
+ }
+
+ wake_up_process(ehca_kthread_eq);
+
+ EDEB_EX(7, "ret=%x", ret);
+
+ return 0;
+
+ module_init3:
+ ehca_remove_driver_sysfs(&ehca_driver);
+ ibmebus_unregister_driver(&ehca_driver);
+
+ module_init2:
+ ehca_caches_destroy(&ehca_module);
+
+ module_init1:
+ destroy_workqueue(ehca_wq);
+
+ module_init0:
+ EDEB_EX(7, "ret=%x", ret);
+
+ return ret;
+};
+
+/**
+ * ehca_module_exit - eHCA exit routine.
+ */
+void __exit ehca_module_exit(void)
+{
+ EDEB_EN(7, "");
+
+ if (ehca_poll_all_eqs == 1)
+ kthread_stop(ehca_kthread_eq);
+
+ ehca_remove_driver_sysfs(&ehca_driver);
+ ibmebus_unregister_driver(&ehca_driver);
+
+ if (ehca_caches_destroy(&ehca_module) != 0)
+ ehca_catastrophic("Cannot destroy SLAB caches");
+
+ destroy_workqueue(ehca_wq);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
+ idr_destroy_ext(&ehca_cq_idr);
+ idr_destroy_ext(&ehca_qp_idr);
+#else
+ idr_destroy(&ehca_cq_idr);
+ idr_destroy(&ehca_qp_idr);
+#endif
+
+ EDEB_EX(7, "");
+};
+
+module_init(ehca_module_init);
+module_exit(ehca_module_exit);
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