[openib-general] [PATCH 14 of 16] ipath - misc infiniband code, part 2
Bryan O'Sullivan
bos at pathscale.com
Wed Mar 29 15:23:37 PST 2006
Management datagram support, queue pairs, and reliable and unreliable
connections.
Signed-off-by: Bryan O'Sullivan <bos at pathscale.com>
diff -r cdde68b1f32c -r 8c8c2341604a drivers/infiniband/hw/ipath/ipath_mad.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_mad.c Wed Mar 29 15:21:27 2006 -0800
@@ -0,0 +1,1352 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_smi.h>
+
+#include "ipath_kernel.h"
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+#define IB_SMP_UNSUP_VERSION __constant_htons(0x0004)
+#define IB_SMP_UNSUP_METHOD __constant_htons(0x0008)
+#define IB_SMP_UNSUP_METH_ATTR __constant_htons(0x000C)
+#define IB_SMP_INVALID_FIELD __constant_htons(0x001C)
+
+static int reply(struct ib_smp *smp)
+{
+ /*
+ * The verbs framework will handle the directed/LID route
+ * packet changes.
+ */
+ smp->method = IB_MGMT_METHOD_GET_RESP;
+ if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ smp->status |= IB_SMP_DIRECTION;
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+static int recv_subn_get_nodedescription(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ if (smp->attr_mod)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ strncpy(smp->data, ibdev->node_desc, sizeof(smp->data));
+
+ return reply(smp);
+}
+
+struct nodeinfo {
+ u8 base_version;
+ u8 class_version;
+ u8 node_type;
+ u8 num_ports;
+ __be64 sys_guid;
+ __be64 node_guid;
+ __be64 port_guid;
+ __be16 partition_cap;
+ __be16 device_id;
+ __be32 revision;
+ u8 local_port_num;
+ u8 vendor_id[3];
+} __attribute__ ((packed));
+
+static int recv_subn_get_nodeinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct nodeinfo *nip = (struct nodeinfo *)&smp->data;
+ struct ipath_devdata *dd = to_idev(ibdev)->dd;
+ u32 vendor, boardid, majrev, minrev;
+
+ if (smp->attr_mod)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ nip->base_version = 1;
+ nip->class_version = 1;
+ nip->node_type = 1; /* channel adapter */
+ /*
+ * XXX The num_ports value will need a layer function to get
+ * the value if we ever have more than one IB port on a chip.
+ * We will also need to get the GUID for the port.
+ */
+ nip->num_ports = ibdev->phys_port_cnt;
+ /* This is already in network order */
+ nip->sys_guid = to_idev(ibdev)->sys_image_guid;
+ nip->node_guid = ipath_layer_get_guid(dd);
+ nip->port_guid = nip->sys_guid;
+ nip->partition_cap = cpu_to_be16(ipath_layer_get_npkeys(dd));
+ nip->device_id = cpu_to_be16(ipath_layer_get_deviceid(dd));
+ ipath_layer_query_device(dd, &vendor, &boardid, &majrev, &minrev);
+ nip->revision = cpu_to_be32((majrev << 16) | minrev);
+ nip->local_port_num = port;
+ nip->vendor_id[0] = 0;
+ nip->vendor_id[1] = vendor >> 8;
+ nip->vendor_id[2] = vendor;
+
+ return reply(smp);
+}
+
+static int recv_subn_get_guidinfo(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
+ __be64 *p = (__be64 *) smp->data;
+
+ /* 32 blocks of 8 64-bit GUIDs per block */
+
+ memset(smp->data, 0, sizeof(smp->data));
+
+ /*
+ * We only support one GUID for now. If this changes, the
+ * portinfo.guid_cap field needs to be updated too.
+ */
+ if (startgx == 0)
+ /* The first is a copy of the read-only HW GUID. */
+ *p = ipath_layer_get_guid(to_idev(ibdev)->dd);
+ else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return reply(smp);
+}
+
+struct port_info {
+ __be64 mkey;
+ __be64 gid_prefix;
+ __be16 lid;
+ __be16 sm_lid;
+ __be32 cap_mask;
+ __be16 diag_code;
+ __be16 mkey_lease_period;
+ u8 local_port_num;
+ u8 link_width_enabled;
+ u8 link_width_supported;
+ u8 link_width_active;
+ u8 linkspeed_portstate; /* 4 bits, 4 bits */
+ u8 portphysstate_linkdown; /* 4 bits, 4 bits */
+ u8 mkeyprot_resv_lmc; /* 2 bits, 3, 3 */
+ u8 linkspeedactive_enabled; /* 4 bits, 4 bits */
+ u8 neighbormtu_mastersmsl; /* 4 bits, 4 bits */
+ u8 vlcap_inittype; /* 4 bits, 4 bits */
+ u8 vl_high_limit;
+ u8 vl_arb_high_cap;
+ u8 vl_arb_low_cap;
+ u8 inittypereply_mtucap; /* 4 bits, 4 bits */
+ u8 vlstallcnt_hoqlife; /* 3 bits, 5 bits */
+ u8 operationalvl_pei_peo_fpi_fpo; /* 4 bits, 1, 1, 1, 1 */
+ __be16 mkey_violations;
+ __be16 pkey_violations;
+ __be16 qkey_violations;
+ u8 guid_cap;
+ u8 clientrereg_resv_subnetto; /* 1 bit, 2 bits, 5 */
+ u8 resv_resptimevalue; /* 3 bits, 5 bits */
+ u8 localphyerrors_overrunerrors; /* 4 bits, 4 bits */
+ __be16 max_credit_hint;
+ u8 resv;
+ u8 link_roundtrip_latency[3];
+} __attribute__ ((packed));
+
+static int recv_subn_get_portinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ipath_ibdev *dev;
+ struct port_info *pip = (struct port_info *)smp->data;
+ u16 lid;
+ u8 ibcstat;
+ u8 mtu;
+ int ret;
+
+ if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ ret = reply(smp);
+ goto bail;
+ }
+
+ dev = to_idev(ibdev);
+
+ /* Clear all fields. Only set the non-zero fields. */
+ memset(smp->data, 0, sizeof(smp->data));
+
+ /* Only return the mkey if the protection field allows it. */
+ if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
+ (dev->mkeyprot_resv_lmc >> 6) == 0)
+ pip->mkey = dev->mkey;
+ pip->gid_prefix = dev->gid_prefix;
+ lid = ipath_layer_get_lid(dev->dd);
+ pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
+ pip->sm_lid = cpu_to_be16(dev->sm_lid);
+ pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
+ /* pip->diag_code; */
+ pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
+ pip->local_port_num = port;
+ pip->link_width_enabled = dev->link_width_enabled;
+ pip->link_width_supported = 3; /* 1x or 4x */
+ pip->link_width_active = 2; /* 4x */
+ pip->linkspeed_portstate = 0x10; /* 2.5Gbps */
+ ibcstat = ipath_layer_get_lastibcstat(dev->dd);
+ pip->linkspeed_portstate |= ((ibcstat >> 4) & 0x3) + 1;
+ pip->portphysstate_linkdown =
+ (ipath_cvt_physportstate[ibcstat & 0xf] << 4) |
+ (ipath_layer_get_linkdowndefaultstate(dev->dd) ? 1 : 2);
+ pip->mkeyprot_resv_lmc = dev->mkeyprot_resv_lmc;
+ pip->linkspeedactive_enabled = 0x11; /* 2.5Gbps, 2.5Gbps */
+ switch (ipath_layer_get_ibmtu(dev->dd)) {
+ case 4096:
+ mtu = IB_MTU_4096;
+ break;
+ case 2048:
+ mtu = IB_MTU_2048;
+ break;
+ case 1024:
+ mtu = IB_MTU_1024;
+ break;
+ case 512:
+ mtu = IB_MTU_512;
+ break;
+ case 256:
+ mtu = IB_MTU_256;
+ break;
+ default: /* oops, something is wrong */
+ mtu = IB_MTU_2048;
+ break;
+ }
+ pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
+ pip->vlcap_inittype = 0x10; /* VLCap = VL0, InitType = 0 */
+ pip->vl_high_limit = dev->vl_high_limit;
+ /* pip->vl_arb_high_cap; // only one VL */
+ /* pip->vl_arb_low_cap; // only one VL */
+ /* InitTypeReply = 0 */
+ pip->inittypereply_mtucap = IB_MTU_4096;
+ // HCAs ignore VLStallCount and HOQLife
+ /* pip->vlstallcnt_hoqlife; */
+ pip->operationalvl_pei_peo_fpi_fpo = 0x10; /* OVLs = 1 */
+ pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
+ /* P_KeyViolations are counted by hardware. */
+ pip->pkey_violations =
+ cpu_to_be16((ipath_layer_get_cr_errpkey(dev->dd) -
+ dev->n_pkey_violations) & 0xFFFF);
+ pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
+ /* Only the hardware GUID is supported for now */
+ pip->guid_cap = 1;
+ pip->clientrereg_resv_subnetto = dev->subnet_timeout;
+ /* 32.768 usec. response time (guessing) */
+ pip->resv_resptimevalue = 3;
+ pip->localphyerrors_overrunerrors =
+ (ipath_layer_get_phyerrthreshold(dev->dd) << 4) |
+ ipath_layer_get_overrunthreshold(dev->dd);
+ /* pip->max_credit_hint; */
+ /* pip->link_roundtrip_latency[3]; */
+
+ ret = reply(smp);
+
+bail:
+ return ret;
+}
+
+static int recv_subn_get_pkeytable(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
+ u16 *p = (u16 *) smp->data;
+ __be16 *q = (__be16 *) smp->data;
+
+ /* 64 blocks of 32 16-bit P_Key entries */
+
+ memset(smp->data, 0, sizeof(smp->data));
+ if (startpx == 0) {
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned i, n = ipath_layer_get_npkeys(dev->dd);
+
+ ipath_layer_get_pkeys(dev->dd, p);
+
+ for (i = 0; i < n; i++)
+ q[i] = cpu_to_be16(p[i]);
+ } else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return reply(smp);
+}
+
+static int recv_subn_set_guidinfo(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ /* The only GUID we support is the first read-only entry. */
+ return recv_subn_get_guidinfo(smp, ibdev);
+}
+
+/**
+ * recv_subn_set_portinfo - set port information
+ * @smp: the incoming SM packet
+ * @ibdev: the infiniband device
+ * @port: the port on the device
+ *
+ * Set Portinfo (see ch. 14.2.5.6).
+ */
+static int recv_subn_set_portinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct port_info *pip = (struct port_info *)smp->data;
+ struct ib_event event;
+ struct ipath_ibdev *dev;
+ u32 flags;
+ char clientrereg = 0;
+ u16 lid, smlid;
+ u8 lwe;
+ u8 lse;
+ u8 state;
+ u16 lstate;
+ u32 mtu;
+ int ret;
+
+ if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
+ goto err;
+
+ dev = to_idev(ibdev);
+ event.device = ibdev;
+ event.element.port_num = port;
+
+ dev->mkey = pip->mkey;
+ dev->gid_prefix = pip->gid_prefix;
+ dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
+
+ lid = be16_to_cpu(pip->lid);
+ if (lid != ipath_layer_get_lid(dev->dd)) {
+ /* Must be a valid unicast LID address. */
+ if (lid == 0 || lid >= IPS_MULTICAST_LID_BASE)
+ goto err;
+ ipath_set_sps_lid(dev->dd, lid, pip->mkeyprot_resv_lmc & 7);
+ event.event = IB_EVENT_LID_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ smlid = be16_to_cpu(pip->sm_lid);
+ if (smlid != dev->sm_lid) {
+ /* Must be a valid unicast LID address. */
+ if (smlid == 0 || smlid >= IPS_MULTICAST_LID_BASE)
+ goto err;
+ dev->sm_lid = smlid;
+ event.event = IB_EVENT_SM_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ /* Only 4x supported but allow 1x or 4x to be set (see 14.2.6.6). */
+ lwe = pip->link_width_enabled;
+ if ((lwe >= 4 && lwe <= 8) || (lwe >= 0xC && lwe <= 0xFE))
+ goto err;
+ if (lwe == 0xFF)
+ dev->link_width_enabled = 3; /* 1x or 4x */
+ else if (lwe)
+ dev->link_width_enabled = lwe;
+
+ /* Only 2.5 Gbs supported. */
+ lse = pip->linkspeedactive_enabled & 0xF;
+ if (lse >= 2 && lse <= 0xE)
+ goto err;
+
+ /* Set link down default state. */
+ switch (pip->portphysstate_linkdown & 0xF) {
+ case 0: /* NOP */
+ break;
+ case 1: /* SLEEP */
+ if (ipath_layer_set_linkdowndefaultstate(dev->dd, 1))
+ goto err;
+ break;
+ case 2: /* POLL */
+ if (ipath_layer_set_linkdowndefaultstate(dev->dd, 0))
+ goto err;
+ break;
+ default:
+ goto err;
+ }
+
+ dev->mkeyprot_resv_lmc = pip->mkeyprot_resv_lmc;
+ dev->vl_high_limit = pip->vl_high_limit;
+
+ switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
+ case IB_MTU_256:
+ mtu = 256;
+ break;
+ case IB_MTU_512:
+ mtu = 512;
+ break;
+ case IB_MTU_1024:
+ mtu = 1024;
+ break;
+ case IB_MTU_2048:
+ mtu = 2048;
+ break;
+ case IB_MTU_4096:
+ mtu = 4096;
+ break;
+ default:
+ /* XXX We have already partially updated our state! */
+ goto err;
+ }
+ ipath_layer_set_mtu(dev->dd, mtu);
+
+ dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
+
+ /* We only support VL0 */
+ if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
+ goto err;
+
+ if (pip->mkey_violations == 0)
+ dev->mkey_violations = 0;
+
+ /*
+ * Hardware counter can't be reset so snapshot and subtract
+ * later.
+ */
+ if (pip->pkey_violations == 0)
+ dev->n_pkey_violations =
+ ipath_layer_get_cr_errpkey(dev->dd);
+
+ if (pip->qkey_violations == 0)
+ dev->qkey_violations = 0;
+
+ if (ipath_layer_set_phyerrthreshold(
+ dev->dd,
+ (pip->localphyerrors_overrunerrors >> 4) & 0xF))
+ goto err;
+
+ if (ipath_layer_set_overrunthreshold(
+ dev->dd,
+ (pip->localphyerrors_overrunerrors & 0xF)))
+ goto err;
+
+ dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
+
+ if (pip->clientrereg_resv_subnetto & 0x80) {
+ clientrereg = 1;
+ event.event = IB_EVENT_LID_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ /*
+ * Do the port state change now that the other link parameters
+ * have been set.
+ * Changing the port physical state only makes sense if the link
+ * is down or is being set to down.
+ */
+ state = pip->linkspeed_portstate & 0xF;
+ flags = ipath_layer_get_flags(dev->dd);
+ lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
+ if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
+ goto err;
+
+ /*
+ * Only state changes of DOWN, ARM, and ACTIVE are valid
+ * and must be in the correct state to take effect (see 7.2.6).
+ */
+ switch (state) {
+ case IB_PORT_NOP:
+ if (lstate == 0)
+ break;
+ /* FALLTHROUGH */
+ case IB_PORT_DOWN:
+ if (lstate == 0)
+ if (ipath_layer_get_linkdowndefaultstate(dev->dd))
+ lstate = IPATH_IB_LINKDOWN_SLEEP;
+ else
+ lstate = IPATH_IB_LINKDOWN;
+ else if (lstate == 1)
+ lstate = IPATH_IB_LINKDOWN_SLEEP;
+ else if (lstate == 2)
+ lstate = IPATH_IB_LINKDOWN;
+ else if (lstate == 3)
+ lstate = IPATH_IB_LINKDOWN_DISABLE;
+ else
+ goto err;
+ ipath_layer_set_linkstate(dev->dd, lstate);
+ if (flags & IPATH_LINKACTIVE) {
+ event.event = IB_EVENT_PORT_ERR;
+ ib_dispatch_event(&event);
+ }
+ break;
+ case IB_PORT_ARMED:
+ if (!(flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
+ break;
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKARM);
+ if (flags & IPATH_LINKACTIVE) {
+ event.event = IB_EVENT_PORT_ERR;
+ ib_dispatch_event(&event);
+ }
+ break;
+ case IB_PORT_ACTIVE:
+ if (!(flags & IPATH_LINKARMED))
+ break;
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKACTIVE);
+ event.event = IB_EVENT_PORT_ACTIVE;
+ ib_dispatch_event(&event);
+ break;
+ default:
+ /* XXX We have already partially updated our state! */
+ goto err;
+ }
+
+ ret = recv_subn_get_portinfo(smp, ibdev, port);
+
+ if (clientrereg)
+ pip->clientrereg_resv_subnetto |= 0x80;
+
+ goto done;
+
+err:
+ smp->status |= IB_SMP_INVALID_FIELD;
+ ret = recv_subn_get_portinfo(smp, ibdev, port);
+
+done:
+ return ret;
+}
+
+static int recv_subn_set_pkeytable(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
+ __be16 *p = (__be16 *) smp->data;
+ u16 *q = (u16 *) smp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned i, n = ipath_layer_get_npkeys(dev->dd);
+
+ for (i = 0; i < n; i++)
+ q[i] = be16_to_cpu(p[i]);
+
+ if (startpx != 0 ||
+ ipath_layer_set_pkeys(dev->dd, q) != 0)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return recv_subn_get_pkeytable(smp, ibdev);
+}
+
+#define IB_PMA_CLASS_PORT_INFO __constant_htons(0x0001)
+#define IB_PMA_PORT_SAMPLES_CONTROL __constant_htons(0x0010)
+#define IB_PMA_PORT_SAMPLES_RESULT __constant_htons(0x0011)
+#define IB_PMA_PORT_COUNTERS __constant_htons(0x0012)
+#define IB_PMA_PORT_COUNTERS_EXT __constant_htons(0x001D)
+#define IB_PMA_PORT_SAMPLES_RESULT_EXT __constant_htons(0x001E)
+
+struct ib_perf {
+ u8 base_version;
+ u8 mgmt_class;
+ u8 class_version;
+ u8 method;
+ __be16 status;
+ __be16 unused;
+ __be64 tid;
+ __be16 attr_id;
+ __be16 resv;
+ __be32 attr_mod;
+ u8 reserved[40];
+ u8 data[192];
+} __attribute__ ((packed));
+
+struct ib_pma_classportinfo {
+ u8 base_version;
+ u8 class_version;
+ __be16 cap_mask;
+ u8 reserved[3];
+ u8 resp_time_value; /* only lower 5 bits */
+ union ib_gid redirect_gid;
+ __be32 redirect_tc_sl_fl; /* 8, 4, 20 bits respectively */
+ __be16 redirect_lid;
+ __be16 redirect_pkey;
+ __be32 redirect_qp; /* only lower 24 bits */
+ __be32 redirect_qkey;
+ union ib_gid trap_gid;
+ __be32 trap_tc_sl_fl; /* 8, 4, 20 bits respectively */
+ __be16 trap_lid;
+ __be16 trap_pkey;
+ __be32 trap_hl_qp; /* 8, 24 bits respectively */
+ __be32 trap_qkey;
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplescontrol {
+ u8 opcode;
+ u8 port_select;
+ u8 tick;
+ u8 counter_width; /* only lower 3 bits */
+ __be32 counter_mask0_9; /* 2, 10 * 3, bits */
+ __be16 counter_mask10_14; /* 1, 5 * 3, bits */
+ u8 sample_mechanisms;
+ u8 sample_status; /* only lower 2 bits */
+ __be64 option_mask;
+ __be64 vendor_mask;
+ __be32 sample_start;
+ __be32 sample_interval;
+ __be16 tag;
+ __be16 counter_select[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplesresult {
+ __be16 tag;
+ __be16 sample_status; /* only lower 2 bits */
+ __be32 counter[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplesresult_ext {
+ __be16 tag;
+ __be16 sample_status; /* only lower 2 bits */
+ __be32 extended_width; /* only upper 2 bits */
+ __be64 counter[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portcounters {
+ u8 reserved;
+ u8 port_select;
+ __be16 counter_select;
+ __be16 symbol_error_counter;
+ u8 link_error_recovery_counter;
+ u8 link_downed_counter;
+ __be16 port_rcv_errors;
+ __be16 port_rcv_remphys_errors;
+ __be16 port_rcv_switch_relay_errors;
+ __be16 port_xmit_discards;
+ u8 port_xmit_constraint_errors;
+ u8 port_rcv_constraint_errors;
+ u8 reserved1;
+ u8 lli_ebor_errors; /* 4, 4, bits */
+ __be16 reserved2;
+ __be16 vl15_dropped;
+ __be32 port_xmit_data;
+ __be32 port_rcv_data;
+ __be32 port_xmit_packets;
+ __be32 port_rcv_packets;
+} __attribute__ ((packed));
+
+#define IB_PMA_SEL_SYMBOL_ERROR __constant_htons(0x0001)
+#define IB_PMA_SEL_LINK_ERROR_RECOVERY __constant_htons(0x0002)
+#define IB_PMA_SEL_LINK_DOWNED __constant_htons(0x0004)
+#define IB_PMA_SEL_PORT_RCV_ERRORS __constant_htons(0x0008)
+#define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS __constant_htons(0x0010)
+#define IB_PMA_SEL_PORT_XMIT_DISCARDS __constant_htons(0x0040)
+#define IB_PMA_SEL_PORT_XMIT_DATA __constant_htons(0x1000)
+#define IB_PMA_SEL_PORT_RCV_DATA __constant_htons(0x2000)
+#define IB_PMA_SEL_PORT_XMIT_PACKETS __constant_htons(0x4000)
+#define IB_PMA_SEL_PORT_RCV_PACKETS __constant_htons(0x8000)
+
+struct ib_pma_portcounters_ext {
+ u8 reserved;
+ u8 port_select;
+ __be16 counter_select;
+ __be32 reserved1;
+ __be64 port_xmit_data;
+ __be64 port_rcv_data;
+ __be64 port_xmit_packets;
+ __be64 port_rcv_packets;
+ __be64 port_unicast_xmit_packets;
+ __be64 port_unicast_rcv_packets;
+ __be64 port_multicast_xmit_packets;
+ __be64 port_multicast_rcv_packets;
+} __attribute__ ((packed));
+
+#define IB_PMA_SELX_PORT_XMIT_DATA __constant_htons(0x0001)
+#define IB_PMA_SELX_PORT_RCV_DATA __constant_htons(0x0002)
+#define IB_PMA_SELX_PORT_XMIT_PACKETS __constant_htons(0x0004)
+#define IB_PMA_SELX_PORT_RCV_PACKETS __constant_htons(0x0008)
+#define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS __constant_htons(0x0010)
+#define IB_PMA_SELX_PORT_UNI_RCV_PACKETS __constant_htons(0x0020)
+#define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS __constant_htons(0x0040)
+#define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS __constant_htons(0x0080)
+
+static int recv_pma_get_classportinfo(struct ib_perf *pmp)
+{
+ struct ib_pma_classportinfo *p =
+ (struct ib_pma_classportinfo *)pmp->data;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ if (pmp->attr_mod != 0)
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ /* Indicate AllPortSelect is valid (only one port anyway) */
+ p->cap_mask = __constant_cpu_to_be16(1 << 8);
+ p->base_version = 1;
+ p->class_version = 1;
+ /*
+ * Expected response time is 4.096 usec. * 2^18 == 1.073741824
+ * sec.
+ */
+ p->resp_time_value = 18;
+
+ return reply((struct ib_smp *) pmp);
+}
+
+/*
+ * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
+ * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
+ * We support 5 counters which only count the mandatory quantities.
+ */
+#define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
+#define COUNTER_MASK0_9 \
+ __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
+ COUNTER_MASK(1, 1) | \
+ COUNTER_MASK(1, 2) | \
+ COUNTER_MASK(1, 3) | \
+ COUNTER_MASK(1, 4))
+
+static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portsamplescontrol *p =
+ (struct ib_pma_portsamplescontrol *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned long flags;
+ u8 port_select = p->port_select;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+ /*
+ * Ticks are 10x the link transfer period which for 2.5Gbs is 4
+ * nsec. 0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec. Sample
+ * intervals are counted in ticks. Since we use Linux timers, that
+ * count in jiffies, we can't sample for less than 1000 ticks if HZ
+ * == 1000 (4000 ticks if HZ is 250).
+ */
+ /* XXX This is WRONG. */
+ p->tick = 250; /* 1 usec. */
+ p->counter_width = 4; /* 32 bit counters */
+ p->counter_mask0_9 = COUNTER_MASK0_9;
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ p->sample_status = dev->pma_sample_status;
+ p->sample_start = cpu_to_be32(dev->pma_sample_start);
+ p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->counter_select[0] = dev->pma_counter_select[0];
+ p->counter_select[1] = dev->pma_counter_select[1];
+ p->counter_select[2] = dev->pma_counter_select[2];
+ p->counter_select[3] = dev->pma_counter_select[3];
+ p->counter_select[4] = dev->pma_counter_select[4];
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portsamplescontrol *p =
+ (struct ib_pma_portsamplescontrol *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned long flags;
+ u32 start;
+ int ret;
+
+ if (pmp->attr_mod != 0 ||
+ (p->port_select != port && p->port_select != 0xFF)) {
+ pmp->status |= IB_SMP_INVALID_FIELD;
+ ret = reply((struct ib_smp *) pmp);
+ goto bail;
+ }
+
+ start = be32_to_cpu(p->sample_start);
+ if (start != 0) {
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_DONE) {
+ dev->pma_sample_status =
+ IB_PMA_SAMPLE_STATUS_STARTED;
+ dev->pma_sample_start = start;
+ dev->pma_sample_interval =
+ be32_to_cpu(p->sample_interval);
+ dev->pma_tag = be16_to_cpu(p->tag);
+ if (p->counter_select[0])
+ dev->pma_counter_select[0] =
+ p->counter_select[0];
+ if (p->counter_select[1])
+ dev->pma_counter_select[1] =
+ p->counter_select[1];
+ if (p->counter_select[2])
+ dev->pma_counter_select[2] =
+ p->counter_select[2];
+ if (p->counter_select[3])
+ dev->pma_counter_select[3] =
+ p->counter_select[3];
+ if (p->counter_select[4])
+ dev->pma_counter_select[4] =
+ p->counter_select[4];
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ }
+ ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
+
+bail:
+ return ret;
+}
+
+static u64 get_counter(struct ipath_ibdev *dev, __be16 sel)
+{
+ u64 ret;
+
+ switch (sel) {
+ case IB_PMA_PORT_XMIT_DATA:
+ ret = dev->ipath_sword;
+ break;
+ case IB_PMA_PORT_RCV_DATA:
+ ret = dev->ipath_rword;
+ break;
+ case IB_PMA_PORT_XMIT_PKTS:
+ ret = dev->ipath_spkts;
+ break;
+ case IB_PMA_PORT_RCV_PKTS:
+ ret = dev->ipath_rpkts;
+ break;
+ case IB_PMA_PORT_XMIT_WAIT:
+ ret = dev->ipath_xmit_wait;
+ break;
+ default:
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
+ struct ib_device *ibdev)
+{
+ struct ib_pma_portsamplesresult *p =
+ (struct ib_pma_portsamplesresult *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int i;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->sample_status = cpu_to_be16(dev->pma_sample_status);
+ for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
+ p->counter[i] = cpu_to_be32(
+ get_counter(dev, dev->pma_counter_select[i]));
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev)
+{
+ struct ib_pma_portsamplesresult_ext *p =
+ (struct ib_pma_portsamplesresult_ext *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int i;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->sample_status = cpu_to_be16(dev->pma_sample_status);
+ /* 64 bits */
+ p->extended_width = __constant_cpu_to_be32(0x80000000);
+ for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
+ p->counter[i] = cpu_to_be64(
+ get_counter(dev, dev->pma_counter_select[i]));
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portcounters(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ struct ipath_layer_counters cntrs;
+ u8 port_select = p->port_select;
+
+ ipath_layer_get_counters(dev->dd, &cntrs);
+
+ /* Adjust counters for any resets done. */
+ cntrs.symbol_error_counter -= dev->n_symbol_error_counter;
+ cntrs.link_error_recovery_counter -=
+ dev->n_link_error_recovery_counter;
+ cntrs.link_downed_counter -= dev->n_link_downed_counter;
+ cntrs.port_rcv_errors += dev->rcv_errors;
+ cntrs.port_rcv_errors -= dev->n_port_rcv_errors;
+ cntrs.port_rcv_remphys_errors -= dev->n_port_rcv_remphys_errors;
+ cntrs.port_xmit_discards -= dev->n_port_xmit_discards;
+ cntrs.port_xmit_data -= dev->n_port_xmit_data;
+ cntrs.port_rcv_data -= dev->n_port_rcv_data;
+ cntrs.port_xmit_packets -= dev->n_port_xmit_packets;
+ cntrs.port_rcv_packets -= dev->n_port_rcv_packets;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ if (cntrs.symbol_error_counter > 0xFFFFUL)
+ p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
+ else
+ p->symbol_error_counter =
+ cpu_to_be16((u16)cntrs.symbol_error_counter);
+ if (cntrs.link_error_recovery_counter > 0xFFUL)
+ p->link_error_recovery_counter = 0xFF;
+ else
+ p->link_error_recovery_counter =
+ (u8)cntrs.link_error_recovery_counter;
+ if (cntrs.link_downed_counter > 0xFFUL)
+ p->link_downed_counter = 0xFF;
+ else
+ p->link_downed_counter = (u8)cntrs.link_downed_counter;
+ if (cntrs.port_rcv_errors > 0xFFFFUL)
+ p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
+ else
+ p->port_rcv_errors =
+ cpu_to_be16((u16) cntrs.port_rcv_errors);
+ if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
+ p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
+ else
+ p->port_rcv_remphys_errors =
+ cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
+ if (cntrs.port_xmit_discards > 0xFFFFUL)
+ p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
+ else
+ p->port_xmit_discards =
+ cpu_to_be16((u16)cntrs.port_xmit_discards);
+ if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
+ p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
+ else
+ p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
+ if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
+ p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
+ else
+ p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
+ if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
+ p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
+ else
+ p->port_xmit_packets =
+ cpu_to_be32((u32)cntrs.port_xmit_packets);
+ if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
+ p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
+ else
+ p->port_rcv_packets =
+ cpu_to_be32((u32) cntrs.port_rcv_packets);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters_ext *p =
+ (struct ib_pma_portcounters_ext *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ u64 swords, rwords, spkts, rpkts, xwait;
+ u8 port_select = p->port_select;
+
+ ipath_layer_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
+ &rpkts, &xwait);
+
+ /* Adjust counters for any resets done. */
+ swords -= dev->n_port_xmit_data;
+ rwords -= dev->n_port_rcv_data;
+ spkts -= dev->n_port_xmit_packets;
+ rpkts -= dev->n_port_rcv_packets;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ p->port_xmit_data = cpu_to_be64(swords);
+ p->port_rcv_data = cpu_to_be64(rwords);
+ p->port_xmit_packets = cpu_to_be64(spkts);
+ p->port_rcv_packets = cpu_to_be64(rpkts);
+ p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
+ p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
+ p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
+ p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_set_portcounters(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ struct ipath_layer_counters cntrs;
+
+ /*
+ * Since the HW doesn't support clearing counters, we save the
+ * current count and subtract it from future responses.
+ */
+ ipath_layer_get_counters(dev->dd, &cntrs);
+
+ if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
+ dev->n_symbol_error_counter = cntrs.symbol_error_counter;
+
+ if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
+ dev->n_link_error_recovery_counter =
+ cntrs.link_error_recovery_counter;
+
+ if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
+ dev->n_link_downed_counter = cntrs.link_downed_counter;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
+ dev->n_port_rcv_errors =
+ cntrs.port_rcv_errors + dev->rcv_errors;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
+ dev->n_port_rcv_remphys_errors =
+ cntrs.port_rcv_remphys_errors;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
+ dev->n_port_xmit_discards = cntrs.port_xmit_discards;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
+ dev->n_port_xmit_data = cntrs.port_xmit_data;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
+ dev->n_port_rcv_data = cntrs.port_rcv_data;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
+ dev->n_port_xmit_packets = cntrs.port_xmit_packets;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
+ dev->n_port_rcv_packets = cntrs.port_rcv_packets;
+
+ return recv_pma_get_portcounters(pmp, ibdev, port);
+}
+
+static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ u64 swords, rwords, spkts, rpkts, xwait;
+
+ ipath_layer_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
+ &rpkts, &xwait);
+
+ if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
+ dev->n_port_xmit_data = swords;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
+ dev->n_port_rcv_data = rwords;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
+ dev->n_port_xmit_packets = spkts;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
+ dev->n_port_rcv_packets = rpkts;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
+ dev->n_unicast_xmit = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
+ dev->n_unicast_rcv = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
+ dev->n_multicast_xmit = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
+ dev->n_multicast_rcv = 0;
+
+ return recv_pma_get_portcounters_ext(pmp, ibdev, port);
+}
+
+static int process_subn(struct ib_device *ibdev, int mad_flags,
+ u8 port_num, struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ struct ib_smp *smp = (struct ib_smp *)out_mad;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int ret;
+
+ *out_mad = *in_mad;
+ if (smp->class_version != 1) {
+ smp->status |= IB_SMP_UNSUP_VERSION;
+ ret = reply(smp);
+ goto bail;
+ }
+
+ /* Is the mkey in the process of expiring? */
+ if (dev->mkey_lease_timeout && jiffies >= dev->mkey_lease_timeout) {
+ /* Clear timeout and mkey protection field. */
+ dev->mkey_lease_timeout = 0;
+ dev->mkeyprot_resv_lmc &= 0x3F;
+ }
+
+ /*
+ * M_Key checking depends on
+ * Portinfo:M_Key_protect_bits
+ */
+ if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
+ dev->mkey != smp->mkey &&
+ (smp->method == IB_MGMT_METHOD_SET ||
+ (smp->method == IB_MGMT_METHOD_GET &&
+ (dev->mkeyprot_resv_lmc >> 7) != 0))) {
+ if (dev->mkey_violations != 0xFFFF)
+ ++dev->mkey_violations;
+ if (dev->mkey_lease_timeout ||
+ dev->mkey_lease_period == 0) {
+ ret = IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ goto bail;
+ }
+ dev->mkey_lease_timeout = jiffies +
+ dev->mkey_lease_period * HZ;
+ /* Future: Generate a trap notice. */
+ ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ goto bail;
+ } else if (dev->mkey_lease_timeout)
+ dev->mkey_lease_timeout = 0;
+
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (smp->attr_id) {
+ case IB_SMP_ATTR_NODE_DESC:
+ ret = recv_subn_get_nodedescription(smp, ibdev);
+ goto bail;
+ case IB_SMP_ATTR_NODE_INFO:
+ ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
+ goto bail;
+ case IB_SMP_ATTR_GUID_INFO:
+ ret = recv_subn_get_guidinfo(smp, ibdev);
+ goto bail;
+ case IB_SMP_ATTR_PORT_INFO:
+ ret = recv_subn_get_portinfo(smp, ibdev, port_num);
+ goto bail;
+ case IB_SMP_ATTR_PKEY_TABLE:
+ ret = recv_subn_get_pkeytable(smp, ibdev);
+ goto bail;
+ case IB_SMP_ATTR_SM_INFO:
+ if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
+ ret = IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ goto bail;
+ }
+ if (dev->port_cap_flags & IB_PORT_SM) {
+ ret = IB_MAD_RESULT_SUCCESS;
+ goto bail;
+ }
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply(smp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_SET:
+ switch (smp->attr_id) {
+ case IB_SMP_ATTR_GUID_INFO:
+ ret = recv_subn_set_guidinfo(smp, ibdev);
+ goto bail;
+ case IB_SMP_ATTR_PORT_INFO:
+ ret = recv_subn_set_portinfo(smp, ibdev, port_num);
+ goto bail;
+ case IB_SMP_ATTR_PKEY_TABLE:
+ ret = recv_subn_set_pkeytable(smp, ibdev);
+ goto bail;
+ case IB_SMP_ATTR_SM_INFO:
+ if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
+ ret = IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ goto bail;
+ }
+ if (dev->port_cap_flags & IB_PORT_SM) {
+ ret = IB_MAD_RESULT_SUCCESS;
+ goto bail;
+ }
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply(smp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ ret = IB_MAD_RESULT_FAILURE;
+ goto bail;
+ default:
+ smp->status |= IB_SMP_UNSUP_METHOD;
+ ret = reply(smp);
+ }
+
+bail:
+ return ret;
+}
+
+static int process_perf(struct ib_device *ibdev, u8 port_num,
+ struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ struct ib_perf *pmp = (struct ib_perf *)out_mad;
+ int ret;
+
+ *out_mad = *in_mad;
+ if (pmp->class_version != 1) {
+ pmp->status |= IB_SMP_UNSUP_VERSION;
+ ret = reply((struct ib_smp *) pmp);
+ goto bail;
+ }
+
+ switch (pmp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (pmp->attr_id) {
+ case IB_PMA_CLASS_PORT_INFO:
+ ret = recv_pma_get_classportinfo(pmp);
+ goto bail;
+ case IB_PMA_PORT_SAMPLES_CONTROL:
+ ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
+ port_num);
+ goto bail;
+ case IB_PMA_PORT_SAMPLES_RESULT:
+ ret = recv_pma_get_portsamplesresult(pmp, ibdev);
+ goto bail;
+ case IB_PMA_PORT_SAMPLES_RESULT_EXT:
+ ret = recv_pma_get_portsamplesresult_ext(pmp,
+ ibdev);
+ goto bail;
+ case IB_PMA_PORT_COUNTERS:
+ ret = recv_pma_get_portcounters(pmp, ibdev,
+ port_num);
+ goto bail;
+ case IB_PMA_PORT_COUNTERS_EXT:
+ ret = recv_pma_get_portcounters_ext(pmp, ibdev,
+ port_num);
+ goto bail;
+ default:
+ pmp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_smp *) pmp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_SET:
+ switch (pmp->attr_id) {
+ case IB_PMA_PORT_SAMPLES_CONTROL:
+ ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
+ port_num);
+ goto bail;
+ case IB_PMA_PORT_COUNTERS:
+ ret = recv_pma_set_portcounters(pmp, ibdev,
+ port_num);
+ goto bail;
+ case IB_PMA_PORT_COUNTERS_EXT:
+ ret = recv_pma_set_portcounters_ext(pmp, ibdev,
+ port_num);
+ goto bail;
+ default:
+ pmp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_smp *) pmp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ ret = IB_MAD_RESULT_FAILURE;
+ goto bail;
+ default:
+ pmp->status |= IB_SMP_UNSUP_METHOD;
+ ret = reply((struct ib_smp *) pmp);
+ }
+
+bail:
+ return ret;
+}
+
+/**
+ * ipath_process_mad - process an incoming MAD packet
+ * @ibdev: the infiniband device this packet came in on
+ * @mad_flags: MAD flags
+ * @port_num: the port number this packet came in on
+ * @in_wc: the work completion entry for this packet
+ * @in_grh: the global route header for this packet
+ * @in_mad: the incoming MAD
+ * @out_mad: any outgoing MAD reply
+ *
+ * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
+ * interested in processing.
+ *
+ * Note that the verbs framework has already done the MAD sanity checks,
+ * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
+ * MADs.
+ *
+ * This is called by the ib_mad module.
+ */
+int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
+ struct ib_wc *in_wc, struct ib_grh *in_grh,
+ struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int ret;
+
+ /*
+ * Snapshot current HW counters to "clear" them.
+ * This should be done when the driver is loaded except that for
+ * some reason we get a zillion errors when brining up the link.
+ */
+ if (dev->rcv_errors == 0) {
+ struct ipath_layer_counters cntrs;
+
+ ipath_layer_get_counters(to_idev(ibdev)->dd, &cntrs);
+ dev->rcv_errors++;
+ dev->n_symbol_error_counter = cntrs.symbol_error_counter;
+ dev->n_link_error_recovery_counter =
+ cntrs.link_error_recovery_counter;
+ dev->n_link_downed_counter = cntrs.link_downed_counter;
+ dev->n_port_rcv_errors = cntrs.port_rcv_errors + 1;
+ dev->n_port_rcv_remphys_errors =
+ cntrs.port_rcv_remphys_errors;
+ dev->n_port_xmit_discards = cntrs.port_xmit_discards;
+ dev->n_port_xmit_data = cntrs.port_xmit_data;
+ dev->n_port_rcv_data = cntrs.port_rcv_data;
+ dev->n_port_xmit_packets = cntrs.port_xmit_packets;
+ dev->n_port_rcv_packets = cntrs.port_rcv_packets;
+ }
+ switch (in_mad->mad_hdr.mgmt_class) {
+ case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
+ case IB_MGMT_CLASS_SUBN_LID_ROUTED:
+ ret = process_subn(ibdev, mad_flags, port_num,
+ in_mad, out_mad);
+ goto bail;
+ case IB_MGMT_CLASS_PERF_MGMT:
+ ret = process_perf(ibdev, port_num, in_mad, out_mad);
+ goto bail;
+ default:
+ ret = IB_MAD_RESULT_SUCCESS;
+ }
+
+bail:
+ return ret;
+}
diff -r cdde68b1f32c -r 8c8c2341604a drivers/infiniband/hw/ipath/ipath_qp.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c Wed Mar 29 15:21:27 2006 -0800
@@ -0,0 +1,913 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE)
+#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
+#define mk_qpn(qpt, map, off) (((map) - (qpt)->map) * BITS_PER_PAGE + \
+ (off))
+#define find_next_offset(map, off) find_next_zero_bit((map)->page, \
+ BITS_PER_PAGE, off)
+
+#define TRANS_INVALID 0
+#define TRANS_ANY2RST 1
+#define TRANS_RST2INIT 2
+#define TRANS_INIT2INIT 3
+#define TRANS_INIT2RTR 4
+#define TRANS_RTR2RTS 5
+#define TRANS_RTS2RTS 6
+#define TRANS_SQERR2RTS 7
+#define TRANS_ANY2ERR 8
+#define TRANS_RTS2SQD 9 /* XXX Wait for expected ACKs & signal event */
+#define TRANS_SQD2SQD 10 /* error if not drained & parameter change */
+#define TRANS_SQD2RTS 11 /* error if not drained */
+
+/*
+ * Convert the AETH credit code into the number of credits.
+ */
+static u32 credit_table[31] = {
+ 0, /* 0 */
+ 1, /* 1 */
+ 2, /* 2 */
+ 3, /* 3 */
+ 4, /* 4 */
+ 6, /* 5 */
+ 8, /* 6 */
+ 12, /* 7 */
+ 16, /* 8 */
+ 24, /* 9 */
+ 32, /* A */
+ 48, /* B */
+ 64, /* C */
+ 96, /* D */
+ 128, /* E */
+ 192, /* F */
+ 256, /* 10 */
+ 384, /* 11 */
+ 512, /* 12 */
+ 768, /* 13 */
+ 1024, /* 14 */
+ 1536, /* 15 */
+ 2048, /* 16 */
+ 3072, /* 17 */
+ 4096, /* 18 */
+ 6144, /* 19 */
+ 8192, /* 1A */
+ 12288, /* 1B */
+ 16384, /* 1C */
+ 24576, /* 1D */
+ 32768 /* 1E */
+};
+
+static u32 alloc_qpn(struct ipath_qp_table *qpt)
+{
+ u32 i, offset, max_scan, qpn;
+ struct qpn_map *map;
+ u32 ret;
+
+ qpn = qpt->last + 1;
+ if (qpn >= QPN_MAX)
+ qpn = 2;
+ offset = qpn & BITS_PER_PAGE_MASK;
+ map = &qpt->map[qpn / BITS_PER_PAGE];
+ max_scan = qpt->nmaps - !offset;
+ for (i = 0;;) {
+ if (unlikely(!map->page)) {
+ unsigned long page = get_zeroed_page(GFP_KERNEL);
+ unsigned long flags;
+
+ /*
+ * Free the page if someone raced with us
+ * installing it:
+ */
+ spin_lock_irqsave(&qpt->lock, flags);
+ if (map->page)
+ free_page(page);
+ else
+ map->page = (void *)page;
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ if (unlikely(!map->page))
+ break;
+ }
+ if (likely(atomic_read(&map->n_free))) {
+ do {
+ if (!test_and_set_bit(offset, map->page)) {
+ atomic_dec(&map->n_free);
+ qpt->last = qpn;
+ ret = qpn;
+ goto bail;
+ }
+ offset = find_next_offset(map, offset);
+ qpn = mk_qpn(qpt, map, offset);
+ /*
+ * This test differs from alloc_pidmap().
+ * If find_next_offset() does find a zero
+ * bit, we don't need to check for QPN
+ * wrapping around past our starting QPN.
+ * We just need to be sure we don't loop
+ * forever.
+ */
+ } while (offset < BITS_PER_PAGE && qpn < QPN_MAX);
+ }
+ /*
+ * In order to keep the number of pages allocated to a
+ * minimum, we scan the all existing pages before increasing
+ * the size of the bitmap table.
+ */
+ if (++i > max_scan) {
+ if (qpt->nmaps == QPNMAP_ENTRIES)
+ break;
+ map = &qpt->map[qpt->nmaps++];
+ offset = 0;
+ } else if (map < &qpt->map[qpt->nmaps]) {
+ ++map;
+ offset = 0;
+ } else {
+ map = &qpt->map[0];
+ offset = 2;
+ }
+ qpn = mk_qpn(qpt, map, offset);
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+static void free_qpn(struct ipath_qp_table *qpt, u32 qpn)
+{
+ struct qpn_map *map;
+
+ map = qpt->map + qpn / BITS_PER_PAGE;
+ if (map->page)
+ clear_bit(qpn & BITS_PER_PAGE_MASK, map->page);
+ atomic_inc(&map->n_free);
+}
+
+/**
+ * ipath_alloc_qpn - allocate a QP number
+ * @qpt: the QP table
+ * @qp: the QP
+ * @type: the QP type (IB_QPT_SMI and IB_QPT_GSI are special)
+ *
+ * Allocate the next available QPN and put the QP into the hash table.
+ * The hash table holds a reference to the QP.
+ */
+int ipath_alloc_qpn(struct ipath_qp_table *qpt, struct ipath_qp *qp,
+ enum ib_qp_type type)
+{
+ unsigned long flags;
+ u32 qpn;
+ int ret;
+
+ if (type == IB_QPT_SMI)
+ qpn = 0;
+ else if (type == IB_QPT_GSI)
+ qpn = 1;
+ else {
+ /* Allocate the next available QPN */
+ qpn = alloc_qpn(qpt);
+ if (qpn == 0) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ }
+ qp->ibqp.qp_num = qpn;
+
+ /* Add the QP to the hash table. */
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ qpn %= qpt->max;
+ qp->next = qpt->table[qpn];
+ qpt->table[qpn] = qp;
+ atomic_inc(&qp->refcount);
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * ipath_free_qp - remove a QP from the QP table
+ * @qpt: the QP table
+ * @qp: the QP to remove
+ *
+ * Remove the QP from the table so it can't be found asynchronously by
+ * the receive interrupt routine.
+ */
+void ipath_free_qp(struct ipath_qp_table *qpt, struct ipath_qp *qp)
+{
+ struct ipath_qp *q, **qpp;
+ unsigned long flags;
+ int fnd = 0;
+
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ /* Remove QP from the hash table. */
+ qpp = &qpt->table[qp->ibqp.qp_num % qpt->max];
+ for (; (q = *qpp) != NULL; qpp = &q->next) {
+ if (q == qp) {
+ *qpp = qp->next;
+ qp->next = NULL;
+ atomic_dec(&qp->refcount);
+ fnd = 1;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+
+ if (!fnd)
+ return;
+
+ /* If QPN is not reserved, mark QPN free in the bitmap. */
+ if (qp->ibqp.qp_num > 1)
+ free_qpn(qpt, qp->ibqp.qp_num);
+
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+}
+
+/**
+ * ipath_free_all_qps - remove all QPs from the table
+ * @qpt: the QP table to empty
+ */
+void ipath_free_all_qps(struct ipath_qp_table *qpt)
+{
+ unsigned long flags;
+ struct ipath_qp *qp, *nqp;
+ u32 n;
+
+ for (n = 0; n < qpt->max; n++) {
+ spin_lock_irqsave(&qpt->lock, flags);
+ qp = qpt->table[n];
+ qpt->table[n] = NULL;
+ spin_unlock_irqrestore(&qpt->lock, flags);
+
+ while (qp) {
+ nqp = qp->next;
+ if (qp->ibqp.qp_num > 1)
+ free_qpn(qpt, qp->ibqp.qp_num);
+ if (!atomic_dec_and_test(&qp->refcount) ||
+ !ipath_destroy_qp(&qp->ibqp))
+ _VERBS_INFO("QP memory leak!\n");
+ qp = nqp;
+ }
+ }
+
+ for (n = 0; n < ARRAY_SIZE(qpt->map); n++) {
+ if (qpt->map[n].page)
+ free_page((unsigned long)qpt->map[n].page);
+ }
+}
+
+/**
+ * ipath_lookup_qpn - return the QP with the given QPN
+ * @qpt: the QP table
+ * @qpn: the QP number to look up
+ *
+ * The caller is responsible for decrementing the QP reference count
+ * when done.
+ */
+struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn)
+{
+ unsigned long flags;
+ struct ipath_qp *qp;
+
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ for (qp = qpt->table[qpn % qpt->max]; qp; qp = qp->next) {
+ if (qp->ibqp.qp_num == qpn) {
+ atomic_inc(&qp->refcount);
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ return qp;
+}
+
+/**
+ * ipath_reset_qp - initialize the QP state to the reset state
+ * @qp: the QP to reset
+ */
+static void ipath_reset_qp(struct ipath_qp *qp)
+{
+ qp->remote_qpn = 0;
+ qp->qkey = 0;
+ qp->qp_access_flags = 0;
+ qp->s_hdrwords = 0;
+ qp->s_psn = 0;
+ qp->r_psn = 0;
+ atomic_set(&qp->msn, 0);
+ if (qp->ibqp.qp_type == IB_QPT_RC) {
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->r_state = IB_OPCODE_RC_SEND_LAST;
+ } else {
+ qp->s_state = IB_OPCODE_UC_SEND_LAST;
+ qp->r_state = IB_OPCODE_UC_SEND_LAST;
+ }
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ qp->s_nak_state = 0;
+ qp->s_rnr_timeout = 0;
+ qp->s_head = 0;
+ qp->s_tail = 0;
+ qp->s_cur = 0;
+ qp->s_last = 0;
+ qp->s_ssn = 1;
+ qp->s_lsn = 0;
+ qp->r_rq.head = 0;
+ qp->r_rq.tail = 0;
+ qp->r_reuse_sge = 0;
+}
+
+/**
+ * ipath_modify_qp - modify the attributes of a queue pair
+ * @ibqp: the queue pair who's attributes we're modifying
+ * @attr: the new attributes
+ * @attr_mask: the mask of attributes to modify
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ enum ib_qp_state cur_state, new_state;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ spin_lock(&qp->s_lock);
+
+ cur_state = attr_mask & IB_QP_CUR_STATE ?
+ attr->cur_qp_state : qp->state;
+ new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+
+ if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
+ attr_mask))
+ goto inval;
+
+ switch (new_state) {
+ case IB_QPS_RESET:
+ ipath_reset_qp(qp);
+ break;
+
+ case IB_QPS_ERR:
+ ipath_error_qp(qp);
+ break;
+
+ default:
+ break;
+
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX) {
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+
+ if (attr->pkey_index >= ipath_layer_get_npkeys(dev->dd))
+ goto inval;
+ qp->s_pkey_index = attr->pkey_index;
+ }
+
+ if (attr_mask & IB_QP_DEST_QPN)
+ qp->remote_qpn = attr->dest_qp_num;
+
+ if (attr_mask & IB_QP_SQ_PSN) {
+ qp->s_next_psn = attr->sq_psn;
+ qp->s_last_psn = qp->s_next_psn - 1;
+ }
+
+ if (attr_mask & IB_QP_RQ_PSN)
+ qp->r_psn = attr->rq_psn;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ qp->qp_access_flags = attr->qp_access_flags;
+
+ if (attr_mask & IB_QP_AV) {
+ if (attr->ah_attr.dlid == 0 ||
+ attr->ah_attr.dlid >= IPS_MULTICAST_LID_BASE)
+ goto inval;
+ qp->remote_ah_attr = attr->ah_attr;
+ }
+
+ if (attr_mask & IB_QP_PATH_MTU)
+ qp->path_mtu = attr->path_mtu;
+
+ if (attr_mask & IB_QP_RETRY_CNT)
+ qp->s_retry = qp->s_retry_cnt = attr->retry_cnt;
+
+ if (attr_mask & IB_QP_RNR_RETRY) {
+ qp->s_rnr_retry = attr->rnr_retry;
+ if (qp->s_rnr_retry > 7)
+ qp->s_rnr_retry = 7;
+ qp->s_rnr_retry_cnt = qp->s_rnr_retry;
+ }
+
+ if (attr_mask & IB_QP_MIN_RNR_TIMER) {
+ if (attr->min_rnr_timer > 31)
+ goto inval;
+ qp->s_min_rnr_timer = attr->min_rnr_timer;
+ }
+
+ if (attr_mask & IB_QP_QKEY)
+ qp->qkey = attr->qkey;
+
+ if (attr_mask & IB_QP_PKEY_INDEX)
+ qp->s_pkey_index = attr->pkey_index;
+
+ qp->state = new_state;
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+
+ /*
+ * If QP1 changed to the RTS state, try to move to the link to INIT
+ * even if it was ACTIVE so the SM will reinitialize the SMA's
+ * state.
+ */
+ if (qp->ibqp.qp_num == 1 && new_state == IB_QPS_RTS) {
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
+ }
+ ret = 0;
+ goto bail;
+
+inval:
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ ret = -EINVAL;
+
+bail:
+ return ret;
+}
+
+int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_qp_init_attr *init_attr)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+
+ attr->qp_state = qp->state;
+ attr->cur_qp_state = attr->qp_state;
+ attr->path_mtu = qp->path_mtu;
+ attr->path_mig_state = 0;
+ attr->qkey = qp->qkey;
+ attr->rq_psn = qp->r_psn;
+ attr->sq_psn = qp->s_next_psn;
+ attr->dest_qp_num = qp->remote_qpn;
+ attr->qp_access_flags = qp->qp_access_flags;
+ attr->cap.max_send_wr = qp->s_size - 1;
+ attr->cap.max_recv_wr = qp->r_rq.size - 1;
+ attr->cap.max_send_sge = qp->s_max_sge;
+ attr->cap.max_recv_sge = qp->r_rq.max_sge;
+ attr->cap.max_inline_data = 0;
+ attr->ah_attr = qp->remote_ah_attr;
+ memset(&attr->alt_ah_attr, 0, sizeof(attr->alt_ah_attr));
+ attr->pkey_index = qp->s_pkey_index;
+ attr->alt_pkey_index = 0;
+ attr->en_sqd_async_notify = 0;
+ attr->sq_draining = 0;
+ attr->max_rd_atomic = 1;
+ attr->max_dest_rd_atomic = 1;
+ attr->min_rnr_timer = qp->s_min_rnr_timer;
+ attr->port_num = 1;
+ attr->timeout = 0;
+ attr->retry_cnt = qp->s_retry_cnt;
+ attr->rnr_retry = qp->s_rnr_retry;
+ attr->alt_port_num = 0;
+ attr->alt_timeout = 0;
+
+ init_attr->event_handler = qp->ibqp.event_handler;
+ init_attr->qp_context = qp->ibqp.qp_context;
+ init_attr->send_cq = qp->ibqp.send_cq;
+ init_attr->recv_cq = qp->ibqp.recv_cq;
+ init_attr->srq = qp->ibqp.srq;
+ init_attr->cap = attr->cap;
+ init_attr->sq_sig_type =
+ (qp->s_flags & (1 << IPATH_S_SIGNAL_REQ_WR))
+ ? IB_SIGNAL_REQ_WR : 0;
+ init_attr->qp_type = qp->ibqp.qp_type;
+ init_attr->port_num = 1;
+ return 0;
+}
+
+/**
+ * ipath_compute_aeth - compute the AETH (syndrome + MSN)
+ * @qp: the queue pair to compute the AETH for
+ *
+ * Returns the AETH.
+ *
+ * The QP s_lock should be held.
+ */
+__be32 ipath_compute_aeth(struct ipath_qp *qp)
+{
+ u32 aeth = atomic_read(&qp->msn) & IPS_MSN_MASK;
+
+ if (qp->s_nak_state) {
+ aeth |= qp->s_nak_state << IPS_AETH_CREDIT_SHIFT;
+ } else if (qp->ibqp.srq) {
+ /*
+ * Shared receive queues don't generate credits.
+ * Set the credit field to the invalid value.
+ */
+ aeth |= IPS_AETH_CREDIT_INVAL << IPS_AETH_CREDIT_SHIFT;
+ } else {
+ u32 min, max, x;
+ u32 credits;
+
+ /*
+ * Compute the number of credits available (RWQEs).
+ * XXX Not holding the r_rq.lock here so there is a small
+ * chance that the pair of reads are not atomic.
+ */
+ credits = qp->r_rq.head - qp->r_rq.tail;
+ if ((int)credits < 0)
+ credits += qp->r_rq.size;
+ /*
+ * Binary search the credit table to find the code to
+ * use.
+ */
+ min = 0;
+ max = 31;
+ for (;;) {
+ x = (min + max) / 2;
+ if (credit_table[x] == credits)
+ break;
+ if (credit_table[x] > credits)
+ max = x;
+ else if (min == x)
+ break;
+ else
+ min = x;
+ }
+ aeth |= x << IPS_AETH_CREDIT_SHIFT;
+ }
+ return cpu_to_be32(aeth);
+}
+
+/**
+ * ipath_create_qp - create a queue pair for a device
+ * @ibpd: the protection domain who's device we create the queue pair for
+ * @init_attr: the attributes of the queue pair
+ * @udata: unused by InfiniPath
+ *
+ * Returns the queue pair on success, otherwise returns an errno.
+ *
+ * Called by the ib_create_qp() core verbs function.
+ */
+struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct ipath_qp *qp;
+ int err;
+ struct ipath_swqe *swq = NULL;
+ struct ipath_ibdev *dev;
+ size_t sz;
+ struct ib_qp *ret;
+
+ if (init_attr->cap.max_send_sge > 255 ||
+ init_attr->cap.max_recv_sge > 255) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ switch (init_attr->qp_type) {
+ case IB_QPT_UC:
+ case IB_QPT_RC:
+ sz = sizeof(struct ipath_sge) *
+ init_attr->cap.max_send_sge +
+ sizeof(struct ipath_swqe);
+ swq = vmalloc((init_attr->cap.max_send_wr + 1) * sz);
+ if (swq == NULL) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+ /* FALLTHROUGH */
+ case IB_QPT_UD:
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ qp = kmalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+ qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
+ sz = sizeof(struct ipath_sge) *
+ init_attr->cap.max_recv_sge +
+ sizeof(struct ipath_rwqe);
+ qp->r_rq.wq = vmalloc(qp->r_rq.size * sz);
+ if (!qp->r_rq.wq) {
+ kfree(qp);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ /*
+ * ib_create_qp() will initialize qp->ibqp
+ * except for qp->ibqp.qp_num.
+ */
+ spin_lock_init(&qp->s_lock);
+ spin_lock_init(&qp->r_rq.lock);
+ atomic_set(&qp->refcount, 0);
+ init_waitqueue_head(&qp->wait);
+ tasklet_init(&qp->s_task,
+ init_attr->qp_type == IB_QPT_RC ?
+ ipath_do_rc_send : ipath_do_uc_send,
+ (unsigned long)qp);
+ qp->piowait.next = LIST_POISON1;
+ qp->piowait.prev = LIST_POISON2;
+ qp->timerwait.next = LIST_POISON1;
+ qp->timerwait.prev = LIST_POISON2;
+ qp->state = IB_QPS_RESET;
+ qp->s_wq = swq;
+ qp->s_size = init_attr->cap.max_send_wr + 1;
+ qp->s_max_sge = init_attr->cap.max_send_sge;
+ qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
+ qp->s_flags = init_attr->sq_sig_type == IB_SIGNAL_REQ_WR ?
+ 1 << IPATH_S_SIGNAL_REQ_WR : 0;
+ dev = to_idev(ibpd->device);
+ err = ipath_alloc_qpn(&dev->qp_table, qp,
+ init_attr->qp_type);
+ if (err) {
+ vfree(swq);
+ vfree(qp->r_rq.wq);
+ kfree(qp);
+ ret = ERR_PTR(err);
+ goto bail;
+ }
+ ipath_reset_qp(qp);
+
+ /* Tell the core driver that the kernel SMA is present. */
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ ipath_layer_set_verbs_flags(dev->dd,
+ IPATH_VERBS_KERNEL_SMA);
+ break;
+
+ default:
+ /* Don't support raw QPs */
+ ret = ERR_PTR(-ENOSYS);
+ goto bail;
+ }
+
+ init_attr->cap.max_inline_data = 0;
+
+ ret = &qp->ibqp;
+
+bail:
+ return ret;
+}
+
+/**
+ * ipath_destroy_qp - destroy a queue pair
+ * @ibqp: the queue pair to destroy
+ *
+ * Returns 0 on success.
+ *
+ * Note that this can be called while the QP is actively sending or
+ * receiving!
+ */
+int ipath_destroy_qp(struct ib_qp *ibqp)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+ unsigned long flags;
+
+ /* Tell the core driver that the kernel SMA is gone. */
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ ipath_layer_set_verbs_flags(dev->dd, 0);
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ spin_lock(&qp->s_lock);
+ qp->state = IB_QPS_ERR;
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+
+ /* Stop the sending tasklet. */
+ tasklet_kill(&qp->s_task);
+
+ /* Make sure the QP isn't on the timeout list. */
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ /*
+ * Make sure that the QP is not in the QPN table so receive
+ * interrupts will discard packets for this QP. XXX Also remove QP
+ * from multicast table.
+ */
+ if (atomic_read(&qp->refcount) != 0)
+ ipath_free_qp(&dev->qp_table, qp);
+
+ vfree(qp->s_wq);
+ vfree(qp->r_rq.wq);
+ kfree(qp);
+ return 0;
+}
+
+/**
+ * ipath_init_qp_table - initialize the QP table for a device
+ * @idev: the device who's QP table we're initializing
+ * @size: the size of the QP table
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int ipath_init_qp_table(struct ipath_ibdev *idev, int size)
+{
+ int i;
+ int ret;
+
+ idev->qp_table.last = 1; /* QPN 0 and 1 are special. */
+ idev->qp_table.max = size;
+ idev->qp_table.nmaps = 1;
+ idev->qp_table.table = kzalloc(size * sizeof(*idev->qp_table.table),
+ GFP_KERNEL);
+ if (idev->qp_table.table == NULL) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(idev->qp_table.map); i++) {
+ atomic_set(&idev->qp_table.map[i].n_free, BITS_PER_PAGE);
+ idev->qp_table.map[i].page = NULL;
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * ipath_sqerror_qp - put a QP's send queue into an error state
+ * @qp: QP who's send queue will be put into an error state
+ * @wc: the WC responsible for putting the QP in this state
+ *
+ * Flushes the send work queue.
+ * The QP s_lock should be held.
+ */
+
+void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+
+ _VERBS_INFO("Send queue error on QP%d/%d: err: %d\n",
+ qp->ibqp.qp_num, qp->remote_qpn, wc->status);
+
+ spin_lock(&dev->pending_lock);
+ /* XXX What if its already removed by the timeout code? */
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+
+ wc->status = IB_WC_WR_FLUSH_ERR;
+
+ while (qp->s_last != qp->s_head) {
+ wc->wr_id = wqe->wr.wr_id;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ }
+ qp->s_cur = qp->s_tail = qp->s_head;
+ qp->state = IB_QPS_SQE;
+}
+
+/**
+ * ipath_error_qp - put a QP into an error state
+ * @qp: the QP to put into an error state
+ *
+ * Flushes both send and receive work queues.
+ * QP r_rq.lock and s_lock should be held.
+ */
+
+void ipath_error_qp(struct ipath_qp *qp)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ib_wc wc;
+
+ _VERBS_INFO("QP%d/%d in error state\n",
+ qp->ibqp.qp_num, qp->remote_qpn);
+
+ spin_lock(&dev->pending_lock);
+ /* XXX What if its already removed by the timeout code? */
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+
+ wc.status = IB_WC_WR_FLUSH_ERR;
+ wc.vendor_err = 0;
+ wc.byte_len = 0;
+ wc.imm_data = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = 0;
+ wc.wc_flags = 0;
+ wc.pkey_index = 0;
+ wc.slid = 0;
+ wc.sl = 0;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+
+ while (qp->s_last != qp->s_head) {
+ struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+
+ wc.wr_id = wqe->wr.wr_id;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 1);
+ }
+ qp->s_cur = qp->s_tail = qp->s_head;
+ qp->s_hdrwords = 0;
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+
+ wc.opcode = IB_WC_RECV;
+ while (qp->r_rq.tail != qp->r_rq.head) {
+ wc.wr_id = get_rwqe_ptr(&qp->r_rq, qp->r_rq.tail)->wr_id;
+ if (++qp->r_rq.tail >= qp->r_rq.size)
+ qp->r_rq.tail = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+ }
+}
+
+/**
+ * ipath_get_credit - flush the send work queue of a QP
+ * @qp: the qp who's send work queue to flush
+ * @aeth: the Acknowledge Extended Transport Header
+ *
+ * The QP s_lock should be held.
+ */
+void ipath_get_credit(struct ipath_qp *qp, u32 aeth)
+{
+ u32 credit = (aeth >> IPS_AETH_CREDIT_SHIFT) & IPS_AETH_CREDIT_MASK;
+
+ /*
+ * If the credit is invalid, we can send
+ * as many packets as we like. Otherwise, we have to
+ * honor the credit field.
+ */
+ if (credit == IPS_AETH_CREDIT_INVAL) {
+ qp->s_lsn = (u32) -1;
+ } else if (qp->s_lsn != (u32) -1) {
+ /* Compute new LSN (i.e., MSN + credit) */
+ credit = (aeth + credit_table[credit]) & IPS_MSN_MASK;
+ if (ipath_cmp24(credit, qp->s_lsn) > 0)
+ qp->s_lsn = credit;
+ }
+
+ /* Restart sending if it was blocked due to lack of credits. */
+ if (qp->s_cur != qp->s_head &&
+ (qp->s_lsn == (u32) -1 ||
+ ipath_cmp24(get_swqe_ptr(qp, qp->s_cur)->ssn,
+ qp->s_lsn + 1) <= 0))
+ tasklet_hi_schedule(&qp->s_task);
+}
diff -r cdde68b1f32c -r 8c8c2341604a drivers/infiniband/hw/ipath/ipath_ruc.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_ruc.c Wed Mar 29 15:21:27 2006 -0800
@@ -0,0 +1,552 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_verbs.h"
+
+/*
+ * Convert the AETH RNR timeout code into the number of milliseconds.
+ */
+const u32 ib_ipath_rnr_table[32] = {
+ 656, /* 0 */
+ 1, /* 1 */
+ 1, /* 2 */
+ 1, /* 3 */
+ 1, /* 4 */
+ 1, /* 5 */
+ 1, /* 6 */
+ 1, /* 7 */
+ 1, /* 8 */
+ 1, /* 9 */
+ 1, /* A */
+ 1, /* B */
+ 1, /* C */
+ 1, /* D */
+ 2, /* E */
+ 2, /* F */
+ 3, /* 10 */
+ 4, /* 11 */
+ 6, /* 12 */
+ 8, /* 13 */
+ 11, /* 14 */
+ 16, /* 15 */
+ 21, /* 16 */
+ 31, /* 17 */
+ 41, /* 18 */
+ 62, /* 19 */
+ 82, /* 1A */
+ 123, /* 1B */
+ 164, /* 1C */
+ 246, /* 1D */
+ 328, /* 1E */
+ 492 /* 1F */
+};
+
+/**
+ * ipath_insert_rnr_queue - put QP on the RNR timeout list for the device
+ * @qp: the QP
+ *
+ * XXX Use a simple list for now. We might need a priority
+ * queue if we have lots of QPs waiting for RNR timeouts
+ * but that should be rare.
+ */
+void ipath_insert_rnr_queue(struct ipath_qp *qp)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (list_empty(&dev->rnrwait))
+ list_add(&qp->timerwait, &dev->rnrwait);
+ else {
+ struct list_head *l = &dev->rnrwait;
+ struct ipath_qp *nqp = list_entry(l->next, struct ipath_qp,
+ timerwait);
+
+ while (qp->s_rnr_timeout >= nqp->s_rnr_timeout) {
+ qp->s_rnr_timeout -= nqp->s_rnr_timeout;
+ l = l->next;
+ if (l->next == &dev->rnrwait)
+ break;
+ nqp = list_entry(l->next, struct ipath_qp,
+ timerwait);
+ }
+ list_add(&qp->timerwait, l);
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+}
+
+/**
+ * ipath_get_rwqe - copy the next RWQE into the QP's RWQE
+ * @qp: the QP
+ * @wr_id_only: update wr_id only, not SGEs
+ *
+ * Return 0 if no RWQE is available, otherwise return 1.
+ *
+ * Called at interrupt level with the QP r_rq.lock held.
+ */
+int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only)
+{
+ struct ipath_rq *rq;
+ struct ipath_srq *srq;
+ struct ipath_rwqe *wqe;
+ int ret;
+
+ if (!qp->ibqp.srq) {
+ rq = &qp->r_rq;
+ if (unlikely(rq->tail == rq->head)) {
+ ret = 0;
+ goto bail;
+ }
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ qp->r_wr_id = wqe->wr_id;
+ if (!wr_id_only) {
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->num_sge;
+ qp->r_len = wqe->length;
+ }
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ ret = 1;
+ goto bail;
+ }
+
+ srq = to_isrq(qp->ibqp.srq);
+ rq = &srq->rq;
+ spin_lock(&rq->lock);
+ if (unlikely(rq->tail == rq->head)) {
+ spin_unlock(&rq->lock);
+ ret = 0;
+ goto bail;
+ }
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ qp->r_wr_id = wqe->wr_id;
+ if (!wr_id_only) {
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->num_sge;
+ qp->r_len = wqe->length;
+ }
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ if (srq->ibsrq.event_handler) {
+ struct ib_event ev;
+ u32 n;
+
+ if (rq->head < rq->tail)
+ n = rq->size + rq->head - rq->tail;
+ else
+ n = rq->head - rq->tail;
+ if (n < srq->limit) {
+ srq->limit = 0;
+ spin_unlock(&rq->lock);
+ ev.device = qp->ibqp.device;
+ ev.element.srq = qp->ibqp.srq;
+ ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ srq->ibsrq.event_handler(&ev,
+ srq->ibsrq.srq_context);
+ } else
+ spin_unlock(&rq->lock);
+ } else
+ spin_unlock(&rq->lock);
+ ret = 1;
+
+bail:
+ return ret;
+}
+
+/**
+ * ipath_ruc_loopback - handle UC and RC lookback requests
+ * @sqp: the loopback QP
+ * @wc: the work completion entry
+ *
+ * This is called from ipath_do_uc_send() or ipath_do_rc_send() to
+ * forward a WQE addressed to the same HCA.
+ * Note that although we are single threaded due to the tasklet, we still
+ * have to protect against post_send(). We don't have to worry about
+ * receive interrupts since this is a connected protocol and all packets
+ * will pass through here.
+ */
+void ipath_ruc_loopback(struct ipath_qp *sqp, struct ib_wc *wc)
+{
+ struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
+ struct ipath_qp *qp;
+ struct ipath_swqe *wqe;
+ struct ipath_sge *sge;
+ unsigned long flags;
+ u64 sdata;
+
+ qp = ipath_lookup_qpn(&dev->qp_table, sqp->remote_qpn);
+ if (!qp) {
+ dev->n_pkt_drops++;
+ return;
+ }
+
+again:
+ spin_lock_irqsave(&sqp->s_lock, flags);
+
+ if (!(ib_ipath_state_ops[sqp->state] & IPATH_PROCESS_SEND_OK)) {
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto done;
+ }
+
+ /* Get the next send request. */
+ if (sqp->s_last == sqp->s_head) {
+ /* Send work queue is empty. */
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto done;
+ }
+
+ /*
+ * We can rely on the entry not changing without the s_lock
+ * being held until we update s_last.
+ */
+ wqe = get_swqe_ptr(sqp, sqp->s_last);
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+
+ wc->wc_flags = 0;
+ wc->imm_data = 0;
+
+ sqp->s_sge.sge = wqe->sg_list[0];
+ sqp->s_sge.sg_list = wqe->sg_list + 1;
+ sqp->s_sge.num_sge = wqe->wr.num_sge;
+ sqp->s_len = wqe->length;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND_WITH_IMM:
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = wqe->wr.imm_data;
+ /* FALLTHROUGH */
+ case IB_WR_SEND:
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ if (!ipath_get_rwqe(qp, 0)) {
+ rnr_nak:
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ /* Handle RNR NAK */
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ goto send_comp;
+ if (sqp->s_rnr_retry == 0) {
+ wc->status = IB_WC_RNR_RETRY_EXC_ERR;
+ goto err;
+ }
+ if (sqp->s_rnr_retry_cnt < 7)
+ sqp->s_rnr_retry--;
+ dev->n_rnr_naks++;
+ sqp->s_rnr_timeout =
+ ib_ipath_rnr_table[sqp->s_min_rnr_timer];
+ ipath_insert_rnr_queue(sqp);
+ goto done;
+ }
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ break;
+
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = wqe->wr.imm_data;
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ if (!ipath_get_rwqe(qp, 1))
+ goto rnr_nak;
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ /* FALLTHROUGH */
+ case IB_WR_RDMA_WRITE:
+ if (wqe->length == 0)
+ break;
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_WRITE))) {
+ acc_err:
+ wc->status = IB_WC_REM_ACCESS_ERR;
+ err:
+ wc->wr_id = wqe->wr.wr_id;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc->vendor_err = 0;
+ wc->byte_len = 0;
+ wc->qp_num = sqp->ibqp.qp_num;
+ wc->src_qp = sqp->remote_qpn;
+ wc->pkey_index = 0;
+ wc->slid = sqp->remote_ah_attr.dlid;
+ wc->sl = sqp->remote_ah_attr.sl;
+ wc->dlid_path_bits = 0;
+ wc->port_num = 0;
+ ipath_sqerror_qp(sqp, wc);
+ goto done;
+ }
+ break;
+
+ case IB_WR_RDMA_READ:
+ if (unlikely(!ipath_rkey_ok(dev, &sqp->s_sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_READ)))
+ goto acc_err;
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_READ)))
+ goto acc_err;
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->wr.num_sge;
+ break;
+
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge, sizeof(u64),
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto acc_err;
+ /* Perform atomic OP and save result. */
+ sdata = wqe->wr.wr.atomic.swap;
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ qp->r_atomic_data = *(u64 *) qp->r_sge.sge.vaddr;
+ if (wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD)
+ *(u64 *) qp->r_sge.sge.vaddr =
+ qp->r_atomic_data + sdata;
+ else if (qp->r_atomic_data == wqe->wr.wr.atomic.compare_add)
+ *(u64 *) qp->r_sge.sge.vaddr = sdata;
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ *(u64 *) sqp->s_sge.sge.vaddr = qp->r_atomic_data;
+ goto send_comp;
+
+ default:
+ goto done;
+ }
+
+ sge = &sqp->s_sge.sge;
+ while (sqp->s_len) {
+ u32 len = sqp->s_len;
+
+ if (len > sge->length)
+ len = sge->length;
+ BUG_ON(len == 0);
+ ipath_copy_sge(&qp->r_sge, sge->vaddr, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--sqp->s_sge.num_sge)
+ *sge = *sqp->s_sge.sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ sqp->s_len -= len;
+ }
+
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE ||
+ wqe->wr.opcode == IB_WR_RDMA_READ)
+ goto send_comp;
+
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ else
+ wc->opcode = IB_WC_RECV;
+ wc->wr_id = qp->r_wr_id;
+ wc->status = IB_WC_SUCCESS;
+ wc->vendor_err = 0;
+ wc->byte_len = wqe->length;
+ wc->qp_num = qp->ibqp.qp_num;
+ wc->src_qp = qp->remote_qpn;
+ /* XXX do we know which pkey matched? Only needed for GSI. */
+ wc->pkey_index = 0;
+ wc->slid = qp->remote_ah_attr.dlid;
+ wc->sl = qp->remote_ah_attr.sl;
+ wc->dlid_path_bits = 0;
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
+ wqe->wr.send_flags & IB_SEND_SOLICITED);
+
+send_comp:
+ sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
+
+ if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &sqp->s_flags) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ wc->wr_id = wqe->wr.wr_id;
+ wc->status = IB_WC_SUCCESS;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc->vendor_err = 0;
+ wc->byte_len = wqe->length;
+ wc->qp_num = sqp->ibqp.qp_num;
+ wc->src_qp = 0;
+ wc->pkey_index = 0;
+ wc->slid = 0;
+ wc->sl = 0;
+ wc->dlid_path_bits = 0;
+ wc->port_num = 0;
+ ipath_cq_enter(to_icq(sqp->ibqp.send_cq), wc, 0);
+ }
+
+ /* Update s_last now that we are finished with the SWQE */
+ spin_lock_irqsave(&sqp->s_lock, flags);
+ if (++sqp->s_last >= sqp->s_size)
+ sqp->s_last = 0;
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto again;
+
+done:
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+}
+
+/**
+ * ipath_no_bufs_available - tell the layer driver we need buffers
+ * @qp: the QP that caused the problem
+ * @dev: the device we ran out of buffers on
+ *
+ * Called when we run out of PIO buffers.
+ */
+void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (qp->piowait.next == LIST_POISON1)
+ list_add_tail(&qp->piowait, &dev->piowait);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ /*
+ * Note that as soon as ipath_layer_want_buffer() is called and
+ * possibly before it returns, ipath_ib_piobufavail()
+ * could be called. If we are still in the tasklet function,
+ * tasklet_hi_schedule() will not call us until the next time
+ * tasklet_hi_schedule() is called.
+ * We clear the tasklet flag now since we are committing to return
+ * from the tasklet function.
+ */
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+ tasklet_unlock(&qp->s_task);
+ ipath_layer_want_buffer(dev->dd);
+ dev->n_piowait++;
+}
+
+/**
+ * ipath_post_rc_send - post RC and UC sends
+ * @qp: the QP to post on
+ * @wr: the work request to send
+ */
+int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+{
+ struct ipath_swqe *wqe;
+ unsigned long flags;
+ u32 next;
+ int i, j;
+ int acc;
+ int ret;
+
+ /*
+ * Don't allow RDMA reads or atomic operations on UC or
+ * undefined operations.
+ * Make sure buffer is large enough to hold the result for atomics.
+ */
+ if (qp->ibqp.qp_type == IB_QPT_UC) {
+ if ((unsigned) wr->opcode >= IB_WR_RDMA_READ) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD) {
+ ret = -EINVAL;
+ goto bail;
+ } else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
+ (wr->num_sge == 0 ||
+ wr->sg_list[0].length < sizeof(u64) ||
+ wr->sg_list[0].addr & (sizeof(u64) - 1))) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* IB spec says that num_sge == 0 is OK. */
+ if (wr->num_sge > qp->s_max_sge) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ spin_lock_irqsave(&qp->s_lock, flags);
+ next = qp->s_head + 1;
+ if (next >= qp->s_size)
+ next = 0;
+ if (next == qp->s_last) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ wqe = get_swqe_ptr(qp, qp->s_head);
+ wqe->wr = *wr;
+ wqe->ssn = qp->s_ssn++;
+ wqe->sg_list[0].mr = NULL;
+ wqe->sg_list[0].vaddr = NULL;
+ wqe->sg_list[0].length = 0;
+ wqe->sg_list[0].sge_length = 0;
+ wqe->length = 0;
+ acc = wr->opcode >= IB_WR_RDMA_READ ? IB_ACCESS_LOCAL_WRITE : 0;
+ for (i = 0, j = 0; i < wr->num_sge; i++) {
+ if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ret = -EINVAL;
+ goto bail;
+ }
+ if (wr->sg_list[i].length == 0)
+ continue;
+ if (!ipath_lkey_ok(&to_idev(qp->ibqp.device)->lk_table,
+ &wqe->sg_list[j], &wr->sg_list[i],
+ acc)) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ret = -EINVAL;
+ goto bail;
+ }
+ wqe->length += wr->sg_list[i].length;
+ j++;
+ }
+ wqe->wr.num_sge = j;
+ qp->s_head = next;
+ /*
+ * Wake up the send tasklet if the QP is not waiting
+ * for an RNR timeout.
+ */
+ next = qp->s_rnr_timeout;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ if (next == 0) {
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ ipath_do_uc_send((unsigned long) qp);
+ else
+ ipath_do_rc_send((unsigned long) qp);
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
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