IB/qib: Add congestion control agent implementation
Add a congestion control agent in the driver that handles gets and
sets from the congestion control manager in the fabric for the
Performance Scale Messaging (PSM) library.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/qib/qib_mad.h b/drivers/infiniband/hw/qib/qib_mad.h
index ecc416c..57bd3fa 100644
--- a/drivers/infiniband/hw/qib/qib_mad.h
+++ b/drivers/infiniband/hw/qib/qib_mad.h
@@ -1,6 +1,6 @@
/*
- * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
- * All rights reserved.
+ * Copyright (c) 2012 Intel Corporation. All rights reserved.
+ * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
@@ -31,6 +31,8 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
+#ifndef _QIB_MAD_H
+#define _QIB_MAD_H
#include <rdma/ib_pma.h>
@@ -223,6 +225,198 @@
#define IB_PMA_SEL_CONG_ROUTING 0x08
/*
+ * Congestion control class attributes
+ */
+#define IB_CC_ATTR_CLASSPORTINFO cpu_to_be16(0x0001)
+#define IB_CC_ATTR_NOTICE cpu_to_be16(0x0002)
+#define IB_CC_ATTR_CONGESTION_INFO cpu_to_be16(0x0011)
+#define IB_CC_ATTR_CONGESTION_KEY_INFO cpu_to_be16(0x0012)
+#define IB_CC_ATTR_CONGESTION_LOG cpu_to_be16(0x0013)
+#define IB_CC_ATTR_SWITCH_CONGESTION_SETTING cpu_to_be16(0x0014)
+#define IB_CC_ATTR_SWITCH_PORT_CONGESTION_SETTING cpu_to_be16(0x0015)
+#define IB_CC_ATTR_CA_CONGESTION_SETTING cpu_to_be16(0x0016)
+#define IB_CC_ATTR_CONGESTION_CONTROL_TABLE cpu_to_be16(0x0017)
+#define IB_CC_ATTR_TIME_STAMP cpu_to_be16(0x0018)
+
+/* generalizations for threshold values */
+#define IB_CC_THRESHOLD_NONE 0x0
+#define IB_CC_THRESHOLD_MIN 0x1
+#define IB_CC_THRESHOLD_MAX 0xf
+
+/* CCA MAD header constants */
+#define IB_CC_MAD_LOGDATA_LEN 32
+#define IB_CC_MAD_MGMTDATA_LEN 192
+
+struct ib_cc_mad {
+ u8 base_version;
+ u8 mgmt_class;
+ u8 class_version;
+ u8 method;
+ __be16 status;
+ __be16 class_specific;
+ __be64 tid;
+ __be16 attr_id;
+ __be16 resv;
+ __be32 attr_mod;
+ __be64 cckey;
+
+ /* For CongestionLog attribute only */
+ u8 log_data[IB_CC_MAD_LOGDATA_LEN];
+
+ u8 mgmt_data[IB_CC_MAD_MGMTDATA_LEN];
+} __packed;
+
+/*
+ * Congestion Control class portinfo capability mask bits
+ */
+#define IB_CC_CPI_CM_TRAP_GEN cpu_to_be16(1 << 0)
+#define IB_CC_CPI_CM_GET_SET_NOTICE cpu_to_be16(1 << 1)
+#define IB_CC_CPI_CM_CAP2 cpu_to_be16(1 << 2)
+#define IB_CC_CPI_CM_ENHANCEDPORT0_CC cpu_to_be16(1 << 8)
+
+struct ib_cc_classportinfo_attr {
+ 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;
+} __packed;
+
+/* Congestion control traps */
+#define IB_CC_TRAP_KEY_VIOLATION 0x0000
+
+struct ib_cc_trap_key_violation_attr {
+ __be16 source_lid;
+ u8 method;
+ u8 reserved1;
+ __be16 attrib_id;
+ __be32 attrib_mod;
+ __be32 qp;
+ __be64 cckey;
+ u8 sgid[16];
+ u8 padding[24];
+} __packed;
+
+/* Congestion info flags */
+#define IB_CC_CI_FLAGS_CREDIT_STARVATION 0x1
+#define IB_CC_TABLE_CAP_DEFAULT 31
+
+struct ib_cc_info_attr {
+ __be16 congestion_info;
+ u8 control_table_cap; /* Multiple of 64 entry unit CCTs */
+} __packed;
+
+struct ib_cc_key_info_attr {
+ __be64 cckey;
+ u8 protect;
+ __be16 lease_period;
+ __be16 violations;
+} __packed;
+
+#define IB_CC_CL_CA_LOGEVENTS_LEN 208
+
+struct ib_cc_log_attr {
+ u8 log_type;
+ u8 congestion_flags;
+ __be16 threshold_event_counter;
+ __be16 threshold_congestion_event_map;
+ __be16 current_time_stamp;
+ u8 log_events[IB_CC_CL_CA_LOGEVENTS_LEN];
+} __packed;
+
+#define IB_CC_CLEC_SERVICETYPE_RC 0x0
+#define IB_CC_CLEC_SERVICETYPE_UC 0x1
+#define IB_CC_CLEC_SERVICETYPE_RD 0x2
+#define IB_CC_CLEC_SERVICETYPE_UD 0x3
+
+struct ib_cc_log_event {
+ u8 local_qp_cn_entry;
+ u8 remote_qp_number_cn_entry[3];
+ u8 sl_cn_entry:4;
+ u8 service_type_cn_entry:4;
+ __be32 remote_lid_cn_entry;
+ __be32 timestamp_cn_entry;
+} __packed;
+
+/* Sixteen congestion entries */
+#define IB_CC_CCS_ENTRIES 16
+
+/* Port control flags */
+#define IB_CC_CCS_PC_SL_BASED 0x01
+
+struct ib_cc_congestion_entry {
+ u8 ccti_increase;
+ __be16 ccti_timer;
+ u8 trigger_threshold;
+ u8 ccti_min; /* min CCTI for cc table */
+} __packed;
+
+struct ib_cc_congestion_entry_shadow {
+ u8 ccti_increase;
+ u16 ccti_timer;
+ u8 trigger_threshold;
+ u8 ccti_min; /* min CCTI for cc table */
+} __packed;
+
+struct ib_cc_congestion_setting_attr {
+ __be16 port_control;
+ __be16 control_map;
+ struct ib_cc_congestion_entry entries[IB_CC_CCS_ENTRIES];
+} __packed;
+
+struct ib_cc_congestion_setting_attr_shadow {
+ u16 port_control;
+ u16 control_map;
+ struct ib_cc_congestion_entry_shadow entries[IB_CC_CCS_ENTRIES];
+} __packed;
+
+#define IB_CC_TABLE_ENTRY_INCREASE_DEFAULT 1
+#define IB_CC_TABLE_ENTRY_TIMER_DEFAULT 1
+
+/* 64 Congestion Control table entries in a single MAD */
+#define IB_CCT_ENTRIES 64
+#define IB_CCT_MIN_ENTRIES (IB_CCT_ENTRIES * 2)
+
+struct ib_cc_table_entry {
+ __be16 entry; /* shift:2, multiplier:14 */
+};
+
+struct ib_cc_table_entry_shadow {
+ u16 entry; /* shift:2, multiplier:14 */
+};
+
+struct ib_cc_table_attr {
+ __be16 ccti_limit; /* max CCTI for cc table */
+ struct ib_cc_table_entry ccti_entries[IB_CCT_ENTRIES];
+} __packed;
+
+struct ib_cc_table_attr_shadow {
+ u16 ccti_limit; /* max CCTI for cc table */
+ struct ib_cc_table_entry_shadow ccti_entries[IB_CCT_ENTRIES];
+} __packed;
+
+#define CC_TABLE_SHADOW_MAX \
+ (IB_CC_TABLE_CAP_DEFAULT * IB_CCT_ENTRIES)
+
+struct cc_table_shadow {
+ u16 ccti_last_entry;
+ struct ib_cc_table_entry_shadow entries[CC_TABLE_SHADOW_MAX];
+} __packed;
+
+#endif /* _QIB_MAD_H */
+/*
* 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.