1 What: /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 2 Date: January 2024 3 KernelVersion: 6.7 4 Contact: qat-linux@intel.com 5 Description: 6 (WO) This attribute is used to perform an operation on an SLA. 7 The supported operations are: add, update, rm, rm_all, and get. 8 9 Input values must be filled through the associated attribute in 10 this group before a write to this file. 11 If the operation completes successfully, the associated 12 attributes will be updated. 13 The associated attributes are: cir, pir, srv, rp, and id. 14 15 Supported operations: 16 17 * add: Creates a new SLA with the provided inputs from user. 18 * Inputs: cir, pir, srv, and rp 19 * Output: id 20 21 * get: Returns the configuration of the specified SLA in id attribute 22 * Inputs: id 23 * Outputs: cir, pir, srv, and rp 24 25 * update: Updates the SLA with new values set in the following attributes 26 * Inputs: id, cir, and pir 27 28 * rm: Removes the specified SLA in the id attribute. 29 * Inputs: id 30 31 * rm_all: Removes all the configured SLAs. 32 * Inputs: None 33 34 This attribute is only available for qat_4xxx devices. 35 36 What: /sys/bus/pci/devices/<BDF>/qat_rl/rp 37 Date: January 2024 38 KernelVersion: 6.7 39 Contact: qat-linux@intel.com 40 Description: 41 (RW) When read, reports the current assigned ring pairs for the 42 queried SLA. 43 When wrote to, configures the ring pairs associated to a new SLA. 44 45 The value is a 64-bit bit mask and is written/displayed in hex. 46 Each bit of this mask represents a single ring pair i.e., 47 bit 1 == ring pair id 0; bit 3 == ring pair id 2. 48 49 Selected ring pairs must to be assigned to a single service, 50 i.e. the one provided with the srv attribute. The service 51 assigned to a certain ring pair can be checked by querying 52 the attribute qat/rp2srv. 53 54 The maximum number of ring pairs is 4 per SLA. 55 56 Applicability in sla_op: 57 58 * WRITE: add operation 59 * READ: get operation 60 61 Example usage:: 62 63 ## Read 64 # echo 4 > /sys/bus/pci/devices/<BDF>/qat_rl/id 65 # cat /sys/bus/pci/devices/<BDF>/qat_rl/rp 66 0x5 67 68 ## Write 69 # echo 0x5 > /sys/bus/pci/devices/<BDF>/qat_rl/rp 70 71 This attribute is only available for qat_4xxx devices. 72 73 What: /sys/bus/pci/devices/<BDF>/qat_rl/id 74 Date: January 2024 75 KernelVersion: 6.7 76 Contact: qat-linux@intel.com 77 Description: 78 (RW) If written to, the value is used to retrieve a particular 79 SLA and operate on it. 80 This is valid only for the following operations: update, rm, 81 and get. 82 A read of this attribute is only guaranteed to have correct data 83 after creation of an SLA. 84 85 Applicability in sla_op: 86 87 * WRITE: rm and update operations 88 * READ: add and get operations 89 90 Example usage:: 91 92 ## Read 93 ## Set attributes e.g. cir, pir, srv, etc 94 # echo "add" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 95 # cat /sys/bus/pci/devices/<BDF>/qat_rl/id 96 4 97 98 ## Write 99 # echo 7 > /sys/bus/pci/devices/<BDF>/qat_rl/id 100 # echo "get" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 101 # cat /sys/bus/pci/devices/<BDF>/qat_rl/rp 102 0x5 ## ring pair ID 0 and ring pair ID 2 103 104 This attribute is only available for qat_4xxx devices. 105 106 What: /sys/bus/pci/devices/<BDF>/qat_rl/cir 107 Date: January 2024 108 KernelVersion: 6.7 109 Contact: qat-linux@intel.com 110 Description: 111 (RW) Committed information rate (CIR). Rate guaranteed to be 112 achieved by a particular SLA. The value is expressed in 113 permille scale, i.e. 1000 refers to the maximum device 114 throughput for a selected service. 115 116 After sending a "get" to sla_op, this will be populated with the 117 CIR for that queried SLA. 118 Write to this file before sending an "add/update" sla_op, to set 119 the SLA to the specified value. 120 121 Applicability in sla_op: 122 123 * WRITE: add and update operations 124 * READ: get operation 125 126 Example usage:: 127 128 ## Write 129 # echo 500 > /sys/bus/pci/devices/<BDF>/qat_rl/cir 130 # echo "add" /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 131 132 ## Read 133 # echo 4 > /sys/bus/pci/devices/<BDF>/qat_rl/id 134 # echo "get" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 135 # cat /sys/bus/pci/devices/<BDF>/qat_rl/cir 136 500 137 138 This attribute is only available for qat_4xxx devices. 139 140 What: /sys/bus/pci/devices/<BDF>/qat_rl/pir 141 Date: January 2024 142 KernelVersion: 6.7 143 Contact: qat-linux@intel.com 144 Description: 145 (RW) Peak information rate (PIR). The maximum rate that can be 146 achieved by that particular SLA. An SLA can reach a value 147 between CIR and PIR when the device is not fully utilized by 148 requests from other users (assigned to different SLAs). 149 150 After sending a "get" to sla_op, this will be populated with the 151 PIR for that queried SLA. 152 Write to this file before sending an "add/update" sla_op, to set 153 the SLA to the specified value. 154 155 Applicability in sla_op: 156 157 * WRITE: add and update operations 158 * READ: get operation 159 160 Example usage:: 161 162 ## Write 163 # echo 750 > /sys/bus/pci/devices/<BDF>/qat_rl/pir 164 # echo "add" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 165 166 ## Read 167 # echo 4 > /sys/bus/pci/devices/<BDF>/qat_rl/id 168 # echo "get" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 169 # cat /sys/bus/pci/devices/<BDF>/qat_rl/pir 170 750 171 172 This attribute is only available for qat_4xxx devices. 173 174 What: /sys/bus/pci/devices/<BDF>/qat_rl/srv 175 Date: January 2024 176 KernelVersion: 6.7 177 Contact: qat-linux@intel.com 178 Description: 179 (RW) Service (SRV). Represents the service (sym, asym, dc) 180 associated to an SLA. 181 Can be written to or queried to set/show the SRV type for an SLA. 182 The SRV attribute is used to specify the SRV type before adding 183 an SLA. After an SLA is configured, reports the service 184 associated to that SLA. 185 186 Applicability in sla_op: 187 188 * WRITE: add and update operations 189 * READ: get operation 190 191 Example usage:: 192 193 ## Write 194 # echo "dc" > /sys/bus/pci/devices/<BDF>/qat_rl/srv 195 # echo "add" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 196 # cat /sys/bus/pci/devices/<BDF>/qat_rl/id 197 4 198 199 ## Read 200 # echo 4 > /sys/bus/pci/devices/<BDF>/qat_rl/id 201 # echo "get" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 202 # cat /sys/bus/pci/devices/<BDF>/qat_rl/srv 203 dc 204 205 This attribute is only available for qat_4xxx devices. 206 207 What: /sys/bus/pci/devices/<BDF>/qat_rl/cap_rem 208 Date: January 2024 209 KernelVersion: 6.7 210 Contact: qat-linux@intel.com 211 Description: 212 (RW) This file will return the remaining capability for a 213 particular service/sla. This is the remaining value that a new 214 SLA can be set to or a current SLA can be increased with. 215 216 Example usage:: 217 218 # echo "asym" > /sys/bus/pci/devices/<BDF>/qat_rl/cap_rem 219 # cat /sys/bus/pci/devices/<BDF>/qat_rl/cap_rem 220 250 221 # echo 250 > /sys/bus/pci/devices/<BDF>/qat_rl/cir 222 # echo "add" > /sys/bus/pci/devices/<BDF>/qat_rl/sla_op 223 # cat /sys/bus/pci/devices/<BDF>/qat_rl/cap_rem 224 0 225 226 This attribute is only available for qat_4xxx devices.
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