119 lines
2.7 KiB
Bash
119 lines
2.7 KiB
Bash
#!/bin/bash
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# Copyright 2016 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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function usage() {
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echo -e "$0: run a NPU hardware procedure (requires root)\n"
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echo -e "Usage: $0 <PCI bdfn> <procedure number>\n"
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echo -e "Example: $0 0008:00:01.1 1"
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echo -e "Procedures are documented in skiboot/doc/nvlink.rst"
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}
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function check_root() {
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if [ "$(id -u)" != "0" ]; then
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echo -e "Error: $0 must be run as root\n" 1>&2
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exit 1
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fi
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}
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function check_args() {
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if [ "$#" -eq 0 ]; then
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usage
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exit 1
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fi
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if [ "$#" -gt 2 ]; then
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echo -e "Error: too many arguments\n" 1>&2
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usage
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exit 1
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fi
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if [[ "$1" == "-h" || "$1" == "--help" ]]; then
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usage
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exit 0
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fi
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if ! [ "$2" -eq "$2" ] 2>/dev/null; then
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echo -e "Procedure must be a decimal number\n" 1>&2
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usage
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exit 1
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fi
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if [[ "$2" -lt "0" || "$2" -gt "12" ]]; then
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echo -e "Invalid procedure number\n" 1>&2
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usage
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exit 2
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fi
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pci_check=$(lspci -s $1)
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if [[ $? -ne 0 || $pci_check == "" ]]; then
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echo -e "Invalid PCI device\n" 1>&2
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usage
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exit 2
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fi
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}
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function run_procedure() {
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# Convert procedure number into hex
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procedure=$(echo "obase=16; $2" | bc)
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# Check the status register to make sure we can run a procedure
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status=$(setpci -s $1 0x84.L)
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if [[ $status == 8000000* ]]; then
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echo "Procedure in progress, try again." 1>&2
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echo "If that doesn't work, use procedure 0 to abort." 1>&2
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exit 3
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fi
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# Start the procedure
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setpci -s $1 0x88.L=0x0000000$procedure >/dev/null
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if [ $? -ne 0 ]; then
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echo "Control register write failed!" 1>&2
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exit 3
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fi
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iterations=1
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while [[ $(setpci -s $1 0x84.L) == 8000000* ]]; do
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((iterations++))
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done
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# Check again, procedure should be finished
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status=$(setpci -s $1 0x84.L)
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echo "Done in $iterations iteration(s)!"
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if [[ $status == 40000000 ]]; then
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echo "Procedure completed successfully."
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exit 0
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elif [[ $status == 40000001 ]]; then
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echo "Transient failure, try again." 1>&2
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exit 4
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elif [[ $status == 40000002 ]]; then
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echo "Permanent failure, reboot required?" 1>&2
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exit 5
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elif [[ $status == 40000003 ]]; then
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echo "Procedure aborted." 1>&2
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exit 6
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elif [[ $status == 40000004 ]]; then
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echo "Unsupported procedure." 1>&2
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exit 7
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fi
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}
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check_args "$@"
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check_root
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run_procedure "$1" "$2"
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