648 lines
23 KiB
C
648 lines
23 KiB
C
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/*
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* Copyright 2015 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <asm/byteorder.h>
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#include "hcalls.h"
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#include "trace.h"
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#define CXL_HCALL_TIMEOUT 60000
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#define CXL_HCALL_TIMEOUT_DOWNLOAD 120000
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#define H_ATTACH_CA_PROCESS 0x344
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#define H_CONTROL_CA_FUNCTION 0x348
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#define H_DETACH_CA_PROCESS 0x34C
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#define H_COLLECT_CA_INT_INFO 0x350
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#define H_CONTROL_CA_FAULTS 0x354
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#define H_DOWNLOAD_CA_FUNCTION 0x35C
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#define H_DOWNLOAD_CA_FACILITY 0x364
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#define H_CONTROL_CA_FACILITY 0x368
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#define H_CONTROL_CA_FUNCTION_RESET 1 /* perform a reset */
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#define H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS 2 /* suspend a process from being executed */
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#define H_CONTROL_CA_FUNCTION_RESUME_PROCESS 3 /* resume a process to be executed */
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#define H_CONTROL_CA_FUNCTION_READ_ERR_STATE 4 /* read the error state */
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#define H_CONTROL_CA_FUNCTION_GET_AFU_ERR 5 /* collect the AFU error buffer */
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#define H_CONTROL_CA_FUNCTION_GET_CONFIG 6 /* collect configuration record */
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#define H_CONTROL_CA_FUNCTION_GET_DOWNLOAD_STATE 7 /* query to return download status */
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#define H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS 8 /* terminate the process before completion */
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#define H_CONTROL_CA_FUNCTION_COLLECT_VPD 9 /* collect VPD */
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#define H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT 11 /* read the function-wide error data based on an interrupt */
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#define H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT 12 /* acknowledge function-wide error data based on an interrupt */
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#define H_CONTROL_CA_FUNCTION_GET_ERROR_LOG 13 /* retrieve the Platform Log ID (PLID) of an error log */
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#define H_CONTROL_CA_FAULTS_RESPOND_PSL 1
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#define H_CONTROL_CA_FAULTS_RESPOND_AFU 2
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#define H_CONTROL_CA_FACILITY_RESET 1 /* perform a reset */
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#define H_CONTROL_CA_FACILITY_COLLECT_VPD 2 /* collect VPD */
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#define H_DOWNLOAD_CA_FACILITY_DOWNLOAD 1 /* download adapter image */
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#define H_DOWNLOAD_CA_FACILITY_VALIDATE 2 /* validate adapter image */
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#define _CXL_LOOP_HCALL(call, rc, retbuf, fn, ...) \
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{ \
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unsigned int delay, total_delay = 0; \
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u64 token = 0; \
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\
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memset(retbuf, 0, sizeof(retbuf)); \
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while (1) { \
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rc = call(fn, retbuf, __VA_ARGS__, token); \
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token = retbuf[0]; \
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if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) \
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break; \
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\
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if (rc == H_BUSY) \
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delay = 10; \
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else \
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delay = get_longbusy_msecs(rc); \
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\
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total_delay += delay; \
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if (total_delay > CXL_HCALL_TIMEOUT) { \
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WARN(1, "Warning: Giving up waiting for CXL hcall " \
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"%#x after %u msec\n", fn, total_delay); \
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rc = H_BUSY; \
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break; \
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} \
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msleep(delay); \
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} \
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}
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#define CXL_H_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall, __VA_ARGS__)
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#define CXL_H9_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall9, __VA_ARGS__)
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#define _PRINT_MSG(rc, format, ...) \
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{ \
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if ((rc != H_SUCCESS) && (rc != H_CONTINUE)) \
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pr_err(format, __VA_ARGS__); \
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else \
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pr_devel(format, __VA_ARGS__); \
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} \
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static char *afu_op_names[] = {
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"UNKNOWN_OP", /* 0 undefined */
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"RESET", /* 1 */
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"SUSPEND_PROCESS", /* 2 */
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"RESUME_PROCESS", /* 3 */
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"READ_ERR_STATE", /* 4 */
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"GET_AFU_ERR", /* 5 */
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"GET_CONFIG", /* 6 */
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"GET_DOWNLOAD_STATE", /* 7 */
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"TERMINATE_PROCESS", /* 8 */
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"COLLECT_VPD", /* 9 */
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"UNKNOWN_OP", /* 10 undefined */
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"GET_FUNCTION_ERR_INT", /* 11 */
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"ACK_FUNCTION_ERR_INT", /* 12 */
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"GET_ERROR_LOG", /* 13 */
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};
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static char *control_adapter_op_names[] = {
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"UNKNOWN_OP", /* 0 undefined */
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"RESET", /* 1 */
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"COLLECT_VPD", /* 2 */
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};
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static char *download_op_names[] = {
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"UNKNOWN_OP", /* 0 undefined */
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"DOWNLOAD", /* 1 */
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"VALIDATE", /* 2 */
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};
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static char *op_str(unsigned int op, char *name_array[], int array_len)
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{
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if (op >= array_len)
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return "UNKNOWN_OP";
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return name_array[op];
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}
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#define OP_STR(op, name_array) op_str(op, name_array, ARRAY_SIZE(name_array))
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#define OP_STR_AFU(op) OP_STR(op, afu_op_names)
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#define OP_STR_CONTROL_ADAPTER(op) OP_STR(op, control_adapter_op_names)
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#define OP_STR_DOWNLOAD_ADAPTER(op) OP_STR(op, download_op_names)
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long cxl_h_attach_process(u64 unit_address,
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struct cxl_process_element_hcall *element,
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u64 *process_token, u64 *mmio_addr, u64 *mmio_size)
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{
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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long rc;
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CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_ATTACH_CA_PROCESS, unit_address, virt_to_phys(element));
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_PRINT_MSG(rc, "cxl_h_attach_process(%#.16llx, %#.16lx): %li\n",
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unit_address, virt_to_phys(element), rc);
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trace_cxl_hcall_attach(unit_address, virt_to_phys(element), retbuf[0], retbuf[1], retbuf[2], rc);
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pr_devel("token: 0x%.8lx mmio_addr: 0x%lx mmio_size: 0x%lx\nProcess Element Structure:\n",
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retbuf[0], retbuf[1], retbuf[2]);
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cxl_dump_debug_buffer(element, sizeof(*element));
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switch (rc) {
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case H_SUCCESS: /* The process info is attached to the coherent platform function */
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*process_token = retbuf[0];
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if (mmio_addr)
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*mmio_addr = retbuf[1];
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if (mmio_size)
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*mmio_size = retbuf[2];
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return 0;
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case H_PARAMETER: /* An incorrect parameter was supplied. */
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case H_FUNCTION: /* The function is not supported. */
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return -EINVAL;
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case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
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case H_RESOURCE: /* The coherent platform function does not have enough additional resource to attach the process */
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case H_HARDWARE: /* A hardware event prevented the attach operation */
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case H_STATE: /* The coherent platform function is not in a valid state */
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case H_BUSY:
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return -EBUSY;
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default:
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WARN(1, "Unexpected return code: %lx", rc);
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return -EINVAL;
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}
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}
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/**
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* cxl_h_detach_process - Detach a process element from a coherent
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* platform function.
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*/
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long cxl_h_detach_process(u64 unit_address, u64 process_token)
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{
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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long rc;
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CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_DETACH_CA_PROCESS, unit_address, process_token);
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_PRINT_MSG(rc, "cxl_h_detach_process(%#.16llx, 0x%.8llx): %li\n", unit_address, process_token, rc);
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trace_cxl_hcall_detach(unit_address, process_token, rc);
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switch (rc) {
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case H_SUCCESS: /* The process was detached from the coherent platform function */
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return 0;
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case H_PARAMETER: /* An incorrect parameter was supplied. */
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return -EINVAL;
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case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
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case H_RESOURCE: /* The function has page table mappings for MMIO */
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case H_HARDWARE: /* A hardware event prevented the detach operation */
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case H_STATE: /* The coherent platform function is not in a valid state */
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case H_BUSY:
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return -EBUSY;
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default:
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WARN(1, "Unexpected return code: %lx", rc);
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return -EINVAL;
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}
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}
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/**
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* cxl_h_control_function - This H_CONTROL_CA_FUNCTION hypervisor call allows
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* the partition to manipulate or query
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* certain coherent platform function behaviors.
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*/
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static long cxl_h_control_function(u64 unit_address, u64 op,
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u64 p1, u64 p2, u64 p3, u64 p4, u64 *out)
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{
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unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
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long rc;
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CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FUNCTION, unit_address, op, p1, p2, p3, p4);
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_PRINT_MSG(rc, "cxl_h_control_function(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n",
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unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
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trace_cxl_hcall_control_function(unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
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switch (rc) {
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case H_SUCCESS: /* The operation is completed for the coherent platform function */
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if ((op == H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT ||
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op == H_CONTROL_CA_FUNCTION_READ_ERR_STATE ||
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op == H_CONTROL_CA_FUNCTION_COLLECT_VPD))
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*out = retbuf[0];
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return 0;
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case H_PARAMETER: /* An incorrect parameter was supplied. */
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case H_FUNCTION: /* The function is not supported. */
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case H_NOT_FOUND: /* The operation supplied was not valid */
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case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */
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case H_SG_LIST: /* An block list entry was invalid */
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return -EINVAL;
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case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
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case H_RESOURCE: /* The function has page table mappings for MMIO */
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case H_HARDWARE: /* A hardware event prevented the attach operation */
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case H_STATE: /* The coherent platform function is not in a valid state */
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case H_BUSY:
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return -EBUSY;
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default:
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WARN(1, "Unexpected return code: %lx", rc);
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return -EINVAL;
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}
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}
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/**
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* cxl_h_reset_afu - Perform a reset to the coherent platform function.
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*/
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long cxl_h_reset_afu(u64 unit_address)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_RESET,
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0, 0, 0, 0,
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NULL);
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}
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/**
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* cxl_h_suspend_process - Suspend a process from being executed
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* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
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* process was attached.
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*/
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long cxl_h_suspend_process(u64 unit_address, u64 process_token)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS,
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process_token, 0, 0, 0,
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NULL);
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}
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/**
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* cxl_h_resume_process - Resume a process to be executed
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* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
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* process was attached.
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*/
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long cxl_h_resume_process(u64 unit_address, u64 process_token)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_RESUME_PROCESS,
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process_token, 0, 0, 0,
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NULL);
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}
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/**
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* cxl_h_read_error_state - Checks the error state of the coherent
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* platform function.
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* R4 contains the error state
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*/
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long cxl_h_read_error_state(u64 unit_address, u64 *state)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_READ_ERR_STATE,
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0, 0, 0, 0,
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state);
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}
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/**
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* cxl_h_get_afu_err - collect the AFU error buffer
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* Parameter1 = byte offset into error buffer to retrieve, valid values
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* are between 0 and (ibm,error-buffer-size - 1)
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* Parameter2 = 4K aligned real address of error buffer, to be filled in
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* Parameter3 = length of error buffer, valid values are 4K or less
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*/
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long cxl_h_get_afu_err(u64 unit_address, u64 offset,
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u64 buf_address, u64 len)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_GET_AFU_ERR,
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offset, buf_address, len, 0,
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NULL);
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}
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/**
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* cxl_h_get_config - collect configuration record for the
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* coherent platform function
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* Parameter1 = # of configuration record to retrieve, valid values are
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* between 0 and (ibm,#config-records - 1)
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* Parameter2 = byte offset into configuration record to retrieve,
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* valid values are between 0 and (ibm,config-record-size - 1)
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* Parameter3 = 4K aligned real address of configuration record buffer,
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* to be filled in
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* Parameter4 = length of configuration buffer, valid values are 4K or less
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*/
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long cxl_h_get_config(u64 unit_address, u64 cr_num, u64 offset,
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u64 buf_address, u64 len)
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{
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return cxl_h_control_function(unit_address,
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H_CONTROL_CA_FUNCTION_GET_CONFIG,
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cr_num, offset, buf_address, len,
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NULL);
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}
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/**
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* cxl_h_terminate_process - Terminate the process before completion
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* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
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* process was attached.
|
||
|
|
*/
|
||
|
|
long cxl_h_terminate_process(u64 unit_address, u64 process_token)
|
||
|
|
{
|
||
|
|
return cxl_h_control_function(unit_address,
|
||
|
|
H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS,
|
||
|
|
process_token, 0, 0, 0,
|
||
|
|
NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_collect_vpd - Collect VPD for the coherent platform function.
|
||
|
|
* Parameter1 = # of VPD record to retrieve, valid values are between 0
|
||
|
|
* and (ibm,#config-records - 1).
|
||
|
|
* Parameter2 = 4K naturally aligned real buffer containing block
|
||
|
|
* list entries
|
||
|
|
* Parameter3 = number of block list entries in the block list, valid
|
||
|
|
* values are between 0 and 256
|
||
|
|
*/
|
||
|
|
long cxl_h_collect_vpd(u64 unit_address, u64 record, u64 list_address,
|
||
|
|
u64 num, u64 *out)
|
||
|
|
{
|
||
|
|
return cxl_h_control_function(unit_address,
|
||
|
|
H_CONTROL_CA_FUNCTION_COLLECT_VPD,
|
||
|
|
record, list_address, num, 0,
|
||
|
|
out);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_get_fn_error_interrupt - Read the function-wide error data based on an interrupt
|
||
|
|
*/
|
||
|
|
long cxl_h_get_fn_error_interrupt(u64 unit_address, u64 *reg)
|
||
|
|
{
|
||
|
|
return cxl_h_control_function(unit_address,
|
||
|
|
H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT,
|
||
|
|
0, 0, 0, 0, reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_ack_fn_error_interrupt - Acknowledge function-wide error data
|
||
|
|
* based on an interrupt
|
||
|
|
* Parameter1 = value to write to the function-wide error interrupt register
|
||
|
|
*/
|
||
|
|
long cxl_h_ack_fn_error_interrupt(u64 unit_address, u64 value)
|
||
|
|
{
|
||
|
|
return cxl_h_control_function(unit_address,
|
||
|
|
H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT,
|
||
|
|
value, 0, 0, 0,
|
||
|
|
NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_get_error_log - Retrieve the Platform Log ID (PLID) of
|
||
|
|
* an error log
|
||
|
|
*/
|
||
|
|
long cxl_h_get_error_log(u64 unit_address, u64 value)
|
||
|
|
{
|
||
|
|
return cxl_h_control_function(unit_address,
|
||
|
|
H_CONTROL_CA_FUNCTION_GET_ERROR_LOG,
|
||
|
|
0, 0, 0, 0,
|
||
|
|
NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_collect_int_info - Collect interrupt info about a coherent
|
||
|
|
* platform function after an interrupt occurred.
|
||
|
|
*/
|
||
|
|
long cxl_h_collect_int_info(u64 unit_address, u64 process_token,
|
||
|
|
struct cxl_irq_info *info)
|
||
|
|
{
|
||
|
|
long rc;
|
||
|
|
|
||
|
|
BUG_ON(sizeof(*info) != sizeof(unsigned long[PLPAR_HCALL9_BUFSIZE]));
|
||
|
|
|
||
|
|
rc = plpar_hcall9(H_COLLECT_CA_INT_INFO, (unsigned long *) info,
|
||
|
|
unit_address, process_token);
|
||
|
|
_PRINT_MSG(rc, "cxl_h_collect_int_info(%#.16llx, 0x%llx): %li\n",
|
||
|
|
unit_address, process_token, rc);
|
||
|
|
trace_cxl_hcall_collect_int_info(unit_address, process_token, rc);
|
||
|
|
|
||
|
|
switch (rc) {
|
||
|
|
case H_SUCCESS: /* The interrupt info is returned in return registers. */
|
||
|
|
pr_devel("dsisr:%#llx, dar:%#llx, dsr:%#llx, pid:%u, tid:%u, afu_err:%#llx, errstat:%#llx\n",
|
||
|
|
info->dsisr, info->dar, info->dsr, info->pid,
|
||
|
|
info->tid, info->afu_err, info->errstat);
|
||
|
|
return 0;
|
||
|
|
case H_PARAMETER: /* An incorrect parameter was supplied. */
|
||
|
|
return -EINVAL;
|
||
|
|
case H_AUTHORITY: /* The partition does not have authority to perform this hcall. */
|
||
|
|
case H_HARDWARE: /* A hardware event prevented the collection of the interrupt info.*/
|
||
|
|
case H_STATE: /* The coherent platform function is not in a valid state to collect interrupt info. */
|
||
|
|
return -EBUSY;
|
||
|
|
default:
|
||
|
|
WARN(1, "Unexpected return code: %lx", rc);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_control_faults - Control the operation of a coherent platform
|
||
|
|
* function after a fault occurs.
|
||
|
|
*
|
||
|
|
* Parameters
|
||
|
|
* control-mask: value to control the faults
|
||
|
|
* looks like PSL_TFC_An shifted >> 32
|
||
|
|
* reset-mask: mask to control reset of function faults
|
||
|
|
* Set reset_mask = 1 to reset PSL errors
|
||
|
|
*/
|
||
|
|
long cxl_h_control_faults(u64 unit_address, u64 process_token,
|
||
|
|
u64 control_mask, u64 reset_mask)
|
||
|
|
{
|
||
|
|
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
|
||
|
|
long rc;
|
||
|
|
|
||
|
|
memset(retbuf, 0, sizeof(retbuf));
|
||
|
|
|
||
|
|
rc = plpar_hcall(H_CONTROL_CA_FAULTS, retbuf, unit_address,
|
||
|
|
H_CONTROL_CA_FAULTS_RESPOND_PSL, process_token,
|
||
|
|
control_mask, reset_mask);
|
||
|
|
_PRINT_MSG(rc, "cxl_h_control_faults(%#.16llx, 0x%llx, %#llx, %#llx): %li (%#lx)\n",
|
||
|
|
unit_address, process_token, control_mask, reset_mask,
|
||
|
|
rc, retbuf[0]);
|
||
|
|
trace_cxl_hcall_control_faults(unit_address, process_token,
|
||
|
|
control_mask, reset_mask, retbuf[0], rc);
|
||
|
|
|
||
|
|
switch (rc) {
|
||
|
|
case H_SUCCESS: /* Faults were successfully controlled for the function. */
|
||
|
|
return 0;
|
||
|
|
case H_PARAMETER: /* An incorrect parameter was supplied. */
|
||
|
|
return -EINVAL;
|
||
|
|
case H_HARDWARE: /* A hardware event prevented the control of faults. */
|
||
|
|
case H_STATE: /* The function was in an invalid state. */
|
||
|
|
case H_AUTHORITY: /* The partition does not have authority to perform this hcall; the coherent platform facilities may need to be licensed. */
|
||
|
|
return -EBUSY;
|
||
|
|
case H_FUNCTION: /* The function is not supported */
|
||
|
|
case H_NOT_FOUND: /* The operation supplied was not valid */
|
||
|
|
return -EINVAL;
|
||
|
|
default:
|
||
|
|
WARN(1, "Unexpected return code: %lx", rc);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_control_facility - This H_CONTROL_CA_FACILITY hypervisor call
|
||
|
|
* allows the partition to manipulate or query
|
||
|
|
* certain coherent platform facility behaviors.
|
||
|
|
*/
|
||
|
|
static long cxl_h_control_facility(u64 unit_address, u64 op,
|
||
|
|
u64 p1, u64 p2, u64 p3, u64 p4, u64 *out)
|
||
|
|
{
|
||
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
|
||
|
|
long rc;
|
||
|
|
|
||
|
|
CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FACILITY, unit_address, op, p1, p2, p3, p4);
|
||
|
|
_PRINT_MSG(rc, "cxl_h_control_facility(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n",
|
||
|
|
unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc);
|
||
|
|
trace_cxl_hcall_control_facility(unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc);
|
||
|
|
|
||
|
|
switch (rc) {
|
||
|
|
case H_SUCCESS: /* The operation is completed for the coherent platform facility */
|
||
|
|
if (op == H_CONTROL_CA_FACILITY_COLLECT_VPD)
|
||
|
|
*out = retbuf[0];
|
||
|
|
return 0;
|
||
|
|
case H_PARAMETER: /* An incorrect parameter was supplied. */
|
||
|
|
case H_FUNCTION: /* The function is not supported. */
|
||
|
|
case H_NOT_FOUND: /* The operation supplied was not valid */
|
||
|
|
case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */
|
||
|
|
case H_SG_LIST: /* An block list entry was invalid */
|
||
|
|
return -EINVAL;
|
||
|
|
case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
|
||
|
|
case H_RESOURCE: /* The function has page table mappings for MMIO */
|
||
|
|
case H_HARDWARE: /* A hardware event prevented the attach operation */
|
||
|
|
case H_STATE: /* The coherent platform facility is not in a valid state */
|
||
|
|
case H_BUSY:
|
||
|
|
return -EBUSY;
|
||
|
|
default:
|
||
|
|
WARN(1, "Unexpected return code: %lx", rc);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_reset_adapter - Perform a reset to the coherent platform facility.
|
||
|
|
*/
|
||
|
|
long cxl_h_reset_adapter(u64 unit_address)
|
||
|
|
{
|
||
|
|
return cxl_h_control_facility(unit_address,
|
||
|
|
H_CONTROL_CA_FACILITY_RESET,
|
||
|
|
0, 0, 0, 0,
|
||
|
|
NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_collect_vpd - Collect VPD for the coherent platform function.
|
||
|
|
* Parameter1 = 4K naturally aligned real buffer containing block
|
||
|
|
* list entries
|
||
|
|
* Parameter2 = number of block list entries in the block list, valid
|
||
|
|
* values are between 0 and 256
|
||
|
|
*/
|
||
|
|
long cxl_h_collect_vpd_adapter(u64 unit_address, u64 list_address,
|
||
|
|
u64 num, u64 *out)
|
||
|
|
{
|
||
|
|
return cxl_h_control_facility(unit_address,
|
||
|
|
H_CONTROL_CA_FACILITY_COLLECT_VPD,
|
||
|
|
list_address, num, 0, 0,
|
||
|
|
out);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_download_facility - This H_DOWNLOAD_CA_FACILITY
|
||
|
|
* hypervisor call provide platform support for
|
||
|
|
* downloading a base adapter image to the coherent
|
||
|
|
* platform facility, and for validating the entire
|
||
|
|
* image after the download.
|
||
|
|
* Parameters
|
||
|
|
* op: operation to perform to the coherent platform function
|
||
|
|
* Download: operation = 1, the base image in the coherent platform
|
||
|
|
* facility is first erased, and then
|
||
|
|
* programmed using the image supplied
|
||
|
|
* in the scatter/gather list.
|
||
|
|
* Validate: operation = 2, the base image in the coherent platform
|
||
|
|
* facility is compared with the image
|
||
|
|
* supplied in the scatter/gather list.
|
||
|
|
* list_address: 4K naturally aligned real buffer containing
|
||
|
|
* scatter/gather list entries.
|
||
|
|
* num: number of block list entries in the scatter/gather list.
|
||
|
|
*/
|
||
|
|
static long cxl_h_download_facility(u64 unit_address, u64 op,
|
||
|
|
u64 list_address, u64 num,
|
||
|
|
u64 *out)
|
||
|
|
{
|
||
|
|
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
|
||
|
|
unsigned int delay, total_delay = 0;
|
||
|
|
u64 token = 0;
|
||
|
|
long rc;
|
||
|
|
|
||
|
|
if (*out != 0)
|
||
|
|
token = *out;
|
||
|
|
|
||
|
|
memset(retbuf, 0, sizeof(retbuf));
|
||
|
|
while (1) {
|
||
|
|
rc = plpar_hcall(H_DOWNLOAD_CA_FACILITY, retbuf,
|
||
|
|
unit_address, op, list_address, num,
|
||
|
|
token);
|
||
|
|
token = retbuf[0];
|
||
|
|
if (rc != H_BUSY && !H_IS_LONG_BUSY(rc))
|
||
|
|
break;
|
||
|
|
|
||
|
|
if (rc != H_BUSY) {
|
||
|
|
delay = get_longbusy_msecs(rc);
|
||
|
|
total_delay += delay;
|
||
|
|
if (total_delay > CXL_HCALL_TIMEOUT_DOWNLOAD) {
|
||
|
|
WARN(1, "Warning: Giving up waiting for CXL hcall "
|
||
|
|
"%#x after %u msec\n",
|
||
|
|
H_DOWNLOAD_CA_FACILITY, total_delay);
|
||
|
|
rc = H_BUSY;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
msleep(delay);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_PRINT_MSG(rc, "cxl_h_download_facility(%#.16llx, %s(%#llx, %#llx), %#lx): %li\n",
|
||
|
|
unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc);
|
||
|
|
trace_cxl_hcall_download_facility(unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc);
|
||
|
|
|
||
|
|
switch (rc) {
|
||
|
|
case H_SUCCESS: /* The operation is completed for the coherent platform facility */
|
||
|
|
return 0;
|
||
|
|
case H_PARAMETER: /* An incorrect parameter was supplied */
|
||
|
|
case H_FUNCTION: /* The function is not supported. */
|
||
|
|
case H_SG_LIST: /* An block list entry was invalid */
|
||
|
|
case H_BAD_DATA: /* Image verification failed */
|
||
|
|
return -EINVAL;
|
||
|
|
case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
|
||
|
|
case H_RESOURCE: /* The function has page table mappings for MMIO */
|
||
|
|
case H_HARDWARE: /* A hardware event prevented the attach operation */
|
||
|
|
case H_STATE: /* The coherent platform facility is not in a valid state */
|
||
|
|
case H_BUSY:
|
||
|
|
return -EBUSY;
|
||
|
|
case H_CONTINUE:
|
||
|
|
*out = retbuf[0];
|
||
|
|
return 1; /* More data is needed for the complete image */
|
||
|
|
default:
|
||
|
|
WARN(1, "Unexpected return code: %lx", rc);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_download_adapter_image - Download the base image to the coherent
|
||
|
|
* platform facility.
|
||
|
|
*/
|
||
|
|
long cxl_h_download_adapter_image(u64 unit_address,
|
||
|
|
u64 list_address, u64 num,
|
||
|
|
u64 *out)
|
||
|
|
{
|
||
|
|
return cxl_h_download_facility(unit_address,
|
||
|
|
H_DOWNLOAD_CA_FACILITY_DOWNLOAD,
|
||
|
|
list_address, num, out);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* cxl_h_validate_adapter_image - Validate the base image in the coherent
|
||
|
|
* platform facility.
|
||
|
|
*/
|
||
|
|
long cxl_h_validate_adapter_image(u64 unit_address,
|
||
|
|
u64 list_address, u64 num,
|
||
|
|
u64 *out)
|
||
|
|
{
|
||
|
|
return cxl_h_download_facility(unit_address,
|
||
|
|
H_DOWNLOAD_CA_FACILITY_VALIDATE,
|
||
|
|
list_address, num, out);
|
||
|
|
}
|