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linux/drivers/misc/cxl/hcalls.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

644 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2015 IBM Corp.
*/
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <asm/byteorder.h>
#include "hcalls.h"
#include "trace.h"
#define CXL_HCALL_TIMEOUT 60000
#define CXL_HCALL_TIMEOUT_DOWNLOAD 120000
#define H_ATTACH_CA_PROCESS 0x344
#define H_CONTROL_CA_FUNCTION 0x348
#define H_DETACH_CA_PROCESS 0x34C
#define H_COLLECT_CA_INT_INFO 0x350
#define H_CONTROL_CA_FAULTS 0x354
#define H_DOWNLOAD_CA_FUNCTION 0x35C
#define H_DOWNLOAD_CA_FACILITY 0x364
#define H_CONTROL_CA_FACILITY 0x368
#define H_CONTROL_CA_FUNCTION_RESET 1 /* perform a reset */
#define H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS 2 /* suspend a process from being executed */
#define H_CONTROL_CA_FUNCTION_RESUME_PROCESS 3 /* resume a process to be executed */
#define H_CONTROL_CA_FUNCTION_READ_ERR_STATE 4 /* read the error state */
#define H_CONTROL_CA_FUNCTION_GET_AFU_ERR 5 /* collect the AFU error buffer */
#define H_CONTROL_CA_FUNCTION_GET_CONFIG 6 /* collect configuration record */
#define H_CONTROL_CA_FUNCTION_GET_DOWNLOAD_STATE 7 /* query to return download status */
#define H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS 8 /* terminate the process before completion */
#define H_CONTROL_CA_FUNCTION_COLLECT_VPD 9 /* collect VPD */
#define H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT 11 /* read the function-wide error data based on an interrupt */
#define H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT 12 /* acknowledge function-wide error data based on an interrupt */
#define H_CONTROL_CA_FUNCTION_GET_ERROR_LOG 13 /* retrieve the Platform Log ID (PLID) of an error log */
#define H_CONTROL_CA_FAULTS_RESPOND_PSL 1
#define H_CONTROL_CA_FAULTS_RESPOND_AFU 2
#define H_CONTROL_CA_FACILITY_RESET 1 /* perform a reset */
#define H_CONTROL_CA_FACILITY_COLLECT_VPD 2 /* collect VPD */
#define H_DOWNLOAD_CA_FACILITY_DOWNLOAD 1 /* download adapter image */
#define H_DOWNLOAD_CA_FACILITY_VALIDATE 2 /* validate adapter image */
#define _CXL_LOOP_HCALL(call, rc, retbuf, fn, ...) \
{ \
unsigned int delay, total_delay = 0; \
u64 token = 0; \
\
memset(retbuf, 0, sizeof(retbuf)); \
while (1) { \
rc = call(fn, retbuf, __VA_ARGS__, token); \
token = retbuf[0]; \
if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) \
break; \
\
if (rc == H_BUSY) \
delay = 10; \
else \
delay = get_longbusy_msecs(rc); \
\
total_delay += delay; \
if (total_delay > CXL_HCALL_TIMEOUT) { \
WARN(1, "Warning: Giving up waiting for CXL hcall " \
"%#x after %u msec\n", fn, total_delay); \
rc = H_BUSY; \
break; \
} \
msleep(delay); \
} \
}
#define CXL_H_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall, __VA_ARGS__)
#define CXL_H9_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall9, __VA_ARGS__)
#define _PRINT_MSG(rc, format, ...) \
{ \
if ((rc != H_SUCCESS) && (rc != H_CONTINUE)) \
pr_err(format, __VA_ARGS__); \
else \
pr_devel(format, __VA_ARGS__); \
} \
static char *afu_op_names[] = {
"UNKNOWN_OP", /* 0 undefined */
"RESET", /* 1 */
"SUSPEND_PROCESS", /* 2 */
"RESUME_PROCESS", /* 3 */
"READ_ERR_STATE", /* 4 */
"GET_AFU_ERR", /* 5 */
"GET_CONFIG", /* 6 */
"GET_DOWNLOAD_STATE", /* 7 */
"TERMINATE_PROCESS", /* 8 */
"COLLECT_VPD", /* 9 */
"UNKNOWN_OP", /* 10 undefined */
"GET_FUNCTION_ERR_INT", /* 11 */
"ACK_FUNCTION_ERR_INT", /* 12 */
"GET_ERROR_LOG", /* 13 */
};
static char *control_adapter_op_names[] = {
"UNKNOWN_OP", /* 0 undefined */
"RESET", /* 1 */
"COLLECT_VPD", /* 2 */
};
static char *download_op_names[] = {
"UNKNOWN_OP", /* 0 undefined */
"DOWNLOAD", /* 1 */
"VALIDATE", /* 2 */
};
static char *op_str(unsigned int op, char *name_array[], int array_len)
{
if (op >= array_len)
return "UNKNOWN_OP";
return name_array[op];
}
#define OP_STR(op, name_array) op_str(op, name_array, ARRAY_SIZE(name_array))
#define OP_STR_AFU(op) OP_STR(op, afu_op_names)
#define OP_STR_CONTROL_ADAPTER(op) OP_STR(op, control_adapter_op_names)
#define OP_STR_DOWNLOAD_ADAPTER(op) OP_STR(op, download_op_names)
long cxl_h_attach_process(u64 unit_address,
struct cxl_process_element_hcall *element,
u64 *process_token, u64 *mmio_addr, u64 *mmio_size)
{
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
long rc;
CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_ATTACH_CA_PROCESS, unit_address, virt_to_phys(element));
_PRINT_MSG(rc, "cxl_h_attach_process(%#.16llx, %#.16lx): %li\n",
unit_address, virt_to_phys(element), rc);
trace_cxl_hcall_attach(unit_address, virt_to_phys(element), retbuf[0], retbuf[1], retbuf[2], rc);
pr_devel("token: 0x%.8lx mmio_addr: 0x%lx mmio_size: 0x%lx\nProcess Element Structure:\n",
retbuf[0], retbuf[1], retbuf[2]);
cxl_dump_debug_buffer(element, sizeof(*element));
switch (rc) {
case H_SUCCESS: /* The process info is attached to the coherent platform function */
*process_token = retbuf[0];
if (mmio_addr)
*mmio_addr = retbuf[1];
if (mmio_size)
*mmio_size = retbuf[2];
return 0;
case H_PARAMETER: /* An incorrect parameter was supplied. */
case H_FUNCTION: /* The function is not supported. */
return -EINVAL;
case H_AUTHORITY: /* The partition does not have authority to perform this hcall */
case H_RESOURCE: /* The coherent platform function does not have enough additional resource to attach the process */
case H_HARDWARE: /* A hardware event prevented the attach operation */
case H_STATE: /* The coherent platform function is not in a valid state */
case H_BUSY:
return -EBUSY;
default:
WARN(1, "Unexpected return code: %lx", rc);
return -EINVAL;
}
}
/**
* cxl_h_detach_process - Detach a process element from a coherent
* platform function.
*/
long cxl_h_detach_process(u64 unit_address, u64 process_token)
{
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
long rc;
CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_DETACH_CA_PROCESS, unit_address, process_token);
_PRINT_MSG(rc, "cxl_h_detach_process(%#.16llx, 0x%.8llx): %li\n", unit_address, process_token, rc);
trace_cxl_hcall_detach(unit_address, process_token, rc);
switch (rc) {
case H_SUCCESS: /* The process was detached from the coherent platform function */
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_RESOURCE: /* The function has page table mappings for MMIO */
case H_HARDWARE: /* A hardware event prevented the detach operation */
case H_STATE: /* The coherent platform function is not in a valid state */
case H_BUSY:
return -EBUSY;
default:
WARN(1, "Unexpected return code: %lx", rc);
return -EINVAL;
}
}
/**
* cxl_h_control_function - This H_CONTROL_CA_FUNCTION hypervisor call allows
* the partition to manipulate or query
* certain coherent platform function behaviors.
*/
static long cxl_h_control_function(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_FUNCTION, unit_address, op, p1, p2, p3, p4);
_PRINT_MSG(rc, "cxl_h_control_function(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n",
unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
trace_cxl_hcall_control_function(unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
switch (rc) {
case H_SUCCESS: /* The operation is completed for the coherent platform function */
if ((op == H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT ||
op == H_CONTROL_CA_FUNCTION_READ_ERR_STATE ||
op == H_CONTROL_CA_FUNCTION_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 function is not in a valid state */
case H_BUSY:
return -EBUSY;
default:
WARN(1, "Unexpected return code: %lx", rc);
return -EINVAL;
}
}
/**
* cxl_h_reset_afu - Perform a reset to the coherent platform function.
*/
long cxl_h_reset_afu(u64 unit_address)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_RESET,
0, 0, 0, 0,
NULL);
}
/**
* cxl_h_suspend_process - Suspend a process from being executed
* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
* process was attached.
*/
long cxl_h_suspend_process(u64 unit_address, u64 process_token)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS,
process_token, 0, 0, 0,
NULL);
}
/**
* cxl_h_resume_process - Resume a process to be executed
* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
* process was attached.
*/
long cxl_h_resume_process(u64 unit_address, u64 process_token)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_RESUME_PROCESS,
process_token, 0, 0, 0,
NULL);
}
/**
* cxl_h_read_error_state - Checks the error state of the coherent
* platform function.
* R4 contains the error state
*/
long cxl_h_read_error_state(u64 unit_address, u64 *state)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_READ_ERR_STATE,
0, 0, 0, 0,
state);
}
/**
* cxl_h_get_afu_err - collect the AFU error buffer
* Parameter1 = byte offset into error buffer to retrieve, valid values
* are between 0 and (ibm,error-buffer-size - 1)
* Parameter2 = 4K aligned real address of error buffer, to be filled in
* Parameter3 = length of error buffer, valid values are 4K or less
*/
long cxl_h_get_afu_err(u64 unit_address, u64 offset,
u64 buf_address, u64 len)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_GET_AFU_ERR,
offset, buf_address, len, 0,
NULL);
}
/**
* cxl_h_get_config - collect configuration record for the
* coherent platform function
* Parameter1 = # of configuration record to retrieve, valid values are
* between 0 and (ibm,#config-records - 1)
* Parameter2 = byte offset into configuration record to retrieve,
* valid values are between 0 and (ibm,config-record-size - 1)
* Parameter3 = 4K aligned real address of configuration record buffer,
* to be filled in
* Parameter4 = length of configuration buffer, valid values are 4K or less
*/
long cxl_h_get_config(u64 unit_address, u64 cr_num, u64 offset,
u64 buf_address, u64 len)
{
return cxl_h_control_function(unit_address,
H_CONTROL_CA_FUNCTION_GET_CONFIG,
cr_num, offset, buf_address, len,
NULL);
}
/**
* cxl_h_terminate_process - Terminate the process before completion
* Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
* 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_tid:%#llx, afu_err:%#llx, errstat:%#llx\n",
info->dsisr, info->dar, info->dsr, info->reserved,
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);
}
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