diff options
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 23 | ||||
| -rw-r--r-- | drivers/misc/cxl/hcalls.c | 639 | ||||
| -rw-r--r-- | drivers/misc/cxl/hcalls.h | 203 | ||||
| -rw-r--r-- | drivers/misc/cxl/main.c | 26 | ||||
| -rw-r--r-- | drivers/misc/cxl/native.c | 1 |
5 files changed, 890 insertions, 2 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index c7ed26549565..ac655a698e41 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -688,6 +688,7 @@ void cxl_prefault(struct cxl_context *ctx, u64 wed); struct cxl *get_cxl_adapter(int num); int cxl_alloc_sst(struct cxl_context *ctx); +void cxl_dump_debug_buffer(void *addr, size_t size); void init_cxl_native(void); @@ -701,16 +702,34 @@ unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, void cxl_unmap_irq(unsigned int virq, void *cookie); int __detach_context(struct cxl_context *ctx); -/* This matches the layout of the H_COLLECT_CA_INT_INFO retbuf */ +/* + * This must match the layout of the H_COLLECT_CA_INT_INFO retbuf defined + * in PAPR. + * A word about endianness: a pointer to this structure is passed when + * calling the hcall. However, it is not a block of memory filled up by + * the hypervisor. The return values are found in registers, and copied + * one by one when returning from the hcall. See the end of the call to + * plpar_hcall9() in hvCall.S + * As a consequence: + * - we don't need to do any endianness conversion + * - the pid and tid are an exception. They are 32-bit values returned in + * the same 64-bit register. So we do need to worry about byte ordering. + */ struct cxl_irq_info { u64 dsisr; u64 dar; u64 dsr; +#ifndef CONFIG_CPU_LITTLE_ENDIAN u32 pid; u32 tid; +#else + u32 tid; + u32 pid; +#endif u64 afu_err; u64 errstat; - u64 padding[3]; /* to match the expected retbuf size for plpar_hcall9 */ + u64 proc_handle; + u64 padding[2]; /* to match the expected retbuf size for plpar_hcall9 */ }; void cxl_assign_psn_space(struct cxl_context *ctx); diff --git a/drivers/misc/cxl/hcalls.c b/drivers/misc/cxl/hcalls.c new file mode 100644 index 000000000000..7e4c517f928e --- /dev/null +++ b/drivers/misc/cxl/hcalls.c @@ -0,0 +1,639 @@ +/* + * Copyright 2015 IBM Corp. + * + * 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. + */ + + +#include <linux/compiler.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <asm/hvcall.h> +#include <asm/byteorder.h> +#include "hcalls.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); + + 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); + + 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); + + 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); + + 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]); + + 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); + + 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); + + 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); +} diff --git a/drivers/misc/cxl/hcalls.h b/drivers/misc/cxl/hcalls.h new file mode 100644 index 000000000000..6bfab323578d --- /dev/null +++ b/drivers/misc/cxl/hcalls.h @@ -0,0 +1,203 @@ +/* + * Copyright 2015 IBM Corp. + * + * 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. + */ + +#ifndef _HCALLS_H +#define _HCALLS_H + +#include <linux/types.h> +#include <asm/byteorder.h> +#include "cxl.h" + +#define SG_BUFFER_SIZE 4096 +#define SG_MAX_ENTRIES 256 + +struct sg_list { + u64 phys_addr; + u64 len; +}; + +/* + * This is straight out of PAPR, but replacing some of the compound fields with + * a single field, where they were identical to the register layout. + * + * The 'flags' parameter regroups the various bit-fields + */ +#define CXL_PE_CSRP_VALID (1ULL << 63) +#define CXL_PE_PROBLEM_STATE (1ULL << 62) +#define CXL_PE_SECONDARY_SEGMENT_TBL_SRCH (1ULL << 61) +#define CXL_PE_TAGS_ACTIVE (1ULL << 60) +#define CXL_PE_USER_STATE (1ULL << 59) +#define CXL_PE_TRANSLATION_ENABLED (1ULL << 58) +#define CXL_PE_64_BIT (1ULL << 57) +#define CXL_PE_PRIVILEGED_PROCESS (1ULL << 56) + +#define CXL_PROCESS_ELEMENT_VERSION 1 +struct cxl_process_element_hcall { + __be64 version; + __be64 flags; + u8 reserved0[12]; + __be32 pslVirtualIsn; + u8 applicationVirtualIsnBitmap[256]; + u8 reserved1[144]; + struct cxl_process_element_common common; + u8 reserved4[12]; +} __packed; + +#define H_STATE_NORMAL 1 +#define H_STATE_DISABLE 2 +#define H_STATE_TEMP_UNAVAILABLE 3 +#define H_STATE_PERM_UNAVAILABLE 4 + +/* NOTE: element must be a logical real address, and must be pinned */ +long cxl_h_attach_process(u64 unit_address, struct cxl_process_element_hcall *element, + u64 *process_token, u64 *mmio_addr, u64 *mmio_size); + +/** + * cxl_h_detach_process - Detach a process element from a coherent + * platform function. + */ +long cxl_h_detach_process(u64 unit_address, u64 process_token); + +/** + * cxl_h_reset_afu - Perform a reset to the coherent platform function. + */ +long cxl_h_reset_afu(u64 unit_address); + +/** + * 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); + +/** + * 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); + +/** + * cxl_h_read_error_state - Reads the error state of the coherent + * platform function. + * R4 contains the error state + */ +long cxl_h_read_error_state(u64 unit_address, u64 *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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * 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); + +/** + * cxl_h_reset_adapter - Perform a reset to the coherent platform facility. + */ +long cxl_h_reset_adapter(u64 unit_address); + +/** + * 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); + +/** + * 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); + +/** + * 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); +#endif /* _HCALLS_H */ diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c index a9051512198c..814257b44534 100644 --- a/drivers/misc/cxl/main.c +++ b/drivers/misc/cxl/main.c @@ -162,6 +162,32 @@ int cxl_alloc_sst(struct cxl_context *ctx) return 0; } +/* print buffer content as integers when debugging */ +void cxl_dump_debug_buffer(void *buf, size_t buf_len) +{ +#ifdef DEBUG + int i, *ptr; + + /* + * We want to regroup up to 4 integers per line, which means they + * need to be in the same pr_devel() statement + */ + ptr = (int *) buf; + for (i = 0; i * 4 < buf_len; i += 4) { + if ((i + 3) * 4 < buf_len) + pr_devel("%.8x %.8x %.8x %.8x\n", ptr[i], ptr[i + 1], + ptr[i + 2], ptr[i + 3]); + else if ((i + 2) * 4 < buf_len) + pr_devel("%.8x %.8x %.8x\n", ptr[i], ptr[i + 1], + ptr[i + 2]); + else if ((i + 1) * 4 < buf_len) + pr_devel("%.8x %.8x\n", ptr[i], ptr[i + 1]); + else + pr_devel("%.8x\n", ptr[i]); + } +#endif /* DEBUG */ +} + /* Find a CXL adapter by it's number and increase it's refcount */ struct cxl *get_cxl_adapter(int num) { diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c index b8a6ad55a5c3..7d526294112d 100644 --- a/drivers/misc/cxl/native.c +++ b/drivers/misc/cxl/native.c @@ -726,6 +726,7 @@ static int native_get_irq_info(struct cxl_afu *afu, struct cxl_irq_info *info) info->tid = pidtid & 0xffffffff; info->afu_err = cxl_p2n_read(afu, CXL_AFU_ERR_An); info->errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); + info->proc_handle = 0; return 0; } |