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cxl: New hcalls to support cxl adapters
The hypervisor calls provide an interface with a coherent platform facility and function. It matches version 0.16 of the 'PAPR changes' document. The following hcalls are supported: H_ATTACH_CA_PROCESS Attach a process element to a coherent platform function. H_DETACH_CA_PROCESS Detach a process element from a coherent platform function. H_CONTROL_CA_FUNCTION Allow the partition to manipulate or query certain coherent platform function behaviors. H_COLLECT_CA_INT_INFO Collect interrupt info about a coherent. platform function after an interrupt occurred H_CONTROL_CA_FAULTS Control the operation of a coherent platform function after a fault occurs. H_DOWNLOAD_CA_FACILITY Support for downloading a base adapter image to the coherent platform facility, and for validating the entire image after the download. H_CONTROL_CA_FACILITY Allow the partition to manipulate or query certain coherent platform facility behaviors. Co-authored-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com> Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
parent
c0efa9aee8
commit
444c4ba461
5 changed files with 890 additions and 2 deletions
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@ -688,6 +688,7 @@ void cxl_prefault(struct cxl_context *ctx, u64 wed);
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struct cxl *get_cxl_adapter(int num);
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int cxl_alloc_sst(struct cxl_context *ctx);
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void cxl_dump_debug_buffer(void *addr, size_t size);
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void init_cxl_native(void);
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@ -701,16 +702,34 @@ unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq,
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void cxl_unmap_irq(unsigned int virq, void *cookie);
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int __detach_context(struct cxl_context *ctx);
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/* This matches the layout of the H_COLLECT_CA_INT_INFO retbuf */
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/*
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* This must match the layout of the H_COLLECT_CA_INT_INFO retbuf defined
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* in PAPR.
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* A word about endianness: a pointer to this structure is passed when
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* calling the hcall. However, it is not a block of memory filled up by
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* the hypervisor. The return values are found in registers, and copied
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* one by one when returning from the hcall. See the end of the call to
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* plpar_hcall9() in hvCall.S
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* As a consequence:
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* - we don't need to do any endianness conversion
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* - the pid and tid are an exception. They are 32-bit values returned in
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* the same 64-bit register. So we do need to worry about byte ordering.
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*/
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struct cxl_irq_info {
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u64 dsisr;
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u64 dar;
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u64 dsr;
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#ifndef CONFIG_CPU_LITTLE_ENDIAN
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u32 pid;
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u32 tid;
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#else
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u32 tid;
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u32 pid;
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#endif
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u64 afu_err;
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u64 errstat;
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u64 padding[3]; /* to match the expected retbuf size for plpar_hcall9 */
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u64 proc_handle;
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u64 padding[2]; /* to match the expected retbuf size for plpar_hcall9 */
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};
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void cxl_assign_psn_space(struct cxl_context *ctx);
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639
drivers/misc/cxl/hcalls.c
Normal file
639
drivers/misc/cxl/hcalls.c
Normal file
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@ -0,0 +1,639 @@
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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/hvcall.h>
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#include <asm/byteorder.h>
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#include "hcalls.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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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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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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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.
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*/
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long cxl_h_terminate_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_TERMINATE_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_collect_vpd - Collect VPD for the coherent platform function.
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* Parameter1 = # of VPD record to retrieve, valid values are between 0
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* and (ibm,#config-records - 1).
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* Parameter2 = 4K naturally aligned real buffer containing block
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* list entries
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* Parameter3 = number of block list entries in the block list, valid
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* values are between 0 and 256
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*/
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long cxl_h_collect_vpd(u64 unit_address, u64 record, u64 list_address,
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u64 num, u64 *out)
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{
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return cxl_h_control_function(unit_address,
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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);
|
||||
}
|
203
drivers/misc/cxl/hcalls.h
Normal file
203
drivers/misc/cxl/hcalls.h
Normal file
|
@ -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 */
|
|
@ -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)
|
||||
{
|
||||
|
|
|
@ -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;
|
||||
}
|
||||
|
|
Loading…
Add table
Reference in a new issue