From: Christophe Lombard <clomb...@linux.vnet.ibm.com>
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 <fbar...@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbar...@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clomb...@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <ma...@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imun...@au1.ibm.com>
---
drivers/misc/cxl/cxl.h | 23 +-
drivers/misc/cxl/hcalls.c | 639 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/misc/cxl/hcalls.h | 203 +++++++++++++++
drivers/misc/cxl/main.c | 26 ++
drivers/misc/cxl/native.c | 1 +
5 files changed, 890 insertions(+), 2 deletions(-)
create mode 100644 drivers/misc/cxl/hcalls.c
create mode 100644 drivers/misc/cxl/hcalls.h
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index c7ed265..ac655a6 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 0000000..7e4c517
--- /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 0000000..6bfab32
--- /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 a9051512..814257b 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 b8a6ad5..7d52629 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;
}
--
1.9.1
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