Date: Fri, 16 Aug 2019 20:14:37 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351137 - in head/sys: conf dev/ntb/test modules/ntb Message-ID: <201908162014.x7GKEb8L006145@repo.freebsd.org>
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Author: mav Date: Fri Aug 16 20:14:37 2019 New Revision: 351137 URL: https://svnweb.freebsd.org/changeset/base/351137 Log: NTB Tool: Test driver for NTB hardware drivers. NTB Tool driver is meant for testing NTB hardware driver functionalities, such as doorbell interrupts, link events, scratchpad registers and memory windows. This is a port of ntb_tool driver from Linux. It has been verified on top of AMD and PLX NTB HW drivers. Submitted by: Arpan Palit <arpan.palit@amd.com> Cleaned up by: mav MFC after: 2 weeks Relnotes: yes Differential Revision: https://reviews.freebsd.org/D18819 Added: head/sys/dev/ntb/test/ head/sys/dev/ntb/test/ntb_tool.c (contents, props changed) Modified: head/sys/conf/files.amd64 head/sys/conf/files.i386 head/sys/modules/ntb/Makefile Modified: head/sys/conf/files.amd64 ============================================================================== --- head/sys/conf/files.amd64 Fri Aug 16 20:09:20 2019 (r351136) +++ head/sys/conf/files.amd64 Fri Aug 16 20:14:37 2019 (r351137) @@ -225,6 +225,7 @@ dev/ntb/ntb_if.m optional ntb | ntb_transport | if_nt dev/ntb/ntb_hw/ntb_hw_amd.c optional ntb_hw_amd | ntb_hw dev/ntb/ntb_hw/ntb_hw_intel.c optional ntb_hw_intel | ntb_hw dev/ntb/ntb_hw/ntb_hw_plx.c optional ntb_hw_plx | ntb_hw +dev/ntb/test/ntb_tool.c optional ntb_tool dev/nvram/nvram.c optional nvram isa dev/random/ivy.c optional rdrand_rng !random_loadable dev/random/nehemiah.c optional padlock_rng !random_loadable Modified: head/sys/conf/files.i386 ============================================================================== --- head/sys/conf/files.i386 Fri Aug 16 20:09:20 2019 (r351136) +++ head/sys/conf/files.i386 Fri Aug 16 20:14:37 2019 (r351137) @@ -156,6 +156,7 @@ dev/ntb/ntb_if.m optional ntb | ntb_transport | if_nt dev/ntb/ntb_hw/ntb_hw_amd.c optional ntb_hw_amd | ntb_hw dev/ntb/ntb_hw/ntb_hw_intel.c optional ntb_hw_intel | ntb_hw dev/ntb/ntb_hw/ntb_hw_plx.c optional ntb_hw_plx | ntb_hw +dev/ntb/test/ntb_tool.c optional ntb_tool dev/nvram/nvram.c optional nvram isa dev/ofw/ofwpci.c optional fdt pci dev/pcf/pcf_isa.c optional pcf Added: head/sys/dev/ntb/test/ntb_tool.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/ntb/test/ntb_tool.c Fri Aug 16 20:14:37 2019 (r351137) @@ -0,0 +1,1516 @@ +/*- + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright (c) 2019 Advanced Micro Devices, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Copyright (c) 2019 Advanced Micro Devices, Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copy + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Advanced Micro Devices, Inc nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * PCIe NTB Debugging Tool FreeBSD driver + */ + +/* + * How to use this tool, by example. + * + * List of sysctl for ntb_tool driver. + * root@local# sysctl -a | grep ntb_tool + * dev.ntb_tool.0.peer0.spad7: 0x0 + * dev.ntb_tool.0.peer0.spad6: 0x0 + * dev.ntb_tool.0.peer0.spad5: 0x0 + * dev.ntb_tool.0.peer0.spad4: 0x0 + * dev.ntb_tool.0.peer0.spad3: 0x0 + * dev.ntb_tool.0.peer0.spad2: 0x0 + * dev.ntb_tool.0.peer0.spad1: 0x0 + * dev.ntb_tool.0.peer0.spad0: 0x0 + * dev.ntb_tool.0.peer0.mw_trans2: + * dev.ntb_tool.0.peer0.mw_trans1: + * dev.ntb_tool.0.peer0.mw_trans0: + * dev.ntb_tool.0.peer0.peer_mw2: + * dev.ntb_tool.0.peer0.peer_mw1: + * dev.ntb_tool.0.peer0.peer_mw0: + * dev.ntb_tool.0.peer0.mw2: + * dev.ntb_tool.0.peer0.mw1: + * dev.ntb_tool.0.peer0.mw0: + * dev.ntb_tool.0.peer0.link_event: 0x0 + * dev.ntb_tool.0.peer0.link: Y + * dev.ntb_tool.0.peer0.port: 1 + * dev.ntb_tool.0.spad7: 0x0 + * dev.ntb_tool.0.spad6: 0x0 + * dev.ntb_tool.0.spad5: 0x0 + * dev.ntb_tool.0.spad4: 0x0 + * dev.ntb_tool.0.spad3: 0x0 + * dev.ntb_tool.0.spad2: 0x0 + * dev.ntb_tool.0.spad1: 0x0 + * dev.ntb_tool.0.spad0: 0x0 + * dev.ntb_tool.0.db: 0x0 + * dev.ntb_tool.0.db_event: 0x0 + * dev.ntb_tool.0.db_mask: 0xffff + * dev.ntb_tool.0.db_valid_mask: 0xffff + * dev.ntb_tool.0.peer_db: 0x0 + * dev.ntb_tool.0.peer_db_mask: 0xffff + * dev.ntb_tool.0.link: Y + * dev.ntb_tool.0.port: 0 + * + * The above example list shows + * 1) three memory windows, + * 1) eight scratchpad registers. + * 3) doorbell config. + * 4) link config. + * 2) One peer. + * + * Based on the underlined ntb_hw driver config & connection topology, these + * things might differ. + *----------------------------------------------------------------------------- + * Eg: check local/peer port information. + * + * # Get local device port number + * root@local# sysctl dev.ntb_tool.0.port + * + * # Check peer device port number + * root@local# sysctl dev.ntb_tool.0.peer0.port + *----------------------------------------------------------------------------- + * Eg: NTB link tests + * + * # Set local link up/down + * root@local# sysctl dev.ntb_tool.0.link=Y + * root@local# sysctl dev.ntb_tool.0.link=N + * + * # Check if link with peer device is up/down: + * root@local# sysctl dev.ntb_tool.0.peer0.link + * + * # Poll until the link specified as up/down. For up, value needs to be set + * depends on peer index, i.e., for peer0 it is 0x1 and for down, value needs + * to be set as 0x0. + * root@local# sysctl dev.ntb_tool.0.peer0.link_event=0x1 + * root@local# sysctl dev.ntb_tool.0.peer0.link_event=0x0 + *----------------------------------------------------------------------------- + * Eg: Doorbell registers tests + * + * # clear/get local doorbell + * root@local# sysctl dev.ntb_tool.0.db="c 0x1" + * root@local# sysctl dev.ntb_tool.0.db + * + * # Set/clear/get local doorbell mask + * root@local# sysctl dev.ntb_tool.0.db_mask="s 0x1" + * root@local# sysctl dev.ntb_tool.0.db_mask="c 0x1" + * root@local# sysctl dev.ntb_tool.0.db_mask + * + * # Ring/clear/get peer doorbell + * root@local# sysctl dev.ntb_tool.0.peer_db="s 0x1" + * root@local# sysctl dev.ntb_tool.0.peer_db="c 0x1" + * root@local# sysctl dev.ntb_tool.0.peer_db + * + * # Set/clear/get peer doorbell mask (functionality is absent) + * root@local# sysctl dev.ntb_tool.0.peer_db_mask="s 0x1" + * root@local# sysctl dev.ntb_tool.0.peer_db_mask="c 0x1" + * root@local# sysctl dev.ntb_tool.0.peer_db_mask + * + * # Poll until local doorbell is set with the specified db bits + * root@local# dev.ntb_tool.0.db_event=0x1 + *----------------------------------------------------------------------------- + * Eg: Scratchpad registers tests + * + * # Write/read to/from local scratchpad register #0 + * root@local# sysctl dev.ntb_tool.0.spad0=0x1023457 + * root@local# sysctl dev.ntb_tool.0.spad0 + * + * # Write/read to/from peer scratchpad register #0 + * root@local# sysctl dev.ntb_tool.0.peer0.spad0=0x01020304 + * root@local# sysctl dev.ntb_tool.0.peer0.spad0 + *----------------------------------------------------------------------------- + * Eg: Memory windows tests (need to configure local mw_trans on both sides) + * + * # Create inbound memory window buffer of specified size/get its dma address + * root@local# sysctl dev.ntb_tool.0.peer0.mw_trans0=16384 + * root@local# sysctl dev.ntb_tool.0.peer0.mw_trans0 + * + * # Write/read data to/from inbound memory window with specific pattern/random + * data. + * root@local# sysctl dev.ntb_tool.0.peer0.mw0="W offset 0 nbytes 100 pattern ab" + * root@local# sysctl dev.ntb_tool.0.peer0.mw0="R offset 0 nbytes 100" + * + * # Write/read data to/from outbound memory window on the local device with + * specific pattern/random (on peer device) + * root@local# sysctl dev.ntb_tool.0.peer0.peer_mw0="W offset 0 nbytes 100 pattern ab" + * root@local# sysctl dev.ntb_tool.0.peer0.peer_mw0="R offset 0 nbytes 100" + *----------------------------------------------------------------------------- + * NOTE: *Message registers are not supported* + *----------------------------------------------------------------------------- + * + * contact information: + * Arpan Palit <arpan.palit@amd.com> + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/mbuf.h> +#include <sys/sysctl.h> +#include <sys/sbuf.h> + +#include <machine/bus.h> + +#include <vm/vm.h> + +#include "../ntb.h" + +/* Buffer length for User input */ +#define TOOL_BUF_LEN 48 +/* Memory window default command read and write offset. */ +#define DEFAULT_MW_OFF 0 +/* Memory window default size and also max command read size. */ +#define DEFAULT_MW_SIZE 1024 + +MALLOC_DEFINE(M_NTB_TOOL, "ntb_tool", "ntb_tool driver memory allocation"); + +/* + * Memory windows descriptor structure + */ +struct tool_mw { + struct tool_ctx *tc; + int widx; + int pidx; + + /* Rx buff is off virt_addr / dma_base */ + bus_addr_t dma_base; + caddr_t virt_addr; + bus_dmamap_t dma_map; + bus_dma_tag_t dma_tag; + + /* Tx buff is off vbase / phys_addr */ + caddr_t mm_base; + vm_paddr_t phys_addr; + bus_addr_t addr_limit; + size_t phys_size; + size_t xlat_align; + size_t xlat_align_size; + + /* Memory window configured size and limits */ + size_t size; + ssize_t mw_buf_size; + ssize_t mw_buf_offset; + ssize_t mw_peer_buf_size; + ssize_t mw_peer_buf_offset; + + /* options to handle sysctl out */ + int mw_cmd_rw; + int mw_peer_cmd_rw; +}; + +struct tool_spad { + int sidx; + int pidx; + struct tool_ctx *tc; +}; + +struct tool_peer { + int pidx; + struct tool_ctx *tc; + int inmw_cnt; + struct tool_mw *inmws; + int outspad_cnt; + struct tool_spad *outspads; + unsigned int port_no; +}; + +struct tool_ctx { + device_t dev; + struct callout link_event_timer; + struct callout db_event_timer; + int peer_cnt; + struct tool_peer *peers; + int inmsg_cnt; + struct tool_msg *inmsgs; + int inspad_cnt; + struct tool_spad *inspads; + unsigned int unsafe; + + /* sysctl read out variables */ + char link_status; + uint64_t link_bits; + uint64_t link_mask; + uint64_t db_valid_mask; + uint64_t db_mask_val; + uint64_t db_event_val; + uint64_t peer_db_val; + uint64_t peer_db_mask_val; + unsigned int port_no; +}; + +/* structure to save dma_addr after dma load */ +struct ntb_tool_load_cb_args { + bus_addr_t addr; + int error; +}; + +/* + * NTB events handlers + */ +static void +tool_link_event(void *ctx) +{ + struct tool_ctx *tc = ctx; + enum ntb_speed speed = 0; + enum ntb_width width = 0; + int up = 0; + + up = ntb_link_is_up(tc->dev, &speed, &width); + if (up) + tc->link_status = 'Y'; + else + tc->link_status = 'N'; + + device_printf(tc->dev, "link is %s speed %d width %d\n", + up ? "up" : "down", speed, width); +} + +static void +tool_db_event(void *ctx, uint32_t vec) +{ + struct tool_ctx *tc = ctx; + uint64_t db_bits, db_mask; + + db_mask = ntb_db_vector_mask(tc->dev, vec); + db_bits = ntb_db_read(tc->dev); + + device_printf(tc->dev, "doorbell vec %d mask %#llx bits %#llx\n", + vec, (unsigned long long)db_mask, (unsigned long long)db_bits); +} + +static const struct ntb_ctx_ops tool_ops = { + .link_event = tool_link_event, + .db_event = tool_db_event, +}; + +/* + * Callout event methods + */ +static void +tool_link_event_handler(void *arg) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg; + uint64_t val; + + val = ntb_link_is_up(tc->dev, NULL, NULL) & tc->link_mask; + + if (val == tc->link_bits) { + device_printf(tc->dev, "link_event successful for link val=" + "0x%jx\n", tc->link_bits); + tc->link_bits = 0x0; + tc->link_mask = 0x0; + } else + callout_reset(&tc->link_event_timer, 1, tool_link_event_handler, tc); +} + +static void +tool_db_event_handler(void *arg) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg; + uint64_t db_bits; + + db_bits = ntb_db_read(tc->dev); + + if (db_bits == tc->db_event_val) { + device_printf(tc->dev, "db_event successful for db val=0x%jx\n", + tc->db_event_val); + tc->db_event_val = 0x0; + } else + callout_reset(&tc->db_event_timer, 1, tool_db_event_handler, tc); +} + +/* + * Common read/write methods + */ +static inline int +get_ubuf(struct sysctl_req *req, char *ubuf) +{ + int rc; + + if (req->newlen >= TOOL_BUF_LEN) + return (EINVAL); + + rc = SYSCTL_IN(req, ubuf, req->newlen); + if (rc) + return (rc); + ubuf[req->newlen] = '\0'; + + return (0); +} + +static int +read_out(struct sysctl_req *req, uint64_t val) +{ + char ubuf[16]; + + memset((void *)ubuf, 0, sizeof(ubuf)); + snprintf(ubuf, sizeof(ubuf), "0x%jx", val); + + return SYSCTL_OUT(req, ubuf, sizeof(ubuf)); +} + +static int +tool_fn_read(struct tool_ctx *tc, struct sysctl_req *req, + uint64_t (*fn_read)(device_t ), uint64_t val) +{ + if (fn_read == NULL) + return read_out(req, val); + else if (fn_read) + return read_out(req, (uint64_t)fn_read(tc->dev)); + else + return (EINVAL); +} + +static int +tool_fn_write(struct tool_ctx *tc, struct sysctl_oid *oidp, + struct sysctl_req *req, char *ubuf, uint64_t *val, bool db_mask_sflag, + void (*fn_set)(device_t , uint64_t), void (*fn_clear)(device_t , uint64_t)) +{ + uint64_t db_valid_mask = tc->db_valid_mask; + uint64_t bits; + char cmd; + + if (fn_set == NULL && fn_clear == NULL) { + device_printf(tc->dev, "ERR: Set & Clear both are not supported\n"); + return (EINVAL); + } + + if (tc->db_valid_mask == 0) + db_valid_mask = tc->db_valid_mask = ntb_db_valid_mask(tc->dev); + + bits = 0; + sscanf(ubuf, "%c %jx", &cmd, &bits); + if (cmd == 's') { + if ((bits | db_valid_mask) > db_valid_mask) { + device_printf(tc->dev, "0x%jx value is not supported\n", bits); + return (EINVAL); + } + if (fn_set) + fn_set(tc->dev, bits); + else + return (EINVAL); + if (val) + *val |= bits; + } else if (cmd == 'c') { + if ((bits | db_valid_mask) > db_valid_mask) { + device_printf(tc->dev, "0x%jx value is not supported\n", bits); + return (EINVAL); + } + if (fn_clear) + fn_clear(tc->dev, bits); + if (val) + *val &= ~bits; + } else { + device_printf(tc->dev, "Wrong Write\n"); + return (EINVAL); + } + + return (0); +} + +static int +parse_mw_buf(char *buf, char *cmd, ssize_t *offset, ssize_t *buf_size, + uint64_t *pattern, bool *s_pflag) +{ + char op1[8], op2[8], op3[8]; + uint64_t val1, val2, val3; + bool vs1, vs2, vs3; + int rc = 0; + + vs1 = vs2 = vs3 = false; + sscanf(buf, "%c %s %jx %s %jx %s %jx", + cmd, op1, &val1, op2, &val2, op3, &val3); + + if (*cmd != 'W' && *cmd != 'R') + return (EINVAL); + + if (!strcmp(op1, "offset")) { + *offset = val1 ? val1 : DEFAULT_MW_OFF; + vs1 = true; + } else if (!strcmp(op1, "nbytes")) { + *buf_size = val1 ? val1: DEFAULT_MW_SIZE; + vs2 = true; + } else if (!strcmp(op1, "pattern")) { + *pattern = val1; + vs3 = true; + } + + if (!vs1 && !strcmp(op2, "offset")) { + *offset = val2 ? val2 : DEFAULT_MW_OFF; + vs1 = true; + } else if (!vs2 && !strcmp(op2, "nbytes")) { + *buf_size = val2 ? val2: DEFAULT_MW_SIZE; + vs2 = true; + } else if (!vs3 && !strcmp(op2, "pattern")) { + *pattern = val2; + vs3 = true; + } + + if (!vs1 && !strcmp(op3, "offset")) { + *offset = val3 ? val3 : DEFAULT_MW_OFF; + } else if (!vs2 && !strcmp(op3, "nbytes")) { + *buf_size = val3 ? val3: DEFAULT_MW_SIZE; + } else if (!vs3 && !strcmp(op3, "pattern")) { + *pattern = val3; + vs3 = true; + } + + *s_pflag = vs3; + if (vs3 && *cmd == 'R') + printf("NTB_TOOL_WARN: pattern is not supported with read " + "command\n"); + + return (rc); +} + +static int +tool_mw_read_fn(struct sysctl_req *req, struct tool_mw *inmw, char *read_addr, + int *cmd_op, ssize_t buf_off, ssize_t buf_size, char *type) +{ + ssize_t index, size; + struct sbuf *sb; + int i, loop, rc; + char *tmp; + + /* The below check is made to ignore sysctl read call. */ + if (*cmd_op == 0) + return (0); + + /* Proceeds only when command R/W is requested using sysctl. */ + index = buf_off; + tmp = read_addr; + tmp += index; + loop = ((buf_size == 0) || (buf_size > DEFAULT_MW_SIZE)) ? + DEFAULT_MW_SIZE : buf_size; + /* + * 256 bytes of extra buffer has been allocated to print details like + * summary, size, notes, i.e., excluding data part. + */ + size = loop + 256; + sb = sbuf_new_for_sysctl(NULL, NULL, size, req); + if (sb == NULL) { + rc = sb->s_error; + return (rc); + } + + if (!strcmp(type, "mw")) + sbuf_printf(sb, "\nConfigured MW size\t: %zu\n", inmw->size); + else if (!strcmp(type, "peer_mw")) + sbuf_printf(sb, "\nConfigured Peer MW size\t: %zu\n", + inmw->size); + sbuf_printf(sb, "R/W size\t\t: %zi\nR/W Offset\t\t: %zi\n\nData\n----" + "->", buf_size, buf_off); + + /* + * Data will be read based on MW size provided by the user using nbytes, + * which is limited to 1024 bytes if user req bigger size to read, check + * above loop calculation which is limiting or setting the MW read size. + * Below for loop prints data where in each line contains 32 bytes data + * and after each 8 bytes of data we used four spaces which ensures one + * data block. + */ + for (i = 0 ; i < loop; i++) { + if ((i % 32) == 0) { + sbuf_printf(sb, "\n%08zx:", index); + index += 32; + } + if ((i % 8) == 0) + sbuf_printf(sb, " "); + sbuf_printf(sb, "%02hhx", *(tmp+i)); + } + if (buf_size > DEFAULT_MW_SIZE) + sbuf_printf(sb, "\n\nNOTE: Truncating read size %zi->1024 " + "bytes\n", buf_size); + + /* cmd_op is set to zero after completion of each R/W command. */ + *cmd_op -= 1; + rc = sbuf_finish(sb); + sbuf_delete(sb); + + return (rc); +} + +static int +tool_mw_write_fn(struct sysctl_oid *oidp, struct sysctl_req *req, + struct tool_mw *inmw, char *ubuf, caddr_t write_buf, int *cmd_op, + ssize_t *buf_offset, ssize_t *buf_size) +{ + ssize_t data_buf_size; + uint64_t pattern = 0; + bool s_pflag = false; + void *data_buf; + char cmd; + int rc; + + if (!write_buf) + return (ENXIO); + + /* buf_offset and buf_size set to default in case user does not req */ + *buf_offset = DEFAULT_MW_OFF; + *buf_size = DEFAULT_MW_SIZE; + rc = parse_mw_buf(ubuf, &cmd, buf_offset, buf_size, &pattern, &s_pflag); + if (rc) { + device_printf(inmw->tc->dev, "Wrong Command \"%c\" provided\n", + cmd); + return (rc); + } + + /* Check for req size and buffer limit */ + if ((*buf_offset + *buf_size) > inmw->size) { + device_printf(inmw->tc->dev, "%s: configured mw size :%zi and " + "requested size :%zi.\n", __func__, inmw->size, + (*buf_offset + *buf_size)); + *buf_offset = DEFAULT_MW_OFF; + *buf_size = DEFAULT_MW_SIZE; + rc = EINVAL; + goto out; + } + + if (cmd == 'R') + goto read_out; + else if (cmd == 'W') + goto write; + else + goto out; + +write: + data_buf_size = *buf_size; + data_buf = malloc(data_buf_size, M_NTB_TOOL, M_WAITOK | M_ZERO); + if (!data_buf) { + rc = ENOMEM; + goto out; + } + + if (s_pflag) + memset(data_buf, pattern, data_buf_size); + else + arc4rand(data_buf, data_buf_size, 1); + + memcpy(write_buf + *buf_offset, data_buf, data_buf_size); + + free(data_buf, M_NTB_TOOL); + +read_out: + /* cmd_op value is set to two as sysctl read call executes twice */ + *cmd_op = 2; +out: + return (rc); +} + +/* + * Port sysctl read/write methods + */ +static int +sysctl_peer_port_number(SYSCTL_HANDLER_ARGS) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg1; + int rc, pidx = arg2, peer_port; + + peer_port = ntb_peer_port_number(tc->dev, pidx); + rc = sysctl_handle_int(oidp, &peer_port, 0, req); + if (rc) + device_printf(tc->dev, "Peer port sysctl set failed with err=" + "(%d).\n", rc); + else + tc->peers[pidx].port_no = peer_port; + + return (rc); +} + +static int +sysctl_local_port_number(SYSCTL_HANDLER_ARGS) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg1; + int rc, local_port; + + local_port = ntb_port_number(tc->dev); + rc = sysctl_handle_int(oidp, &local_port, 0, req); + if (rc) + device_printf(tc->dev, "Local port sysctl set failed with err=" + "(%d).\n", rc); + else + tc->port_no = local_port; + + return (rc); +} + +static int +tool_init_peers(struct tool_ctx *tc) +{ + int pidx; + + tc->peer_cnt = ntb_peer_port_count(tc->dev); + tc->peers = malloc(tc->peer_cnt * sizeof(*tc->peers), M_NTB_TOOL, + M_WAITOK | M_ZERO); + if (tc->peers == NULL) + return (ENOMEM); + for (pidx = 0; pidx < tc->peer_cnt; pidx++) { + tc->peers[pidx].pidx = pidx; + tc->peers[pidx].tc = tc; + } + + return (0); +} + +static void +tool_clear_peers(struct tool_ctx *tc) +{ + + free(tc->peers, M_NTB_TOOL); +} + +/* + * Link state sysctl read/write methods + */ +static int +sysctl_link_handle(SYSCTL_HANDLER_ARGS) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg1; + char buf[TOOL_BUF_LEN]; + int rc; + + if (req->newptr == NULL) { + snprintf(buf, 2, "%c", tc->link_status); + + return SYSCTL_OUT(req, buf, 2); + } + + rc = get_ubuf(req, buf); + if (rc) + return (rc); + + if (buf[0] == 'Y') + rc = ntb_link_enable(tc->dev, NTB_SPEED_AUTO, NTB_WIDTH_AUTO); + else if (buf[0] == 'N') + rc = ntb_link_disable(tc->dev); + else + rc = EINVAL; + + sscanf(buf, "%c", &tc->link_status); + + return (0); +} + +static int +sysctl_peer_link_handle(SYSCTL_HANDLER_ARGS) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg1; + int up = 0, pidx = arg2; + char buf[TOOL_BUF_LEN]; + + if (req->newptr) + return (0); + + up = ntb_link_is_up(tc->dev, NULL, NULL); + memset((void *)buf, 0, TOOL_BUF_LEN); + if (up & (1UL << pidx)) + buf[0] = 'Y'; + else + buf[0] = 'N'; + + return SYSCTL_OUT(req, buf, sizeof(buf)); +} + +static int +sysctl_peer_link_event_handle(SYSCTL_HANDLER_ARGS) +{ + struct tool_ctx *tc = (struct tool_ctx *)arg1; + char buf[TOOL_BUF_LEN]; + int rc, pidx = arg2; + uint64_t bits; + + if (req->newptr == NULL) + return read_out(req, tc->link_bits); + + rc = get_ubuf(req, buf); + if (rc) + return (rc); + + sscanf(buf, "0x%jx", &bits); + tc->link_bits = bits; + tc->link_mask = (1ULL << ((pidx) % 64)); + + callout_reset(&tc->link_event_timer, 1, tool_link_event_handler, tc); + return (0); +} + +/* + * Memory windows read/write/setting methods + */ +static void +ntb_tool_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) +{ + struct ntb_tool_load_cb_args *cba = (struct ntb_tool_load_cb_args *)arg; + + if (!(cba->error = error)) + cba->addr = segs[0].ds_addr; +} + +static int +sysctl_mw_handle(SYSCTL_HANDLER_ARGS) +{ + struct tool_mw *inmw = (struct tool_mw *)arg1; + char buf[TOOL_BUF_LEN]; + int rc; + + if (req->newptr == NULL) + return tool_mw_read_fn(req, inmw, (char *)inmw->mm_base, + &inmw->mw_cmd_rw, inmw->mw_buf_offset, inmw->mw_buf_size, + "mw"); + + rc = get_ubuf(req, buf); + if (!rc) + return tool_mw_write_fn(oidp, req, inmw, buf, inmw->mm_base, + &inmw->mw_cmd_rw, &inmw->mw_buf_offset, &inmw->mw_buf_size); + + return (rc); +} + +static int +tool_setup_mw(struct tool_ctx *tc, unsigned int pidx, unsigned int widx, + size_t req_size) +{ + struct tool_mw *inmw = &tc->peers[pidx].inmws[widx]; + struct ntb_tool_load_cb_args cba; + int rc; + + if (req_size == 0) + inmw->size = roundup(inmw->phys_size, inmw->xlat_align_size); + else + inmw->size = roundup(req_size, inmw->xlat_align_size); + + device_printf(tc->dev, "mw_size %zi req_size %zi buff %zi\n", + inmw->phys_size, req_size, inmw->size); + + if (bus_dma_tag_create(bus_get_dma_tag(tc->dev), inmw->xlat_align, 0, + inmw->addr_limit, BUS_SPACE_MAXADDR, NULL, NULL, inmw->size, 1, + inmw->size, 0, NULL, NULL, &inmw->dma_tag)) { + device_printf(tc->dev, "Unable to create MW tag of size " + "%zu/%zu\n", inmw->phys_size, inmw->size); + rc = ENOMEM; + goto err_free_dma_var; + } + + if (bus_dmamem_alloc(inmw->dma_tag, (void **)&inmw->virt_addr, + BUS_DMA_WAITOK | BUS_DMA_ZERO, &inmw->dma_map)) { + device_printf(tc->dev, "Unable to allocate MW buffer of size " + "%zu/%zu\n", inmw->phys_size, inmw->size); + rc = ENOMEM; + goto err_free_tag_rem; + } + + if (bus_dmamap_load(inmw->dma_tag, inmw->dma_map, inmw->virt_addr, + inmw->size, ntb_tool_load_cb, &cba, BUS_DMA_NOWAIT) || cba.error) { + device_printf(tc->dev, "Unable to load MW buffer of size " + "%zu/%zu\n", inmw->phys_size, inmw->size); + rc = ENOMEM; + goto err_free_dma; + } + inmw->dma_base = cba.addr; + + rc = ntb_mw_set_trans(tc->dev, widx, inmw->dma_base, inmw->size); + if (rc) + goto err_free_mw; + + return (0); + +err_free_mw: + bus_dmamap_unload(inmw->dma_tag, inmw->dma_map); + +err_free_dma: + bus_dmamem_free(inmw->dma_tag, inmw->virt_addr, inmw->dma_map); + +err_free_tag_rem: + bus_dma_tag_destroy(inmw->dma_tag); + +err_free_dma_var: + inmw->size = 0; + inmw->virt_addr = 0; + inmw->dma_base = 0; + inmw->dma_tag = 0; + inmw->dma_map = 0; + + return (rc); +} + +static void +tool_free_mw(struct tool_ctx *tc, int pidx, int widx) +{ + struct tool_mw *inmw = &tc->peers[pidx].inmws[widx]; + + if (inmw->dma_base) + ntb_mw_clear_trans(tc->dev, widx); + + if (inmw->virt_addr && inmw->dma_tag) { + bus_dmamap_unload(inmw->dma_tag, inmw->dma_map); + bus_dmamem_free(inmw->dma_tag, inmw->virt_addr, inmw->dma_map); + bus_dma_tag_destroy(inmw->dma_tag); + } + + inmw->virt_addr = 0; + inmw->dma_base = 0; + inmw->dma_tag = 0; + inmw->dma_map = 0; + inmw->mm_base = 0; + inmw->size = 0; +} + +static int +tool_mw_trans_read(struct tool_mw *inmw, struct sysctl_req *req) +{ + ssize_t buf_size = 512; + struct sbuf *sb; + int rc = 0; + + sb = sbuf_new_for_sysctl(NULL, NULL, buf_size, req); + if (sb == NULL) { + rc = sb->s_error; + return (rc); + } + + sbuf_printf(sb, "\nInbound MW \t%d\n", inmw->widx); + sbuf_printf(sb, "Port \t%d (%d)\n", + ntb_peer_port_number(inmw->tc->dev, inmw->pidx), inmw->pidx); + sbuf_printf(sb, "Window Address \t%p\n", inmw->mm_base); + sbuf_printf(sb, "DMA Address \t0x%016llx\n", (long long)inmw->dma_base); + sbuf_printf(sb, "Window Size \t0x%016zx[p]\n", inmw->size); + sbuf_printf(sb, "Alignment \t0x%016zx[p]\n", inmw->xlat_align); + sbuf_printf(sb, "Size Alignment \t0x%016zx[p]\n", + inmw->xlat_align_size); + sbuf_printf(sb, "Size Max \t0x%016zx[p]\n", inmw->phys_size); + + rc = sbuf_finish(sb); + sbuf_delete(sb); + + return (rc); +} + +static int +tool_mw_trans_write(struct sysctl_oid *oidp, struct sysctl_req *req, + struct tool_mw *inmw, size_t wsize) +{ + struct tool_ctx *tc = inmw->tc; + int rc = 0; + + if (wsize == 0) + return (EINVAL); + + /* No need to re-setup mw */ + if (inmw->size == wsize) + return (0); + + /* free mw dma buffer */ + if (inmw->size) + tool_free_mw(tc, inmw->pidx, inmw->widx); + + rc = tool_setup_mw(tc, inmw->pidx, inmw->widx, wsize); + + return (rc); +} + +static int +sysctl_mw_trans_handler(SYSCTL_HANDLER_ARGS) +{ + struct tool_mw *inmw = (struct tool_mw *)arg1; + char buf[TOOL_BUF_LEN]; + ssize_t wsize; + int rc; + + if (req->newptr == NULL) + return tool_mw_trans_read(inmw, req); + + rc = get_ubuf(req, buf); + if (rc == 0) { + sscanf(buf, "%zi", &wsize); + return tool_mw_trans_write(oidp, req, inmw, wsize); + } + + return (rc); +} + +static int +sysctl_peer_mw_handle(SYSCTL_HANDLER_ARGS) +{ + struct tool_mw *inmw = (struct tool_mw *)arg1; *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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