[ndctl,v3,08/11] cxl: add commands to {enable,disable,destroy}-region

Message ID	20220815192214.545800-9-vishal.l.verma@intel.com
State	Accepted
Headers	show Return-Path: <linux-cxl-owner@kernel.org> From: Vishal Verma <vishal.l.verma@intel.com> To: <linux-cxl@vger.kernel.org> Cc: <nvdimm@lists.linux.dev>, Dan Williams <dan.j.williams@intel.com>, Alison Schofield <alison.schofield@intel.com>, Ira Weiny <ira.weiny@intel.com>, Dave Jiang <dave.jiang@intel.com>, Vishal Verma <vishal.l.verma@intel.com> Subject: [ndctl PATCH v3 08/11] cxl: add commands to {enable,disable,destroy}-region Date: Mon, 15 Aug 2022 13:22:11 -0600 Message-Id: <20220815192214.545800-9-vishal.l.verma@intel.com> In-Reply-To: <20220815192214.545800-1-vishal.l.verma@intel.com> References: <20220815192214.545800-1-vishal.l.verma@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	cxl: add region management \| expand [ndctl,v3,00/11] cxl: add region management [ndctl,v3,01/11] libcxl: add a depth attribute to cxl_port [ndctl,v3,02/11] cxl/port: Consolidate the debug option in cxl-port man pages [ndctl,v3,03/11] cxl/memdev: refactor decoder mode string parsing [ndctl,v3,04/11] libcxl: Introduce libcxl region and mapping objects [ndctl,v3,05/11] cxl-cli: add region listing support [ndctl,v3,06/11] libcxl: add low level APIs for region creation [ndctl,v3,07/11] cxl: add a 'create-region' command [ndctl,v3,08/11] cxl: add commands to {enable,disable,destroy}-region [ndctl,v3,09/11] cxl/list: make memdevs and regions the default listing [ndctl,v3,10/11] test: add a cxl-create-region test [ndctl,v3,11/11] cxl/decoder: add a max_available_extent attribute

diff --git a/Documentation/cxl/cxl-destroy-region.txt b/Documentation/cxl/cxl-destroy-region.txt new file mode 100644 index 0000000..74f4093 --- /dev/null +++ b/Documentation/cxl/cxl-destroy-region.txt @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 + +cxl-destroy-region(1) +===================== + +NAME +---- +cxl-destroy-region - destroy specified region(s). + +SYNOPSIS +-------- +[verse] +'cxl destroy-region <region> [<options>]' + +include::region-description.txt[] + +EXAMPLE +------- +---- +# cxl destroy-region all +destroyed 2 regions +---- + +OPTIONS +------- +include::bus-option.txt[] + +-f:: +--force:: + Force a destroy operation even if the region is active. + This will attempt to disable the region first. + +include::decoder-option.txt[] + +include::debug-option.txt[] + +include::../copyright.txt[] + +SEE ALSO +-------- +linkcxl:cxl-list[1], linkcxl:cxl-create-region[1] diff --git a/Documentation/cxl/cxl-disable-region.txt b/Documentation/cxl/cxl-disable-region.txt new file mode 100644 index 0000000..6a39aee --- /dev/null +++ b/Documentation/cxl/cxl-disable-region.txt @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 + +cxl-disable-region(1) +===================== + +NAME +---- +cxl-disable-region - disable specified region(s). + +SYNOPSIS +-------- +[verse] +'cxl disable-region <region> [<options>]' + +include::region-description.txt[] + +EXAMPLE +------- +---- +# cxl disable-region all +disabled 2 regions +---- + +OPTIONS +------- +include::bus-option.txt[] + +include::decoder-option.txt[] + +include::debug-option.txt[] + +include::../copyright.txt[] + +SEE ALSO +-------- +linkcxl:cxl-list[1], linkcxl:cxl-enable-region[1] diff --git a/Documentation/cxl/cxl-enable-region.txt b/Documentation/cxl/cxl-enable-region.txt new file mode 100644 index 0000000..f6ef00f --- /dev/null +++ b/Documentation/cxl/cxl-enable-region.txt @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 + +cxl-enable-region(1) +===================== + +NAME +---- +cxl-enable-region - enable specified region(s). + +SYNOPSIS +-------- +[verse] +'cxl enable-region <region> [<options>]' + +include::region-description.txt[] + +EXAMPLE +------- +---- +# cxl enable-region all +enabled 2 regions +---- + +OPTIONS +------- +include::bus-option.txt[] + +include::decoder-option.txt[] + +include::debug-option.txt[] + +include::../copyright.txt[] + +SEE ALSO +-------- +linkcxl:cxl-list[1], linkcxl:cxl-disable-region[1] diff --git a/Documentation/cxl/decoder-option.txt b/Documentation/cxl/decoder-option.txt new file mode 100644 index 0000000..e638d6e --- /dev/null +++ b/Documentation/cxl/decoder-option.txt @@ -0,0 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 + +-d:: +--decoder=:: + The root decoder to limit the operation to. Only regions that are + children of the specified decoder will be acted upon. diff --git a/cxl/builtin.h b/cxl/builtin.h index 843bada..b28c221 100644 --- a/cxl/builtin.h +++ b/cxl/builtin.h @@ -19,4 +19,7 @@ int cmd_enable_port(int argc, const char **argv, struct cxl_ctx *ctx); int cmd_set_partition(int argc, const char **argv, struct cxl_ctx *ctx); int cmd_disable_bus(int argc, const char **argv, struct cxl_ctx *ctx); int cmd_create_region(int argc, const char **argv, struct cxl_ctx *ctx); +int cmd_enable_region(int argc, const char **argv, struct cxl_ctx *ctx); +int cmd_disable_region(int argc, const char **argv, struct cxl_ctx *ctx); +int cmd_destroy_region(int argc, const char **argv, struct cxl_ctx *ctx); #endif /* _CXL_BUILTIN_H_ */ diff --git a/cxl/cxl.c b/cxl/cxl.c index f0afcfe..dd1be7a 100644 --- a/cxl/cxl.c +++ b/cxl/cxl.c @@ -73,6 +73,9 @@ static struct cmd_struct commands[] = { { "set-partition", .c_fn = cmd_set_partition }, { "disable-bus", .c_fn = cmd_disable_bus }, { "create-region", .c_fn = cmd_create_region }, + { "enable-region", .c_fn = cmd_enable_region }, + { "disable-region", .c_fn = cmd_disable_region }, + { "destroy-region", .c_fn = cmd_destroy_region }, }; int main(int argc, const char **argv) diff --git a/cxl/region.c b/cxl/region.c index 2791ac9..b22d3c8 100644 --- a/cxl/region.c +++ b/cxl/region.c @@ -45,6 +45,9 @@ struct parsed_params { enum region_actions { ACTION_CREATE, + ACTION_ENABLE, + ACTION_DISABLE, + ACTION_DESTROY, }; static struct log_ctx rl; @@ -78,7 +81,22 @@ static const struct option create_options[] = { OPT_END(), }; +static const struct option enable_options[] = { + BASE_OPTIONS(), + OPT_END(), +}; +static const struct option disable_options[] = { + BASE_OPTIONS(), + OPT_END(), +}; + +static const struct option destroy_options[] = { + BASE_OPTIONS(), + OPT_BOOLEAN('f', "force", &param.force, + "destroy region even if currently active"), + OPT_END(), +}; static int parse_create_options(int argc, const char **argv, struct parsed_params *p) @@ -519,12 +537,122 @@ err_delete: return rc; } +static int destroy_region(struct cxl_region *region) +{ + const char *devname = cxl_region_get_devname(region); + unsigned int ways, i; + int rc; + + /* First, unbind/disable the region if needed */ + if (cxl_region_is_enabled(region)) { + if (param.force) { + rc = cxl_region_disable(region); + if (rc) { + log_err(&rl, "%s: error disabling region: %s\n", + devname, strerror(-rc)); + return rc; + } + } else { + log_err(&rl, "%s active. Disable it or use --force\n", + devname); + return -EBUSY; + } + } + + /* Reset the region decode in preparation for removal */ + rc = cxl_region_decode_reset(region); + if (rc) { + log_err(&rl, "%s: failed to reset decode: %s\n", devname, + strerror(-rc)); + return rc; + } + + /* Reset all endpoint decoders and region targets */ + ways = cxl_region_get_interleave_ways(region); + if (ways == 0 || ways == UINT_MAX) { + log_err(&rl, "%s: error getting interleave ways\n", devname); + return -ENXIO; + } + + for (i = 0; i < ways; i++) { + struct cxl_decoder *ep_decoder; + + ep_decoder = cxl_region_get_target_decoder(region, i); + if (!ep_decoder) + return -ENXIO; + + rc = cxl_region_clear_target(region, i); + if (rc) { + log_err(&rl, "%s: clearing target%d failed: %s\n", + devname, i, strerror(abs(rc))); + return rc; + } + + rc = cxl_decoder_set_dpa_size(ep_decoder, 0); + if (rc) { + log_err(&rl, "%s: set_dpa_size failed: %s\n", + cxl_decoder_get_devname(ep_decoder), + strerror(abs(rc))); + return rc; + } + } + + /* Finally, delete the region */ + return cxl_region_delete(region); +} + +static int do_region_xable(struct cxl_region *region, enum region_actions action) +{ + switch (action) { + case ACTION_ENABLE: + return cxl_region_enable(region); + case ACTION_DISABLE: + return cxl_region_disable(region); + case ACTION_DESTROY: + return destroy_region(region); + default: + return -EINVAL; + } +} + +static int decoder_region_action(struct parsed_params *p, + struct cxl_decoder *decoder, + enum region_actions action, int *count) +{ + struct cxl_region *region, *_r; + int rc = 0, err_rc = 0; + + cxl_region_foreach_safe (decoder, region, _r) { + int i, match = 0; + + for (i = 0; i < p->num_targets; i++) { + if (util_cxl_region_filter(region, p->targets[i])) { + match = 1; + break; + } + } + if (!match) + continue; + + rc = do_region_xable(region, action); + if (rc == 0) { + *count += 1; + } else { + log_err(&rl, "%s: failed: %s\n", + cxl_region_get_devname(region), strerror(-rc)); + err_rc = rc; + } + } + return err_rc ? err_rc : rc; +} + static int region_action(int argc, const char **argv, struct cxl_ctx *ctx, enum region_actions action, const struct option *options, struct parsed_params *p, int *count, const char *u) { - int rc = -ENXIO; + int rc = 0, err_rc = 0; + struct cxl_bus *bus; log_init(&rl, "cxl region", "CXL_REGION_LOG"); rc = parse_region_options(argc, argv, ctx, action, options, p, u); @@ -534,6 +662,33 @@ static int region_action(int argc, const char **argv, struct cxl_ctx *ctx, if (action == ACTION_CREATE) return create_region(ctx, count, p); + cxl_bus_foreach(ctx, bus) { + struct cxl_decoder *decoder; + struct cxl_port *port; + + if (!util_cxl_bus_filter(bus, param.bus)) + continue; + + port = cxl_bus_get_port(bus); + if (!cxl_port_is_root(port)) + continue; + + cxl_decoder_foreach (port, decoder) { + decoder = util_cxl_decoder_filter(decoder, + param.root_decoder); + if (!decoder) + continue; + rc = decoder_region_action(p, decoder, action, count); + if (rc) + err_rc = rc; + } + } + + if (err_rc) { + log_err(&rl, "one or more failures, last failure: %s\n", + strerror(-err_rc)); + return err_rc; + } return rc; } @@ -548,3 +703,39 @@ int cmd_create_region(int argc, const char **argv, struct cxl_ctx *ctx) log_info(&rl, "created %d region%s\n", count, count == 1 ? "" : "s"); return rc == 0 ? 0 : EXIT_FAILURE; } + +int cmd_enable_region(int argc, const char **argv, struct cxl_ctx *ctx) +{ + const char *u = "cxl enable-region <region0> ... [<options>]"; + struct parsed_params p = { 0 }; + int rc, count = 0; + + rc = region_action(argc, argv, ctx, ACTION_ENABLE, enable_options, &p, + &count, u); + log_info(&rl, "enabled %d region%s\n", count, count == 1 ? "" : "s"); + return rc == 0 ? 0 : EXIT_FAILURE; +} + +int cmd_disable_region(int argc, const char **argv, struct cxl_ctx *ctx) +{ + const char *u = "cxl disable-region <region0> ... [<options>]"; + struct parsed_params p = { 0 }; + int rc, count = 0; + + rc = region_action(argc, argv, ctx, ACTION_DISABLE, disable_options, &p, + &count, u); + log_info(&rl, "disabled %d region%s\n", count, count == 1 ? "" : "s"); + return rc == 0 ? 0 : EXIT_FAILURE; +} + +int cmd_destroy_region(int argc, const char **argv, struct cxl_ctx *ctx) +{ + const char *u = "cxl destroy-region <region0> ... [<options>]"; + struct parsed_params p = { 0 }; + int rc, count = 0; + + rc = region_action(argc, argv, ctx, ACTION_DESTROY, destroy_options, &p, + &count, u); + log_info(&rl, "destroyed %d region%s\n", count, count == 1 ? "" : "s"); + return rc == 0 ? 0 : EXIT_FAILURE; +} diff --git a/Documentation/cxl/meson.build b/Documentation/cxl/meson.build index 340cdee..147ea71 100644 --- a/Documentation/cxl/meson.build +++ b/Documentation/cxl/meson.build @@ -24,6 +24,7 @@ filedeps = [ 'labels-options.txt', 'debug-option.txt', 'region-description.txt', + 'decoder-option.txt', ] cxl_manpages = [ @@ -41,6 +42,9 @@ cxl_manpages = [ 'cxl-reserve-dpa.txt', 'cxl-free-dpa.txt', 'cxl-create-region.txt', + 'cxl-disable-region.txt', + 'cxl-enable-region.txt', + 'cxl-destroy-region.txt', ] foreach man : cxl_manpages

[ndctl,v3,08/11] cxl: add commands to {enable,disable,destroy}-region

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