From patchwork Mon Jul 17 17:16:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13316032 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CD80EB64DC for ; Mon, 17 Jul 2023 17:18:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230290AbjGQRSU (ORCPT ); Mon, 17 Jul 2023 13:18:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230283AbjGQRST (ORCPT ); Mon, 17 Jul 2023 13:18:19 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2466AB5 for ; Mon, 17 Jul 2023 10:18:18 -0700 (PDT) Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4R4TGr5qxfz67k9Y; Tue, 18 Jul 2023 01:15:00 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Mon, 17 Jul 2023 18:18:15 +0100 From: Jonathan Cameron To: , Dan Williams , CC: , Alison Schofield , Ira Weiny , Dave Jiang , Davidlohr Bueso , Viacheslav Dubeyko , Shesha Bhushan Sreenivasamurthy , Fan Ni , Michael Tsirkin , Jonathan Zhang , Klaus Jensen Subject: [RFC PATCH 03/17] cxl/mbox: Pull the payload out of struct cxl_cmd and make instances constant Date: Mon, 17 Jul 2023 18:16:32 +0100 Message-ID: <20230717171646.8972-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230717171646.8972-1-Jonathan.Cameron@huawei.com> References: <20230717171646.8972-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Putting the pointer in the structure for command handling puts a single variable element inside an otherwise constant structure. Move it out as a directly passed variable and take the cxl_cmd structures constant. Signed-off-by: Jonathan Cameron --- include/hw/cxl/cxl_device.h | 6 +- hw/cxl/cxl-mailbox-utils.c | 106 +++++++++++++++++++++--------------- 2 files changed, 65 insertions(+), 47 deletions(-) diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h index 2c239fca47..f84f6813aa 100644 --- a/include/hw/cxl/cxl_device.h +++ b/include/hw/cxl/cxl_device.h @@ -135,14 +135,14 @@ typedef enum { } CXLRetCode; struct cxl_cmd; -typedef CXLRetCode (*opcode_handler)(struct cxl_cmd *cmd, +typedef CXLRetCode (*opcode_handler)(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len); struct cxl_cmd { const char *name; opcode_handler handler; ssize_t in; uint16_t effect; /* Reported in CEL */ - uint8_t *payload; }; typedef struct CXLEvent { @@ -213,7 +213,7 @@ typedef struct cxl_device_state { uint64_t pmem_size; uint64_t vmem_size; - struct cxl_cmd (*cxl_cmd_set)[256]; + const struct cxl_cmd (*cxl_cmd_set)[256]; CPMUState cpmu[CXL_NUM_CPMU_INSTANCES]; CXLEventLog event_logs[CXL_EVENT_TYPE_MAX]; } CXLDeviceState; diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index c8feeffbeb..f0d94b9ae4 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -71,7 +71,8 @@ enum { }; -static CXLRetCode cmd_events_get_records(struct cxl_cmd *cmd, +static CXLRetCode cmd_events_get_records(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxlds, uint16_t *len) { @@ -83,9 +84,9 @@ static CXLRetCode cmd_events_get_records(struct cxl_cmd *cmd, return CXL_MBOX_INVALID_INPUT; } - log_type = *((uint8_t *)cmd->payload); + log_type = payload[0]; - pl = (CXLGetEventPayload *)cmd->payload; + pl = (CXLGetEventPayload *)payload; memset(pl, 0, sizeof(*pl)); max_recs = (cxlds->payload_size - CXL_EVENT_PAYLOAD_HDR_SIZE) / @@ -97,25 +98,27 @@ static CXLRetCode cmd_events_get_records(struct cxl_cmd *cmd, return cxl_event_get_records(cxlds, pl, log_type, max_recs, len); } -static CXLRetCode cmd_events_clear_records(struct cxl_cmd *cmd, +static CXLRetCode cmd_events_clear_records(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxlds, uint16_t *len) { CXLClearEventPayload *pl; - pl = (CXLClearEventPayload *)cmd->payload; + pl = (CXLClearEventPayload *)payload; *len = 0; return cxl_event_clear_records(cxlds, pl); } -static CXLRetCode cmd_events_get_interrupt_policy(struct cxl_cmd *cmd, +static CXLRetCode cmd_events_get_interrupt_policy(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxlds, uint16_t *len) { CXLEventInterruptPolicy *policy; CXLEventLog *log; - policy = (CXLEventInterruptPolicy *)cmd->payload; + policy = (CXLEventInterruptPolicy *)payload; memset(policy, 0, sizeof(*policy)); log = &cxlds->event_logs[CXL_EVENT_TYPE_INFO]; @@ -148,7 +151,8 @@ static CXLRetCode cmd_events_get_interrupt_policy(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_events_set_interrupt_policy(struct cxl_cmd *cmd, +static CXLRetCode cmd_events_set_interrupt_policy(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxlds, uint16_t *len) { @@ -159,7 +163,7 @@ static CXLRetCode cmd_events_set_interrupt_policy(struct cxl_cmd *cmd, return CXL_MBOX_INVALID_PAYLOAD_LENGTH; } - policy = (CXLEventInterruptPolicy *)cmd->payload; + policy = (CXLEventInterruptPolicy *)payload; log = &cxlds->event_logs[CXL_EVENT_TYPE_INFO]; log->irq_enabled = (policy->info_settings & CXL_EVENT_INT_MODE_MASK) == @@ -191,7 +195,8 @@ static CXLRetCode cmd_events_set_interrupt_policy(struct cxl_cmd *cmd, } /* 8.2.9.2.1 */ -static CXLRetCode cmd_firmware_update_get_info(struct cxl_cmd *cmd, +static CXLRetCode cmd_firmware_update_get_info(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -212,7 +217,7 @@ static CXLRetCode cmd_firmware_update_get_info(struct cxl_cmd *cmd, return CXL_MBOX_INTERNAL_ERROR; } - fw_info = (void *)cmd->payload; + fw_info = (void *)payload; memset(fw_info, 0, sizeof(*fw_info)); fw_info->slots_supported = 2; @@ -225,27 +230,29 @@ static CXLRetCode cmd_firmware_update_get_info(struct cxl_cmd *cmd, } /* 8.2.9.3.1 */ -static CXLRetCode cmd_timestamp_get(struct cxl_cmd *cmd, +static CXLRetCode cmd_timestamp_get(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { uint64_t final_time = cxl_device_get_timestamp(cxl_dstate); - stq_le_p(cmd->payload, final_time); + stq_le_p(payload, final_time); *len = 8; return CXL_MBOX_SUCCESS; } /* 8.2.9.3.2 */ -static CXLRetCode cmd_timestamp_set(struct cxl_cmd *cmd, - CXLDeviceState *cxl_dstate, - uint16_t *len) +static CXLRetCode cmd_timestamp_set(const struct cxl_cmd *cmd, + uint8_t *payload, + CXLDeviceState *cxl_dstate, + uint16_t *len) { cxl_dstate->timestamp.set = true; cxl_dstate->timestamp.last_set = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - cxl_dstate->timestamp.host_set = le64_to_cpu(*(uint64_t *)cmd->payload); + cxl_dstate->timestamp.host_set = le64_to_cpu(*(uint64_t *)payload); *len = 0; return CXL_MBOX_SUCCESS; @@ -258,7 +265,8 @@ static const QemuUUID cel_uuid = { }; /* 8.2.9.4.1 */ -static CXLRetCode cmd_logs_get_supported(struct cxl_cmd *cmd, +static CXLRetCode cmd_logs_get_supported(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -269,7 +277,7 @@ static CXLRetCode cmd_logs_get_supported(struct cxl_cmd *cmd, QemuUUID uuid; uint32_t size; } log_entries[1]; - } QEMU_PACKED *supported_logs = (void *)cmd->payload; + } QEMU_PACKED *supported_logs = (void *)payload; QEMU_BUILD_BUG_ON(sizeof(*supported_logs) != 0x1c); supported_logs->entries = 1; @@ -281,7 +289,8 @@ static CXLRetCode cmd_logs_get_supported(struct cxl_cmd *cmd, } /* 8.2.9.4.2 */ -static CXLRetCode cmd_logs_get_log(struct cxl_cmd *cmd, +static CXLRetCode cmd_logs_get_log(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -289,7 +298,9 @@ static CXLRetCode cmd_logs_get_log(struct cxl_cmd *cmd, QemuUUID uuid; uint32_t offset; uint32_t length; - } QEMU_PACKED QEMU_ALIGNED(16) *get_log = (void *)cmd->payload; + } QEMU_PACKED QEMU_ALIGNED(16) *get_log; + + get_log = (void *)payload; /* * 8.2.9.4.2 @@ -315,14 +326,15 @@ static CXLRetCode cmd_logs_get_log(struct cxl_cmd *cmd, /* Store off everything to local variables so we can wipe out the payload */ *len = get_log->length; - memmove(cmd->payload, cxl_dstate->cel_log + get_log->offset, + memmove(payload, cxl_dstate->cel_log + get_log->offset, get_log->length); return CXL_MBOX_SUCCESS; } /* 8.2.9.5.1.1 */ -static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, +static CXLRetCode cmd_identify_memory_device(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -352,7 +364,7 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, return CXL_MBOX_INTERNAL_ERROR; } - id = (void *)cmd->payload; + id = (void *)payload; memset(id, 0, sizeof(*id)); snprintf(id->fw_revision, 0x10, "BWFW VERSION %02d", 0); @@ -370,7 +382,8 @@ static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_ccls_get_partition_info(struct cxl_cmd *cmd, +static CXLRetCode cmd_ccls_get_partition_info(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -379,7 +392,7 @@ static CXLRetCode cmd_ccls_get_partition_info(struct cxl_cmd *cmd, uint64_t active_pmem; uint64_t next_vmem; uint64_t next_pmem; - } QEMU_PACKED *part_info = (void *)cmd->payload; + } QEMU_PACKED *part_info = (void *)payload; QEMU_BUILD_BUG_ON(sizeof(*part_info) != 0x20); if ((!QEMU_IS_ALIGNED(cxl_dstate->vmem_size, CXL_CAPACITY_MULTIPLIER)) || @@ -400,7 +413,8 @@ static CXLRetCode cmd_ccls_get_partition_info(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_ccls_get_lsa(struct cxl_cmd *cmd, +static CXLRetCode cmd_ccls_get_lsa(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -412,7 +426,7 @@ static CXLRetCode cmd_ccls_get_lsa(struct cxl_cmd *cmd, CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d); uint32_t offset, length; - get_lsa = (void *)cmd->payload; + get_lsa = (void *)payload; offset = get_lsa->offset; length = get_lsa->length; @@ -425,7 +439,8 @@ static CXLRetCode cmd_ccls_get_lsa(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_ccls_set_lsa(struct cxl_cmd *cmd, +static CXLRetCode cmd_ccls_set_lsa(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -434,7 +449,7 @@ static CXLRetCode cmd_ccls_set_lsa(struct cxl_cmd *cmd, uint32_t rsvd; uint8_t data[]; } QEMU_PACKED; - struct set_lsa_pl *set_lsa_payload = (void *)cmd->payload; + struct set_lsa_pl *set_lsa_payload = (void *)payload; CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d); const size_t hdr_len = offsetof(struct set_lsa_pl, data); @@ -460,7 +475,8 @@ static CXLRetCode cmd_ccls_set_lsa(struct cxl_cmd *cmd, * make this stateful. We may want to allow longer poison lists to aid * testing that kernel functionality. */ -static CXLRetCode cmd_media_get_poison_list(struct cxl_cmd *cmd, +static CXLRetCode cmd_media_get_poison_list(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len) { @@ -482,8 +498,8 @@ static CXLRetCode cmd_media_get_poison_list(struct cxl_cmd *cmd, } QEMU_PACKED records[]; } QEMU_PACKED; - struct get_poison_list_pl *in = (void *)cmd->payload; - struct get_poison_list_out_pl *out = (void *)cmd->payload; + struct get_poison_list_pl *in = (void *)payload; + struct get_poison_list_out_pl *out = (void *)payload; CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate); uint16_t record_count = 0, i = 0; uint64_t query_start, query_length; @@ -536,7 +552,8 @@ static CXLRetCode cmd_media_get_poison_list(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_media_inject_poison(struct cxl_cmd *cmd, +static CXLRetCode cmd_media_inject_poison(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len_unused) { @@ -546,7 +563,7 @@ static CXLRetCode cmd_media_inject_poison(struct cxl_cmd *cmd, struct inject_poison_pl { uint64_t dpa; }; - struct inject_poison_pl *in = (void *)cmd->payload; + struct inject_poison_pl *in = (void *)payload; uint64_t dpa = ldq_le_p(&in->dpa); CXLPoison *p; @@ -575,7 +592,8 @@ static CXLRetCode cmd_media_inject_poison(struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } -static CXLRetCode cmd_media_clear_poison(struct cxl_cmd *cmd, +static CXLRetCode cmd_media_clear_poison(const struct cxl_cmd *cmd, + uint8_t *payload, CXLDeviceState *cxl_dstate, uint16_t *len_unused) { @@ -589,7 +607,7 @@ static CXLRetCode cmd_media_clear_poison(struct cxl_cmd *cmd, CXLPoison *ent; uint64_t dpa; - struct clear_poison_pl *in = (void *)cmd->payload; + struct clear_poison_pl *in = (void *)payload; dpa = ldq_le_p(&in->dpa); if (dpa + CXL_CACHE_LINE_SIZE > cxl_dstate->mem_size) { @@ -659,7 +677,7 @@ static CXLRetCode cmd_media_clear_poison(struct cxl_cmd *cmd, #define IMMEDIATE_POLICY_CHANGE (1 << 3) #define IMMEDIATE_LOG_CHANGE (1 << 4) -static struct cxl_cmd cxl_cmd_set[256][256] = { +static const struct cxl_cmd cxl_cmd_set[256][256] = { [EVENTS][GET_RECORDS] = { "EVENTS_GET_RECORDS", cmd_events_get_records, 1, 0 }, [EVENTS][CLEAR_RECORDS] = { "EVENTS_CLEAR_RECORDS", @@ -693,21 +711,21 @@ static struct cxl_cmd cxl_cmd_set[256][256] = { void cxl_process_mailbox(CXLDeviceState *cxl_dstate) { uint16_t ret = CXL_MBOX_SUCCESS; - struct cxl_cmd *cxl_cmd; - uint64_t status_reg; + const struct cxl_cmd *cxl_cmd; + uint64_t status_reg = 0; opcode_handler h; uint64_t command_reg = cxl_dstate->mbox_reg_state64[R_CXL_DEV_MAILBOX_CMD]; uint8_t set = FIELD_EX64(command_reg, CXL_DEV_MAILBOX_CMD, COMMAND_SET); uint8_t cmd = FIELD_EX64(command_reg, CXL_DEV_MAILBOX_CMD, COMMAND); uint16_t len = FIELD_EX64(command_reg, CXL_DEV_MAILBOX_CMD, LENGTH); + uint8_t *pl = cxl_dstate->mbox_reg_state + A_CXL_DEV_CMD_PAYLOAD; + cxl_cmd = &cxl_dstate->cxl_cmd_set[set][cmd]; h = cxl_cmd->handler; if (h) { if (len == cxl_cmd->in || cxl_cmd->in == ~0) { - cxl_cmd->payload = cxl_dstate->mbox_reg_state + - A_CXL_DEV_CMD_PAYLOAD; - ret = (*h)(cxl_cmd, cxl_dstate, &len); + ret = (*h)(cxl_cmd, pl, cxl_dstate, &len); assert(len <= cxl_dstate->payload_size); } else { ret = CXL_MBOX_INVALID_PAYLOAD_LENGTH; @@ -740,7 +758,7 @@ void cxl_initialize_mailbox(CXLDeviceState *cxl_dstate) for (int set = 0; set < 256; set++) { for (int cmd = 0; cmd < 256; cmd++) { if (cxl_dstate->cxl_cmd_set[set][cmd].handler) { - struct cxl_cmd *c = &cxl_dstate->cxl_cmd_set[set][cmd]; + const struct cxl_cmd *c = &cxl_dstate->cxl_cmd_set[set][cmd]; struct cel_log *log = &cxl_dstate->cel_log[cxl_dstate->cel_size];