From patchwork Fri Feb 18 19:50:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 544201 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 4D8EFC433EF for ; Fri, 18 Feb 2022 19:52:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238252AbiBRTw2 (ORCPT ); Fri, 18 Feb 2022 14:52:28 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:52188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238384AbiBRTwG (ORCPT ); Fri, 18 Feb 2022 14:52:06 -0500 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A22E9293B6F for ; Fri, 18 Feb 2022 11:51:48 -0800 (PST) Received: by mail-pl1-f169.google.com with SMTP id w1so7968300plb.6 for ; Fri, 18 Feb 2022 11:51:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/Ba4bEJmtkM/3WJAT4TgzDstqDhaDKX2I2VSFRMVcdg=; b=vjobPCw58igYBof9X6bMi1Tq6Rmt1eozAgaJn0YSBX2vEknppBy5+qgjuBl7O5YmSf 6AgW+r97eaFWtnGqCbir1zyEBDbkzn2gL0HB7Kll7Sd2qbfmIPmzYtDMsJJY/bIOe4bs OLWOPV9TJXzv8a+0Y0fU388SmhKivmcdmffBfRitsMWsvMPpe4tEyFI53mpOCp9TvU0z 509exjnfdRxrF/7U94jfg0fX0gSzoys/J4i1U7/K8hyTBSW97iunzLkBqJAA8K0nwVdz k/jZlkC2r9+bT+a5y0Hvm88KJbalXrm75dBLjQ5mEmyTprAQD1j2uUuSPE1MUGB8i3Z7 a5wg== X-Gm-Message-State: AOAM5334w4jacXXnYslll2wRShBA9OgC/cj2gNGvfKrhyEQD83mMxTa7 NnC+vZm2nYdcpre5XQ1vDIc= X-Google-Smtp-Source: ABdhPJwMa+OebcEPgOJ/NFZV7hBhwH4DTyK6JsWoezcth6bz4W/sb0CD2DoV9hLdpFmgolvuy0uQHg== X-Received: by 2002:a17:902:d683:b0:14c:c0a9:34f3 with SMTP id v3-20020a170902d68300b0014cc0a934f3mr8708834ply.109.1645213907986; Fri, 18 Feb 2022 11:51:47 -0800 (PST) Received: from asus.hsd1.ca.comcast.net ([2601:647:4000:d7:feaa:14ff:fe9d:6dbd]) by smtp.gmail.com with ESMTPSA id e15sm3930523pfv.104.2022.02.18.11.51.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Feb 2022 11:51:47 -0800 (PST) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, Bart Van Assche , Russell King , Hannes Reinecke , Himanshu Madhani , "James E.J. Bottomley" Subject: [PATCH v5 10/49] scsi: arm: Move the SCSI pointer to private command data Date: Fri, 18 Feb 2022 11:50:38 -0800 Message-Id: <20220218195117.25689-11-bvanassche@acm.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220218195117.25689-1-bvanassche@acm.org> References: <20220218195117.25689-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Set .cmd_size in the SCSI host template instead of using the SCSI pointer from struct scsi_cmnd. This patch prepares for removal of the SCSI pointer from struct scsi_cmnd. The ARM SCSI drivers have been identified as follows: $ git grep -l '#include.*arm_scsi.h' drivers/scsi/arm/acornscsi.c drivers/scsi/arm/cumana_2.c drivers/scsi/arm/eesox.c drivers/scsi/arm/fas216.c drivers/scsi/arm/powertec.c Cc: Russell King Reviewed-by: Hannes Reinecke Reviewed-by: Himanshu Madhani Signed-off-by: Bart Van Assche --- drivers/scsi/arm/acornscsi.c | 20 ++++++++++++-------- drivers/scsi/arm/arm_scsi.h | 33 +++++++++++++++++++++++---------- drivers/scsi/arm/fas216.c | 28 +++++++++++++++++----------- drivers/scsi/arm/fas216.h | 4 ++++ 4 files changed, 56 insertions(+), 29 deletions(-) diff --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c index 38aa9333631b..7602639da9b3 100644 --- a/drivers/scsi/arm/acornscsi.c +++ b/drivers/scsi/arm/acornscsi.c @@ -729,7 +729,7 @@ intr_ret_t acornscsi_kick(AS_Host *host) */ host->scsi.phase = PHASE_CONNECTING; host->SCpnt = SCpnt; - host->scsi.SCp = SCpnt->SCp; + host->scsi.SCp = *arm_scsi_pointer(SCpnt); host->dma.xfer_setup = 0; host->dma.xfer_required = 0; host->dma.xfer_done = 0; @@ -1424,6 +1424,7 @@ unsigned char acornscsi_readmessagebyte(AS_Host *host) static void acornscsi_message(AS_Host *host) { + struct scsi_pointer *scsi_pointer; unsigned char message[16]; unsigned int msgidx = 0, msglen = 1; @@ -1493,8 +1494,9 @@ void acornscsi_message(AS_Host *host) * the saved data pointer for the current I/O process. */ acornscsi_dma_cleanup(host); - host->SCpnt->SCp = host->scsi.SCp; - host->SCpnt->SCp.sent_command = 0; + scsi_pointer = arm_scsi_pointer(host->SCpnt); + *scsi_pointer = host->scsi.SCp; + scsi_pointer->sent_command = 0; host->scsi.phase = PHASE_MSGIN; break; @@ -1509,7 +1511,7 @@ void acornscsi_message(AS_Host *host) * the present command and status areas.' */ acornscsi_dma_cleanup(host); - host->scsi.SCp = host->SCpnt->SCp; + host->scsi.SCp = *arm_scsi_pointer(host->SCpnt); host->scsi.phase = PHASE_MSGIN; break; @@ -1809,7 +1811,7 @@ int acornscsi_reconnect_finish(AS_Host *host) /* * Restore data pointer from SAVED pointers. */ - host->scsi.SCp = host->SCpnt->SCp; + host->scsi.SCp = *arm_scsi_pointer(host->SCpnt); #if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) printk(", data pointers: [%p, %X]", host->scsi.SCp.ptr, host->scsi.SCp.this_residual); @@ -2408,6 +2410,7 @@ acornscsi_intr(int irq, void *dev_id) */ static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt) { + struct scsi_pointer *scsi_pointer = arm_scsi_pointer(SCpnt); void (*done)(struct scsi_cmnd *) = scsi_done; AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; @@ -2423,9 +2426,9 @@ static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt) SCpnt->host_scribble = NULL; SCpnt->result = 0; - SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); - SCpnt->SCp.sent_command = 0; - SCpnt->SCp.scsi_xferred = 0; + scsi_pointer->phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); + scsi_pointer->sent_command = 0; + scsi_pointer->scsi_xferred = 0; init_SCp(SCpnt); @@ -2791,6 +2794,7 @@ static struct scsi_host_template acornscsi_template = { .cmd_per_lun = 2, .dma_boundary = PAGE_SIZE - 1, .proc_name = "acornscsi", + .cmd_size = sizeof(struct arm_cmd_priv), }; static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) diff --git a/drivers/scsi/arm/arm_scsi.h b/drivers/scsi/arm/arm_scsi.h index 3eb5c6aa93c9..ea9fcd92c6de 100644 --- a/drivers/scsi/arm/arm_scsi.h +++ b/drivers/scsi/arm/arm_scsi.h @@ -9,6 +9,17 @@ #define BELT_AND_BRACES +struct arm_cmd_priv { + struct scsi_pointer scsi_pointer; +}; + +static inline struct scsi_pointer *arm_scsi_pointer(struct scsi_cmnd *cmd) +{ + struct arm_cmd_priv *acmd = scsi_cmd_priv(cmd); + + return &acmd->scsi_pointer; +} + /* * The scatter-gather list handling. This contains all * the yucky stuff that needs to be fixed properly. @@ -76,16 +87,18 @@ static inline void put_next_SCp_byte(struct scsi_pointer *SCp, unsigned char c) static inline void init_SCp(struct scsi_cmnd *SCpnt) { - memset(&SCpnt->SCp, 0, sizeof(struct scsi_pointer)); + struct scsi_pointer *scsi_pointer = arm_scsi_pointer(SCpnt); + + memset(scsi_pointer, 0, sizeof(struct scsi_pointer)); if (scsi_bufflen(SCpnt)) { unsigned long len = 0; - SCpnt->SCp.buffer = scsi_sglist(SCpnt); - SCpnt->SCp.buffers_residual = scsi_sg_count(SCpnt) - 1; - SCpnt->SCp.ptr = sg_virt(SCpnt->SCp.buffer); - SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length; - SCpnt->SCp.phase = scsi_bufflen(SCpnt); + scsi_pointer->buffer = scsi_sglist(SCpnt); + scsi_pointer->buffers_residual = scsi_sg_count(SCpnt) - 1; + scsi_pointer->ptr = sg_virt(scsi_pointer->buffer); + scsi_pointer->this_residual = scsi_pointer->buffer->length; + scsi_pointer->phase = scsi_bufflen(SCpnt); #ifdef BELT_AND_BRACES { /* @@ -109,15 +122,15 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt) * FIXME: Totaly naive fixup. We should abort * with error */ - SCpnt->SCp.phase = + scsi_pointer->phase = min_t(unsigned long, len, scsi_bufflen(SCpnt)); } } #endif } else { - SCpnt->SCp.ptr = NULL; - SCpnt->SCp.this_residual = 0; - SCpnt->SCp.phase = 0; + scsi_pointer->ptr = NULL; + scsi_pointer->this_residual = 0; + scsi_pointer->phase = 0; } } diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c index a23e34c9f7de..4ce0b2d73614 100644 --- a/drivers/scsi/arm/fas216.c +++ b/drivers/scsi/arm/fas216.c @@ -761,7 +761,7 @@ static void fas216_transfer(FAS216_Info *info) fas216_log(info, LOG_ERROR, "null buffer passed to " "fas216_starttransfer"); print_SCp(&info->scsi.SCp, "SCp: ", "\n"); - print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n"); + print_SCp(arm_scsi_pointer(info->SCpnt), "Cmnd SCp: ", "\n"); return; } @@ -1011,7 +1011,7 @@ fas216_reselected_intr(FAS216_Info *info) /* * Restore data pointer from SAVED data pointer */ - info->scsi.SCp = info->SCpnt->SCp; + info->scsi.SCp = *arm_scsi_pointer(info->SCpnt); fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]", info->scsi.SCp.ptr, info->scsi.SCp.this_residual); @@ -1054,6 +1054,7 @@ fas216_reselected_intr(FAS216_Info *info) static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen) { + struct scsi_pointer *scsi_pointer; int i; switch (message[0]) { @@ -1078,8 +1079,9 @@ static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int * as required by the SCSI II standard. These always * point to the start of their respective areas. */ - info->SCpnt->SCp = info->scsi.SCp; - info->SCpnt->SCp.sent_command = 0; + scsi_pointer = arm_scsi_pointer(info->SCpnt); + *scsi_pointer = info->scsi.SCp; + scsi_pointer->sent_command = 0; fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, "save data pointers: [%p, %X]", info->scsi.SCp.ptr, info->scsi.SCp.this_residual); @@ -1092,7 +1094,7 @@ static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int /* * Restore current data pointer from SAVED data pointer */ - info->scsi.SCp = info->SCpnt->SCp; + info->scsi.SCp = *arm_scsi_pointer(info->SCpnt); fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, "restore data pointers: [%p, 0x%x]", info->scsi.SCp.ptr, info->scsi.SCp.this_residual); @@ -1770,7 +1772,7 @@ static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt) * claim host busy */ info->scsi.phase = PHASE_SELECTION; - info->scsi.SCp = SCpnt->SCp; + info->scsi.SCp = *arm_scsi_pointer(SCpnt); info->SCpnt = SCpnt; info->dma.transfer_type = fasdma_none; @@ -1849,7 +1851,7 @@ static void fas216_do_bus_device_reset(FAS216_Info *info, * claim host busy */ info->scsi.phase = PHASE_SELECTION; - info->scsi.SCp = SCpnt->SCp; + info->scsi.SCp = *arm_scsi_pointer(SCpnt); info->SCpnt = SCpnt; info->dma.transfer_type = fasdma_none; @@ -1999,11 +2001,13 @@ static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result) { + struct scsi_pointer *scsi_pointer = arm_scsi_pointer(SCpnt); + fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, "request sense complete, result=0x%04x%02x%02x", - result, SCpnt->SCp.Message, SCpnt->SCp.Status); + result, scsi_pointer->Message, scsi_pointer->Status); - if (result != DID_OK || SCpnt->SCp.Status != SAM_STAT_GOOD) + if (result != DID_OK || scsi_pointer->Status != SAM_STAT_GOOD) /* * Something went wrong. Make sure that we don't * have valid data in the sense buffer that could @@ -2033,6 +2037,8 @@ static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, static void fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result) { + struct scsi_pointer *scsi_pointer = arm_scsi_pointer(SCpnt); + info->stats.fins += 1; set_host_byte(SCpnt, result); @@ -2107,8 +2113,8 @@ fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result) fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, "requesting sense"); init_SCp(SCpnt); - SCpnt->SCp.Message = 0; - SCpnt->SCp.Status = 0; + scsi_pointer->Message = 0; + scsi_pointer->Status = 0; SCpnt->host_scribble = (void *)fas216_rq_sns_done; /* diff --git a/drivers/scsi/arm/fas216.h b/drivers/scsi/arm/fas216.h index abf960487314..08113277a2a9 100644 --- a/drivers/scsi/arm/fas216.h +++ b/drivers/scsi/arm/fas216.h @@ -312,6 +312,10 @@ typedef struct { /* driver-private data per SCSI command. */ struct fas216_cmd_priv { + /* + * @scsi_pointer must be the first member. See also arm_scsi_pointer(). + */ + struct scsi_pointer scsi_pointer; void (*scsi_done)(struct scsi_cmnd *cmd); };