From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3znTST2gSMzDr0b for ; Fri, 23 Feb 2018 09:25:12 +1100 (AEDT) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w1MMO8TQ097577 for ; Thu, 22 Feb 2018 17:25:10 -0500 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ga2qx8phf-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 22 Feb 2018 17:25:10 -0500 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 22 Feb 2018 17:25:10 -0500 From: Uma Krishnan To: linux-scsi@vger.kernel.org, James Bottomley , "Martin K. Petersen" , "Matthew R. Ochs" , "Manoj N. Kumar" Cc: linuxppc-dev@lists.ozlabs.org, Andrew Donnellan , Frederic Barrat , Christophe Lombard Subject: [PATCH 17/38] cxlflash: Support starting an adapter context Date: Thu, 22 Feb 2018 16:25:04 -0600 In-Reply-To: <1519338010-51782-1-git-send-email-ukrishn@linux.vnet.ibm.com> References: <1519338010-51782-1-git-send-email-ukrishn@linux.vnet.ibm.com> Message-Id: <1519338304-52398-1-git-send-email-ukrishn@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Once the adapter context is created, it needs to be started by assigning the MMIO space for the context and by enabling the process element in the link. This commit adds the skeleton for starting the context and assigns the context specific MMIO space. Master contexts have access to the global MMIO space while the rest have access to the context specific space. Signed-off-by: Uma Krishnan --- drivers/scsi/cxlflash/ocxl_hw.c | 39 +++++++++++++++++++++++++++++++++++++++ drivers/scsi/cxlflash/ocxl_hw.h | 3 +++ 2 files changed, 42 insertions(+) diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c index 824d789..7d92df0 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.c +++ b/drivers/scsi/cxlflash/ocxl_hw.c @@ -164,6 +164,44 @@ static int ocxlflash_process_element(void *ctx_cookie) } /** + * start_context() - local routine to start a context + * @ctx: Adapter context to be started. + * + * Assign the context specific MMIO space. + * + * Return: 0 on success, -errno on failure + */ +static int start_context(struct ocxlflash_context *ctx) +{ + struct ocxl_hw_afu *afu = ctx->hw_afu; + struct ocxl_afu_config *acfg = &afu->acfg; + bool master = ctx->master; + + if (master) { + ctx->psn_size = acfg->global_mmio_size; + ctx->psn_phys = afu->gmmio_phys; + } else { + ctx->psn_size = acfg->pp_mmio_stride; + ctx->psn_phys = afu->ppmmio_phys + (ctx->pe * ctx->psn_size); + } + + return 0; +} + +/** + * ocxlflash_start_context() - start a kernel context + * @ctx_cookie: Adapter context to be started. + * + * Return: 0 on success, -errno on failure + */ +static int ocxlflash_start_context(void *ctx_cookie) +{ + struct ocxlflash_context *ctx = ctx_cookie; + + return start_context(ctx); +} + +/** * ocxlflash_set_master() - sets the context as master * @ctx_cookie: Adapter context to set as master. */ @@ -573,6 +611,7 @@ static void *ocxlflash_fops_get_context(struct file *file) const struct cxlflash_backend_ops cxlflash_ocxl_ops = { .module = THIS_MODULE, .process_element = ocxlflash_process_element, + .start_context = ocxlflash_start_context, .set_master = ocxlflash_set_master, .get_context = ocxlflash_get_context, .dev_context_init = ocxlflash_dev_context_init, diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h index fbe9741..6912dd1 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.h +++ b/drivers/scsi/cxlflash/ocxl_hw.h @@ -40,4 +40,7 @@ struct ocxlflash_context { struct address_space *mapping; /* Mapping for pseudo filesystem */ bool master; /* Whether this is a master context */ int pe; /* Process element */ + + phys_addr_t psn_phys; /* Process mapping */ + u64 psn_size; /* Process mapping size */ }; -- 2.1.0