From patchwork Wed May 29 21:38:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13679505 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3F1D91C9EB3; Wed, 29 May 2024 21:44:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717019043; cv=none; b=Bl4yVpRkNZMTP+FMT2VaXxudQ/oPeLbAgBngzw8+Up1+7/K4jemjEhe28LXdvZR/gERU5eB+lbmAP7OubmOl6MXwVrQuaDJERXGVZKP8LpmuxLL4DSdpLPH7Oie+CuP8aQSjagKB9GfdH6tuLoAuvnO63UYm/5QddJ8Wbi4c+mU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717019043; c=relaxed/simple; bh=z67eTnsD58Y5EXKW8A0xQ4NfFfHBPImkso86TSGZc4c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gCQPCgEpwYiIzetC3o9B6Gmi+gwqNt0gYFUlcmHqlsEem2kzidN4m48xhcJmOlYykU7EeEjb2yj8Anaa+l/PHfkmhS8roiJ3OIQypx4LYsUrOXZHyAsP68F0JjvGigON4Y2vQsWDcDyPVExIvksM0ERAF1IHf6SeeI6P0m+LoaQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B799C32781; Wed, 29 May 2024 21:44:02 +0000 (UTC) From: Dave Jiang To: linux-cxl@vger.kernel.org, linux-pci@vger.kernel.org Cc: dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, Jonathan.Cameron@huawei.com, dave@stgolabs.net Subject: [PATCH v3 1/2] cxl: Preserve the CDAT access_coordinate for an endpoint Date: Wed, 29 May 2024 14:38:57 -0700 Message-ID: <20240529214357.1193417-2-dave.jiang@intel.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240529214357.1193417-1-dave.jiang@intel.com> References: <20240529214357.1193417-1-dave.jiang@intel.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Keep the access_coordinate from the CDAT tables for region perf calculations. The region perf calculation requires all participating endpoints to have arrived in order to determine if there are limitations of bandwidth data due to shared uplink. Signed-off-by: Dave Jiang --- drivers/cxl/core/cdat.c | 10 ++++++---- drivers/cxl/cxlmem.h | 1 + 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c index bb83867d9fec..fea214340d4b 100644 --- a/drivers/cxl/core/cdat.c +++ b/drivers/cxl/core/cdat.c @@ -15,7 +15,7 @@ struct dsmas_entry { struct range dpa_range; u8 handle; struct access_coordinate coord[ACCESS_COORDINATE_MAX]; - + struct access_coordinate cdat_coord[ACCESS_COORDINATE_MAX]; int entries; int qos_class; }; @@ -163,7 +163,7 @@ static int cdat_dslbis_handler(union acpi_subtable_headers *header, void *arg, val = cdat_normalize(le16_to_cpu(le_val), le64_to_cpu(le_base), dslbis->data_type); - cxl_access_coordinate_set(dent->coord, dslbis->data_type, val); + cxl_access_coordinate_set(dent->cdat_coord, dslbis->data_type, val); return 0; } @@ -220,7 +220,7 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port, xa_for_each(dsmas_xa, index, dent) { int qos_class; - cxl_coordinates_combine(dent->coord, dent->coord, ep_c); + cxl_coordinates_combine(dent->coord, dent->cdat_coord, ep_c); dent->entries = 1; rc = cxl_root->ops->qos_class(cxl_root, &dent->coord[ACCESS_COORDINATE_CPU], @@ -241,8 +241,10 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port, static void update_perf_entry(struct device *dev, struct dsmas_entry *dent, struct cxl_dpa_perf *dpa_perf) { - for (int i = 0; i < ACCESS_COORDINATE_MAX; i++) + for (int i = 0; i < ACCESS_COORDINATE_MAX; i++) { dpa_perf->coord[i] = dent->coord[i]; + dpa_perf->cdat_coord[i] = dent->cdat_coord[i]; + } dpa_perf->dpa_range = dent->dpa_range; dpa_perf->qos_class = dent->qos_class; dev_dbg(dev, diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 19aba81cdf13..fb365453f996 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -402,6 +402,7 @@ enum cxl_devtype { struct cxl_dpa_perf { struct range dpa_range; struct access_coordinate coord[ACCESS_COORDINATE_MAX]; + struct access_coordinate cdat_coord[ACCESS_COORDINATE_MAX]; int qos_class; };