From patchwork Tue Jul 18 16:04:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 790389 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xBlRB4kGpz9s06 for ; Wed, 19 Jul 2017 02:07:02 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751404AbdGRQGc (ORCPT ); Tue, 18 Jul 2017 12:06:32 -0400 Received: from ale.deltatee.com ([207.54.116.67]:36103 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751471AbdGRQE0 (ORCPT ); Tue, 18 Jul 2017 12:04:26 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1dXUyv-0000dJ-BM; Tue, 18 Jul 2017 10:04:18 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.89) (envelope-from ) id 1dXUyx-0001iC-91; Tue, 18 Jul 2017 10:04:19 -0600 From: Logan Gunthorpe To: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jon Mason , Dave Jiang , Allen Hubbe , Bjorn Helgaas , Greg Kroah-Hartman , Kurt Schwemmer , Stephen Bates , Serge Semin , Logan Gunthorpe Date: Tue, 18 Jul 2017 10:04:04 -0600 Message-Id: <20170718160409.6493-12-logang@deltatee.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170718160409.6493-1-logang@deltatee.com> References: <20170718160409.6493-1-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, jdmason@kudzu.us, dave.jiang@intel.com, Allen.Hubbe@emc.com, bhelgaas@google.com, gregkh@linuxfoundation.org, kurt.schwemmer@microsemi.com, sbates@raithlin.com, fancer.lancer@gmail.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-6.5 required=5.0 tests=ALL_TRUSTED,BAYES_00, MYRULES_FREE, MYRULES_NO_TEXT, RP_MATCHES_RCVD autolearn=no autolearn_force=no version=3.4.0 Subject: [PATCH v2 11/16] switchtec_ntb: add skeleton NTB driver X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add a skeleton NTB driver which will be filled out in subsequent patches. Signed-off-by: Logan Gunthorpe Reviewed-by: Stephen Bates Reviewed-by: Kurt Schwemmer --- drivers/ntb/hw/mscc/switchtec_ntb.c | 148 +++++++++++++++++++++++++++++++++++- include/linux/ntb.h | 3 + 2 files changed, 150 insertions(+), 1 deletion(-) diff --git a/drivers/ntb/hw/mscc/switchtec_ntb.c b/drivers/ntb/hw/mscc/switchtec_ntb.c index 852dc9869a3e..20f2fdda4644 100644 --- a/drivers/ntb/hw/mscc/switchtec_ntb.c +++ b/drivers/ntb/hw/mscc/switchtec_ntb.c @@ -18,6 +18,7 @@ #include #include #include +#include MODULE_DESCRIPTION("Microsemi Switchtec(tm) NTB Driver"); MODULE_VERSION("0.1"); @@ -71,6 +72,7 @@ struct shared_mw { #define LUT_SIZE SZ_64K struct switchtec_ntb { + struct ntb_dev ntb; struct switchtec_dev *stdev; int self_partition; @@ -161,10 +163,148 @@ static int switchtec_ntb_part_op(struct switchtec_ntb *sndev, return -EIO; } +static int switchtec_ntb_mw_count(struct ntb_dev *ntb, int pidx) +{ + return 0; +} + +static int switchtec_ntb_mw_get_align(struct ntb_dev *ntb, int pidx, + int widx, resource_size_t *addr_align, + resource_size_t *size_align, + resource_size_t *size_max) +{ + return 0; +} + +static int switchtec_ntb_mw_set_trans(struct ntb_dev *ntb, int pidx, int widx, + dma_addr_t addr, resource_size_t size) +{ + return 0; +} + +static int switchtec_ntb_peer_mw_count(struct ntb_dev *ntb) +{ + return 0; +} + +static int switchtec_ntb_peer_mw_get_addr(struct ntb_dev *ntb, int idx, + phys_addr_t *base, + resource_size_t *size) +{ + return 0; +} + +static u64 switchtec_ntb_link_is_up(struct ntb_dev *ntb, + enum ntb_speed *speed, + enum ntb_width *width) +{ + return 0; +} + +static int switchtec_ntb_link_enable(struct ntb_dev *ntb, + enum ntb_speed max_speed, + enum ntb_width max_width) +{ + return 0; +} + +static int switchtec_ntb_link_disable(struct ntb_dev *ntb) +{ + return 0; +} + +static u64 switchtec_ntb_db_valid_mask(struct ntb_dev *ntb) +{ + return 0; +} + +static int switchtec_ntb_db_vector_count(struct ntb_dev *ntb) +{ + return 0; +} + +static u64 switchtec_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector) +{ + return 0; +} + +static u64 switchtec_ntb_db_read(struct ntb_dev *ntb) +{ + return 0; +} + +static int switchtec_ntb_db_clear(struct ntb_dev *ntb, u64 db_bits) +{ + return 0; +} + +static int switchtec_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits) +{ + return 0; +} + +static int switchtec_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits) +{ + return 0; +} + +static int switchtec_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits) +{ + return 0; +} + +static int switchtec_ntb_spad_count(struct ntb_dev *ntb) +{ + return 0; +} + +static u32 switchtec_ntb_spad_read(struct ntb_dev *ntb, int idx) +{ + return 0; +} + +static int switchtec_ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val) +{ + return 0; +} + +static int switchtec_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, + int sidx, u32 val) +{ + return 0; +} + +static const struct ntb_dev_ops switchtec_ntb_ops = { + .mw_count = switchtec_ntb_mw_count, + .mw_get_align = switchtec_ntb_mw_get_align, + .mw_set_trans = switchtec_ntb_mw_set_trans, + .peer_mw_count = switchtec_ntb_peer_mw_count, + .peer_mw_get_addr = switchtec_ntb_peer_mw_get_addr, + .link_is_up = switchtec_ntb_link_is_up, + .link_enable = switchtec_ntb_link_enable, + .link_disable = switchtec_ntb_link_disable, + .db_valid_mask = switchtec_ntb_db_valid_mask, + .db_vector_count = switchtec_ntb_db_vector_count, + .db_vector_mask = switchtec_ntb_db_vector_mask, + .db_read = switchtec_ntb_db_read, + .db_clear = switchtec_ntb_db_clear, + .db_set_mask = switchtec_ntb_db_set_mask, + .db_clear_mask = switchtec_ntb_db_clear_mask, + .peer_db_set = switchtec_ntb_peer_db_set, + .spad_count = switchtec_ntb_spad_count, + .spad_read = switchtec_ntb_spad_read, + .spad_write = switchtec_ntb_spad_write, + .peer_spad_write = switchtec_ntb_peer_spad_write, +}; + static void switchtec_ntb_init_sndev(struct switchtec_ntb *sndev) { u64 part_map; + sndev->ntb.pdev = sndev->stdev->pdev; + sndev->ntb.topo = NTB_TOPO_SWITCH; + sndev->ntb.ops = &switchtec_ntb_ops; + sndev->self_partition = sndev->stdev->partition; sndev->mmio_ntb = sndev->stdev->mmio_ntb; @@ -512,7 +652,6 @@ static int switchtec_ntb_add(struct device *dev, return -ENOMEM; sndev->stdev = stdev; - switchtec_ntb_init_sndev(sndev); switchtec_ntb_init_mw(sndev); switchtec_ntb_init_db(sndev); @@ -532,11 +671,17 @@ static int switchtec_ntb_add(struct device *dev, switchtec_ntb_init_mw(sndev); + rc = ntb_register_device(&sndev->ntb); + if (rc) + goto deinit_and_exit; + stdev->sndev = sndev; dev_info(dev, "NTB device registered"); return 0; +deinit_and_exit: + switchtec_ntb_deinit_db_msg_irq(sndev); deinit_shared_and_exit: switchtec_ntb_deinit_shared_mw(sndev); free_and_exit: @@ -555,6 +700,7 @@ void switchtec_ntb_remove(struct device *dev, return; stdev->sndev = NULL; + ntb_unregister_device(&sndev->ntb); switchtec_ntb_deinit_db_msg_irq(sndev); switchtec_ntb_deinit_shared_mw(sndev); kfree(sndev); diff --git a/include/linux/ntb.h b/include/linux/ntb.h index 47f2966cfd7f..c308964777eb 100644 --- a/include/linux/ntb.h +++ b/include/linux/ntb.h @@ -70,6 +70,7 @@ struct pci_dev; * @NTB_TOPO_SEC: On secondary side of remote ntb. * @NTB_TOPO_B2B_USD: On primary side of local ntb upstream of remote ntb. * @NTB_TOPO_B2B_DSD: On primary side of local ntb downstream of remote ntb. + * @NTB_TOPO_SWITCH: Connected via a switch which supports ntb. */ enum ntb_topo { NTB_TOPO_NONE = -1, @@ -77,6 +78,7 @@ enum ntb_topo { NTB_TOPO_SEC, NTB_TOPO_B2B_USD, NTB_TOPO_B2B_DSD, + NTB_TOPO_SWITCH, }; static inline int ntb_topo_is_b2b(enum ntb_topo topo) @@ -97,6 +99,7 @@ static inline char *ntb_topo_string(enum ntb_topo topo) case NTB_TOPO_SEC: return "NTB_TOPO_SEC"; case NTB_TOPO_B2B_USD: return "NTB_TOPO_B2B_USD"; case NTB_TOPO_B2B_DSD: return "NTB_TOPO_B2B_DSD"; + case NTB_TOPO_SWITCH: return "NTB_TOPO_SWITCH"; } return "NTB_TOPO_INVALID"; }