From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933082Ab3FRTmv (ORCPT ); Tue, 18 Jun 2013 15:42:51 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:38445 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751301Ab3FRTmu (ORCPT ); Tue, 18 Jun 2013 15:42:50 -0400 Date: Tue, 18 Jun 2013 14:42:36 -0500 From: "Philip J. Kelleher" To: axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, brking@linux.vnet.ibm.com Subject: [PATCH 5/11] rsxx: Adding in sync_start module paramenter. Message-ID: <20130618194235.GF6492@oc6784271780.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-12-10) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13061819-7182-0000-0000-0000076437A6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Philip J Kelleher Before, the partition table would have to be reread because our card was attached before it transistioned out of it's 'starting' state. This change will cause the driver to wait to attach the device until the adapter is ready. Signed-off-by: Philip J Kelleher ------------------------------------------------------------------------------- diff -uprN -X linux-block-vanilla/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/core.c linux-block/drivers/block/rsxx/core.c --- linux-block-vanilla/drivers/block/rsxx/core.c 2013-06-17 16:53:06.790030813 -0500 +++ linux-block/drivers/block/rsxx/core.c 2013-06-17 17:25:48.811853040 -0500 @@ -39,6 +39,7 @@ #include "rsxx_cfg.h" #define NO_LEGACY 0 +#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */ MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD Device Driver"); MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM"); @@ -49,6 +50,11 @@ static unsigned int force_legacy = NO_LE module_param(force_legacy, uint, 0444); MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts"); +static unsigned int sync_start = 1; +module_param(sync_start, uint, 0444); +MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete " + "until the card startup has completed."); + static DEFINE_IDA(rsxx_disk_ida); static DEFINE_SPINLOCK(rsxx_ida_lock); @@ -540,6 +546,7 @@ static int rsxx_pci_probe(struct pci_dev { struct rsxx_cardinfo *card; int st; + unsigned int sync_timeout; dev_info(&dev->dev, "PCI-Flash SSD discovered\n"); @@ -698,6 +705,33 @@ static int rsxx_pci_probe(struct pci_dev if (st) dev_crit(CARD_TO_DEV(card), "Failed issuing card startup\n"); + if (sync_start) { + sync_timeout = SYNC_START_TIMEOUT; + + dev_info(CARD_TO_DEV(card), + "Waiting for card to startup\n"); + + do { + ssleep(1); + sync_timeout--; + + rsxx_get_card_state(card, &card->state); + } while (sync_timeout && + (card->state == CARD_STATE_STARTING)); + + if (card->state == CARD_STATE_STARTING) { + dev_warn(CARD_TO_DEV(card), + "Card startup timed out\n"); + card->size8 = 0; + } else { + dev_info(CARD_TO_DEV(card), + "card state: %s\n", + rsxx_card_state_to_str(card->state)); + st = rsxx_get_card_size8(card, &card->size8); + if (st) + card->size8 = 0; + } + } } else if (card->state == CARD_STATE_GOOD || card->state == CARD_STATE_RD_ONLY_FAULT) { st = rsxx_get_card_size8(card, &card->size8);