Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751536Ab1BVUOZ (ORCPT ); Tue, 22 Feb 2011 15:14:25 -0500 Received: from g1t0028.austin.hp.com ([15.216.28.35]:16425 "EHLO g1t0028.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750813Ab1BVUOX (ORCPT ); Tue, 22 Feb 2011 15:14:23 -0500 Subject: [PATCH 2/6] cciss: Inform controller we are using 32-bit tags. To: axboe@kernel.dk From: "Stephen M. Cameron" Cc: mikem@beardog.cce.hp.com, akpm@linux-foundation.org, thenzl@redhat.com, linux-kernel@vger.kernel.org, smcameron@yahoo.com Date: Tue, 22 Feb 2011 14:14:21 -0600 Message-ID: <20110222201421.21961.3717.stgit@beardog.cce.hp.com> In-Reply-To: <20110222201025.21961.82560.stgit@beardog.cce.hp.com> References: <20110222201025.21961.82560.stgit@beardog.cce.hp.com> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4338 Lines: 111 From: Stephen M. Cameron Controller will transfer only 32-bits on completion if it knows we are only using 32-bit tags. Also, some newer controllers apparently (and erroneously) require that we only use 32-bit tags, and that we inform the controller of this. Signed-off-by: Stephen M. Cameron --- drivers/block/cciss.c | 25 +++++++++++++++---------- drivers/block/cciss_cmd.h | 1 + 2 files changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index bbf82e5..2e832b0 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -231,7 +231,7 @@ static const struct block_device_operations cciss_fops = { */ static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c) { - if (likely(h->transMethod == CFGTBL_Trans_Performant)) + if (likely(h->transMethod & CFGTBL_Trans_Performant)) c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1); } @@ -3136,10 +3136,13 @@ static inline u32 cciss_tag_to_index(u32 tag) return tag >> DIRECT_LOOKUP_SHIFT; } -static inline u32 cciss_tag_discard_error_bits(u32 tag) +static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag) { -#define CCISS_ERROR_BITS 0x03 - return tag & ~CCISS_ERROR_BITS; +#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1) +#define CCISS_SIMPLE_ERROR_BITS 0x03 + if (likely(h->transMethod & CFGTBL_Trans_Performant)) + return tag & ~CCISS_PERF_ERROR_BITS; + return tag & ~CCISS_SIMPLE_ERROR_BITS; } static inline void cciss_mark_tag_indexed(u32 *tag) @@ -3365,7 +3368,7 @@ static inline u32 next_command(ctlr_info_t *h) { u32 a; - if (unlikely(h->transMethod != CFGTBL_Trans_Performant)) + if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant))) return h->access.command_completed(h); if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { @@ -3403,9 +3406,9 @@ static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag) CommandList_struct *c = NULL; __u32 busaddr_masked, tag_masked; - tag_masked = cciss_tag_discard_error_bits(raw_tag); + tag_masked = cciss_tag_discard_error_bits(h, raw_tag); list_for_each_entry(c, &h->cmpQ, list) { - busaddr_masked = cciss_tag_discard_error_bits(c->busaddr); + busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr); if (busaddr_masked == tag_masked) { finish_cmd(h, c, raw_tag); return next_command(h); @@ -3757,7 +3760,8 @@ static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h) } } -static __devinit void cciss_enter_performant_mode(ctlr_info_t *h) +static __devinit void cciss_enter_performant_mode(ctlr_info_t *h, + u32 use_short_tags) { /* This is a bit complicated. There are 8 registers on * the controller which we write to to tell it 8 different @@ -3812,7 +3816,7 @@ static __devinit void cciss_enter_performant_mode(ctlr_info_t *h) writel(0, &h->transtable->RepQCtrAddrHigh32); writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); writel(0, &h->transtable->RepQAddr0High32); - writel(CFGTBL_Trans_Performant, + writel(CFGTBL_Trans_Performant | use_short_tags, &(h->cfgtable->HostWrite.TransportRequest)); writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); @@ -3859,7 +3863,8 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h) if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL)) goto clean_up; - cciss_enter_performant_mode(h); + cciss_enter_performant_mode(h, + trans_support & CFGTBL_Trans_use_short_tags); /* Change the access methods to the performant access methods */ h->access = SA5_performant_access; diff --git a/drivers/block/cciss_cmd.h b/drivers/block/cciss_cmd.h index 35463d2..cd441be 100644 --- a/drivers/block/cciss_cmd.h +++ b/drivers/block/cciss_cmd.h @@ -56,6 +56,7 @@ #define CFGTBL_Trans_Simple 0x00000002l #define CFGTBL_Trans_Performant 0x00000004l +#define CFGTBL_Trans_use_short_tags 0x20000000l #define CFGTBL_BusType_Ultra2 0x00000001l #define CFGTBL_BusType_Ultra3 0x00000002l -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/