Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759734AbXKLXOs (ORCPT ); Mon, 12 Nov 2007 18:14:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758014AbXKLXOh (ORCPT ); Mon, 12 Nov 2007 18:14:37 -0500 Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:12806 "EHLO pd2mo2so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757654AbXKLXOf (ORCPT ); Mon, 12 Nov 2007 18:14:35 -0500 Date: Mon, 12 Nov 2007 17:13:37 -0600 From: Robert Hancock Subject: [PATCH] sata_nv: fix ADMA ATAPI issues with memory over 4GB To: linux-kernel , ide , Jeff Garzik , Tejun Heo Message-id: <4738DE21.8090702@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 7bit User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6058 Lines: 166 This fixes some problems with ATAPI devices on nForce4 controllers in ADMA mode on systems with memory located above 4GB. We need to make sure that the legacy PRD table and padding buffer are appropriately allocated according to the DMA mask requirements of the current operating mode (ADMA or legacy). Also, we should run any DMA command with result taskfile requested in ADMA mode when the port is in ADMA mode, otherwise it may try to use the legacy DMA engine in ADMA mode which is not allowed. Fixes Red Hat Bugzilla #351451: https://bugzilla.redhat.com/show_bug.cgi?id=351451 Signed-off-by: Robert Hancock --- linux-2.6.24-rc1-git10/drivers/ata/sata_nv.c 2007-11-01 20:01:32.000000000 -0600 +++ linux-2.6.24-rc1-git10edit/drivers/ata/sata_nv.c 2007-11-10 19:57:47.000000000 -0600 @@ -247,6 +247,7 @@ void __iomem *ctl_block; void __iomem *gen_block; void __iomem *notifier_clear_block; + u64 adma_dma_mask; u8 flags; int last_issue_ncq; }; @@ -747,11 +748,29 @@ on the port. */ adma_enable = 0; nv_adma_register_mode(ap); + if (!(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) { + /* Transitioning to legacy mode. Free the pad buffer. */ + ata_pad_free(ap, ap->host->dev); + ap->pad = NULL; + ap->pad_dma = 0; + } } else { - bounce_limit = *ap->dev->dma_mask; + bounce_limit = pp->adma_dma_mask; segment_boundary = NV_ADMA_DMA_BOUNDARY; sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN; adma_enable = 1; + + if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) { + /* Transitioning to ADMA mode. Free legacy PRD table + and the pad buffer. */ + ata_pad_free(ap, ap->host->dev); + ap->pad = NULL; + ap->pad_dma = 0; + dmam_free_coherent(ap->host->dev, ATA_PRD_TBL_SZ, + ap->prd, ap->prd_dma); + ap->prd = NULL; + ap->prd_dma = 0; + } } pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, ¤t_reg); @@ -763,23 +782,45 @@ config_mask = NV_MCP_SATA_CFG_20_PORT0_EN | NV_MCP_SATA_CFG_20_PORT0_PWB_EN; + /* Set appropriate DMA mask. */ + pci_set_dma_mask(pdev, bounce_limit); + pci_set_consistent_dma_mask(pdev, bounce_limit); + + blk_queue_bounce_limit(sdev->request_queue, bounce_limit); + blk_queue_segment_boundary(sdev->request_queue, segment_boundary); + blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize); + ata_port_printk(ap, KERN_INFO, + "bounce limit 0x%llX, segment boundary 0x%lX, hw segs %hu\n", + (unsigned long long)bounce_limit, segment_boundary, + sg_tablesize); + if (adma_enable) { new_reg = current_reg | config_mask; - pp->flags &= ~NV_ADMA_ATAPI_SETUP_COMPLETE; + if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) { + /* Transition to ADMA mode. + Reallocate the pad buffer. */ + rc = ata_pad_alloc(ap, ap->host->dev); + pp->flags &= ~NV_ADMA_ATAPI_SETUP_COMPLETE; + } } else { new_reg = current_reg & ~config_mask; - pp->flags |= NV_ADMA_ATAPI_SETUP_COMPLETE; + if (!(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) { + /* Transition to legacy mode. + Reallocate the legacy PRD and pad buffer. */ + ap->prd = dmam_alloc_coherent(ap->host->dev, + ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); + if (!ap->prd) + rc = -ENOMEM; + else + rc = ata_pad_alloc(ap, ap->host->dev); + + pp->flags |= NV_ADMA_ATAPI_SETUP_COMPLETE; + } } if (current_reg != new_reg) pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, new_reg); - blk_queue_bounce_limit(sdev->request_queue, bounce_limit); - blk_queue_segment_boundary(sdev->request_queue, segment_boundary); - blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize); - ata_port_printk(ap, KERN_INFO, - "bounce limit 0x%llX, segment boundary 0x%lX, hw segs %hu\n", - (unsigned long long)bounce_limit, segment_boundary, sg_tablesize); return rc; } @@ -791,11 +832,13 @@ static void nv_adma_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { - /* Since commands where a result TF is requested are not - executed in ADMA mode, the only time this function will be called - in ADMA mode will be if a command fails. In this case we - don't care about going into register mode with ADMA commands - pending, as the commands will all shortly be aborted anyway. */ + /* Other than when internal or pass-through commands are executed, + the only time this function will be called in ADMA mode will be + if a command fails. In the failure case we don't care about going + into register mode with ADMA commands pending, as the commands will + all shortly be aborted anyway. We assume that NCQ commands are not + issued via passthrough and so this will not abort any commands in + that case. */ nv_adma_register_mode(ap); ata_tf_read(ap, tf); @@ -1136,7 +1179,9 @@ VPRINTK("ENTER\n"); - rc = ata_port_start(ap); + /* Do not allocate standard ATA PRD buffer here. Only do this if + an ATAPI device is connected (in slave_config). */ + rc = ata_pad_alloc(ap, dev); if (rc) return rc; @@ -1150,6 +1195,7 @@ pp->gen_block = ap->host->iomap[NV_MMIO_BAR] + NV_ADMA_GEN; pp->notifier_clear_block = pp->gen_block + NV_ADMA_NOTIFIER_CLEAR + (4 * ap->port_no); + pp->adma_dma_mask = *dev->dma_mask & dev->coherent_dma_mask; mem = dmam_alloc_coherent(dev, NV_ADMA_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); @@ -1359,11 +1405,9 @@ struct nv_adma_port_priv *pp = qc->ap->private_data; /* ADMA engine can only be used for non-ATAPI DMA commands, - or interrupt-driven no-data commands, where a result taskfile - is not required. */ + or interrupt-driven no-data commands. */ if ((pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) || - (qc->tf.flags & ATA_TFLAG_POLLING) || - (qc->flags & ATA_QCFLAG_RESULT_TF)) + (qc->tf.flags & ATA_TFLAG_POLLING)) return 1; if ((qc->flags & ATA_QCFLAG_DMAMAP) || - 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/