Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754848AbZIUCnh (ORCPT ); Sun, 20 Sep 2009 22:43:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754415AbZIUCng (ORCPT ); Sun, 20 Sep 2009 22:43:36 -0400 Received: from na3sys009aog101.obsmtp.com ([74.125.149.67]:36851 "EHLO na3sys009aog101.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754227AbZIUCnf convert rfc822-to-8bit (ORCPT ); Sun, 20 Sep 2009 22:43:35 -0400 From: "Yang, Bo" To: "Yang, Bo" , "linux-scsi@vger.kernel.org" , "akpm@osdl.org" , "linux-kernel@vger.kernel.org" , "James.Bottomley@HansenPartnership.com" , "James.Bottomley@suse.de" Date: Sun, 20 Sep 2009 20:43:25 -0600 Subject: [PATCH 8/12] scsi: megaraid_sas - add the IEEE SGE support to SAS2 controller Thread-Topic: [PATCH 8/12] scsi: megaraid_sas - add the IEEE SGE support to SAS2 controller Thread-Index: Aco284muq21jjlUCRvWfDnAhnowdBQAABfzAAAAxetAAAF05EAAATiEQAAAy5GAAAEeYsADbDIQw Message-ID: <4B6A08C587958942AA3002690DD4F8C35C512404@cosmail02.lsi.com> In-Reply-To: <4B6A08C587958942AA3002690DD4F8C35C5119A4@cosmail02.lsi.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9010 Lines: 236 To increase the performance, megaraid sas driver added the IEEE SGE support to support SAS2 controller. Signed-off-by Bo Yang --- drivers/scsi/megaraid/megaraid_sas.c | 80 +++++++++++++++++++++++++++++++---- drivers/scsi/megaraid/megaraid_sas.h | 9 +++ 2 files changed, 82 insertions(+), 7 deletions(-) diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c --- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c 2009-09-14 06:14:35.000000000 -0400 +++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c 2009-09-14 06:42:53.000000000 -0400 @@ -696,6 +696,35 @@ megasas_make_sgl64(struct megasas_instan return sge_count; } +/** + * megasas_make_sgl_skinny - Prepares IEEE SGL + * @instance: Adapter soft state + * @scp: SCSI command from the mid-layer + * @mfi_sgl: SGL to be filled in + * + * If successful, this function returns the number of SG elements. Otherwise, + * it returnes -1. + */ +static int +megasas_make_sgl_skinny(struct megasas_instance *instance, + struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl) +{ + int i; + int sge_count; + struct scatterlist *os_sgl; + + sge_count = scsi_dma_map(scp); + + if (sge_count) { + scsi_for_each_sg(scp, os_sgl, sge_count, i) { + mfi_sgl->sge_skinny[i].length = sg_dma_len(os_sgl); + mfi_sgl->sge_skinny[i].phys_addr = + sg_dma_address(os_sgl); + } + } + return sge_count; +} + /** * megasas_get_frame_count - Computes the number of frames * @frame_type : type of frame- io or pthru frame @@ -704,7 +733,8 @@ megasas_make_sgl64(struct megasas_instan * Returns the number of frames required for numnber of sge's (sge_count) */ -static u32 megasas_get_frame_count(u8 sge_count, u8 frame_type) +static u32 megasas_get_frame_count(struct megasas_instance *instance, + u8 sge_count, u8 frame_type) { int num_cnt; int sge_bytes; @@ -714,6 +744,10 @@ static u32 megasas_get_frame_count(u8 sg sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : sizeof(struct megasas_sge32); + if (instance->flag_ieee) { + sge_sz = sizeof(struct megasas_sge_skinny); + } + /* * Main frame can contain 2 SGEs for 64-bit SGLs and * 3 SGEs for 32-bit SGLs for ldio & @@ -721,12 +755,16 @@ static u32 megasas_get_frame_count(u8 sg * 2 SGEs for 32-bit SGLs for pthru frame */ if (unlikely(frame_type == PTHRU_FRAME)) { - if (IS_DMA64) + if (instance->flag_ieee == 1) { + num_cnt = sge_count - 1; + } else if (IS_DMA64) num_cnt = sge_count - 1; else num_cnt = sge_count - 2; } else { - if (IS_DMA64) + if (instance->flag_ieee == 1) { + num_cnt = sge_count - 1; + } else if (IS_DMA64) num_cnt = sge_count - 2; else num_cnt = sge_count - 3; @@ -775,6 +813,10 @@ megasas_build_dcdb(struct megasas_instan else if (scp->sc_data_direction == PCI_DMA_NONE) flags = MFI_FRAME_DIR_NONE; + if (instance->flag_ieee == 1) { + flags |= MFI_FRAME_IEEE; + } + /* * Prepare the DCDB frame */ @@ -804,7 +846,11 @@ megasas_build_dcdb(struct megasas_instan /* * Construct SGL */ - if (IS_DMA64) { + if (instance->flag_ieee == 1) { + pthru->flags |= MFI_FRAME_SGL64; + pthru->sge_count = megasas_make_sgl_skinny(instance, scp, + &pthru->sgl); + } else if (IS_DMA64) { pthru->flags |= MFI_FRAME_SGL64; pthru->sge_count = megasas_make_sgl64(instance, scp, &pthru->sgl); @@ -823,7 +869,7 @@ megasas_build_dcdb(struct megasas_instan * Compute the total number of frames this command consumes. FW uses * this number to pull sufficient number of frames from host memory. */ - cmd->frame_count = megasas_get_frame_count(pthru->sge_count, + cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count, PTHRU_FRAME); return cmd->frame_count; @@ -854,6 +900,10 @@ megasas_build_ldio(struct megasas_instan else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) flags = MFI_FRAME_DIR_READ; + if (instance->flag_ieee == 1) { + flags |= MFI_FRAME_IEEE; + } + /* * Prepare the Logical IO frame: 2nd bit is zero for all read cmds */ @@ -924,7 +974,11 @@ megasas_build_ldio(struct megasas_instan /* * Construct SGL */ - if (IS_DMA64) { + if (instance->flag_ieee) { + ldio->flags |= MFI_FRAME_SGL64; + ldio->sge_count = megasas_make_sgl_skinny(instance, scp, + &ldio->sgl); + } else if (IS_DMA64) { ldio->flags |= MFI_FRAME_SGL64; ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); } else @@ -941,7 +995,8 @@ megasas_build_ldio(struct megasas_instan * Compute the total number of frames this command consumes. FW uses * this number to pull sufficient number of frames from host memory. */ - cmd->frame_count = megasas_get_frame_count(ldio->sge_count, IO_FRAME); + cmd->frame_count = megasas_get_frame_count(instance, + ldio->sge_count, IO_FRAME); return cmd->frame_count; } @@ -1929,6 +1984,10 @@ static int megasas_create_frame_pool(str sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : sizeof(struct megasas_sge32); + if (instance->flag_ieee) { + sge_sz = sizeof(struct megasas_sge_skinny); + } + /* * Calculated the number of 64byte frames required for SGL */ @@ -2725,6 +2784,11 @@ megasas_register_aen(struct megasas_inst dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); + if (instance->aen_cmd != NULL) { + megasas_return_cmd(instance, cmd); + return 0; + } + /* * Store reference to the cmd used to register for AEN. When an * application wants us to register for AEN, we have to abort this @@ -2895,6 +2959,7 @@ megasas_probe_one(struct pci_dev *pdev, *instance->producer = 0; *instance->consumer = 0; megasas_poll_wait_aen = 0; + instance->flag_ieee = 0; instance->evt_detail = pci_alloc_consistent(pdev, sizeof(struct @@ -2933,6 +2998,7 @@ megasas_probe_one(struct pci_dev *pdev, if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) || (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) { + instance->flag_ieee = 1; sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS); } else sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h --- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h 2009-09-14 06:14:35.000000000 -0400 +++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h 2009-09-14 07:53:02.000000000 -0400 @@ -96,6 +96,7 @@ #define MFI_FRAME_DIR_WRITE 0x0008 #define MFI_FRAME_DIR_READ 0x0010 #define MFI_FRAME_DIR_BOTH 0x0018 +#define MFI_FRAME_IEEE 0x0020 /* * Definition for cmd_status @@ -732,10 +733,17 @@ struct megasas_sge64 { } __attribute__ ((packed)); +struct megasas_sge_skinny { + u64 phys_addr; + u32 length; + u32 flag; +} __packed; + union megasas_sgl { struct megasas_sge32 sge32[1]; struct megasas_sge64 sge64[1]; + struct megasas_sge_skinny sge_skinny[1]; } __attribute__ ((packed)); @@ -1210,6 +1218,7 @@ struct megasas_instance { u8 flag; u8 unload; + u8 flag_ieee; unsigned long last_time; struct timer_list io_completion_timer; -- 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/