From f4c9a1317d32bb0af7546ef0c1dcc3be52dc8d0a Mon Sep 17 00:00:00 2001 From: "Yang, Bo" Date: Tue, 6 Oct 2009 14:43:28 -0600 Subject: [PATCH] [SCSI] megaraid_sas: add the IEEE SGE support to SAS2 controller To increase the performance, megaraid sas driver added the IEEE SGE support to support SAS2 controller. Signed-off-by Bo Yang Signed-off-by: James Bottomley --- drivers/scsi/megaraid/megaraid_sas.c | 80 +++++++++++++++++++++++++--- drivers/scsi/megaraid/megaraid_sas.h | 9 ++++ 2 files changed, 82 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index 5afd65121725..4c04a68bad6c 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c @@ -696,6 +696,35 @@ megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, 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_instance *instance, struct scsi_cmnd *scp, * 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 sge_count, u8 frame_type) 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 sge_count, u8 frame_type) * 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_instance *instance, struct scsi_cmnd *scp, 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_instance *instance, struct scsi_cmnd *scp, /* * 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_instance *instance, struct scsi_cmnd *scp, * 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_instance *instance, struct scsi_cmnd *scp, 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_instance *instance, struct scsi_cmnd *scp, /* * 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_instance *instance, struct scsi_cmnd *scp, * 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(struct megasas_instance *instance) 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_instance *instance, u32 seq_num, 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, const struct pci_device_id *id) *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, const struct pci_device_id *id) 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 --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 4c78cd32e757..a1fd44bc1817 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -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; -- 2.39.5