From: Xiangliang Yu Date: Tue, 24 May 2011 14:38:10 +0000 (+0800) Subject: [SCSI] mvsas: update comments X-Git-Tag: v3.1-rc1~113^2~63 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e144f7ef49ec85e9dfdf130f3a9a2372fe5fe39b;p=pandora-kernel.git [SCSI] mvsas: update comments Remove obsolete comments and add new comments Signed-off-by: Xiangliang Yu Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/mvsas/mv_64xx.c b/drivers/scsi/mvsas/mv_64xx.c index bc75ba7488d8..dec5f96f47a0 100644 --- a/drivers/scsi/mvsas/mv_64xx.c +++ b/drivers/scsi/mvsas/mv_64xx.c @@ -33,7 +33,6 @@ static void mvs_64xx_detect_porttype(struct mvs_info *mvi, int i) u32 reg; struct mvs_phy *phy = &mvi->phy[i]; - /* TODO check & save device type */ reg = mr32(MVS_GBL_PORT_TYPE); phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA); if (reg & MODE_SAS_SATA & (1 << i)) @@ -63,7 +62,6 @@ static void __devinit mvs_64xx_phy_hacks(struct mvs_info *mvi) mvs_phy_hacks(mvi); if (!(mvi->flags & MVF_FLAG_SOC)) { - /* TEST - for phy decoding error, adjust voltage levels */ for (i = 0; i < MVS_SOC_PORTS; i++) { mvs_write_port_vsr_addr(mvi, i, VSR_PHY_MODE8); mvs_write_port_vsr_data(mvi, i, 0x2F0); @@ -375,13 +373,7 @@ static int __devinit mvs_64xx_init(struct mvs_info *mvi) mvs_update_phyinfo(mvi, i, 1); } - /* FIXME: update wide port bitmaps */ - /* little endian for open address and command table, etc. */ - /* - * it seems that ( from the spec ) turning on big-endian won't - * do us any good on big-endian machines, need further confirmation - */ cctl = mr32(MVS_CTL); cctl |= CCTL_ENDIAN_CMD; cctl |= CCTL_ENDIAN_DATA; @@ -394,8 +386,8 @@ static int __devinit mvs_64xx_init(struct mvs_info *mvi) tmp |= PCS_CMD_RST; tmp &= ~PCS_SELF_CLEAR; mw32(MVS_PCS, tmp); - /* interrupt coalescing may cause missing HW interrput in some case, - * and the max count is 0x1ff, while our max slot is 0x200, + /* + * the max count is 0x1ff, while our max slot is 0x200, * it will make count 0. */ tmp = 0; @@ -632,7 +624,6 @@ static void mvs_64xx_phy_work_around(struct mvs_info *mvi, int i) { u32 tmp; struct mvs_phy *phy = &mvi->phy[i]; - /* workaround for HW phy decoding error on 1.5g disk drive */ mvs_write_port_vsr_addr(mvi, i, VSR_PHY_MODE6); tmp = mvs_read_port_vsr_data(mvi, i); if (((phy->phy_status & PHY_NEG_SPP_PHYS_LINK_RATE_MASK) >> @@ -765,8 +756,8 @@ static void mvs_64xx_tune_interrupt(struct mvs_info *mvi, u32 time) { void __iomem *regs = mvi->regs; u32 tmp = 0; - /* interrupt coalescing may cause missing HW interrput in some case, - * and the max count is 0x1ff, while our max slot is 0x200, + /* + * the max count is 0x1ff, while our max slot is 0x200, * it will make count 0. */ if (time == 0) { diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c index 1276e494b868..f4a995c29eb1 100644 --- a/drivers/scsi/mvsas/mv_94xx.c +++ b/drivers/scsi/mvsas/mv_94xx.c @@ -460,13 +460,7 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi) mvs_update_phyinfo(mvi, i, 1); } - /* FIXME: update wide port bitmaps */ - /* little endian for open address and command table, etc. */ - /* - * it seems that ( from the spec ) turning on big-endian won't - * do us any good on big-endian machines, need further confirmation - */ cctl = mr32(MVS_CTL); cctl |= CCTL_ENDIAN_CMD; cctl &= ~CCTL_ENDIAN_OPEN; @@ -478,8 +472,8 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi) tmp |= PCS_CMD_RST; tmp &= ~PCS_SELF_CLEAR; mw32(MVS_PCS, tmp); - /* interrupt coalescing may cause missing HW interrput in some case, - * and the max count is 0x1ff, while our max slot is 0x200, + /* + * the max count is 0x1ff, while our max slot is 0x200, * it will make count 0. */ tmp = 0; @@ -488,6 +482,7 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi) else mw32(MVS_INT_COAL, MVS_CHIP_SLOT_SZ | COAL_EN); + /* default interrupt coalescing time is 128us */ tmp = 0x10000 | interrupt_coalescing; mw32(MVS_INT_COAL_TMOUT, tmp); @@ -745,7 +740,7 @@ static int mvs_94xx_oob_done(struct mvs_info *mvi, int i) { u32 phy_st; phy_st = mvs_read_phy_ctl(mvi, i); - if (phy_st & PHY_READY_MASK) /* phy ready */ + if (phy_st & PHY_READY_MASK) return 1; return 0; } @@ -770,7 +765,6 @@ static void mvs_94xx_get_att_identify_frame(struct mvs_info *mvi, int port_id, int i; u32 id_frame[7]; - /* mvs_hexdump(28, (u8 *)id_frame, 0); */ for (i = 0; i < 7; i++) { mvs_write_port_cfg_addr(mvi, port_id, CONFIG_ATT_ID_FRAME0 + i * 4); @@ -778,7 +772,6 @@ static void mvs_94xx_get_att_identify_frame(struct mvs_info *mvi, int port_id, mv_dprintk("94xx phy %d atta frame %d %x.\n", port_id + mvi->id * mvi->chip->n_phy, i, id_frame[i]); } - /* mvs_hexdump(28, (u8 *)id_frame, 0); */ memcpy(id, id_frame, 28); } @@ -962,8 +955,8 @@ static void mvs_94xx_tune_interrupt(struct mvs_info *mvi, u32 time) { void __iomem *regs = mvi->regs; u32 tmp = 0; - /* interrupt coalescing may cause missing HW interrput in some case, - * and the max count is 0x1ff, while our max slot is 0x200, + /* + * the max count is 0x1ff, while our max slot is 0x200, * it will make count 0. */ if (time == 0) { diff --git a/drivers/scsi/mvsas/mv_94xx.h b/drivers/scsi/mvsas/mv_94xx.h index d8c12e057ae8..8f7eb4f21140 100644 --- a/drivers/scsi/mvsas/mv_94xx.h +++ b/drivers/scsi/mvsas/mv_94xx.h @@ -121,18 +121,18 @@ enum pci_cfg_registers { /* SAS/SATA Vendor Specific Port Registers */ enum sas_sata_vsp_regs { - VSR_PHY_STAT = 0x00 * 4, /* Phy Status */ - VSR_PHY_MODE1 = 0x01 * 4, /* phy tx */ - VSR_PHY_MODE2 = 0x02 * 4, /* tx scc */ - VSR_PHY_MODE3 = 0x03 * 4, /* pll */ - VSR_PHY_MODE4 = 0x04 * 4, /* VCO */ - VSR_PHY_MODE5 = 0x05 * 4, /* Rx */ - VSR_PHY_MODE6 = 0x06 * 4, /* CDR */ - VSR_PHY_MODE7 = 0x07 * 4, /* Impedance */ - VSR_PHY_MODE8 = 0x08 * 4, /* Voltage */ - VSR_PHY_MODE9 = 0x09 * 4, /* Test */ - VSR_PHY_MODE10 = 0x0A * 4, /* Power */ - VSR_PHY_MODE11 = 0x0B * 4, /* Phy Mode */ + VSR_PHY_STAT = 0x00 * 4, /* Phy Interrupt Status */ + VSR_PHY_MODE1 = 0x01 * 4, /* phy Interrupt Enable */ + VSR_PHY_MODE2 = 0x02 * 4, /* Phy Configuration */ + VSR_PHY_MODE3 = 0x03 * 4, /* Phy Status */ + VSR_PHY_MODE4 = 0x04 * 4, /* Phy Counter 0 */ + VSR_PHY_MODE5 = 0x05 * 4, /* Phy Counter 1 */ + VSR_PHY_MODE6 = 0x06 * 4, /* Event Counter Control */ + VSR_PHY_MODE7 = 0x07 * 4, /* Event Counter Select */ + VSR_PHY_MODE8 = 0x08 * 4, /* Event Counter 0 */ + VSR_PHY_MODE9 = 0x09 * 4, /* Event Counter 1 */ + VSR_PHY_MODE10 = 0x0A * 4, /* Event Counter 2 */ + VSR_PHY_MODE11 = 0x0B * 4, /* Event Counter 3 */ VSR_PHY_ACT_LED = 0x0C * 4, /* Activity LED control */ VSR_PHY_FFE_CONTROL = 0x10C, diff --git a/drivers/scsi/mvsas/mv_chips.h b/drivers/scsi/mvsas/mv_chips.h index 0a11bc7174ac..bcc408042cee 100644 --- a/drivers/scsi/mvsas/mv_chips.h +++ b/drivers/scsi/mvsas/mv_chips.h @@ -164,7 +164,6 @@ static inline void __devinit mvs_phy_hacks(struct mvs_info *mvi) { u32 tmp; - /* workaround for SATA R-ERR, to ignore phy glitch */ tmp = mvs_cr32(mvi, CMD_PHY_TIMER); tmp &= ~(1 << 9); tmp |= (1 << 10); @@ -179,7 +178,6 @@ static inline void __devinit mvs_phy_hacks(struct mvs_info *mvi) tmp |= 0x3fff; mvs_cw32(mvi, CMD_SAS_CTL0, tmp); - /* workaround for WDTIMEOUT , set to 550 ms */ mvs_cw32(mvi, CMD_WD_TIMER, 0x7a0000); /* not to halt for different port op during wideport link change */ diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h index 1927e1bbb8eb..dec7cadb7485 100644 --- a/drivers/scsi/mvsas/mv_defs.h +++ b/drivers/scsi/mvsas/mv_defs.h @@ -160,7 +160,7 @@ enum hw_register_bits { TXQ_CMD_SSP = 1, /* SSP protocol */ TXQ_CMD_SMP = 2, /* SMP protocol */ TXQ_CMD_STP = 3, /* STP/SATA protocol */ - TXQ_CMD_SSP_FREE_LIST = 4, /* add to SSP targ free list */ + TXQ_CMD_SSP_FREE_LIST = 4, /* add to SSP target free list */ TXQ_CMD_SLOT_RESET = 7, /* reset command slot */ TXQ_MODE_I = (1U << 28), /* mode: 0=target,1=initiator */ TXQ_MODE_TARGET = 0, diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index b28ee5bd7eeb..cf4aaa9db5fe 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -405,7 +405,6 @@ err_out: return NULL; } -/* move to PCI layer or libata core? */ static int pci_go_64(struct pci_dev *pdev) { int rc; diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index 31ca8fe25cae..4958fefff365 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -102,7 +102,6 @@ struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev) } -/* FIXME */ int mvs_find_dev_phyno(struct domain_device *dev, int *phyno) { unsigned long i = 0, j = 0, n = 0, num = 0; @@ -177,7 +176,6 @@ void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard) } } -/* FIXME: locking? */ int mvs_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, void *funcdata) { @@ -504,11 +502,8 @@ static int mvs_task_prep_ata(struct mvs_info *mvi, flags |= MCH_ATAPI; } - /* FIXME: fill in port multiplier number */ - hdr->flags = cpu_to_le32(flags); - /* FIXME: the low order order 5 bits for the TAG if enable NCQ */ if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr_tag)) task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3); else @@ -552,9 +547,6 @@ static int mvs_task_prep_ata(struct mvs_info *mvi, buf_tmp_dma += i; /* region 4: status buffer (larger the PRD, smaller this buf) ****** */ - /* FIXME: probably unused, for SATA. kept here just in case - * we get a STP/SATA error information record - */ slot->response = buf_tmp; hdr->status_buf = cpu_to_le64(buf_tmp_dma); if (mvi->flags & MVF_FLAG_SOC) @@ -1126,7 +1118,6 @@ static void *mvs_get_d2h_reg(struct mvs_info *mvi, int i, void *buf) MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0); s[0] = cpu_to_le32(MVS_CHIP_DISP->read_port_cfg_data(mvi, i)); - /* Workaround: take some ATAPI devices for ATA */ if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01)) s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10); @@ -1433,7 +1424,6 @@ static void mvs_tmf_timedout(unsigned long data) complete(&task->completion); } -/* XXX */ #define MVS_TASK_TIMEOUT 20 static int mvs_exec_internal_tmf_task(struct domain_device *dev, void *parameter, u32 para_len, struct mvs_tmf_task *tmf) @@ -1577,7 +1567,6 @@ int mvs_I_T_nexus_reset(struct domain_device *dev) mv_printk("%s for device[%x]:rc= %d\n", __func__, mvi_dev->device_id, rc); - /* housekeeper */ spin_lock_irqsave(&mvi->lock, flags); mvs_release_task(mvi, dev); spin_unlock_irqrestore(&mvi->lock, flags); @@ -1681,7 +1670,6 @@ int mvs_abort_task(struct sas_task *task) } else if (task->task_proto & SAS_PROTOCOL_SATA || task->task_proto & SAS_PROTOCOL_STP) { - /* to do free register_set */ if (SATA_DEV == dev->dev_type) { struct mvs_slot_info *slot = task->lldd_task; u32 slot_idx = (u32)(slot - mvi->slot_info); @@ -1901,6 +1889,7 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags) return -1; } + /* when no device attaching, go ahead and complete by error handling*/ if (unlikely(!mvi_dev || flags)) { if (!mvi_dev) mv_dprintk("port has not device.\n"); @@ -2017,7 +2006,6 @@ void mvs_release_task(struct mvs_info *mvi, struct domain_device *dev) { int i, phyno[WIDE_PORT_MAX_PHY], num; - /* housekeeper */ num = mvs_find_dev_phyno(dev, phyno); for (i = 0; i < num; i++) mvs_do_release_task(mvi, phyno[i], dev);