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![Catalin Marinas](/assets/img/avatar_default.png)
The data in the cmd_block buffers may reach the main memory after the writel() to the device ports. This patch introduces two calls to wmb() to ensure the relative ordering. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Colin Tuckley <colin.tuckley@arm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
1407 lines
38 KiB
C
1407 lines
38 KiB
C
/*
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* sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
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*
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* Copyright 2005 Tejun Heo
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*
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* Based on preview driver from Silicon Image.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/gfp.h>
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#include <linux/pci.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.h>
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#include <linux/libata.h>
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#define DRV_NAME "sata_sil24"
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#define DRV_VERSION "1.1"
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/*
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* Port request block (PRB) 32 bytes
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*/
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struct sil24_prb {
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__le16 ctrl;
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__le16 prot;
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__le32 rx_cnt;
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u8 fis[6 * 4];
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};
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/*
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* Scatter gather entry (SGE) 16 bytes
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*/
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struct sil24_sge {
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__le64 addr;
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__le32 cnt;
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__le32 flags;
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};
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enum {
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SIL24_HOST_BAR = 0,
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SIL24_PORT_BAR = 2,
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/* sil24 fetches in chunks of 64bytes. The first block
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* contains the PRB and two SGEs. From the second block, it's
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* consisted of four SGEs and called SGT. Calculate the
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* number of SGTs that fit into one page.
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*/
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SIL24_PRB_SZ = sizeof(struct sil24_prb)
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+ 2 * sizeof(struct sil24_sge),
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SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ)
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/ (4 * sizeof(struct sil24_sge)),
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/* This will give us one unused SGEs for ATA. This extra SGE
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* will be used to store CDB for ATAPI devices.
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*/
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SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1,
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/*
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* Global controller registers (128 bytes @ BAR0)
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*/
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/* 32 bit regs */
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HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
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HOST_CTRL = 0x40,
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HOST_IRQ_STAT = 0x44,
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HOST_PHY_CFG = 0x48,
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HOST_BIST_CTRL = 0x50,
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HOST_BIST_PTRN = 0x54,
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HOST_BIST_STAT = 0x58,
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HOST_MEM_BIST_STAT = 0x5c,
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HOST_FLASH_CMD = 0x70,
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/* 8 bit regs */
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HOST_FLASH_DATA = 0x74,
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HOST_TRANSITION_DETECT = 0x75,
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HOST_GPIO_CTRL = 0x76,
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HOST_I2C_ADDR = 0x78, /* 32 bit */
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HOST_I2C_DATA = 0x7c,
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HOST_I2C_XFER_CNT = 0x7e,
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HOST_I2C_CTRL = 0x7f,
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/* HOST_SLOT_STAT bits */
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HOST_SSTAT_ATTN = (1 << 31),
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/* HOST_CTRL bits */
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HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
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HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
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HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
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HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
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HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
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HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */
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/*
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* Port registers
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* (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
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*/
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PORT_REGS_SIZE = 0x2000,
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PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */
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PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */
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PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
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PORT_PMP_STATUS = 0x0000, /* port device status offset */
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PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */
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PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */
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/* 32 bit regs */
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PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
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PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
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PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
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PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
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PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
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PORT_ACTIVATE_UPPER_ADDR= 0x101c,
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PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
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PORT_CMD_ERR = 0x1024, /* command error number */
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PORT_FIS_CFG = 0x1028,
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PORT_FIFO_THRES = 0x102c,
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/* 16 bit regs */
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PORT_DECODE_ERR_CNT = 0x1040,
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PORT_DECODE_ERR_THRESH = 0x1042,
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PORT_CRC_ERR_CNT = 0x1044,
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PORT_CRC_ERR_THRESH = 0x1046,
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PORT_HSHK_ERR_CNT = 0x1048,
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PORT_HSHK_ERR_THRESH = 0x104a,
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/* 32 bit regs */
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PORT_PHY_CFG = 0x1050,
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PORT_SLOT_STAT = 0x1800,
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PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
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PORT_CONTEXT = 0x1e04,
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PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
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PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
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PORT_SCONTROL = 0x1f00,
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PORT_SSTATUS = 0x1f04,
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PORT_SERROR = 0x1f08,
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PORT_SACTIVE = 0x1f0c,
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/* PORT_CTRL_STAT bits */
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PORT_CS_PORT_RST = (1 << 0), /* port reset */
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PORT_CS_DEV_RST = (1 << 1), /* device reset */
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PORT_CS_INIT = (1 << 2), /* port initialize */
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PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
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PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
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PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */
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PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
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PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */
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PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
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/* PORT_IRQ_STAT/ENABLE_SET/CLR */
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/* bits[11:0] are masked */
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PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
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PORT_IRQ_ERROR = (1 << 1), /* command execution error */
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PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
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PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
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PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
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PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
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PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
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PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
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PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
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PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
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PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
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PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
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DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
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PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
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PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY,
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/* bits[27:16] are unmasked (raw) */
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PORT_IRQ_RAW_SHIFT = 16,
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PORT_IRQ_MASKED_MASK = 0x7ff,
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PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
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/* ENABLE_SET/CLR specific, intr steering - 2 bit field */
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PORT_IRQ_STEER_SHIFT = 30,
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PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
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/* PORT_CMD_ERR constants */
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PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
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PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
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PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
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PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
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PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
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PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
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PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
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PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
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PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
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PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
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PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
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PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
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PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
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PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
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PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
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PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
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PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
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PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
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PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
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PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
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PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
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PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
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/* bits of PRB control field */
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PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
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PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
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PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
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PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
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PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
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/* PRB protocol field */
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PRB_PROT_PACKET = (1 << 0),
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PRB_PROT_TCQ = (1 << 1),
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PRB_PROT_NCQ = (1 << 2),
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PRB_PROT_READ = (1 << 3),
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PRB_PROT_WRITE = (1 << 4),
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PRB_PROT_TRANSPARENT = (1 << 5),
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/*
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* Other constants
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*/
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SGE_TRM = (1 << 31), /* Last SGE in chain */
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SGE_LNK = (1 << 30), /* linked list
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Points to SGT, not SGE */
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SGE_DRD = (1 << 29), /* discard data read (/dev/null)
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data address ignored */
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SIL24_MAX_CMDS = 31,
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/* board id */
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BID_SIL3124 = 0,
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BID_SIL3132 = 1,
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BID_SIL3131 = 2,
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/* host flags */
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SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
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ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
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ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
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ATA_FLAG_AN | ATA_FLAG_PMP,
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SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
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IRQ_STAT_4PORTS = 0xf,
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};
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struct sil24_ata_block {
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struct sil24_prb prb;
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struct sil24_sge sge[SIL24_MAX_SGE];
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};
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struct sil24_atapi_block {
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struct sil24_prb prb;
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u8 cdb[16];
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struct sil24_sge sge[SIL24_MAX_SGE];
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};
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union sil24_cmd_block {
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struct sil24_ata_block ata;
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struct sil24_atapi_block atapi;
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};
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static struct sil24_cerr_info {
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unsigned int err_mask, action;
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const char *desc;
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} sil24_cerr_db[] = {
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[0] = { AC_ERR_DEV, 0,
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"device error" },
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[PORT_CERR_DEV] = { AC_ERR_DEV, 0,
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"device error via D2H FIS" },
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[PORT_CERR_SDB] = { AC_ERR_DEV, 0,
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"device error via SDB FIS" },
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[PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
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"error in data FIS" },
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[PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET,
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"failed to transmit command FIS" },
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[PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET,
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"protocol mismatch" },
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[PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET,
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"data directon mismatch" },
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[PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
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"ran out of SGEs while writing" },
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[PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET,
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"ran out of SGEs while reading" },
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[PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET,
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"invalid data directon for ATAPI CDB" },
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[PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
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"SGT not on qword boundary" },
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[PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI target abort while fetching SGT" },
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[PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI master abort while fetching SGT" },
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[PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI parity error while fetching SGT" },
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[PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET,
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"PRB not on qword boundary" },
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[PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI target abort while fetching PRB" },
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[PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI master abort while fetching PRB" },
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[PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI parity error while fetching PRB" },
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[PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"undefined error while transferring data" },
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[PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI target abort while transferring data" },
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[PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI master abort while transferring data" },
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[PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET,
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"PCI parity error while transferring data" },
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[PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET,
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"FIS received while sending service FIS" },
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};
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/*
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* ap->private_data
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*
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* The preview driver always returned 0 for status. We emulate it
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* here from the previous interrupt.
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*/
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struct sil24_port_priv {
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union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
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dma_addr_t cmd_block_dma; /* DMA base addr for them */
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int do_port_rst;
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};
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static void sil24_dev_config(struct ata_device *dev);
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static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val);
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static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val);
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static int sil24_qc_defer(struct ata_queued_cmd *qc);
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static void sil24_qc_prep(struct ata_queued_cmd *qc);
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static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
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static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc);
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static void sil24_pmp_attach(struct ata_port *ap);
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static void sil24_pmp_detach(struct ata_port *ap);
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static void sil24_freeze(struct ata_port *ap);
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static void sil24_thaw(struct ata_port *ap);
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static int sil24_softreset(struct ata_link *link, unsigned int *class,
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unsigned long deadline);
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static int sil24_hardreset(struct ata_link *link, unsigned int *class,
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unsigned long deadline);
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static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
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unsigned long deadline);
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static void sil24_error_handler(struct ata_port *ap);
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static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
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static int sil24_port_start(struct ata_port *ap);
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static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
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#ifdef CONFIG_PM
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static int sil24_pci_device_resume(struct pci_dev *pdev);
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static int sil24_port_resume(struct ata_port *ap);
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#endif
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static const struct pci_device_id sil24_pci_tbl[] = {
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{ PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 },
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{ PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 },
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{ PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 },
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{ PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 },
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{ PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 },
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{ PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 },
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{ PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 },
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{ } /* terminate list */
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};
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static struct pci_driver sil24_pci_driver = {
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.name = DRV_NAME,
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.id_table = sil24_pci_tbl,
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.probe = sil24_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = sil24_pci_device_resume,
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#endif
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};
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static struct scsi_host_template sil24_sht = {
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ATA_NCQ_SHT(DRV_NAME),
|
|
.can_queue = SIL24_MAX_CMDS,
|
|
.sg_tablesize = SIL24_MAX_SGE,
|
|
.dma_boundary = ATA_DMA_BOUNDARY,
|
|
};
|
|
|
|
static struct ata_port_operations sil24_ops = {
|
|
.inherits = &sata_pmp_port_ops,
|
|
|
|
.qc_defer = sil24_qc_defer,
|
|
.qc_prep = sil24_qc_prep,
|
|
.qc_issue = sil24_qc_issue,
|
|
.qc_fill_rtf = sil24_qc_fill_rtf,
|
|
|
|
.freeze = sil24_freeze,
|
|
.thaw = sil24_thaw,
|
|
.softreset = sil24_softreset,
|
|
.hardreset = sil24_hardreset,
|
|
.pmp_softreset = sil24_softreset,
|
|
.pmp_hardreset = sil24_pmp_hardreset,
|
|
.error_handler = sil24_error_handler,
|
|
.post_internal_cmd = sil24_post_internal_cmd,
|
|
.dev_config = sil24_dev_config,
|
|
|
|
.scr_read = sil24_scr_read,
|
|
.scr_write = sil24_scr_write,
|
|
.pmp_attach = sil24_pmp_attach,
|
|
.pmp_detach = sil24_pmp_detach,
|
|
|
|
.port_start = sil24_port_start,
|
|
#ifdef CONFIG_PM
|
|
.port_resume = sil24_port_resume,
|
|
#endif
|
|
};
|
|
|
|
static int sata_sil24_msi; /* Disable MSI */
|
|
module_param_named(msi, sata_sil24_msi, bool, S_IRUGO);
|
|
MODULE_PARM_DESC(msi, "Enable MSI (Default: false)");
|
|
|
|
/*
|
|
* Use bits 30-31 of port_flags to encode available port numbers.
|
|
* Current maxium is 4.
|
|
*/
|
|
#define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
|
|
#define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
|
|
|
|
static const struct ata_port_info sil24_port_info[] = {
|
|
/* sil_3124 */
|
|
{
|
|
.flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
|
|
SIL24_FLAG_PCIX_IRQ_WOC,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA5,
|
|
.port_ops = &sil24_ops,
|
|
},
|
|
/* sil_3132 */
|
|
{
|
|
.flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA5,
|
|
.port_ops = &sil24_ops,
|
|
},
|
|
/* sil_3131/sil_3531 */
|
|
{
|
|
.flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA5,
|
|
.port_ops = &sil24_ops,
|
|
},
|
|
};
|
|
|
|
static int sil24_tag(int tag)
|
|
{
|
|
if (unlikely(ata_tag_internal(tag)))
|
|
return 0;
|
|
return tag;
|
|
}
|
|
|
|
static unsigned long sil24_port_offset(struct ata_port *ap)
|
|
{
|
|
return ap->port_no * PORT_REGS_SIZE;
|
|
}
|
|
|
|
static void __iomem *sil24_port_base(struct ata_port *ap)
|
|
{
|
|
return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap);
|
|
}
|
|
|
|
static void sil24_dev_config(struct ata_device *dev)
|
|
{
|
|
void __iomem *port = sil24_port_base(dev->link->ap);
|
|
|
|
if (dev->cdb_len == 16)
|
|
writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
|
|
else
|
|
writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
|
|
}
|
|
|
|
static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
struct sil24_prb __iomem *prb;
|
|
u8 fis[6 * 4];
|
|
|
|
prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
|
|
memcpy_fromio(fis, prb->fis, sizeof(fis));
|
|
ata_tf_from_fis(fis, tf);
|
|
}
|
|
|
|
static int sil24_scr_map[] = {
|
|
[SCR_CONTROL] = 0,
|
|
[SCR_STATUS] = 1,
|
|
[SCR_ERROR] = 2,
|
|
[SCR_ACTIVE] = 3,
|
|
};
|
|
|
|
static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
|
|
{
|
|
void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
|
|
|
|
if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
|
|
void __iomem *addr;
|
|
addr = scr_addr + sil24_scr_map[sc_reg] * 4;
|
|
*val = readl(scr_addr + sil24_scr_map[sc_reg] * 4);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
|
|
{
|
|
void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL;
|
|
|
|
if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
|
|
void __iomem *addr;
|
|
addr = scr_addr + sil24_scr_map[sc_reg] * 4;
|
|
writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void sil24_config_port(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
|
|
/* configure IRQ WoC */
|
|
if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
|
|
writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
|
|
else
|
|
writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
|
|
|
|
/* zero error counters. */
|
|
writew(0x8000, port + PORT_DECODE_ERR_THRESH);
|
|
writew(0x8000, port + PORT_CRC_ERR_THRESH);
|
|
writew(0x8000, port + PORT_HSHK_ERR_THRESH);
|
|
writew(0x0000, port + PORT_DECODE_ERR_CNT);
|
|
writew(0x0000, port + PORT_CRC_ERR_CNT);
|
|
writew(0x0000, port + PORT_HSHK_ERR_CNT);
|
|
|
|
/* always use 64bit activation */
|
|
writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
|
|
|
|
/* clear port multiplier enable and resume bits */
|
|
writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
|
|
}
|
|
|
|
static void sil24_config_pmp(struct ata_port *ap, int attached)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
|
|
if (attached)
|
|
writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT);
|
|
else
|
|
writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR);
|
|
}
|
|
|
|
static void sil24_clear_pmp(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
int i;
|
|
|
|
writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
|
|
|
|
for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
|
|
void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE;
|
|
|
|
writel(0, pmp_base + PORT_PMP_STATUS);
|
|
writel(0, pmp_base + PORT_PMP_QACTIVE);
|
|
}
|
|
}
|
|
|
|
static int sil24_init_port(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
u32 tmp;
|
|
|
|
/* clear PMP error status */
|
|
if (sata_pmp_attached(ap))
|
|
sil24_clear_pmp(ap);
|
|
|
|
writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
|
|
ata_wait_register(port + PORT_CTRL_STAT,
|
|
PORT_CS_INIT, PORT_CS_INIT, 10, 100);
|
|
tmp = ata_wait_register(port + PORT_CTRL_STAT,
|
|
PORT_CS_RDY, 0, 10, 100);
|
|
|
|
if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
|
|
pp->do_port_rst = 1;
|
|
ap->link.eh_context.i.action |= ATA_EH_RESET;
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
|
|
const struct ata_taskfile *tf,
|
|
int is_cmd, u32 ctrl,
|
|
unsigned long timeout_msec)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
|
|
dma_addr_t paddr = pp->cmd_block_dma;
|
|
u32 irq_enabled, irq_mask, irq_stat;
|
|
int rc;
|
|
|
|
prb->ctrl = cpu_to_le16(ctrl);
|
|
ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
|
|
|
|
/* temporarily plug completion and error interrupts */
|
|
irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
|
|
writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
|
|
|
|
/*
|
|
* The barrier is required to ensure that writes to cmd_block reach
|
|
* the memory before the write to PORT_CMD_ACTIVATE.
|
|
*/
|
|
wmb();
|
|
writel((u32)paddr, port + PORT_CMD_ACTIVATE);
|
|
writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
|
|
|
|
irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
|
|
irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
|
|
10, timeout_msec);
|
|
|
|
writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
|
|
irq_stat >>= PORT_IRQ_RAW_SHIFT;
|
|
|
|
if (irq_stat & PORT_IRQ_COMPLETE)
|
|
rc = 0;
|
|
else {
|
|
/* force port into known state */
|
|
sil24_init_port(ap);
|
|
|
|
if (irq_stat & PORT_IRQ_ERROR)
|
|
rc = -EIO;
|
|
else
|
|
rc = -EBUSY;
|
|
}
|
|
|
|
/* restore IRQ enabled */
|
|
writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int sil24_softreset(struct ata_link *link, unsigned int *class,
|
|
unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
int pmp = sata_srst_pmp(link);
|
|
unsigned long timeout_msec = 0;
|
|
struct ata_taskfile tf;
|
|
const char *reason;
|
|
int rc;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
/* put the port into known state */
|
|
if (sil24_init_port(ap)) {
|
|
reason = "port not ready";
|
|
goto err;
|
|
}
|
|
|
|
/* do SRST */
|
|
if (time_after(deadline, jiffies))
|
|
timeout_msec = jiffies_to_msecs(deadline - jiffies);
|
|
|
|
ata_tf_init(link->device, &tf); /* doesn't really matter */
|
|
rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
|
|
timeout_msec);
|
|
if (rc == -EBUSY) {
|
|
reason = "timeout";
|
|
goto err;
|
|
} else if (rc) {
|
|
reason = "SRST command error";
|
|
goto err;
|
|
}
|
|
|
|
sil24_read_tf(ap, 0, &tf);
|
|
*class = ata_dev_classify(&tf);
|
|
|
|
DPRINTK("EXIT, class=%u\n", *class);
|
|
return 0;
|
|
|
|
err:
|
|
ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
|
|
return -EIO;
|
|
}
|
|
|
|
static int sil24_hardreset(struct ata_link *link, unsigned int *class,
|
|
unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
void __iomem *port = sil24_port_base(ap);
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
int did_port_rst = 0;
|
|
const char *reason;
|
|
int tout_msec, rc;
|
|
u32 tmp;
|
|
|
|
retry:
|
|
/* Sometimes, DEV_RST is not enough to recover the controller.
|
|
* This happens often after PM DMA CS errata.
|
|
*/
|
|
if (pp->do_port_rst) {
|
|
ata_port_printk(ap, KERN_WARNING, "controller in dubious "
|
|
"state, performing PORT_RST\n");
|
|
|
|
writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
|
|
msleep(10);
|
|
writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
|
|
ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
|
|
10, 5000);
|
|
|
|
/* restore port configuration */
|
|
sil24_config_port(ap);
|
|
sil24_config_pmp(ap, ap->nr_pmp_links);
|
|
|
|
pp->do_port_rst = 0;
|
|
did_port_rst = 1;
|
|
}
|
|
|
|
/* sil24 does the right thing(tm) without any protection */
|
|
sata_set_spd(link);
|
|
|
|
tout_msec = 100;
|
|
if (ata_link_online(link))
|
|
tout_msec = 5000;
|
|
|
|
writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
|
|
tmp = ata_wait_register(port + PORT_CTRL_STAT,
|
|
PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10,
|
|
tout_msec);
|
|
|
|
/* SStatus oscillates between zero and valid status after
|
|
* DEV_RST, debounce it.
|
|
*/
|
|
rc = sata_link_debounce(link, sata_deb_timing_long, deadline);
|
|
if (rc) {
|
|
reason = "PHY debouncing failed";
|
|
goto err;
|
|
}
|
|
|
|
if (tmp & PORT_CS_DEV_RST) {
|
|
if (ata_link_offline(link))
|
|
return 0;
|
|
reason = "link not ready";
|
|
goto err;
|
|
}
|
|
|
|
/* Sil24 doesn't store signature FIS after hardreset, so we
|
|
* can't wait for BSY to clear. Some devices take a long time
|
|
* to get ready and those devices will choke if we don't wait
|
|
* for BSY clearance here. Tell libata to perform follow-up
|
|
* softreset.
|
|
*/
|
|
return -EAGAIN;
|
|
|
|
err:
|
|
if (!did_port_rst) {
|
|
pp->do_port_rst = 1;
|
|
goto retry;
|
|
}
|
|
|
|
ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
|
|
return -EIO;
|
|
}
|
|
|
|
static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
|
|
struct sil24_sge *sge)
|
|
{
|
|
struct scatterlist *sg;
|
|
struct sil24_sge *last_sge = NULL;
|
|
unsigned int si;
|
|
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
sge->addr = cpu_to_le64(sg_dma_address(sg));
|
|
sge->cnt = cpu_to_le32(sg_dma_len(sg));
|
|
sge->flags = 0;
|
|
|
|
last_sge = sge;
|
|
sge++;
|
|
}
|
|
|
|
last_sge->flags = cpu_to_le32(SGE_TRM);
|
|
}
|
|
|
|
static int sil24_qc_defer(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_link *link = qc->dev->link;
|
|
struct ata_port *ap = link->ap;
|
|
u8 prot = qc->tf.protocol;
|
|
|
|
/*
|
|
* There is a bug in the chip:
|
|
* Port LRAM Causes the PRB/SGT Data to be Corrupted
|
|
* If the host issues a read request for LRAM and SActive registers
|
|
* while active commands are available in the port, PRB/SGT data in
|
|
* the LRAM can become corrupted. This issue applies only when
|
|
* reading from, but not writing to, the LRAM.
|
|
*
|
|
* Therefore, reading LRAM when there is no particular error [and
|
|
* other commands may be outstanding] is prohibited.
|
|
*
|
|
* To avoid this bug there are two situations where a command must run
|
|
* exclusive of any other commands on the port:
|
|
*
|
|
* - ATAPI commands which check the sense data
|
|
* - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF
|
|
* set.
|
|
*
|
|
*/
|
|
int is_excl = (ata_is_atapi(prot) ||
|
|
(qc->flags & ATA_QCFLAG_RESULT_TF));
|
|
|
|
if (unlikely(ap->excl_link)) {
|
|
if (link == ap->excl_link) {
|
|
if (ap->nr_active_links)
|
|
return ATA_DEFER_PORT;
|
|
qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
|
|
} else
|
|
return ATA_DEFER_PORT;
|
|
} else if (unlikely(is_excl)) {
|
|
ap->excl_link = link;
|
|
if (ap->nr_active_links)
|
|
return ATA_DEFER_PORT;
|
|
qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
|
|
}
|
|
|
|
return ata_std_qc_defer(qc);
|
|
}
|
|
|
|
static void sil24_qc_prep(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
union sil24_cmd_block *cb;
|
|
struct sil24_prb *prb;
|
|
struct sil24_sge *sge;
|
|
u16 ctrl = 0;
|
|
|
|
cb = &pp->cmd_block[sil24_tag(qc->tag)];
|
|
|
|
if (!ata_is_atapi(qc->tf.protocol)) {
|
|
prb = &cb->ata.prb;
|
|
sge = cb->ata.sge;
|
|
if (ata_is_data(qc->tf.protocol)) {
|
|
u16 prot = 0;
|
|
ctrl = PRB_CTRL_PROTOCOL;
|
|
if (ata_is_ncq(qc->tf.protocol))
|
|
prot |= PRB_PROT_NCQ;
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE)
|
|
prot |= PRB_PROT_WRITE;
|
|
else
|
|
prot |= PRB_PROT_READ;
|
|
prb->prot = cpu_to_le16(prot);
|
|
}
|
|
} else {
|
|
prb = &cb->atapi.prb;
|
|
sge = cb->atapi.sge;
|
|
memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb));
|
|
memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
|
|
|
|
if (ata_is_data(qc->tf.protocol)) {
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE)
|
|
ctrl = PRB_CTRL_PACKET_WRITE;
|
|
else
|
|
ctrl = PRB_CTRL_PACKET_READ;
|
|
}
|
|
}
|
|
|
|
prb->ctrl = cpu_to_le16(ctrl);
|
|
ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis);
|
|
|
|
if (qc->flags & ATA_QCFLAG_DMAMAP)
|
|
sil24_fill_sg(qc, sge);
|
|
}
|
|
|
|
static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
void __iomem *port = sil24_port_base(ap);
|
|
unsigned int tag = sil24_tag(qc->tag);
|
|
dma_addr_t paddr;
|
|
void __iomem *activate;
|
|
|
|
paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
|
|
activate = port + PORT_CMD_ACTIVATE + tag * 8;
|
|
|
|
/*
|
|
* The barrier is required to ensure that writes to cmd_block reach
|
|
* the memory before the write to PORT_CMD_ACTIVATE.
|
|
*/
|
|
wmb();
|
|
writel((u32)paddr, activate);
|
|
writel((u64)paddr >> 32, activate + 4);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc)
|
|
{
|
|
sil24_read_tf(qc->ap, qc->tag, &qc->result_tf);
|
|
return true;
|
|
}
|
|
|
|
static void sil24_pmp_attach(struct ata_port *ap)
|
|
{
|
|
u32 *gscr = ap->link.device->gscr;
|
|
|
|
sil24_config_pmp(ap, 1);
|
|
sil24_init_port(ap);
|
|
|
|
if (sata_pmp_gscr_vendor(gscr) == 0x11ab &&
|
|
sata_pmp_gscr_devid(gscr) == 0x4140) {
|
|
ata_port_printk(ap, KERN_INFO,
|
|
"disabling NCQ support due to sil24-mv4140 quirk\n");
|
|
ap->flags &= ~ATA_FLAG_NCQ;
|
|
}
|
|
}
|
|
|
|
static void sil24_pmp_detach(struct ata_port *ap)
|
|
{
|
|
sil24_init_port(ap);
|
|
sil24_config_pmp(ap, 0);
|
|
|
|
ap->flags |= ATA_FLAG_NCQ;
|
|
}
|
|
|
|
static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
|
|
unsigned long deadline)
|
|
{
|
|
int rc;
|
|
|
|
rc = sil24_init_port(link->ap);
|
|
if (rc) {
|
|
ata_link_printk(link, KERN_ERR,
|
|
"hardreset failed (port not ready)\n");
|
|
return rc;
|
|
}
|
|
|
|
return sata_std_hardreset(link, class, deadline);
|
|
}
|
|
|
|
static void sil24_freeze(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
|
|
/* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear
|
|
* PORT_IRQ_ENABLE instead.
|
|
*/
|
|
writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
|
|
}
|
|
|
|
static void sil24_thaw(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
u32 tmp;
|
|
|
|
/* clear IRQ */
|
|
tmp = readl(port + PORT_IRQ_STAT);
|
|
writel(tmp, port + PORT_IRQ_STAT);
|
|
|
|
/* turn IRQ back on */
|
|
writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET);
|
|
}
|
|
|
|
static void sil24_error_intr(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
struct ata_queued_cmd *qc = NULL;
|
|
struct ata_link *link;
|
|
struct ata_eh_info *ehi;
|
|
int abort = 0, freeze = 0;
|
|
u32 irq_stat;
|
|
|
|
/* on error, we need to clear IRQ explicitly */
|
|
irq_stat = readl(port + PORT_IRQ_STAT);
|
|
writel(irq_stat, port + PORT_IRQ_STAT);
|
|
|
|
/* first, analyze and record host port events */
|
|
link = &ap->link;
|
|
ehi = &link->eh_info;
|
|
ata_ehi_clear_desc(ehi);
|
|
|
|
ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
|
|
|
|
if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
|
|
ata_ehi_push_desc(ehi, "SDB notify");
|
|
sata_async_notification(ap);
|
|
}
|
|
|
|
if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
|
|
ata_ehi_hotplugged(ehi);
|
|
ata_ehi_push_desc(ehi, "%s",
|
|
irq_stat & PORT_IRQ_PHYRDY_CHG ?
|
|
"PHY RDY changed" : "device exchanged");
|
|
freeze = 1;
|
|
}
|
|
|
|
if (irq_stat & PORT_IRQ_UNK_FIS) {
|
|
ehi->err_mask |= AC_ERR_HSM;
|
|
ehi->action |= ATA_EH_RESET;
|
|
ata_ehi_push_desc(ehi, "unknown FIS");
|
|
freeze = 1;
|
|
}
|
|
|
|
/* deal with command error */
|
|
if (irq_stat & PORT_IRQ_ERROR) {
|
|
struct sil24_cerr_info *ci = NULL;
|
|
unsigned int err_mask = 0, action = 0;
|
|
u32 context, cerr;
|
|
int pmp;
|
|
|
|
abort = 1;
|
|
|
|
/* DMA Context Switch Failure in Port Multiplier Mode
|
|
* errata. If we have active commands to 3 or more
|
|
* devices, any error condition on active devices can
|
|
* corrupt DMA context switching.
|
|
*/
|
|
if (ap->nr_active_links >= 3) {
|
|
ehi->err_mask |= AC_ERR_OTHER;
|
|
ehi->action |= ATA_EH_RESET;
|
|
ata_ehi_push_desc(ehi, "PMP DMA CS errata");
|
|
pp->do_port_rst = 1;
|
|
freeze = 1;
|
|
}
|
|
|
|
/* find out the offending link and qc */
|
|
if (sata_pmp_attached(ap)) {
|
|
context = readl(port + PORT_CONTEXT);
|
|
pmp = (context >> 5) & 0xf;
|
|
|
|
if (pmp < ap->nr_pmp_links) {
|
|
link = &ap->pmp_link[pmp];
|
|
ehi = &link->eh_info;
|
|
qc = ata_qc_from_tag(ap, link->active_tag);
|
|
|
|
ata_ehi_clear_desc(ehi);
|
|
ata_ehi_push_desc(ehi, "irq_stat 0x%08x",
|
|
irq_stat);
|
|
} else {
|
|
err_mask |= AC_ERR_HSM;
|
|
action |= ATA_EH_RESET;
|
|
freeze = 1;
|
|
}
|
|
} else
|
|
qc = ata_qc_from_tag(ap, link->active_tag);
|
|
|
|
/* analyze CMD_ERR */
|
|
cerr = readl(port + PORT_CMD_ERR);
|
|
if (cerr < ARRAY_SIZE(sil24_cerr_db))
|
|
ci = &sil24_cerr_db[cerr];
|
|
|
|
if (ci && ci->desc) {
|
|
err_mask |= ci->err_mask;
|
|
action |= ci->action;
|
|
if (action & ATA_EH_RESET)
|
|
freeze = 1;
|
|
ata_ehi_push_desc(ehi, "%s", ci->desc);
|
|
} else {
|
|
err_mask |= AC_ERR_OTHER;
|
|
action |= ATA_EH_RESET;
|
|
freeze = 1;
|
|
ata_ehi_push_desc(ehi, "unknown command error %d",
|
|
cerr);
|
|
}
|
|
|
|
/* record error info */
|
|
if (qc)
|
|
qc->err_mask |= err_mask;
|
|
else
|
|
ehi->err_mask |= err_mask;
|
|
|
|
ehi->action |= action;
|
|
|
|
/* if PMP, resume */
|
|
if (sata_pmp_attached(ap))
|
|
writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT);
|
|
}
|
|
|
|
/* freeze or abort */
|
|
if (freeze)
|
|
ata_port_freeze(ap);
|
|
else if (abort) {
|
|
if (qc)
|
|
ata_link_abort(qc->dev->link);
|
|
else
|
|
ata_port_abort(ap);
|
|
}
|
|
}
|
|
|
|
static inline void sil24_host_intr(struct ata_port *ap)
|
|
{
|
|
void __iomem *port = sil24_port_base(ap);
|
|
u32 slot_stat, qc_active;
|
|
int rc;
|
|
|
|
/* If PCIX_IRQ_WOC, there's an inherent race window between
|
|
* clearing IRQ pending status and reading PORT_SLOT_STAT
|
|
* which may cause spurious interrupts afterwards. This is
|
|
* unavoidable and much better than losing interrupts which
|
|
* happens if IRQ pending is cleared after reading
|
|
* PORT_SLOT_STAT.
|
|
*/
|
|
if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
|
|
writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
|
|
|
|
slot_stat = readl(port + PORT_SLOT_STAT);
|
|
|
|
if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
|
|
sil24_error_intr(ap);
|
|
return;
|
|
}
|
|
|
|
qc_active = slot_stat & ~HOST_SSTAT_ATTN;
|
|
rc = ata_qc_complete_multiple(ap, qc_active);
|
|
if (rc > 0)
|
|
return;
|
|
if (rc < 0) {
|
|
struct ata_eh_info *ehi = &ap->link.eh_info;
|
|
ehi->err_mask |= AC_ERR_HSM;
|
|
ehi->action |= ATA_EH_RESET;
|
|
ata_port_freeze(ap);
|
|
return;
|
|
}
|
|
|
|
/* spurious interrupts are expected if PCIX_IRQ_WOC */
|
|
if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
|
|
ata_port_printk(ap, KERN_INFO, "spurious interrupt "
|
|
"(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
|
|
slot_stat, ap->link.active_tag, ap->link.sactive);
|
|
}
|
|
|
|
static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
|
|
{
|
|
struct ata_host *host = dev_instance;
|
|
void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
|
|
unsigned handled = 0;
|
|
u32 status;
|
|
int i;
|
|
|
|
status = readl(host_base + HOST_IRQ_STAT);
|
|
|
|
if (status == 0xffffffff) {
|
|
printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
|
|
"PCI fault or device removal?\n");
|
|
goto out;
|
|
}
|
|
|
|
if (!(status & IRQ_STAT_4PORTS))
|
|
goto out;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
for (i = 0; i < host->n_ports; i++)
|
|
if (status & (1 << i)) {
|
|
sil24_host_intr(host->ports[i]);
|
|
handled++;
|
|
}
|
|
|
|
spin_unlock(&host->lock);
|
|
out:
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
static void sil24_error_handler(struct ata_port *ap)
|
|
{
|
|
struct sil24_port_priv *pp = ap->private_data;
|
|
|
|
if (sil24_init_port(ap))
|
|
ata_eh_freeze_port(ap);
|
|
|
|
sata_pmp_error_handler(ap);
|
|
|
|
pp->do_port_rst = 0;
|
|
}
|
|
|
|
static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
|
|
/* make DMA engine forget about the failed command */
|
|
if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap))
|
|
ata_eh_freeze_port(ap);
|
|
}
|
|
|
|
static int sil24_port_start(struct ata_port *ap)
|
|
{
|
|
struct device *dev = ap->host->dev;
|
|
struct sil24_port_priv *pp;
|
|
union sil24_cmd_block *cb;
|
|
size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS;
|
|
dma_addr_t cb_dma;
|
|
|
|
pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
|
|
if (!pp)
|
|
return -ENOMEM;
|
|
|
|
cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
|
|
if (!cb)
|
|
return -ENOMEM;
|
|
memset(cb, 0, cb_size);
|
|
|
|
pp->cmd_block = cb;
|
|
pp->cmd_block_dma = cb_dma;
|
|
|
|
ap->private_data = pp;
|
|
|
|
ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
|
|
ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sil24_init_controller(struct ata_host *host)
|
|
{
|
|
void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
|
|
u32 tmp;
|
|
int i;
|
|
|
|
/* GPIO off */
|
|
writel(0, host_base + HOST_FLASH_CMD);
|
|
|
|
/* clear global reset & mask interrupts during initialization */
|
|
writel(0, host_base + HOST_CTRL);
|
|
|
|
/* init ports */
|
|
for (i = 0; i < host->n_ports; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
void __iomem *port = sil24_port_base(ap);
|
|
|
|
|
|
/* Initial PHY setting */
|
|
writel(0x20c, port + PORT_PHY_CFG);
|
|
|
|
/* Clear port RST */
|
|
tmp = readl(port + PORT_CTRL_STAT);
|
|
if (tmp & PORT_CS_PORT_RST) {
|
|
writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
|
|
tmp = ata_wait_register(port + PORT_CTRL_STAT,
|
|
PORT_CS_PORT_RST,
|
|
PORT_CS_PORT_RST, 10, 100);
|
|
if (tmp & PORT_CS_PORT_RST)
|
|
dev_printk(KERN_ERR, host->dev,
|
|
"failed to clear port RST\n");
|
|
}
|
|
|
|
/* configure port */
|
|
sil24_config_port(ap);
|
|
}
|
|
|
|
/* Turn on interrupts */
|
|
writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
|
|
}
|
|
|
|
static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
extern int __MARKER__sil24_cmd_block_is_sized_wrongly;
|
|
static int printed_version;
|
|
struct ata_port_info pi = sil24_port_info[ent->driver_data];
|
|
const struct ata_port_info *ppi[] = { &pi, NULL };
|
|
void __iomem * const *iomap;
|
|
struct ata_host *host;
|
|
int rc;
|
|
u32 tmp;
|
|
|
|
/* cause link error if sil24_cmd_block is sized wrongly */
|
|
if (sizeof(union sil24_cmd_block) != PAGE_SIZE)
|
|
__MARKER__sil24_cmd_block_is_sized_wrongly = 1;
|
|
|
|
if (!printed_version++)
|
|
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
|
|
|
|
/* acquire resources */
|
|
rc = pcim_enable_device(pdev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = pcim_iomap_regions(pdev,
|
|
(1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR),
|
|
DRV_NAME);
|
|
if (rc)
|
|
return rc;
|
|
iomap = pcim_iomap_table(pdev);
|
|
|
|
/* apply workaround for completion IRQ loss on PCI-X errata */
|
|
if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) {
|
|
tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL);
|
|
if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
|
|
dev_printk(KERN_INFO, &pdev->dev,
|
|
"Applying completion IRQ loss on PCI-X "
|
|
"errata fix\n");
|
|
else
|
|
pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
|
|
}
|
|
|
|
/* allocate and fill host */
|
|
host = ata_host_alloc_pinfo(&pdev->dev, ppi,
|
|
SIL24_FLAG2NPORTS(ppi[0]->flags));
|
|
if (!host)
|
|
return -ENOMEM;
|
|
host->iomap = iomap;
|
|
|
|
/* configure and activate the device */
|
|
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
|
|
if (rc) {
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"64-bit DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
}
|
|
} else {
|
|
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"32-bit DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"32-bit consistent DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/* Set max read request size to 4096. This slightly increases
|
|
* write throughput for pci-e variants.
|
|
*/
|
|
pcie_set_readrq(pdev, 4096);
|
|
|
|
sil24_init_controller(host);
|
|
|
|
if (sata_sil24_msi && !pci_enable_msi(pdev)) {
|
|
dev_printk(KERN_INFO, &pdev->dev, "Using MSI\n");
|
|
pci_intx(pdev, 0);
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
|
|
&sil24_sht);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int sil24_pci_device_resume(struct pci_dev *pdev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
|
|
int rc;
|
|
|
|
rc = ata_pci_device_do_resume(pdev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
|
|
writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL);
|
|
|
|
sil24_init_controller(host);
|
|
|
|
ata_host_resume(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sil24_port_resume(struct ata_port *ap)
|
|
{
|
|
sil24_config_pmp(ap, ap->nr_pmp_links);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int __init sil24_init(void)
|
|
{
|
|
return pci_register_driver(&sil24_pci_driver);
|
|
}
|
|
|
|
static void __exit sil24_exit(void)
|
|
{
|
|
pci_unregister_driver(&sil24_pci_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Tejun Heo");
|
|
MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
|
|
|
|
module_init(sil24_init);
|
|
module_exit(sil24_exit);
|