linux-sg2042/drivers/ata/sata_fsl.c

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/*
* drivers/ata/sata_fsl.c
*
* Freescale 3.0Gbps SATA device driver
*
* Author: Ashish Kalra <ashish.kalra@freescale.com>
* Li Yang <leoli@freescale.com>
*
* Copyright (c) 2006-2007, 2011-2012 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include <asm/io.h>
#include <linux/of_platform.h>
static unsigned int intr_coalescing_count;
module_param(intr_coalescing_count, int, S_IRUGO);
MODULE_PARM_DESC(intr_coalescing_count,
"INT coalescing count threshold (1..31)");
static unsigned int intr_coalescing_ticks;
module_param(intr_coalescing_ticks, int, S_IRUGO);
MODULE_PARM_DESC(intr_coalescing_ticks,
"INT coalescing timer threshold in AHB ticks");
/* Controller information */
enum {
SATA_FSL_QUEUE_DEPTH = 16,
SATA_FSL_MAX_PRD = 63,
SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1,
SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */
SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
ATA_FLAG_PMP | ATA_FLAG_NCQ | ATA_FLAG_AN),
SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH,
SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */
SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE),
/*
* SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and
* chained indirect PRDEs up to a max count of 63.
* We are allocating an array of 63 PRDEs contiguously, but PRDE#15 will
* be setup as an indirect descriptor, pointing to it's next
* (contiguous) PRDE. Though chained indirect PRDE arrays are
* supported,it will be more efficient to use a direct PRDT and
* a single chain/link to indirect PRDE array/PRDT.
*/
SATA_FSL_CMD_DESC_CFIS_SZ = 32,
SATA_FSL_CMD_DESC_SFIS_SZ = 32,
SATA_FSL_CMD_DESC_ACMD_SZ = 16,
SATA_FSL_CMD_DESC_RSRVD = 16,
SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ +
SATA_FSL_CMD_DESC_SFIS_SZ +
SATA_FSL_CMD_DESC_ACMD_SZ +
SATA_FSL_CMD_DESC_RSRVD +
SATA_FSL_MAX_PRD * 16),
SATA_FSL_CMD_DESC_OFFSET_TO_PRDT =
(SATA_FSL_CMD_DESC_CFIS_SZ +
SATA_FSL_CMD_DESC_SFIS_SZ +
SATA_FSL_CMD_DESC_ACMD_SZ +
SATA_FSL_CMD_DESC_RSRVD),
SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS),
SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE +
SATA_FSL_CMD_DESC_AR_SZ),
/*
* MPC8315 has two SATA controllers, SATA1 & SATA2
* (one port per controller)
* MPC837x has 2/4 controllers, one port per controller
*/
SATA_FSL_MAX_PORTS = 1,
SATA_FSL_IRQ_FLAG = IRQF_SHARED,
};
/*
* Interrupt Coalescing Control Register bitdefs */
enum {
ICC_MIN_INT_COUNT_THRESHOLD = 1,
ICC_MAX_INT_COUNT_THRESHOLD = ((1 << 5) - 1),
ICC_MIN_INT_TICKS_THRESHOLD = 0,
ICC_MAX_INT_TICKS_THRESHOLD = ((1 << 19) - 1),
ICC_SAFE_INT_TICKS = 1,
};
/*
* Host Controller command register set - per port
*/
enum {
CQ = 0,
CA = 8,
CC = 0x10,
CE = 0x18,
DE = 0x20,
CHBA = 0x24,
HSTATUS = 0x28,
HCONTROL = 0x2C,
CQPMP = 0x30,
SIGNATURE = 0x34,
ICC = 0x38,
/*
* Host Status Register (HStatus) bitdefs
*/
ONLINE = (1 << 31),
GOING_OFFLINE = (1 << 30),
BIST_ERR = (1 << 29),
FATAL_ERR_HC_MASTER_ERR = (1 << 18),
FATAL_ERR_PARITY_ERR_TX = (1 << 17),
FATAL_ERR_PARITY_ERR_RX = (1 << 16),
FATAL_ERR_DATA_UNDERRUN = (1 << 13),
FATAL_ERR_DATA_OVERRUN = (1 << 12),
FATAL_ERR_CRC_ERR_TX = (1 << 11),
FATAL_ERR_CRC_ERR_RX = (1 << 10),
FATAL_ERR_FIFO_OVRFL_TX = (1 << 9),
FATAL_ERR_FIFO_OVRFL_RX = (1 << 8),
FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR |
FATAL_ERR_PARITY_ERR_TX |
FATAL_ERR_PARITY_ERR_RX |
FATAL_ERR_DATA_UNDERRUN |
FATAL_ERR_DATA_OVERRUN |
FATAL_ERR_CRC_ERR_TX |
FATAL_ERR_CRC_ERR_RX |
FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX,
INT_ON_FATAL_ERR = (1 << 5),
INT_ON_PHYRDY_CHG = (1 << 4),
INT_ON_SIGNATURE_UPDATE = (1 << 3),
INT_ON_SNOTIFY_UPDATE = (1 << 2),
INT_ON_SINGL_DEVICE_ERR = (1 << 1),
INT_ON_CMD_COMPLETE = 1,
INT_ON_ERROR = INT_ON_FATAL_ERR | INT_ON_SNOTIFY_UPDATE |
INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR,
/*
* Host Control Register (HControl) bitdefs
*/
HCONTROL_ONLINE_PHY_RST = (1 << 31),
HCONTROL_FORCE_OFFLINE = (1 << 30),
HCONTROL_LEGACY = (1 << 28),
HCONTROL_PARITY_PROT_MOD = (1 << 14),
HCONTROL_DPATH_PARITY = (1 << 12),
HCONTROL_SNOOP_ENABLE = (1 << 10),
HCONTROL_PMP_ATTACHED = (1 << 9),
HCONTROL_COPYOUT_STATFIS = (1 << 8),
IE_ON_FATAL_ERR = (1 << 5),
IE_ON_PHYRDY_CHG = (1 << 4),
IE_ON_SIGNATURE_UPDATE = (1 << 3),
IE_ON_SNOTIFY_UPDATE = (1 << 2),
IE_ON_SINGL_DEVICE_ERR = (1 << 1),
IE_ON_CMD_COMPLETE = 1,
DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG |
IE_ON_SIGNATURE_UPDATE | IE_ON_SNOTIFY_UPDATE |
IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE,
EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31),
DATA_SNOOP_ENABLE_V1 = (1 << 22),
DATA_SNOOP_ENABLE_V2 = (1 << 28),
};
/*
* SATA Superset Registers
*/
enum {
SSTATUS = 0,
SERROR = 4,
SCONTROL = 8,
SNOTIFY = 0xC,
};
/*
* Control Status Register Set
*/
enum {
TRANSCFG = 0,
TRANSSTATUS = 4,
LINKCFG = 8,
LINKCFG1 = 0xC,
LINKCFG2 = 0x10,
LINKSTATUS = 0x14,
LINKSTATUS1 = 0x18,
PHYCTRLCFG = 0x1C,
COMMANDSTAT = 0x20,
};
/* TRANSCFG (transport-layer) configuration control */
enum {
TRANSCFG_RX_WATER_MARK = (1 << 4),
};
/* PHY (link-layer) configuration control */
enum {
PHY_BIST_ENABLE = 0x01,
};
/*
* Command Header Table entry, i.e, command slot
* 4 Dwords per command slot, command header size == 64 Dwords.
*/
struct cmdhdr_tbl_entry {
u32 cda;
u32 prde_fis_len;
u32 ttl;
u32 desc_info;
};
/*
* Description information bitdefs
*/
enum {
CMD_DESC_RES = (1 << 11),
VENDOR_SPECIFIC_BIST = (1 << 10),
CMD_DESC_SNOOP_ENABLE = (1 << 9),
FPDMA_QUEUED_CMD = (1 << 8),
SRST_CMD = (1 << 7),
BIST = (1 << 6),
ATAPI_CMD = (1 << 5),
};
/*
* Command Descriptor
*/
struct command_desc {
u8 cfis[8 * 4];
u8 sfis[8 * 4];
u8 acmd[4 * 4];
u8 fill[4 * 4];
u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4];
u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4];
};
/*
* Physical region table descriptor(PRD)
*/
struct prde {
u32 dba;
u8 fill[2 * 4];
u32 ddc_and_ext;
};
/*
* ata_port private data
* This is our per-port instance data.
*/
struct sata_fsl_port_priv {
struct cmdhdr_tbl_entry *cmdslot;
dma_addr_t cmdslot_paddr;
struct command_desc *cmdentry;
dma_addr_t cmdentry_paddr;
};
/*
* ata_port->host_set private data
*/
struct sata_fsl_host_priv {
void __iomem *hcr_base;
void __iomem *ssr_base;
void __iomem *csr_base;
int irq;
int data_snoop;
struct device_attribute intr_coalescing;
};
static void fsl_sata_set_irq_coalescing(struct ata_host *host,
unsigned int count, unsigned int ticks)
{
struct sata_fsl_host_priv *host_priv = host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
if (count > ICC_MAX_INT_COUNT_THRESHOLD)
count = ICC_MAX_INT_COUNT_THRESHOLD;
else if (count < ICC_MIN_INT_COUNT_THRESHOLD)
count = ICC_MIN_INT_COUNT_THRESHOLD;
if (ticks > ICC_MAX_INT_TICKS_THRESHOLD)
ticks = ICC_MAX_INT_TICKS_THRESHOLD;
else if ((ICC_MIN_INT_TICKS_THRESHOLD == ticks) &&
(count > ICC_MIN_INT_COUNT_THRESHOLD))
ticks = ICC_SAFE_INT_TICKS;
spin_lock(&host->lock);
iowrite32((count << 24 | ticks), hcr_base + ICC);
intr_coalescing_count = count;
intr_coalescing_ticks = ticks;
spin_unlock(&host->lock);
DPRINTK("intrrupt coalescing, count = 0x%x, ticks = %x\n",
intr_coalescing_count, intr_coalescing_ticks);
DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n",
hcr_base, ioread32(hcr_base + ICC));
}
static ssize_t fsl_sata_intr_coalescing_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d %d\n",
intr_coalescing_count, intr_coalescing_ticks);
}
static ssize_t fsl_sata_intr_coalescing_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned int coalescing_count, coalescing_ticks;
if (sscanf(buf, "%d%d",
&coalescing_count,
&coalescing_ticks) != 2) {
printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
return -EINVAL;
}
fsl_sata_set_irq_coalescing(dev_get_drvdata(dev),
coalescing_count, coalescing_ticks);
return strlen(buf);
}
static inline unsigned int sata_fsl_tag(unsigned int tag,
void __iomem *hcr_base)
{
/* We let libATA core do actual (queue) tag allocation */
/* all non NCQ/queued commands should have tag#0 */
if (ata_tag_internal(tag)) {
DPRINTK("mapping internal cmds to tag#0\n");
return 0;
}
if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) {
DPRINTK("tag %d invalid : out of range\n", tag);
return 0;
}
if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) {
DPRINTK("tag %d invalid : in use!!\n", tag);
return 0;
}
return tag;
}
static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp,
unsigned int tag, u32 desc_info,
u32 data_xfer_len, u8 num_prde,
u8 fis_len)
{
dma_addr_t cmd_descriptor_address;
cmd_descriptor_address = pp->cmdentry_paddr +
tag * SATA_FSL_CMD_DESC_SIZE;
/* NOTE: both data_xfer_len & fis_len are Dword counts */
pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address);
pp->cmdslot[tag].prde_fis_len =
cpu_to_le32((num_prde << 16) | (fis_len << 2));
pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03);
pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F));
VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n",
pp->cmdslot[tag].cda,
pp->cmdslot[tag].prde_fis_len,
pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info);
}
static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc,
u32 *ttl, dma_addr_t cmd_desc_paddr,
int data_snoop)
{
struct scatterlist *sg;
unsigned int num_prde = 0;
u32 ttl_dwords = 0;
/*
* NOTE : direct & indirect prdt's are contiguously allocated
*/
struct prde *prd = (struct prde *)&((struct command_desc *)
cmd_desc)->prdt;
struct prde *prd_ptr_to_indirect_ext = NULL;
unsigned indirect_ext_segment_sz = 0;
dma_addr_t indirect_ext_segment_paddr;
unsigned int si;
VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd);
indirect_ext_segment_paddr = cmd_desc_paddr +
SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16;
for_each_sg(qc->sg, sg, qc->n_elem, si) {
dma_addr_t sg_addr = sg_dma_address(sg);
u32 sg_len = sg_dma_len(sg);
VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%llx, sg_len = %d\n",
(unsigned long long)sg_addr, sg_len);
/* warn if each s/g element is not dword aligned */
if (unlikely(sg_addr & 0x03))
ata_port_err(qc->ap, "s/g addr unaligned : 0x%llx\n",
(unsigned long long)sg_addr);
if (unlikely(sg_len & 0x03))
ata_port_err(qc->ap, "s/g len unaligned : 0x%x\n",
sg_len);
if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) &&
sg_next(sg) != NULL) {
VPRINTK("setting indirect prde\n");
prd_ptr_to_indirect_ext = prd;
prd->dba = cpu_to_le32(indirect_ext_segment_paddr);
indirect_ext_segment_sz = 0;
++prd;
++num_prde;
}
ttl_dwords += sg_len;
prd->dba = cpu_to_le32(sg_addr);
prd->ddc_and_ext = cpu_to_le32(data_snoop | (sg_len & ~0x03));
VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n",
ttl_dwords, prd->dba, prd->ddc_and_ext);
++num_prde;
++prd;
if (prd_ptr_to_indirect_ext)
indirect_ext_segment_sz += sg_len;
}
if (prd_ptr_to_indirect_ext) {
/* set indirect extension flag along with indirect ext. size */
prd_ptr_to_indirect_ext->ddc_and_ext =
cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG |
data_snoop |
(indirect_ext_segment_sz & ~0x03)));
}
*ttl = ttl_dwords;
return num_prde;
}
static void sata_fsl_qc_prep(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct sata_fsl_port_priv *pp = ap->private_data;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
struct command_desc *cd;
u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE;
u32 num_prde = 0;
u32 ttl_dwords = 0;
dma_addr_t cd_paddr;
cd = (struct command_desc *)pp->cmdentry + tag;
cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE;
ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *) &cd->cfis);
VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n",
cd->cfis[0], cd->cfis[1], cd->cfis[2]);
if (qc->tf.protocol == ATA_PROT_NCQ) {
VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n",
cd->cfis[3], cd->cfis[11]);
}
/* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */
if (ata_is_atapi(qc->tf.protocol)) {
desc_info |= ATAPI_CMD;
memset((void *)&cd->acmd, 0, 32);
memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len);
}
if (qc->flags & ATA_QCFLAG_DMAMAP)
num_prde = sata_fsl_fill_sg(qc, (void *)cd,
&ttl_dwords, cd_paddr,
host_priv->data_snoop);
if (qc->tf.protocol == ATA_PROT_NCQ)
desc_info |= FPDMA_QUEUED_CMD;
sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords,
num_prde, 5);
VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n",
desc_info, ttl_dwords, num_prde);
}
static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n",
ioread32(CQ + hcr_base),
ioread32(CA + hcr_base),
ioread32(CE + hcr_base), ioread32(CC + hcr_base));
iowrite32(qc->dev->link->pmp, CQPMP + hcr_base);
/* Simply queue command to the controller/device */
iowrite32(1 << tag, CQ + hcr_base);
VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n",
tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base));
VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n",
ioread32(CE + hcr_base),
ioread32(DE + hcr_base),
ioread32(CC + hcr_base),
ioread32(COMMANDSTAT + host_priv->csr_base));
return 0;
}
static bool sata_fsl_qc_fill_rtf(struct ata_queued_cmd *qc)
{
struct sata_fsl_port_priv *pp = qc->ap->private_data;
struct sata_fsl_host_priv *host_priv = qc->ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
unsigned int tag = sata_fsl_tag(qc->tag, hcr_base);
struct command_desc *cd;
cd = pp->cmdentry + tag;
ata_tf_from_fis(cd->sfis, &qc->result_tf);
return true;
}
static int sata_fsl_scr_write(struct ata_link *link,
unsigned int sc_reg_in, u32 val)
{
struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
void __iomem *ssr_base = host_priv->ssr_base;
unsigned int sc_reg;
switch (sc_reg_in) {
case SCR_STATUS:
case SCR_ERROR:
case SCR_CONTROL:
case SCR_ACTIVE:
sc_reg = sc_reg_in;
break;
default:
return -EINVAL;
}
VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg);
iowrite32(val, ssr_base + (sc_reg * 4));
return 0;
}
static int sata_fsl_scr_read(struct ata_link *link,
unsigned int sc_reg_in, u32 *val)
{
struct sata_fsl_host_priv *host_priv = link->ap->host->private_data;
void __iomem *ssr_base = host_priv->ssr_base;
unsigned int sc_reg;
switch (sc_reg_in) {
case SCR_STATUS:
case SCR_ERROR:
case SCR_CONTROL:
case SCR_ACTIVE:
sc_reg = sc_reg_in;
break;
default:
return -EINVAL;
}
VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg);
*val = ioread32(ssr_base + (sc_reg * 4));
return 0;
}
static void sata_fsl_freeze(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n",
ioread32(CQ + hcr_base),
ioread32(CA + hcr_base),
ioread32(CE + hcr_base), ioread32(DE + hcr_base));
VPRINTK("CmdStat = 0x%x\n",
ioread32(host_priv->csr_base + COMMANDSTAT));
/* disable interrupts on the controller/port */
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n",
ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
}
static void sata_fsl_thaw(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
/* ack. any pending IRQs for this controller/port */
temp = ioread32(hcr_base + HSTATUS);
VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F));
if (temp & 0x3F)
iowrite32((temp & 0x3F), hcr_base + HSTATUS);
/* enable interrupts on the controller/port */
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n",
ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS));
}
static void sata_fsl_pmp_attach(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp | HCONTROL_PMP_ATTACHED), hcr_base + HCONTROL);
}
static void sata_fsl_pmp_detach(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
temp = ioread32(hcr_base + HCONTROL);
temp &= ~HCONTROL_PMP_ATTACHED;
iowrite32(temp, hcr_base + HCONTROL);
/* enable interrupts on the controller/port */
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL);
}
static int sata_fsl_port_start(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct sata_fsl_port_priv *pp;
void *mem;
dma_addr_t mem_dma;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
pp = kzalloc(sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma,
GFP_KERNEL);
if (!mem) {
kfree(pp);
return -ENOMEM;
}
memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ);
pp->cmdslot = mem;
pp->cmdslot_paddr = mem_dma;
mem += SATA_FSL_CMD_SLOT_SIZE;
mem_dma += SATA_FSL_CMD_SLOT_SIZE;
pp->cmdentry = mem;
pp->cmdentry_paddr = mem_dma;
ap->private_data = pp;
VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n",
pp->cmdslot_paddr, pp->cmdentry_paddr);
/* Now, update the CHBA register in host controller cmd register set */
iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
/*
* Now, we can bring the controller on-line & also initiate
* the COMINIT sequence, we simply return here and the boot-probing
* & device discovery process is re-initiated by libATA using a
* Softreset EH (dummy) session. Hence, boot probing and device
* discovey will be part of sata_fsl_softreset() callback.
*/
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL);
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA));
#ifdef CONFIG_MPC8315_DS
/*
* Workaround for 8315DS board 3gbps link-up issue,
* currently limit SATA port to GEN1 speed
*/
sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
temp &= ~(0xF << 4);
temp |= (0x1 << 4);
sata_fsl_scr_write(&ap->link, SCR_CONTROL, temp);
sata_fsl_scr_read(&ap->link, SCR_CONTROL, &temp);
dev_warn(dev, "scr_control, speed limited to %x\n", temp);
#endif
return 0;
}
static void sata_fsl_port_stop(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct sata_fsl_port_priv *pp = ap->private_data;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
/*
* Force host controller to go off-line, aborting current operations
*/
temp = ioread32(hcr_base + HCONTROL);
temp &= ~HCONTROL_ONLINE_PHY_RST;
temp |= HCONTROL_FORCE_OFFLINE;
iowrite32(temp, hcr_base + HCONTROL);
/* Poll for controller to go offline - should happen immediately */
ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
ap->private_data = NULL;
dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
pp->cmdslot, pp->cmdslot_paddr);
kfree(pp);
}
static unsigned int sata_fsl_dev_classify(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
struct ata_taskfile tf;
u32 temp;
temp = ioread32(hcr_base + SIGNATURE);
VPRINTK("raw sig = 0x%x\n", temp);
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
tf.lbah = (temp >> 24) & 0xff;
tf.lbam = (temp >> 16) & 0xff;
tf.lbal = (temp >> 8) & 0xff;
tf.nsect = temp & 0xff;
return ata_dev_classify(&tf);
}
static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
int i = 0;
unsigned long start_jiffies;
DPRINTK("in xx_hardreset\n");
try_offline_again:
/*
* Force host controller to go off-line, aborting current operations
*/
temp = ioread32(hcr_base + HCONTROL);
temp &= ~HCONTROL_ONLINE_PHY_RST;
iowrite32(temp, hcr_base + HCONTROL);
/* Poll for controller to go offline */
temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE,
1, 500);
if (temp & ONLINE) {
ata_port_err(ap, "Hardreset failed, not off-lined %d\n", i);
/*
* Try to offline controller atleast twice
*/
i++;
if (i == 2)
goto err;
else
goto try_offline_again;
}
DPRINTK("hardreset, controller off-lined\n");
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
/*
* PHY reset should remain asserted for atleast 1ms
*/
ata_msleep(ap, 1);
/*
* Now, bring the host controller online again, this can take time
* as PHY reset and communication establishment, 1st D2H FIS and
* device signature update is done, on safe side assume 500ms
* NOTE : Host online status may be indicated immediately!!
*/
temp = ioread32(hcr_base + HCONTROL);
temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE);
temp |= HCONTROL_PMP_ATTACHED;
iowrite32(temp, hcr_base + HCONTROL);
temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500);
if (!(temp & ONLINE)) {
ata_port_err(ap, "Hardreset failed, not on-lined\n");
goto err;
}
DPRINTK("hardreset, controller off-lined & on-lined\n");
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
/*
* First, wait for the PHYRDY change to occur before waiting for
* the signature, and also verify if SStatus indicates device
* presence
*/
temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500);
if ((!(temp & 0x10)) || ata_link_offline(link)) {
ata_port_warn(ap, "No Device OR PHYRDY change,Hstatus = 0x%x\n",
ioread32(hcr_base + HSTATUS));
*class = ATA_DEV_NONE;
return 0;
}
/*
* Wait for the first D2H from device,i.e,signature update notification
*/
start_jiffies = jiffies;
temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10,
500, jiffies_to_msecs(deadline - start_jiffies));
if ((temp & 0xFF) != 0x18) {
ata_port_warn(ap, "No Signature Update\n");
*class = ATA_DEV_NONE;
goto do_followup_srst;
} else {
ata_port_info(ap, "Signature Update detected @ %d msecs\n",
jiffies_to_msecs(jiffies - start_jiffies));
*class = sata_fsl_dev_classify(ap);
return 0;
}
do_followup_srst:
/*
* request libATA to perform follow-up softreset
*/
return -EAGAIN;
err:
return -EIO;
}
static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct sata_fsl_port_priv *pp = ap->private_data;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
int pmp = sata_srst_pmp(link);
u32 temp;
struct ata_taskfile tf;
u8 *cfis;
u32 Serror;
DPRINTK("in xx_softreset\n");
if (ata_link_offline(link)) {
DPRINTK("PHY reports no device\n");
*class = ATA_DEV_NONE;
return 0;
}
/*
* Send a device reset (SRST) explicitly on command slot #0
* Check : will the command queue (reg) be cleared during offlining ??
* Also we will be online only if Phy commn. has been established
* and device presence has been detected, therefore if we have
* reached here, we can send a command to the target device
*/
DPRINTK("Sending SRST/device reset\n");
ata_tf_init(link->device, &tf);
cfis = (u8 *) &pp->cmdentry->cfis;
/* device reset/SRST is a control register update FIS, uses tag0 */
sata_fsl_setup_cmd_hdr_entry(pp, 0,
SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5);
tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */
ata_tf_to_fis(&tf, pmp, 0, cfis);
DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n",
cfis[0], cfis[1], cfis[2], cfis[3]);
/*
* Queue SRST command to the controller/device, ensure that no
* other commands are active on the controller/device
*/
DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n",
ioread32(CQ + hcr_base),
ioread32(CA + hcr_base), ioread32(CC + hcr_base));
iowrite32(0xFFFF, CC + hcr_base);
if (pmp != SATA_PMP_CTRL_PORT)
iowrite32(pmp, CQPMP + hcr_base);
iowrite32(1, CQ + hcr_base);
temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000);
if (temp & 0x1) {
ata_port_warn(ap, "ATA_SRST issue failed\n");
DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n",
ioread32(CQ + hcr_base),
ioread32(CA + hcr_base), ioread32(CC + hcr_base));
sata_fsl_scr_read(&ap->link, SCR_ERROR, &Serror);
DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
DPRINTK("Serror = 0x%x\n", Serror);
goto err;
}
ata_msleep(ap, 1);
/*
* SATA device enters reset state after receiving a Control register
* FIS with SRST bit asserted and it awaits another H2D Control reg.
* FIS with SRST bit cleared, then the device does internal diags &
* initialization, followed by indicating it's initialization status
* using ATA signature D2H register FIS to the host controller.
*/
sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE,
0, 0, 5);
tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */
ata_tf_to_fis(&tf, pmp, 0, cfis);
if (pmp != SATA_PMP_CTRL_PORT)
iowrite32(pmp, CQPMP + hcr_base);
iowrite32(1, CQ + hcr_base);
ata_msleep(ap, 150); /* ?? */
/*
* The above command would have signalled an interrupt on command
* complete, which needs special handling, by clearing the Nth
* command bit of the CCreg
*/
iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */
DPRINTK("SATA FSL : Now checking device signature\n");
*class = ATA_DEV_NONE;
/* Verify if SStatus indicates device presence */
if (ata_link_online(link)) {
/*
* if we are here, device presence has been detected,
* 1st D2H FIS would have been received, but sfis in
* command desc. is not updated, but signature register
* would have been updated
*/
*class = sata_fsl_dev_classify(ap);
DPRINTK("class = %d\n", *class);
VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC));
VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
}
return 0;
err:
return -EIO;
}
static void sata_fsl_error_handler(struct ata_port *ap)
{
DPRINTK("in xx_error_handler\n");
sata_pmp_error_handler(ap);
}
static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
{
if (qc->flags & ATA_QCFLAG_FAILED)
qc->err_mask |= AC_ERR_OTHER;
if (qc->err_mask) {
/* make DMA engine forget about the failed command */
}
}
static void sata_fsl_error_intr(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 hstatus, dereg=0, cereg = 0, SError = 0;
unsigned int err_mask = 0, action = 0;
int freeze = 0, abort=0;
struct ata_link *link = NULL;
struct ata_queued_cmd *qc = NULL;
struct ata_eh_info *ehi;
hstatus = ioread32(hcr_base + HSTATUS);
cereg = ioread32(hcr_base + CE);
/* first, analyze and record host port events */
link = &ap->link;
ehi = &link->eh_info;
ata_ehi_clear_desc(ehi);
/*
* Handle & Clear SError
*/
sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
if (unlikely(SError & 0xFFFF0000))
sata_fsl_scr_write(&ap->link, SCR_ERROR, SError);
DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n",
hstatus, cereg, ioread32(hcr_base + DE), SError);
/* handle fatal errors */
if (hstatus & FATAL_ERROR_DECODE) {
ehi->err_mask |= AC_ERR_ATA_BUS;
ehi->action |= ATA_EH_SOFTRESET;
freeze = 1;
}
/* Handle SDB FIS receive & notify update */
if (hstatus & INT_ON_SNOTIFY_UPDATE)
sata_async_notification(ap);
/* Handle PHYRDY change notification */
if (hstatus & INT_ON_PHYRDY_CHG) {
DPRINTK("SATA FSL: PHYRDY change indication\n");
/* Setup a soft-reset EH action */
ata_ehi_hotplugged(ehi);
ata_ehi_push_desc(ehi, "%s", "PHY RDY changed");
freeze = 1;
}
/* handle single device errors */
if (cereg) {
/*
* clear the command error, also clears queue to the device
* in error, and we can (re)issue commands to this device.
* When a device is in error all commands queued into the
* host controller and at the device are considered aborted
* and the queue for that device is stopped. Now, after
* clearing the device error, we can issue commands to the
* device to interrogate it to find the source of the error.
*/
abort = 1;
DPRINTK("single device error, CE=0x%x, DE=0x%x\n",
ioread32(hcr_base + CE), ioread32(hcr_base + DE));
/* find out the offending link and qc */
if (ap->nr_pmp_links) {
unsigned int dev_num;
dereg = ioread32(hcr_base + DE);
iowrite32(dereg, hcr_base + DE);
iowrite32(cereg, hcr_base + CE);
dev_num = ffs(dereg) - 1;
if (dev_num < ap->nr_pmp_links && dereg != 0) {
link = &ap->pmp_link[dev_num];
ehi = &link->eh_info;
qc = ata_qc_from_tag(ap, link->active_tag);
/*
* We should consider this as non fatal error,
* and TF must be updated as done below.
*/
err_mask |= AC_ERR_DEV;
} else {
err_mask |= AC_ERR_HSM;
action |= ATA_EH_HARDRESET;
freeze = 1;
}
} else {
dereg = ioread32(hcr_base + DE);
iowrite32(dereg, hcr_base + DE);
iowrite32(cereg, hcr_base + CE);
qc = ata_qc_from_tag(ap, link->active_tag);
/*
* We should consider this as non fatal error,
* and TF must be updated as done below.
*/
err_mask |= AC_ERR_DEV;
}
}
/* record error info */
if (qc)
qc->err_mask |= err_mask;
else
ehi->err_mask |= err_mask;
ehi->action |= action;
/* 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 void sata_fsl_host_intr(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 hstatus, done_mask = 0;
struct ata_queued_cmd *qc;
u32 SError;
hstatus = ioread32(hcr_base + HSTATUS);
sata_fsl_scr_read(&ap->link, SCR_ERROR, &SError);
if (unlikely(SError & 0xFFFF0000)) {
DPRINTK("serror @host_intr : 0x%x\n", SError);
sata_fsl_error_intr(ap);
}
if (unlikely(hstatus & INT_ON_ERROR)) {
DPRINTK("error interrupt!!\n");
sata_fsl_error_intr(ap);
return;
}
/* Read command completed register */
done_mask = ioread32(hcr_base + CC);
VPRINTK("Status of all queues :\n");
VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
done_mask,
ioread32(hcr_base + CA),
ioread32(hcr_base + CE),
ioread32(hcr_base + CQ),
ap->qc_active);
if (done_mask & ap->qc_active) {
int i;
/* clear CC bit, this will also complete the interrupt */
iowrite32(done_mask, hcr_base + CC);
DPRINTK("Status of all queues :\n");
DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
done_mask, ioread32(hcr_base + CA),
ioread32(hcr_base + CE));
for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
libata: always use ata_qc_complete_multiple() for NCQ command completions Currently, sata_fsl, mv and nv call ata_qc_complete() multiple times from their interrupt handlers to indicate completion of NCQ commands. This limits the visibility the libata core layer has into how commands are being executed and completed, which is necessary to support IRQ expecting in generic way. libata already has an interface to complete multiple commands at once - ata_qc_complete_multiple() which ahci and sata_sil24 already use. This patch updates the three drivers to use ata_qc_complete_multiple() too and updates comments on ata_qc_complete[_multiple]() regarding their usages with NCQ completions. This change not only provides better visibility into command execution to the core layer but also simplifies low level drivers. * sata_fsl: It already builds done_mask. Conversion is straight forward. * sata_mv: mv_process_crpb_response() no longer checks for illegal completions, it just returns whether the tag is completed or not. mv_process_crpb_entries() builds done_mask from it and passes it to ata_qc_complete_multiple() which will check for illegal completions. * sata_nv adma: Similar to sata_mv. nv_adma_check_cpb() now just returns the tag status and nv_adma_interrupt() builds done_mask from it and passes it to ata_qc_complete_multiple(). * sata_nv swncq: It already builds done_mask. Drop unnecessary illegal transition checks and call ata_qc_complete_multiple(). In the long run, it might be a good idea to make ata_qc_complete() whine if called when multiple NCQ commands are in flight. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ashish Kalra <ashish.kalra@freescale.com> Cc: Saeed Bishara <saeed@marvell.com> Cc: Mark Lord <liml@rtr.ca> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-06-25 21:03:34 +08:00
if (done_mask & (1 << i))
DPRINTK
("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
i, ioread32(hcr_base + CC),
ioread32(hcr_base + CA));
}
libata: always use ata_qc_complete_multiple() for NCQ command completions Currently, sata_fsl, mv and nv call ata_qc_complete() multiple times from their interrupt handlers to indicate completion of NCQ commands. This limits the visibility the libata core layer has into how commands are being executed and completed, which is necessary to support IRQ expecting in generic way. libata already has an interface to complete multiple commands at once - ata_qc_complete_multiple() which ahci and sata_sil24 already use. This patch updates the three drivers to use ata_qc_complete_multiple() too and updates comments on ata_qc_complete[_multiple]() regarding their usages with NCQ completions. This change not only provides better visibility into command execution to the core layer but also simplifies low level drivers. * sata_fsl: It already builds done_mask. Conversion is straight forward. * sata_mv: mv_process_crpb_response() no longer checks for illegal completions, it just returns whether the tag is completed or not. mv_process_crpb_entries() builds done_mask from it and passes it to ata_qc_complete_multiple() which will check for illegal completions. * sata_nv adma: Similar to sata_mv. nv_adma_check_cpb() now just returns the tag status and nv_adma_interrupt() builds done_mask from it and passes it to ata_qc_complete_multiple(). * sata_nv swncq: It already builds done_mask. Drop unnecessary illegal transition checks and call ata_qc_complete_multiple(). In the long run, it might be a good idea to make ata_qc_complete() whine if called when multiple NCQ commands are in flight. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ashish Kalra <ashish.kalra@freescale.com> Cc: Saeed Bishara <saeed@marvell.com> Cc: Mark Lord <liml@rtr.ca> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-06-25 21:03:34 +08:00
ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
return;
} else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) {
iowrite32(1, hcr_base + CC);
qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
DPRINTK("completing non-ncq cmd, CC=0x%x\n",
ioread32(hcr_base + CC));
if (qc) {
ata_qc_complete(qc);
}
} else {
/* Spurious Interrupt!! */
DPRINTK("spurious interrupt!!, CC = 0x%x\n",
ioread32(hcr_base + CC));
iowrite32(done_mask, hcr_base + CC);
return;
}
}
static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
struct sata_fsl_host_priv *host_priv = host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 interrupt_enables;
unsigned handled = 0;
struct ata_port *ap;
/* ack. any pending IRQs for this controller/port */
interrupt_enables = ioread32(hcr_base + HSTATUS);
interrupt_enables &= 0x3F;
DPRINTK("interrupt status 0x%x\n", interrupt_enables);
if (!interrupt_enables)
return IRQ_NONE;
spin_lock(&host->lock);
/* Assuming one port per host controller */
ap = host->ports[0];
if (ap) {
sata_fsl_host_intr(ap);
} else {
dev_warn(host->dev, "interrupt on disabled port 0\n");
}
iowrite32(interrupt_enables, hcr_base + HSTATUS);
handled = 1;
spin_unlock(&host->lock);
return IRQ_RETVAL(handled);
}
/*
* Multiple ports are represented by multiple SATA controllers with
* one port per controller
*/
static int sata_fsl_init_controller(struct ata_host *host)
{
struct sata_fsl_host_priv *host_priv = host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
u32 temp;
/*
* NOTE : We cannot bring the controller online before setting
* the CHBA, hence main controller initialization is done as
* part of the port_start() callback
*/
/* sata controller to operate in enterprise mode */
temp = ioread32(hcr_base + HCONTROL);
iowrite32(temp & ~HCONTROL_LEGACY, hcr_base + HCONTROL);
/* ack. any pending IRQs for this controller/port */
temp = ioread32(hcr_base + HSTATUS);
if (temp & 0x3F)
iowrite32((temp & 0x3F), hcr_base + HSTATUS);
/* Keep interrupts disabled on the controller */
temp = ioread32(hcr_base + HCONTROL);
iowrite32((temp & ~0x3F), hcr_base + HCONTROL);
/* Disable interrupt coalescing control(icc), for the moment */
DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC));
iowrite32(0x01000000, hcr_base + ICC);
/* clear error registers, SError is cleared by libATA */
iowrite32(0x00000FFFF, hcr_base + CE);
iowrite32(0x00000FFFF, hcr_base + DE);
/*
* reset the number of command complete bits which will cause the
* interrupt to be signaled
*/
fsl_sata_set_irq_coalescing(host, intr_coalescing_count,
intr_coalescing_ticks);
/*
* host controller will be brought on-line, during xx_port_start()
* callback, that should also initiate the OOB, COMINIT sequence
*/
DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
return 0;
}
/*
* scsi mid-layer and libata interface structures
*/
static struct scsi_host_template sata_fsl_sht = {
ATA_NCQ_SHT("sata_fsl"),
.can_queue = SATA_FSL_QUEUE_DEPTH,
.sg_tablesize = SATA_FSL_MAX_PRD_USABLE,
.dma_boundary = ATA_DMA_BOUNDARY,
};
static struct ata_port_operations sata_fsl_ops = {
.inherits = &sata_pmp_port_ops,
libata: implement and use ops inheritance libata lets low level drivers build ata_port_operations table and register it with libata core layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This becomes worse for drivers which support related similar controllers which differ slightly. They share most of the operations except for a few. However, the driver still needs to list all operations for each variant. This results in large number of duplicate entries, which is not only inefficient but also error-prone as it becomes very difficult to tell what the actual differences are. This duplicate boilerplates all over the low level drivers also make updating the core layer exteremely difficult and error-prone. When compounded with multi-branched development model, it ends up accumulating inconsistencies over time. Some of those inconsistencies cause immediate problems and fixed. Others just remain there dormant making maintenance increasingly difficult. To rectify the problem, this patch implements ata_port_operations inheritance. To allow LLDs to easily re-use their own ops tables overriding only specific methods, this patch implements poor man's class inheritance. An ops table has ->inherits field which can be set to any ops table as long as it doesn't create a loop. When the host is started, the inheritance chain is followed and any operation which isn't specified is taken from the nearest ancestor which has it specified. This operation is called finalization and done only once per an ops table and the LLD doesn't have to do anything special about it other than making the ops table non-const such that libata can update it. libata provides four base ops tables lower drivers can inherit from - base, sata, pmp, sff and bmdma. To avoid overriding these ops accidentaly, these ops are declared const and LLDs should always inherit these instead of using them directly. After finalization, all the ops table are identical before and after the patch except for setting .irq_handler to ata_interrupt in drivers which didn't use to. The .irq_handler doesn't have any actual effect and the field will soon be removed by later patch. * sata_sx4 is still using old style EH and currently doesn't take advantage of ops inheritance. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 11:22:49 +08:00
.qc_defer = ata_std_qc_defer,
.qc_prep = sata_fsl_qc_prep,
.qc_issue = sata_fsl_qc_issue,
.qc_fill_rtf = sata_fsl_qc_fill_rtf,
.scr_read = sata_fsl_scr_read,
.scr_write = sata_fsl_scr_write,
.freeze = sata_fsl_freeze,
.thaw = sata_fsl_thaw,
libata: make reset related methods proper port operations Currently reset methods are not specified directly in the ata_port_operations table. If a LLD wants to use custom reset methods, it should construct and use a error_handler which uses those reset methods. It's done this way for two reasons. First, the ops table already contained too many methods and adding four more of them would noticeably increase the amount of necessary boilerplate code all over low level drivers. Second, as ->error_handler uses those reset methods, it can get confusing. ie. By overriding ->error_handler, those reset ops can be made useless making layering a bit hazy. Now that ops table uses inheritance, the first problem doesn't exist anymore. The second isn't completely solved but is relieved by providing default values - most drivers can just override what it has implemented and don't have to concern itself about higher level callbacks. In fact, there currently is no driver which actually modifies error handling behavior. Drivers which override ->error_handler just wraps the standard error handler only to prepare the controller for EH. I don't think making ops layering strict has any noticeable benefit. This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and their PMP counterparts propoer ops. Default ops are provided in the base ops tables and drivers are converted to override individual reset methods instead of creating custom error_handler. * ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs aren't accessible. sata_promise doesn't need to use separate error_handlers for PATA and SATA anymore. * softreset is broken for sata_inic162x and sata_sx4. As libata now always prefers hardreset, this doesn't really matter but the ops are forced to NULL using ATA_OP_NULL for documentation purpose. * pata_hpt374 needs to use different prereset for the first and second PCI functions. This used to be done by branching from hpt374_error_handler(). The proper way to do this is to use separate ops and port_info tables for each function. Converted. Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-25 11:22:50 +08:00
.softreset = sata_fsl_softreset,
.hardreset = sata_fsl_hardreset,
.pmp_softreset = sata_fsl_softreset,
.error_handler = sata_fsl_error_handler,
.post_internal_cmd = sata_fsl_post_internal_cmd,
.port_start = sata_fsl_port_start,
.port_stop = sata_fsl_port_stop,
.pmp_attach = sata_fsl_pmp_attach,
.pmp_detach = sata_fsl_pmp_detach,
};
static const struct ata_port_info sata_fsl_port_info[] = {
{
.flags = SATA_FSL_HOST_FLAGS,
.pio_mask = ATA_PIO4,
.udma_mask = ATA_UDMA6,
.port_ops = &sata_fsl_ops,
},
};
static int sata_fsl_probe(struct platform_device *ofdev)
{
int retval = -ENXIO;
void __iomem *hcr_base = NULL;
void __iomem *ssr_base = NULL;
void __iomem *csr_base = NULL;
struct sata_fsl_host_priv *host_priv = NULL;
int irq;
struct ata_host *host = NULL;
u32 temp;
struct ata_port_info pi = sata_fsl_port_info[0];
const struct ata_port_info *ppi[] = { &pi, NULL };
dev_info(&ofdev->dev, "Sata FSL Platform/CSB Driver init\n");
hcr_base = of_iomap(ofdev->dev.of_node, 0);
if (!hcr_base)
goto error_exit_with_cleanup;
ssr_base = hcr_base + 0x100;
csr_base = hcr_base + 0x140;
if (!of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc8315-sata")) {
temp = ioread32(csr_base + TRANSCFG);
temp = temp & 0xffffffe0;
iowrite32(temp | TRANSCFG_RX_WATER_MARK, csr_base + TRANSCFG);
}
DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);
if (!host_priv)
goto error_exit_with_cleanup;
host_priv->hcr_base = hcr_base;
host_priv->ssr_base = ssr_base;
host_priv->csr_base = csr_base;
irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
if (irq < 0) {
dev_err(&ofdev->dev, "invalid irq from platform\n");
goto error_exit_with_cleanup;
}
host_priv->irq = irq;
if (of_device_is_compatible(ofdev->dev.of_node, "fsl,pq-sata-v2"))
host_priv->data_snoop = DATA_SNOOP_ENABLE_V2;
else
host_priv->data_snoop = DATA_SNOOP_ENABLE_V1;
/* allocate host structure */
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS);
if (!host) {
retval = -ENOMEM;
goto error_exit_with_cleanup;
}
/* host->iomap is not used currently */
host->private_data = host_priv;
/* initialize host controller */
sata_fsl_init_controller(host);
/*
* Now, register with libATA core, this will also initiate the
* device discovery process, invoking our port_start() handler &
* error_handler() to execute a dummy Softreset EH session
*/
ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG,
&sata_fsl_sht);
dev_set_drvdata(&ofdev->dev, host);
host_priv->intr_coalescing.show = fsl_sata_intr_coalescing_show;
host_priv->intr_coalescing.store = fsl_sata_intr_coalescing_store;
sysfs_attr_init(&host_priv->intr_coalescing.attr);
host_priv->intr_coalescing.attr.name = "intr_coalescing";
host_priv->intr_coalescing.attr.mode = S_IRUGO | S_IWUSR;
retval = device_create_file(host->dev, &host_priv->intr_coalescing);
if (retval)
goto error_exit_with_cleanup;
return 0;
error_exit_with_cleanup:
if (host) {
dev_set_drvdata(&ofdev->dev, NULL);
ata_host_detach(host);
}
if (hcr_base)
iounmap(hcr_base);
if (host_priv)
kfree(host_priv);
return retval;
}
static int sata_fsl_remove(struct platform_device *ofdev)
{
struct ata_host *host = dev_get_drvdata(&ofdev->dev);
struct sata_fsl_host_priv *host_priv = host->private_data;
device_remove_file(&ofdev->dev, &host_priv->intr_coalescing);
ata_host_detach(host);
dev_set_drvdata(&ofdev->dev, NULL);
irq_dispose_mapping(host_priv->irq);
iounmap(host_priv->hcr_base);
kfree(host_priv);
return 0;
}
#ifdef CONFIG_PM
static int sata_fsl_suspend(struct platform_device *op, pm_message_t state)
{
struct ata_host *host = dev_get_drvdata(&op->dev);
return ata_host_suspend(host, state);
}
static int sata_fsl_resume(struct platform_device *op)
{
struct ata_host *host = dev_get_drvdata(&op->dev);
struct sata_fsl_host_priv *host_priv = host->private_data;
int ret;
void __iomem *hcr_base = host_priv->hcr_base;
struct ata_port *ap = host->ports[0];
struct sata_fsl_port_priv *pp = ap->private_data;
ret = sata_fsl_init_controller(host);
if (ret) {
dev_err(&op->dev, "Error initializing hardware\n");
return ret;
}
/* Recovery the CHBA register in host controller cmd register set */
iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA);
iowrite32((ioread32(hcr_base + HCONTROL)
| HCONTROL_ONLINE_PHY_RST
| HCONTROL_SNOOP_ENABLE
| HCONTROL_PMP_ATTACHED),
hcr_base + HCONTROL);
ata_host_resume(host);
return 0;
}
#endif
static struct of_device_id fsl_sata_match[] = {
{
.compatible = "fsl,pq-sata",
},
{
.compatible = "fsl,pq-sata-v2",
},
{},
};
MODULE_DEVICE_TABLE(of, fsl_sata_match);
static struct platform_driver fsl_sata_driver = {
.driver = {
.name = "fsl-sata",
.owner = THIS_MODULE,
.of_match_table = fsl_sata_match,
},
.probe = sata_fsl_probe,
.remove = sata_fsl_remove,
#ifdef CONFIG_PM
.suspend = sata_fsl_suspend,
.resume = sata_fsl_resume,
#endif
};
module_platform_driver(fsl_sata_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor");
MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver");
MODULE_VERSION("1.10");