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Date: Wed, 27 Dec 2006 00:18:34 +0900
From: Tejun Heo <htejun@...il.com>
To: gregkh@...e.de, jeff@...zik.org, linux-kernel@...r.kernel.org,
linux-ide@...r.kernel.org, htejun@...il.com
Cc: Tejun Heo <htejun@...il.com>
Subject: [PATCH 8/12] libata: update libata core layer to use devres
Update libata core layer to use devres.
* ata_device_add() acquires all resources in managed mode.
* ata_host is allocated as devres associated with ata_host_release.
* Port attached status is handled as devres associated with
ata_host_attach_release().
* Initialization failure and host removal is handedl by releasing
devres group.
* Except for ata_scsi_release() removal, LLD interface remains the
same. Some functions use hacky is_managed test to support both
managed and unmanaged devices. These will go away once all LLDs are
updated to use devres.
Signed-off-by: Tejun Heo <htejun@...il.com>
---
drivers/ata/ahci.c | 22 +-----
drivers/ata/libata-core.c | 176 ++++++++++++++++++++-------------------------
drivers/ata/libata-scsi.c | 3 +-
drivers/ata/libata-sff.c | 47 ++++++-------
include/linux/libata.h | 9 +--
5 files changed, 109 insertions(+), 148 deletions(-)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0656334..76bf3e6 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1763,38 +1763,24 @@ err_out:
return rc;
}
-static void ahci_remove_one (struct pci_dev *pdev)
+static void ahci_remove_one(struct pci_dev *pdev)
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host *host = dev_get_drvdata(dev);
struct ahci_host_priv *hpriv = host->private_data;
- unsigned int i;
- int have_msi;
- for (i = 0; i < host->n_ports; i++)
- ata_port_detach(host->ports[i]);
+ ata_host_remove(host);
- have_msi = hpriv->flags & AHCI_FLAG_MSI;
- free_irq(host->irq, host);
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
-
- ata_scsi_release(ap->scsi_host);
- scsi_host_put(ap->scsi_host);
- }
-
- kfree(hpriv);
pci_iounmap(pdev, host->mmio_base);
- kfree(host);
- if (have_msi)
+ if (hpriv->flags & AHCI_FLAG_MSI)
pci_disable_msi(pdev);
else
pci_intx(pdev, 0);
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
+ kfree(hpriv);
}
static int __init ahci_init(void)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5fdf37f..3af7994 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5511,28 +5511,25 @@ void ata_host_resume(struct ata_host *host)
* LOCKING:
* Inherited from caller.
*/
-
-int ata_port_start (struct ata_port *ap)
+int ata_port_start(struct ata_port *ap)
{
struct device *dev = ap->dev;
int rc;
- ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
+ ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
+ GFP_KERNEL);
if (!ap->prd)
return -ENOMEM;
rc = ata_pad_alloc(ap, dev);
- if (rc) {
- dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
+ if (rc)
return rc;
- }
-
- DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
+ DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
+ (unsigned long long)ap->prd_dma);
return 0;
}
-
/**
* ata_port_stop - Undo ata_port_start()
* @ap: Port to shut down
@@ -5544,12 +5541,11 @@ int ata_port_start (struct ata_port *ap)
* LOCKING:
* Inherited from caller.
*/
-
void ata_port_stop (struct ata_port *ap)
{
struct device *dev = ap->dev;
- dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
+ dmam_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
ata_pad_free(ap, dev);
}
@@ -5732,6 +5728,27 @@ static struct ata_port * ata_port_add(const struct ata_probe_ent *ent,
return ap;
}
+static void ata_host_release(struct device *gendev, void *res)
+{
+ struct ata_host *host = dev_get_drvdata(gendev);
+ int i;
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ if (!ap)
+ continue;
+
+ if (ap->ops->port_stop)
+ ap->ops->port_stop(ap);
+
+ scsi_host_put(ap->scsi_host);
+ }
+
+ if (host->ops->host_stop)
+ host->ops->host_stop(host);
+}
+
/**
* ata_sas_host_init - Initialize a host struct
* @host: host to initialize
@@ -5784,11 +5801,17 @@ int ata_device_add(const struct ata_probe_ent *ent)
dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n");
return 0;
}
+
+ if (!devres_open_group(dev, ata_device_add, GFP_KERNEL))
+ return 0;
+
/* alloc a container for our list of ATA ports (buses) */
- host = kzalloc(sizeof(struct ata_host) +
- (ent->n_ports * sizeof(void *)), GFP_KERNEL);
+ host = devres_alloc(ata_host_release, sizeof(struct ata_host) +
+ (ent->n_ports * sizeof(void *)), GFP_KERNEL);
if (!host)
- return 0;
+ goto err_out;
+ devres_add(dev, host);
+ dev_set_drvdata(dev, host);
ata_host_init(host, dev, ent->_host_flags, ent->port_ops);
host->n_ports = ent->n_ports;
@@ -5846,8 +5869,8 @@ int ata_device_add(const struct ata_probe_ent *ent)
}
/* obtain irq, that may be shared between channels */
- rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
- DRV_NAME, host);
+ rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler,
+ ent->irq_flags, DRV_NAME, host);
if (rc) {
dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
ent->irq, rc);
@@ -5860,15 +5883,19 @@ int ata_device_add(const struct ata_probe_ent *ent)
so trap it now */
BUG_ON(ent->irq == ent->irq2);
- rc = request_irq(ent->irq2, ent->port_ops->irq_handler, ent->irq_flags,
- DRV_NAME, host);
+ rc = devm_request_irq(dev, ent->irq2,
+ ent->port_ops->irq_handler, ent->irq_flags,
+ DRV_NAME, host);
if (rc) {
dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
ent->irq2, rc);
- goto err_out_free_irq;
+ goto err_out;
}
}
+ /* resource acquisition complete */
+ devres_close_group(dev, ata_device_add);
+
/* perform each probe synchronously */
DPRINTK("probe begin\n");
for (i = 0; i < host->n_ports; i++) {
@@ -5937,24 +5964,13 @@ int ata_device_add(const struct ata_probe_ent *ent)
ata_scsi_scan_host(ap);
}
- dev_set_drvdata(dev, host);
-
VPRINTK("EXIT, returning %u\n", ent->n_ports);
return ent->n_ports; /* success */
-err_out_free_irq:
- free_irq(ent->irq, host);
-err_out:
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
- if (ap) {
- ap->ops->port_stop(ap);
- scsi_host_put(ap->scsi_host);
- }
- }
-
- kfree(host);
- VPRINTK("EXIT, returning 0\n");
+ err_out:
+ devres_release_group(dev, ata_device_add);
+ dev_set_drvdata(dev, NULL);
+ VPRINTK("EXIT, returning %d\n", rc);
return 0;
}
@@ -6026,7 +6042,6 @@ void ata_port_detach(struct ata_port *ap)
* LOCKING:
* Inherited from calling layer (may sleep).
*/
-
void ata_host_remove(struct ata_host *host)
{
unsigned int i;
@@ -6034,59 +6049,7 @@ void ata_host_remove(struct ata_host *host)
for (i = 0; i < host->n_ports; i++)
ata_port_detach(host->ports[i]);
- free_irq(host->irq, host);
- if (host->irq2)
- free_irq(host->irq2, host);
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
-
- ata_scsi_release(ap->scsi_host);
-
- if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
- struct ata_ioports *ioaddr = &ap->ioaddr;
-
- /* FIXME: Add -ac IDE pci mods to remove these special cases */
- if (ioaddr->cmd_addr == ATA_PRIMARY_CMD)
- release_region(ATA_PRIMARY_CMD, 8);
- else if (ioaddr->cmd_addr == ATA_SECONDARY_CMD)
- release_region(ATA_SECONDARY_CMD, 8);
- }
-
- scsi_host_put(ap->scsi_host);
- }
-
- if (host->ops->host_stop)
- host->ops->host_stop(host);
-
- kfree(host);
-}
-
-/**
- * ata_scsi_release - SCSI layer callback hook for host unload
- * @shost: libata host to be unloaded
- *
- * Performs all duties necessary to shut down a libata port...
- * Kill port kthread, disable port, and release resources.
- *
- * LOCKING:
- * Inherited from SCSI layer.
- *
- * RETURNS:
- * One.
- */
-
-int ata_scsi_release(struct Scsi_Host *shost)
-{
- struct ata_port *ap = ata_shost_to_port(shost);
-
- DPRINTK("ENTER\n");
-
- ap->ops->port_disable(ap);
- ap->ops->port_stop(ap);
-
- DPRINTK("EXIT\n");
- return 1;
+ devres_release_group(host->dev, ata_device_add);
}
struct ata_probe_ent *
@@ -6094,7 +6057,11 @@ ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
{
struct ata_probe_ent *probe_ent;
- probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
+ /* XXX - the following if can go away once all LLDs are managed */
+ if (!list_empty(&dev->devres_head))
+ probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
+ else
+ probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
if (!probe_ent) {
printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
kobject_name(&(dev->kobj)));
@@ -6148,7 +6115,11 @@ void ata_pci_host_stop (struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
- pci_iounmap(pdev, host->mmio_base);
+ /* XXX - the following if can go away once all LLDs are managed */
+ if (!list_empty(&host->dev->devres_head))
+ pcim_iounmap(pdev, host->mmio_base);
+ else
+ pci_iounmap(pdev, host->mmio_base);
}
/**
@@ -6164,17 +6135,23 @@ void ata_pci_host_stop (struct ata_host *host)
* LOCKING:
* Inherited from PCI layer (may sleep).
*/
-
-void ata_pci_remove_one (struct pci_dev *pdev)
+void ata_pci_remove_one(struct pci_dev *pdev)
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host *host = dev_get_drvdata(dev);
- ata_host_remove(host);
+ /* XXX - the following if can go away once all LLDs are managed */
+ if (!list_empty(&host->dev->devres_head)) {
+ ata_host_remove(host);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ dev_set_drvdata(dev, NULL);
+ } else {
+ int i;
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- dev_set_drvdata(dev, NULL);
+ for (i = 0; i < host->n_ports; i++)
+ ata_port_detach(host->ports[i]);
+ }
}
/* move to PCI subsystem */
@@ -6228,7 +6205,11 @@ int ata_pci_device_do_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
- rc = pci_enable_device(pdev);
+ /* XXX - the following if can go away once all LLDs are managed */
+ if (!list_empty(&pdev->dev.devres_head))
+ rc = pcim_enable_device(pdev);
+ else
+ rc = pci_enable_device(pdev);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev,
"failed to enable device after resume (%d)\n", rc);
@@ -6467,7 +6448,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
-EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
EXPORT_SYMBOL_GPL(sata_scr_valid);
EXPORT_SYMBOL_GPL(sata_scr_read);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 836947d..9db2d07 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3226,7 +3226,8 @@ EXPORT_SYMBOL_GPL(ata_sas_port_init);
void ata_sas_port_destroy(struct ata_port *ap)
{
- ap->ops->port_stop(ap);
+ if (ap->ops->port_stop)
+ ap->ops->port_stop(ap);
kfree(ap);
}
EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 10ee22a..be9a0db 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -979,15 +979,18 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
unsigned int n_ports)
{
+ struct device *dev = &pdev->dev;
struct ata_probe_ent *probe_ent = NULL;
struct ata_port_info *port[2];
u8 mask;
unsigned int legacy_mode = 0;
- int disable_dev_on_err = 1;
int rc;
DPRINTK("ENTER\n");
+ if (!devres_open_group(dev, NULL, GFP_KERNEL))
+ return -ENOMEM;
+
BUG_ON(n_ports < 1 || n_ports > 2);
port[0] = port_info[0];
@@ -1004,9 +1007,9 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
boot for the primary video which is BIOS enabled
*/
- rc = pci_enable_device(pdev);
+ rc = pcim_enable_device(pdev);
if (rc)
- return rc;
+ goto err_out;
if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
u8 tmp8;
@@ -1022,19 +1025,20 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
left a device in compatibility mode */
if (legacy_mode) {
printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");
- return -EOPNOTSUPP;
+ rc = -EOPNOTSUPP;
+ goto err_out;
}
#endif
}
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
- disable_dev_on_err = 0;
+ pcim_pin_device(pdev);
goto err_out;
}
if (legacy_mode) {
- if (!request_region(ATA_PRIMARY_CMD, 8, "libata")) {
+ if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) {
struct resource *conflict, res;
res.start = ATA_PRIMARY_CMD;
res.end = ATA_PRIMARY_CMD + 8 - 1;
@@ -1044,7 +1048,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
if (!strcmp(conflict->name, "libata"))
legacy_mode |= ATA_PORT_PRIMARY;
else {
- disable_dev_on_err = 0;
+ pcim_pin_device(pdev);
printk(KERN_WARNING "ata: 0x%0X IDE port busy\n" \
"ata: conflict with %s\n",
ATA_PRIMARY_CMD,
@@ -1053,7 +1057,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
} else
legacy_mode |= ATA_PORT_PRIMARY;
- if (!request_region(ATA_SECONDARY_CMD, 8, "libata")) {
+ if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) {
struct resource *conflict, res;
res.start = ATA_SECONDARY_CMD;
res.end = ATA_SECONDARY_CMD + 8 - 1;
@@ -1063,7 +1067,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
if (!strcmp(conflict->name, "libata"))
legacy_mode |= ATA_PORT_SECONDARY;
else {
- disable_dev_on_err = 0;
+ pcim_pin_device(pdev);
printk(KERN_WARNING "ata: 0x%X IDE port busy\n" \
"ata: conflict with %s\n",
ATA_SECONDARY_CMD,
@@ -1076,16 +1080,16 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
/* we have legacy mode, but all ports are unavailable */
if (legacy_mode == (1 << 3)) {
rc = -EBUSY;
- goto err_out_regions;
+ goto err_out;
}
/* TODO: If we get no DMA mask we should fall back to PIO */
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
- goto err_out_regions;
+ goto err_out;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
- goto err_out_regions;
+ goto err_out;
if (legacy_mode) {
probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode);
@@ -1097,31 +1101,22 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
}
if (!probe_ent) {
rc = -ENOMEM;
- goto err_out_regions;
+ goto err_out;
}
pci_set_master(pdev);
if (!ata_device_add(probe_ent)) {
rc = -ENODEV;
- goto err_out_ent;
+ goto err_out;
}
- kfree(probe_ent);
-
+ devm_kfree(dev, probe_ent);
+ devres_remove_group(dev, NULL);
return 0;
-err_out_ent:
- kfree(probe_ent);
-err_out_regions:
- if (legacy_mode & ATA_PORT_PRIMARY)
- release_region(ATA_PRIMARY_CMD, 8);
- if (legacy_mode & ATA_PORT_SECONDARY)
- release_region(ATA_SECONDARY_CMD, 8);
- pci_release_regions(pdev);
err_out:
- if (disable_dev_on_err)
- pci_disable_device(pdev);
+ devres_release_group(dev, NULL);
return rc;
}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8028a57..293d80b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -31,7 +31,7 @@
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <asm/scatterlist.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <linux/ata.h>
#include <linux/workqueue.h>
#include <scsi/scsi_host.h>
@@ -732,7 +732,6 @@ extern void ata_host_remove(struct ata_host *host);
extern int ata_scsi_detect(struct scsi_host_template *sht);
extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
-extern int ata_scsi_release(struct Scsi_Host *host);
extern void ata_sas_port_destroy(struct ata_port *);
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
struct ata_port_info *, struct Scsi_Host *);
@@ -1229,14 +1228,14 @@ static inline unsigned int __ac_err_mask(u8 status)
static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
{
ap->pad_dma = 0;
- ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
- &ap->pad_dma, GFP_KERNEL);
+ ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
+ &ap->pad_dma, GFP_KERNEL);
return (ap->pad == NULL) ? -ENOMEM : 0;
}
static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
{
- dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
+ dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
}
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
--
1.4.4.2
-
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