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Message-Id: <39cff5287f4fcc33d0f00f89cb2337c5a5ec22b6.1411648623.git.agordeev@redhat.com>
Date: Thu, 25 Sep 2014 15:13:22 +0200
From: Alexander Gordeev <agordeev@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Alexander Gordeev <agordeev@...hat.com>, linux-ide@...r.kernel.org
Subject: [PATCH v4 2/4] AHCI: Move host activation code into ahci_host_activate()
Currently host activation done by calling either function
ahci_host_activate() or ata_host_activate(). Consolidate
the code by only calling ahci_host_activate() for all AHCI
devices.
Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
Cc: linux-ide@...r.kernel.org
---
drivers/ata/acard-ahci.c | 3 +-
drivers/ata/ahci.c | 66 +--------------------------------
drivers/ata/ahci.h | 6 +--
drivers/ata/libahci.c | 84 +++++++++++++++++++++++++++++++++++++++---
drivers/ata/libahci_platform.c | 3 +-
5 files changed, 83 insertions(+), 79 deletions(-)
diff --git a/drivers/ata/acard-ahci.c b/drivers/ata/acard-ahci.c
index 25d0ac3..c962886 100644
--- a/drivers/ata/acard-ahci.c
+++ b/drivers/ata/acard-ahci.c
@@ -498,8 +498,7 @@ static int acard_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id
acard_ahci_pci_print_info(host);
pci_set_master(pdev);
- return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
- &acard_ahci_sht);
+ return ahci_host_activate(host, pdev->irq, &acard_ahci_sht);
}
module_pci_driver(acard_ahci_pci_driver);
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index f68a995..d0ac38b 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1226,66 +1226,6 @@ intx:
return 0;
}
-/**
- * ahci_host_activate - start AHCI host, request IRQs and register it
- * @host: target ATA host
- * @irq: base IRQ number to request
- * @irq_handler: irq_handler used when requesting IRQs
- * @irq_flags: irq_flags used when requesting IRQs
- *
- * Similar to ata_host_activate, but requests IRQs according to AHCI-1.1
- * when multiple MSIs were allocated. That is one MSI per port, starting
- * from @irq.
- *
- * LOCKING:
- * Inherited from calling layer (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-int ahci_host_activate(struct ata_host *host, int irq)
-{
- int i, rc;
-
- rc = ata_host_start(host);
- if (rc)
- return rc;
-
- for (i = 0; i < host->n_ports; i++) {
- struct ahci_port_priv *pp = host->ports[i]->private_data;
-
- /* Do not receive interrupts sent by dummy ports */
- if (!pp) {
- disable_irq(irq + i);
- continue;
- }
-
- rc = devm_request_threaded_irq(host->dev, irq + i,
- ahci_hw_interrupt,
- ahci_thread_fn, IRQF_SHARED,
- pp->irq_desc, host->ports[i]);
- if (rc)
- goto out_free_irqs;
- }
-
- for (i = 0; i < host->n_ports; i++)
- ata_port_desc(host->ports[i], "irq %d", irq + i);
-
- rc = ata_host_register(host, &ahci_sht);
- if (rc)
- goto out_free_all_irqs;
-
- return 0;
-
-out_free_all_irqs:
- i = host->n_ports;
-out_free_irqs:
- for (i--; i >= 0; i--)
- devm_free_irq(host->dev, irq + i, host->ports[i]);
-
- return rc;
-}
-
static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
unsigned int board_id = ent->driver_data;
@@ -1487,11 +1427,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
- if (hpriv->flags & AHCI_HFLAG_MULTI_MSI)
- return ahci_host_activate(host, pdev->irq);
-
- return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
- &ahci_sht);
+ return ahci_host_activate(host, pdev->irq, &ahci_sht);
}
module_pci_driver(ahci_pci_driver);
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index a074c73..6a22055 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -388,11 +388,9 @@ int ahci_port_resume(struct ata_port *ap);
void ahci_set_em_messages(struct ahci_host_priv *hpriv,
struct ata_port_info *pi);
int ahci_reset_em(struct ata_host *host);
-irqreturn_t ahci_interrupt(int irq, void *dev_instance);
-irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance);
-irqreturn_t ahci_thread_fn(int irq, void *dev_instance);
void ahci_print_info(struct ata_host *host, const char *scc_s);
-int ahci_host_activate(struct ata_host *host, int irq);
+int ahci_host_activate(struct ata_host *host, int irq,
+ struct scsi_host_template *sht);
void ahci_error_handler(struct ata_port *ap);
static inline void __iomem *__ahci_port_base(struct ata_host *host,
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index b784e9d..0080551 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1789,7 +1789,7 @@ static void ahci_port_intr(struct ata_port *ap)
ahci_handle_port_interrupt(ap, port_mmio, status);
}
-irqreturn_t ahci_thread_fn(int irq, void *dev_instance)
+static irqreturn_t ahci_thread_fn(int irq, void *dev_instance)
{
struct ata_port *ap = dev_instance;
struct ahci_port_priv *pp = ap->private_data;
@@ -1809,7 +1809,6 @@ irqreturn_t ahci_thread_fn(int irq, void *dev_instance)
return IRQ_HANDLED;
}
-EXPORT_SYMBOL_GPL(ahci_thread_fn);
static void ahci_hw_port_interrupt(struct ata_port *ap)
{
@@ -1823,7 +1822,7 @@ static void ahci_hw_port_interrupt(struct ata_port *ap)
pp->intr_status |= status;
}
-irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance)
+static irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance)
{
struct ata_port *ap_this = dev_instance;
struct ahci_port_priv *pp = ap_this->private_data;
@@ -1877,9 +1876,8 @@ irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance)
return IRQ_WAKE_THREAD;
}
-EXPORT_SYMBOL_GPL(ahci_hw_interrupt);
-irqreturn_t ahci_interrupt(int irq, void *dev_instance)
+static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
struct ahci_host_priv *hpriv;
@@ -1938,7 +1936,6 @@ irqreturn_t ahci_interrupt(int irq, void *dev_instance)
return IRQ_RETVAL(handled);
}
-EXPORT_SYMBOL_GPL(ahci_interrupt);
unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
{
@@ -2472,6 +2469,81 @@ void ahci_set_em_messages(struct ahci_host_priv *hpriv,
}
EXPORT_SYMBOL_GPL(ahci_set_em_messages);
+static int ahci_host_activate_multi_irqs(struct ata_host *host, int irq,
+ struct scsi_host_template *sht)
+{
+ int i, rc;
+
+ rc = ata_host_start(host);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ahci_port_priv *pp = host->ports[i]->private_data;
+
+ /* Do not receive interrupts sent by dummy ports */
+ if (!pp) {
+ disable_irq(irq + i);
+ continue;
+ }
+
+ rc = devm_request_threaded_irq(host->dev, irq + i,
+ ahci_hw_interrupt,
+ ahci_thread_fn, IRQF_SHARED,
+ pp->irq_desc, host->ports[i]);
+ if (rc)
+ goto out_free_irqs;
+ }
+
+ for (i = 0; i < host->n_ports; i++)
+ ata_port_desc(host->ports[i], "irq %d", irq + i);
+
+ rc = ata_host_register(host, sht);
+ if (rc)
+ goto out_free_all_irqs;
+
+ return 0;
+
+out_free_all_irqs:
+ i = host->n_ports;
+out_free_irqs:
+ for (i--; i >= 0; i--)
+ devm_free_irq(host->dev, irq + i, host->ports[i]);
+
+ return rc;
+}
+
+/**
+ * ahci_host_activate - start AHCI host, request IRQs and register it
+ * @host: target ATA host
+ * @irq: base IRQ number to request
+ * @sht: scsi_host_template to use when registering the host
+ *
+ * Similar to ata_host_activate, but requests IRQs according to AHCI-1.1
+ * when multiple MSIs were allocated. That is one MSI per port, starting
+ * from @irq.
+ *
+ * LOCKING:
+ * Inherited from calling layer (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ahci_host_activate(struct ata_host *host, int irq,
+ struct scsi_host_template *sht)
+{
+ struct ahci_host_priv *hpriv = host->private_data;
+ int rc;
+
+ if (hpriv->flags & AHCI_HFLAG_MULTI_MSI)
+ rc = ahci_host_activate_multi_irqs(host, irq, sht);
+ else
+ rc = ata_host_activate(host, irq, ahci_interrupt,
+ IRQF_SHARED, sht);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_host_activate);
+
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
MODULE_LICENSE("GPL");
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index c7f787e..0b03f90 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -493,8 +493,7 @@ int ahci_platform_init_host(struct platform_device *pdev,
ahci_init_controller(host);
ahci_print_info(host, "platform");
- return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
- &ahci_platform_sht);
+ return ahci_host_activate(host, irq, &ahci_platform_sht);
}
EXPORT_SYMBOL_GPL(ahci_platform_init_host);
--
1.8.3.1
--
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