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authorAlexander Gordeev <agordeev@redhat.com>2014-09-29 20:25:58 +0400
committerTejun Heo <tj@kernel.org>2014-10-06 19:43:34 +0400
commit1c62854f5f7321b3ee8c08d34d7c1e615608566d (patch)
tree5d3485de13bee343286f6de651dfaab1a007834c /drivers/ata/libahci.c
parenta6849b9fdbffd2492a848df942b39d23bd81ef27 (diff)
downloadlinux-1c62854f5f7321b3ee8c08d34d7c1e615608566d.tar.xz
AHCI: Move ahci_host_activate() function to libahci.c
This update is a prerequisite for consolidation of AHCI host activation code within ahci_host_activate() function. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: linux-ide@vger.kernel.org
Diffstat (limited to 'drivers/ata/libahci.c')
-rw-r--r--drivers/ata/libahci.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index b784e9de426a..21bb427d9df4 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -2472,6 +2472,67 @@ void ahci_set_em_messages(struct ahci_host_priv *hpriv,
}
EXPORT_SYMBOL_GPL(ahci_set_em_messages);
+/**
+ * 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)
+{
+ 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;
+}
+EXPORT_SYMBOL_GPL(ahci_host_activate);
+
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
MODULE_LICENSE("GPL");