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authorTejun Heo <htejun@gmail.com>2008-04-07 22:47:20 +0900
committerJeff Garzik <jgarzik@redhat.com>2008-04-17 15:44:23 -0400
commit22183bf569c8600ff414ac25f23134044e0ef453 (patch)
tree1dea79cdbe439637477e1c4214b600b6823cb866 /drivers/ata/libata-sff.c
parent305d2a1ab137d11d573319c315748a87060fe82d (diff)
downloadop-kernel-dev-22183bf569c8600ff414ac25f23134044e0ef453.zip
op-kernel-dev-22183bf569c8600ff414ac25f23134044e0ef453.tar.gz
libata: add qc_fill_rtf port operation
On command completion, ata_qc_complete() directly called ops->tf_read to fill qc->result_tf. This patch adds ops->qc_fill_rtf to replace hardcoded ops->tf_read usage. ata_sff_qc_fill_rtf() which uses ops->tf_read to fill result_tf is implemented and set in ata_base_port_ops and other ops tables which don't inherit from ata_base_port_ops, so this patch doesn't introduce any behavior change. ops->qc_fill_rtf() is similar to ops->sff_tf_read() but can only be called when a command finishes. As some non-SFF controllers don't have TF registers defined unless they're associated with in-flight commands, this limited operation makes life easier for those drivers and help lifting SFF assumptions from libata core layer. Signed-off-by: Tejun Heo <htejun@gmail.com>
Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 5be8a60..5ae813f 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1408,6 +1408,25 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
}
/**
+ * ata_sff_qc_fill_rtf - fill result TF using ->sff_tf_read
+ * @qc: qc to fill result TF for
+ *
+ * @qc is finished and result TF needs to be filled. Fill it
+ * using ->sff_tf_read.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * true indicating that result TF is successfully filled.
+ */
+bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc)
+{
+ qc->ap->ops->sff_tf_read(qc->ap, &qc->result_tf);
+ return true;
+}
+
+/**
* ata_sff_host_intr - Handle host interrupt for given (port, task)
* @ap: Port on which interrupt arrived (possibly...)
* @qc: Taskfile currently active in engine
@@ -2724,6 +2743,7 @@ EXPORT_SYMBOL_GPL(ata_sff_irq_on);
EXPORT_SYMBOL_GPL(ata_sff_irq_clear);
EXPORT_SYMBOL_GPL(ata_sff_hsm_move);
EXPORT_SYMBOL_GPL(ata_sff_qc_issue);
+EXPORT_SYMBOL_GPL(ata_sff_qc_fill_rtf);
EXPORT_SYMBOL_GPL(ata_sff_host_intr);
EXPORT_SYMBOL_GPL(ata_sff_interrupt);
EXPORT_SYMBOL_GPL(ata_sff_freeze);
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