If READ_LOG_DMA_EXT is supported we should try to use it for
reading the log pages.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/ata/libata-eh.c | 9 +++++++--
include/linux/ata.h | 7 +++++++
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index d2029a4..d35d7a7 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1510,13 +1510,18 @@ unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
ata_tf_init(dev, &tf);
- tf.command = ATA_CMD_READ_LOG_EXT;
+ if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id)) {
+ tf.command = ATA_CMD_READ_LOG_DMA_EXT;
+ tf.protocol = ATA_PROT_DMA;
+ } else {
+ tf.command = ATA_CMD_READ_LOG_EXT;
+ tf.protocol = ATA_PROT_PIO;
+ }
tf.lbal = log;
tf.lbam = page;
tf.nsect = sectors;
tf.hob_nsect = sectors >> 8;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_PIO;
err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
buf, sectors * ATA_SECT_SIZE, 0);
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 1648026..681520f 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -696,6 +696,13 @@ static inline bool ata_id_wcache_enabled(const u16 *id)
return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
}
+static inline bool ata_id_has_read_log_dma_ext(const u16 *id)
+{
+ if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
+ return false;
+ return id[ATA_ID_COMMAND_SET_3] & (1 << 3);
+}
+
/**
* ata_id_major_version - get ATA level of drive
* @id: Identify data
--
1.8.5.2
--
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