[U-Boot] [RFC PATCH 16/29] drivers: ata: ahci: fill upper 32bit buffer address in sg descriptor

[Suneel Garapati]

From: Suneel Garapati <sgarapati at marvell.com>

For platforms that support 64bit physical address, fill upper 32bit
of buffer address in scatter-gather descriptor. This is needed for
platforms with more than 4GB DRAM.

Signed-off-by: Suneel Garapati <sgarapati at marvell.com>
---
 drivers/ata/ahci.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index ca075b58bc..5f929700c0 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -506,6 +506,11 @@ static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port,
 		ahci_sg->addr =
 		    cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT);
 		ahci_sg->addr_hi = 0;
+#ifdef CONFIG_PHYS_64BIT
+		ahci_sg->addr_hi =
+		    cpu_to_le32((u32)(((u64)(buf + i * MAX_DATA_BYTE_COUNT)
+				      >> 16) >> 16));
+#endif
 		ahci_sg->flags_size = cpu_to_le32(0x3fffff &
 					  (buf_len < MAX_DATA_BYTE_COUNT
 					   ? (buf_len - 1)
-- 
2.23.0