On Tue, 29 Oct 2019 at 14:08, Suneel Garapati suneelglinux@gmail.com wrote:
From: Suneel Garapati sgarapati@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@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));
How about something like:
ulong addr = (ulong)buf + i * MAX_DATA_BYTE_COUNT;
ahci_sg->addr = cpu_to_le32(addr); ahci_sg->addr_hi = 0; #ifdef CONFIG_PHYS_64BIT ahci_sg->addr_hi = addr >> 32ULL; #endif
Regards, Simon