diff options
| author | Roman Kapl <rka@sysgo.com> | 2019-10-14 11:21:09 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-10-31 07:22:53 -0400 |
| commit | 6e7325533ba4edb916a1be158c43f7eee506c6c9 (patch) | |
| tree | 134dffb3c6b649207fc64a99307f61d5367cf9b3 /drivers/ata | |
| parent | 34856b0f1c4e56ad63879b9cdef71302225423cd (diff) | |
ata: ahci allow 64-bit DMA for SATA
Allow 64-bit DMA on AHCI. If not supported by the host controller, at
least print a message and fail.
Signed-off-by: Roman Kapl <rka@sysgo.com>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 21a89eba5a..d10f9f0bf8 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -50,6 +50,8 @@ struct ahci_uc_priv *probe_ent = NULL; #define WAIT_MS_FLUSH 5000 #define WAIT_MS_LINKUP 200 +#define AHCI_CAP_S64A BIT(31) + __weak void __iomem *ahci_port_base(void __iomem *base, u32 port) { return base + 0x100 + (port * 0x80); @@ -503,9 +505,15 @@ static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port, } for (i = 0; i < sg_count; i++) { - ahci_sg->addr = - cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT); - ahci_sg->addr_hi = 0; + /* We assume virt=phys */ + phys_addr_t pa = (unsigned long)buf + i * MAX_DATA_BYTE_COUNT; + + ahci_sg->addr = cpu_to_le32(lower_32_bits(pa)); + ahci_sg->addr_hi = cpu_to_le32(upper_32_bits(pa)); + if (ahci_sg->addr_hi && !(uc_priv->cap & AHCI_CAP_S64A)) { + printf("Error: DMA address too high\n"); + return -1; + } ahci_sg->flags_size = cpu_to_le32(0x3fffff & (buf_len < MAX_DATA_BYTE_COUNT ? (buf_len - 1) |