diff options
Diffstat (limited to 'drivers/misc/sgi-xp/xp_uv.c')
| -rw-r--r-- | drivers/misc/sgi-xp/xp_uv.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/misc/sgi-xp/xp_uv.c b/drivers/misc/sgi-xp/xp_uv.c index 1e61f8a61a30..a0d093274dc0 100644 --- a/drivers/misc/sgi-xp/xp_uv.c +++ b/drivers/misc/sgi-xp/xp_uv.c @@ -42,11 +42,34 @@ xp_socket_pa_uv(unsigned long gpa) } static enum xp_retval +xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa, + size_t len) +{ + int ret; + unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa)); + + BUG_ON(!uv_gpa_in_mmr_space(src_gpa)); + BUG_ON(len != 8); + + ret = gru_read_gpa(dst_va, src_gpa); + if (ret == 0) + return xpSuccess; + + dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " + "len=%ld\n", dst_gpa, src_gpa, len); + return xpGruCopyError; +} + + +static enum xp_retval xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa, size_t len) { int ret; + if (uv_gpa_in_mmr_space(src_gpa)) + return xp_remote_mmr_read(dst_gpa, src_gpa, len); + ret = gru_copy_gpa(dst_gpa, src_gpa, len); if (ret == 0) return xpSuccess; |