diff options
author | Prarit Bhargava <prarit@sgi.com> | 2006-01-16 21:31:52 +0100 |
---|---|---|
committer | Tony Luck <tony.luck@intel.com> | 2006-01-17 19:08:37 +0100 |
commit | 5f7f5b0c99c9c913b649d065a9773e6ed4ed8168 (patch) | |
tree | 60ea9e7eba43503d5b1d3d1a3b557a363d34c810 | |
parent | Linux v2.6.16-rc1 (diff) | |
download | linux-5f7f5b0c99c9c913b649d065a9773e6ed4ed8168.tar.xz linux-5f7f5b0c99c9c913b649d065a9773e6ed4ed8168.zip |
[IA64-SGI] Older PROM WAR for device flush code
Work-around to temporarily support older PROMs with new flush device code.
This code allows systems running older PROMs to continue to run on the new
kernel base until a new official PROM is released.
Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r-- | arch/ia64/sn/include/xtalk/hubdev.h | 9 | ||||
-rw-r--r-- | arch/ia64/sn/kernel/io_init.c | 54 |
2 files changed, 60 insertions, 3 deletions
diff --git a/arch/ia64/sn/include/xtalk/hubdev.h b/arch/ia64/sn/include/xtalk/hubdev.h index 7c88e9a58516..8182583c762c 100644 --- a/arch/ia64/sn/include/xtalk/hubdev.h +++ b/arch/ia64/sn/include/xtalk/hubdev.h @@ -51,6 +51,15 @@ struct sn_flush_device_kernel { struct sn_flush_device_common *common; }; +/* 01/16/06 This struct is the old PROM/kernel struct and needs to be included + * for older official PROMs to function on the new kernel base. This struct + * will be removed when the next official PROM release occurs. */ + +struct sn_flush_device_war { + struct sn_flush_device_common common; + u32 filler; /* older PROMs expect the default size of a spinlock_t */ +}; + /* * **widget_p - Used as an array[wid_num][device] of sn_flush_device_kernel. */ diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c index 233d55115d33..00700f7e6837 100644 --- a/arch/ia64/sn/kernel/io_init.c +++ b/arch/ia64/sn/kernel/io_init.c @@ -165,8 +165,45 @@ sn_pcidev_info_get(struct pci_dev *dev) return NULL; } +/* Older PROM flush WAR + * + * 01/16/06 -- This war will be in place until a new official PROM is released. + * Additionally note that the struct sn_flush_device_war also has to be + * removed from arch/ia64/sn/include/xtalk/hubdev.h + */ +static u8 war_implemented = 0; + +static void sn_device_fixup_war(u64 nasid, u64 widget, int device, + struct sn_flush_device_common *common) +{ + struct sn_flush_device_war *war_list; + struct sn_flush_device_war *dev_entry; + struct ia64_sal_retval isrv = {0,0,0,0}; + + if (!war_implemented) { + printk(KERN_WARNING "PROM version < 4.50 -- implementing old " + "PROM flush WAR\n"); + war_implemented = 1; + } + + war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL); + if (!war_list) + BUG(); + + SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST, + nasid, widget, __pa(war_list), 0, 0, 0 ,0); + if (isrv.status) + panic("sn_device_fixup_war failed: %s\n", + ia64_sal_strerror(isrv.status)); + + dev_entry = war_list + device; + memcpy(common,dev_entry, sizeof(*common)); + + kfree(war_list); +} + /* - * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for + * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for * each node in the system. */ static void sn_fixup_ionodes(void) @@ -246,8 +283,19 @@ static void sn_fixup_ionodes(void) widget, device, (u64)(dev_entry->common)); - if (status) - BUG(); + if (status) { + if (sn_sal_rev() < 0x0450) { + /* shortlived WAR for older + * PROM images + */ + sn_device_fixup_war(nasid, + widget, + device, + dev_entry->common); + } + else + BUG(); + } spin_lock_init(&dev_entry->sfdl_flush_lock); } |