diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2007-10-11 04:58:31 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2007-10-11 10:40:47 (GMT) |
commit | 7465ce0db310d2fa29f721da7e3aacd1dad7090f (patch) | |
tree | ce8cd473877948310b2e86f685ab09686b79ea23 /arch/powerpc/platforms/iseries/vio.c | |
parent | b833b481c10cf591b15cc674948cc514e55d3b94 (diff) | |
download | linux-fsl-qoriq-7465ce0db310d2fa29f721da7e3aacd1dad7090f.tar.xz |
[POWERPC] iSeries: Move detection of virtual tapes
Now we will only have entries in the device tree for the actual existing
devices (including their OS/400 properties). This way viotape.c gets
all the information about the devices from the device tree.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/iseries/vio.c')
-rw-r--r-- | arch/powerpc/platforms/iseries/vio.c | 149 |
1 files changed, 133 insertions, 16 deletions
diff --git a/arch/powerpc/platforms/iseries/vio.c b/arch/powerpc/platforms/iseries/vio.c index f61a974..a4cc990 100644 --- a/arch/powerpc/platforms/iseries/vio.c +++ b/arch/powerpc/platforms/iseries/vio.c @@ -45,6 +45,18 @@ #define FIRST_VIOTAPE (FIRST_VIOCD + NUM_VIOCDS) #define NUM_VIOTAPES HVMAXARCHITECTEDVIRTUALTAPES +struct vio_waitevent { + struct completion com; + int rc; + u16 sub_result; +}; + +struct vio_resource { + char rsrcname[10]; + char type[4]; + char model[3]; +}; + static struct property * __init new_property(const char *name, int length, const void *value) { @@ -123,22 +135,10 @@ static int __init add_raw_property(struct device_node *np, const char *name, return 1; } -struct viocd_waitevent { - struct completion com; - int rc; - u16 sub_result; -}; - -struct cdrom_info { - char rsrcname[10]; - char type[4]; - char model[3]; -}; - static void __init handle_cd_event(struct HvLpEvent *event) { struct viocdlpevent *bevent; - struct viocd_waitevent *pwe; + struct vio_waitevent *pwe; if (!event) /* Notification that a partition went away! */ @@ -158,7 +158,7 @@ static void __init handle_cd_event(struct HvLpEvent *event) switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { case viocdgetinfo: - pwe = (struct viocd_waitevent *)event->xCorrelationToken; + pwe = (struct vio_waitevent *)event->xCorrelationToken; pwe->rc = event->xRc; pwe->sub_result = bevent->sub_result; complete(&pwe->com); @@ -179,8 +179,8 @@ static void __init get_viocd_info(struct device_node *vio_root) { HvLpEvent_Rc hvrc; u32 unit; - struct viocd_waitevent we; - struct cdrom_info *unitinfo; + struct vio_waitevent we; + struct vio_resource *unitinfo; dma_addr_t unitinfo_dmaaddr; int ret; @@ -286,6 +286,122 @@ static void __init get_viocd_info(struct device_node *vio_root) viopath_close(viopath_hostLp, viomajorsubtype_cdio, 2); } +/* Handle interrupt events for tape */ +static void __init handle_tape_event(struct HvLpEvent *event) +{ + struct vio_waitevent *we; + struct viotapelpevent *tevent = (struct viotapelpevent *)event; + + if (event == NULL) + /* Notification that a partition went away! */ + return; + + we = (struct vio_waitevent *)event->xCorrelationToken; + switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) { + case viotapegetinfo: + we->rc = tevent->sub_type_result; + complete(&we->com); + break; + default: + printk(KERN_WARNING "handle_tape_event: weird ack\n"); + } +} + +static void __init get_viotape_info(struct device_node *vio_root) +{ + HvLpEvent_Rc hvrc; + u32 unit; + struct vio_resource *unitinfo; + dma_addr_t unitinfo_dmaaddr; + size_t len = sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALTAPES; + struct vio_waitevent we; + int ret; + + ret = viopath_open(viopath_hostLp, viomajorsubtype_tape, 2); + if (ret) { + printk(KERN_WARNING "get_viotape_info: " + "error on viopath_open to hostlp %d\n", ret); + return; + } + + vio_setHandler(viomajorsubtype_tape, handle_tape_event); + + unitinfo = iseries_hv_alloc(len, &unitinfo_dmaaddr, GFP_ATOMIC); + if (!unitinfo) + goto clear_handler; + + memset(unitinfo, 0, len); + + hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp, + HvLpEvent_Type_VirtualIo, + viomajorsubtype_tape | viotapegetinfo, + HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, + viopath_sourceinst(viopath_hostLp), + viopath_targetinst(viopath_hostLp), + (u64)(unsigned long)&we, VIOVERSION << 16, + unitinfo_dmaaddr, len, 0, 0); + if (hvrc != HvLpEvent_Rc_Good) { + printk(KERN_WARNING "get_viotape_info: hv error on op %d\n", + (int)hvrc); + goto hv_free; + } + + wait_for_completion(&we.com); + + for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALTAPES) && + unitinfo[unit].rsrcname[0]; unit++) { + struct device_node *np; + char name[64]; + u32 reg = FIRST_VIOTAPE + unit; + + snprintf(name, sizeof(name), "/vdevice/viotape@%08x", reg); + np = new_node(name, vio_root); + if (!np) + goto hv_free; + if (!add_string_property(np, "name", "viotape") || + !add_string_property(np, "device_type", "byte") || + !add_string_property(np, "compatible", + "IBM,iSeries-viotape") || + !add_raw_property(np, "reg", sizeof(reg), ®) || + !add_raw_property(np, "linux,unit_address", + sizeof(unit), &unit) || + !add_raw_property(np, "linux,vio_rsrcname", + sizeof(unitinfo[unit].rsrcname), + unitinfo[unit].rsrcname) || + !add_raw_property(np, "linux,vio_type", + sizeof(unitinfo[unit].type), + unitinfo[unit].type) || + !add_raw_property(np, "linux,vio_model", + sizeof(unitinfo[unit].model), + unitinfo[unit].model)) + goto node_free; + np->name = of_get_property(np, "name", NULL); + np->type = of_get_property(np, "device_type", NULL); + of_attach_node(np); +#ifdef CONFIG_PROC_DEVICETREE + if (vio_root->pde) { + struct proc_dir_entry *ent; + + ent = proc_mkdir(strrchr(np->full_name, '/') + 1, + vio_root->pde); + if (ent) + proc_device_tree_add_node(np, ent); + } +#endif + continue; + + node_free: + free_node(np); + break; + } + + hv_free: + iseries_hv_free(len, unitinfo, unitinfo_dmaaddr); + clear_handler: + vio_clearHandler(viomajorsubtype_tape); + viopath_close(viopath_hostLp, viomajorsubtype_tape, 2); +} + static int __init iseries_vio_init(void) { struct device_node *vio_root; @@ -307,6 +423,7 @@ static int __init iseries_vio_init(void) } get_viocd_info(vio_root); + get_viotape_info(vio_root); return 0; |