[POWERPC] iSeries: Move detection of virtual cdroms
Now we will only have entries in the device tree for the actual existing devices (including their OS/400 properties). This way viocd.c gets all the information about the devices from the device tree. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stephen Rothwell
Paul Mackerras
parent
dd9b67ab37
commit
b833b481c1
6 changed files with 361 additions and 105 deletions
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@ -247,9 +247,6 @@ static int __init vio_bus_init(void)
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int err;
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struct device_node *node_vroot;
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if (firmware_has_feature(FW_FEATURE_ISERIES))
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iommu_vio_init();
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err = bus_register(&vio_bus_type);
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if (err) {
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printk(KERN_ERR "failed to register VIO bus\n");
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@ -7,7 +7,7 @@ obj-y += hvlog.o hvlpconfig.o lpardata.o setup.o dt_mod.o mf.o lpevents.o \
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hvcall.o proc.o htab.o iommu.o misc.o irq.o
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obj-$(CONFIG_PCI) += pci.o vpdinfo.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_VIOPATH) += viopath.o
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obj-$(CONFIG_VIOPATH) += viopath.o vio.o
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obj-$(CONFIG_MODULES) += ksyms.o
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quiet_cmd_dt_strings = DT_STR $@
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@ -381,10 +381,6 @@ static void __init dt_vdevices(struct iseries_flat_dt *dt)
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dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
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"IBM,iSeries-viodasd", 1);
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reg += HVMAXARCHITECTEDVIRTUALDISKS;
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
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dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
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"IBM,iSeries-viocd", 1);
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reg += HVMAXARCHITECTEDVIRTUALCDROMS;
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
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317
arch/powerpc/platforms/iseries/vio.c
Normal file
317
arch/powerpc/platforms/iseries/vio.c
Normal file
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@ -0,0 +1,317 @@
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/*
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* Legacy iSeries specific vio initialisation
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* that needs to be built in (not a module).
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*
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* © Copyright 2007 IBM Corporation
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* Author: Stephen Rothwell
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* Some parts collected from various other files
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/of.h>
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#include <linux/init.h>
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#include <linux/gfp.h>
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#include <linux/completion.h>
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#include <linux/proc_fs.h>
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#include <asm/firmware.h>
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#include <asm/iseries/vio.h>
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#include <asm/iseries/iommu.h>
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#include <asm/iseries/hv_types.h>
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#include <asm/iseries/hv_lp_event.h>
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#define FIRST_VTY 0
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#define NUM_VTYS 1
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#define FIRST_VSCSI (FIRST_VTY + NUM_VTYS)
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#define NUM_VSCSIS 1
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#define FIRST_VLAN (FIRST_VSCSI + NUM_VSCSIS)
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#define NUM_VLANS HVMAXARCHITECTEDVIRTUALLANS
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#define FIRST_VIODASD (FIRST_VLAN + NUM_VLANS)
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#define NUM_VIODASDS HVMAXARCHITECTEDVIRTUALDISKS
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#define FIRST_VIOCD (FIRST_VIODASD + NUM_VIODASDS)
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#define NUM_VIOCDS HVMAXARCHITECTEDVIRTUALCDROMS
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#define FIRST_VIOTAPE (FIRST_VIOCD + NUM_VIOCDS)
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#define NUM_VIOTAPES HVMAXARCHITECTEDVIRTUALTAPES
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static struct property * __init new_property(const char *name, int length,
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const void *value)
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{
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struct property *np = kzalloc(sizeof(*np) + strlen(name) + 1 + length,
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GFP_KERNEL);
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if (!np)
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return NULL;
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np->name = (char *)(np + 1);
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np->value = np->name + strlen(name) + 1;
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strcpy(np->name, name);
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memcpy(np->value, value, length);
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np->length = length;
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return np;
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}
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static void __init free_property(struct property *np)
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{
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kfree(np);
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}
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static struct device_node * __init new_node(const char *path,
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struct device_node *parent)
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{
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struct device_node *np = kzalloc(sizeof(*np), GFP_KERNEL);
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if (!np)
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return NULL;
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np->full_name = kmalloc(strlen(path) + 1, GFP_KERNEL);
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if (!np->full_name) {
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kfree(np);
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return NULL;
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}
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strcpy(np->full_name, path);
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of_node_set_flag(np, OF_DYNAMIC);
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kref_init(&np->kref);
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np->parent = of_node_get(parent);
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return np;
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}
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static void __init free_node(struct device_node *np)
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{
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struct property *next;
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struct property *prop;
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next = np->properties;
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while (next) {
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prop = next;
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next = prop->next;
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free_property(prop);
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}
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of_node_put(np->parent);
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kfree(np->full_name);
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kfree(np);
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}
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static int __init add_string_property(struct device_node *np, const char *name,
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const char *value)
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{
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struct property *nprop = new_property(name, strlen(value) + 1, value);
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if (!nprop)
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return 0;
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prom_add_property(np, nprop);
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return 1;
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}
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static int __init add_raw_property(struct device_node *np, const char *name,
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int length, const void *value)
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{
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struct property *nprop = new_property(name, length, value);
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if (!nprop)
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return 0;
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prom_add_property(np, nprop);
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return 1;
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}
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struct viocd_waitevent {
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struct completion com;
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int rc;
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u16 sub_result;
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};
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struct cdrom_info {
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char rsrcname[10];
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char type[4];
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char model[3];
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};
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static void __init handle_cd_event(struct HvLpEvent *event)
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{
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struct viocdlpevent *bevent;
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struct viocd_waitevent *pwe;
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if (!event)
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/* Notification that a partition went away! */
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return;
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/* First, we should NEVER get an int here...only acks */
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if (hvlpevent_is_int(event)) {
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printk(KERN_WARNING "handle_cd_event: got an unexpected int\n");
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if (hvlpevent_need_ack(event)) {
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event->xRc = HvLpEvent_Rc_InvalidSubtype;
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HvCallEvent_ackLpEvent(event);
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}
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return;
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}
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bevent = (struct viocdlpevent *)event;
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switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
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case viocdgetinfo:
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pwe = (struct viocd_waitevent *)event->xCorrelationToken;
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pwe->rc = event->xRc;
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pwe->sub_result = bevent->sub_result;
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complete(&pwe->com);
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break;
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default:
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printk(KERN_WARNING "handle_cd_event: "
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"message with unexpected subtype %0x04X!\n",
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event->xSubtype & VIOMINOR_SUBTYPE_MASK);
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if (hvlpevent_need_ack(event)) {
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event->xRc = HvLpEvent_Rc_InvalidSubtype;
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HvCallEvent_ackLpEvent(event);
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}
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}
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}
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static void __init get_viocd_info(struct device_node *vio_root)
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{
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HvLpEvent_Rc hvrc;
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u32 unit;
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struct viocd_waitevent we;
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struct cdrom_info *unitinfo;
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dma_addr_t unitinfo_dmaaddr;
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int ret;
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ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio, 2);
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if (ret) {
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printk(KERN_WARNING
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"get_viocd_info: error opening path to host partition %d\n",
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viopath_hostLp);
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return;
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}
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/* Initialize our request handler */
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vio_setHandler(viomajorsubtype_cdio, handle_cd_event);
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unitinfo = iseries_hv_alloc(
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sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS,
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&unitinfo_dmaaddr, GFP_ATOMIC);
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if (!unitinfo) {
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printk(KERN_WARNING
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"get_viocd_info: error allocating unitinfo\n");
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goto clear_handler;
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}
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memset(unitinfo, 0, sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS);
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init_completion(&we.com);
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_cdio | viocdgetinfo,
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HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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(u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0,
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sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS, 0);
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if (hvrc != HvLpEvent_Rc_Good) {
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printk(KERN_WARNING
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"get_viocd_info: cdrom error sending event. rc %d\n",
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(int)hvrc);
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goto hv_free;
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}
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wait_for_completion(&we.com);
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if (we.rc) {
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printk(KERN_WARNING "get_viocd_info: bad rc %d:0x%04X\n",
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we.rc, we.sub_result);
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goto hv_free;
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}
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for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALCDROMS) &&
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unitinfo[unit].rsrcname[0]; unit++) {
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struct device_node *np;
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char name[64];
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u32 reg = FIRST_VIOCD + unit;
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snprintf(name, sizeof(name), "/vdevice/viocd@%08x", reg);
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np = new_node(name, vio_root);
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if (!np)
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goto hv_free;
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if (!add_string_property(np, "name", "viocd") ||
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!add_string_property(np, "device_type", "block") ||
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!add_string_property(np, "compatible",
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"IBM,iSeries-viocd") ||
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!add_raw_property(np, "reg", sizeof(reg), ®) ||
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!add_raw_property(np, "linux,unit_address",
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sizeof(unit), &unit) ||
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!add_raw_property(np, "linux,vio_rsrcname",
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sizeof(unitinfo[unit].rsrcname),
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unitinfo[unit].rsrcname) ||
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!add_raw_property(np, "linux,vio_type",
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sizeof(unitinfo[unit].type),
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unitinfo[unit].type) ||
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!add_raw_property(np, "linux,vio_model",
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sizeof(unitinfo[unit].model),
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unitinfo[unit].model))
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goto node_free;
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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of_attach_node(np);
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#ifdef CONFIG_PROC_DEVICETREE
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if (vio_root->pde) {
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struct proc_dir_entry *ent;
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ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
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vio_root->pde);
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if (ent)
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proc_device_tree_add_node(np, ent);
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}
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#endif
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continue;
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node_free:
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free_node(np);
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break;
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}
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hv_free:
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iseries_hv_free(sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALCDROMS,
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unitinfo, unitinfo_dmaaddr);
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clear_handler:
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vio_clearHandler(viomajorsubtype_cdio);
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viopath_close(viopath_hostLp, viomajorsubtype_cdio, 2);
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}
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static int __init iseries_vio_init(void)
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{
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struct device_node *vio_root;
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if (!firmware_has_feature(FW_FEATURE_ISERIES))
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return -ENODEV;
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iommu_vio_init();
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vio_root = of_find_node_by_path("/vdevice");
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if (!vio_root)
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return -ENODEV;
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if (viopath_hostLp == HvLpIndexInvalid) {
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vio_set_hostlp();
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/* If we don't have a host, bail out */
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if (viopath_hostLp == HvLpIndexInvalid)
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goto put_node;
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}
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get_viocd_info(vio_root);
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return 0;
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put_node:
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of_node_put(vio_root);
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return -ENODEV;
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}
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arch_initcall(iseries_vio_init);
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@ -56,30 +56,6 @@
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#define VIOCD_KERN_WARNING KERN_WARNING "viocd: "
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#define VIOCD_KERN_INFO KERN_INFO "viocd: "
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struct viocdlpevent {
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struct HvLpEvent event;
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u32 reserved;
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u16 version;
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u16 sub_result;
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u16 disk;
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u16 flags;
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u32 token;
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u64 offset; /* On open, max number of disks */
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u64 len; /* On open, size of the disk */
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u32 block_size; /* Only set on open */
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u32 media_size; /* Only set on open */
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};
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enum viocdsubtype {
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viocdopen = 0x0001,
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viocdclose = 0x0002,
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viocdread = 0x0003,
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viocdwrite = 0x0004,
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viocdlockdoor = 0x0005,
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viocdgetinfo = 0x0006,
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viocdcheck = 0x0007
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};
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/*
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* Should probably make this a module parameter....sigh
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*/
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@ -131,17 +107,13 @@ static struct capability_entry capability_table[] __initdata = {
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/* These are our internal structures for keeping track of devices */
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static int viocd_numdev;
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struct cdrom_info {
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char rsrcname[10];
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char type[4];
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char model[3];
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};
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struct disk_info {
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struct gendisk *viocd_disk;
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struct cdrom_device_info viocd_info;
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struct device *dev;
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struct cdrom_info unitinfo;
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const char *rsrcname;
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const char *type;
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const char *model;
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};
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static struct disk_info viocd_diskinfo[VIOCD_MAX_CD];
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@ -159,9 +131,9 @@ static int proc_viocd_show(struct seq_file *m, void *v)
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for (i = 0; i < viocd_numdev; i++) {
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seq_printf(m, "viocd device %d is iSeries resource %10.10s"
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"type %4.4s, model %3.3s\n",
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i, viocd_diskinfo[i].unitinfo.rsrcname,
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viocd_diskinfo[i].unitinfo.type,
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viocd_diskinfo[i].unitinfo.model);
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i, viocd_diskinfo[i].rsrcname,
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viocd_diskinfo[i].type,
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viocd_diskinfo[i].model);
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}
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return 0;
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}
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@ -211,61 +183,6 @@ struct block_device_operations viocd_fops = {
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.media_changed = viocd_blk_media_changed,
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};
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/* Get info on CD devices from OS/400 */
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static void __init get_viocd_info(void)
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{
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HvLpEvent_Rc hvrc;
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int i;
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struct viocd_waitevent we;
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struct cdrom_info *viocd_unitinfo;
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dma_addr_t unitinfo_dmaaddr;
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viocd_unitinfo = iseries_hv_alloc(
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sizeof(*viocd_unitinfo) * VIOCD_MAX_CD,
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&unitinfo_dmaaddr, GFP_ATOMIC);
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if (viocd_unitinfo == NULL) {
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printk(VIOCD_KERN_WARNING "error allocating unitinfo\n");
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return;
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}
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memset(viocd_unitinfo, 0, sizeof(*viocd_unitinfo) * VIOCD_MAX_CD);
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init_completion(&we.com);
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_cdio | viocdgetinfo,
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HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
|
||||
(u64)&we, VIOVERSION << 16, unitinfo_dmaaddr, 0,
|
||||
sizeof(*viocd_unitinfo) * VIOCD_MAX_CD, 0);
|
||||
if (hvrc != HvLpEvent_Rc_Good) {
|
||||
printk(VIOCD_KERN_WARNING "cdrom error sending event. rc %d\n",
|
||||
(int)hvrc);
|
||||
goto error_ret;
|
||||
}
|
||||
|
||||
wait_for_completion(&we.com);
|
||||
|
||||
if (we.rc) {
|
||||
const struct vio_error_entry *err =
|
||||
vio_lookup_rc(viocd_err_table, we.sub_result);
|
||||
printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on getinfo: %s\n",
|
||||
we.rc, we.sub_result, err->msg);
|
||||
goto error_ret;
|
||||
}
|
||||
|
||||
for (i = 0; (i < VIOCD_MAX_CD) && viocd_unitinfo[i].rsrcname[0]; i++) {
|
||||
viocd_diskinfo[viocd_numdev].unitinfo = viocd_unitinfo[i];
|
||||
viocd_numdev++;
|
||||
}
|
||||
|
||||
error_ret:
|
||||
iseries_hv_free(sizeof(*viocd_unitinfo) * VIOCD_MAX_CD,
|
||||
viocd_unitinfo, unitinfo_dmaaddr);
|
||||
}
|
||||
|
||||
static int viocd_open(struct cdrom_device_info *cdi, int purpose)
|
||||
{
|
||||
struct disk_info *diskinfo = cdi->handle;
|
||||
|
|
@ -576,7 +493,6 @@ static void vio_handle_cd_event(struct HvLpEvent *event)
|
|||
bevent->block_size / 512);
|
||||
}
|
||||
/* FALLTHROUGH !! */
|
||||
case viocdgetinfo:
|
||||
case viocdlockdoor:
|
||||
pwe = (struct viocd_waitevent *)event->xCorrelationToken;
|
||||
return_complete:
|
||||
|
|
@ -660,22 +576,30 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|||
int deviceno;
|
||||
struct disk_info *d;
|
||||
struct cdrom_device_info *c;
|
||||
struct cdrom_info *ci;
|
||||
struct request_queue *q;
|
||||
struct device_node *node = vdev->dev.archdata.of_node;
|
||||
|
||||
deviceno = vdev->unit_address;
|
||||
if (deviceno >= viocd_numdev)
|
||||
if (deviceno > VIOCD_MAX_CD)
|
||||
return -ENODEV;
|
||||
if (!node)
|
||||
return -ENODEV;
|
||||
|
||||
if (deviceno >= viocd_numdev)
|
||||
viocd_numdev = deviceno + 1;
|
||||
|
||||
d = &viocd_diskinfo[deviceno];
|
||||
d->rsrcname = of_get_property(node, "linux,vio_rsrcname", NULL);
|
||||
d->type = of_get_property(node, "linux,vio_type", NULL);
|
||||
d->model = of_get_property(node, "linux,vio_model", NULL);
|
||||
|
||||
c = &d->viocd_info;
|
||||
ci = &d->unitinfo;
|
||||
|
||||
c->ops = &viocd_dops;
|
||||
c->speed = 4;
|
||||
c->capacity = 1;
|
||||
c->handle = d;
|
||||
c->mask = ~find_capability(ci->type);
|
||||
c->mask = ~find_capability(d->type);
|
||||
sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno);
|
||||
|
||||
if (register_cdrom(c) != 0) {
|
||||
|
|
@ -685,7 +609,7 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
|||
}
|
||||
printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s "
|
||||
"type %4.4s, model %3.3s\n",
|
||||
c->name, ci->rsrcname, ci->type, ci->model);
|
||||
c->name, d->rsrcname, d->type, d->model);
|
||||
q = blk_init_queue(do_viocd_request, &viocd_reqlock);
|
||||
if (q == NULL) {
|
||||
printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n",
|
||||
|
|
@ -794,8 +718,6 @@ static int __init viocd_init(void)
|
|||
/* Initialize our request handler */
|
||||
vio_setHandler(viomajorsubtype_cdio, vio_handle_cd_event);
|
||||
|
||||
get_viocd_info();
|
||||
|
||||
spin_lock_init(&viocd_reqlock);
|
||||
|
||||
ret = vio_register_driver(&viocd_driver);
|
||||
|
|
|
|||
|
|
@ -51,6 +51,30 @@
|
|||
*/
|
||||
#define VIO_MAX_SUBTYPES 8
|
||||
|
||||
struct viocdlpevent {
|
||||
struct HvLpEvent event;
|
||||
u32 reserved;
|
||||
u16 version;
|
||||
u16 sub_result;
|
||||
u16 disk;
|
||||
u16 flags;
|
||||
u32 token;
|
||||
u64 offset; /* On open, max number of disks */
|
||||
u64 len; /* On open, size of the disk */
|
||||
u32 block_size; /* Only set on open */
|
||||
u32 media_size; /* Only set on open */
|
||||
};
|
||||
|
||||
enum viocdsubtype {
|
||||
viocdopen = 0x0001,
|
||||
viocdclose = 0x0002,
|
||||
viocdread = 0x0003,
|
||||
viocdwrite = 0x0004,
|
||||
viocdlockdoor = 0x0005,
|
||||
viocdgetinfo = 0x0006,
|
||||
viocdcheck = 0x0007
|
||||
};
|
||||
|
||||
/*
|
||||
* Each subtype can register a handler to process their events.
|
||||
* The handler must have this interface.
|
||||
|
|
|
|||
Loading…
Reference in a new issue