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Code Issues Releases Wiki Activity

vfio/ccw: Use functions for alloc/free of the vfio_ccw_private

Browse source 
Makes the code easier to understand what is memory lifecycle and what is
other stuff.

Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/2-v4-cea4f5bd2c00+b52-ccw_mdev_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe 2021-10-26 14:57:31 -03:00 committed by Alex Williamson
parent d0a9329d46
commit 0972c7dddf
1 changed files with 78 additions and 59 deletions
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137
drivers/s390/cio/vfio_ccw_drv.c
View file

@ -137,16 +137,80 @@ static void vfio_ccw_sch_irq(struct subchannel *sch)
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT);
}
static void vfio_ccw_free_regions(struct vfio_ccw_private *private)
static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch)
{
if (private->crw_region)
kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
if (private->schib_region)
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
if (private->cmd_region)
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
if (private->io_region)
kmem_cache_free(vfio_ccw_io_region, private->io_region);
struct vfio_ccw_private *private;
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (!private)
return ERR_PTR(-ENOMEM);
private->sch = sch;
mutex_init(&private->io_mutex);
private->state = VFIO_CCW_STATE_NOT_OPER;
INIT_LIST_HEAD(&private->crw);
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
INIT_WORK(&private->crw_work, vfio_ccw_crw_todo);
atomic_set(&private->avail, 1);
private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1),
GFP_KERNEL);
if (!private->cp.guest_cp)
goto out_free_private;
private->io_region = kmem_cache_zalloc(vfio_ccw_io_region,
GFP_KERNEL | GFP_DMA);
if (!private->io_region)
goto out_free_cp;
private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region,
GFP_KERNEL | GFP_DMA);
if (!private->cmd_region)
goto out_free_io;
private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region,
GFP_KERNEL | GFP_DMA);
if (!private->schib_region)
goto out_free_cmd;
private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region,
GFP_KERNEL | GFP_DMA);
if (!private->crw_region)
goto out_free_schib;
return private;
out_free_schib:
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
out_free_cmd:
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
out_free_io:
kmem_cache_free(vfio_ccw_io_region, private->io_region);
out_free_cp:
kfree(private->cp.guest_cp);
out_free_private:
mutex_destroy(&private->io_mutex);
kfree(private);
return ERR_PTR(-ENOMEM);
}
static void vfio_ccw_free_private(struct vfio_ccw_private *private)
{
struct vfio_ccw_crw *crw, *temp;
list_for_each_entry_safe(crw, temp, &private->crw, next) {
list_del(&crw->next);
kfree(crw);
}
kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
kmem_cache_free(vfio_ccw_io_region, private->io_region);
kfree(private->cp.guest_cp);
mutex_destroy(&private->io_mutex);
kfree(private);
}
static int vfio_ccw_sch_probe(struct subchannel *sch)
@ -161,53 +225,19 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
return -ENODEV;
}
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (!private)
return -ENOMEM;
private = vfio_ccw_alloc_private(sch);
if (IS_ERR(private))
return PTR_ERR(private);
private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1),
GFP_KERNEL);
if (!private->cp.guest_cp)
goto out_free;
private->io_region = kmem_cache_zalloc(vfio_ccw_io_region,
GFP_KERNEL | GFP_DMA);
if (!private->io_region)
goto out_free;
private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region,
GFP_KERNEL | GFP_DMA);
if (!private->cmd_region)
goto out_free;
private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region,
GFP_KERNEL | GFP_DMA);
if (!private->schib_region)
goto out_free;
private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region,
GFP_KERNEL | GFP_DMA);
if (!private->crw_region)
goto out_free;
private->sch = sch;
dev_set_drvdata(&sch->dev, private);
mutex_init(&private->io_mutex);
spin_lock_irq(sch->lock);
private->state = VFIO_CCW_STATE_NOT_OPER;
sch->isc = VFIO_CCW_ISC;
ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
spin_unlock_irq(sch->lock);
if (ret)
goto out_free;
INIT_LIST_HEAD(&private->crw);
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
INIT_WORK(&private->crw_work, vfio_ccw_crw_todo);
atomic_set(&private->avail, 1);
private->state = VFIO_CCW_STATE_STANDBY;
ret = vfio_ccw_mdev_reg(sch);
@ -228,31 +258,20 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
cio_disable_subchannel(sch);
out_free:
dev_set_drvdata(&sch->dev, NULL);
vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
vfio_ccw_free_private(private);
return ret;
}
static void vfio_ccw_sch_remove(struct subchannel *sch)
{
struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
struct vfio_ccw_crw *crw, *temp;
vfio_ccw_sch_quiesce(sch);
list_for_each_entry_safe(crw, temp, &private->crw, next) {
list_del(&crw->next);
kfree(crw);
}
vfio_ccw_mdev_unreg(sch);
dev_set_drvdata(&sch->dev, NULL);
vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
vfio_ccw_free_private(private);
VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n",
sch->schid.cssid, sch->schid.ssid,