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Diffstat (limited to 'arch/powerpc/kernel/vio.c')
-rw-r--r--arch/powerpc/kernel/vio.c113
1 files changed, 68 insertions, 45 deletions
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 78a350670de..904c66128fa 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -518,16 +518,18 @@ static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
struct dma_attrs *attrs)
{
struct vio_dev *viodev = to_vio_dev(dev);
+ struct iommu_table *tbl;
dma_addr_t ret = DMA_ERROR_CODE;
- if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE))) {
+ tbl = get_iommu_table_base(dev);
+ if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)))) {
atomic_inc(&viodev->cmo.allocs_failed);
return ret;
}
ret = dma_iommu_ops.map_page(dev, page, offset, size, direction, attrs);
if (unlikely(dma_mapping_error(dev, ret))) {
- vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+ vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)));
atomic_inc(&viodev->cmo.allocs_failed);
}
@@ -540,10 +542,12 @@ static void vio_dma_iommu_unmap_page(struct device *dev, dma_addr_t dma_handle,
struct dma_attrs *attrs)
{
struct vio_dev *viodev = to_vio_dev(dev);
+ struct iommu_table *tbl;
+ tbl = get_iommu_table_base(dev);
dma_iommu_ops.unmap_page(dev, dma_handle, size, direction, attrs);
- vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+ vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)));
}
static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
@@ -551,12 +555,14 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
struct dma_attrs *attrs)
{
struct vio_dev *viodev = to_vio_dev(dev);
+ struct iommu_table *tbl;
struct scatterlist *sgl;
int ret, count = 0;
size_t alloc_size = 0;
+ tbl = get_iommu_table_base(dev);
for (sgl = sglist; count < nelems; count++, sgl++)
- alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE);
+ alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE(tbl));
if (vio_cmo_alloc(viodev, alloc_size)) {
atomic_inc(&viodev->cmo.allocs_failed);
@@ -572,7 +578,7 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
}
for (sgl = sglist, count = 0; count < ret; count++, sgl++)
- alloc_size -= roundup(sgl->dma_length, IOMMU_PAGE_SIZE);
+ alloc_size -= roundup(sgl->dma_length, IOMMU_PAGE_SIZE(tbl));
if (alloc_size)
vio_cmo_dealloc(viodev, alloc_size);
@@ -585,12 +591,14 @@ static void vio_dma_iommu_unmap_sg(struct device *dev,
struct dma_attrs *attrs)
{
struct vio_dev *viodev = to_vio_dev(dev);
+ struct iommu_table *tbl;
struct scatterlist *sgl;
size_t alloc_size = 0;
int count = 0;
+ tbl = get_iommu_table_base(dev);
for (sgl = sglist; count < nelems; count++, sgl++)
- alloc_size += roundup(sgl->dma_length, IOMMU_PAGE_SIZE);
+ alloc_size += roundup(sgl->dma_length, IOMMU_PAGE_SIZE(tbl));
dma_iommu_ops.unmap_sg(dev, sglist, nelems, direction, attrs);
@@ -706,11 +714,14 @@ static int vio_cmo_bus_probe(struct vio_dev *viodev)
{
struct vio_cmo_dev_entry *dev_ent;
struct device *dev = &viodev->dev;
+ struct iommu_table *tbl;
struct vio_driver *viodrv = to_vio_driver(dev->driver);
unsigned long flags;
size_t size;
bool dma_capable = false;
+ tbl = get_iommu_table_base(dev);
+
/* A device requires entitlement if it has a DMA window property */
switch (viodev->family) {
case VDEVICE:
@@ -736,7 +747,8 @@ static int vio_cmo_bus_probe(struct vio_dev *viodev)
return -EINVAL;
}
- viodev->cmo.desired = IOMMU_PAGE_ALIGN(viodrv->get_desired_dma(viodev));
+ viodev->cmo.desired =
+ IOMMU_PAGE_ALIGN(viodrv->get_desired_dma(viodev), tbl);
if (viodev->cmo.desired < VIO_CMO_MIN_ENT)
viodev->cmo.desired = VIO_CMO_MIN_ENT;
size = VIO_CMO_MIN_ENT;
@@ -997,21 +1009,36 @@ static struct device_attribute vio_cmo_dev_attrs[] = {
/* sysfs bus functions and data structures for CMO */
#define viobus_cmo_rd_attr(name) \
-static ssize_t \
-viobus_cmo_##name##_show(struct bus_type *bt, char *buf) \
+static ssize_t cmo_##name##_show(struct bus_type *bt, char *buf) \
{ \
return sprintf(buf, "%lu\n", vio_cmo.name); \
-}
+} \
+static BUS_ATTR_RO(cmo_##name)
#define viobus_cmo_pool_rd_attr(name, var) \
static ssize_t \
-viobus_cmo_##name##_pool_show_##var(struct bus_type *bt, char *buf) \
+cmo_##name##_##var##_show(struct bus_type *bt, char *buf) \
{ \
return sprintf(buf, "%lu\n", vio_cmo.name.var); \
+} \
+static BUS_ATTR_RO(cmo_##name##_##var)
+
+viobus_cmo_rd_attr(entitled);
+viobus_cmo_rd_attr(spare);
+viobus_cmo_rd_attr(min);
+viobus_cmo_rd_attr(desired);
+viobus_cmo_rd_attr(curr);
+viobus_cmo_pool_rd_attr(reserve, size);
+viobus_cmo_pool_rd_attr(excess, size);
+viobus_cmo_pool_rd_attr(excess, free);
+
+static ssize_t cmo_high_show(struct bus_type *bt, char *buf)
+{
+ return sprintf(buf, "%lu\n", vio_cmo.high);
}
-static ssize_t viobus_cmo_high_reset(struct bus_type *bt, const char *buf,
- size_t count)
+static ssize_t cmo_high_store(struct bus_type *bt, const char *buf,
+ size_t count)
{
unsigned long flags;
@@ -1021,35 +1048,26 @@ static ssize_t viobus_cmo_high_reset(struct bus_type *bt, const char *buf,
return count;
}
-
-viobus_cmo_rd_attr(entitled);
-viobus_cmo_pool_rd_attr(reserve, size);
-viobus_cmo_pool_rd_attr(excess, size);
-viobus_cmo_pool_rd_attr(excess, free);
-viobus_cmo_rd_attr(spare);
-viobus_cmo_rd_attr(min);
-viobus_cmo_rd_attr(desired);
-viobus_cmo_rd_attr(curr);
-viobus_cmo_rd_attr(high);
-
-static struct bus_attribute vio_cmo_bus_attrs[] = {
- __ATTR(cmo_entitled, S_IRUGO, viobus_cmo_entitled_show, NULL),
- __ATTR(cmo_reserve_size, S_IRUGO, viobus_cmo_reserve_pool_show_size, NULL),
- __ATTR(cmo_excess_size, S_IRUGO, viobus_cmo_excess_pool_show_size, NULL),
- __ATTR(cmo_excess_free, S_IRUGO, viobus_cmo_excess_pool_show_free, NULL),
- __ATTR(cmo_spare, S_IRUGO, viobus_cmo_spare_show, NULL),
- __ATTR(cmo_min, S_IRUGO, viobus_cmo_min_show, NULL),
- __ATTR(cmo_desired, S_IRUGO, viobus_cmo_desired_show, NULL),
- __ATTR(cmo_curr, S_IRUGO, viobus_cmo_curr_show, NULL),
- __ATTR(cmo_high, S_IWUSR|S_IRUSR|S_IWGRP|S_IRGRP|S_IROTH,
- viobus_cmo_high_show, viobus_cmo_high_reset),
- __ATTR_NULL
+static BUS_ATTR_RW(cmo_high);
+
+static struct attribute *vio_bus_attrs[] = {
+ &bus_attr_cmo_entitled.attr,
+ &bus_attr_cmo_spare.attr,
+ &bus_attr_cmo_min.attr,
+ &bus_attr_cmo_desired.attr,
+ &bus_attr_cmo_curr.attr,
+ &bus_attr_cmo_high.attr,
+ &bus_attr_cmo_reserve_size.attr,
+ &bus_attr_cmo_excess_size.attr,
+ &bus_attr_cmo_excess_free.attr,
+ NULL,
};
+ATTRIBUTE_GROUPS(vio_bus);
static void vio_cmo_sysfs_init(void)
{
vio_bus_type.dev_attrs = vio_cmo_dev_attrs;
- vio_bus_type.bus_attrs = vio_cmo_bus_attrs;
+ vio_bus_type.bus_groups = vio_bus_groups;
}
#else /* CONFIG_PPC_SMLPAR */
int vio_cmo_entitlement_update(size_t new_entitlement) { return 0; }
@@ -1170,9 +1188,10 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
&tbl->it_index, &offset, &size);
/* TCE table size - measured in tce entries */
- tbl->it_size = size >> IOMMU_PAGE_SHIFT;
+ tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
+ tbl->it_size = size >> tbl->it_page_shift;
/* offset for VIO should always be 0 */
- tbl->it_offset = offset >> IOMMU_PAGE_SHIFT;
+ tbl->it_offset = offset >> tbl->it_page_shift;
tbl->it_busno = 0;
tbl->it_type = TCE_VB;
tbl->it_blocksize = 16;
@@ -1413,8 +1432,8 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
/* needed to ensure proper operation of coherent allocations
* later, in case driver doesn't set it explicitly */
- dma_set_mask(&viodev->dev, DMA_BIT_MASK(64));
- dma_set_coherent_mask(&viodev->dev, DMA_BIT_MASK(64));
+ viodev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
+ viodev->dev.dma_mask = &viodev->dev.coherent_dma_mask;
}
/* register with generic device framework */
@@ -1530,11 +1549,15 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
const char *cp;
dn = dev->of_node;
- if (!dn)
- return -ENODEV;
+ if (!dn) {
+ strcpy(buf, "\n");
+ return strlen(buf);
+ }
cp = of_get_property(dn, "compatible", NULL);
- if (!cp)
- return -ENODEV;
+ if (!cp) {
+ strcpy(buf, "\n");
+ return strlen(buf);
+ }
return sprintf(buf, "vio:T%sS%s\n", vio_dev->type, cp);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 23:48:35 +0000