arch/powerpc/platforms/pseries/iommu.c | 91 +++++++++++++-------------
1 file changed, 47 insertions(+), 44 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index a67e71c49aeb..52548dfb8b45 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -349,7 +349,7 @@ struct dynamic_dma_window_prop {
__be32 window_shift; /* ilog2(tce_window_size) */
};
-struct direct_window {
+struct dma_win {
struct device_node *device;
const struct dynamic_dma_window_prop *prop;
struct list_head list;
@@ -369,11 +369,11 @@ struct ddw_create_response {
u32 addr_lo;
};
-static LIST_HEAD(direct_window_list);
+static LIST_HEAD(dma_win_list);
/* prevents races between memory on/offline and window creation */
-static DEFINE_SPINLOCK(direct_window_list_lock);
+static DEFINE_SPINLOCK(dma_win_list_lock);
/* protects initializing window twice for same device */
-static DEFINE_MUTEX(direct_window_init_mutex);
+static DEFINE_MUTEX(dma_win_init_mutex);
#define DIRECT64_PROPNAME "linux,direct64-ddr-window-info"
#define DMA64_PROPNAME "linux,dma64-ddr-window-info"
@@ -713,7 +713,10 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus)
pr_debug("pci_dma_bus_setup_pSeriesLP: setting up bus %pOF\n",
dn);
- /* Find nearest ibm,dma-window, walking up the device tree */
+ /*
+ * Find nearest ibm,dma-window (default DMA window), walking up the
+ * device tree
+ */
for (pdn = dn; pdn != NULL; pdn = pdn->parent) {
dma_window = of_get_property(pdn, "ibm,dma-window", NULL);
if (dma_window != NULL)
@@ -822,11 +825,11 @@ static void remove_dma_window(struct device_node *np, u32
*ddw_avail,
ret = rtas_call(ddw_avail[DDW_REMOVE_PE_DMA_WIN], 1, 1, NULL, liobn);
if (ret)
- pr_warn("%pOF: failed to remove direct window: rtas returned "
+ pr_warn("%pOF: failed to remove DMA window: rtas returned "
"%d to ibm,remove-pe-dma-window(%x) %llx\n",
np, ret, ddw_avail[DDW_REMOVE_PE_DMA_WIN], liobn);
else
- pr_debug("%pOF: successfully removed direct window: rtas returned
"
+ pr_debug("%pOF: successfully removed DMA window: rtas returned "
"%d to ibm,remove-pe-dma-window(%x) %llx\n",
np, ret, ddw_avail[DDW_REMOVE_PE_DMA_WIN], liobn);
}
@@ -854,37 +857,37 @@ static int remove_ddw(struct device_node *np, bool
remove_prop, const char *win_
ret = of_remove_property(np, win);
if (ret)
- pr_warn("%pOF: failed to remove direct window property: %d\n",
+ pr_warn("%pOF: failed to remove DMA window property: %d\n",
np, ret);
return 0;
}
static bool find_existing_ddw(struct device_node *pdn, u64 *dma_addr, int *window_shift)
{
- struct direct_window *window;
- const struct dynamic_dma_window_prop *direct64;
+ struct dma_win *window;
+ const struct dynamic_dma_window_prop *dma64;
bool found = false;
- spin_lock(&direct_window_list_lock);
+ spin_lock(&dma_win_list_lock);
/* check if we already created a window and dupe that config if so */
- list_for_each_entry(window, &direct_window_list, list) {
+ list_for_each_entry(window, &dma_win_list, list) {
if (window->device == pdn) {
- direct64 = window->prop;
- *dma_addr = be64_to_cpu(direct64->dma_base);
- *window_shift = be32_to_cpu(direct64->window_shift);
+ dma64 = window->prop;
+ *dma_addr = be64_to_cpu(dma64->dma_base);
+ *window_shift = be32_to_cpu(dma64->window_shift);
found = true;
break;
}
}
- spin_unlock(&direct_window_list_lock);
+ spin_unlock(&dma_win_list_lock);
return found;
}
-static struct direct_window *ddw_list_new_entry(struct device_node *pdn,
- const struct
dynamic_dma_window_prop *dma64)
+static struct dma_win *ddw_list_new_entry(struct device_node *pdn,
+ const struct dynamic_dma_window_prop
*dma64)
{
- struct direct_window *window;
+ struct dma_win *window;
window = kzalloc(sizeof(*window), GFP_KERNEL);
if (!window)
@@ -900,7 +903,7 @@ static void find_existing_ddw_windows_named(const char
*name)
{
int len;
struct device_node *pdn;
- struct direct_window *window;
+ struct dma_win *window;
const struct dynamic_dma_window_prop *dma64;
for_each_node_with_property(pdn, name) {
@@ -914,9 +917,9 @@ static void find_existing_ddw_windows_named(const char
*name)
if (!window)
break;
- spin_lock(&direct_window_list_lock);
- list_add(&window->list, &direct_window_list);
- spin_unlock(&direct_window_list_lock);
+ spin_lock(&dma_win_list_lock);
+ list_add(&window->list, &dma_win_list);
+ spin_unlock(&dma_win_list_lock);
}
}
@@ -1216,7 +1219,7 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
const char *win_name;
struct device_node *dn;
u32 ddw_avail[DDW_APPLICABLE_SIZE];
- struct direct_window *window;
+ struct dma_win *window;
struct property *win64;
bool ddw_enabled = false;
struct failed_ddw_pdn *fpdn;
@@ -1229,7 +1232,7 @@ static bool enable_ddw(struct pci_dev *dev, struct
device_node *pdn)
pmem_present = dn != NULL;
of_node_put(dn);
- mutex_lock(&direct_window_init_mutex);
+ mutex_lock(&dma_win_init_mutex);
if (find_existing_ddw(pdn, &dev->dev.archdata.dma_offset, &len)) {
direct_mapping = (len >= max_ram_len);
@@ -1309,8 +1312,8 @@ static bool enable_ddw(struct pci_dev *dev, struct
device_node *pdn)
page_shift = iommu_get_page_shift(query.page_size);
if (!page_shift) {
- dev_dbg(&dev->dev, "no supported direct page size in mask %x",
- query.page_size);
+ dev_dbg(&dev->dev, "no supported page size in mask %x",
+ query.page_size);
goto out_failed;
}
@@ -1367,7 +1370,7 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
ret = of_add_property(pdn, win64);
if (ret) {
- dev_err(&dev->dev, "unable to add dma window property for %pOF:
%d",
+ dev_err(&dev->dev, "unable to add DMA window property for %pOF:
%d",
pdn, ret);
goto out_free_prop;
}
@@ -1381,7 +1384,7 @@ static bool enable_ddw(struct pci_dev *dev, struct
device_node *pdn)
ret = walk_system_ram_range(0, memblock_end_of_DRAM() >>
PAGE_SHIFT,
win64->value,
tce_setrange_multi_pSeriesLP_walk);
if (ret) {
- dev_info(&dev->dev, "failed to map direct window for %pOF:
%d\n",
+ dev_info(&dev->dev, "failed to map DMA window for %pOF:
%d\n",
dn, ret);
goto out_del_list;
}
@@ -1423,9 +1426,9 @@ static bool enable_ddw(struct pci_dev *dev, struct
device_node *pdn)
set_iommu_table_base(&dev->dev, newtbl);
}
- spin_lock(&direct_window_list_lock);
- list_add(&window->list, &direct_window_list);
- spin_unlock(&direct_window_list_lock);
+ spin_lock(&dma_win_list_lock);
+ list_add(&window->list, &dma_win_list);
+ spin_unlock(&dma_win_list_lock);
dev->dev.archdata.dma_offset = win_addr;
ddw_enabled = true;
@@ -1456,7 +1459,7 @@ static bool enable_ddw(struct pci_dev *dev, struct
device_node *pdn)
list_add(&fpdn->list, &failed_ddw_pdn_list);
out_unlock:
- mutex_unlock(&direct_window_init_mutex);
+ mutex_unlock(&dma_win_init_mutex);
/*
* If we have persistent memory and the window size is only as big
@@ -1554,29 +1557,29 @@ static bool iommu_bypass_supported_pSeriesLP(struct
pci_dev *pdev, u64 dma_mask)
static int iommu_mem_notifier(struct notifier_block *nb, unsigned long action,
void *data)
{
- struct direct_window *window;
+ struct dma_win *window;
struct memory_notify *arg = data;
int ret = 0;
switch (action) {
case MEM_GOING_ONLINE:
- spin_lock(&direct_window_list_lock);
- list_for_each_entry(window, &direct_window_list, list) {
+ spin_lock(&dma_win_list_lock);
+ list_for_each_entry(window, &dma_win_list, list) {
ret |= tce_setrange_multi_pSeriesLP(arg->start_pfn,
arg->nr_pages, window->prop);
/* XXX log error */
}
- spin_unlock(&direct_window_list_lock);
+ spin_unlock(&dma_win_list_lock);
break;
case MEM_CANCEL_ONLINE:
case MEM_OFFLINE:
- spin_lock(&direct_window_list_lock);
- list_for_each_entry(window, &direct_window_list, list) {
+ spin_lock(&dma_win_list_lock);
+ list_for_each_entry(window, &dma_win_list, list) {
ret |= tce_clearrange_multi_pSeriesLP(arg->start_pfn,
arg->nr_pages, window->prop);
/* XXX log error */
}
- spin_unlock(&direct_window_list_lock);
+ spin_unlock(&dma_win_list_lock);
break;
default:
break;
@@ -1597,7 +1600,7 @@ static int iommu_reconfig_notifier(struct notifier_block
*nb, unsigned long acti
struct of_reconfig_data *rd = data;
struct device_node *np = rd->dn;
struct pci_dn *pci = PCI_DN(np);
- struct direct_window *window;
+ struct dma_win *window;
switch (action) {
case OF_RECONFIG_DETACH_NODE:
@@ -1615,15 +1618,15 @@ static int iommu_reconfig_notifier(struct
notifier_block *nb, unsigned long acti
iommu_pseries_free_group(pci->table_group,
np->full_name);
- spin_lock(&direct_window_list_lock);
- list_for_each_entry(window, &direct_window_list, list) {
+ spin_lock(&dma_win_list_lock);
+ list_for_each_entry(window, &dma_win_list, list) {
if (window->device == np) {
list_del(&window->list);
kfree(window);
break;
}
}
- spin_unlock(&direct_window_list_lock);
+ spin_unlock(&dma_win_list_lock);
break;
default:
err = NOTIFY_DONE;
