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openwrt/target/linux/layerscape/patches-4.14/202-core-linux-support-laye...

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From d2ef9f2f6d16d34d7eee74cb8efd269341fec5a1 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Mon, 6 May 2019 16:54:17 +0800
Subject: [PATCH] core-linux: support layerscape
This is an integrated patch of core-linux for layerscape
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Abhijit Ayarekar <abhijit.ayarekar@caviumnetworks.com>
Signed-off-by: Amrita Kumari <amrita.kumari@nxp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Guanhua Gao <guanhua.gao@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Signed-off-by: pascal paillet <p.paillet@st.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Suresh Gupta <suresh.gupta@freescale.com>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
drivers/base/core.c | 122 ++++++++++++++++++++++++++----
drivers/base/dma-mapping.c | 7 ++
drivers/gpu/ipu-v3/ipu-pre.c | 3 +-
drivers/gpu/ipu-v3/ipu-prg.c | 3 +-
drivers/iommu/dma-iommu.c | 3 +
drivers/mux/Kconfig | 12 +--
drivers/mux/mmio.c | 6 +-
drivers/of/device.c | 14 +++-
drivers/soc/imx/gpc.c | 2 +-
include/linux/device.h | 20 +++--
include/linux/fsl_devices.h | 2 +
include/linux/netdevice.h | 10 ++-
include/linux/skbuff.h | 2 +
lib/dma-noop.c | 19 +++++
mm/page_alloc.c | 10 ++-
net/core/dev.c | 81 ++++++++++++--------
net/core/skbuff.c | 29 ++++++-
samples/bpf/Makefile | 12 ++-
samples/bpf/map_perf_test_kern.c | 2 +-
samples/bpf/map_perf_test_user.c | 2 +-
tools/testing/selftests/bpf/bpf_helpers.h | 56 ++++++++++++--
21 files changed, 337 insertions(+), 80 deletions(-)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -162,10 +162,10 @@ static int device_reorder_to_tail(struct
* of the link. If DL_FLAG_PM_RUNTIME is not set, DL_FLAG_RPM_ACTIVE will be
* ignored.
*
- * If the DL_FLAG_AUTOREMOVE is set, the link will be removed automatically
- * when the consumer device driver unbinds from it. The combination of both
- * DL_FLAG_AUTOREMOVE and DL_FLAG_STATELESS set is invalid and will cause NULL
- * to be returned.
+ * If the DL_FLAG_AUTOREMOVE_CONSUMER is set, the link will be removed
+ * automatically when the consumer device driver unbinds from it.
+ * The combination of both DL_FLAG_AUTOREMOVE_CONSUMER and DL_FLAG_STATELESS
+ * set is invalid and will cause NULL to be returned.
*
* A side effect of the link creation is re-ordering of dpm_list and the
* devices_kset list by moving the consumer device and all devices depending
@@ -182,7 +182,8 @@ struct device_link *device_link_add(stru
struct device_link *link;
if (!consumer || !supplier ||
- ((flags & DL_FLAG_STATELESS) && (flags & DL_FLAG_AUTOREMOVE)))
+ ((flags & DL_FLAG_STATELESS) &&
+ (flags & DL_FLAG_AUTOREMOVE_CONSUMER)))
return NULL;
device_links_write_lock();
@@ -200,8 +201,10 @@ struct device_link *device_link_add(stru
}
list_for_each_entry(link, &supplier->links.consumers, s_node)
- if (link->consumer == consumer)
+ if (link->consumer == consumer) {
+ kref_get(&link->kref);
goto out;
+ }
link = kzalloc(sizeof(*link), GFP_KERNEL);
if (!link)
@@ -233,6 +236,7 @@ struct device_link *device_link_add(stru
link->consumer = consumer;
INIT_LIST_HEAD(&link->c_node);
link->flags = flags;
+ kref_init(&link->kref);
/* Determine the initial link state. */
if (flags & DL_FLAG_STATELESS) {
@@ -303,8 +307,10 @@ static void __device_link_free_srcu(stru
device_link_free(container_of(rhead, struct device_link, rcu_head));
}
-static void __device_link_del(struct device_link *link)
+static void __device_link_del(struct kref *kref)
{
+ struct device_link *link = container_of(kref, struct device_link, kref);
+
dev_info(link->consumer, "Dropping the link to %s\n",
dev_name(link->supplier));
@@ -316,8 +322,10 @@ static void __device_link_del(struct dev
call_srcu(&device_links_srcu, &link->rcu_head, __device_link_free_srcu);
}
#else /* !CONFIG_SRCU */
-static void __device_link_del(struct device_link *link)
+static void __device_link_del(struct kref *kref)
{
+ struct device_link *link = container_of(kref, struct device_link, kref);
+
dev_info(link->consumer, "Dropping the link to %s\n",
dev_name(link->supplier));
@@ -335,18 +343,50 @@ static void __device_link_del(struct dev
* @link: Device link to delete.
*
* The caller must ensure proper synchronization of this function with runtime
- * PM.
+ * PM. If the link was added multiple times, it needs to be deleted as often.
+ * Care is required for hotplugged devices: Their links are purged on removal
+ * and calling device_link_del() is then no longer allowed.
*/
void device_link_del(struct device_link *link)
{
device_links_write_lock();
device_pm_lock();
- __device_link_del(link);
+ kref_put(&link->kref, __device_link_del);
device_pm_unlock();
device_links_write_unlock();
}
EXPORT_SYMBOL_GPL(device_link_del);
+/**
+ * device_link_remove - remove a link between two devices.
+ * @consumer: Consumer end of the link.
+ * @supplier: Supplier end of the link.
+ *
+ * The caller must ensure proper synchronization of this function with runtime
+ * PM.
+ */
+void device_link_remove(void *consumer, struct device *supplier)
+{
+ struct device_link *link;
+
+ if (WARN_ON(consumer == supplier))
+ return;
+
+ device_links_write_lock();
+ device_pm_lock();
+
+ list_for_each_entry(link, &supplier->links.consumers, s_node) {
+ if (link->consumer == consumer) {
+ kref_put(&link->kref, __device_link_del);
+ break;
+ }
+ }
+
+ device_pm_unlock();
+ device_links_write_unlock();
+}
+EXPORT_SYMBOL_GPL(device_link_remove);
+
static void device_links_missing_supplier(struct device *dev)
{
struct device_link *link;
@@ -454,8 +494,8 @@ static void __device_links_no_driver(str
if (link->flags & DL_FLAG_STATELESS)
continue;
- if (link->flags & DL_FLAG_AUTOREMOVE)
- __device_link_del(link);
+ if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER)
+ kref_put(&link->kref, __device_link_del);
else if (link->status != DL_STATE_SUPPLIER_UNBIND)
WRITE_ONCE(link->status, DL_STATE_AVAILABLE);
}
@@ -490,8 +530,18 @@ void device_links_driver_cleanup(struct
if (link->flags & DL_FLAG_STATELESS)
continue;
- WARN_ON(link->flags & DL_FLAG_AUTOREMOVE);
+ WARN_ON(link->flags & DL_FLAG_AUTOREMOVE_CONSUMER);
WARN_ON(link->status != DL_STATE_SUPPLIER_UNBIND);
+
+ /*
+ * autoremove the links between this @dev and its consumer
+ * devices that are not active, i.e. where the link state
+ * has moved to DL_STATE_SUPPLIER_UNBIND.
+ */
+ if (link->status == DL_STATE_SUPPLIER_UNBIND &&
+ link->flags & DL_FLAG_AUTOREMOVE_SUPPLIER)
+ kref_put(&link->kref, __device_link_del);
+
WRITE_ONCE(link->status, DL_STATE_DORMANT);
}
@@ -608,13 +658,13 @@ static void device_links_purge(struct de
list_for_each_entry_safe_reverse(link, ln, &dev->links.suppliers, c_node) {
WARN_ON(link->status == DL_STATE_ACTIVE);
- __device_link_del(link);
+ __device_link_del(&link->kref);
}
list_for_each_entry_safe_reverse(link, ln, &dev->links.consumers, s_node) {
WARN_ON(link->status != DL_STATE_DORMANT &&
link->status != DL_STATE_NONE);
- __device_link_del(link);
+ __device_link_del(&link->kref);
}
device_links_write_unlock();
@@ -1036,6 +1086,34 @@ static ssize_t online_store(struct devic
}
static DEVICE_ATTR_RW(online);
+static ssize_t suppliers_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct device_link *link;
+ size_t count = 0;
+
+ list_for_each_entry(link, &dev->links.suppliers, c_node)
+ count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
+ dev_name(link->supplier));
+
+ return count;
+}
+static DEVICE_ATTR_RO(suppliers);
+
+static ssize_t consumers_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct device_link *link;
+ size_t count = 0;
+
+ list_for_each_entry(link, &dev->links.consumers, s_node)
+ count += scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
+ dev_name(link->consumer));
+
+ return count;
+}
+static DEVICE_ATTR_RO(consumers);
+
int device_add_groups(struct device *dev, const struct attribute_group **groups)
{
return sysfs_create_groups(&dev->kobj, groups);
@@ -1207,8 +1285,20 @@ static int device_add_attrs(struct devic
goto err_remove_dev_groups;
}
+ error = device_create_file(dev, &dev_attr_suppliers);
+ if (error)
+ goto err_remove_online;
+
+ error = device_create_file(dev, &dev_attr_consumers);
+ if (error)
+ goto err_remove_suppliers;
+
return 0;
+ err_remove_suppliers:
+ device_remove_file(dev, &dev_attr_suppliers);
+ err_remove_online:
+ device_remove_file(dev, &dev_attr_online);
err_remove_dev_groups:
device_remove_groups(dev, dev->groups);
err_remove_type_groups:
@@ -1226,6 +1316,8 @@ static void device_remove_attrs(struct d
struct class *class = dev->class;
const struct device_type *type = dev->type;
+ device_remove_file(dev, &dev_attr_consumers);
+ device_remove_file(dev, &dev_attr_suppliers);
device_remove_file(dev, &dev_attr_online);
device_remove_groups(dev, dev->groups);
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -335,6 +335,7 @@ void dma_common_free_remap(void *cpu_add
* Common configuration to enable DMA API use for a device
*/
#include <linux/pci.h>
+#include <linux/fsl/mc.h>
int dma_configure(struct device *dev)
{
@@ -350,6 +351,12 @@ int dma_configure(struct device *dev)
dma_dev = dma_dev->parent;
}
+ if (dev_is_fsl_mc(dev)) {
+ dma_dev = dev;
+ while (dev_is_fsl_mc(dma_dev))
+ dma_dev = dma_dev->parent;
+ }
+
if (dma_dev->of_node) {
ret = of_dma_configure(dev, dma_dev->of_node);
} else if (has_acpi_companion(dma_dev)) {
--- a/drivers/gpu/ipu-v3/ipu-pre.c
+++ b/drivers/gpu/ipu-v3/ipu-pre.c
@@ -124,7 +124,8 @@ ipu_pre_lookup_by_phandle(struct device
list_for_each_entry(pre, &ipu_pre_list, list) {
if (pre_node == pre->dev->of_node) {
mutex_unlock(&ipu_pre_list_mutex);
- device_link_add(dev, pre->dev, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, pre->dev,
+ DL_FLAG_AUTOREMOVE_CONSUMER);
of_node_put(pre_node);
return pre;
}
--- a/drivers/gpu/ipu-v3/ipu-prg.c
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -99,7 +99,8 @@ ipu_prg_lookup_by_phandle(struct device
list_for_each_entry(prg, &ipu_prg_list, list) {
if (prg_node == prg->dev->of_node) {
mutex_unlock(&ipu_prg_list_mutex);
- device_link_add(dev, prg->dev, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, prg->dev,
+ DL_FLAG_AUTOREMOVE_CONSUMER);
prg->id = ipu_id;
of_node_put(prg_node);
return prg;
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -381,6 +381,9 @@ static dma_addr_t iommu_dma_alloc_iova(s
if (iova_len < (1 << (IOVA_RANGE_CACHE_MAX_SIZE - 1)))
iova_len = roundup_pow_of_two(iova_len);
+ if (dev->bus_dma_mask)
+ dma_limit &= dev->bus_dma_mask;
+
if (domain->geometry.force_aperture)
dma_limit = min(dma_limit, domain->geometry.aperture_end);
--- a/drivers/mux/Kconfig
+++ b/drivers/mux/Kconfig
@@ -35,14 +35,14 @@ config MUX_GPIO
be called mux-gpio.
config MUX_MMIO
- tristate "MMIO register bitfield-controlled Multiplexer"
- depends on (OF && MFD_SYSCON) || COMPILE_TEST
+ tristate "MMIO/Regmap register bitfield-controlled Multiplexer"
+ depends on OF || COMPILE_TEST
help
- MMIO register bitfield-controlled Multiplexer controller.
+ MMIO/Regmap register bitfield-controlled Multiplexer controller.
- The driver builds multiplexer controllers for bitfields in a syscon
- register. For N bit wide bitfields, there will be 2^N possible
- multiplexer states.
+ The driver builds multiplexer controllers for bitfields in either
+ a syscon register or a driver regmap register. For N bit wide
+ bitfields, there will be 2^N possible multiplexer states.
To compile the driver as a module, choose M here: the module will
be called mux-mmio.
--- a/drivers/mux/mmio.c
+++ b/drivers/mux/mmio.c
@@ -31,6 +31,7 @@ static const struct mux_control_ops mux_
static const struct of_device_id mux_mmio_dt_ids[] = {
{ .compatible = "mmio-mux", },
+ { .compatible = "reg-mux", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mux_mmio_dt_ids);
@@ -46,7 +47,10 @@ static int mux_mmio_probe(struct platfor
int ret;
int i;
- regmap = syscon_node_to_regmap(np->parent);
+ if (of_device_is_compatible(np, "mmio-mux"))
+ regmap = syscon_node_to_regmap(np->parent);
+ else
+ regmap = dev_get_regmap(dev->parent, NULL) ?: ERR_PTR(-ENODEV);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(dev, "failed to get regmap: %d\n", ret);
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -15,6 +15,9 @@
#include <asm/errno.h>
#include "of_private.h"
+#ifdef CONFIG_FSL_MC_BUS
+#include <linux/fsl/mc.h>
+#endif
/**
* of_match_device - Tell if a struct device matches an of_device_id list
@@ -105,6 +108,9 @@ int of_dma_configure(struct device *dev,
#ifdef CONFIG_ARM_AMBA
dev->bus != &amba_bustype &&
#endif
+#ifdef CONFIG_FSL_MC_BUS
+ dev->bus != &fsl_mc_bus_type &&
+#endif
dev->bus != &platform_bus_type)
return ret == -ENODEV ? 0 : ret;
@@ -152,10 +158,16 @@ int of_dma_configure(struct device *dev,
* set by the driver.
*/
mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
+ dev->bus_dma_mask = mask;
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
- coherent = of_dma_is_coherent(np);
+#ifdef CONFIG_FSL_MC_BUS
+ if (dev_is_fsl_mc(dev))
+ coherent = fsl_mc_is_dev_coherent(dev);
+ else
+#endif
+ coherent = of_dma_is_coherent(np);
dev_dbg(dev, "device is%sdma coherent\n",
coherent ? " " : " not ");
--- a/drivers/soc/imx/gpc.c
+++ b/drivers/soc/imx/gpc.c
@@ -209,7 +209,7 @@ static int imx_pgc_power_domain_probe(st
goto genpd_err;
}
- device_link_add(dev, dev->parent, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, dev->parent, DL_FLAG_AUTOREMOVE_CONSUMER);
return 0;
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -55,6 +55,8 @@ struct bus_attribute {
struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
#define BUS_ATTR_RO(_name) \
struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
+#define BUS_ATTR_WO(_name) \
+ struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
extern int __must_check bus_create_file(struct bus_type *,
struct bus_attribute *);
@@ -750,14 +752,16 @@ enum device_link_state {
* Device link flags.
*
* STATELESS: The core won't track the presence of supplier/consumer drivers.
- * AUTOREMOVE: Remove this link automatically on consumer driver unbind.
+ * AUTOREMOVE_CONSUMER: Remove the link automatically on consumer driver unbind.
* PM_RUNTIME: If set, the runtime PM framework will use this link.
* RPM_ACTIVE: Run pm_runtime_get_sync() on the supplier during link creation.
+ * AUTOREMOVE_SUPPLIER: Remove the link automatically on supplier driver unbind.
*/
-#define DL_FLAG_STATELESS BIT(0)
-#define DL_FLAG_AUTOREMOVE BIT(1)
-#define DL_FLAG_PM_RUNTIME BIT(2)
-#define DL_FLAG_RPM_ACTIVE BIT(3)
+#define DL_FLAG_STATELESS BIT(0)
+#define DL_FLAG_AUTOREMOVE_CONSUMER BIT(1)
+#define DL_FLAG_PM_RUNTIME BIT(2)
+#define DL_FLAG_RPM_ACTIVE BIT(3)
+#define DL_FLAG_AUTOREMOVE_SUPPLIER BIT(4)
/**
* struct device_link - Device link representation.
@@ -768,6 +772,7 @@ enum device_link_state {
* @status: The state of the link (with respect to the presence of drivers).
* @flags: Link flags.
* @rpm_active: Whether or not the consumer device is runtime-PM-active.
+ * @kref: Count repeated addition of the same link.
* @rcu_head: An RCU head to use for deferred execution of SRCU callbacks.
*/
struct device_link {
@@ -778,6 +783,7 @@ struct device_link {
enum device_link_state status;
u32 flags;
bool rpm_active;
+ struct kref kref;
#ifdef CONFIG_SRCU
struct rcu_head rcu_head;
#endif
@@ -850,6 +856,8 @@ struct dev_links_info {
* @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all
* hardware supports 64-bit addresses for consistent allocations
* such descriptors.
+ * @bus_dma_mask: Mask of an upstream bridge or bus which imposes a smaller DMA
+ * limit than the device itself supports.
* @dma_pfn_offset: offset of DMA memory range relatively of RAM
* @dma_parms: A low level driver may set these to teach IOMMU code about
* segment limitations.
@@ -929,6 +937,7 @@ struct device {
not all hardware supports
64 bit addresses for consistent
allocations such descriptors. */
+ u64 bus_dma_mask; /* upstream dma_mask constraint */
unsigned long dma_pfn_offset;
struct device_dma_parameters *dma_parms;
@@ -1267,6 +1276,7 @@ extern const char *dev_driver_string(con
struct device_link *device_link_add(struct device *consumer,
struct device *supplier, u32 flags);
void device_link_del(struct device_link *link);
+void device_link_remove(void *consumer, struct device *supplier);
#ifdef CONFIG_PRINTK
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -99,7 +99,9 @@ struct fsl_usb2_platform_data {
unsigned suspended:1;
unsigned already_suspended:1;
unsigned has_fsl_erratum_a007792:1;
+ unsigned has_fsl_erratum_14:1;
unsigned has_fsl_erratum_a005275:1;
+ unsigned has_fsl_erratum_a006918:1;
unsigned has_fsl_erratum_a005697:1;
unsigned check_phy_clk_valid:1;
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2344,7 +2344,8 @@ int register_netdevice_notifier(struct n
int unregister_netdevice_notifier(struct notifier_block *nb);
struct netdev_notifier_info {
- struct net_device *dev;
+ struct net_device *dev;
+ struct netlink_ext_ack *extack;
};
struct netdev_notifier_info_ext {
@@ -2376,6 +2377,7 @@ static inline void netdev_notifier_info_
struct net_device *dev)
{
info->dev = dev;
+ info->extack = NULL;
}
static inline struct net_device *
@@ -2384,6 +2386,12 @@ netdev_notifier_info_to_dev(const struct
return info->dev;
}
+static inline struct netlink_ext_ack *
+netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
+{
+ return info->extack;
+}
+
int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -964,6 +964,7 @@ void kfree_skb_list(struct sk_buff *segs
void skb_tx_error(struct sk_buff *skb);
void consume_skb(struct sk_buff *skb);
void __consume_stateless_skb(struct sk_buff *skb);
+void skb_recycle(struct sk_buff *skb);
void __kfree_skb(struct sk_buff *skb);
extern struct kmem_cache *skbuff_head_cache;
@@ -3313,6 +3314,7 @@ static inline void skb_free_datagram_loc
}
int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags);
int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len);
+void copy_skb_header(struct sk_buff *new, const struct sk_buff *old);
int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len);
__wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset, u8 *to,
int len, __wsum csum);
--- a/lib/dma-noop.c
+++ b/lib/dma-noop.c
@@ -58,11 +58,30 @@ static int dma_noop_map_sg(struct device
return nents;
}
+static int dma_noop_supported(struct device *dev, u64 mask)
+{
+#ifdef CONFIG_ZONE_DMA
+ if (mask < DMA_BIT_MASK(ARCH_ZONE_DMA_BITS))
+ return 0;
+#else
+ /*
+ * Because 32-bit DMA masks are so common we expect every architecture
+ * to be able to satisfy them - either by not supporting more physical
+ * memory, or by providing a ZONE_DMA32. If neither is the case, the
+ * architecture needs to use an IOMMU instead of the direct mapping.
+ */
+ if (dev->bus_dma_mask && mask > dev->bus_dma_mask)
+ return 0;
+#endif
+ return 1;
+}
+
const struct dma_map_ops dma_noop_ops = {
.alloc = dma_noop_alloc,
.free = dma_noop_free,
.map_page = dma_noop_map_page,
.map_sg = dma_noop_map_sg,
+ dma_supported = dma_noop_supported
};
EXPORT_SYMBOL(dma_noop_ops);
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4366,8 +4366,14 @@ void page_frag_free(void *addr)
{
struct page *page = virt_to_head_page(addr);
- if (unlikely(put_page_testzero(page)))
- __free_pages_ok(page, compound_order(page));
+ if (unlikely(put_page_testzero(page))) {
+ unsigned int order = compound_order(page);
+
+ if (order == 0) /* Via pcp? */
+ free_hot_cold_page(page, false);
+ else
+ __free_pages_ok(page, order);
+ }
}
EXPORT_SYMBOL(page_frag_free);
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -162,7 +162,6 @@ static struct list_head offload_base __r
static int netif_rx_internal(struct sk_buff *skb);
static int call_netdevice_notifiers_info(unsigned long val,
- struct net_device *dev,
struct netdev_notifier_info *info);
static struct napi_struct *napi_by_id(unsigned int napi_id);
@@ -1312,10 +1311,11 @@ EXPORT_SYMBOL(netdev_features_change);
void netdev_state_change(struct net_device *dev)
{
if (dev->flags & IFF_UP) {
- struct netdev_notifier_change_info change_info;
+ struct netdev_notifier_change_info change_info = {
+ .info.dev = dev,
+ };
- change_info.flags_changed = 0;
- call_netdevice_notifiers_info(NETDEV_CHANGE, dev,
+ call_netdevice_notifiers_info(NETDEV_CHANGE,
&change_info.info);
rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
}
@@ -1536,9 +1536,10 @@ EXPORT_SYMBOL(dev_disable_lro);
static int call_netdevice_notifier(struct notifier_block *nb, unsigned long val,
struct net_device *dev)
{
- struct netdev_notifier_info info;
+ struct netdev_notifier_info info = {
+ .dev = dev,
+ };
- netdev_notifier_info_init(&info, dev);
return nb->notifier_call(nb, val, &info);
}
@@ -1663,11 +1664,9 @@ EXPORT_SYMBOL(unregister_netdevice_notif
*/
static int call_netdevice_notifiers_info(unsigned long val,
- struct net_device *dev,
struct netdev_notifier_info *info)
{
ASSERT_RTNL();
- netdev_notifier_info_init(info, dev);
return raw_notifier_call_chain(&netdev_chain, val, info);
}
@@ -1682,9 +1681,11 @@ static int call_netdevice_notifiers_info
int call_netdevice_notifiers(unsigned long val, struct net_device *dev)
{
- struct netdev_notifier_info info;
+ struct netdev_notifier_info info = {
+ .dev = dev,
+ };
- return call_netdevice_notifiers_info(val, dev, &info);
+ return call_netdevice_notifiers_info(val, &info);
}
EXPORT_SYMBOL(call_netdevice_notifiers);
@@ -1707,7 +1708,7 @@ static int call_netdevice_notifiers_mtu(
BUILD_BUG_ON(offsetof(struct netdev_notifier_info_ext, info) != 0);
- return call_netdevice_notifiers_info(val, dev, &info.info);
+ return call_netdevice_notifiers_info(val, &info.info);
}
#ifdef CONFIG_NET_INGRESS
@@ -6341,7 +6342,15 @@ static int __netdev_upper_dev_link(struc
struct net_device *upper_dev, bool master,
void *upper_priv, void *upper_info)
{
- struct netdev_notifier_changeupper_info changeupper_info;
+ struct netdev_notifier_changeupper_info changeupper_info = {
+ .info = {
+ .dev = dev,
+ },
+ .upper_dev = upper_dev,
+ .master = master,
+ .linking = true,
+ .upper_info = upper_info,
+ };
int ret = 0;
ASSERT_RTNL();
@@ -6359,12 +6368,7 @@ static int __netdev_upper_dev_link(struc
if (master && netdev_master_upper_dev_get(dev))
return -EBUSY;
- changeupper_info.upper_dev = upper_dev;
- changeupper_info.master = master;
- changeupper_info.linking = true;
- changeupper_info.upper_info = upper_info;
-
- ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER, dev,
+ ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER,
&changeupper_info.info);
ret = notifier_to_errno(ret);
if (ret)
@@ -6376,7 +6380,7 @@ static int __netdev_upper_dev_link(struc
return ret;
netdev_update_addr_mask(dev);
- ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
+ ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
&changeupper_info.info);
ret = notifier_to_errno(ret);
if (ret)
@@ -6440,21 +6444,25 @@ EXPORT_SYMBOL(netdev_master_upper_dev_li
void netdev_upper_dev_unlink(struct net_device *dev,
struct net_device *upper_dev)
{
- struct netdev_notifier_changeupper_info changeupper_info;
+ struct netdev_notifier_changeupper_info changeupper_info = {
+ .info = {
+ .dev = dev,
+ },
+ .upper_dev = upper_dev,
+ .linking = false,
+ };
ASSERT_RTNL();
- changeupper_info.upper_dev = upper_dev;
changeupper_info.master = netdev_master_upper_dev_get(dev) == upper_dev;
- changeupper_info.linking = false;
- call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER, dev,
+ call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER,
&changeupper_info.info);
__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
netdev_update_addr_mask(dev);
- call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
+ call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
&changeupper_info.info);
}
EXPORT_SYMBOL(netdev_upper_dev_unlink);
@@ -6470,11 +6478,13 @@ EXPORT_SYMBOL(netdev_upper_dev_unlink);
void netdev_bonding_info_change(struct net_device *dev,
struct netdev_bonding_info *bonding_info)
{
- struct netdev_notifier_bonding_info info;
+ struct netdev_notifier_bonding_info info = {
+ .info.dev = dev,
+ };
memcpy(&info.bonding_info, bonding_info,
sizeof(struct netdev_bonding_info));
- call_netdevice_notifiers_info(NETDEV_BONDING_INFO, dev,
+ call_netdevice_notifiers_info(NETDEV_BONDING_INFO,
&info.info);
}
EXPORT_SYMBOL(netdev_bonding_info_change);
@@ -6600,11 +6610,13 @@ EXPORT_SYMBOL(dev_get_nest_level);
void netdev_lower_state_changed(struct net_device *lower_dev,
void *lower_state_info)
{
- struct netdev_notifier_changelowerstate_info changelowerstate_info;
+ struct netdev_notifier_changelowerstate_info changelowerstate_info = {
+ .info.dev = lower_dev,
+ };
ASSERT_RTNL();
changelowerstate_info.lower_state_info = lower_state_info;
- call_netdevice_notifiers_info(NETDEV_CHANGELOWERSTATE, lower_dev,
+ call_netdevice_notifiers_info(NETDEV_CHANGELOWERSTATE,
&changelowerstate_info.info);
}
EXPORT_SYMBOL(netdev_lower_state_changed);
@@ -6895,11 +6907,14 @@ void __dev_notify_flags(struct net_devic
if (dev->flags & IFF_UP &&
(changes & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | IFF_VOLATILE))) {
- struct netdev_notifier_change_info change_info;
+ struct netdev_notifier_change_info change_info = {
+ .info = {
+ .dev = dev,
+ },
+ .flags_changed = changes,
+ };
- change_info.flags_changed = changes;
- call_netdevice_notifiers_info(NETDEV_CHANGE, dev,
- &change_info.info);
+ call_netdevice_notifiers_info(NETDEV_CHANGE, &change_info.info);
}
}
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -803,6 +803,32 @@ void napi_consume_skb(struct sk_buff *sk
}
EXPORT_SYMBOL(napi_consume_skb);
+/**
+ * skb_recycle - clean up an skb for reuse
+ * @skb: buffer
+ *
+ * Recycles the skb to be reused as a receive buffer. This
+ * function does any necessary reference count dropping, and
+ * cleans up the skbuff as if it just came from __alloc_skb().
+ */
+void skb_recycle(struct sk_buff *skb)
+{
+ struct skb_shared_info *shinfo;
+ u8 head_frag = skb->head_frag;
+
+ skb_release_head_state(skb);
+
+ shinfo = skb_shinfo(skb);
+ memset(shinfo, 0, offsetof(struct skb_shared_info, dataref));
+ atomic_set(&shinfo->dataref, 1);
+
+ memset(skb, 0, offsetof(struct sk_buff, tail));
+ skb->data = skb->head + NET_SKB_PAD;
+ skb->head_frag = head_frag;
+ skb_reset_tail_pointer(skb);
+}
+EXPORT_SYMBOL(skb_recycle);
+
/* Make sure a field is enclosed inside headers_start/headers_end section */
#define CHECK_SKB_FIELD(field) \
BUILD_BUG_ON(offsetof(struct sk_buff, field) < \
@@ -1322,7 +1348,7 @@ static void skb_headers_offset_update(st
skb->inner_mac_header += off;
}
-static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
+void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
{
__copy_skb_header(new, old);
@@ -1330,6 +1356,7 @@ static void copy_skb_header(struct sk_bu
skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs;
skb_shinfo(new)->gso_type = skb_shinfo(old)->gso_type;
}
+EXPORT_SYMBOL(copy_skb_header);
static inline int skb_alloc_rx_flag(const struct sk_buff *skb)
{
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -178,6 +178,12 @@ HOSTLOADLIBES_syscall_tp += -lelf
LLC ?= llc
CLANG ?= clang
+# Detect that we're cross compiling and use the cross compiler
+ifdef CROSS_COMPILE
+HOSTCC = $(CROSS_COMPILE)gcc
+CLANG_ARCH_ARGS = -target $(ARCH)
+endif
+
# Trick to allow make to be run from this directory
all: $(LIBBPF)
$(MAKE) -C ../../ $(CURDIR)/
@@ -228,9 +234,9 @@ $(obj)/tracex5_kern.o: $(obj)/syscall_nr
$(obj)/%.o: $(src)/%.c
$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
-I$(srctree)/tools/testing/selftests/bpf/ \
- -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
- -Wno-compare-distinct-pointer-types \
+ -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
+ -D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
- -Wno-unknown-warning-option \
+ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
--- a/samples/bpf/map_perf_test_kern.c
+++ b/samples/bpf/map_perf_test_kern.c
@@ -266,7 +266,7 @@ int stress_hash_map_lookup(struct pt_reg
return 0;
}
-SEC("kprobe/sys_getpgrp")
+SEC("kprobe/sys_getppid")
int stress_array_map_lookup(struct pt_regs *ctx)
{
u32 key = 1, i;
--- a/samples/bpf/map_perf_test_user.c
+++ b/samples/bpf/map_perf_test_user.c
@@ -282,7 +282,7 @@ static void test_array_lookup(int cpu)
start_time = time_get_ns();
for (i = 0; i < max_cnt; i++)
- syscall(__NR_getpgrp, 0);
+ syscall(__NR_getppid, 0);
printf("%d:array_lookup %lld lookups per sec\n",
cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
}
--- a/tools/testing/selftests/bpf/bpf_helpers.h
+++ b/tools/testing/selftests/bpf/bpf_helpers.h
@@ -110,7 +110,47 @@ static int (*bpf_skb_under_cgroup)(void
static int (*bpf_skb_change_head)(void *, int len, int flags) =
(void *) BPF_FUNC_skb_change_head;
+/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
+#if defined(__TARGET_ARCH_x86)
+ #define bpf_target_x86
+ #define bpf_target_defined
+#elif defined(__TARGET_ARCH_s930x)
+ #define bpf_target_s930x
+ #define bpf_target_defined
+#elif defined(__TARGET_ARCH_arm64)
+ #define bpf_target_arm64
+ #define bpf_target_defined
+#elif defined(__TARGET_ARCH_mips)
+ #define bpf_target_mips
+ #define bpf_target_defined
+#elif defined(__TARGET_ARCH_powerpc)
+ #define bpf_target_powerpc
+ #define bpf_target_defined
+#elif defined(__TARGET_ARCH_sparc)
+ #define bpf_target_sparc
+ #define bpf_target_defined
+#else
+ #undef bpf_target_defined
+#endif
+
+/* Fall back to what the compiler says */
+#ifndef bpf_target_defined
#if defined(__x86_64__)
+ #define bpf_target_x86
+#elif defined(__s390x__)
+ #define bpf_target_s930x
+#elif defined(__aarch64__)
+ #define bpf_target_arm64
+#elif defined(__mips__)
+ #define bpf_target_mips
+#elif defined(__powerpc__)
+ #define bpf_target_powerpc
+#elif defined(__sparc__)
+ #define bpf_target_sparc
+#endif
+#endif
+
+#if defined(bpf_target_x86)
#define PT_REGS_PARM1(x) ((x)->di)
#define PT_REGS_PARM2(x) ((x)->si)
@@ -123,7 +163,7 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->ip)
-#elif defined(__s390x__)
+#elif defined(bpf_target_s390x)
#define PT_REGS_PARM1(x) ((x)->gprs[2])
#define PT_REGS_PARM2(x) ((x)->gprs[3])
@@ -136,7 +176,7 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_SP(x) ((x)->gprs[15])
#define PT_REGS_IP(x) ((x)->psw.addr)
-#elif defined(__aarch64__)
+#elif defined(bpf_target_arm64)
#define PT_REGS_PARM1(x) ((x)->regs[0])
#define PT_REGS_PARM2(x) ((x)->regs[1])
@@ -149,7 +189,7 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->pc)
-#elif defined(__mips__)
+#elif defined(bpf_target_mips)
#define PT_REGS_PARM1(x) ((x)->regs[4])
#define PT_REGS_PARM2(x) ((x)->regs[5])
@@ -162,7 +202,7 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_SP(x) ((x)->regs[29])
#define PT_REGS_IP(x) ((x)->cp0_epc)
-#elif defined(__powerpc__)
+#elif defined(bpf_target_powerpc)
#define PT_REGS_PARM1(x) ((x)->gpr[3])
#define PT_REGS_PARM2(x) ((x)->gpr[4])
@@ -173,7 +213,7 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->nip)
-#elif defined(__sparc__)
+#elif defined(bpf_target_sparc)
#define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
#define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
@@ -183,6 +223,8 @@ static int (*bpf_skb_change_head)(void *
#define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
#define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
#define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])
+
+/* Should this also be a bpf_target check for the sparc case? */
#if defined(__arch64__)
#define PT_REGS_IP(x) ((x)->tpc)
#else
@@ -191,10 +233,10 @@ static int (*bpf_skb_change_head)(void *
#endif
-#ifdef __powerpc__
+#ifdef bpf_target_powerpc
#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; })
#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
-#elif defined(__sparc__)
+#elif bpf_target_sparc
#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); })
#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
#else
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