openwrtv4/target/linux/layerscape/patches-4.4/7018-devres-add-devm_alloc_percpu.patch
Yutang Jiang c6c731fe31 layerscape: add 64b/32b target for ls1043ardb device
Add support for NXP layerscape ls1043ardb 64b/32b Dev board.

LS1043a is an SoC with 4x64-bit up to 1.6 GHz ARMv8 A53 cores.
ls1043ardb support features as: 2GB DDR4, 128MB NOR/512MB NAND, USB3.0, eSDHC,
I2C, GPIO, PCIe/Mini-PCIe, 6x1G/1x10G network port, etc.

64b/32b ls1043ardb target is using 4.4 kernel, and rcw/u-boot/fman images from
NXP QorIQ SDK release.

All of 4.4 kernel patches porting from SDK release or upstream.

QorIQ SDK ISOs can be downloaded from this location:
http://www.nxp.com/products/software-and-tools/run-time-software/linux-sdk/linux-sdk-for-qoriq-processors:SDKLINUX

Signed-off-by: Yutang Jiang <yutang.jiang@nxp.com>
2016-10-31 17:00:10 +01:00

138 lines
3.9 KiB
Diff

From f7792176d939e79b4f525114a95d0fd8266bef8e Mon Sep 17 00:00:00 2001
From: Madalin Bucur <madalin.bucur@freescale.com>
Date: Wed, 19 Nov 2014 13:06:54 +0200
Subject: [PATCH 18/70] devres: add devm_alloc_percpu()
Introduce managed counterparts for alloc_percpu() and free_percpu().
Add devm_alloc_percpu() and devm_free_percpu() into the managed
interfaces list.
Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
Change-Id: I93546348e7b0e1974fda8b6c7a3b3710ce45b724
Reviewed-on: http://git.am.freescale.net:8181/24140
Reviewed-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com>
Tested-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com>
Conflicts:
Documentation/driver-model/devres.txt
drivers/base/devres.c
Conflicts:
drivers/base/devres.c
---
Documentation/driver-model/devres.txt | 4 +++
drivers/base/devres.c | 63 +++++++++++++++++++++++++++++++++
include/linux/device.h | 19 ++++++++++
3 files changed, 86 insertions(+)
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -321,6 +321,10 @@ PHY
devm_usb_get_phy()
devm_usb_put_phy()
+PER-CPU MEM
+ devm_alloc_percpu()
+ devm_free_percpu()
+
PINCTRL
devm_pinctrl_get()
devm_pinctrl_put()
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -985,3 +985,66 @@ void devm_free_pages(struct device *dev,
&devres));
}
EXPORT_SYMBOL_GPL(devm_free_pages);
+
+static void devm_percpu_release(struct device *dev, void *pdata)
+{
+ void __percpu *p;
+
+ p = *(void __percpu **)pdata;
+ free_percpu(p);
+}
+
+static int devm_percpu_match(struct device *dev, void *data, void *p)
+{
+ struct devres *devr = container_of(data, struct devres, data);
+
+ return *(void **)devr->data == p;
+}
+
+/**
+ * __devm_alloc_percpu - Resource-managed alloc_percpu
+ * @dev: Device to allocate per-cpu memory for
+ * @size: Size of per-cpu memory to allocate
+ * @align: Alignement of per-cpu memory to allocate
+ *
+ * Managed alloc_percpu. Per-cpu memory allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * RETURNS:
+ * Pointer to allocated memory on success, NULL on failure.
+ */
+void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
+ size_t align)
+{
+ void *p;
+ void __percpu *pcpu;
+
+ pcpu = __alloc_percpu(size, align);
+ if (!pcpu)
+ return NULL;
+
+ p = devres_alloc(devm_percpu_release, sizeof(void *), GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ *(void __percpu **)p = pcpu;
+
+ devres_add(dev, p);
+
+ return pcpu;
+}
+EXPORT_SYMBOL_GPL(__devm_alloc_percpu);
+
+/**
+ * devm_free_percpu - Resource-managed free_percpu
+ * @dev: Device this memory belongs to
+ * @pdata: Per-cpu memory to free
+ *
+ * Free memory allocated with devm_alloc_percpu().
+ */
+void devm_free_percpu(struct device *dev, void __percpu *pdata)
+{
+ WARN_ON(devres_destroy(dev, devm_percpu_release, devm_percpu_match,
+ (void *)pdata));
+}
+EXPORT_SYMBOL_GPL(devm_free_percpu);
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -681,6 +681,25 @@ void __iomem *devm_ioremap_resource(stru
int devm_add_action(struct device *dev, void (*action)(void *), void *data);
void devm_remove_action(struct device *dev, void (*action)(void *), void *data);
+/**
+ * devm_alloc_percpu - Resource-managed alloc_percpu
+ * @dev: Device to allocate per-cpu memory for
+ * @type: Type to allocate per-cpu memory for
+ *
+ * Managed alloc_percpu. Per-cpu memory allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * RETURNS:
+ * Pointer to allocated memory on success, NULL on failure.
+ */
+#define devm_alloc_percpu(dev, type) \
+ (typeof(type) __percpu *)__devm_alloc_percpu(dev, sizeof(type), \
+ __alignof__(type))
+
+void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
+ size_t align);
+void devm_free_percpu(struct device *dev, void __percpu *pdata);
+
struct device_dma_parameters {
/*
* a low level driver may set these to teach IOMMU code about