layerscape: add patches-5.4

Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

1 files changed, 183 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/821-vfio-0009-vfio-fsl-mc-Add-read-write-support-for-fsl-mc-device.patch b/target/linux/layerscape/patches-5.4/821-vfio-0009-vfio-fsl-mc-Add-read-write-support-for-fsl-mc-device.patch
new file mode 100644
index 0000000000..5d3d9632ae
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/821-vfio-0009-vfio-fsl-mc-Add-read-write-support-for-fsl-mc-device.patch
@@ -0,0 +1,183 @@
+From c4fbb93e85b13edc174fa6fc3105341f646305e4 Mon Sep 17 00:00:00 2001
+From: Diana Craciun <diana.craciun@nxp.com>
+Date: Wed, 2 Oct 2019 11:14:52 +0300
+Subject: [PATCH] vfio/fsl-mc: Add read/write support for fsl-mc devices
+
+This patch adds support to read and write ioctls for
+fsl-mc devices. Only read-write to DPRC/DPMCP devices
+are supported while read writes on other fsl-mc devices
+is not supported by this patch.
+
+Also current patch limits userspace to write complete
+64byte command once and read 64byte response by one ioctl.
+
+Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
+Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
+---
+ drivers/vfio/fsl-mc/vfio_fsl_mc.c         | 125 +++++++++++++++++++++++++++++-
+ drivers/vfio/fsl-mc/vfio_fsl_mc_private.h |   1 +
+ 2 files changed, 124 insertions(+), 2 deletions(-)
+
+--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
++++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+@@ -12,6 +12,7 @@
+ #include <linux/types.h>
+ #include <linux/vfio.h>
+ #include <linux/fsl/mc.h>
++#include <linux/delay.h>
+ 
+ #include "vfio_fsl_mc_private.h"
+ 
+@@ -112,6 +113,11 @@ static int vfio_fsl_mc_regions_init(stru
+ }
+ static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
+ {
++	int i;
++
++	for (i = 0; i < vdev->num_regions; i++)
++		iounmap(vdev->regions[i].ioaddr);
++
+ 	vdev->num_regions = 0;
+ 	kfree(vdev->regions);
+ }
+@@ -308,13 +314,128 @@ static long vfio_fsl_mc_ioctl(void *devi
+ static ssize_t vfio_fsl_mc_read(void *device_data, char __user *buf,
+ 				size_t count, loff_t *ppos)
+ {
+-	return -EINVAL;
++	struct vfio_fsl_mc_device *vdev = device_data;
++	unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
++	loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
++	struct vfio_fsl_mc_region *region;
++	uint64_t data[8];
++	int i;
++
++	/* Read ioctl supported only for DPRC and DPMCP device */
++	if (strcmp(vdev->mc_dev->obj_desc.type, "dprc") &&
++	    strcmp(vdev->mc_dev->obj_desc.type, "dpmcp"))
++		return -EINVAL;
++
++	if (index >= vdev->num_regions)
++		return -EINVAL;
++
++	region = &vdev->regions[index];
++
++	if (!(region->flags & VFIO_REGION_INFO_FLAG_READ))
++		return -EINVAL;
++
++
++	if (!region->ioaddr) {
++		region->ioaddr = ioremap_nocache(region->addr, region->size);
++		if (!region->ioaddr)
++			return -ENOMEM;
++	}
++
++	if (count != 64 || off != 0)
++		return -EINVAL;
++
++	for (i = 7; i >= 0; i--)
++		data[i] = readq(region->ioaddr + i * sizeof(uint64_t));
++
++	if (copy_to_user(buf, data, 64))
++		return -EFAULT;
++
++	return count;
+ }
+ 
++#define MC_CMD_COMPLETION_TIMEOUT_MS    5000
++#define MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS    500
++
++static int vfio_fsl_mc_send_command(void __iomem *ioaddr, uint64_t *cmd_data)
++{
++	int i;
++	enum mc_cmd_status status;
++	unsigned long timeout_usecs = MC_CMD_COMPLETION_TIMEOUT_MS * 1000;
++
++	/* Write at command parameter into portal */
++	for (i = 7; i >= 1; i--)
++		writeq_relaxed(cmd_data[i], ioaddr + i * sizeof(uint64_t));
++
++	/* Write command header in the end */
++	writeq(cmd_data[0], ioaddr);
++
++	/* Wait for response before returning to user-space
++	 * This can be optimized in future to even prepare response
++	 * before returning to user-space and avoid read ioctl.
++	 */
++	for (;;) {
++		u64 header;
++		struct mc_cmd_header *resp_hdr;
++
++		header = cpu_to_le64(readq_relaxed(ioaddr));
++
++		resp_hdr = (struct mc_cmd_header *)&header;
++		status = (enum mc_cmd_status)resp_hdr->status;
++		if (status != MC_CMD_STATUS_READY)
++			break;
++
++		udelay(MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS);
++		timeout_usecs -= MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS;
++		if (timeout_usecs == 0)
++			return -ETIMEDOUT;
++	}
++
++	return 0;
++}
++
++
+ static ssize_t vfio_fsl_mc_write(void *device_data, const char __user *buf,
+ 				 size_t count, loff_t *ppos)
+ {
+-	return -EINVAL;
++	struct vfio_fsl_mc_device *vdev = device_data;
++	unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
++	loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
++	struct vfio_fsl_mc_region *region;
++	uint64_t data[8];
++	int ret;
++
++
++	/* Write ioctl supported only for DPRC and DPMCP device */
++	if (strcmp(vdev->mc_dev->obj_desc.type, "dprc") &&
++	    strcmp(vdev->mc_dev->obj_desc.type, "dpmcp"))
++		return -EINVAL;
++
++	if (index >= vdev->num_regions)
++		return -EINVAL;
++
++	region = &vdev->regions[index];
++
++	if (!(region->flags & VFIO_REGION_INFO_FLAG_WRITE))
++		return -EINVAL;
++
++	if (!region->ioaddr) {
++		region->ioaddr = ioremap_nocache(region->addr, region->size);
++		if (!region->ioaddr)
++			return -ENOMEM;
++	}
++
++	if (count != 64 || off != 0)
++		return -EINVAL;
++
++	if (copy_from_user(&data, buf, 64))
++		return -EFAULT;
++
++	ret = vfio_fsl_mc_send_command(region->ioaddr, data);
++	if (ret)
++		return ret;
++
++	return count;
++
+ }
+ 
+ static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
+--- a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
++++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
+@@ -32,6 +32,7 @@ struct vfio_fsl_mc_region {
+ 	u32			type;
+ 	u64			addr;
+ 	resource_size_t		size;
++	void __iomem		*ioaddr;
+ };
+ 
+ struct vfio_fsl_mc_device {