kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 183 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
deleted file mode 100644
index 5d3d9632ae..0000000000
--- a/target/linux/layerscape/patches-5.4/821-vfio-0009-vfio-fsl-mc-Add-read-write-support-for-fsl-mc-device.patch
+++ /dev/null
@@ -1,183 +0,0 @@
-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 {