* [PATCH v2 1/2] bus/fsl-mc: Add generic implementation for open/reset/close commands
@ 2021-09-22 11:05 Diana Craciun
2021-09-22 11:05 ` [PATCH v2 2/2] vfio/fsl-mc: Add per device reset support Diana Craciun
0 siblings, 1 reply; 4+ messages in thread
From: Diana Craciun @ 2021-09-22 11:05 UTC (permalink / raw)
To: Laurentiu Tudor, linux-kernel, gregkh, Alex Williamson, kvm
Cc: Li Yang, linux-arm-kernel, Diana Craciun
The open/reset/close commands format is similar for all objects.
Currently there are multiple implementations for these commands
scattered through various drivers. The code is cavsi-identical.
Create a generic implementation for the open/reset/close commands.
One of the consumer will be the VFIO driver which needs to
be able to reset a device.
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
drivers/bus/fsl-mc/Makefile | 3 +-
drivers/bus/fsl-mc/fsl-mc-private.h | 39 +++++++++--
drivers/bus/fsl-mc/obj-api.c | 103 ++++++++++++++++++++++++++++
include/linux/fsl/mc.h | 14 ++++
4 files changed, 154 insertions(+), 5 deletions(-)
create mode 100644 drivers/bus/fsl-mc/obj-api.c
diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile
index 4ae292a30e53..892946245527 100644
--- a/drivers/bus/fsl-mc/Makefile
+++ b/drivers/bus/fsl-mc/Makefile
@@ -15,7 +15,8 @@ mc-bus-driver-objs := fsl-mc-bus.o \
dprc-driver.o \
fsl-mc-allocator.o \
fsl-mc-msi.o \
- dpmcp.o
+ dpmcp.o \
+ obj-api.o
# MC userspace support
obj-$(CONFIG_FSL_MC_UAPI_SUPPORT) += fsl-mc-uapi.o
diff --git a/drivers/bus/fsl-mc/fsl-mc-private.h b/drivers/bus/fsl-mc/fsl-mc-private.h
index 1958fa065360..b3520ea1b9f4 100644
--- a/drivers/bus/fsl-mc/fsl-mc-private.h
+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
@@ -48,7 +48,6 @@ struct dpmng_rsp_get_version {
/* DPMCP command IDs */
#define DPMCP_CMDID_CLOSE DPMCP_CMD(0x800)
-#define DPMCP_CMDID_OPEN DPMCP_CMD(0x80b)
#define DPMCP_CMDID_RESET DPMCP_CMD(0x005)
struct dpmcp_cmd_open {
@@ -91,7 +90,6 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
/* DPRC command IDs */
#define DPRC_CMDID_CLOSE DPRC_CMD(0x800)
-#define DPRC_CMDID_OPEN DPRC_CMD(0x805)
#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)
#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
@@ -453,7 +451,6 @@ int dprc_get_connection(struct fsl_mc_io *mc_io,
/* Command IDs */
#define DPBP_CMDID_CLOSE DPBP_CMD(0x800)
-#define DPBP_CMDID_OPEN DPBP_CMD(0x804)
#define DPBP_CMDID_ENABLE DPBP_CMD(0x002)
#define DPBP_CMDID_DISABLE DPBP_CMD(0x003)
@@ -492,7 +489,6 @@ struct dpbp_rsp_get_attributes {
/* Command IDs */
#define DPCON_CMDID_CLOSE DPCON_CMD(0x800)
-#define DPCON_CMDID_OPEN DPCON_CMD(0x808)
#define DPCON_CMDID_ENABLE DPCON_CMD(0x002)
#define DPCON_CMDID_DISABLE DPCON_CMD(0x003)
@@ -524,6 +520,41 @@ struct dpcon_cmd_set_notification {
__le64 user_ctx;
};
+/*
+ * Generic FSL MC API
+ */
+
+/* generic command versioning */
+#define OBJ_CMD_BASE_VERSION 1
+#define OBJ_CMD_ID_OFFSET 4
+
+#define OBJ_CMD(id) (((id) << OBJ_CMD_ID_OFFSET) | OBJ_CMD_BASE_VERSION)
+
+/* open command codes */
+#define DPRTC_CMDID_OPEN OBJ_CMD(0x810)
+#define DPNI_CMDID_OPEN OBJ_CMD(0x801)
+#define DPSW_CMDID_OPEN OBJ_CMD(0x802)
+#define DPIO_CMDID_OPEN OBJ_CMD(0x803)
+#define DPBP_CMDID_OPEN OBJ_CMD(0x804)
+#define DPRC_CMDID_OPEN OBJ_CMD(0x805)
+#define DPDMUX_CMDID_OPEN OBJ_CMD(0x806)
+#define DPCI_CMDID_OPEN OBJ_CMD(0x807)
+#define DPCON_CMDID_OPEN OBJ_CMD(0x808)
+#define DPSECI_CMDID_OPEN OBJ_CMD(0x809)
+#define DPAIOP_CMDID_OPEN OBJ_CMD(0x80a)
+#define DPMCP_CMDID_OPEN OBJ_CMD(0x80b)
+#define DPMAC_CMDID_OPEN OBJ_CMD(0x80c)
+#define DPDCEI_CMDID_OPEN OBJ_CMD(0x80d)
+#define DPDMAI_CMDID_OPEN OBJ_CMD(0x80e)
+#define DPDBG_CMDID_OPEN OBJ_CMD(0x80f)
+
+/* Generic object command IDs */
+#define OBJ_CMDID_CLOSE OBJ_CMD(0x800)
+#define OBJ_CMDID_RESET OBJ_CMD(0x005)
+
+struct fsl_mc_obj_cmd_open {
+ __le32 obj_id;
+};
/**
* struct fsl_mc_resource_pool - Pool of MC resources of a given
diff --git a/drivers/bus/fsl-mc/obj-api.c b/drivers/bus/fsl-mc/obj-api.c
new file mode 100644
index 000000000000..06c1dd84e38d
--- /dev/null
+++ b/drivers/bus/fsl-mc/obj-api.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2021 NXP
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+static int fsl_mc_get_open_cmd_id(const char *type)
+{
+ static const struct {
+ int cmd_id;
+ const char *type;
+ } dev_ids[] = {
+ { DPRTC_CMDID_OPEN, "dprtc" },
+ { DPRC_CMDID_OPEN, "dprc" },
+ { DPNI_CMDID_OPEN, "dpni" },
+ { DPIO_CMDID_OPEN, "dpio" },
+ { DPSW_CMDID_OPEN, "dpsw" },
+ { DPBP_CMDID_OPEN, "dpbp" },
+ { DPCON_CMDID_OPEN, "dpcon" },
+ { DPMCP_CMDID_OPEN, "dpmcp" },
+ { DPMAC_CMDID_OPEN, "dpmac" },
+ { DPSECI_CMDID_OPEN, "dpseci" },
+ { DPDMUX_CMDID_OPEN, "dpdmux" },
+ { DPDCEI_CMDID_OPEN, "dpdcei" },
+ { DPAIOP_CMDID_OPEN, "dpaiop" },
+ { DPCI_CMDID_OPEN, "dpci" },
+ { DPDMAI_CMDID_OPEN, "dpdmai" },
+ { DPDBG_CMDID_OPEN, "dpdbg" },
+ { 0, NULL }
+ };
+ int i;
+
+ for (i = 0; dev_ids[i].type; i++)
+ if (!strcmp(dev_ids[i].type, type))
+ return dev_ids[i].cmd_id;
+
+ return -1;
+}
+
+int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ int obj_id,
+ char *obj_type,
+ u16 *token)
+{
+ struct fsl_mc_command cmd = { 0 };
+ struct fsl_mc_obj_cmd_open *cmd_params;
+ int err = 0;
+ int cmd_id = fsl_mc_get_open_cmd_id(obj_type);
+
+ if (cmd_id == -1)
+ return -ENODEV;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(cmd_id, cmd_flags, 0);
+ cmd_params = (struct fsl_mc_obj_cmd_open *)cmd.params;
+ cmd_params->obj_id = cpu_to_le32(obj_id);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ *token = mc_cmd_hdr_read_token(&cmd);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_open);
+
+int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token)
+{
+ struct fsl_mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(OBJ_CMDID_CLOSE, cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_close);
+
+int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token)
+{
+ struct fsl_mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(OBJ_CMDID_RESET, cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_obj_reset);
diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h
index 30ece3ae6df7..e026f6c48b49 100644
--- a/include/linux/fsl/mc.h
+++ b/include/linux/fsl/mc.h
@@ -620,6 +620,20 @@ int dpcon_reset(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token);
+int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ int obj_id,
+ char *obj_type,
+ u16 *token);
+
+int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token);
+
+int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ u16 token);
+
/**
* struct dpcon_attr - Structure representing DPCON attributes
* @id: DPCON object ID
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v2 2/2] vfio/fsl-mc: Add per device reset support
2021-09-22 11:05 [PATCH v2 1/2] bus/fsl-mc: Add generic implementation for open/reset/close commands Diana Craciun
@ 2021-09-22 11:05 ` Diana Craciun
2021-09-28 13:55 ` Laurentiu Tudor
0 siblings, 1 reply; 4+ messages in thread
From: Diana Craciun @ 2021-09-22 11:05 UTC (permalink / raw)
To: Laurentiu Tudor, linux-kernel, gregkh, Alex Williamson, kvm
Cc: Li Yang, linux-arm-kernel, Diana Craciun
Currently when a fsl-mc device is reset, the entire DPRC container
is reset which is very inefficient because the devices within a
container will be reset multiple times.
Add support for individually resetting a device.
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
---
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 45 ++++++++++++++++++++-----------
1 file changed, 30 insertions(+), 15 deletions(-)
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index 0ead91bfa838..6d7b2d2571a2 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -65,6 +65,34 @@ static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
kfree(vdev->regions);
}
+static int vfio_fsl_mc_reset_device(struct vfio_fsl_mc_device *vdev)
+{
+ struct fsl_mc_device *mc_dev = vdev->mc_dev;
+ int ret = 0;
+
+ if (is_fsl_mc_bus_dprc(vdev->mc_dev)) {
+ return dprc_reset_container(mc_dev->mc_io, 0,
+ mc_dev->mc_handle,
+ mc_dev->obj_desc.id,
+ DPRC_RESET_OPTION_NON_RECURSIVE);
+ } else {
+ u16 token;
+
+ ret = fsl_mc_obj_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
+ mc_dev->obj_desc.type,
+ &token);
+ if (ret)
+ goto out;
+ ret = fsl_mc_obj_reset(mc_dev->mc_io, 0, token);
+ if (ret) {
+ fsl_mc_obj_close(mc_dev->mc_io, 0, token);
+ goto out;
+ }
+ ret = fsl_mc_obj_close(mc_dev->mc_io, 0, token);
+ }
+out:
+ return ret;
+}
static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
{
@@ -78,9 +106,7 @@ static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
vfio_fsl_mc_regions_cleanup(vdev);
/* reset the device before cleaning up the interrupts */
- ret = dprc_reset_container(mc_cont->mc_io, 0, mc_cont->mc_handle,
- mc_cont->obj_desc.id,
- DPRC_RESET_OPTION_NON_RECURSIVE);
+ ret = vfio_fsl_mc_reset_device(vdev);
if (WARN_ON(ret))
dev_warn(&mc_cont->dev,
@@ -203,18 +229,7 @@ static long vfio_fsl_mc_ioctl(struct vfio_device *core_vdev,
}
case VFIO_DEVICE_RESET:
{
- int ret;
- struct fsl_mc_device *mc_dev = vdev->mc_dev;
-
- /* reset is supported only for the DPRC */
- if (!is_fsl_mc_bus_dprc(mc_dev))
- return -ENOTTY;
-
- ret = dprc_reset_container(mc_dev->mc_io, 0,
- mc_dev->mc_handle,
- mc_dev->obj_desc.id,
- DPRC_RESET_OPTION_NON_RECURSIVE);
- return ret;
+ return vfio_fsl_mc_reset_device(vdev);
}
default:
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2 2/2] vfio/fsl-mc: Add per device reset support
2021-09-22 11:05 ` [PATCH v2 2/2] vfio/fsl-mc: Add per device reset support Diana Craciun
@ 2021-09-28 13:55 ` Laurentiu Tudor
2021-10-11 22:19 ` Alex Williamson
0 siblings, 1 reply; 4+ messages in thread
From: Laurentiu Tudor @ 2021-09-28 13:55 UTC (permalink / raw)
To: Diana Craciun, linux-kernel, gregkh, Alex Williamson, kvm
Cc: Li Yang, linux-arm-kernel
On 9/22/2021 2:05 PM, Diana Craciun wrote:
> Currently when a fsl-mc device is reset, the entire DPRC container
> is reset which is very inefficient because the devices within a
> container will be reset multiple times.
> Add support for individually resetting a device.
>
> Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
> ---
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
Best Regards, Laurentiu
> drivers/vfio/fsl-mc/vfio_fsl_mc.c | 45 ++++++++++++++++++++-----------
> 1 file changed, 30 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
> index 0ead91bfa838..6d7b2d2571a2 100644
> --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
> +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
> @@ -65,6 +65,34 @@ static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
> kfree(vdev->regions);
> }
>
> +static int vfio_fsl_mc_reset_device(struct vfio_fsl_mc_device *vdev)
> +{
> + struct fsl_mc_device *mc_dev = vdev->mc_dev;
> + int ret = 0;
> +
> + if (is_fsl_mc_bus_dprc(vdev->mc_dev)) {
> + return dprc_reset_container(mc_dev->mc_io, 0,
> + mc_dev->mc_handle,
> + mc_dev->obj_desc.id,
> + DPRC_RESET_OPTION_NON_RECURSIVE);
> + } else {
> + u16 token;
> +
> + ret = fsl_mc_obj_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
> + mc_dev->obj_desc.type,
> + &token);
> + if (ret)
> + goto out;
> + ret = fsl_mc_obj_reset(mc_dev->mc_io, 0, token);
> + if (ret) {
> + fsl_mc_obj_close(mc_dev->mc_io, 0, token);
> + goto out;
> + }
> + ret = fsl_mc_obj_close(mc_dev->mc_io, 0, token);
> + }
> +out:
> + return ret;
> +}
>
> static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
> {
> @@ -78,9 +106,7 @@ static void vfio_fsl_mc_close_device(struct vfio_device *core_vdev)
> vfio_fsl_mc_regions_cleanup(vdev);
>
> /* reset the device before cleaning up the interrupts */
> - ret = dprc_reset_container(mc_cont->mc_io, 0, mc_cont->mc_handle,
> - mc_cont->obj_desc.id,
> - DPRC_RESET_OPTION_NON_RECURSIVE);
> + ret = vfio_fsl_mc_reset_device(vdev);
>
> if (WARN_ON(ret))
> dev_warn(&mc_cont->dev,
> @@ -203,18 +229,7 @@ static long vfio_fsl_mc_ioctl(struct vfio_device *core_vdev,
> }
> case VFIO_DEVICE_RESET:
> {
> - int ret;
> - struct fsl_mc_device *mc_dev = vdev->mc_dev;
> -
> - /* reset is supported only for the DPRC */
> - if (!is_fsl_mc_bus_dprc(mc_dev))
> - return -ENOTTY;
> -
> - ret = dprc_reset_container(mc_dev->mc_io, 0,
> - mc_dev->mc_handle,
> - mc_dev->obj_desc.id,
> - DPRC_RESET_OPTION_NON_RECURSIVE);
> - return ret;
> + return vfio_fsl_mc_reset_device(vdev);
>
> }
> default:
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2 2/2] vfio/fsl-mc: Add per device reset support
2021-09-28 13:55 ` Laurentiu Tudor
@ 2021-10-11 22:19 ` Alex Williamson
0 siblings, 0 replies; 4+ messages in thread
From: Alex Williamson @ 2021-10-11 22:19 UTC (permalink / raw)
To: Laurentiu Tudor
Cc: Diana Craciun, linux-kernel, gregkh, kvm, Li Yang, linux-arm-kernel
On Tue, 28 Sep 2021 16:55:06 +0300
Laurentiu Tudor <laurentiu.tudor@nxp.com> wrote:
> On 9/22/2021 2:05 PM, Diana Craciun wrote:
> > Currently when a fsl-mc device is reset, the entire DPRC container
> > is reset which is very inefficient because the devices within a
> > container will be reset multiple times.
> > Add support for individually resetting a device.
> >
> > Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
> > ---
>
> Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Applied both to vfio next branch for v5.16, with Laurentiu's R-b added
here. Thanks,
Alex
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-10-11 22:19 UTC | newest]
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