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bus/fsl-mc: Add generic implementation for open/reset/close commands
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> Link: https://lore.kernel.org/r/20210922110530.24736-1-diana.craciun@oss.nxp.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Diana Craciun
Alex Williamson
parent
5816b3e657
commit
fec2432c9a
@ -15,7 +15,8 @@ mc-bus-driver-objs := fsl-mc-bus.o \
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dprc-driver.o \
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fsl-mc-allocator.o \
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fsl-mc-msi.o \
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dpmcp.o
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dpmcp.o \
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obj-api.o
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# MC userspace support
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obj-$(CONFIG_FSL_MC_UAPI_SUPPORT) += fsl-mc-uapi.o
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@ -48,7 +48,6 @@ struct dpmng_rsp_get_version {
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/* DPMCP command IDs */
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#define DPMCP_CMDID_CLOSE DPMCP_CMD(0x800)
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#define DPMCP_CMDID_OPEN DPMCP_CMD(0x80b)
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#define DPMCP_CMDID_RESET DPMCP_CMD(0x005)
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struct dpmcp_cmd_open {
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@ -91,7 +90,6 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
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/* DPRC command IDs */
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#define DPRC_CMDID_CLOSE DPRC_CMD(0x800)
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#define DPRC_CMDID_OPEN DPRC_CMD(0x805)
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#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)
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#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
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@ -453,7 +451,6 @@ int dprc_get_connection(struct fsl_mc_io *mc_io,
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/* Command IDs */
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#define DPBP_CMDID_CLOSE DPBP_CMD(0x800)
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#define DPBP_CMDID_OPEN DPBP_CMD(0x804)
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#define DPBP_CMDID_ENABLE DPBP_CMD(0x002)
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#define DPBP_CMDID_DISABLE DPBP_CMD(0x003)
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@ -492,7 +489,6 @@ struct dpbp_rsp_get_attributes {
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/* Command IDs */
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#define DPCON_CMDID_CLOSE DPCON_CMD(0x800)
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#define DPCON_CMDID_OPEN DPCON_CMD(0x808)
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#define DPCON_CMDID_ENABLE DPCON_CMD(0x002)
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#define DPCON_CMDID_DISABLE DPCON_CMD(0x003)
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@ -524,6 +520,41 @@ struct dpcon_cmd_set_notification {
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__le64 user_ctx;
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};
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/*
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* Generic FSL MC API
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*/
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/* generic command versioning */
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#define OBJ_CMD_BASE_VERSION 1
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#define OBJ_CMD_ID_OFFSET 4
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#define OBJ_CMD(id) (((id) << OBJ_CMD_ID_OFFSET) | OBJ_CMD_BASE_VERSION)
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/* open command codes */
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#define DPRTC_CMDID_OPEN OBJ_CMD(0x810)
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#define DPNI_CMDID_OPEN OBJ_CMD(0x801)
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#define DPSW_CMDID_OPEN OBJ_CMD(0x802)
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#define DPIO_CMDID_OPEN OBJ_CMD(0x803)
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#define DPBP_CMDID_OPEN OBJ_CMD(0x804)
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#define DPRC_CMDID_OPEN OBJ_CMD(0x805)
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#define DPDMUX_CMDID_OPEN OBJ_CMD(0x806)
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#define DPCI_CMDID_OPEN OBJ_CMD(0x807)
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#define DPCON_CMDID_OPEN OBJ_CMD(0x808)
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#define DPSECI_CMDID_OPEN OBJ_CMD(0x809)
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#define DPAIOP_CMDID_OPEN OBJ_CMD(0x80a)
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#define DPMCP_CMDID_OPEN OBJ_CMD(0x80b)
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#define DPMAC_CMDID_OPEN OBJ_CMD(0x80c)
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#define DPDCEI_CMDID_OPEN OBJ_CMD(0x80d)
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#define DPDMAI_CMDID_OPEN OBJ_CMD(0x80e)
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#define DPDBG_CMDID_OPEN OBJ_CMD(0x80f)
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/* Generic object command IDs */
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#define OBJ_CMDID_CLOSE OBJ_CMD(0x800)
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#define OBJ_CMDID_RESET OBJ_CMD(0x005)
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struct fsl_mc_obj_cmd_open {
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__le32 obj_id;
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};
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/**
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* struct fsl_mc_resource_pool - Pool of MC resources of a given
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103
drivers/bus/fsl-mc/obj-api.c
Normal file
103
drivers/bus/fsl-mc/obj-api.c
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@ -0,0 +1,103 @@
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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
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/*
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* Copyright 2021 NXP
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*
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*/
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#include <linux/kernel.h>
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#include <linux/fsl/mc.h>
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#include "fsl-mc-private.h"
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static int fsl_mc_get_open_cmd_id(const char *type)
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{
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static const struct {
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int cmd_id;
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const char *type;
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} dev_ids[] = {
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{ DPRTC_CMDID_OPEN, "dprtc" },
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{ DPRC_CMDID_OPEN, "dprc" },
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{ DPNI_CMDID_OPEN, "dpni" },
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{ DPIO_CMDID_OPEN, "dpio" },
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{ DPSW_CMDID_OPEN, "dpsw" },
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{ DPBP_CMDID_OPEN, "dpbp" },
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{ DPCON_CMDID_OPEN, "dpcon" },
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{ DPMCP_CMDID_OPEN, "dpmcp" },
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{ DPMAC_CMDID_OPEN, "dpmac" },
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{ DPSECI_CMDID_OPEN, "dpseci" },
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{ DPDMUX_CMDID_OPEN, "dpdmux" },
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{ DPDCEI_CMDID_OPEN, "dpdcei" },
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{ DPAIOP_CMDID_OPEN, "dpaiop" },
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{ DPCI_CMDID_OPEN, "dpci" },
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{ DPDMAI_CMDID_OPEN, "dpdmai" },
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{ DPDBG_CMDID_OPEN, "dpdbg" },
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{ 0, NULL }
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};
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int i;
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for (i = 0; dev_ids[i].type; i++)
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if (!strcmp(dev_ids[i].type, type))
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return dev_ids[i].cmd_id;
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return -1;
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}
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int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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int obj_id,
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char *obj_type,
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u16 *token)
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{
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struct fsl_mc_command cmd = { 0 };
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struct fsl_mc_obj_cmd_open *cmd_params;
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int err = 0;
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int cmd_id = fsl_mc_get_open_cmd_id(obj_type);
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if (cmd_id == -1)
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return -ENODEV;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(cmd_id, cmd_flags, 0);
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cmd_params = (struct fsl_mc_obj_cmd_open *)cmd.params;
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cmd_params->obj_id = cpu_to_le32(obj_id);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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*token = mc_cmd_hdr_read_token(&cmd);
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return err;
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}
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EXPORT_SYMBOL_GPL(fsl_mc_obj_open);
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int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(OBJ_CMDID_CLOSE, cmd_flags,
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token);
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/* send command to mc*/
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return mc_send_command(mc_io, &cmd);
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}
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EXPORT_SYMBOL_GPL(fsl_mc_obj_close);
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int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(OBJ_CMDID_RESET, cmd_flags,
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token);
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/* send command to mc*/
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return mc_send_command(mc_io, &cmd);
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}
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EXPORT_SYMBOL_GPL(fsl_mc_obj_reset);
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@ -620,6 +620,20 @@ int dpcon_reset(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token);
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int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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int obj_id,
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char *obj_type,
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u16 *token);
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int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token);
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int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token);
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/**
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* struct dpcon_attr - Structure representing DPCON attributes
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* @id: DPCON object ID
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