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https://github.com/edk2-porting/linux-next.git
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3e0ca3c38d
We need to ensure DMA engine could be stopped in order for kexec to start the next kernel. So add the shutdown operation support. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20200227042841.18358-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
180 lines
6.1 KiB
C
180 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 NXP */
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#ifndef __FSL_DPDMAI_H
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#define __FSL_DPDMAI_H
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/* DPDMAI Version */
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#define DPDMAI_VER_MAJOR 2
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#define DPDMAI_VER_MINOR 2
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#define DPDMAI_CMD_BASE_VERSION 0
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#define DPDMAI_CMD_ID_OFFSET 4
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#define DPDMAI_CMDID_FORMAT(x) (((x) << DPDMAI_CMD_ID_OFFSET) | \
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DPDMAI_CMD_BASE_VERSION)
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/* Command IDs */
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#define DPDMAI_CMDID_CLOSE DPDMAI_CMDID_FORMAT(0x800)
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#define DPDMAI_CMDID_OPEN DPDMAI_CMDID_FORMAT(0x80E)
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#define DPDMAI_CMDID_CREATE DPDMAI_CMDID_FORMAT(0x90E)
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#define DPDMAI_CMDID_DESTROY DPDMAI_CMDID_FORMAT(0x900)
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#define DPDMAI_CMDID_ENABLE DPDMAI_CMDID_FORMAT(0x002)
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#define DPDMAI_CMDID_DISABLE DPDMAI_CMDID_FORMAT(0x003)
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#define DPDMAI_CMDID_GET_ATTR DPDMAI_CMDID_FORMAT(0x004)
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#define DPDMAI_CMDID_RESET DPDMAI_CMDID_FORMAT(0x005)
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#define DPDMAI_CMDID_IS_ENABLED DPDMAI_CMDID_FORMAT(0x006)
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#define DPDMAI_CMDID_SET_IRQ DPDMAI_CMDID_FORMAT(0x010)
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#define DPDMAI_CMDID_GET_IRQ DPDMAI_CMDID_FORMAT(0x011)
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#define DPDMAI_CMDID_SET_IRQ_ENABLE DPDMAI_CMDID_FORMAT(0x012)
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#define DPDMAI_CMDID_GET_IRQ_ENABLE DPDMAI_CMDID_FORMAT(0x013)
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#define DPDMAI_CMDID_SET_IRQ_MASK DPDMAI_CMDID_FORMAT(0x014)
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#define DPDMAI_CMDID_GET_IRQ_MASK DPDMAI_CMDID_FORMAT(0x015)
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#define DPDMAI_CMDID_GET_IRQ_STATUS DPDMAI_CMDID_FORMAT(0x016)
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#define DPDMAI_CMDID_CLEAR_IRQ_STATUS DPDMAI_CMDID_FORMAT(0x017)
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#define DPDMAI_CMDID_SET_RX_QUEUE DPDMAI_CMDID_FORMAT(0x1A0)
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#define DPDMAI_CMDID_GET_RX_QUEUE DPDMAI_CMDID_FORMAT(0x1A1)
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#define DPDMAI_CMDID_GET_TX_QUEUE DPDMAI_CMDID_FORMAT(0x1A2)
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#define MC_CMD_HDR_TOKEN_O 32 /* Token field offset */
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#define MC_CMD_HDR_TOKEN_S 16 /* Token field size */
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#define MAKE_UMASK64(_width) \
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((u64)((_width) < 64 ? ((u64)1 << (_width)) - 1 : (u64)-1))
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/* Data Path DMA Interface API
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* Contains initialization APIs and runtime control APIs for DPDMAI
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*/
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/**
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* Maximum number of Tx/Rx priorities per DPDMAI object
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*/
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#define DPDMAI_PRIO_NUM 2
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/* DPDMAI queue modification options */
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/**
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* Select to modify the user's context associated with the queue
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*/
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#define DPDMAI_QUEUE_OPT_USER_CTX 0x1
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/**
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* Select to modify the queue's destination
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*/
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#define DPDMAI_QUEUE_OPT_DEST 0x2
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/**
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* struct dpdmai_cfg - Structure representing DPDMAI configuration
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* @priorities: Priorities for the DMA hardware processing; valid priorities are
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* configured with values 1-8; the entry following last valid entry
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* should be configured with 0
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*/
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struct dpdmai_cfg {
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u8 priorities[DPDMAI_PRIO_NUM];
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};
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/**
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* struct dpdmai_attr - Structure representing DPDMAI attributes
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* @id: DPDMAI object ID
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* @version: DPDMAI version
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* @num_of_priorities: number of priorities
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*/
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struct dpdmai_attr {
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int id;
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/**
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* struct version - DPDMAI version
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* @major: DPDMAI major version
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* @minor: DPDMAI minor version
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*/
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struct {
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u16 major;
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u16 minor;
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} version;
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u8 num_of_priorities;
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};
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/**
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* enum dpdmai_dest - DPDMAI destination types
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* @DPDMAI_DEST_NONE: Unassigned destination; The queue is set in parked mode
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* and does not generate FQDAN notifications; user is expected to dequeue
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* from the queue based on polling or other user-defined method
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* @DPDMAI_DEST_DPIO: The queue is set in schedule mode and generates FQDAN
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* notifications to the specified DPIO; user is expected to dequeue
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* from the queue only after notification is received
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* @DPDMAI_DEST_DPCON: The queue is set in schedule mode and does not generate
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* FQDAN notifications, but is connected to the specified DPCON object;
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* user is expected to dequeue from the DPCON channel
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*/
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enum dpdmai_dest {
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DPDMAI_DEST_NONE = 0,
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DPDMAI_DEST_DPIO = 1,
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DPDMAI_DEST_DPCON = 2
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};
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/**
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* struct dpdmai_dest_cfg - Structure representing DPDMAI destination parameters
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* @dest_type: Destination type
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* @dest_id: Either DPIO ID or DPCON ID, depending on the destination type
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* @priority: Priority selection within the DPIO or DPCON channel; valid values
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* are 0-1 or 0-7, depending on the number of priorities in that
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* channel; not relevant for 'DPDMAI_DEST_NONE' option
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*/
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struct dpdmai_dest_cfg {
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enum dpdmai_dest dest_type;
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int dest_id;
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u8 priority;
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};
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/**
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* struct dpdmai_rx_queue_cfg - DPDMAI RX queue configuration
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* @options: Flags representing the suggested modifications to the queue;
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* Use any combination of 'DPDMAI_QUEUE_OPT_<X>' flags
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* @user_ctx: User context value provided in the frame descriptor of each
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* dequeued frame;
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* valid only if 'DPDMAI_QUEUE_OPT_USER_CTX' is contained in 'options'
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* @dest_cfg: Queue destination parameters;
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* valid only if 'DPDMAI_QUEUE_OPT_DEST' is contained in 'options'
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*/
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struct dpdmai_rx_queue_cfg {
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struct dpdmai_dest_cfg dest_cfg;
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u32 options;
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u64 user_ctx;
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};
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/**
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* struct dpdmai_rx_queue_attr - Structure representing attributes of Rx queues
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* @user_ctx: User context value provided in the frame descriptor of each
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* dequeued frame
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* @dest_cfg: Queue destination configuration
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* @fqid: Virtual FQID value to be used for dequeue operations
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*/
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struct dpdmai_rx_queue_attr {
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struct dpdmai_dest_cfg dest_cfg;
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u64 user_ctx;
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u32 fqid;
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};
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int dpdmai_open(struct fsl_mc_io *mc_io, u32 cmd_flags,
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int dpdmai_id, u16 *token);
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int dpdmai_close(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
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int dpdmai_destroy(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
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int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags,
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const struct dpdmai_cfg *cfg, u16 *token);
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int dpdmai_enable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
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int dpdmai_disable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
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int dpdmai_reset(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token);
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int dpdmai_get_attributes(struct fsl_mc_io *mc_io, u32 cmd_flags,
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u16 token, struct dpdmai_attr *attr);
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int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
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u8 priority, const struct dpdmai_rx_queue_cfg *cfg);
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int dpdmai_get_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
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u8 priority, struct dpdmai_rx_queue_attr *attr);
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int dpdmai_get_tx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
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u16 token, u8 priority, u32 *fqid);
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#endif /* __FSL_DPDMAI_H */
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