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/* SPDX-License-Identifier: ISC */
/*
* Copyright (c) 2005-2011 Atheros Communications Inc.
* Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
* Copyright (c) 2018 The Linux Foundation. All rights reserved.
*/
#ifndef _CE_H_
#define _CE_H_
#include "hif.h"
#define CE_HTT_H2T_MSG_SRC_NENTRIES 8192
/* Descriptor rings must be aligned to this boundary */
#define CE_DESC_RING_ALIGN 8
#define CE_SEND_FLAG_GATHER 0x00010000
/*
* Copy Engine support: low-level Target-side Copy Engine API.
* This is a hardware access layer used by code that understands
* how to use copy engines.
*/
struct ath10k_ce_pipe;
#define CE_DESC_FLAGS_GATHER (1 << 0)
#define CE_DESC_FLAGS_BYTE_SWAP (1 << 1)
#define CE_WCN3990_DESC_FLAGS_GATHER BIT(31)
#define CE_DESC_ADDR_MASK GENMASK_ULL(34, 0)
#define CE_DESC_ADDR_HI_MASK GENMASK(4, 0)
/* Following desc flags are used in QCA99X0 */
#define CE_DESC_FLAGS_HOST_INT_DIS (1 << 2)
#define CE_DESC_FLAGS_TGT_INT_DIS (1 << 3)
#define CE_DESC_FLAGS_META_DATA_MASK ar->hw_values->ce_desc_meta_data_mask
#define CE_DESC_FLAGS_META_DATA_LSB ar->hw_values->ce_desc_meta_data_lsb
#define CE_DDR_RRI_MASK GENMASK(15, 0)
#define CE_DDR_DRRI_SHIFT 16
struct ce_desc {
__le32 addr;
__le16 nbytes;
__le16 flags; /* %CE_DESC_FLAGS_ */
};
struct ce_desc_64 {
__le64 addr;
__le16 nbytes; /* length in register map */
__le16 flags; /* fw_metadata_high */
__le32 toeplitz_hash_result;
};
#define CE_DESC_SIZE sizeof(struct ce_desc)
#define CE_DESC_SIZE_64 sizeof(struct ce_desc_64)
struct ath10k_ce_ring {
/* Number of entries in this ring; must be power of 2 */
unsigned int nentries;
unsigned int nentries_mask;
/*
* For dest ring, this is the next index to be processed
* by software after it was/is received into.
*
* For src ring, this is the last descriptor that was sent
* and completion processed by software.
*
* Regardless of src or dest ring, this is an invariant
* (modulo ring size):
* write index >= read index >= sw_index
*/
unsigned int sw_index;
/* cached copy */
unsigned int write_index;
/*
* For src ring, this is the next index not yet processed by HW.
* This is a cached copy of the real HW index (read index), used
* for avoiding reading the HW index register more often than
* necessary.
* This extends the invariant:
* write index >= read index >= hw_index >= sw_index
*
* For dest ring, this is currently unused.
*/
/* cached copy */
unsigned int hw_index;
/* Start of DMA-coherent area reserved for descriptors */
/* Host address space */
void *base_addr_owner_space_unaligned;
/* CE address space */
dma_addr_t base_addr_ce_space_unaligned;
/*
* Actual start of descriptors.
* Aligned to descriptor-size boundary.
* Points into reserved DMA-coherent area, above.
*/
/* Host address space */
void *base_addr_owner_space;
/* CE address space */
dma_addr_t base_addr_ce_space;
char *shadow_base_unaligned;
struct ce_desc_64 *shadow_base;
/* keep last */
void *per_transfer_context[];
};
struct ath10k_ce_pipe {
struct ath10k *ar;
unsigned int id;
unsigned int attr_flags;
u32 ctrl_addr;
void (*send_cb)(struct ath10k_ce_pipe *);
void (*recv_cb)(struct ath10k_ce_pipe *);
unsigned int src_sz_max;
struct ath10k_ce_ring *src_ring;
struct ath10k_ce_ring *dest_ring;
const struct ath10k_ce_ops *ops;
};
/* Copy Engine settable attributes */
struct ce_attr;
struct ath10k_bus_ops {
u32 (*read32)(struct ath10k *ar, u32 offset);
void (*write32)(struct ath10k *ar, u32 offset, u32 value);
int (*get_num_banks)(struct ath10k *ar);
};
static inline struct ath10k_ce *ath10k_ce_priv(struct ath10k *ar)
{
return (struct ath10k_ce *)ar->ce_priv;
}
struct ath10k_ce {
/* protects CE info */
spinlock_t ce_lock;
const struct ath10k_bus_ops *bus_ops;
struct ath10k_ce_pipe ce_states[CE_COUNT_MAX];
u32 *vaddr_rri;
dma_addr_t paddr_rri;
};
/*==================Send====================*/
/* ath10k_ce_send flags */
#define CE_SEND_FLAG_BYTE_SWAP 1
/*
* Queue a source buffer to be sent to an anonymous destination buffer.
* ce - which copy engine to use
* buffer - address of buffer
* nbytes - number of bytes to send
* transfer_id - arbitrary ID; reflected to destination
* flags - CE_SEND_FLAG_* values
* Returns 0 on success; otherwise an error status.
*
* Note: If no flags are specified, use CE's default data swap mode.
*
* Implementation note: pushes 1 buffer to Source ring
*/
int ath10k_ce_send(struct ath10k_ce_pipe *ce_state,
void *per_transfer_send_context,
dma_addr_t buffer,
unsigned int nbytes,
/* 14 bits */
unsigned int transfer_id,
unsigned int flags);
int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
void *per_transfer_context,
dma_addr_t buffer,
unsigned int nbytes,
unsigned int transfer_id,
unsigned int flags);
void __ath10k_ce_send_revert(struct ath10k_ce_pipe *pipe);
int ath10k_ce_num_free_src_entries(struct ath10k_ce_pipe *pipe);
/*==================Recv=======================*/
int __ath10k_ce_rx_num_free_bufs(struct ath10k_ce_pipe *pipe);
int ath10k_ce_rx_post_buf(struct ath10k_ce_pipe *pipe, void *ctx,
dma_addr_t paddr);
void ath10k_ce_rx_update_write_idx(struct ath10k_ce_pipe *pipe, u32 nentries);
/* recv flags */
/* Data is byte-swapped */
#define CE_RECV_FLAG_SWAPPED 1
/*
* Supply data for the next completed unprocessed receive descriptor.
* Pops buffer from Dest ring.
*/
int ath10k_ce_completed_recv_next(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
unsigned int *nbytesp);
/*
* Supply data for the next completed unprocessed send descriptor.
* Pops 1 completed send buffer from Source ring.
*/
int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp);
int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp);
/*==================CE Engine Initialization=======================*/
int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id,
const struct ce_attr *attr);
void ath10k_ce_deinit_pipe(struct ath10k *ar, unsigned int ce_id);
int ath10k_ce_alloc_pipe(struct ath10k *ar, int ce_id,
const struct ce_attr *attr);
void ath10k_ce_free_pipe(struct ath10k *ar, int ce_id);
/*==================CE Engine Shutdown=======================*/
/*
* Support clean shutdown by allowing the caller to revoke
* receive buffers. Target DMA must be stopped before using
* this API.
*/
int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
dma_addr_t *bufferp);
int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
unsigned int *nbytesp);
/*
* Support clean shutdown by allowing the caller to cancel
* pending sends. Target DMA must be stopped before using
* this API.
*/
int ath10k_ce_cancel_send_next(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
dma_addr_t *bufferp,
unsigned int *nbytesp,
unsigned int *transfer_idp);
/*==================CE Interrupt Handlers====================*/
void ath10k_ce_per_engine_service_any(struct ath10k *ar);
void ath10k_ce_per_engine_service(struct ath10k *ar, unsigned int ce_id);
void ath10k_ce_disable_interrupt(struct ath10k *ar, int ce_id);
void ath10k_ce_disable_interrupts(struct ath10k *ar);
void ath10k_ce_enable_interrupt(struct ath10k *ar, int ce_id);
void ath10k_ce_enable_interrupts(struct ath10k *ar);
void ath10k_ce_dump_registers(struct ath10k *ar,
struct ath10k_fw_crash_data *crash_data);
void ath10k_ce_alloc_rri(struct ath10k *ar);
void ath10k_ce_free_rri(struct ath10k *ar);
/* ce_attr.flags values */
/* Use NonSnooping PCIe accesses? */
#define CE_ATTR_NO_SNOOP BIT(0)
/* Byte swap data words */
#define CE_ATTR_BYTE_SWAP_DATA BIT(1)
/* Swizzle descriptors? */
#define CE_ATTR_SWIZZLE_DESCRIPTORS BIT(2)
/* no interrupt on copy completion */
#define CE_ATTR_DIS_INTR BIT(3)
/* no interrupt, only polling */
#define CE_ATTR_POLL BIT(4)
/* Attributes of an instance of a Copy Engine */
struct ce_attr {
/* CE_ATTR_* values */
unsigned int flags;
/* #entries in source ring - Must be a power of 2 */
unsigned int src_nentries;
/*
* Max source send size for this CE.
* This is also the minimum size of a destination buffer.
*/
unsigned int src_sz_max;
/* #entries in destination ring - Must be a power of 2 */
unsigned int dest_nentries;
void (*send_cb)(struct ath10k_ce_pipe *);
void (*recv_cb)(struct ath10k_ce_pipe *);
};
struct ath10k_ce_ops {
struct ath10k_ce_ring *(*ce_alloc_src_ring)(struct ath10k *ar,
u32 ce_id,
const struct ce_attr *attr);
struct ath10k_ce_ring *(*ce_alloc_dst_ring)(struct ath10k *ar,
u32 ce_id,
const struct ce_attr *attr);
int (*ce_rx_post_buf)(struct ath10k_ce_pipe *pipe, void *ctx,
dma_addr_t paddr);
int (*ce_completed_recv_next_nolock)(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
u32 *nbytesp);
int (*ce_revoke_recv_next)(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
dma_addr_t *nbytesp);
void (*ce_extract_desc_data)(struct ath10k *ar,
struct ath10k_ce_ring *src_ring,
u32 sw_index, dma_addr_t *bufferp,
u32 *nbytesp, u32 *transfer_idp);
void (*ce_free_pipe)(struct ath10k *ar, int ce_id);
int (*ce_send_nolock)(struct ath10k_ce_pipe *pipe,
void *per_transfer_context,
dma_addr_t buffer, u32 nbytes,
u32 transfer_id, u32 flags);
void (*ce_set_src_ring_base_addr_hi)(struct ath10k *ar,
u32 ce_ctrl_addr,
u64 addr);
void (*ce_set_dest_ring_base_addr_hi)(struct ath10k *ar,
u32 ce_ctrl_addr,
u64 addr);
int (*ce_completed_send_next_nolock)(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp);
};
static inline u32 ath10k_ce_base_address(struct ath10k *ar, unsigned int ce_id)
{
return CE0_BASE_ADDRESS + (CE1_BASE_ADDRESS - CE0_BASE_ADDRESS) * ce_id;
}
#define COPY_ENGINE_ID(COPY_ENGINE_BASE_ADDRESS) (((COPY_ENGINE_BASE_ADDRESS) \
- CE0_BASE_ADDRESS) / (CE1_BASE_ADDRESS - CE0_BASE_ADDRESS))
#define CE_SRC_RING_TO_DESC(baddr, idx) \
(&(((struct ce_desc *)baddr)[idx]))
#define CE_DEST_RING_TO_DESC(baddr, idx) \
(&(((struct ce_desc *)baddr)[idx]))
#define CE_SRC_RING_TO_DESC_64(baddr, idx) \
(&(((struct ce_desc_64 *)baddr)[idx]))
#define CE_DEST_RING_TO_DESC_64(baddr, idx) \
(&(((struct ce_desc_64 *)baddr)[idx]))
/* Ring arithmetic (modulus number of entries in ring, which is a pwr of 2). */
#define CE_RING_DELTA(nentries_mask, fromidx, toidx) \
(((int)(toidx) - (int)(fromidx)) & (nentries_mask))
#define CE_RING_IDX_INCR(nentries_mask, idx) (((idx) + 1) & (nentries_mask))
#define CE_RING_IDX_ADD(nentries_mask, idx, num) \
(((idx) + (num)) & (nentries_mask))
#define CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_LSB \
ar->regs->ce_wrap_intr_sum_host_msi_lsb
#define CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_MASK \
ar->regs->ce_wrap_intr_sum_host_msi_mask
#define CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_GET(x) \
(((x) & CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_MASK) >> \
CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_LSB)
#define CE_WRAPPER_INTERRUPT_SUMMARY_ADDRESS 0x0000
static inline u32 ath10k_ce_interrupt_summary(struct ath10k *ar)
{
struct ath10k_ce *ce = ath10k_ce_priv(ar);
return CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_GET(
ce->bus_ops->read32((ar), CE_WRAPPER_BASE_ADDRESS +
CE_WRAPPER_INTERRUPT_SUMMARY_ADDRESS));
}
/* Host software's Copy Engine configuration. */
#define CE_ATTR_FLAGS 0
/*
* Configuration information for a Copy Engine pipe.
* Passed from Host to Target during startup (one per CE).
*
* NOTE: Structure is shared between Host software and Target firmware!
*/
struct ce_pipe_config {
__le32 pipenum;
__le32 pipedir;
__le32 nentries;
__le32 nbytes_max;
__le32 flags;
__le32 reserved;
};
/*
* Directions for interconnect pipe configuration.
* These definitions may be used during configuration and are shared
* between Host and Target.
*
* Pipe Directions are relative to the Host, so PIPEDIR_IN means
* "coming IN over air through Target to Host" as with a WiFi Rx operation.
* Conversely, PIPEDIR_OUT means "going OUT from Host through Target over air"
* as with a WiFi Tx operation. This is somewhat awkward for the "middle-man"
* Target since things that are "PIPEDIR_OUT" are coming IN to the Target
* over the interconnect.
*/
#define PIPEDIR_NONE 0
#define PIPEDIR_IN 1 /* Target-->Host, WiFi Rx direction */
#define PIPEDIR_OUT 2 /* Host->Target, WiFi Tx direction */
#define PIPEDIR_INOUT 3 /* bidirectional */
/* Establish a mapping between a service/direction and a pipe. */
struct ce_service_to_pipe {
__le32 service_id;
__le32 pipedir;
__le32 pipenum;
};
#endif /* _CE_H_ */