new file mode 100644
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+/*
+ * Copyright (c) 2005-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _CE_H_
+#define _CE_H_
+
+#include "hif.h"
+
+
+/* Maximum number of Copy Engine's supported */
+#define CE_COUNT_MAX 8
+#define CE_HTT_H2T_MSG_SRC_NENTRIES 2048
+
+/* Descriptor rings must be aligned to this boundary */
+#define CE_DESC_RING_ALIGN 8
+#define CE_SENDLIST_ITEMS_MAX 12
+#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 ce_state;
+
+
+/* Copy Engine operational state */
+enum ce_op_state {
+ CE_UNUSED,
+ CE_PAUSED,
+ CE_RUNNING,
+};
+
+#define CE_DESC_FLAGS_GATHER (1 << 0)
+#define CE_DESC_FLAGS_BYTE_SWAP (1 << 1)
+#define CE_DESC_FLAGS_META_DATA_MASK 0xFFFC
+#define CE_DESC_FLAGS_META_DATA_LSB 3
+
+struct ce_desc {
+ __le32 addr;
+ __le16 nbytes;
+ __le16 flags; /* %CE_DESC_FLAGS_ */
+};
+
+/* Copy Engine Ring internal state */
+struct ce_ring_state {
+ /* 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 */
+ u32 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 */
+ u32 base_addr_ce_space;
+ /*
+ * Start of shadow copy of descriptors, within regular memory.
+ * Aligned to descriptor-size boundary.
+ */
+ void *shadow_base_unaligned;
+ struct ce_desc *shadow_base;
+
+ void **per_transfer_context;
+};
+
+/* Copy Engine internal state */
+struct ce_state {
+ struct ath10k *ar;
+ unsigned int id;
+
+ unsigned int attr_flags;
+
+ u32 ctrl_addr;
+ enum ce_op_state state;
+
+ void (*send_cb) (struct ce_state *ce_state,
+ void *per_transfer_send_context,
+ u32 buffer,
+ unsigned int nbytes,
+ unsigned int transfer_id);
+ void (*recv_cb) (struct ce_state *ce_state,
+ void *per_transfer_recv_context,
+ u32 buffer,
+ unsigned int nbytes,
+ unsigned int transfer_id,
+ unsigned int flags);
+
+ unsigned int src_sz_max;
+ struct ce_ring_state *src_ring;
+ struct ce_ring_state *dest_ring;
+};
+
+struct ce_sendlist_item {
+ /* e.g. buffer or desc list */
+ dma_addr_t data;
+ union {
+ /* simple buffer */
+ unsigned int nbytes;
+ /* Rx descriptor list */
+ unsigned int ndesc;
+ } u;
+ /* externally-specified flags; OR-ed with internal flags */
+ u32 flags;
+};
+
+struct ce_sendlist {
+ unsigned int num_items;
+ struct ce_sendlist_item item[CE_SENDLIST_ITEMS_MAX];
+};
+
+/* Copy Engine settable attributes */
+struct ce_attr;
+
+/*==================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 ce_state *ce_state,
+ void *per_transfer_send_context,
+ u32 buffer,
+ unsigned int nbytes,
+ /* 14 bits */
+ unsigned int transfer_id,
+ unsigned int flags);
+
+void ath10k_ce_send_cb_register(struct ce_state *ce_state,
+ void (*send_cb) (struct ce_state *ce_state,
+ void *transfer_context,
+ u32 buffer,
+ unsigned int nbytes,
+ unsigned int transfer_id),
+ int disable_interrupts);
+
+/* Append a simple buffer (address/length) to a sendlist. */
+void ath10k_ce_sendlist_buf_add(struct ce_sendlist *sendlist,
+ u32 buffer,
+ unsigned int nbytes,
+ /* OR-ed with internal flags */
+ u32 flags);
+
+/*
+ * Queue a "sendlist" of buffers to be sent using gather to a single
+ * anonymous destination buffer
+ * ce - which copy engine to use
+ * sendlist - list of simple buffers to send using gather
+ * transfer_id - arbitrary ID; reflected to destination
+ * Returns 0 on success; otherwise an error status.
+ *
+ * Implemenation note: Pushes multiple buffers with Gather to Source ring.
+ */
+int ath10k_ce_sendlist_send(struct ce_state *ce_state,
+ void *per_transfer_send_context,
+ struct ce_sendlist *sendlist,
+ /* 14 bits */
+ unsigned int transfer_id);
+
+/*==================Recv=======================*/
+
+/*
+ * Make a buffer available to receive. The buffer must be at least of a
+ * minimal size appropriate for this copy engine (src_sz_max attribute).
+ * ce - which copy engine to use
+ * per_transfer_recv_context - context passed back to caller's recv_cb
+ * buffer - address of buffer in CE space
+ * Returns 0 on success; otherwise an error status.
+ *
+ * Implemenation note: Pushes a buffer to Dest ring.
+ */
+int ath10k_ce_recv_buf_enqueue(struct ce_state *ce_state,
+ void *per_transfer_recv_context,
+ u32 buffer);
+
+void ath10k_ce_recv_cb_register(struct ce_state *ce_state,
+ void (*recv_cb) (struct ce_state *ce_state,
+ void *transfer_context,
+ u32 buffer,
+ unsigned int nbytes,
+ unsigned int transfer_id,
+ unsigned int flags));
+
+/* 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 ce_state *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp,
+ unsigned int *flagsp);
+/*
+ * Supply data for the next completed unprocessed send descriptor.
+ * Pops 1 completed send buffer from Source ring.
+ */
+int ath10k_ce_completed_send_next(struct ce_state *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp);
+
+/*==================CE Engine Initialization=======================*/
+
+/* Initialize an instance of a CE */
+struct ce_state *ath10k_ce_init(struct ath10k *ar,
+ unsigned int ce_id,
+ const struct ce_attr *attr);
+
+/*==================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 ce_state *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp);
+
+/*
+ * 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 ce_state *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp);
+
+void ath10k_ce_deinit(struct ce_state *ce_state);
+
+/*==================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_interrupts(struct ath10k *ar);
+
+/* ce_attr.flags values */
+/* Use NonSnooping PCIe accesses? */
+#define CE_ATTR_NO_SNOOP 1
+
+/* Byte swap data words */
+#define CE_ATTR_BYTE_SWAP_DATA 2
+
+/* Swizzle descriptors? */
+#define CE_ATTR_SWIZZLE_DESCRIPTORS 4
+
+/* no interrupt on copy completion */
+#define CE_ATTR_DIS_INTR 8
+
+/* Attributes of an instance of a Copy Engine */
+struct ce_attr {
+ /* CE_ATTR_* values */
+ unsigned int flags;
+
+ /* currently not in use */
+ unsigned int priority;
+
+ /* #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;
+
+ /* Future use */
+ void *reserved;
+};
+
+/*
+ * When using sendlist_send to transfer multiple buffer fragments, the
+ * transfer context of each fragment, except last one, will be filled
+ * with CE_SENDLIST_ITEM_CTXT. ce_completed_send will return success for
+ * each fragment done with send and the transfer context would be
+ * CE_SENDLIST_ITEM_CTXT. Upper layer could use this to identify the
+ * status of a send completion.
+ */
+#define CE_SENDLIST_ITEM_CTXT ((void *)0xcecebeef)
+
+#define SR_BA_ADDRESS 0x0000
+#define SR_SIZE_ADDRESS 0x0004
+#define DR_BA_ADDRESS 0x0008
+#define DR_SIZE_ADDRESS 0x000c
+#define CE_CMD_ADDRESS 0x0018
+
+#define CE_CTRL1_DST_RING_BYTE_SWAP_EN_MSB 17
+#define CE_CTRL1_DST_RING_BYTE_SWAP_EN_LSB 17
+#define CE_CTRL1_DST_RING_BYTE_SWAP_EN_MASK 0x00020000
+#define CE_CTRL1_DST_RING_BYTE_SWAP_EN_SET(x) \
+ (((0 | (x)) << CE_CTRL1_DST_RING_BYTE_SWAP_EN_LSB) & \
+ CE_CTRL1_DST_RING_BYTE_SWAP_EN_MASK)
+
+#define CE_CTRL1_SRC_RING_BYTE_SWAP_EN_MSB 16
+#define CE_CTRL1_SRC_RING_BYTE_SWAP_EN_LSB 16
+#define CE_CTRL1_SRC_RING_BYTE_SWAP_EN_MASK 0x00010000
+#define CE_CTRL1_SRC_RING_BYTE_SWAP_EN_GET(x) \
+ (((x) & CE_CTRL1_SRC_RING_BYTE_SWAP_EN_MASK) >> \
+ CE_CTRL1_SRC_RING_BYTE_SWAP_EN_LSB)
+#define CE_CTRL1_SRC_RING_BYTE_SWAP_EN_SET(x) \
+ (((0 | (x)) << CE_CTRL1_SRC_RING_BYTE_SWAP_EN_LSB) & \
+ CE_CTRL1_SRC_RING_BYTE_SWAP_EN_MASK)
+
+#define CE_CTRL1_DMAX_LENGTH_MSB 15
+#define CE_CTRL1_DMAX_LENGTH_LSB 0
+#define CE_CTRL1_DMAX_LENGTH_MASK 0x0000ffff
+#define CE_CTRL1_DMAX_LENGTH_GET(x) \
+ (((x) & CE_CTRL1_DMAX_LENGTH_MASK) >> CE_CTRL1_DMAX_LENGTH_LSB)
+#define CE_CTRL1_DMAX_LENGTH_SET(x) \
+ (((0 | (x)) << CE_CTRL1_DMAX_LENGTH_LSB) & CE_CTRL1_DMAX_LENGTH_MASK)
+
+#define CE_CTRL1_ADDRESS 0x0010
+#define CE_CTRL1_HW_MASK 0x0007ffff
+#define CE_CTRL1_SW_MASK 0x0007ffff
+#define CE_CTRL1_HW_WRITE_MASK 0x00000000
+#define CE_CTRL1_SW_WRITE_MASK 0x0007ffff
+#define CE_CTRL1_RSTMASK 0xffffffff
+#define CE_CTRL1_RESET 0x00000080
+
+#define CE_CMD_HALT_STATUS_MSB 3
+#define CE_CMD_HALT_STATUS_LSB 3
+#define CE_CMD_HALT_STATUS_MASK 0x00000008
+#define CE_CMD_HALT_STATUS_GET(x) \
+ (((x) & CE_CMD_HALT_STATUS_MASK) >> CE_CMD_HALT_STATUS_LSB)
+#define CE_CMD_HALT_STATUS_SET(x) \
+ (((0 | (x)) << CE_CMD_HALT_STATUS_LSB) & CE_CMD_HALT_STATUS_MASK)
+#define CE_CMD_HALT_STATUS_RESET 0
+#define CE_CMD_HALT_MSB 0
+#define CE_CMD_HALT_MASK 0x00000001
+
+#define HOST_IE_COPY_COMPLETE_MSB 0
+#define HOST_IE_COPY_COMPLETE_LSB 0
+#define HOST_IE_COPY_COMPLETE_MASK 0x00000001
+#define HOST_IE_COPY_COMPLETE_GET(x) \
+ (((x) & HOST_IE_COPY_COMPLETE_MASK) >> HOST_IE_COPY_COMPLETE_LSB)
+#define HOST_IE_COPY_COMPLETE_SET(x) \
+ (((0 | (x)) << HOST_IE_COPY_COMPLETE_LSB) & HOST_IE_COPY_COMPLETE_MASK)
+#define HOST_IE_COPY_COMPLETE_RESET 0
+#define HOST_IE_ADDRESS 0x002c
+
+#define HOST_IS_DST_RING_LOW_WATERMARK_MASK 0x00000010
+#define HOST_IS_DST_RING_HIGH_WATERMARK_MASK 0x00000008
+#define HOST_IS_SRC_RING_LOW_WATERMARK_MASK 0x00000004
+#define HOST_IS_SRC_RING_HIGH_WATERMARK_MASK 0x00000002
+#define HOST_IS_COPY_COMPLETE_MASK 0x00000001
+#define HOST_IS_ADDRESS 0x0030
+
+#define MISC_IE_ADDRESS 0x0034
+
+#define MISC_IS_AXI_ERR_MASK 0x00000400
+
+#define MISC_IS_DST_ADDR_ERR_MASK 0x00000200
+#define MISC_IS_SRC_LEN_ERR_MASK 0x00000100
+#define MISC_IS_DST_MAX_LEN_VIO_MASK 0x00000080
+#define MISC_IS_DST_RING_OVERFLOW_MASK 0x00000040
+#define MISC_IS_SRC_RING_OVERFLOW_MASK 0x00000020
+
+#define MISC_IS_ADDRESS 0x0038
+
+#define SR_WR_INDEX_ADDRESS 0x003c
+
+#define DST_WR_INDEX_ADDRESS 0x0040
+
+#define CURRENT_SRRI_ADDRESS 0x0044
+
+#define CURRENT_DRRI_ADDRESS 0x0048
+
+#define SRC_WATERMARK_LOW_MSB 31
+#define SRC_WATERMARK_LOW_LSB 16
+#define SRC_WATERMARK_LOW_MASK 0xffff0000
+#define SRC_WATERMARK_LOW_GET(x) \
+ (((x) & SRC_WATERMARK_LOW_MASK) >> SRC_WATERMARK_LOW_LSB)
+#define SRC_WATERMARK_LOW_SET(x) \
+ (((0 | (x)) << SRC_WATERMARK_LOW_LSB) & SRC_WATERMARK_LOW_MASK)
+#define SRC_WATERMARK_LOW_RESET 0
+#define SRC_WATERMARK_HIGH_MSB 15
+#define SRC_WATERMARK_HIGH_LSB 0
+#define SRC_WATERMARK_HIGH_MASK 0x0000ffff
+#define SRC_WATERMARK_HIGH_GET(x) \
+ (((x) & SRC_WATERMARK_HIGH_MASK) >> SRC_WATERMARK_HIGH_LSB)
+#define SRC_WATERMARK_HIGH_SET(x) \
+ (((0 | (x)) << SRC_WATERMARK_HIGH_LSB) & SRC_WATERMARK_HIGH_MASK)
+#define SRC_WATERMARK_HIGH_RESET 0
+#define SRC_WATERMARK_ADDRESS 0x004c
+
+#define DST_WATERMARK_LOW_LSB 16
+#define DST_WATERMARK_LOW_MASK 0xffff0000
+#define DST_WATERMARK_LOW_SET(x) \
+ (((0 | (x)) << DST_WATERMARK_LOW_LSB) & DST_WATERMARK_LOW_MASK)
+#define DST_WATERMARK_LOW_RESET 0
+#define DST_WATERMARK_HIGH_MSB 15
+#define DST_WATERMARK_HIGH_LSB 0
+#define DST_WATERMARK_HIGH_MASK 0x0000ffff
+#define DST_WATERMARK_HIGH_GET(x) \
+ (((x) & DST_WATERMARK_HIGH_MASK) >> DST_WATERMARK_HIGH_LSB)
+#define DST_WATERMARK_HIGH_SET(x) \
+ (((0 | (x)) << DST_WATERMARK_HIGH_LSB) & DST_WATERMARK_HIGH_MASK)
+#define DST_WATERMARK_HIGH_RESET 0
+#define DST_WATERMARK_ADDRESS 0x0050
+
+
+static inline u32 ath10k_ce_base_address(unsigned int ce_id)
+{
+ return CE0_BASE_ADDRESS + (CE1_BASE_ADDRESS - CE0_BASE_ADDRESS) * ce_id;
+}
+
+#define CE_WATERMARK_MASK (HOST_IS_SRC_RING_LOW_WATERMARK_MASK | \
+ HOST_IS_SRC_RING_HIGH_WATERMARK_MASK | \
+ HOST_IS_DST_RING_LOW_WATERMARK_MASK | \
+ HOST_IS_DST_RING_HIGH_WATERMARK_MASK)
+
+#define CE_ERROR_MASK (MISC_IS_AXI_ERR_MASK | \
+ MISC_IS_DST_ADDR_ERR_MASK | \
+ MISC_IS_SRC_LEN_ERR_MASK | \
+ MISC_IS_DST_MAX_LEN_VIO_MASK | \
+ MISC_IS_DST_RING_OVERFLOW_MASK | \
+ MISC_IS_SRC_RING_OVERFLOW_MASK)
+
+#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]))
+
+/* 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_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_LSB 8
+#define CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_MASK 0x0000ff00
+#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
+
+#define CE_INTERRUPT_SUMMARY(ar) \
+ CE_WRAPPER_INTERRUPT_SUMMARY_HOST_MSI_GET( \
+ ath10k_pci_read32((ar), CE_WRAPPER_BASE_ADDRESS + \
+ CE_WRAPPER_INTERRUPT_SUMMARY_ADDRESS))
+
+#endif /* _CE_H_ */
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> --- drivers/net/wireless/ath/ath10k/ce.h | 516 ++++++++++++++++++++++++++++++++++ 1 file changed, 516 insertions(+) create mode 100644 drivers/net/wireless/ath/ath10k/ce.h -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html