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-rw-r--r--carl9170fw/carlfw/include/dma.h349
1 files changed, 349 insertions, 0 deletions
diff --git a/carl9170fw/carlfw/include/dma.h b/carl9170fw/carlfw/include/dma.h
new file mode 100644
index 0000000..8f3a9df
--- /dev/null
+++ b/carl9170fw/carlfw/include/dma.h
@@ -0,0 +1,349 @@
+/*
+ * carl9170 firmware - used by the ar9170 wireless device
+ *
+ * This module contains DMA descriptor related definitions.
+ *
+ * Copyright (c) 2000-2005 ZyDAS Technology Corporation
+ * Copyright (c) 2007-2009 Atheros Communications, Inc.
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __CARL9170FW_DMA_H
+#define __CARL9170FW_DMA_H
+
+#include "config.h"
+#include "types.h"
+#include "compiler.h"
+#include "hw.h"
+#include "ieee80211.h"
+#include "wlan.h"
+
+struct dma_desc {
+ volatile uint16_t status; /* Descriptor status */
+ volatile uint16_t ctrl; /* Descriptor control */
+ volatile uint16_t dataSize; /* Data size */
+ volatile uint16_t totalLen; /* Total length */
+ struct dma_desc *lastAddr; /* Last address of this chain */
+ union {
+ uint8_t *_dataAddr; /* Data buffer address */
+ void *dataAddr;
+ } __packed;
+ struct dma_desc *nextAddr; /* Next TD address */
+} __packed __aligned(4);
+
+/* Up, Dn, 5x Tx, retry, Rx, [USB Int], (CAB), FW */
+#define AR9170_TERMINATOR_NUMBER_B 10
+
+#define AR9170_TERMINATOR_NUMBER_INT 1
+
+#ifdef CONFIG_CARL9170FW_CAB_QUEUE
+#define AR9170_TERMINATOR_NUMBER_CAB CARL9170_INTF_NUM
+#else
+#define AR9170_TERMINATOR_NUMBER_CAB 0
+#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
+
+#define AR9170_TERMINATOR_NUMBER (AR9170_TERMINATOR_NUMBER_B + \
+ AR9170_TERMINATOR_NUMBER_INT + \
+ AR9170_TERMINATOR_NUMBER_CAB)
+
+#define AR9170_BLOCK_SIZE (256 + 64)
+
+#define AR9170_DESCRIPTOR_SIZE (sizeof(struct dma_desc))
+
+struct ar9170_tx_ba_frame {
+ struct ar9170_tx_hwdesc hdr;
+ struct ieee80211_ba ba;
+} __packed;
+
+struct carl9170_tx_ba_superframe {
+ struct carl9170_tx_superdesc s;
+ struct ar9170_tx_ba_frame f;
+} __packed;
+
+struct ar9170_tx_null_frame {
+ struct ar9170_tx_hwdesc hdr;
+ struct ieee80211_hdr null;
+} __packed;
+
+struct carl9170_tx_null_superframe {
+ struct carl9170_tx_superdesc s;
+ struct ar9170_tx_null_frame f;
+} __packed;
+
+#define CARL9170_BA_BUFFER_LEN (__roundup(sizeof(struct carl9170_tx_ba_superframe), 16))
+#define CARL9170_RSP_BUFFER_LEN AR9170_BLOCK_SIZE
+
+struct carl9170_sram_reserved {
+ union {
+ uint32_t buf[CARL9170_BA_BUFFER_LEN / sizeof(uint32_t)];
+ struct carl9170_tx_ba_superframe ba;
+ } ba;
+
+ union {
+ uint32_t buf[CARL9170_MAX_CMD_LEN / sizeof(uint32_t)];
+ struct carl9170_cmd cmd;
+
+#ifdef CONFIG_CARL9170FW_WOL
+ struct carl9170_tx_null_superframe null;
+#endif /* CONFIG_CARL9170FW_WOL */
+ } cmd;
+
+ union {
+ uint32_t buf[CARL9170_RSP_BUFFER_LEN / sizeof(uint32_t)];
+ struct carl9170_rsp rsp;
+ } rsp;
+
+ union {
+ uint32_t buf[CARL9170_INTF_NUM][AR9170_MAC_BCN_LENGTH_MAX / sizeof(uint32_t)];
+ } bcn;
+};
+
+/*
+ * Memory layout in RAM:
+ *
+ * 0x100000 +--
+ * | terminator descriptors (dma_desc)
+ * | - Up (to USB host)
+ * | - Down (from USB host)
+ * | - TX (5x, to wifi)
+ * | - AMPDU TX retry
+ * | - RX (from wifi)
+ * | - CAB Queue
+ * | - FW cmd & req descriptor
+ * | - BlockAck descriptor
+ * | total: AR9170_TERMINATOR_NUMBER
+ * +--
+ * | block descriptors (dma_desc)
+ * | (AR9170_BLOCK_NUMBER)
+ * AR9170_BLOCK_BUFFER_BASE +-- align to multiple of 64
+ * | block buffers (AR9170_BLOCK_SIZE each)
+ * | (AR9170_BLOCK_NUMBER)
+ * approx. 0x117c00 +--
+ * | BA buffer (128 bytes)
+ * +--
+ * | CMD buffer (128 bytes)
+ * | - used as NULLFRAME buffer (128 bytes) for WOL
+ * +--
+ * | RSP buffer (320 bytes)
+ * +--
+ * | BEACON buffer (256 bytes)
+ * +--
+ * | unaccounted space / padding
+ * +--
+ * 0x18000
+ */
+
+#define CARL9170_SRAM_RESERVED (sizeof(struct carl9170_sram_reserved))
+
+#define AR9170_FRAME_MEMORY_SIZE (AR9170_SRAM_SIZE - CARL9170_SRAM_RESERVED)
+
+#define BLOCK_ALIGNMENT 64
+
+#define NONBLOCK_DESCRIPTORS_SIZE \
+ (AR9170_DESCRIPTOR_SIZE * (AR9170_TERMINATOR_NUMBER))
+
+#define NONBLOCK_DESCRIPTORS_SIZE_ALIGNED \
+ (ALIGN(NONBLOCK_DESCRIPTORS_SIZE, BLOCK_ALIGNMENT))
+
+#define AR9170_BLOCK_NUMBER ((AR9170_FRAME_MEMORY_SIZE - NONBLOCK_DESCRIPTORS_SIZE_ALIGNED) / \
+ (AR9170_BLOCK_SIZE + AR9170_DESCRIPTOR_SIZE))
+
+struct ar9170_data_block {
+ uint8_t data[AR9170_BLOCK_SIZE];
+};
+
+struct ar9170_dma_memory {
+ struct dma_desc terminator[AR9170_TERMINATOR_NUMBER];
+ struct dma_desc block[AR9170_BLOCK_NUMBER];
+ struct ar9170_data_block data[AR9170_BLOCK_NUMBER] __aligned(BLOCK_ALIGNMENT);
+ struct carl9170_sram_reserved reserved __aligned(BLOCK_ALIGNMENT);
+};
+
+extern struct ar9170_dma_memory dma_mem;
+
+#define AR9170_DOWN_BLOCK_RATIO 2
+#define AR9170_RX_BLOCK_RATIO 1
+/* Tx 16*2 = 32 packets => 32*(5*320) */
+#define AR9170_TX_BLOCK_NUMBER (AR9170_BLOCK_NUMBER * AR9170_DOWN_BLOCK_RATIO / \
+ (AR9170_RX_BLOCK_RATIO + AR9170_DOWN_BLOCK_RATIO))
+#define AR9170_RX_BLOCK_NUMBER (AR9170_BLOCK_NUMBER - AR9170_TX_BLOCK_NUMBER)
+
+/* Error code */
+#define AR9170_ERR_FS_BIT 1
+#define AR9170_ERR_LS_BIT 2
+#define AR9170_ERR_OWN_BITS 3
+#define AR9170_ERR_DATA_SIZE 4
+#define AR9170_ERR_TOTAL_LEN 5
+#define AR9170_ERR_DATA 6
+#define AR9170_ERR_SEQ 7
+#define AR9170_ERR_LEN 8
+
+/* Status bits definitions */
+/* Own bits definitions */
+#define AR9170_OWN_BITS 0x3
+#define AR9170_OWN_BITS_S 0
+#define AR9170_OWN_BITS_SW 0x0
+#define AR9170_OWN_BITS_HW 0x1
+#define AR9170_OWN_BITS_SE 0x2
+
+/* Control bits definitions */
+#define AR9170_CTRL_TXFAIL 1
+#define AR9170_CTRL_BAFAIL 2
+#define AR9170_CTRL_FAIL (AR9170_CTRL_TXFAIL | AR9170_CTRL_BAFAIL)
+
+/* First segament bit */
+#define AR9170_CTRL_LS_BIT 0x100
+/* Last segament bit */
+#define AR9170_CTRL_FS_BIT 0x200
+
+struct dma_queue {
+ struct dma_desc *head;
+ struct dma_desc *terminator;
+};
+
+#define DESC_PAYLOAD(a) ((void *)a->dataAddr)
+#define DESC_PAYLOAD_OFF(a, offset) ((void *)((unsigned long)(a->_dataAddr) + offset))
+
+struct dma_desc *dma_unlink_head(struct dma_queue *queue);
+void dma_init_descriptors(void);
+void dma_reclaim(struct dma_queue *q, struct dma_desc *desc);
+void dma_put(struct dma_queue *q, struct dma_desc *desc);
+
+static inline __inline bool is_terminator(struct dma_queue *q, struct dma_desc *desc)
+{
+ return q->terminator == desc;
+}
+
+static inline __inline bool queue_empty(struct dma_queue *q)
+{
+ return q->head == q->terminator;
+}
+
+/*
+ * Get a completed packet with # descriptors. Return the first
+ * descriptor and pointer the head directly by lastAddr->nextAddr
+ */
+static inline __inline struct dma_desc *dma_dequeue_bits(struct dma_queue *q,
+ uint16_t bits)
+{
+ struct dma_desc *desc = NULL;
+
+ if ((q->head->status & AR9170_OWN_BITS) == bits)
+ desc = dma_unlink_head(q);
+
+ return desc;
+}
+
+static inline __inline struct dma_desc *dma_dequeue_not_bits(struct dma_queue *q,
+ uint16_t bits)
+{
+ struct dma_desc *desc = NULL;
+
+ /* AR9170_OWN_BITS_HW will be filtered out here too. */
+ if ((q->head->status & AR9170_OWN_BITS) != bits)
+ desc = dma_unlink_head(q);
+
+ return desc;
+}
+
+#define for_each_desc_bits(desc, queue, bits) \
+ while ((desc = dma_dequeue_bits(queue, bits)))
+
+#define for_each_desc_not_bits(desc, queue, bits) \
+ while ((desc = dma_dequeue_not_bits(queue, bits)))
+
+#define for_each_desc(desc, queue) \
+ while ((desc = dma_unlink_head(queue)))
+
+#define __for_each_desc_bits(desc, queue, bits) \
+ for (desc = (queue)->head; \
+ (desc != (queue)->terminator && \
+ (desc->status & AR9170_OWN_BITS) == bits); \
+ desc = desc->lastAddr->nextAddr)
+
+#define __while_desc_bits(desc, queue, bits) \
+ for (desc = (queue)->head; \
+ (!queue_empty(queue) && \
+ (desc->status & AR9170_OWN_BITS) == bits); \
+ desc = (queue)->head)
+
+#define __for_each_desc_continue(desc, queue) \
+ for (; desc != (queue)->terminator; \
+ desc = (desc)->lastAddr->nextAddr)
+
+#define __for_each_desc(desc, queue) \
+ for (desc = (queue)->head; \
+ desc != (queue)->terminator; \
+ desc = (desc)->lastAddr->nextAddr)
+
+#define __for_each_desc_safe(desc, tmp, queue) \
+ for (desc = (queue)->head, tmp = desc->lastAddr->nextAddr; \
+ desc != (queue)->terminator; \
+ desc = tmp, tmp = tmp->lastAddr->nextAddr)
+
+#define __while_subdesc(desc, queue) \
+ for (desc = (queue)->head; \
+ desc != (queue)->terminator; \
+ desc = (desc)->nextAddr)
+
+static inline __inline unsigned int queue_len(struct dma_queue *q)
+{
+ struct dma_desc *desc;
+ unsigned int i = 0;
+
+ __while_subdesc(desc, q)
+ i++;
+
+ return i;
+}
+
+/*
+ * rearm a completed packet, so it will be processed agian.
+ */
+static inline __inline void dma_rearm(struct dma_desc *desc)
+{
+ /* Set OWN bit to HW */
+ desc->status = ((desc->status & (~AR9170_OWN_BITS)) |
+ AR9170_OWN_BITS_HW);
+}
+
+static inline __inline void dma_fix_downqueue(struct dma_desc *desc)
+{
+ desc->status = AR9170_OWN_BITS_HW;
+ desc->ctrl = 0;
+ desc->dataSize = 0;
+ desc->totalLen = AR9170_BLOCK_SIZE;
+ desc->lastAddr = desc;
+}
+
+static inline void __check_desc(void)
+{
+ struct ar9170_dma_memory mem;
+ BUILD_BUG_ON(sizeof(struct ar9170_data_block) != AR9170_BLOCK_SIZE);
+ BUILD_BUG_ON(sizeof(struct dma_desc) != 20);
+
+ BUILD_BUG_ON(sizeof(mem) > AR9170_SRAM_SIZE);
+
+ BUILD_BUG_ON(offsetof(struct carl9170_sram_reserved, ba.buf) & (BLOCK_ALIGNMENT - 1));
+ BUILD_BUG_ON(offsetof(struct carl9170_sram_reserved, cmd.buf) & (BLOCK_ALIGNMENT - 1));
+ BUILD_BUG_ON(offsetof(struct carl9170_sram_reserved, rsp.buf) & (BLOCK_ALIGNMENT - 1));
+ BUILD_BUG_ON(offsetof(struct carl9170_sram_reserved, bcn.buf) & (BLOCK_ALIGNMENT - 1));
+ BUILD_BUG_ON(sizeof(struct carl9170_tx_null_superframe) > CARL9170_MAX_CMD_LEN);
+}
+
+#endif /* __CARL9170FW_DMA_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-23 08:26:16 +0000