/******************************************************************************
*
- * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
#include <linux/slab.h>
#include <net/mac80211.h>
#include "iwl-eeprom.h"
+#include "iwl-agn.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-sta.h"
txq->need_update = 0;
}
+static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
+{
+ struct iwl_tfd_tb *tb = &tfd->tbs[idx];
+
+ dma_addr_t addr = get_unaligned_le32(&tb->lo);
+ if (sizeof(dma_addr_t) > sizeof(u32))
+ addr |=
+ ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
+
+ return addr;
+}
+
+static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
+{
+ struct iwl_tfd_tb *tb = &tfd->tbs[idx];
+
+ return le16_to_cpu(tb->hi_n_len) >> 4;
+}
+
+static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
+ dma_addr_t addr, u16 len)
+{
+ struct iwl_tfd_tb *tb = &tfd->tbs[idx];
+ u16 hi_n_len = len << 4;
+
+ put_unaligned_le32(addr, &tb->lo);
+ if (sizeof(dma_addr_t) > sizeof(u32))
+ hi_n_len |= ((addr >> 16) >> 16) & 0xF;
+
+ tb->hi_n_len = cpu_to_le16(hi_n_len);
+
+ tfd->num_tbs = idx + 1;
+}
+
+static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
+{
+ return tfd->num_tbs & 0x1f;
+}
+
+static void iwlagn_unmap_tfd(struct iwl_priv *priv, struct iwl_cmd_meta *meta,
+ struct iwl_tfd *tfd)
+{
+ struct pci_dev *dev = priv->pci_dev;
+ int i;
+ int num_tbs;
+
+ /* Sanity check on number of chunks */
+ num_tbs = iwl_tfd_get_num_tbs(tfd);
+
+ if (num_tbs >= IWL_NUM_OF_TBS) {
+ IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
+ /* @todo issue fatal error, it is quite serious situation */
+ return;
+ }
+
+ /* Unmap tx_cmd */
+ if (num_tbs)
+ pci_unmap_single(dev,
+ dma_unmap_addr(meta, mapping),
+ dma_unmap_len(meta, len),
+ PCI_DMA_BIDIRECTIONAL);
+
+ /* Unmap chunks, if any. */
+ for (i = 1; i < num_tbs; i++)
+ pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
+ iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
+}
+
+/**
+ * iwlagn_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
+ * @priv - driver private data
+ * @txq - tx queue
+ *
+ * Does NOT advance any TFD circular buffer read/write indexes
+ * Does NOT free the TFD itself (which is within circular buffer)
+ */
+void iwlagn_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
+{
+ struct iwl_tfd *tfd_tmp = txq->tfds;
+ int index = txq->q.read_ptr;
+
+ iwlagn_unmap_tfd(priv, &txq->meta[index], &tfd_tmp[index]);
+
+ /* free SKB */
+ if (txq->txb) {
+ struct sk_buff *skb;
+
+ skb = txq->txb[txq->q.read_ptr].skb;
+
+ /* can be called from irqs-disabled context */
+ if (skb) {
+ dev_kfree_skb_any(skb);
+ txq->txb[txq->q.read_ptr].skb = NULL;
+ }
+ }
+}
+
+int iwlagn_txq_attach_buf_to_tfd(struct iwl_priv *priv,
+ struct iwl_tx_queue *txq,
+ dma_addr_t addr, u16 len,
+ u8 reset)
+{
+ struct iwl_queue *q;
+ struct iwl_tfd *tfd, *tfd_tmp;
+ u32 num_tbs;
+
+ q = &txq->q;
+ tfd_tmp = txq->tfds;
+ tfd = &tfd_tmp[q->write_ptr];
+
+ if (reset)
+ memset(tfd, 0, sizeof(*tfd));
+
+ num_tbs = iwl_tfd_get_num_tbs(tfd);
+
+ /* Each TFD can point to a maximum 20 Tx buffers */
+ if (num_tbs >= IWL_NUM_OF_TBS) {
+ IWL_ERR(priv, "Error can not send more than %d chunks\n",
+ IWL_NUM_OF_TBS);
+ return -EINVAL;
+ }
+
+ if (WARN_ON(addr & ~DMA_BIT_MASK(36)))
+ return -EINVAL;
+
+ if (unlikely(addr & ~IWL_TX_DMA_MASK))
+ IWL_ERR(priv, "Unaligned address = %llx\n",
+ (unsigned long long)addr);
+
+ iwl_tfd_set_tb(tfd, num_tbs, addr, len);
+
+ return 0;
+}
+
+/*
+ * Tell nic where to find circular buffer of Tx Frame Descriptors for
+ * given Tx queue, and enable the DMA channel used for that queue.
+ *
+ * supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
+ * channels supported in hardware.
+ */
+static int iwlagn_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
+{
+ int txq_id = txq->q.id;
+
+ /* Circular buffer (TFD queue in DRAM) physical base address */
+ iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
+ txq->q.dma_addr >> 8);
+
+ return 0;
+}
+
/**
* iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
*/
return;
while (q->write_ptr != q->read_ptr) {
- priv->cfg->ops->lib->txq_free_tfd(priv, txq);
+ iwlagn_txq_free_tfd(priv, txq);
q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
}
}
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
struct iwl_queue *q = &txq->q;
int i;
- bool huge = false;
if (q->n_bd == 0)
return;
while (q->read_ptr != q->write_ptr) {
- /* we have no way to tell if it is a huge cmd ATM */
- i = get_cmd_index(q, q->read_ptr, 0);
+ i = get_cmd_index(q, q->read_ptr);
- if (txq->meta[i].flags & CMD_SIZE_HUGE)
- huge = true;
- else
+ if (txq->meta[i].flags & CMD_MAPPED) {
pci_unmap_single(priv->pci_dev,
dma_unmap_addr(&txq->meta[i], mapping),
dma_unmap_len(&txq->meta[i], len),
PCI_DMA_BIDIRECTIONAL);
+ txq->meta[i].flags = 0;
+ }
- q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
- }
-
- if (huge) {
- i = q->n_window;
- pci_unmap_single(priv->pci_dev,
- dma_unmap_addr(&txq->meta[i], mapping),
- dma_unmap_len(&txq->meta[i], len),
- PCI_DMA_BIDIRECTIONAL);
+ q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
}
}
iwl_cmd_queue_unmap(priv);
/* De-alloc array of command/tx buffers */
- for (i = 0; i <= TFD_CMD_SLOTS; i++)
+ for (i = 0; i < TFD_CMD_SLOTS; i++)
kfree(txq->cmd[i]);
/* De-alloc circular buffer of TFDs */
* reclaiming packets (on 'tx done IRQ), if free space become > high mark,
* Tx queue resumed.
*
- * See more detailed info in iwl-4965-hw.h.
***************************************************/
int iwl_queue_space(const struct iwl_queue *q)
/* count must be power-of-two size, otherwise iwl_queue_inc_wrap
* and iwl_queue_dec_wrap are broken. */
- BUG_ON(!is_power_of_2(count));
+ if (WARN_ON(!is_power_of_2(count)))
+ return -EINVAL;
/* slots_num must be power-of-two size, otherwise
* get_cmd_index is broken. */
- BUG_ON(!is_power_of_2(slots_num));
+ if (WARN_ON(!is_power_of_2(slots_num)))
+ return -EINVAL;
q->low_mark = q->n_window / 4;
if (q->low_mark < 4)
{
int i, len;
int ret;
- int actual_slots = slots_num;
- /*
- * Alloc buffer array for commands (Tx or other types of commands).
- * For the command queue (#4/#9), allocate command space + one big
- * command for scan, since scan command is very huge; the system will
- * not have two scans at the same time, so only one is needed.
- * For normal Tx queues (all other queues), no super-size command
- * space is needed.
- */
- if (txq_id == priv->cmd_queue)
- actual_slots++;
-
- txq->meta = kzalloc(sizeof(struct iwl_cmd_meta) * actual_slots,
+ txq->meta = kzalloc(sizeof(struct iwl_cmd_meta) * slots_num,
GFP_KERNEL);
- txq->cmd = kzalloc(sizeof(struct iwl_device_cmd *) * actual_slots,
+ txq->cmd = kzalloc(sizeof(struct iwl_device_cmd *) * slots_num,
GFP_KERNEL);
if (!txq->meta || !txq->cmd)
goto out_free_arrays;
len = sizeof(struct iwl_device_cmd);
- for (i = 0; i < actual_slots; i++) {
- /* only happens for cmd queue */
- if (i == slots_num)
- len = IWL_MAX_CMD_SIZE;
-
+ for (i = 0; i < slots_num; i++) {
txq->cmd[i] = kmalloc(len, GFP_KERNEL);
if (!txq->cmd[i])
goto err;
BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
/* Initialize queue's high/low-water marks, and head/tail indexes */
- iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
+ ret = iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
+ if (ret)
+ return ret;
/* Tell device where to find queue */
- priv->cfg->ops->lib->txq_init(priv, txq);
+ iwlagn_tx_queue_init(priv, txq);
return 0;
err:
- for (i = 0; i < actual_slots; i++)
+ for (i = 0; i < slots_num; i++)
kfree(txq->cmd[i]);
out_free_arrays:
kfree(txq->meta);
iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
/* Tell device where to find queue */
- priv->cfg->ops->lib->txq_init(priv, txq);
+ iwlagn_tx_queue_init(priv, txq);
}
/*************** HOST COMMAND QUEUE FUNCTIONS *****/
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
unsigned long flags;
- int len;
u32 idx;
- u16 fix_size;
+ u16 copy_size, cmd_size;
bool is_ct_kill = false;
+ bool had_nocopy = false;
+ int i;
+ u8 *cmd_dest;
+#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
+ const void *trace_bufs[IWL_MAX_CMD_TFDS + 1] = {};
+ int trace_lens[IWL_MAX_CMD_TFDS + 1] = {};
+ int trace_idx;
+#endif
- cmd->len = priv->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
- fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
+ copy_size = sizeof(out_cmd->hdr);
+ cmd_size = sizeof(out_cmd->hdr);
+
+ /* need one for the header if the first is NOCOPY */
+ BUILD_BUG_ON(IWL_MAX_CMD_TFDS > IWL_NUM_OF_TBS - 1);
+
+ for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
+ if (!cmd->len[i])
+ continue;
+ if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY) {
+ had_nocopy = true;
+ } else {
+ /* NOCOPY must not be followed by normal! */
+ if (WARN_ON(had_nocopy))
+ return -EINVAL;
+ copy_size += cmd->len[i];
+ }
+ cmd_size += cmd->len[i];
+ }
- /* If any of the command structures end up being larger than
- * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
- * we will need to increase the size of the TFD entries
- * Also, check to see if command buffer should not exceed the size
- * of device_cmd and max_cmd_size. */
- BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
- !(cmd->flags & CMD_SIZE_HUGE));
- BUG_ON(fix_size > IWL_MAX_CMD_SIZE);
+ /*
+ * If any of the command structures end up being larger than
+ * the TFD_MAX_PAYLOAD_SIZE and they aren't dynamically
+ * allocated into separate TFDs, then we will need to
+ * increase the size of the buffers.
+ */
+ if (WARN_ON(copy_size > TFD_MAX_PAYLOAD_SIZE))
+ return -EINVAL;
if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
IWL_WARN(priv, "Not sending command - %s KILL\n",
return -EIO;
}
+ spin_lock_irqsave(&priv->hcmd_lock, flags);
+
if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+
IWL_ERR(priv, "No space in command queue\n");
- if (priv->cfg->ops->lib->tt_ops.ct_kill_check) {
- is_ct_kill =
- priv->cfg->ops->lib->tt_ops.ct_kill_check(priv);
- }
+ is_ct_kill = iwl_check_for_ct_kill(priv);
if (!is_ct_kill) {
IWL_ERR(priv, "Restarting adapter due to queue full\n");
- queue_work(priv->workqueue, &priv->restart);
+ iwlagn_fw_error(priv, false);
}
return -ENOSPC;
}
- spin_lock_irqsave(&priv->hcmd_lock, flags);
-
- /* If this is a huge cmd, mark the huge flag also on the meta.flags
- * of the _original_ cmd. This is used for DMA mapping clean up.
- */
- if (cmd->flags & CMD_SIZE_HUGE) {
- idx = get_cmd_index(q, q->write_ptr, 0);
- txq->meta[idx].flags = CMD_SIZE_HUGE;
- }
-
- idx = get_cmd_index(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
+ idx = get_cmd_index(q, q->write_ptr);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
+ if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+ return -ENOSPC;
+ }
+
memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
- out_meta->flags = cmd->flags;
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
if (cmd->flags & CMD_ASYNC)
out_meta->callback = cmd->callback;
- out_cmd->hdr.cmd = cmd->id;
- memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
-
- /* At this point, the out_cmd now has all of the incoming cmd
- * information */
+ /* set up the header */
+ out_cmd->hdr.cmd = cmd->id;
out_cmd->hdr.flags = 0;
out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(priv->cmd_queue) |
- INDEX_TO_SEQ(q->write_ptr));
- if (cmd->flags & CMD_SIZE_HUGE)
- out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
- len = sizeof(struct iwl_device_cmd);
- if (idx == TFD_CMD_SLOTS)
- len = IWL_MAX_CMD_SIZE;
-
-#ifdef CONFIG_IWLWIFI_DEBUG
- switch (out_cmd->hdr.cmd) {
- case REPLY_TX_LINK_QUALITY_CMD:
- case SENSITIVITY_CMD:
- IWL_DEBUG_HC_DUMP(priv, "Sending command %s (#%x), seq: 0x%04X, "
- "%d bytes at %d[%d]:%d\n",
- get_cmd_string(out_cmd->hdr.cmd),
- out_cmd->hdr.cmd,
- le16_to_cpu(out_cmd->hdr.sequence), fix_size,
- q->write_ptr, idx, priv->cmd_queue);
- break;
- default:
- IWL_DEBUG_HC(priv, "Sending command %s (#%x), seq: 0x%04X, "
- "%d bytes at %d[%d]:%d\n",
- get_cmd_string(out_cmd->hdr.cmd),
- out_cmd->hdr.cmd,
- le16_to_cpu(out_cmd->hdr.sequence), fix_size,
- q->write_ptr, idx, priv->cmd_queue);
+ INDEX_TO_SEQ(q->write_ptr));
+
+ /* and copy the data that needs to be copied */
+
+ cmd_dest = &out_cmd->cmd.payload[0];
+ for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
+ if (!cmd->len[i])
+ continue;
+ if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY)
+ break;
+ memcpy(cmd_dest, cmd->data[i], cmd->len[i]);
+ cmd_dest += cmd->len[i];
}
-#endif
- txq->need_update = 1;
- if (priv->cfg->ops->lib->txq_update_byte_cnt_tbl)
- /* Set up entry in queue's byte count circular buffer */
- priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
+ IWL_DEBUG_HC(priv, "Sending command %s (#%x), seq: 0x%04X, "
+ "%d bytes at %d[%d]:%d\n",
+ get_cmd_string(out_cmd->hdr.cmd),
+ out_cmd->hdr.cmd,
+ le16_to_cpu(out_cmd->hdr.sequence), cmd_size,
+ q->write_ptr, idx, priv->cmd_queue);
phys_addr = pci_map_single(priv->pci_dev, &out_cmd->hdr,
- fix_size, PCI_DMA_BIDIRECTIONAL);
+ copy_size, PCI_DMA_BIDIRECTIONAL);
+ if (unlikely(pci_dma_mapping_error(priv->pci_dev, phys_addr))) {
+ idx = -ENOMEM;
+ goto out;
+ }
+
dma_unmap_addr_set(out_meta, mapping, phys_addr);
- dma_unmap_len_set(out_meta, len, fix_size);
+ dma_unmap_len_set(out_meta, len, copy_size);
- trace_iwlwifi_dev_hcmd(priv, &out_cmd->hdr, fix_size, cmd->flags);
+ iwlagn_txq_attach_buf_to_tfd(priv, txq, phys_addr, copy_size, 1);
+#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
+ trace_bufs[0] = &out_cmd->hdr;
+ trace_lens[0] = copy_size;
+ trace_idx = 1;
+#endif
- priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
- phys_addr, fix_size, 1,
- U32_PAD(cmd->len));
+ for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
+ if (!cmd->len[i])
+ continue;
+ if (!(cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY))
+ continue;
+ phys_addr = pci_map_single(priv->pci_dev, (void *)cmd->data[i],
+ cmd->len[i], PCI_DMA_TODEVICE);
+ if (pci_dma_mapping_error(priv->pci_dev, phys_addr)) {
+ iwlagn_unmap_tfd(priv, out_meta,
+ &txq->tfds[q->write_ptr]);
+ idx = -ENOMEM;
+ goto out;
+ }
+
+ iwlagn_txq_attach_buf_to_tfd(priv, txq, phys_addr,
+ cmd->len[i], 0);
+#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
+ trace_bufs[trace_idx] = cmd->data[i];
+ trace_lens[trace_idx] = cmd->len[i];
+ trace_idx++;
+#endif
+ }
+
+ out_meta->flags = cmd->flags | CMD_MAPPED;
+
+ txq->need_update = 1;
+
+ /* check that tracing gets all possible blocks */
+ BUILD_BUG_ON(IWL_MAX_CMD_TFDS + 1 != 3);
+#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
+ trace_iwlwifi_dev_hcmd(priv, cmd->flags,
+ trace_bufs[0], trace_lens[0],
+ trace_bufs[1], trace_lens[1],
+ trace_bufs[2], trace_lens[2]);
+#endif
/* Increment and update queue's write index */
q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
iwl_txq_update_write_ptr(priv, txq);
+ out:
spin_unlock_irqrestore(&priv->hcmd_lock, flags);
return idx;
}
if (nfreed++ > 0) {
IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", idx,
q->write_ptr, q->read_ptr);
- queue_work(priv->workqueue, &priv->restart);
+ iwlagn_fw_error(priv, false);
}
}
int txq_id = SEQ_TO_QUEUE(sequence);
int index = SEQ_TO_INDEX(sequence);
int cmd_index;
- bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
struct iwl_device_cmd *cmd;
struct iwl_cmd_meta *meta;
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
+ unsigned long flags;
/* If a Tx command is being handled and it isn't in the actual
* command queue then there a command routing bug has been introduced
return;
}
- /* If this is a huge cmd, clear the huge flag on the meta.flags
- * of the _original_ cmd. So that iwl_cmd_queue_free won't unmap
- * the DMA buffer for the scan (huge) command.
- */
- if (huge) {
- cmd_index = get_cmd_index(&txq->q, index, 0);
- txq->meta[cmd_index].flags = 0;
- }
- cmd_index = get_cmd_index(&txq->q, index, huge);
+ cmd_index = get_cmd_index(&txq->q, index);
cmd = txq->cmd[cmd_index];
meta = &txq->meta[cmd_index];
- pci_unmap_single(priv->pci_dev,
- dma_unmap_addr(meta, mapping),
- dma_unmap_len(meta, len),
- PCI_DMA_BIDIRECTIONAL);
+ iwlagn_unmap_tfd(priv, meta, &txq->tfds[index]);
/* Input error checking is done when commands are added to queue. */
if (meta->flags & CMD_WANT_SKB) {
} else if (meta->callback)
meta->callback(priv, cmd, pkt);
+ spin_lock_irqsave(&priv->hcmd_lock, flags);
+
iwl_hcmd_queue_reclaim(priv, txq_id, index, cmd_index);
if (!(meta->flags & CMD_ASYNC)) {
get_cmd_string(cmd->hdr.cmd));
wake_up_interruptible(&priv->wait_command_queue);
}
+
+ /* Mark as unmapped */
meta->flags = 0;
+
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
}
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