static void ixgbe_clean_xdp_tx_buffer(struct ixgbe_ring *tx_ring,
struct ixgbe_tx_buffer *tx_bi)
{
xdp_return_frame(tx_bi->xdpf);
dma_unmap_single(tx_ring->dev,
dma_unmap_addr(tx_bi, dma),
dma_unmap_len(tx_bi, len), DMA_TO_DEVICE);
dma_unmap_len_set(tx_bi, len, 0);
}
/**
* arc_emac_tx - Starts the data transmission.
* @skb: sk_buff pointer that contains data to be Transmitted.
* @ndev: Pointer to net_device structure.
*
* returns: NETDEV_TX_OK, on success
* NETDEV_TX_BUSY, if any of the descriptors are not free.
*
* This function is invoked from upper layers to initiate transmission.
*/
static int arc_emac_tx(struct sk_buff *skb, struct net_device *ndev)
{
struct arc_emac_priv *priv = netdev_priv(ndev);
unsigned int len, *txbd_curr = &priv->txbd_curr;
struct net_device_stats *stats = &priv->stats;
__le32 *info = &priv->txbd[*txbd_curr].info;
dma_addr_t addr;
if (skb_padto(skb, ETH_ZLEN))
return NETDEV_TX_OK;
len = max_t(unsigned int, ETH_ZLEN, skb->len);
/* EMAC still holds this buffer in its possession.
* CPU must not modify this buffer descriptor
*/
if (unlikely((le32_to_cpu(*info) & OWN_MASK) == FOR_EMAC)) {
netif_stop_queue(ndev);
return NETDEV_TX_BUSY;
}
addr = dma_map_single(&ndev->dev, (void *)skb->data, len,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(&ndev->dev, addr))) {
stats->tx_dropped++;
stats->tx_errors++;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
dma_unmap_addr_set(&priv->tx_buff[*txbd_curr], addr, addr);
dma_unmap_len_set(&priv->tx_buff[*txbd_curr], len, len);
priv->tx_buff[*txbd_curr].skb = skb;
priv->txbd[*txbd_curr].data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();
skb_tx_timestamp(skb);
*info = cpu_to_le32(FOR_EMAC | FIRST_OR_LAST_MASK | len);
/* Increment index to point to the next BD */
*txbd_curr = (*txbd_curr + 1) % TX_BD_NUM;
/* Get "info" of the next BD */
info = &priv->txbd[*txbd_curr].info;
/* Check if if Tx BD ring is full - next BD is still owned by EMAC */
if (unlikely((le32_to_cpu(*info) & OWN_MASK) == FOR_EMAC))
netif_stop_queue(ndev);
arc_reg_set(priv, R_STATUS, TXPL_MASK);
return NETDEV_TX_OK;
}
void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *ring,
struct fm10k_tx_buffer *tx_buffer)
{
if (tx_buffer->skb) {
dev_kfree_skb_any(tx_buffer->skb);
if (dma_unmap_len(tx_buffer, len))
dma_unmap_single(ring->dev,
dma_unmap_addr(tx_buffer, dma),
dma_unmap_len(tx_buffer, len),
DMA_TO_DEVICE);
} else if (dma_unmap_len(tx_buffer, len)) {
dma_unmap_page(ring->dev,
dma_unmap_addr(tx_buffer, dma),
dma_unmap_len(tx_buffer, len),
DMA_TO_DEVICE);
}
tx_buffer->next_to_watch = NULL;
tx_buffer->skb = NULL;
dma_unmap_len_set(tx_buffer, len, 0);
/* tx_buffer must be completely set up in the transmit path */
}
/**
* arc_emac_open - Open the network device.
* @ndev: Pointer to the network device.
*
* returns: 0, on success or non-zero error value on failure.
*
* This function sets the MAC address, requests and enables an IRQ
* for the EMAC device and starts the Tx queue.
* It also connects to the phy device.
*/
static int arc_emac_open(struct net_device *ndev)
{
struct arc_emac_priv *priv = netdev_priv(ndev);
struct phy_device *phy_dev = ndev->phydev;
int i;
phy_dev->autoneg = AUTONEG_ENABLE;
phy_dev->speed = 0;
phy_dev->duplex = 0;
linkmode_and(phy_dev->advertising, phy_dev->advertising,
phy_dev->supported);
priv->last_rx_bd = 0;
/* Allocate and set buffers for Rx BD's */
for (i = 0; i < RX_BD_NUM; i++) {
dma_addr_t addr;
unsigned int *last_rx_bd = &priv->last_rx_bd;
struct arc_emac_bd *rxbd = &priv->rxbd[*last_rx_bd];
struct buffer_state *rx_buff = &priv->rx_buff[*last_rx_bd];
rx_buff->skb = netdev_alloc_skb_ip_align(ndev,
EMAC_BUFFER_SIZE);
if (unlikely(!rx_buff->skb))
return -ENOMEM;
addr = dma_map_single(&ndev->dev, (void *)rx_buff->skb->data,
EMAC_BUFFER_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, addr)) {
netdev_err(ndev, "cannot dma map\n");
dev_kfree_skb(rx_buff->skb);
return -ENOMEM;
}
dma_unmap_addr_set(rx_buff, addr, addr);
dma_unmap_len_set(rx_buff, len, EMAC_BUFFER_SIZE);
rxbd->data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;
}
priv->txbd_curr = 0;
priv->txbd_dirty = 0;
/* Clean Tx BD's */
memset(priv->txbd, 0, TX_RING_SZ);
/* Initialize logical address filter */
arc_reg_set(priv, R_LAFL, 0);
arc_reg_set(priv, R_LAFH, 0);
/* Set BD ring pointers for device side */
arc_reg_set(priv, R_RX_RING, (unsigned int)priv->rxbd_dma);
arc_reg_set(priv, R_TX_RING, (unsigned int)priv->txbd_dma);
/* Enable interrupts */
arc_reg_set(priv, R_ENABLE, RXINT_MASK | TXINT_MASK | ERR_MASK);
/* Set CONTROL */
arc_reg_set(priv, R_CTRL,
(RX_BD_NUM << 24) | /* RX BD table length */
(TX_BD_NUM << 16) | /* TX BD table length */
TXRN_MASK | RXRN_MASK);
napi_enable(&priv->napi);
/* Enable EMAC */
arc_reg_or(priv, R_CTRL, EN_MASK);
phy_start(ndev->phydev);
netif_start_queue(ndev);
return 0;
}
/**
* arc_emac_rx - processing of Rx packets.
* @ndev: Pointer to the network device.
* @budget: How many BDs to process on 1 call.
*
* returns: Number of processed BDs
*
* Iterate through Rx BDs and deliver received packages to upper layer.
*/
static int arc_emac_rx(struct net_device *ndev, int budget)
{
struct arc_emac_priv *priv = netdev_priv(ndev);
unsigned int work_done;
for (work_done = 0; work_done < budget; work_done++) {
unsigned int *last_rx_bd = &priv->last_rx_bd;
struct net_device_stats *stats = &ndev->stats;
struct buffer_state *rx_buff = &priv->rx_buff[*last_rx_bd];
struct arc_emac_bd *rxbd = &priv->rxbd[*last_rx_bd];
unsigned int pktlen, info = le32_to_cpu(rxbd->info);
struct sk_buff *skb;
dma_addr_t addr;
if (unlikely((info & OWN_MASK) == FOR_EMAC))
break;
/* Make a note that we saw a packet at this BD.
* So next time, driver starts from this + 1
*/
*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;
if (unlikely((info & FIRST_OR_LAST_MASK) !=
FIRST_OR_LAST_MASK)) {
/* We pre-allocate buffers of MTU size so incoming
* packets won't be split/chained.
*/
if (net_ratelimit())
netdev_err(ndev, "incomplete packet received\n");
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
stats->rx_errors++;
stats->rx_length_errors++;
continue;
}
/* Prepare the BD for next cycle. netif_receive_skb()
* only if new skb was allocated and mapped to avoid holes
* in the RX fifo.
*/
skb = netdev_alloc_skb_ip_align(ndev, EMAC_BUFFER_SIZE);
if (unlikely(!skb)) {
if (net_ratelimit())
netdev_err(ndev, "cannot allocate skb\n");
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
stats->rx_errors++;
stats->rx_dropped++;
continue;
}
addr = dma_map_single(&ndev->dev, (void *)skb->data,
EMAC_BUFFER_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, addr)) {
if (net_ratelimit())
netdev_err(ndev, "cannot map dma buffer\n");
dev_kfree_skb(skb);
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
stats->rx_errors++;
stats->rx_dropped++;
continue;
}
/* unmap previosly mapped skb */
dma_unmap_single(&ndev->dev, dma_unmap_addr(rx_buff, addr),
dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE);
pktlen = info & LEN_MASK;
stats->rx_packets++;
stats->rx_bytes += pktlen;
skb_put(rx_buff->skb, pktlen);
rx_buff->skb->dev = ndev;
rx_buff->skb->protocol = eth_type_trans(rx_buff->skb, ndev);
netif_receive_skb(rx_buff->skb);
rx_buff->skb = skb;
dma_unmap_addr_set(rx_buff, addr, addr);
dma_unmap_len_set(rx_buff, len, EMAC_BUFFER_SIZE);
rxbd->data = cpu_to_le32(addr);
/* Make sure pointer to data buffer is set */
wmb();
/* Return ownership to EMAC */
rxbd->info = cpu_to_le32(FOR_EMAC | EMAC_BUFFER_SIZE);
}
return work_done;
}
/**
* iwl_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
* @cmd: a point to the ucode command structure
*
* The function returns < 0 values to indicate the operation is
* failed. On success, it turns the index (> 0) of command in the
* command queue.
*/
static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
struct iwl_queue *q = &txq->q;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
unsigned long flags;
u32 idx;
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
if (test_bit(STATUS_FW_ERROR, &priv->status)) {
IWL_WARN(priv, "fw recovery, no hcmd send\n");
return -EIO;
}
if ((priv->ucode_owner == IWL_OWNERSHIP_TM) &&
!(cmd->flags & CMD_ON_DEMAND)) {
IWL_DEBUG_HC(priv, "tm own the uCode, no regular hcmd send\n");
return -EIO;
}
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 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",
iwl_is_rfkill(priv) ? "RF" : "CT");
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");
is_ct_kill = iwl_check_for_ct_kill(priv);
if (!is_ct_kill) {
IWL_ERR(priv, "Restarting adapter due to queue full\n");
iwlagn_fw_error(priv, false);
}
return -ENOSPC;
}
idx = get_cmd_index(q, q->write_ptr);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
if (cmd->flags & CMD_ASYNC)
out_meta->callback = cmd->callback;
/* 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));
/* 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];
}
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 = dma_map_single(priv->bus->dev, &out_cmd->hdr, copy_size,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(priv->bus->dev, phys_addr))) {
idx = -ENOMEM;
goto out;
}
dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, copy_size);
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
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 = dma_map_single(priv->bus->dev, (void *)cmd->data[i],
cmd->len[i], DMA_BIDIRECTIONAL);
if (dma_mapping_error(priv->bus->dev, phys_addr)) {
iwlagn_unmap_tfd(priv, out_meta,
&txq->tfds[q->write_ptr],
DMA_BIDIRECTIONAL);
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;
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;
}
/**
* iwl_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
* @cmd: a point to the ucode command structure
*
* The function returns < 0 values to indicate the operation is
* failed. On success, it turns the index (> 0) of command in the
* command queue.
*/
static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_tx_queue *txq = &trans_pcie->txq[trans_pcie->cmd_queue];
struct iwl_queue *q = &txq->q;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
u32 idx;
u16 copy_size, cmd_size;
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
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 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;
spin_lock_bh(&txq->lock);
if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
spin_unlock_bh(&txq->lock);
IWL_ERR(trans, "No space in command queue\n");
iwl_op_mode_cmd_queue_full(trans->op_mode);
return -ENOSPC;
}
idx = get_cmd_index(q, q->write_ptr);
out_cmd = txq->entries[idx].cmd;
out_meta = &txq->entries[idx].meta;
memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
/* 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(trans_pcie->cmd_queue) |
INDEX_TO_SEQ(q->write_ptr));
/* and copy the data that needs to be copied */
cmd_dest = out_cmd->payload;
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];
}
IWL_DEBUG_HC(trans,
"Sending command %s (#%x), seq: 0x%04X, %d bytes at %d[%d]:%d\n",
trans_pcie_get_cmd_string(trans_pcie, out_cmd->hdr.cmd),
out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
cmd_size, q->write_ptr, idx, trans_pcie->cmd_queue);
phys_addr = dma_map_single(trans->dev, &out_cmd->hdr, copy_size,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
idx = -ENOMEM;
goto out;
}
dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, copy_size);
iwlagn_txq_attach_buf_to_tfd(trans, 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
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 = dma_map_single(trans->dev, (void *)cmd->data[i],
cmd->len[i], DMA_BIDIRECTIONAL);
if (dma_mapping_error(trans->dev, phys_addr)) {
iwl_unmap_tfd(trans, out_meta,
&txq->tfds[q->write_ptr],
DMA_BIDIRECTIONAL);
idx = -ENOMEM;
goto out;
}
iwlagn_txq_attach_buf_to_tfd(trans, 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;
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(trans->dev, cmd->flags,
trace_bufs[0], trace_lens[0],
trace_bufs[1], trace_lens[1],
trace_bufs[2], trace_lens[2]);
#endif
/* start timer if queue currently empty */
if (q->read_ptr == q->write_ptr && trans_pcie->wd_timeout)
mod_timer(&txq->stuck_timer, jiffies + trans_pcie->wd_timeout);
/* 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(trans, txq);
out:
spin_unlock_bh(&txq->lock);
return idx;
}
/**
* iwl_legacy_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
* @cmd: a point to the ucode command structure
*
* The function returns < 0 values to indicate the operation is
* failed. On success, it turns the index (> 0) of command in the
* command queue.
*/
int iwl_legacy_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
struct iwl_queue *q = &txq->q;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
unsigned long flags;
int len;
u32 idx;
u16 fix_size;
cmd->len = priv->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
/* 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 (iwl_legacy_is_rfkill(priv) || iwl_legacy_is_ctkill(priv)) {
IWL_WARN(priv, "Not sending command - %s KILL\n",
iwl_legacy_is_rfkill(priv) ? "RF" : "CT");
return -EIO;
}
spin_lock_irqsave(&priv->hcmd_lock, flags);
if (iwl_legacy_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
spin_unlock_irqrestore(&priv->hcmd_lock, flags);
IWL_ERR(priv, "Restarting adapter due to command queue full\n");
queue_work(priv->workqueue, &priv->restart);
return -ENOSPC;
}
idx = iwl_legacy_get_cmd_index(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
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 | CMD_MAPPED;
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 */
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_LEGACY_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",
iwl_legacy_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",
iwl_legacy_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);
}
#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);
phys_addr = pci_map_single(priv->pci_dev, &out_cmd->hdr,
fix_size, PCI_DMA_BIDIRECTIONAL);
dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, fix_size);
trace_iwlwifi_legacy_dev_hcmd(priv, &out_cmd->hdr,
fix_size, cmd->flags);
priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
phys_addr, fix_size, 1,
U32_PAD(cmd->len));
/* Increment and update queue's write index */
q->write_ptr = iwl_legacy_queue_inc_wrap(q->write_ptr, q->n_bd);
iwl_legacy_txq_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->hcmd_lock, flags);
return idx;
}
/**
* iwl_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
* @cmd: a point to the ucode command structure
*
* The function returns < 0 values to indicate the operation is
* failed. On success, it turns the index (> 0) of command in the
* command queue.
*/
static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_tx_queue *txq = &trans_pcie->txq[trans_pcie->cmd_queue];
struct iwl_queue *q = &txq->q;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
u32 idx;
u16 copy_size, cmd_size, dma_size;
bool had_nocopy = false;
int i;
u8 *cmd_dest;
const u8 *cmddata[IWL_MAX_CMD_TFDS];
u16 cmdlen[IWL_MAX_CMD_TFDS];
#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
if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
IWL_WARN(trans, "fw recovery, no hcmd send\n");
return -EIO;
}
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++) {
cmddata[i] = cmd->data[i];
cmdlen[i] = cmd->len[i];
if (!cmd->len[i])
continue;
/* need at least IWL_HCMD_MIN_COPY_SIZE copied */
if (copy_size < IWL_HCMD_MIN_COPY_SIZE) {
int copy = IWL_HCMD_MIN_COPY_SIZE - copy_size;
if (copy > cmdlen[i])
copy = cmdlen[i];
cmdlen[i] -= copy;
cmddata[i] += copy;
copy_size += copy;
}
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 += cmdlen[i];
}
cmd_size += cmd->len[i];
}
/*
* 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;
spin_lock_bh(&txq->lock);
if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
spin_unlock_bh(&txq->lock);
IWL_ERR(trans, "No space in command queue\n");
iwl_op_mode_cmd_queue_full(trans->op_mode);
return -ENOSPC;
}
idx = get_cmd_index(q, q->write_ptr);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
/* 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(trans_pcie->cmd_queue) |
INDEX_TO_SEQ(q->write_ptr));
/* and copy the data that needs to be copied */
cmd_dest = out_cmd->payload;
copy_size = sizeof(out_cmd->hdr);
for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
int copy = 0;
if (!cmd->len)
continue;
/* need at least IWL_HCMD_MIN_COPY_SIZE copied */
if (copy_size < IWL_HCMD_MIN_COPY_SIZE) {
copy = IWL_HCMD_MIN_COPY_SIZE - copy_size;
if (copy > cmd->len[i])
copy = cmd->len[i];
}
/* copy everything if not nocopy/dup */
if (!(cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY))
copy = cmd->len[i];
if (copy) {
memcpy(cmd_dest, cmd->data[i], copy);
cmd_dest += copy;
copy_size += copy;
}
}
IWL_DEBUG_HC(trans, "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, trans_pcie->cmd_queue);
/*
* If the entire command is smaller than IWL_HCMD_MIN_COPY_SIZE, we must
* still map at least that many bytes for the hardware to write back to.
* We have enough space, so that's not a problem.
*/
dma_size = max_t(u16, copy_size, IWL_HCMD_MIN_COPY_SIZE);
phys_addr = dma_map_single(trans->dev, &out_cmd->hdr, dma_size,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
idx = -ENOMEM;
goto out;
}
dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, dma_size);
iwlagn_txq_attach_buf_to_tfd(trans, 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
/* map the remaining (adjusted) nocopy/dup fragments */
for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
if (!cmdlen[i])
continue;
if (!(cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY))
continue;
phys_addr = dma_map_single(trans->dev,
(void *)cmddata[i],
cmdlen[i], DMA_BIDIRECTIONAL);
if (dma_mapping_error(trans->dev, phys_addr)) {
iwlagn_unmap_tfd(trans, out_meta,
&txq->tfds[q->write_ptr],
DMA_BIDIRECTIONAL);
idx = -ENOMEM;
goto out;
}
iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr,
cmdlen[i], 0);
#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
trace_bufs[trace_idx] = cmddata[i];
trace_lens[trace_idx] = cmdlen[i];
trace_idx++;
#endif
}
out_meta->flags = cmd->flags;
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(trans->dev, 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(trans, txq);
out:
spin_unlock_bh(&txq->lock);
return idx;
}
static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_tx_queue *txq = &trans_pcie->txq[trans_pcie->cmd_queue];
struct iwl_queue *q = &txq->q;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
u32 idx;
u16 copy_size, cmd_size;
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
if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
IWL_WARN(trans, "fw recovery, no hcmd send\n");
return -EIO;
}
copy_size = sizeof(out_cmd->hdr);
cmd_size = sizeof(out_cmd->hdr);
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 {
if (WARN_ON(had_nocopy))
return -EINVAL;
copy_size += cmd->len[i];
}
cmd_size += cmd->len[i];
}
if (WARN_ON(copy_size > TFD_MAX_PAYLOAD_SIZE))
return -EINVAL;
spin_lock_bh(&txq->lock);
if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
spin_unlock_bh(&txq->lock);
IWL_ERR(trans, "No space in command queue\n");
iwl_op_mode_cmd_queue_full(trans->op_mode);
return -ENOSPC;
}
idx = get_cmd_index(q, q->write_ptr);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
memset(out_meta, 0, sizeof(*out_meta));
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
out_cmd->hdr.cmd = cmd->id;
out_cmd->hdr.flags = 0;
out_cmd->hdr.sequence =
cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) |
INDEX_TO_SEQ(q->write_ptr));
cmd_dest = out_cmd->payload;
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];
}
IWL_DEBUG_HC(trans, "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, trans_pcie->cmd_queue);
phys_addr = dma_map_single(trans->dev, &out_cmd->hdr, copy_size,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
idx = -ENOMEM;
goto out;
}
dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, copy_size);
iwlagn_txq_attach_buf_to_tfd(trans, 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
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 = dma_map_single(trans->dev,
(void *)cmd->data[i],
cmd->len[i], DMA_BIDIRECTIONAL);
if (dma_mapping_error(trans->dev, phys_addr)) {
iwlagn_unmap_tfd(trans, out_meta,
&txq->tfds[q->write_ptr],
DMA_BIDIRECTIONAL);
idx = -ENOMEM;
goto out;
}
iwlagn_txq_attach_buf_to_tfd(trans, 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;
txq->need_update = 1;
BUILD_BUG_ON(IWL_MAX_CMD_TFDS + 1 != 3);
#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
trace_iwlwifi_dev_hcmd(trans->dev, cmd->flags,
trace_bufs[0], trace_lens[0],
trace_bufs[1], trace_lens[1],
trace_bufs[2], trace_lens[2]);
#endif
q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
iwl_txq_update_write_ptr(trans, txq);
out:
spin_unlock_bh(&txq->lock);
return idx;
}