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iwlwifi: pcie: cleanup old transport code from gen2

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Cleanup code that is irrelevant for a000 devices.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Sara Sharon 2017-01-24 14:53:11 +02:00 committed by Luca Coelho
parent cfbeb59824
commit 066fd29a2f
3 changed files with 30 additions and 177 deletions
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4
drivers/net/wireless/intel/iwlwifi/pcie/internal.h
View File

@ -766,10 +766,6 @@ void iwl_pcie_synchronize_irqs(struct iwl_trans *trans);
bool iwl_trans_check_hw_rf_kill(struct iwl_trans *trans);
void iwl_pcie_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
int iwl_queue_space(const struct iwl_txq *q);
int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_txq *txq, u8 hdr_len,
struct iwl_cmd_meta *out_meta,
struct iwl_device_cmd *dev_cmd, u16 tb1_len);
/* transport gen 2 exported functions */
int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,

195
drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
View File

@ -98,88 +98,23 @@ static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans *trans,
static void iwl_pcie_gen2_txq_inc_wr_ptr(struct iwl_trans *trans,
struct iwl_txq *txq)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 reg = 0;
int txq_id = txq->id;
lockdep_assert_held(&txq->lock);
/*
* explicitly wake up the NIC if:
* 1. shadow registers aren't enabled
* 2. NIC is woken up for CMD regardless of shadow outside this function
* 3. there is a chance that the NIC is asleep
*/
if (!trans->cfg->base_params->shadow_reg_enable &&
txq_id != trans_pcie->cmd_queue &&
test_bit(STATUS_TPOWER_PMI, &trans->status)) {
/*
* wake up nic if it's powered down ...
* uCode will wake up, and interrupt us again, so next
* time we'll skip this part.
*/
reg = iwl_read32(trans, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO(trans,
"Tx queue %d requesting wakeup, GP1 = 0x%x\n",
txq_id, reg);
iwl_set_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
txq->need_update = true;
return;
}
}
IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq->id, txq->write_ptr);
/*
* if not in power-save mode, uCode will never sleep when we're
* trying to tx (during RFKILL, we're not trying to tx).
*/
IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq_id, txq->write_ptr);
if (!txq->block)
iwl_write32(trans, HBUS_TARG_WRPTR,
txq->write_ptr | (txq_id << 8));
txq->write_ptr | (txq->id << 8));
}
static inline u8 iwl_pcie_gen2_get_num_tbs(struct iwl_trans *trans, void *_tfd)
static u8 iwl_pcie_gen2_get_num_tbs(struct iwl_trans *trans,
struct iwl_tfh_tfd *tfd)
{
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd = _tfd;
return le16_to_cpu(tfd->num_tbs) & 0x1f;
} else {
struct iwl_tfd *tfd = _tfd;
return tfd->num_tbs & 0x1f;
}
}
static inline dma_addr_t iwl_pcie_gen2_tb_get_addr(struct iwl_trans *trans,
void *_tfd, u8 idx)
{
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd = _tfd;
struct iwl_tfh_tb *tb = &tfd->tbs[idx];
return (dma_addr_t)(le64_to_cpu(tb->addr));
} else {
struct iwl_tfd *tfd = _tfd;
struct iwl_tfd_tb *tb = &tfd->tbs[idx];
dma_addr_t addr = get_unaligned_le32(&tb->lo);
dma_addr_t hi_len;
if (sizeof(dma_addr_t) <= sizeof(u32))
return addr;
hi_len = le16_to_cpu(tb->hi_n_len) & 0xF;
/*
* shift by 16 twice to avoid warnings on 32-bit
* (where this code never runs anyway due to the
* if statement above)
*/
return addr | ((hi_len << 16) << 16);
}
return le16_to_cpu(tfd->num_tbs) & 0x1f;
}
static void iwl_pcie_gen2_tfd_unmap(struct iwl_trans *trans,
@ -188,45 +123,31 @@ static void iwl_pcie_gen2_tfd_unmap(struct iwl_trans *trans,
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int i, num_tbs;
void *tfd = iwl_pcie_get_tfd(trans_pcie, txq, index);
struct iwl_tfh_tfd *tfd = iwl_pcie_get_tfd(trans_pcie, txq, index);
/* Sanity check on number of chunks */
num_tbs = iwl_pcie_gen2_get_num_tbs(trans, tfd);
if (num_tbs >= trans_pcie->max_tbs) {
IWL_ERR(trans, "Too many chunks: %i\n", num_tbs);
/* @todo issue fatal error, it is quite serious situation */
return;
}
/* first TB is never freed - it's the bidirectional DMA data */
for (i = 1; i < num_tbs; i++) {
if (meta->tbs & BIT(i))
dma_unmap_page(trans->dev,
iwl_pcie_gen2_tb_get_addr(trans, tfd,
i),
iwl_pcie_gen2_tb_get_addr(trans, tfd,
i),
le64_to_cpu(tfd->tbs[i].addr),
le16_to_cpu(tfd->tbs[i].tb_len),
DMA_TO_DEVICE);
else
dma_unmap_single(trans->dev,
iwl_pcie_gen2_tb_get_addr(trans, tfd,
i),
iwl_pcie_gen2_tb_get_addr(trans, tfd,
i),
le64_to_cpu(tfd->tbs[i].addr),
le16_to_cpu(tfd->tbs[i].tb_len),
DMA_TO_DEVICE);
}
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
tfd_fh->num_tbs = 0;
} else {
struct iwl_tfd *tfd_fh = (void *)tfd;
tfd_fh->num_tbs = 0;
}
tfd->num_tbs = 0;
}
static void iwl_pcie_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq)
@ -264,27 +185,13 @@ static void iwl_pcie_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq)
static inline void iwl_pcie_gen2_set_tb(struct iwl_trans *trans, void *tfd,
u8 idx, dma_addr_t addr, u16 len)
{
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx];
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx];
put_unaligned_le64(addr, &tb->addr);
tb->tb_len = cpu_to_le16(len);
put_unaligned_le64(addr, &tb->addr);
tb->tb_len = cpu_to_le16(len);
tfd_fh->num_tbs = cpu_to_le16(idx + 1);
} else {
struct iwl_tfd *tfd_fh = (void *)tfd;
struct iwl_tfd_tb *tb = &tfd_fh->tbs[idx];
u16 hi_n_len = len << 4;
put_unaligned_le32(addr, &tb->lo);
hi_n_len |= iwl_get_dma_hi_addr(addr);
tb->hi_n_len = cpu_to_le16(hi_n_len);
tfd_fh->num_tbs = idx + 1;
}
tfd_fh->num_tbs = cpu_to_le16(idx + 1);
}
int iwl_pcie_gen2_build_tfd(struct iwl_trans *trans, struct iwl_txq *txq,
@ -391,11 +298,9 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
void *tb1_addr;
void *tfd;
u16 len, tb1_len;
bool wait_write_ptr;
__le16 fc;
u8 hdr_len;
u16 wifi_seq;
bool amsdu;
txq = &trans_pcie->txq[txq_id];
@ -403,21 +308,6 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
"TX on unused queue %d\n", txq_id))
return -EINVAL;
if (unlikely(trans_pcie->sw_csum_tx &&
skb->ip_summed == CHECKSUM_PARTIAL)) {
int offs = skb_checksum_start_offset(skb);
int csum_offs = offs + skb->csum_offset;
__wsum csum;
if (skb_ensure_writable(skb, csum_offs + sizeof(__sum16)))
return -1;
csum = skb_checksum(skb, offs, skb->len - offs, 0);
*(__sum16 *)(skb->data + csum_offs) = csum_fold(csum);
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
if (skb_is_nonlinear(skb) &&
skb_shinfo(skb)->nr_frags > IWL_PCIE_MAX_FRAGS(trans_pcie) &&
__skb_linearize(skb))
@ -432,24 +322,6 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
spin_lock(&txq->lock);
if (iwl_queue_space(txq) < txq->high_mark) {
iwl_stop_queue(trans, txq);
/* don't put the packet on the ring, if there is no room */
if (unlikely(iwl_queue_space(txq) < 3)) {
struct iwl_device_cmd **dev_cmd_ptr;
dev_cmd_ptr = (void *)((u8 *)skb->cb +
trans_pcie->dev_cmd_offs);
*dev_cmd_ptr = dev_cmd;
__skb_queue_tail(&txq->overflow_q, skb);
spin_unlock(&txq->lock);
return 0;
}
}
/* In AGG mode, the index in the ring must correspond to the WiFi
* sequence number. This is a HW requirements to help the SCD to parse
* the BA.
@ -488,18 +360,10 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
*/
len = sizeof(struct iwl_tx_cmd) + sizeof(struct iwl_cmd_header) +
hdr_len - IWL_FIRST_TB_SIZE;
/* do not align A-MSDU to dword as the subframe header aligns it */
amsdu = ieee80211_is_data_qos(fc) &&
(*ieee80211_get_qos_ctl(hdr) &
IEEE80211_QOS_CTL_A_MSDU_PRESENT);
if (trans_pcie->sw_csum_tx || !amsdu) {
tb1_len = ALIGN(len, 4);
/* Tell NIC about any 2-byte padding after MAC header */
if (tb1_len != len)
tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
} else {
tb1_len = len;
}
tb1_len = ALIGN(len, 4);
/* Tell NIC about any 2-byte padding after MAC header */
if (tb1_len != len)
tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
/*
* The first TB points to bi-directional DMA data, we'll
@ -517,15 +381,9 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
goto out_err;
iwl_pcie_gen2_build_tfd(trans, txq, tb1_phys, tb1_len, false);
if (amsdu) {
if (unlikely(iwl_fill_data_tbs_amsdu(trans, skb, txq, hdr_len,
out_meta, dev_cmd,
tb1_len)))
goto out_err;
} else if (unlikely(iwl_fill_data_tbs(trans, skb, txq, hdr_len,
out_meta, dev_cmd, tb1_len))) {
if (unlikely(iwl_fill_data_tbs(trans, skb, txq, hdr_len,
out_meta, dev_cmd, tb1_len)))
goto out_err;
}
/* building the A-MSDU might have changed this data, so memcpy it now */
memcpy(&txq->first_tb_bufs[txq->write_ptr], &dev_cmd->hdr,
@ -536,8 +394,6 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
iwl_pcie_gen2_update_byte_tbl(trans, txq, le16_to_cpu(tx_cmd->len),
iwl_pcie_gen2_get_num_tbs(trans, tfd));
wait_write_ptr = ieee80211_has_morefrags(fc);
/* start timer if queue currently empty */
if (txq->read_ptr == txq->write_ptr) {
if (txq->wd_timeout) {
@ -559,8 +415,9 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
/* Tell device the write index *just past* this latest filled TFD */
txq->write_ptr = iwl_queue_inc_wrap(txq->write_ptr);
if (!wait_write_ptr)
iwl_pcie_gen2_txq_inc_wr_ptr(trans, txq);
iwl_pcie_gen2_txq_inc_wr_ptr(trans, txq);
if (iwl_queue_space(txq) < txq->high_mark)
iwl_stop_queue(trans, txq);
/*
* At this point the frame is "transmitted" successfully
@ -586,7 +443,7 @@ void iwl_pcie_gen2_txq_unmap(struct iwl_trans *trans, int txq_id)
IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n",
txq_id, txq->read_ptr);
iwl_pcie_txq_free_tfd(trans, txq);
iwl_pcie_gen2_free_tfd(trans, txq);
txq->read_ptr = iwl_queue_inc_wrap(txq->read_ptr);
if (txq->read_ptr == txq->write_ptr) {

8
drivers/net/wireless/intel/iwlwifi/pcie/tx.c
View File

@ -2080,10 +2080,10 @@ static void iwl_compute_pseudo_hdr_csum(void *iph, struct tcphdr *tcph,
}
}
int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_txq *txq, u8 hdr_len,
struct iwl_cmd_meta *out_meta,
struct iwl_device_cmd *dev_cmd, u16 tb1_len)
static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_txq *txq, u8 hdr_len,
struct iwl_cmd_meta *out_meta,
struct iwl_device_cmd *dev_cmd, u16 tb1_len)
{
struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
struct iwl_trans_pcie *trans_pcie = txq->trans_pcie;