mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1047 lines
28 KiB
1047 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* Copyright(c) 1999 - 2018 Intel Corporation. */ |
|
|
|
#include "ixgbe.h" |
|
#include <linux/if_ether.h> |
|
#include <linux/gfp.h> |
|
#include <linux/if_vlan.h> |
|
#include <generated/utsrelease.h> |
|
#include <scsi/scsi_cmnd.h> |
|
#include <scsi/scsi_device.h> |
|
#include <scsi/fc/fc_fs.h> |
|
#include <scsi/fc/fc_fcoe.h> |
|
#include <scsi/libfc.h> |
|
#include <scsi/libfcoe.h> |
|
|
|
/** |
|
* ixgbe_fcoe_clear_ddp - clear the given ddp context |
|
* @ddp: ptr to the ixgbe_fcoe_ddp |
|
* |
|
* Returns : none |
|
* |
|
*/ |
|
static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp) |
|
{ |
|
ddp->len = 0; |
|
ddp->err = 1; |
|
ddp->udl = NULL; |
|
ddp->udp = 0UL; |
|
ddp->sgl = NULL; |
|
ddp->sgc = 0; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_ddp_put - free the ddp context for a given xid |
|
* @netdev: the corresponding net_device |
|
* @xid: the xid that corresponding ddp will be freed |
|
* |
|
* This is the implementation of net_device_ops.ndo_fcoe_ddp_done |
|
* and it is expected to be called by ULD, i.e., FCP layer of libfc |
|
* to release the corresponding ddp context when the I/O is done. |
|
* |
|
* Returns : data length already ddp-ed in bytes |
|
*/ |
|
int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid) |
|
{ |
|
int len; |
|
struct ixgbe_fcoe *fcoe; |
|
struct ixgbe_adapter *adapter; |
|
struct ixgbe_fcoe_ddp *ddp; |
|
struct ixgbe_hw *hw; |
|
u32 fcbuff; |
|
|
|
if (!netdev) |
|
return 0; |
|
|
|
if (xid >= netdev->fcoe_ddp_xid) |
|
return 0; |
|
|
|
adapter = netdev_priv(netdev); |
|
fcoe = &adapter->fcoe; |
|
ddp = &fcoe->ddp[xid]; |
|
if (!ddp->udl) |
|
return 0; |
|
|
|
hw = &adapter->hw; |
|
len = ddp->len; |
|
/* if no error then skip ddp context invalidation */ |
|
if (!ddp->err) |
|
goto skip_ddpinv; |
|
|
|
if (hw->mac.type == ixgbe_mac_X550) { |
|
/* X550 does not require DDP FCoE lock */ |
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), |
|
(xid | IXGBE_FCFLTRW_WE)); |
|
|
|
/* program FCBUFF */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0); |
|
|
|
/* program FCDMARW */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), |
|
(xid | IXGBE_FCDMARW_WE)); |
|
|
|
/* read FCBUFF to check context invalidated */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), |
|
(xid | IXGBE_FCDMARW_RE)); |
|
fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid)); |
|
} else { |
|
/* other hardware requires DDP FCoE lock */ |
|
spin_lock_bh(&fcoe->lock); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCFLT, 0); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, |
|
(xid | IXGBE_FCFLTRW_WE)); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, 0); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, |
|
(xid | IXGBE_FCDMARW_WE)); |
|
|
|
/* guaranteed to be invalidated after 100us */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, |
|
(xid | IXGBE_FCDMARW_RE)); |
|
fcbuff = IXGBE_READ_REG(hw, IXGBE_FCBUFF); |
|
spin_unlock_bh(&fcoe->lock); |
|
} |
|
|
|
if (fcbuff & IXGBE_FCBUFF_VALID) |
|
usleep_range(100, 150); |
|
|
|
skip_ddpinv: |
|
if (ddp->sgl) |
|
dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc, |
|
DMA_FROM_DEVICE); |
|
if (ddp->pool) { |
|
dma_pool_free(ddp->pool, ddp->udl, ddp->udp); |
|
ddp->pool = NULL; |
|
} |
|
|
|
ixgbe_fcoe_clear_ddp(ddp); |
|
|
|
return len; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_ddp_setup - called to set up ddp context |
|
* @netdev: the corresponding net_device |
|
* @xid: the exchange id requesting ddp |
|
* @sgl: the scatter-gather list for this request |
|
* @sgc: the number of scatter-gather items |
|
* @target_mode: 1 to setup target mode, 0 to setup initiator mode |
|
* |
|
* Returns : 1 for success and 0 for no ddp |
|
*/ |
|
static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid, |
|
struct scatterlist *sgl, unsigned int sgc, |
|
int target_mode) |
|
{ |
|
struct ixgbe_adapter *adapter; |
|
struct ixgbe_hw *hw; |
|
struct ixgbe_fcoe *fcoe; |
|
struct ixgbe_fcoe_ddp *ddp; |
|
struct ixgbe_fcoe_ddp_pool *ddp_pool; |
|
struct scatterlist *sg; |
|
unsigned int i, j, dmacount; |
|
unsigned int len; |
|
static const unsigned int bufflen = IXGBE_FCBUFF_MIN; |
|
unsigned int firstoff = 0; |
|
unsigned int lastsize; |
|
unsigned int thisoff = 0; |
|
unsigned int thislen = 0; |
|
u32 fcbuff, fcdmarw, fcfltrw, fcrxctl; |
|
dma_addr_t addr = 0; |
|
|
|
if (!netdev || !sgl) |
|
return 0; |
|
|
|
adapter = netdev_priv(netdev); |
|
if (xid >= netdev->fcoe_ddp_xid) { |
|
e_warn(drv, "xid=0x%x out-of-range\n", xid); |
|
return 0; |
|
} |
|
|
|
/* no DDP if we are already down or resetting */ |
|
if (test_bit(__IXGBE_DOWN, &adapter->state) || |
|
test_bit(__IXGBE_RESETTING, &adapter->state)) |
|
return 0; |
|
|
|
fcoe = &adapter->fcoe; |
|
ddp = &fcoe->ddp[xid]; |
|
if (ddp->sgl) { |
|
e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n", |
|
xid, ddp->sgl, ddp->sgc); |
|
return 0; |
|
} |
|
ixgbe_fcoe_clear_ddp(ddp); |
|
|
|
|
|
if (!fcoe->ddp_pool) { |
|
e_warn(drv, "No ddp_pool resources allocated\n"); |
|
return 0; |
|
} |
|
|
|
ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu()); |
|
if (!ddp_pool->pool) { |
|
e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid); |
|
goto out_noddp; |
|
} |
|
|
|
/* setup dma from scsi command sgl */ |
|
dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); |
|
if (dmacount == 0) { |
|
e_err(drv, "xid 0x%x DMA map error\n", xid); |
|
goto out_noddp; |
|
} |
|
|
|
/* alloc the udl from per cpu ddp pool */ |
|
ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp); |
|
if (!ddp->udl) { |
|
e_err(drv, "failed allocated ddp context\n"); |
|
goto out_noddp_unmap; |
|
} |
|
ddp->pool = ddp_pool->pool; |
|
ddp->sgl = sgl; |
|
ddp->sgc = sgc; |
|
|
|
j = 0; |
|
for_each_sg(sgl, sg, dmacount, i) { |
|
addr = sg_dma_address(sg); |
|
len = sg_dma_len(sg); |
|
while (len) { |
|
/* max number of buffers allowed in one DDP context */ |
|
if (j >= IXGBE_BUFFCNT_MAX) { |
|
ddp_pool->noddp++; |
|
goto out_noddp_free; |
|
} |
|
|
|
/* get the offset of length of current buffer */ |
|
thisoff = addr & ((dma_addr_t)bufflen - 1); |
|
thislen = min((bufflen - thisoff), len); |
|
/* |
|
* all but the 1st buffer (j == 0) |
|
* must be aligned on bufflen |
|
*/ |
|
if ((j != 0) && (thisoff)) |
|
goto out_noddp_free; |
|
/* |
|
* all but the last buffer |
|
* ((i == (dmacount - 1)) && (thislen == len)) |
|
* must end at bufflen |
|
*/ |
|
if (((i != (dmacount - 1)) || (thislen != len)) |
|
&& ((thislen + thisoff) != bufflen)) |
|
goto out_noddp_free; |
|
|
|
ddp->udl[j] = (u64)(addr - thisoff); |
|
/* only the first buffer may have none-zero offset */ |
|
if (j == 0) |
|
firstoff = thisoff; |
|
len -= thislen; |
|
addr += thislen; |
|
j++; |
|
} |
|
} |
|
/* only the last buffer may have non-full bufflen */ |
|
lastsize = thisoff + thislen; |
|
|
|
/* |
|
* lastsize can not be buffer len. |
|
* If it is then adding another buffer with lastsize = 1. |
|
*/ |
|
if (lastsize == bufflen) { |
|
if (j >= IXGBE_BUFFCNT_MAX) { |
|
ddp_pool->noddp_ext_buff++; |
|
goto out_noddp_free; |
|
} |
|
|
|
ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma); |
|
j++; |
|
lastsize = 1; |
|
} |
|
put_cpu(); |
|
|
|
fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT); |
|
fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT); |
|
fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT); |
|
/* Set WRCONTX bit to allow DDP for target */ |
|
if (target_mode) |
|
fcbuff |= (IXGBE_FCBUFF_WRCONTX); |
|
fcbuff |= (IXGBE_FCBUFF_VALID); |
|
|
|
fcdmarw = xid; |
|
fcdmarw |= IXGBE_FCDMARW_WE; |
|
fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT); |
|
|
|
fcfltrw = xid; |
|
fcfltrw |= IXGBE_FCFLTRW_WE; |
|
|
|
/* program DMA context */ |
|
hw = &adapter->hw; |
|
|
|
/* turn on last frame indication for target mode as FCP_RSPtarget is |
|
* supposed to send FCP_RSP when it is done. */ |
|
if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) { |
|
set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode); |
|
fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL); |
|
fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH; |
|
IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl); |
|
} |
|
|
|
if (hw->mac.type == ixgbe_mac_X550) { |
|
/* X550 does not require DDP lock */ |
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid), |
|
ddp->udp & DMA_BIT_MASK(32)); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw); |
|
/* program filter context */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw); |
|
} else { |
|
/* DDP lock for indirect DDP context access */ |
|
spin_lock_bh(&fcoe->lock); |
|
|
|
IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32)); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw); |
|
/* program filter context */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID); |
|
IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw); |
|
|
|
spin_unlock_bh(&fcoe->lock); |
|
} |
|
|
|
return 1; |
|
|
|
out_noddp_free: |
|
dma_pool_free(ddp->pool, ddp->udl, ddp->udp); |
|
ixgbe_fcoe_clear_ddp(ddp); |
|
|
|
out_noddp_unmap: |
|
dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE); |
|
out_noddp: |
|
put_cpu(); |
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode |
|
* @netdev: the corresponding net_device |
|
* @xid: the exchange id requesting ddp |
|
* @sgl: the scatter-gather list for this request |
|
* @sgc: the number of scatter-gather items |
|
* |
|
* This is the implementation of net_device_ops.ndo_fcoe_ddp_setup |
|
* and is expected to be called from ULD, e.g., FCP layer of libfc |
|
* to set up ddp for the corresponding xid of the given sglist for |
|
* the corresponding I/O. |
|
* |
|
* Returns : 1 for success and 0 for no ddp |
|
*/ |
|
int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid, |
|
struct scatterlist *sgl, unsigned int sgc) |
|
{ |
|
return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0); |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_ddp_target - called to set up ddp context in target mode |
|
* @netdev: the corresponding net_device |
|
* @xid: the exchange id requesting ddp |
|
* @sgl: the scatter-gather list for this request |
|
* @sgc: the number of scatter-gather items |
|
* |
|
* This is the implementation of net_device_ops.ndo_fcoe_ddp_target |
|
* and is expected to be called from ULD, e.g., FCP layer of libfc |
|
* to set up ddp for the corresponding xid of the given sglist for |
|
* the corresponding I/O. The DDP in target mode is a write I/O request |
|
* from the initiator. |
|
* |
|
* Returns : 1 for success and 0 for no ddp |
|
*/ |
|
int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid, |
|
struct scatterlist *sgl, unsigned int sgc) |
|
{ |
|
return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1); |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_ddp - check ddp status and mark it done |
|
* @adapter: ixgbe adapter |
|
* @rx_desc: advanced rx descriptor |
|
* @skb: the skb holding the received data |
|
* |
|
* This checks ddp status. |
|
* |
|
* Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates |
|
* not passing the skb to ULD, > 0 indicates is the length of data |
|
* being ddped. |
|
*/ |
|
int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter, |
|
union ixgbe_adv_rx_desc *rx_desc, |
|
struct sk_buff *skb) |
|
{ |
|
int rc = -EINVAL; |
|
struct ixgbe_fcoe *fcoe; |
|
struct ixgbe_fcoe_ddp *ddp; |
|
struct fc_frame_header *fh; |
|
struct fcoe_crc_eof *crc; |
|
__le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR); |
|
__le32 ddp_err; |
|
int ddp_max; |
|
u32 fctl; |
|
u16 xid; |
|
|
|
if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC)) |
|
skb->ip_summed = CHECKSUM_NONE; |
|
else |
|
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
|
|
if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)) |
|
fh = (struct fc_frame_header *)(skb->data + |
|
sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr)); |
|
else |
|
fh = (struct fc_frame_header *)(skb->data + |
|
sizeof(struct fcoe_hdr)); |
|
|
|
fctl = ntoh24(fh->fh_f_ctl); |
|
if (fctl & FC_FC_EX_CTX) |
|
xid = be16_to_cpu(fh->fh_ox_id); |
|
else |
|
xid = be16_to_cpu(fh->fh_rx_id); |
|
|
|
ddp_max = IXGBE_FCOE_DDP_MAX; |
|
/* X550 has different DDP Max limit */ |
|
if (adapter->hw.mac.type == ixgbe_mac_X550) |
|
ddp_max = IXGBE_FCOE_DDP_MAX_X550; |
|
if (xid >= ddp_max) |
|
return -EINVAL; |
|
|
|
fcoe = &adapter->fcoe; |
|
ddp = &fcoe->ddp[xid]; |
|
if (!ddp->udl) |
|
return -EINVAL; |
|
|
|
ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE | |
|
IXGBE_RXDADV_ERR_FCERR); |
|
if (ddp_err) |
|
return -EINVAL; |
|
|
|
switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) { |
|
/* return 0 to bypass going to ULD for DDPed data */ |
|
case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP): |
|
/* update length of DDPed data */ |
|
ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); |
|
rc = 0; |
|
break; |
|
/* unmap the sg list when FCPRSP is received */ |
|
case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP): |
|
dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, |
|
ddp->sgc, DMA_FROM_DEVICE); |
|
ddp->err = (__force u32)ddp_err; |
|
ddp->sgl = NULL; |
|
ddp->sgc = 0; |
|
fallthrough; |
|
/* if DDP length is present pass it through to ULD */ |
|
case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP): |
|
/* update length of DDPed data */ |
|
ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); |
|
if (ddp->len) |
|
rc = ddp->len; |
|
break; |
|
/* no match will return as an error */ |
|
case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH): |
|
default: |
|
break; |
|
} |
|
|
|
/* In target mode, check the last data frame of the sequence. |
|
* For DDP in target mode, data is already DDPed but the header |
|
* indication of the last data frame ould allow is to tell if we |
|
* got all the data and the ULP can send FCP_RSP back, as this is |
|
* not a full fcoe frame, we fill the trailer here so it won't be |
|
* dropped by the ULP stack. |
|
*/ |
|
if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) && |
|
(fctl & FC_FC_END_SEQ)) { |
|
skb_linearize(skb); |
|
crc = skb_put(skb, sizeof(*crc)); |
|
crc->fcoe_eof = FC_EOF_T; |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
/** |
|
* ixgbe_fso - ixgbe FCoE Sequence Offload (FSO) |
|
* @tx_ring: tx desc ring |
|
* @first: first tx_buffer structure containing skb, tx_flags, and protocol |
|
* @hdr_len: hdr_len to be returned |
|
* |
|
* This sets up large send offload for FCoE |
|
* |
|
* Returns : 0 indicates success, < 0 for error |
|
*/ |
|
int ixgbe_fso(struct ixgbe_ring *tx_ring, |
|
struct ixgbe_tx_buffer *first, |
|
u8 *hdr_len) |
|
{ |
|
struct sk_buff *skb = first->skb; |
|
struct fc_frame_header *fh; |
|
u32 vlan_macip_lens; |
|
u32 fcoe_sof_eof = 0; |
|
u32 mss_l4len_idx; |
|
u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE; |
|
u8 sof, eof; |
|
|
|
if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) { |
|
dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n", |
|
skb_shinfo(skb)->gso_type); |
|
return -EINVAL; |
|
} |
|
|
|
/* resets the header to point fcoe/fc */ |
|
skb_set_network_header(skb, skb->mac_len); |
|
skb_set_transport_header(skb, skb->mac_len + |
|
sizeof(struct fcoe_hdr)); |
|
|
|
/* sets up SOF and ORIS */ |
|
sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof; |
|
switch (sof) { |
|
case FC_SOF_I2: |
|
fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS; |
|
break; |
|
case FC_SOF_I3: |
|
fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF | |
|
IXGBE_ADVTXD_FCOEF_ORIS; |
|
break; |
|
case FC_SOF_N2: |
|
break; |
|
case FC_SOF_N3: |
|
fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF; |
|
break; |
|
default: |
|
dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof); |
|
return -EINVAL; |
|
} |
|
|
|
/* the first byte of the last dword is EOF */ |
|
skb_copy_bits(skb, skb->len - 4, &eof, 1); |
|
/* sets up EOF and ORIE */ |
|
switch (eof) { |
|
case FC_EOF_N: |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N; |
|
break; |
|
case FC_EOF_T: |
|
/* lso needs ORIE */ |
|
if (skb_is_gso(skb)) |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N | |
|
IXGBE_ADVTXD_FCOEF_ORIE; |
|
else |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T; |
|
break; |
|
case FC_EOF_NI: |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI; |
|
break; |
|
case FC_EOF_A: |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A; |
|
break; |
|
default: |
|
dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof); |
|
return -EINVAL; |
|
} |
|
|
|
/* sets up PARINC indicating data offset */ |
|
fh = (struct fc_frame_header *)skb_transport_header(skb); |
|
if (fh->fh_f_ctl[2] & FC_FC_REL_OFF) |
|
fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC; |
|
|
|
/* include trailer in headlen as it is replicated per frame */ |
|
*hdr_len = sizeof(struct fcoe_crc_eof); |
|
|
|
/* hdr_len includes fc_hdr if FCoE LSO is enabled */ |
|
if (skb_is_gso(skb)) { |
|
*hdr_len += skb_transport_offset(skb) + |
|
sizeof(struct fc_frame_header); |
|
/* update gso_segs and bytecount */ |
|
first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len, |
|
skb_shinfo(skb)->gso_size); |
|
first->bytecount += (first->gso_segs - 1) * *hdr_len; |
|
first->tx_flags |= IXGBE_TX_FLAGS_TSO; |
|
/* Hardware expects L4T to be RSV for FCoE TSO */ |
|
type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV; |
|
} |
|
|
|
/* set flag indicating FCOE to ixgbe_tx_map call */ |
|
first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC; |
|
|
|
/* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */ |
|
mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; |
|
|
|
/* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ |
|
vlan_macip_lens = skb_transport_offset(skb) + |
|
sizeof(struct fc_frame_header); |
|
vlan_macip_lens |= (skb_transport_offset(skb) - 4) |
|
<< IXGBE_ADVTXD_MACLEN_SHIFT; |
|
vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; |
|
|
|
/* write context desc */ |
|
ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof, |
|
type_tucmd, mss_l4len_idx); |
|
|
|
return 0; |
|
} |
|
|
|
static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu) |
|
{ |
|
struct ixgbe_fcoe_ddp_pool *ddp_pool; |
|
|
|
ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); |
|
dma_pool_destroy(ddp_pool->pool); |
|
ddp_pool->pool = NULL; |
|
} |
|
|
|
static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe, |
|
struct device *dev, |
|
unsigned int cpu) |
|
{ |
|
struct ixgbe_fcoe_ddp_pool *ddp_pool; |
|
struct dma_pool *pool; |
|
char pool_name[32]; |
|
|
|
snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu); |
|
|
|
pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX, |
|
IXGBE_FCPTR_ALIGN, PAGE_SIZE); |
|
if (!pool) |
|
return -ENOMEM; |
|
|
|
ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu); |
|
ddp_pool->pool = pool; |
|
ddp_pool->noddp = 0; |
|
ddp_pool->noddp_ext_buff = 0; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbe_configure_fcoe - configures registers for fcoe at start |
|
* @adapter: ptr to ixgbe adapter |
|
* |
|
* This sets up FCoE related registers |
|
* |
|
* Returns : none |
|
*/ |
|
void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter) |
|
{ |
|
struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; |
|
struct ixgbe_hw *hw = &adapter->hw; |
|
int i, fcoe_q, fcoe_i, fcoe_q_h = 0; |
|
int fcreta_size; |
|
u32 etqf; |
|
|
|
/* Minimal functionality for FCoE requires at least CRC offloads */ |
|
if (!(adapter->netdev->features & NETIF_F_FCOE_CRC)) |
|
return; |
|
|
|
/* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */ |
|
etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN; |
|
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { |
|
etqf |= IXGBE_ETQF_POOL_ENABLE; |
|
etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; |
|
} |
|
IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf); |
|
IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0); |
|
|
|
/* leave registers un-configured if FCoE is disabled */ |
|
if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) |
|
return; |
|
|
|
/* Use one or more Rx queues for FCoE by redirection table */ |
|
fcreta_size = IXGBE_FCRETA_SIZE; |
|
if (adapter->hw.mac.type == ixgbe_mac_X550) |
|
fcreta_size = IXGBE_FCRETA_SIZE_X550; |
|
|
|
for (i = 0; i < fcreta_size; i++) { |
|
if (adapter->hw.mac.type == ixgbe_mac_X550) { |
|
int fcoe_i_h = fcoe->offset + ((i + fcreta_size) % |
|
fcoe->indices); |
|
fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx; |
|
fcoe_q_h = (fcoe_q_h << IXGBE_FCRETA_ENTRY_HIGH_SHIFT) & |
|
IXGBE_FCRETA_ENTRY_HIGH_MASK; |
|
} |
|
|
|
fcoe_i = fcoe->offset + (i % fcoe->indices); |
|
fcoe_i &= IXGBE_FCRETA_ENTRY_MASK; |
|
fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx; |
|
fcoe_q |= fcoe_q_h; |
|
IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q); |
|
} |
|
IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA); |
|
|
|
/* Enable L2 EtherType filter for FIP */ |
|
etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN; |
|
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) { |
|
etqf |= IXGBE_ETQF_POOL_ENABLE; |
|
etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT; |
|
} |
|
IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf); |
|
|
|
/* Send FIP frames to the first FCoE queue */ |
|
fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx; |
|
IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP), |
|
IXGBE_ETQS_QUEUE_EN | |
|
(fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT)); |
|
|
|
/* Configure FCoE Rx control */ |
|
IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, |
|
IXGBE_FCRXCTRL_FCCRCBO | |
|
(FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT)); |
|
} |
|
|
|
/** |
|
* ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources |
|
* @adapter : ixgbe adapter |
|
* |
|
* Cleans up outstanding ddp context resources |
|
* |
|
* Returns : none |
|
*/ |
|
void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter) |
|
{ |
|
struct ixgbe_fcoe *fcoe = &adapter->fcoe; |
|
int cpu, i, ddp_max; |
|
|
|
/* do nothing if no DDP pools were allocated */ |
|
if (!fcoe->ddp_pool) |
|
return; |
|
|
|
ddp_max = IXGBE_FCOE_DDP_MAX; |
|
/* X550 has different DDP Max limit */ |
|
if (adapter->hw.mac.type == ixgbe_mac_X550) |
|
ddp_max = IXGBE_FCOE_DDP_MAX_X550; |
|
|
|
for (i = 0; i < ddp_max; i++) |
|
ixgbe_fcoe_ddp_put(adapter->netdev, i); |
|
|
|
for_each_possible_cpu(cpu) |
|
ixgbe_fcoe_dma_pool_free(fcoe, cpu); |
|
|
|
dma_unmap_single(&adapter->pdev->dev, |
|
fcoe->extra_ddp_buffer_dma, |
|
IXGBE_FCBUFF_MIN, |
|
DMA_FROM_DEVICE); |
|
kfree(fcoe->extra_ddp_buffer); |
|
|
|
fcoe->extra_ddp_buffer = NULL; |
|
fcoe->extra_ddp_buffer_dma = 0; |
|
} |
|
|
|
/** |
|
* ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources |
|
* @adapter: ixgbe adapter |
|
* |
|
* Sets up ddp context resouces |
|
* |
|
* Returns : 0 indicates success or -EINVAL on failure |
|
*/ |
|
int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter) |
|
{ |
|
struct ixgbe_fcoe *fcoe = &adapter->fcoe; |
|
struct device *dev = &adapter->pdev->dev; |
|
void *buffer; |
|
dma_addr_t dma; |
|
unsigned int cpu; |
|
|
|
/* do nothing if no DDP pools were allocated */ |
|
if (!fcoe->ddp_pool) |
|
return 0; |
|
|
|
/* Extra buffer to be shared by all DDPs for HW work around */ |
|
buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL); |
|
if (!buffer) |
|
return -ENOMEM; |
|
|
|
dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE); |
|
if (dma_mapping_error(dev, dma)) { |
|
e_err(drv, "failed to map extra DDP buffer\n"); |
|
kfree(buffer); |
|
return -ENOMEM; |
|
} |
|
|
|
fcoe->extra_ddp_buffer = buffer; |
|
fcoe->extra_ddp_buffer_dma = dma; |
|
|
|
/* allocate pci pool for each cpu */ |
|
for_each_possible_cpu(cpu) { |
|
int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu); |
|
if (!err) |
|
continue; |
|
|
|
e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu); |
|
ixgbe_free_fcoe_ddp_resources(adapter); |
|
return -ENOMEM; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter) |
|
{ |
|
struct ixgbe_fcoe *fcoe = &adapter->fcoe; |
|
|
|
if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) |
|
return -EINVAL; |
|
|
|
fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool); |
|
|
|
if (!fcoe->ddp_pool) { |
|
e_err(drv, "failed to allocate percpu DDP resources\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1; |
|
/* X550 has different DDP Max limit */ |
|
if (adapter->hw.mac.type == ixgbe_mac_X550) |
|
adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX_X550 - 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter) |
|
{ |
|
struct ixgbe_fcoe *fcoe = &adapter->fcoe; |
|
|
|
adapter->netdev->fcoe_ddp_xid = 0; |
|
|
|
if (!fcoe->ddp_pool) |
|
return; |
|
|
|
free_percpu(fcoe->ddp_pool); |
|
fcoe->ddp_pool = NULL; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_enable - turn on FCoE offload feature |
|
* @netdev: the corresponding netdev |
|
* |
|
* Turns on FCoE offload feature in 82599. |
|
* |
|
* Returns : 0 indicates success or -EINVAL on failure |
|
*/ |
|
int ixgbe_fcoe_enable(struct net_device *netdev) |
|
{ |
|
struct ixgbe_adapter *adapter = netdev_priv(netdev); |
|
struct ixgbe_fcoe *fcoe = &adapter->fcoe; |
|
|
|
atomic_inc(&fcoe->refcnt); |
|
|
|
if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE)) |
|
return -EINVAL; |
|
|
|
if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) |
|
return -EINVAL; |
|
|
|
e_info(drv, "Enabling FCoE offload features.\n"); |
|
|
|
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) |
|
e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n"); |
|
|
|
if (netif_running(netdev)) |
|
netdev->netdev_ops->ndo_stop(netdev); |
|
|
|
/* Allocate per CPU memory to track DDP pools */ |
|
ixgbe_fcoe_ddp_enable(adapter); |
|
|
|
/* enable FCoE and notify stack */ |
|
adapter->flags |= IXGBE_FLAG_FCOE_ENABLED; |
|
netdev->features |= NETIF_F_FCOE_MTU; |
|
netdev_features_change(netdev); |
|
|
|
/* release existing queues and reallocate them */ |
|
ixgbe_clear_interrupt_scheme(adapter); |
|
ixgbe_init_interrupt_scheme(adapter); |
|
|
|
if (netif_running(netdev)) |
|
netdev->netdev_ops->ndo_open(netdev); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_disable - turn off FCoE offload feature |
|
* @netdev: the corresponding netdev |
|
* |
|
* Turns off FCoE offload feature in 82599. |
|
* |
|
* Returns : 0 indicates success or -EINVAL on failure |
|
*/ |
|
int ixgbe_fcoe_disable(struct net_device *netdev) |
|
{ |
|
struct ixgbe_adapter *adapter = netdev_priv(netdev); |
|
|
|
if (!atomic_dec_and_test(&adapter->fcoe.refcnt)) |
|
return -EINVAL; |
|
|
|
if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) |
|
return -EINVAL; |
|
|
|
e_info(drv, "Disabling FCoE offload features.\n"); |
|
if (netif_running(netdev)) |
|
netdev->netdev_ops->ndo_stop(netdev); |
|
|
|
/* Free per CPU memory to track DDP pools */ |
|
ixgbe_fcoe_ddp_disable(adapter); |
|
|
|
/* disable FCoE and notify stack */ |
|
adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; |
|
netdev->features &= ~NETIF_F_FCOE_MTU; |
|
|
|
netdev_features_change(netdev); |
|
|
|
/* release existing queues and reallocate them */ |
|
ixgbe_clear_interrupt_scheme(adapter); |
|
ixgbe_init_interrupt_scheme(adapter); |
|
|
|
if (netif_running(netdev)) |
|
netdev->netdev_ops->ndo_open(netdev); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_get_wwn - get world wide name for the node or the port |
|
* @netdev : ixgbe adapter |
|
* @wwn : the world wide name |
|
* @type: the type of world wide name |
|
* |
|
* Returns the node or port world wide name if both the prefix and the san |
|
* mac address are valid, then the wwn is formed based on the NAA-2 for |
|
* IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3). |
|
* |
|
* Returns : 0 on success |
|
*/ |
|
int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) |
|
{ |
|
u16 prefix = 0xffff; |
|
struct ixgbe_adapter *adapter = netdev_priv(netdev); |
|
struct ixgbe_mac_info *mac = &adapter->hw.mac; |
|
|
|
switch (type) { |
|
case NETDEV_FCOE_WWNN: |
|
prefix = mac->wwnn_prefix; |
|
break; |
|
case NETDEV_FCOE_WWPN: |
|
prefix = mac->wwpn_prefix; |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
if ((prefix != 0xffff) && |
|
is_valid_ether_addr(mac->san_addr)) { |
|
*wwn = ((u64) prefix << 48) | |
|
((u64) mac->san_addr[0] << 40) | |
|
((u64) mac->san_addr[1] << 32) | |
|
((u64) mac->san_addr[2] << 24) | |
|
((u64) mac->san_addr[3] << 16) | |
|
((u64) mac->san_addr[4] << 8) | |
|
((u64) mac->san_addr[5]); |
|
return 0; |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_get_hbainfo - get FCoE HBA information |
|
* @netdev : ixgbe adapter |
|
* @info : HBA information |
|
* |
|
* Returns ixgbe HBA information |
|
* |
|
* Returns : 0 on success |
|
*/ |
|
int ixgbe_fcoe_get_hbainfo(struct net_device *netdev, |
|
struct netdev_fcoe_hbainfo *info) |
|
{ |
|
struct ixgbe_adapter *adapter = netdev_priv(netdev); |
|
struct ixgbe_hw *hw = &adapter->hw; |
|
u64 dsn; |
|
|
|
if (!info) |
|
return -EINVAL; |
|
|
|
/* Don't return information on unsupported devices */ |
|
if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) |
|
return -EINVAL; |
|
|
|
/* Manufacturer */ |
|
snprintf(info->manufacturer, sizeof(info->manufacturer), |
|
"Intel Corporation"); |
|
|
|
/* Serial Number */ |
|
|
|
/* Get the PCI-e Device Serial Number Capability */ |
|
dsn = pci_get_dsn(adapter->pdev); |
|
if (dsn) |
|
snprintf(info->serial_number, sizeof(info->serial_number), |
|
"%016llX", dsn); |
|
else |
|
snprintf(info->serial_number, sizeof(info->serial_number), |
|
"Unknown"); |
|
|
|
/* Hardware Version */ |
|
snprintf(info->hardware_version, |
|
sizeof(info->hardware_version), |
|
"Rev %d", hw->revision_id); |
|
/* Driver Name/Version */ |
|
snprintf(info->driver_version, |
|
sizeof(info->driver_version), |
|
"%s v%s", |
|
ixgbe_driver_name, |
|
UTS_RELEASE); |
|
/* Firmware Version */ |
|
strlcpy(info->firmware_version, adapter->eeprom_id, |
|
sizeof(info->firmware_version)); |
|
|
|
/* Model */ |
|
if (hw->mac.type == ixgbe_mac_82599EB) { |
|
snprintf(info->model, |
|
sizeof(info->model), |
|
"Intel 82599"); |
|
} else if (hw->mac.type == ixgbe_mac_X550) { |
|
snprintf(info->model, |
|
sizeof(info->model), |
|
"Intel X550"); |
|
} else { |
|
snprintf(info->model, |
|
sizeof(info->model), |
|
"Intel X540"); |
|
} |
|
|
|
/* Model Description */ |
|
snprintf(info->model_description, |
|
sizeof(info->model_description), |
|
"%s", |
|
ixgbe_default_device_descr); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to |
|
* @adapter: pointer to the device adapter structure |
|
* |
|
* Return : TC that FCoE is mapped to |
|
*/ |
|
u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter) |
|
{ |
|
#ifdef CONFIG_IXGBE_DCB |
|
return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up); |
|
#else |
|
return 0; |
|
#endif |
|
}
|
|
|