static int siena_mcdi_poll_reboot(struct efx_nic *efx)
{
struct siena_nic_data *nic_data = efx->nic_data;
unsigned int addr = FR_CZ_MC_TREG_SMEM + MCDI_STATUS(efx);
efx_dword_t reg;
u32 value;
efx_readd(efx, ®, addr);
value = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
if (value == 0)
return 0;
EFX_ZERO_DWORD(reg);
efx_writed(efx, ®, addr);
/* MAC statistics have been cleared on the NIC; clear the local
* copies that we update with efx_update_diff_stat().
*/
nic_data->stats[SIENA_STAT_tx_good_bytes] = 0;
nic_data->stats[SIENA_STAT_rx_good_bytes] = 0;
if (value == MC_STATUS_DWORD_ASSERT)
return -EINTR;
else
return -EIO;
}
inline void falcon_irq_ack_a1(struct efx_nic *efx)
{
efx_dword_t reg;
EFX_POPULATE_DWORD_1(reg, FRF_AA_INT_ACK_KER_FIELD, 0xb7eb7e);
efx_writed(efx, ®, FR_AA_INT_ACK_KER);
efx_readd(efx, ®, FR_AA_WORK_AROUND_BROKEN_PCI_READS);
}
static void siena_mcdi_request(struct efx_nic *efx,
const efx_dword_t *hdr, size_t hdr_len,
const efx_dword_t *sdu, size_t sdu_len)
{
unsigned pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
unsigned doorbell = FR_CZ_MC_TREG_SMEM + MCDI_DOORBELL(efx);
unsigned int i;
unsigned int inlen_dw = DIV_ROUND_UP(sdu_len, 4);
EFX_WARN_ON_PARANOID(hdr_len != 4);
efx_writed(efx, hdr, pdu);
for (i = 0; i < inlen_dw; i++)
efx_writed(efx, &sdu[i], pdu + hdr_len + 4 * i);
/* Ensure the request is written out before the doorbell */
wmb();
/* ring the doorbell with a distinctive value */
_efx_writed(efx, (__force __le32) 0x45789abc, doorbell);
}
static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd,
const u8 *inbuf, size_t inlen)
{
struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
unsigned pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
unsigned doorbell = FR_CZ_MC_TREG_SMEM + MCDI_DOORBELL(efx);
unsigned int i;
efx_dword_t hdr;
u32 xflags, seqno;
BUG_ON(atomic_read(&mcdi->state) == MCDI_STATE_QUIESCENT);
BUG_ON(inlen & 3 || inlen >= 0x100);
seqno = mcdi->seqno & SEQ_MASK;
xflags = 0;
if (mcdi->mode == MCDI_MODE_EVENTS)
xflags |= MCDI_HEADER_XFLAGS_EVREQ;
EFX_POPULATE_DWORD_6(hdr,
MCDI_HEADER_RESPONSE, 0,
MCDI_HEADER_RESYNC, 1,
MCDI_HEADER_CODE, cmd,
MCDI_HEADER_DATALEN, inlen,
MCDI_HEADER_SEQ, seqno,
MCDI_HEADER_XFLAGS, xflags);
efx_writed(efx, &hdr, pdu);
for (i = 0; i < inlen; i += 4) {
_efx_writed(efx, *((__le32 *)(inbuf + i)), pdu + 4 + i);
/* use wmb() within loop to inhibit write combining */
wmb();
}
/* ring the doorbell with a distinctive value */
_efx_writed(efx, (__force __le32) 0x45789abc, doorbell);
wmb();
}
/* Test and clear MC-rebooted flag for this port/function */
int efx_mcdi_poll_reboot(struct efx_nic *efx)
{
unsigned int addr = FR_CZ_MC_TREG_SMEM + MCDI_REBOOT_FLAG(efx);
efx_dword_t reg;
uint32_t value;
if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
return false;
efx_readd(efx, ®, addr);
value = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
if (value == 0)
return 0;
EFX_ZERO_DWORD(reg);
efx_writed(efx, ®, addr);
if (value == MC_STATUS_DWORD_ASSERT)
return -EINTR;
else
return -EIO;
}
