sfc_ef100: implement MCDI transport
Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
David S. Miller
parent
35a36af88f
commit
2200e6d92e
@ -25,11 +25,23 @@
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#include "ef100_netdev.h"
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#define EF100_MAX_VIS 4096
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#define EF100_NUM_MCDI_BUFFERS 1
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#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
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#define EF100_RESET_PORT ((ETH_RESET_MAC | ETH_RESET_PHY) << ETH_RESET_SHARED_SHIFT)
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/* MCDI
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*/
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static u8 *ef100_mcdi_buf(struct efx_nic *efx, u8 bufid, dma_addr_t *dma_addr)
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{
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struct ef100_nic_data *nic_data = efx->nic_data;
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if (dma_addr)
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*dma_addr = nic_data->mcdi_buf.dma_addr +
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bufid * ALIGN(MCDI_BUF_LEN, 256);
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return nic_data->mcdi_buf.addr + bufid * ALIGN(MCDI_BUF_LEN, 256);
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}
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static int ef100_get_warm_boot_count(struct efx_nic *efx)
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{
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efx_dword_t reg;
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@ -46,6 +58,72 @@ static int ef100_get_warm_boot_count(struct efx_nic *efx)
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}
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}
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static void ef100_mcdi_request(struct efx_nic *efx,
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const efx_dword_t *hdr, size_t hdr_len,
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const efx_dword_t *sdu, size_t sdu_len)
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{
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dma_addr_t dma_addr;
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u8 *pdu = ef100_mcdi_buf(efx, 0, &dma_addr);
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memcpy(pdu, hdr, hdr_len);
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memcpy(pdu + hdr_len, sdu, sdu_len);
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wmb();
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/* The hardware provides 'low' and 'high' (doorbell) registers
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* for passing the 64-bit address of an MCDI request to
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* firmware. However the dwords are swapped by firmware. The
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* least significant bits of the doorbell are then 0 for all
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* MCDI requests due to alignment.
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*/
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_efx_writed(efx, cpu_to_le32((u64)dma_addr >> 32), efx_reg(efx, ER_GZ_MC_DB_LWRD));
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_efx_writed(efx, cpu_to_le32((u32)dma_addr), efx_reg(efx, ER_GZ_MC_DB_HWRD));
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}
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static bool ef100_mcdi_poll_response(struct efx_nic *efx)
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{
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const efx_dword_t hdr =
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*(const efx_dword_t *)(ef100_mcdi_buf(efx, 0, NULL));
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rmb();
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return EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE);
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}
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static void ef100_mcdi_read_response(struct efx_nic *efx,
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efx_dword_t *outbuf, size_t offset,
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size_t outlen)
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{
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const u8 *pdu = ef100_mcdi_buf(efx, 0, NULL);
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memcpy(outbuf, pdu + offset, outlen);
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}
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static int ef100_mcdi_poll_reboot(struct efx_nic *efx)
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{
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struct ef100_nic_data *nic_data = efx->nic_data;
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int rc;
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rc = ef100_get_warm_boot_count(efx);
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if (rc < 0) {
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/* The firmware is presumably in the process of
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* rebooting. However, we are supposed to report each
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* reboot just once, so we must only do that once we
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* can read and store the updated warm boot count.
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*/
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return 0;
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}
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if (rc == nic_data->warm_boot_count)
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return 0;
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nic_data->warm_boot_count = rc;
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return -EIO;
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}
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static void ef100_mcdi_reboot_detected(struct efx_nic *efx)
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{
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}
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/* Event handling
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*/
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static int ef100_ev_probe(struct efx_channel *channel)
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@ -139,6 +217,11 @@ const struct efx_nic_type ef100_pf_nic_type = {
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.is_vf = false,
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.probe = ef100_probe_pf,
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.mcdi_max_ver = 2,
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.mcdi_request = ef100_mcdi_request,
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.mcdi_poll_response = ef100_mcdi_poll_response,
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.mcdi_read_response = ef100_mcdi_read_response,
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.mcdi_poll_reboot = ef100_mcdi_poll_reboot,
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.mcdi_reboot_detected = ef100_mcdi_reboot_detected,
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.irq_enable_master = efx_port_dummy_op_void,
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.irq_disable_non_ev = efx_port_dummy_op_void,
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.push_irq_moderation = efx_channel_dummy_op_void,
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@ -178,6 +261,15 @@ static int ef100_probe_main(struct efx_nic *efx)
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net_dev->features |= efx->type->offload_features;
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net_dev->hw_features |= efx->type->offload_features;
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/* we assume later that we can copy from this buffer in dwords */
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BUILD_BUG_ON(MCDI_CTL_SDU_LEN_MAX_V2 % 4);
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/* MCDI buffers must be 256 byte aligned. */
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rc = efx_nic_alloc_buffer(efx, &nic_data->mcdi_buf, MCDI_BUF_LEN,
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GFP_KERNEL);
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if (rc)
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goto fail;
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/* Get the MC's warm boot count. In case it's rebooting right
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* now, be prepared to retry.
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*/
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@ -201,6 +293,16 @@ static int ef100_probe_main(struct efx_nic *efx)
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/* Post-IO section. */
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rc = efx_mcdi_init(efx);
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if (!rc && efx->mcdi->fn_flags &
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(1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
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netif_info(efx, probe, efx->net_dev,
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"No network port on this PCI function");
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rc = -ENODEV;
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}
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if (rc)
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goto fail;
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efx->max_vis = EF100_MAX_VIS;
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rc = ef100_phy_probe(efx);
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@ -233,6 +335,10 @@ void ef100_remove(struct efx_nic *efx)
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efx_fini_channels(efx);
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kfree(efx->phy_data);
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efx->phy_data = NULL;
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efx_mcdi_detach(efx);
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efx_mcdi_fini(efx);
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if (nic_data)
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efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
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kfree(nic_data);
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efx->nic_data = NULL;
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}
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@ -19,6 +19,7 @@ void ef100_remove(struct efx_nic *efx);
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struct ef100_nic_data {
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struct efx_nic *efx;
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struct efx_buffer mcdi_buf;
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u16 warm_boot_count;
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};
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