Commit 2200e6d9 authored by Edward Cree's avatar Edward Cree Committed by David S. Miller

sfc_ef100: implement MCDI transport

Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 35a36af8
...@@ -25,11 +25,23 @@ ...@@ -25,11 +25,23 @@
#include "ef100_netdev.h" #include "ef100_netdev.h"
#define EF100_MAX_VIS 4096 #define EF100_MAX_VIS 4096
#define EF100_NUM_MCDI_BUFFERS 1
#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
#define EF100_RESET_PORT ((ETH_RESET_MAC | ETH_RESET_PHY) << ETH_RESET_SHARED_SHIFT) #define EF100_RESET_PORT ((ETH_RESET_MAC | ETH_RESET_PHY) << ETH_RESET_SHARED_SHIFT)
/* MCDI /* MCDI
*/ */
static u8 *ef100_mcdi_buf(struct efx_nic *efx, u8 bufid, dma_addr_t *dma_addr)
{
struct ef100_nic_data *nic_data = efx->nic_data;
if (dma_addr)
*dma_addr = nic_data->mcdi_buf.dma_addr +
bufid * ALIGN(MCDI_BUF_LEN, 256);
return nic_data->mcdi_buf.addr + bufid * ALIGN(MCDI_BUF_LEN, 256);
}
static int ef100_get_warm_boot_count(struct efx_nic *efx) static int ef100_get_warm_boot_count(struct efx_nic *efx)
{ {
efx_dword_t reg; efx_dword_t reg;
...@@ -46,6 +58,72 @@ static int ef100_get_warm_boot_count(struct efx_nic *efx) ...@@ -46,6 +58,72 @@ static int ef100_get_warm_boot_count(struct efx_nic *efx)
} }
} }
static void ef100_mcdi_request(struct efx_nic *efx,
const efx_dword_t *hdr, size_t hdr_len,
const efx_dword_t *sdu, size_t sdu_len)
{
dma_addr_t dma_addr;
u8 *pdu = ef100_mcdi_buf(efx, 0, &dma_addr);
memcpy(pdu, hdr, hdr_len);
memcpy(pdu + hdr_len, sdu, sdu_len);
wmb();
/* The hardware provides 'low' and 'high' (doorbell) registers
* for passing the 64-bit address of an MCDI request to
* firmware. However the dwords are swapped by firmware. The
* least significant bits of the doorbell are then 0 for all
* MCDI requests due to alignment.
*/
_efx_writed(efx, cpu_to_le32((u64)dma_addr >> 32), efx_reg(efx, ER_GZ_MC_DB_LWRD));
_efx_writed(efx, cpu_to_le32((u32)dma_addr), efx_reg(efx, ER_GZ_MC_DB_HWRD));
}
static bool ef100_mcdi_poll_response(struct efx_nic *efx)
{
const efx_dword_t hdr =
*(const efx_dword_t *)(ef100_mcdi_buf(efx, 0, NULL));
rmb();
return EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE);
}
static void ef100_mcdi_read_response(struct efx_nic *efx,
efx_dword_t *outbuf, size_t offset,
size_t outlen)
{
const u8 *pdu = ef100_mcdi_buf(efx, 0, NULL);
memcpy(outbuf, pdu + offset, outlen);
}
static int ef100_mcdi_poll_reboot(struct efx_nic *efx)
{
struct ef100_nic_data *nic_data = efx->nic_data;
int rc;
rc = ef100_get_warm_boot_count(efx);
if (rc < 0) {
/* The firmware is presumably in the process of
* rebooting. However, we are supposed to report each
* reboot just once, so we must only do that once we
* can read and store the updated warm boot count.
*/
return 0;
}
if (rc == nic_data->warm_boot_count)
return 0;
nic_data->warm_boot_count = rc;
return -EIO;
}
static void ef100_mcdi_reboot_detected(struct efx_nic *efx)
{
}
/* Event handling /* Event handling
*/ */
static int ef100_ev_probe(struct efx_channel *channel) static int ef100_ev_probe(struct efx_channel *channel)
...@@ -139,6 +217,11 @@ const struct efx_nic_type ef100_pf_nic_type = { ...@@ -139,6 +217,11 @@ const struct efx_nic_type ef100_pf_nic_type = {
.is_vf = false, .is_vf = false,
.probe = ef100_probe_pf, .probe = ef100_probe_pf,
.mcdi_max_ver = 2, .mcdi_max_ver = 2,
.mcdi_request = ef100_mcdi_request,
.mcdi_poll_response = ef100_mcdi_poll_response,
.mcdi_read_response = ef100_mcdi_read_response,
.mcdi_poll_reboot = ef100_mcdi_poll_reboot,
.mcdi_reboot_detected = ef100_mcdi_reboot_detected,
.irq_enable_master = efx_port_dummy_op_void, .irq_enable_master = efx_port_dummy_op_void,
.irq_disable_non_ev = efx_port_dummy_op_void, .irq_disable_non_ev = efx_port_dummy_op_void,
.push_irq_moderation = efx_channel_dummy_op_void, .push_irq_moderation = efx_channel_dummy_op_void,
...@@ -178,6 +261,15 @@ static int ef100_probe_main(struct efx_nic *efx) ...@@ -178,6 +261,15 @@ static int ef100_probe_main(struct efx_nic *efx)
net_dev->features |= efx->type->offload_features; net_dev->features |= efx->type->offload_features;
net_dev->hw_features |= efx->type->offload_features; net_dev->hw_features |= efx->type->offload_features;
/* we assume later that we can copy from this buffer in dwords */
BUILD_BUG_ON(MCDI_CTL_SDU_LEN_MAX_V2 % 4);
/* MCDI buffers must be 256 byte aligned. */
rc = efx_nic_alloc_buffer(efx, &nic_data->mcdi_buf, MCDI_BUF_LEN,
GFP_KERNEL);
if (rc)
goto fail;
/* Get the MC's warm boot count. In case it's rebooting right /* Get the MC's warm boot count. In case it's rebooting right
* now, be prepared to retry. * now, be prepared to retry.
*/ */
...@@ -201,6 +293,16 @@ static int ef100_probe_main(struct efx_nic *efx) ...@@ -201,6 +293,16 @@ static int ef100_probe_main(struct efx_nic *efx)
/* Post-IO section. */ /* Post-IO section. */
rc = efx_mcdi_init(efx);
if (!rc && efx->mcdi->fn_flags &
(1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
netif_info(efx, probe, efx->net_dev,
"No network port on this PCI function");
rc = -ENODEV;
}
if (rc)
goto fail;
efx->max_vis = EF100_MAX_VIS; efx->max_vis = EF100_MAX_VIS;
rc = ef100_phy_probe(efx); rc = ef100_phy_probe(efx);
...@@ -233,6 +335,10 @@ void ef100_remove(struct efx_nic *efx) ...@@ -233,6 +335,10 @@ void ef100_remove(struct efx_nic *efx)
efx_fini_channels(efx); efx_fini_channels(efx);
kfree(efx->phy_data); kfree(efx->phy_data);
efx->phy_data = NULL; efx->phy_data = NULL;
efx_mcdi_detach(efx);
efx_mcdi_fini(efx);
if (nic_data)
efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
kfree(nic_data); kfree(nic_data);
efx->nic_data = NULL; efx->nic_data = NULL;
} }
...@@ -19,6 +19,7 @@ void ef100_remove(struct efx_nic *efx); ...@@ -19,6 +19,7 @@ void ef100_remove(struct efx_nic *efx);
struct ef100_nic_data { struct ef100_nic_data {
struct efx_nic *efx; struct efx_nic *efx;
struct efx_buffer mcdi_buf;
u16 warm_boot_count; u16 warm_boot_count;
}; };
......
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