diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/sfc/mcdi.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/sfc/mcdi.c | 269 |
1 files changed, 216 insertions, 53 deletions
diff --git a/kernel/drivers/net/ethernet/sfc/mcdi.c b/kernel/drivers/net/ethernet/sfc/mcdi.c index d37928f01..41fb6b60a 100644 --- a/kernel/drivers/net/ethernet/sfc/mcdi.c +++ b/kernel/drivers/net/ethernet/sfc/mcdi.c @@ -8,7 +8,8 @@ */ #include <linux/delay.h> -#include <asm/cmpxchg.h> +#include <linux/moduleparam.h> +#include <linux/atomic.h> #include "net_driver.h" #include "nic.h" #include "io.h" @@ -54,18 +55,32 @@ static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating, static bool efx_mcdi_poll_once(struct efx_nic *efx); static void efx_mcdi_abandon(struct efx_nic *efx); +#ifdef CONFIG_SFC_MCDI_LOGGING +static bool mcdi_logging_default; +module_param(mcdi_logging_default, bool, 0644); +MODULE_PARM_DESC(mcdi_logging_default, + "Enable MCDI logging on newly-probed functions"); +#endif + int efx_mcdi_init(struct efx_nic *efx) { struct efx_mcdi_iface *mcdi; bool already_attached; - int rc; + int rc = -ENOMEM; efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL); if (!efx->mcdi) - return -ENOMEM; + goto fail; mcdi = efx_mcdi(efx); mcdi->efx = efx; +#ifdef CONFIG_SFC_MCDI_LOGGING + /* consuming code assumes buffer is page-sized */ + mcdi->logging_buffer = (char *)__get_free_page(GFP_KERNEL); + if (!mcdi->logging_buffer) + goto fail1; + mcdi->logging_enabled = mcdi_logging_default; +#endif init_waitqueue_head(&mcdi->wq); spin_lock_init(&mcdi->iface_lock); mcdi->state = MCDI_STATE_QUIESCENT; @@ -81,7 +96,7 @@ int efx_mcdi_init(struct efx_nic *efx) /* Recover from a failed assertion before probing */ rc = efx_mcdi_handle_assertion(efx); if (rc) - return rc; + goto fail2; /* Let the MC (and BMC, if this is a LOM) know that the driver * is loaded. We should do this before we reset the NIC. @@ -90,7 +105,7 @@ int efx_mcdi_init(struct efx_nic *efx) if (rc) { netif_err(efx, probe, efx->net_dev, "Unable to register driver with MCPU\n"); - return rc; + goto fail2; } if (already_attached) /* Not a fatal error */ @@ -102,6 +117,15 @@ int efx_mcdi_init(struct efx_nic *efx) efx->primary = efx; return 0; +fail2: +#ifdef CONFIG_SFC_MCDI_LOGGING + free_page((unsigned long)mcdi->logging_buffer); +fail1: +#endif + kfree(efx->mcdi); + efx->mcdi = NULL; +fail: + return rc; } void efx_mcdi_fini(struct efx_nic *efx) @@ -114,6 +138,10 @@ void efx_mcdi_fini(struct efx_nic *efx) /* Relinquish the device (back to the BMC, if this is a LOM) */ efx_mcdi_drv_attach(efx, false, NULL); +#ifdef CONFIG_SFC_MCDI_LOGGING + free_page((unsigned long)efx->mcdi->iface.logging_buffer); +#endif + kfree(efx->mcdi); } @@ -121,6 +149,9 @@ static void efx_mcdi_send_request(struct efx_nic *efx, unsigned cmd, const efx_dword_t *inbuf, size_t inlen) { struct efx_mcdi_iface *mcdi = efx_mcdi(efx); +#ifdef CONFIG_SFC_MCDI_LOGGING + char *buf = mcdi->logging_buffer; /* page-sized */ +#endif efx_dword_t hdr[2]; size_t hdr_len; u32 xflags, seqno; @@ -165,6 +196,31 @@ static void efx_mcdi_send_request(struct efx_nic *efx, unsigned cmd, hdr_len = 8; } +#ifdef CONFIG_SFC_MCDI_LOGGING + if (mcdi->logging_enabled && !WARN_ON_ONCE(!buf)) { + int bytes = 0; + int i; + /* Lengths should always be a whole number of dwords, so scream + * if they're not. + */ + WARN_ON_ONCE(hdr_len % 4); + WARN_ON_ONCE(inlen % 4); + + /* We own the logging buffer, as only one MCDI can be in + * progress on a NIC at any one time. So no need for locking. + */ + for (i = 0; i < hdr_len / 4 && bytes < PAGE_SIZE; i++) + bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, + " %08x", le32_to_cpu(hdr[i].u32[0])); + + for (i = 0; i < inlen / 4 && bytes < PAGE_SIZE; i++) + bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, + " %08x", le32_to_cpu(inbuf[i].u32[0])); + + netif_info(efx, hw, efx->net_dev, "MCDI RPC REQ:%s\n", buf); + } +#endif + efx->type->mcdi_request(efx, hdr, hdr_len, inbuf, inlen); mcdi->new_epoch = false; @@ -206,6 +262,9 @@ static void efx_mcdi_read_response_header(struct efx_nic *efx) { struct efx_mcdi_iface *mcdi = efx_mcdi(efx); unsigned int respseq, respcmd, error; +#ifdef CONFIG_SFC_MCDI_LOGGING + char *buf = mcdi->logging_buffer; /* page-sized */ +#endif efx_dword_t hdr; efx->type->mcdi_read_response(efx, &hdr, 0, 4); @@ -223,6 +282,39 @@ static void efx_mcdi_read_response_header(struct efx_nic *efx) EFX_DWORD_FIELD(hdr, MC_CMD_V2_EXTN_IN_ACTUAL_LEN); } +#ifdef CONFIG_SFC_MCDI_LOGGING + if (mcdi->logging_enabled && !WARN_ON_ONCE(!buf)) { + size_t hdr_len, data_len; + int bytes = 0; + int i; + + WARN_ON_ONCE(mcdi->resp_hdr_len % 4); + hdr_len = mcdi->resp_hdr_len / 4; + /* MCDI_DECLARE_BUF ensures that underlying buffer is padded + * to dword size, and the MCDI buffer is always dword size + */ + data_len = DIV_ROUND_UP(mcdi->resp_data_len, 4); + + /* We own the logging buffer, as only one MCDI can be in + * progress on a NIC at any one time. So no need for locking. + */ + for (i = 0; i < hdr_len && bytes < PAGE_SIZE; i++) { + efx->type->mcdi_read_response(efx, &hdr, (i * 4), 4); + bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, + " %08x", le32_to_cpu(hdr.u32[0])); + } + + for (i = 0; i < data_len && bytes < PAGE_SIZE; i++) { + efx->type->mcdi_read_response(efx, &hdr, + mcdi->resp_hdr_len + (i * 4), 4); + bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, + " %08x", le32_to_cpu(hdr.u32[0])); + } + + netif_info(efx, hw, efx->net_dev, "MCDI RPC RESP:%s\n", buf); + } +#endif + if (error && mcdi->resp_data_len == 0) { netif_err(efx, hw, efx->net_dev, "MC rebooted\n"); mcdi->resprc = -EIO; @@ -406,7 +498,7 @@ static bool efx_mcdi_complete_async(struct efx_mcdi_iface *mcdi, bool timeout) struct efx_mcdi_async_param *async; size_t hdr_len, data_len, err_len; efx_dword_t *outbuf; - MCDI_DECLARE_BUF_OUT_OR_ERR(errbuf, 0); + MCDI_DECLARE_BUF_ERR(errbuf); int rc; if (cmpxchg(&mcdi->state, @@ -534,7 +626,7 @@ static int _efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen, size_t *outlen_actual, bool quiet) { struct efx_mcdi_iface *mcdi = efx_mcdi(efx); - MCDI_DECLARE_BUF_OUT_OR_ERR(errbuf, 0); + MCDI_DECLARE_BUF_ERR(errbuf); int rc; if (mcdi->mode == MCDI_MODE_POLL) @@ -936,10 +1028,21 @@ static void efx_mcdi_ev_death(struct efx_nic *efx, int rc) /* Consume the status word since efx_mcdi_rpc_finish() won't */ for (count = 0; count < MCDI_STATUS_DELAY_COUNT; ++count) { - if (efx_mcdi_poll_reboot(efx)) + rc = efx_mcdi_poll_reboot(efx); + if (rc) break; udelay(MCDI_STATUS_DELAY_US); } + + /* On EF10, a CODE_MC_REBOOT event can be received without the + * reboot detection in efx_mcdi_poll_reboot() being triggered. + * If zero was returned from the final call to + * efx_mcdi_poll_reboot(), the MC reboot wasn't noticed but the + * MC has definitely rebooted so prepare for the reset. + */ + if (!rc && efx->type->mcdi_reboot_detected) + efx->type->mcdi_reboot_detected(efx); + mcdi->new_epoch = true; /* Nobody was waiting for an MCDI request, so trigger a reset */ @@ -1035,7 +1138,9 @@ void efx_mcdi_process_event(struct efx_channel *channel, /* MAC stats are gather lazily. We can ignore this. */ break; case MCDI_EVENT_CODE_FLR: - efx_siena_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF)); + if (efx->type->sriov_flr) + efx->type->sriov_flr(efx, + MCDI_EVENT_FIELD(*event, FLR_VF)); break; case MCDI_EVENT_CODE_PTP_RX: case MCDI_EVENT_CODE_PTP_FAULT: @@ -1081,9 +1186,7 @@ void efx_mcdi_process_event(struct efx_channel *channel, void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len) { - MCDI_DECLARE_BUF(outbuf, - max(MC_CMD_GET_VERSION_OUT_LEN, - MC_CMD_GET_CAPABILITIES_OUT_LEN)); + MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_VERSION_OUT_LEN); size_t outlength; const __le16 *ver_words; size_t offset; @@ -1108,19 +1211,11 @@ void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len) * single version. Report which variants are running. */ if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) { - BUILD_BUG_ON(MC_CMD_GET_CAPABILITIES_IN_LEN != 0); - rc = efx_mcdi_rpc(efx, MC_CMD_GET_CAPABILITIES, NULL, 0, - outbuf, sizeof(outbuf), &outlength); - if (rc || outlength < MC_CMD_GET_CAPABILITIES_OUT_LEN) - offset += snprintf( - buf + offset, len - offset, " rx? tx?"); - else - offset += snprintf( - buf + offset, len - offset, " rx%x tx%x", - MCDI_WORD(outbuf, - GET_CAPABILITIES_OUT_RX_DPCPU_FW_ID), - MCDI_WORD(outbuf, - GET_CAPABILITIES_OUT_TX_DPCPU_FW_ID)); + struct efx_ef10_nic_data *nic_data = efx->nic_data; + + offset += snprintf(buf + offset, len - offset, " rx%x tx%x", + nic_data->rx_dpcpu_fw_id, + nic_data->tx_dpcpu_fw_id); /* It's theoretically possible for the string to exceed 31 * characters, though in practice the first three version @@ -1150,10 +1245,26 @@ static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating, MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_UPDATE, 1); MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_FIRMWARE_ID, MC_CMD_FW_LOW_LATENCY); - rc = efx_mcdi_rpc(efx, MC_CMD_DRV_ATTACH, inbuf, sizeof(inbuf), - outbuf, sizeof(outbuf), &outlen); - if (rc) + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_DRV_ATTACH, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + /* If we're not the primary PF, trying to ATTACH with a FIRMWARE_ID + * specified will fail with EPERM, and we have to tell the MC we don't + * care what firmware we get. + */ + if (rc == -EPERM) { + netif_dbg(efx, probe, efx->net_dev, + "efx_mcdi_drv_attach with fw-variant setting failed EPERM, trying without it\n"); + MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_FIRMWARE_ID, + MC_CMD_FW_DONT_CARE); + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_DRV_ATTACH, inbuf, + sizeof(inbuf), outbuf, sizeof(outbuf), + &outlen); + } + if (rc) { + efx_mcdi_display_error(efx, MC_CMD_DRV_ATTACH, sizeof(inbuf), + outbuf, outlen, rc); goto fail; + } if (outlen < MC_CMD_DRV_ATTACH_OUT_LEN) { rc = -EIO; goto fail; @@ -1178,16 +1289,6 @@ static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating, * and are completely trusted by firmware. Abort probing * if that's not true for this function. */ - if (driver_operating && - (efx->mcdi->fn_flags & - (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL | - 1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_TRUSTED)) != - (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL | - 1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_TRUSTED)) { - netif_err(efx, probe, efx->net_dev, - "This driver version only supports one function per port\n"); - return -ENODEV; - } if (was_attached != NULL) *was_attached = MCDI_DWORD(outbuf, DRV_ATTACH_OUT_OLD_STATE); @@ -1385,10 +1486,13 @@ fail1: return rc; } +/* Returns 1 if an assertion was read, 0 if no assertion had fired, + * negative on error. + */ static int efx_mcdi_read_assertion(struct efx_nic *efx) { MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_ASSERTS_IN_LEN); - MCDI_DECLARE_BUF_OUT_OR_ERR(outbuf, MC_CMD_GET_ASSERTS_OUT_LEN); + MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_ASSERTS_OUT_LEN); unsigned int flags, index; const char *reason; size_t outlen; @@ -1406,6 +1510,8 @@ static int efx_mcdi_read_assertion(struct efx_nic *efx) rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_ASSERTS, inbuf, MC_CMD_GET_ASSERTS_IN_LEN, outbuf, sizeof(outbuf), &outlen); + if (rc == -EPERM) + return 0; } while ((rc == -EINTR || rc == -EIO) && retry-- > 0); if (rc) { @@ -1443,24 +1549,31 @@ static int efx_mcdi_read_assertion(struct efx_nic *efx) MCDI_ARRAY_DWORD(outbuf, GET_ASSERTS_OUT_GP_REGS_OFFS, index)); - return 0; + return 1; } -static void efx_mcdi_exit_assertion(struct efx_nic *efx) +static int efx_mcdi_exit_assertion(struct efx_nic *efx) { MCDI_DECLARE_BUF(inbuf, MC_CMD_REBOOT_IN_LEN); + int rc; /* If the MC is running debug firmware, it might now be * waiting for a debugger to attach, but we just want it to * reboot. We set a flag that makes the command a no-op if it - * has already done so. We don't know what return code to - * expect (0 or -EIO), so ignore it. + * has already done so. + * The MCDI will thus return either 0 or -EIO. */ BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0); MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS, MC_CMD_REBOOT_FLAGS_AFTER_ASSERTION); - (void) efx_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf, MC_CMD_REBOOT_IN_LEN, - NULL, 0, NULL); + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_REBOOT, inbuf, MC_CMD_REBOOT_IN_LEN, + NULL, 0, NULL); + if (rc == -EIO) + rc = 0; + if (rc) + efx_mcdi_display_error(efx, MC_CMD_REBOOT, MC_CMD_REBOOT_IN_LEN, + NULL, 0, rc); + return rc; } int efx_mcdi_handle_assertion(struct efx_nic *efx) @@ -1468,12 +1581,10 @@ int efx_mcdi_handle_assertion(struct efx_nic *efx) int rc; rc = efx_mcdi_read_assertion(efx); - if (rc) + if (rc <= 0) return rc; - efx_mcdi_exit_assertion(efx); - - return 0; + return efx_mcdi_exit_assertion(efx); } void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode) @@ -1550,7 +1661,9 @@ int efx_mcdi_reset(struct efx_nic *efx, enum reset_type method) if (rc) return rc; - if (method == RESET_TYPE_WORLD) + if (method == RESET_TYPE_DATAPATH) + return 0; + else if (method == RESET_TYPE_WORLD) return efx_mcdi_reset_mc(efx); else return efx_mcdi_reset_func(efx); @@ -1677,15 +1790,65 @@ int efx_mcdi_wol_filter_reset(struct efx_nic *efx) return rc; } -int efx_mcdi_set_workaround(struct efx_nic *efx, u32 type, bool enabled) +int efx_mcdi_set_workaround(struct efx_nic *efx, u32 type, bool enabled, + unsigned int *flags) { MCDI_DECLARE_BUF(inbuf, MC_CMD_WORKAROUND_IN_LEN); + MCDI_DECLARE_BUF(outbuf, MC_CMD_WORKAROUND_EXT_OUT_LEN); + size_t outlen; + int rc; BUILD_BUG_ON(MC_CMD_WORKAROUND_OUT_LEN != 0); MCDI_SET_DWORD(inbuf, WORKAROUND_IN_TYPE, type); MCDI_SET_DWORD(inbuf, WORKAROUND_IN_ENABLED, enabled); - return efx_mcdi_rpc(efx, MC_CMD_WORKAROUND, inbuf, sizeof(inbuf), - NULL, 0, NULL); + rc = efx_mcdi_rpc(efx, MC_CMD_WORKAROUND, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + + if (!flags) + return 0; + + if (outlen >= MC_CMD_WORKAROUND_EXT_OUT_LEN) + *flags = MCDI_DWORD(outbuf, WORKAROUND_EXT_OUT_FLAGS); + else + *flags = 0; + + return 0; +} + +int efx_mcdi_get_workarounds(struct efx_nic *efx, unsigned int *impl_out, + unsigned int *enabled_out) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_WORKAROUNDS_OUT_LEN); + size_t outlen; + int rc; + + rc = efx_mcdi_rpc(efx, MC_CMD_GET_WORKAROUNDS, NULL, 0, + outbuf, sizeof(outbuf), &outlen); + if (rc) + goto fail; + + if (outlen < MC_CMD_GET_WORKAROUNDS_OUT_LEN) { + rc = -EIO; + goto fail; + } + + if (impl_out) + *impl_out = MCDI_DWORD(outbuf, GET_WORKAROUNDS_OUT_IMPLEMENTED); + + if (enabled_out) + *enabled_out = MCDI_DWORD(outbuf, GET_WORKAROUNDS_OUT_ENABLED); + + return 0; + +fail: + /* Older firmware lacks GET_WORKAROUNDS and this isn't especially + * terrifying. The call site will have to deal with it though. + */ + netif_printk(efx, hw, rc == -ENOSYS ? KERN_DEBUG : KERN_ERR, + efx->net_dev, "%s: failed rc=%d\n", __func__, rc); + return rc; } #ifdef CONFIG_SFC_MTD |