diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/prestera/prestera_pci.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/prestera/prestera_pci.c | 104 |
1 files changed, 81 insertions, 23 deletions
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c index 298110119272..a250d394da38 100644 --- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c +++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* Copyright (c) 2019-2020 Marvell International Ltd. All rights reserved */ +#include <linux/bitfield.h> #include <linux/circ_buf.h> #include <linux/device.h> #include <linux/firmware.h> @@ -13,9 +14,12 @@ #define PRESTERA_MSG_MAX_SIZE 1500 -#define PRESTERA_SUPP_FW_MAJ_VER 2 +#define PRESTERA_SUPP_FW_MAJ_VER 3 #define PRESTERA_SUPP_FW_MIN_VER 0 +#define PRESTERA_PREV_FW_MAJ_VER 2 +#define PRESTERA_PREV_FW_MIN_VER 0 + #define PRESTERA_FW_PATH_FMT "mrvl/prestera/mvsw_prestera_fw-v%u.%u.img" #define PRESTERA_FW_HDR_MAGIC 0x351D9D06 @@ -144,6 +148,11 @@ struct prestera_fw_regs { /* PRESTERA_CMD_RCV_CTL_REG flags */ #define PRESTERA_CMD_F_REPL_SENT BIT(0) +#define PRESTERA_FW_EVT_CTL_STATUS_MASK GENMASK(1, 0) + +#define PRESTERA_FW_EVT_CTL_STATUS_ON 0 +#define PRESTERA_FW_EVT_CTL_STATUS_OFF 1 + #define PRESTERA_EVTQ_REG_OFFSET(q, f) \ (PRESTERA_FW_REG_OFFSET(evtq_list) + \ (q) * sizeof(struct prestera_fw_evtq_regs) + \ @@ -166,6 +175,8 @@ struct prestera_fw_evtq { }; struct prestera_fw { + struct prestera_fw_rev rev_supp; + const struct firmware *bin; struct workqueue_struct *wq; struct prestera_device dev; u8 __iomem *ldr_regs; @@ -260,6 +271,15 @@ static u8 prestera_fw_evtq_pick(struct prestera_fw *fw) return PRESTERA_EVT_QNUM_MAX; } +static void prestera_fw_evt_ctl_status_set(struct prestera_fw *fw, u32 val) +{ + u32 status = prestera_fw_read(fw, PRESTERA_FW_STATUS_REG); + + u32p_replace_bits(&status, val, PRESTERA_FW_EVT_CTL_STATUS_MASK); + + prestera_fw_write(fw, PRESTERA_FW_STATUS_REG, status); +} + static void prestera_fw_evt_work_fn(struct work_struct *work) { struct prestera_fw *fw; @@ -269,6 +289,8 @@ static void prestera_fw_evt_work_fn(struct work_struct *work) fw = container_of(work, struct prestera_fw, evt_work); msg = fw->evt_msg; + prestera_fw_evt_ctl_status_set(fw, PRESTERA_FW_EVT_CTL_STATUS_OFF); + while ((qid = prestera_fw_evtq_pick(fw)) < PRESTERA_EVT_QNUM_MAX) { u32 idx; u32 len; @@ -288,6 +310,8 @@ static void prestera_fw_evt_work_fn(struct work_struct *work) if (fw->dev.recv_msg) fw->dev.recv_msg(&fw->dev, msg, len); } + + prestera_fw_evt_ctl_status_set(fw, PRESTERA_FW_EVT_CTL_STATUS_ON); } static int prestera_fw_wait_reg32(struct prestera_fw *fw, u32 reg, u32 cmp, @@ -576,25 +600,24 @@ static void prestera_fw_rev_parse(const struct prestera_fw_header *hdr, static int prestera_fw_rev_check(struct prestera_fw *fw) { struct prestera_fw_rev *rev = &fw->dev.fw_rev; - u16 maj_supp = PRESTERA_SUPP_FW_MAJ_VER; - u16 min_supp = PRESTERA_SUPP_FW_MIN_VER; - if (rev->maj == maj_supp && rev->min >= min_supp) + if (rev->maj == fw->rev_supp.maj && rev->min >= fw->rev_supp.min) return 0; dev_err(fw->dev.dev, "Driver supports FW version only '%u.%u.x'", - PRESTERA_SUPP_FW_MAJ_VER, PRESTERA_SUPP_FW_MIN_VER); + fw->rev_supp.maj, fw->rev_supp.min); return -EINVAL; } -static int prestera_fw_hdr_parse(struct prestera_fw *fw, - const struct firmware *img) +static int prestera_fw_hdr_parse(struct prestera_fw *fw) { - struct prestera_fw_header *hdr = (struct prestera_fw_header *)img->data; struct prestera_fw_rev *rev = &fw->dev.fw_rev; + struct prestera_fw_header *hdr; u32 magic; + hdr = (struct prestera_fw_header *)fw->bin->data; + magic = be32_to_cpu(hdr->magic_number); if (magic != PRESTERA_FW_HDR_MAGIC) { dev_err(fw->dev.dev, "FW img hdr magic is invalid"); @@ -609,11 +632,52 @@ static int prestera_fw_hdr_parse(struct prestera_fw *fw, return prestera_fw_rev_check(fw); } +static int prestera_fw_get(struct prestera_fw *fw) +{ + int ver_maj = PRESTERA_SUPP_FW_MAJ_VER; + int ver_min = PRESTERA_SUPP_FW_MIN_VER; + char fw_path[128]; + int err; + +pick_fw_ver: + snprintf(fw_path, sizeof(fw_path), PRESTERA_FW_PATH_FMT, + ver_maj, ver_min); + + err = request_firmware_direct(&fw->bin, fw_path, fw->dev.dev); + if (err) { + if (ver_maj == PRESTERA_SUPP_FW_MAJ_VER) { + ver_maj = PRESTERA_PREV_FW_MAJ_VER; + ver_min = PRESTERA_PREV_FW_MIN_VER; + + dev_warn(fw->dev.dev, + "missing latest %s firmware, fall-back to previous %u.%u version\n", + fw_path, ver_maj, ver_min); + + goto pick_fw_ver; + } else { + dev_err(fw->dev.dev, "failed to request previous firmware: %s\n", + fw_path); + return err; + } + } + + dev_info(fw->dev.dev, "Loading %s ...", fw_path); + + fw->rev_supp.maj = ver_maj; + fw->rev_supp.min = ver_min; + fw->rev_supp.sub = 0; + + return 0; +} + +static void prestera_fw_put(struct prestera_fw *fw) +{ + release_firmware(fw->bin); +} + static int prestera_fw_load(struct prestera_fw *fw) { size_t hlen = sizeof(struct prestera_fw_header); - const struct firmware *f; - char fw_path[128]; int err; err = prestera_ldr_wait_reg32(fw, PRESTERA_LDR_READY_REG, @@ -632,30 +696,24 @@ static int prestera_fw_load(struct prestera_fw *fw) fw->ldr_wr_idx = 0; - snprintf(fw_path, sizeof(fw_path), PRESTERA_FW_PATH_FMT, - PRESTERA_SUPP_FW_MAJ_VER, PRESTERA_SUPP_FW_MIN_VER); - - err = request_firmware_direct(&f, fw_path, fw->dev.dev); - if (err) { - dev_err(fw->dev.dev, "failed to request firmware file\n"); + err = prestera_fw_get(fw); + if (err) return err; - } - err = prestera_fw_hdr_parse(fw, f); + err = prestera_fw_hdr_parse(fw); if (err) { dev_err(fw->dev.dev, "FW image header is invalid\n"); goto out_release; } - prestera_ldr_write(fw, PRESTERA_LDR_IMG_SIZE_REG, f->size - hlen); + prestera_ldr_write(fw, PRESTERA_LDR_IMG_SIZE_REG, fw->bin->size - hlen); prestera_ldr_write(fw, PRESTERA_LDR_CTL_REG, PRESTERA_LDR_CTL_DL_START); - dev_info(fw->dev.dev, "Loading %s ...", fw_path); - - err = prestera_ldr_fw_send(fw, f->data + hlen, f->size - hlen); + err = prestera_ldr_fw_send(fw, fw->bin->data + hlen, + fw->bin->size - hlen); out_release: - release_firmware(f); + prestera_fw_put(fw); return err; } |