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-rw-r--r--drivers/misc/bcm-vk/bcm_vk.h549
1 files changed, 549 insertions, 0 deletions
diff --git a/drivers/misc/bcm-vk/bcm_vk.h b/drivers/misc/bcm-vk/bcm_vk.h
new file mode 100644
index 000000000..25d51222e
--- /dev/null
+++ b/drivers/misc/bcm-vk/bcm_vk.h
@@ -0,0 +1,549 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2018-2020 Broadcom.
+ */
+
+#ifndef BCM_VK_H
+#define BCM_VK_H
+
+#include <linux/atomic.h>
+#include <linux/firmware.h>
+#include <linux/irq.h>
+#include <linux/kref.h>
+#include <linux/miscdevice.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/sched/signal.h>
+#include <linux/tty.h>
+#include <linux/uaccess.h>
+#include <uapi/linux/misc/bcm_vk.h>
+
+#include "bcm_vk_msg.h"
+
+#define DRV_MODULE_NAME "bcm-vk"
+
+/*
+ * Load Image is completed in two stages:
+ *
+ * 1) When the VK device boot-up, M7 CPU runs and executes the BootROM.
+ * The Secure Boot Loader (SBL) as part of the BootROM will run
+ * to open up ITCM for host to push BOOT1 image.
+ * SBL will authenticate the image before jumping to BOOT1 image.
+ *
+ * 2) Because BOOT1 image is a secured image, we also called it the
+ * Secure Boot Image (SBI). At second stage, SBI will initialize DDR
+ * and wait for host to push BOOT2 image to DDR.
+ * SBI will authenticate the image before jumping to BOOT2 image.
+ *
+ */
+/* Location of registers of interest in BAR0 */
+
+/* Request register for Secure Boot Loader (SBL) download */
+#define BAR_CODEPUSH_SBL 0x400
+/* Start of ITCM */
+#define CODEPUSH_BOOT1_ENTRY 0x00400000
+#define CODEPUSH_MASK 0xfffff000
+#define CODEPUSH_BOOTSTART BIT(0)
+
+/* Boot Status register */
+#define BAR_BOOT_STATUS 0x404
+
+#define SRAM_OPEN BIT(16)
+#define DDR_OPEN BIT(17)
+
+/* Firmware loader progress status definitions */
+#define FW_LOADER_ACK_SEND_MORE_DATA BIT(18)
+#define FW_LOADER_ACK_IN_PROGRESS BIT(19)
+#define FW_LOADER_ACK_RCVD_ALL_DATA BIT(20)
+
+/* Boot1/2 is running in standalone mode */
+#define BOOT_STDALONE_RUNNING BIT(21)
+
+/* definitions for boot status register */
+#define BOOT_STATE_MASK (0xffffffff & \
+ ~(FW_LOADER_ACK_SEND_MORE_DATA | \
+ FW_LOADER_ACK_IN_PROGRESS | \
+ BOOT_STDALONE_RUNNING))
+
+#define BOOT_ERR_SHIFT 4
+#define BOOT_ERR_MASK (0xf << BOOT_ERR_SHIFT)
+#define BOOT_PROG_MASK 0xf
+
+#define BROM_STATUS_NOT_RUN 0x2
+#define BROM_NOT_RUN (SRAM_OPEN | BROM_STATUS_NOT_RUN)
+#define BROM_STATUS_COMPLETE 0x6
+#define BROM_RUNNING (SRAM_OPEN | BROM_STATUS_COMPLETE)
+#define BOOT1_STATUS_COMPLETE 0x6
+#define BOOT1_RUNNING (DDR_OPEN | BOOT1_STATUS_COMPLETE)
+#define BOOT2_STATUS_COMPLETE 0x6
+#define BOOT2_RUNNING (FW_LOADER_ACK_RCVD_ALL_DATA | \
+ BOOT2_STATUS_COMPLETE)
+
+/* Boot request for Secure Boot Image (SBI) */
+#define BAR_CODEPUSH_SBI 0x408
+/* 64M mapped to BAR2 */
+#define CODEPUSH_BOOT2_ENTRY 0x60000000
+
+#define BAR_CARD_STATUS 0x410
+/* CARD_STATUS definitions */
+#define CARD_STATUS_TTYVK0_READY BIT(0)
+#define CARD_STATUS_TTYVK1_READY BIT(1)
+
+#define BAR_BOOT1_STDALONE_PROGRESS 0x420
+#define BOOT1_STDALONE_SUCCESS (BIT(13) | BIT(14))
+#define BOOT1_STDALONE_PROGRESS_MASK BOOT1_STDALONE_SUCCESS
+
+#define BAR_METADATA_VERSION 0x440
+#define BAR_OS_UPTIME 0x444
+#define BAR_CHIP_ID 0x448
+#define MAJOR_SOC_REV(_chip_id) (((_chip_id) >> 20) & 0xf)
+
+#define BAR_CARD_TEMPERATURE 0x45c
+/* defines for all temperature sensor */
+#define BCM_VK_TEMP_FIELD_MASK 0xff
+#define BCM_VK_CPU_TEMP_SHIFT 0
+#define BCM_VK_DDR0_TEMP_SHIFT 8
+#define BCM_VK_DDR1_TEMP_SHIFT 16
+
+#define BAR_CARD_VOLTAGE 0x460
+/* defines for voltage rail conversion */
+#define BCM_VK_VOLT_RAIL_MASK 0xffff
+#define BCM_VK_3P3_VOLT_REG_SHIFT 16
+
+#define BAR_CARD_ERR_LOG 0x464
+/* Error log register bit definition - register for error alerts */
+#define ERR_LOG_UECC BIT(0)
+#define ERR_LOG_SSIM_BUSY BIT(1)
+#define ERR_LOG_AFBC_BUSY BIT(2)
+#define ERR_LOG_HIGH_TEMP_ERR BIT(3)
+#define ERR_LOG_WDOG_TIMEOUT BIT(4)
+#define ERR_LOG_SYS_FAULT BIT(5)
+#define ERR_LOG_RAMDUMP BIT(6)
+#define ERR_LOG_COP_WDOG_TIMEOUT BIT(7)
+/* warnings */
+#define ERR_LOG_MEM_ALLOC_FAIL BIT(8)
+#define ERR_LOG_LOW_TEMP_WARN BIT(9)
+#define ERR_LOG_ECC BIT(10)
+#define ERR_LOG_IPC_DWN BIT(11)
+
+/* Alert bit definitions detectd on host */
+#define ERR_LOG_HOST_INTF_V_FAIL BIT(13)
+#define ERR_LOG_HOST_HB_FAIL BIT(14)
+#define ERR_LOG_HOST_PCIE_DWN BIT(15)
+
+#define BAR_CARD_ERR_MEM 0x468
+/* defines for mem err, all fields have same width */
+#define BCM_VK_MEM_ERR_FIELD_MASK 0xff
+#define BCM_VK_ECC_MEM_ERR_SHIFT 0
+#define BCM_VK_UECC_MEM_ERR_SHIFT 8
+/* threshold of event occurrence and logs start to come out */
+#define BCM_VK_ECC_THRESHOLD 10
+#define BCM_VK_UECC_THRESHOLD 1
+
+#define BAR_CARD_PWR_AND_THRE 0x46c
+/* defines for power and temp threshold, all fields have same width */
+#define BCM_VK_PWR_AND_THRE_FIELD_MASK 0xff
+#define BCM_VK_LOW_TEMP_THRE_SHIFT 0
+#define BCM_VK_HIGH_TEMP_THRE_SHIFT 8
+#define BCM_VK_PWR_STATE_SHIFT 16
+
+#define BAR_CARD_STATIC_INFO 0x470
+
+#define BAR_INTF_VER 0x47c
+#define BAR_INTF_VER_MAJOR_SHIFT 16
+#define BAR_INTF_VER_MASK 0xffff
+/*
+ * major and minor semantic version numbers supported
+ * Please update as required on interface changes
+ */
+#define SEMANTIC_MAJOR 1
+#define SEMANTIC_MINOR 0
+
+/*
+ * first door bell reg, ie for queue = 0. Only need the first one, as
+ * we will use the queue number to derive the others
+ */
+#define VK_BAR0_REGSEG_DB_BASE 0x484
+#define VK_BAR0_REGSEG_DB_REG_GAP 8 /*
+ * DB register gap,
+ * DB1 at 0x48c and DB2 at 0x494
+ */
+
+/* reset register and specific values */
+#define VK_BAR0_RESET_DB_NUM 3
+#define VK_BAR0_RESET_DB_SOFT 0xffffffff
+#define VK_BAR0_RESET_DB_HARD 0xfffffffd
+#define VK_BAR0_RESET_RAMPDUMP 0xa0000000
+
+#define VK_BAR0_Q_DB_BASE(q_num) (VK_BAR0_REGSEG_DB_BASE + \
+ ((q_num) * VK_BAR0_REGSEG_DB_REG_GAP))
+#define VK_BAR0_RESET_DB_BASE (VK_BAR0_REGSEG_DB_BASE + \
+ (VK_BAR0_RESET_DB_NUM * VK_BAR0_REGSEG_DB_REG_GAP))
+
+#define BAR_BOOTSRC_SELECT 0xc78
+/* BOOTSRC definitions */
+#define BOOTSRC_SOFT_ENABLE BIT(14)
+
+/* Card OS Firmware version size */
+#define BAR_FIRMWARE_TAG_SIZE 50
+#define FIRMWARE_STATUS_PRE_INIT_DONE 0x1f
+
+/* VK MSG_ID defines */
+#define VK_MSG_ID_BITMAP_SIZE 4096
+#define VK_MSG_ID_BITMAP_MASK (VK_MSG_ID_BITMAP_SIZE - 1)
+#define VK_MSG_ID_OVERFLOW 0xffff
+
+/*
+ * BAR1
+ */
+
+/* BAR1 message q definition */
+
+/* indicate if msgq ctrl in BAR1 is populated */
+#define VK_BAR1_MSGQ_DEF_RDY 0x60c0
+/* ready marker value for the above location, normal boot2 */
+#define VK_BAR1_MSGQ_RDY_MARKER 0xbeefcafe
+/* ready marker value for the above location, normal boot2 */
+#define VK_BAR1_DIAG_RDY_MARKER 0xdeadcafe
+/* number of msgqs in BAR1 */
+#define VK_BAR1_MSGQ_NR 0x60c4
+/* BAR1 queue control structure offset */
+#define VK_BAR1_MSGQ_CTRL_OFF 0x60c8
+
+/* BAR1 ucode and boot1 version tag */
+#define VK_BAR1_UCODE_VER_TAG 0x6170
+#define VK_BAR1_BOOT1_VER_TAG 0x61b0
+#define VK_BAR1_VER_TAG_SIZE 64
+
+/* Memory to hold the DMA buffer memory address allocated for boot2 download */
+#define VK_BAR1_DMA_BUF_OFF_HI 0x61e0
+#define VK_BAR1_DMA_BUF_OFF_LO (VK_BAR1_DMA_BUF_OFF_HI + 4)
+#define VK_BAR1_DMA_BUF_SZ (VK_BAR1_DMA_BUF_OFF_HI + 8)
+
+/* Scratch memory allocated on host for VK */
+#define VK_BAR1_SCRATCH_OFF_HI 0x61f0
+#define VK_BAR1_SCRATCH_OFF_LO (VK_BAR1_SCRATCH_OFF_HI + 4)
+#define VK_BAR1_SCRATCH_SZ_ADDR (VK_BAR1_SCRATCH_OFF_HI + 8)
+#define VK_BAR1_SCRATCH_DEF_NR_PAGES 32
+
+/* BAR1 DAUTH info */
+#define VK_BAR1_DAUTH_BASE_ADDR 0x6200
+#define VK_BAR1_DAUTH_STORE_SIZE 0x48
+#define VK_BAR1_DAUTH_VALID_SIZE 0x8
+#define VK_BAR1_DAUTH_MAX 4
+#define VK_BAR1_DAUTH_STORE_ADDR(x) \
+ (VK_BAR1_DAUTH_BASE_ADDR + \
+ (x) * (VK_BAR1_DAUTH_STORE_SIZE + VK_BAR1_DAUTH_VALID_SIZE))
+#define VK_BAR1_DAUTH_VALID_ADDR(x) \
+ (VK_BAR1_DAUTH_STORE_ADDR(x) + VK_BAR1_DAUTH_STORE_SIZE)
+
+/* BAR1 SOTP AUTH and REVID info */
+#define VK_BAR1_SOTP_REVID_BASE_ADDR 0x6340
+#define VK_BAR1_SOTP_REVID_SIZE 0x10
+#define VK_BAR1_SOTP_REVID_MAX 2
+#define VK_BAR1_SOTP_REVID_ADDR(x) \
+ (VK_BAR1_SOTP_REVID_BASE_ADDR + (x) * VK_BAR1_SOTP_REVID_SIZE)
+
+/* VK device supports a maximum of 3 bars */
+#define MAX_BAR 3
+
+/* default number of msg blk for inband SGL */
+#define BCM_VK_DEF_IB_SGL_BLK_LEN 16
+#define BCM_VK_IB_SGL_BLK_MAX 24
+
+enum pci_barno {
+ BAR_0 = 0,
+ BAR_1,
+ BAR_2
+};
+
+#ifdef CONFIG_BCM_VK_TTY
+#define BCM_VK_NUM_TTY 2
+#else
+#define BCM_VK_NUM_TTY 0
+#endif
+
+struct bcm_vk_tty {
+ struct tty_port port;
+ u32 to_offset; /* bar offset to use */
+ u32 to_size; /* to VK buffer size */
+ u32 wr; /* write offset shadow */
+ u32 from_offset; /* bar offset to use */
+ u32 from_size; /* from VK buffer size */
+ u32 rd; /* read offset shadow */
+ pid_t pid;
+ bool irq_enabled;
+ bool is_opened; /* tracks tty open/close */
+};
+
+/* VK device max power state, supports 3, full, reduced and low */
+#define MAX_OPP 3
+#define MAX_CARD_INFO_TAG_SIZE 64
+
+struct bcm_vk_card_info {
+ u32 version;
+ char os_tag[MAX_CARD_INFO_TAG_SIZE];
+ char cmpt_tag[MAX_CARD_INFO_TAG_SIZE];
+ u32 cpu_freq_mhz;
+ u32 cpu_scale[MAX_OPP];
+ u32 ddr_freq_mhz;
+ u32 ddr_size_MB;
+ u32 video_core_freq_mhz;
+};
+
+/* DAUTH related info */
+struct bcm_vk_dauth_key {
+ char store[VK_BAR1_DAUTH_STORE_SIZE];
+ char valid[VK_BAR1_DAUTH_VALID_SIZE];
+};
+
+struct bcm_vk_dauth_info {
+ struct bcm_vk_dauth_key keys[VK_BAR1_DAUTH_MAX];
+};
+
+/*
+ * Control structure of logging messages from the card. This
+ * buffer is for logmsg that comes from vk
+ */
+struct bcm_vk_peer_log {
+ u32 rd_idx;
+ u32 wr_idx;
+ u32 buf_size;
+ u32 mask;
+ char data[];
+};
+
+/* max buf size allowed */
+#define BCM_VK_PEER_LOG_BUF_MAX SZ_16K
+/* max size per line of peer log */
+#define BCM_VK_PEER_LOG_LINE_MAX 256
+
+/*
+ * single entry for processing type + utilization
+ */
+#define BCM_VK_PROC_TYPE_TAG_LEN 8
+struct bcm_vk_proc_mon_entry_t {
+ char tag[BCM_VK_PROC_TYPE_TAG_LEN];
+ u32 used;
+ u32 max; /**< max capacity */
+};
+
+/**
+ * Structure for run time utilization
+ */
+#define BCM_VK_PROC_MON_MAX 8 /* max entries supported */
+struct bcm_vk_proc_mon_info {
+ u32 num; /**< no of entries */
+ u32 entry_size; /**< per entry size */
+ struct bcm_vk_proc_mon_entry_t entries[BCM_VK_PROC_MON_MAX];
+};
+
+struct bcm_vk_hb_ctrl {
+ struct timer_list timer;
+ u32 last_uptime;
+ u32 lost_cnt;
+};
+
+struct bcm_vk_alert {
+ u16 flags;
+ u16 notfs;
+};
+
+/* some alert counters that the driver will keep track */
+struct bcm_vk_alert_cnts {
+ u16 ecc;
+ u16 uecc;
+};
+
+struct bcm_vk {
+ struct pci_dev *pdev;
+ void __iomem *bar[MAX_BAR];
+ int num_irqs;
+
+ struct bcm_vk_card_info card_info;
+ struct bcm_vk_proc_mon_info proc_mon_info;
+ struct bcm_vk_dauth_info dauth_info;
+
+ /* mutex to protect the ioctls */
+ struct mutex mutex;
+ struct miscdevice miscdev;
+ int devid; /* dev id allocated */
+
+#ifdef CONFIG_BCM_VK_TTY
+ struct tty_driver *tty_drv;
+ struct timer_list serial_timer;
+ struct bcm_vk_tty tty[BCM_VK_NUM_TTY];
+ struct workqueue_struct *tty_wq_thread;
+ struct work_struct tty_wq_work;
+#endif
+
+ /* Reference-counting to handle file operations */
+ struct kref kref;
+
+ spinlock_t msg_id_lock; /* Spinlock for msg_id */
+ u16 msg_id;
+ DECLARE_BITMAP(bmap, VK_MSG_ID_BITMAP_SIZE);
+ spinlock_t ctx_lock; /* Spinlock for component context */
+ struct bcm_vk_ctx ctx[VK_CMPT_CTX_MAX];
+ struct bcm_vk_ht_entry pid_ht[VK_PID_HT_SZ];
+ pid_t reset_pid; /* process that issue reset */
+
+ atomic_t msgq_inited; /* indicate if info has been synced with vk */
+ struct bcm_vk_msg_chan to_v_msg_chan;
+ struct bcm_vk_msg_chan to_h_msg_chan;
+
+ struct workqueue_struct *wq_thread;
+ struct work_struct wq_work; /* work queue for deferred job */
+ unsigned long wq_offload[1]; /* various flags on wq requested */
+ void *tdma_vaddr; /* test dma segment virtual addr */
+ dma_addr_t tdma_addr; /* test dma segment bus addr */
+
+ struct notifier_block panic_nb;
+ u32 ib_sgl_size; /* size allocated for inband sgl insertion */
+
+ /* heart beat mechanism control structure */
+ struct bcm_vk_hb_ctrl hb_ctrl;
+ /* house-keeping variable of error logs */
+ spinlock_t host_alert_lock; /* protection to access host_alert struct */
+ struct bcm_vk_alert host_alert;
+ struct bcm_vk_alert peer_alert; /* bits set by the card */
+ struct bcm_vk_alert_cnts alert_cnts;
+
+ /* offset of the peer log control in BAR2 */
+ u32 peerlog_off;
+ struct bcm_vk_peer_log peerlog_info; /* record of peer log info */
+ /* offset of processing monitoring info in BAR2 */
+ u32 proc_mon_off;
+};
+
+/* wq offload work items bits definitions */
+enum bcm_vk_wq_offload_flags {
+ BCM_VK_WQ_DWNLD_PEND = 0,
+ BCM_VK_WQ_DWNLD_AUTO = 1,
+ BCM_VK_WQ_NOTF_PEND = 2,
+};
+
+/* a macro to get an individual field with mask and shift */
+#define BCM_VK_EXTRACT_FIELD(_field, _reg, _mask, _shift) \
+ (_field = (((_reg) >> (_shift)) & (_mask)))
+
+struct bcm_vk_entry {
+ const u32 mask;
+ const u32 exp_val;
+ const char *str;
+};
+
+/* alerts that could be generated from peer */
+#define BCM_VK_PEER_ERR_NUM 12
+extern struct bcm_vk_entry const bcm_vk_peer_err[BCM_VK_PEER_ERR_NUM];
+/* alerts detected by the host */
+#define BCM_VK_HOST_ERR_NUM 3
+extern struct bcm_vk_entry const bcm_vk_host_err[BCM_VK_HOST_ERR_NUM];
+
+/*
+ * check if PCIe interface is down on read. Use it when it is
+ * certain that _val should never be all ones.
+ */
+#define BCM_VK_INTF_IS_DOWN(val) ((val) == 0xffffffff)
+
+static inline u32 vkread32(struct bcm_vk *vk, enum pci_barno bar, u64 offset)
+{
+ return readl(vk->bar[bar] + offset);
+}
+
+static inline void vkwrite32(struct bcm_vk *vk,
+ u32 value,
+ enum pci_barno bar,
+ u64 offset)
+{
+ writel(value, vk->bar[bar] + offset);
+}
+
+static inline u8 vkread8(struct bcm_vk *vk, enum pci_barno bar, u64 offset)
+{
+ return readb(vk->bar[bar] + offset);
+}
+
+static inline void vkwrite8(struct bcm_vk *vk,
+ u8 value,
+ enum pci_barno bar,
+ u64 offset)
+{
+ writeb(value, vk->bar[bar] + offset);
+}
+
+static inline bool bcm_vk_msgq_marker_valid(struct bcm_vk *vk)
+{
+ u32 rdy_marker = 0;
+ u32 fw_status;
+
+ fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
+
+ if ((fw_status & VK_FWSTS_READY) == VK_FWSTS_READY)
+ rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY);
+
+ return (rdy_marker == VK_BAR1_MSGQ_RDY_MARKER);
+}
+
+int bcm_vk_open(struct inode *inode, struct file *p_file);
+ssize_t bcm_vk_read(struct file *p_file, char __user *buf, size_t count,
+ loff_t *f_pos);
+ssize_t bcm_vk_write(struct file *p_file, const char __user *buf,
+ size_t count, loff_t *f_pos);
+__poll_t bcm_vk_poll(struct file *p_file, struct poll_table_struct *wait);
+int bcm_vk_release(struct inode *inode, struct file *p_file);
+void bcm_vk_release_data(struct kref *kref);
+irqreturn_t bcm_vk_msgq_irqhandler(int irq, void *dev_id);
+irqreturn_t bcm_vk_notf_irqhandler(int irq, void *dev_id);
+irqreturn_t bcm_vk_tty_irqhandler(int irq, void *dev_id);
+int bcm_vk_msg_init(struct bcm_vk *vk);
+void bcm_vk_msg_remove(struct bcm_vk *vk);
+void bcm_vk_drain_msg_on_reset(struct bcm_vk *vk);
+int bcm_vk_sync_msgq(struct bcm_vk *vk, bool force_sync);
+void bcm_vk_blk_drv_access(struct bcm_vk *vk);
+s32 bcm_to_h_msg_dequeue(struct bcm_vk *vk);
+int bcm_vk_send_shutdown_msg(struct bcm_vk *vk, u32 shut_type,
+ const pid_t pid, const u32 q_num);
+void bcm_to_v_q_doorbell(struct bcm_vk *vk, u32 q_num, u32 db_val);
+int bcm_vk_auto_load_all_images(struct bcm_vk *vk);
+void bcm_vk_hb_init(struct bcm_vk *vk);
+void bcm_vk_hb_deinit(struct bcm_vk *vk);
+void bcm_vk_handle_notf(struct bcm_vk *vk);
+bool bcm_vk_drv_access_ok(struct bcm_vk *vk);
+void bcm_vk_set_host_alert(struct bcm_vk *vk, u32 bit_mask);
+
+#ifdef CONFIG_BCM_VK_TTY
+int bcm_vk_tty_init(struct bcm_vk *vk, char *name);
+void bcm_vk_tty_exit(struct bcm_vk *vk);
+void bcm_vk_tty_terminate_tty_user(struct bcm_vk *vk);
+void bcm_vk_tty_wq_exit(struct bcm_vk *vk);
+
+static inline void bcm_vk_tty_set_irq_enabled(struct bcm_vk *vk, int index)
+{
+ vk->tty[index].irq_enabled = true;
+}
+#else
+static inline int bcm_vk_tty_init(struct bcm_vk *vk, char *name)
+{
+ return 0;
+}
+
+static inline void bcm_vk_tty_exit(struct bcm_vk *vk)
+{
+}
+
+static inline void bcm_vk_tty_terminate_tty_user(struct bcm_vk *vk)
+{
+}
+
+static inline void bcm_vk_tty_wq_exit(struct bcm_vk *vk)
+{
+}
+
+static inline void bcm_vk_tty_set_irq_enabled(struct bcm_vk *vk, int index)
+{
+}
+#endif /* CONFIG_BCM_VK_TTY */
+
+#endif