tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Intel MIC Platform Software Stack (MPSS)
4 *
5 * Copyright(c) 2013 Intel Corporation.
6 *
7 * Intel MIC Host driver.
8 */
9#ifndef _MIC_DEVICE_H_
10#define _MIC_DEVICE_H_
11
12#include <linux/cdev.h>
13#include <linux/idr.h>
14#include <linux/notifier.h>
15#include <linux/irqreturn.h>
16#include <linux/dmaengine.h>
17#include <linux/miscdevice.h>
18#include <linux/mic_bus.h>
19#include "../bus/scif_bus.h"
20#include "../bus/vop_bus.h"
21#include "../bus/cosm_bus.h"
22#include "mic_intr.h"
23
24/**
25 * enum mic_stepping - MIC stepping ids.
26 */
27enum mic_stepping {
28 MIC_A0_STEP = 0x0,
29 MIC_B0_STEP = 0x10,
30 MIC_B1_STEP = 0x11,
31 MIC_C0_STEP = 0x20,
32};
33
34extern struct cosm_hw_ops cosm_hw_ops;
35
36/**
37 * struct mic_device - MIC device information for each card.
38 *
39 * @mmio: MMIO bar information.
40 * @aper: Aperture bar information.
41 * @family: The MIC family to which this device belongs.
42 * @ops: MIC HW specific operations.
43 * @id: The unique device id for this MIC device.
44 * @stepping: Stepping ID.
45 * @pdev: Underlying PCI device.
46 * @mic_mutex: Mutex for synchronizing access to mic_device.
47 * @intr_ops: HW specific interrupt operations.
48 * @smpt_ops: Hardware specific SMPT operations.
49 * @smpt: MIC SMPT information.
50 * @intr_info: H/W specific interrupt information.
51 * @irq_info: The OS specific irq information
52 * @dbg_dir: debugfs directory of this MIC device.
53 * @bootaddr: MIC boot address.
54 * @dp: virtio device page
55 * @dp_dma_addr: virtio device page DMA address.
56 * @dma_mbdev: MIC BUS DMA device.
57 * @dma_ch - Array of DMA channels
58 * @num_dma_ch - Number of DMA channels available
59 * @scdev: SCIF device on the SCIF virtual bus.
60 * @vpdev: Virtio over PCIe device on the VOP virtual bus.
61 * @cosm_dev: COSM device
62 */
63struct mic_device {
64 struct mic_mw mmio;
65 struct mic_mw aper;
66 enum mic_hw_family family;
67 struct mic_hw_ops *ops;
68 int id;
69 enum mic_stepping stepping;
70 struct pci_dev *pdev;
71 struct mutex mic_mutex;
72 struct mic_hw_intr_ops *intr_ops;
73 struct mic_smpt_ops *smpt_ops;
74 struct mic_smpt_info *smpt;
75 struct mic_intr_info *intr_info;
76 struct mic_irq_info irq_info;
77 struct dentry *dbg_dir;
78 u32 bootaddr;
79 void *dp;
80 dma_addr_t dp_dma_addr;
81 struct mbus_device *dma_mbdev;
82 struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
83 int num_dma_ch;
84 struct scif_hw_dev *scdev;
85 struct vop_device *vpdev;
86 struct cosm_device *cosm_dev;
87};
88
89/**
90 * struct mic_hw_ops - MIC HW specific operations.
91 * @aper_bar: Aperture bar resource number.
92 * @mmio_bar: MMIO bar resource number.
93 * @read_spad: Read from scratch pad register.
94 * @write_spad: Write to scratch pad register.
95 * @send_intr: Send an interrupt for a particular doorbell on the card.
96 * @ack_interrupt: Hardware specific operations to ack the h/w on
97 * receipt of an interrupt.
98 * @intr_workarounds: Hardware specific workarounds needed after
99 * handling an interrupt.
100 * @reset: Reset the remote processor.
101 * @reset_fw_ready: Reset firmware ready field.
102 * @is_fw_ready: Check if firmware is ready for OS download.
103 * @send_firmware_intr: Send an interrupt to the card firmware.
104 * @load_mic_fw: Load firmware segments required to boot the card
105 * into card memory. This includes the kernel, command line, ramdisk etc.
106 * @get_postcode: Get post code status from firmware.
107 * @dma_filter: DMA filter function to be used.
108 */
109struct mic_hw_ops {
110 u8 aper_bar;
111 u8 mmio_bar;
112 u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
113 void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
114 void (*send_intr)(struct mic_device *mdev, int doorbell);
115 u32 (*ack_interrupt)(struct mic_device *mdev);
116 void (*intr_workarounds)(struct mic_device *mdev);
117 void (*reset)(struct mic_device *mdev);
118 void (*reset_fw_ready)(struct mic_device *mdev);
119 bool (*is_fw_ready)(struct mic_device *mdev);
120 void (*send_firmware_intr)(struct mic_device *mdev);
121 int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
122 u32 (*get_postcode)(struct mic_device *mdev);
123 bool (*dma_filter)(struct dma_chan *chan, void *param);
124};
125
126/**
127 * mic_mmio_read - read from an MMIO register.
128 * @mw: MMIO register base virtual address.
129 * @offset: register offset.
130 *
131 * RETURNS: register value.
132 */
133static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
134{
135 return ioread32(mw->va + offset);
136}
137
138/**
139 * mic_mmio_write - write to an MMIO register.
140 * @mw: MMIO register base virtual address.
141 * @val: the data value to put into the register
142 * @offset: register offset.
143 *
144 * RETURNS: none.
145 */
146static inline void
147mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
148{
149 iowrite32(val, mw->va + offset);
150}
151
152void mic_bootparam_init(struct mic_device *mdev);
153void mic_create_debug_dir(struct mic_device *dev);
154void mic_delete_debug_dir(struct mic_device *dev);
155void __init mic_init_debugfs(void);
156void mic_exit_debugfs(void);
157#endif