mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 23:47:39 +07:00
c9d5c53db9
Update mic_bootparam and define the maximum number of DMA channels Reviewed-by: Nikhil Rao <nikhil.rao@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
245 lines
6.7 KiB
C
245 lines
6.7 KiB
C
/*
|
|
* Intel MIC Platform Software Stack (MPSS)
|
|
*
|
|
* Copyright(c) 2013 Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* The full GNU General Public License is included in this distribution in
|
|
* the file called "COPYING".
|
|
*
|
|
* Intel MIC driver.
|
|
*
|
|
*/
|
|
#ifndef __MIC_COMMON_H_
|
|
#define __MIC_COMMON_H_
|
|
|
|
#include <linux/virtio_ring.h>
|
|
|
|
#define __mic_align(a, x) (((a) + (x) - 1) & ~((x) - 1))
|
|
|
|
/**
|
|
* struct mic_device_desc: Virtio device information shared between the
|
|
* virtio driver and userspace backend
|
|
*
|
|
* @type: Device type: console/network/disk etc. Type 0/-1 terminates.
|
|
* @num_vq: Number of virtqueues.
|
|
* @feature_len: Number of bytes of feature bits. Multiply by 2: one for
|
|
host features and one for guest acknowledgements.
|
|
* @config_len: Number of bytes of the config array after virtqueues.
|
|
* @status: A status byte, written by the Guest.
|
|
* @config: Start of the following variable length config.
|
|
*/
|
|
struct mic_device_desc {
|
|
__s8 type;
|
|
__u8 num_vq;
|
|
__u8 feature_len;
|
|
__u8 config_len;
|
|
__u8 status;
|
|
__le64 config[0];
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
/**
|
|
* struct mic_device_ctrl: Per virtio device information in the device page
|
|
* used internally by the host and card side drivers.
|
|
*
|
|
* @vdev: Used for storing MIC vdev information by the guest.
|
|
* @config_change: Set to 1 by host when a config change is requested.
|
|
* @vdev_reset: Set to 1 by guest to indicate virtio device has been reset.
|
|
* @guest_ack: Set to 1 by guest to ack a command.
|
|
* @host_ack: Set to 1 by host to ack a command.
|
|
* @used_address_updated: Set to 1 by guest when the used address should be
|
|
* updated.
|
|
* @c2h_vdev_db: The doorbell number to be used by guest. Set by host.
|
|
* @h2c_vdev_db: The doorbell number to be used by host. Set by guest.
|
|
*/
|
|
struct mic_device_ctrl {
|
|
__le64 vdev;
|
|
__u8 config_change;
|
|
__u8 vdev_reset;
|
|
__u8 guest_ack;
|
|
__u8 host_ack;
|
|
__u8 used_address_updated;
|
|
__s8 c2h_vdev_db;
|
|
__s8 h2c_vdev_db;
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
/**
|
|
* struct mic_bootparam: Virtio device independent information in device page
|
|
*
|
|
* @magic: A magic value used by the card to ensure it can see the host
|
|
* @c2h_shutdown_db: Card to Host shutdown doorbell set by host
|
|
* @h2c_shutdown_db: Host to Card shutdown doorbell set by card
|
|
* @h2c_config_db: Host to Card Virtio config doorbell set by card
|
|
* @shutdown_status: Card shutdown status set by card
|
|
* @shutdown_card: Set to 1 by the host when a card shutdown is initiated
|
|
* @tot_nodes: Total number of nodes in the SCIF network
|
|
* @node_id: Unique id of the node
|
|
* @h2c_scif_db - Host to card SCIF doorbell set by card
|
|
* @c2h_scif_db - Card to host SCIF doorbell set by host
|
|
* @scif_host_dma_addr - SCIF host queue pair DMA address
|
|
* @scif_card_dma_addr - SCIF card queue pair DMA address
|
|
*/
|
|
struct mic_bootparam {
|
|
__le32 magic;
|
|
__s8 c2h_shutdown_db;
|
|
__s8 h2c_shutdown_db;
|
|
__s8 h2c_config_db;
|
|
__u8 shutdown_status;
|
|
__u8 shutdown_card;
|
|
__u8 tot_nodes;
|
|
__u8 node_id;
|
|
__u8 h2c_scif_db;
|
|
__u8 c2h_scif_db;
|
|
__u64 scif_host_dma_addr;
|
|
__u64 scif_card_dma_addr;
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
/**
|
|
* struct mic_device_page: High level representation of the device page
|
|
*
|
|
* @bootparam: The bootparam structure is used for sharing information and
|
|
* status updates between MIC host and card drivers.
|
|
* @desc: Array of MIC virtio device descriptors.
|
|
*/
|
|
struct mic_device_page {
|
|
struct mic_bootparam bootparam;
|
|
struct mic_device_desc desc[0];
|
|
};
|
|
/**
|
|
* struct mic_vqconfig: This is how we expect the device configuration field
|
|
* for a virtqueue to be laid out in config space.
|
|
*
|
|
* @address: Guest/MIC physical address of the virtio ring
|
|
* (avail and desc rings)
|
|
* @used_address: Guest/MIC physical address of the used ring
|
|
* @num: The number of entries in the virtio_ring
|
|
*/
|
|
struct mic_vqconfig {
|
|
__le64 address;
|
|
__le64 used_address;
|
|
__le16 num;
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
/*
|
|
* The alignment to use between consumer and producer parts of vring.
|
|
* This is pagesize for historical reasons.
|
|
*/
|
|
#define MIC_VIRTIO_RING_ALIGN 4096
|
|
|
|
#define MIC_MAX_VRINGS 4
|
|
#define MIC_VRING_ENTRIES 128
|
|
|
|
/*
|
|
* Max vring entries (power of 2) to ensure desc and avail rings
|
|
* fit in a single page
|
|
*/
|
|
#define MIC_MAX_VRING_ENTRIES 128
|
|
|
|
/**
|
|
* Max size of the desc block in bytes: includes:
|
|
* - struct mic_device_desc
|
|
* - struct mic_vqconfig (num_vq of these)
|
|
* - host and guest features
|
|
* - virtio device config space
|
|
*/
|
|
#define MIC_MAX_DESC_BLK_SIZE 256
|
|
|
|
/**
|
|
* struct _mic_vring_info - Host vring info exposed to userspace backend
|
|
* for the avail index and magic for the card.
|
|
*
|
|
* @avail_idx: host avail idx
|
|
* @magic: A magic debug cookie.
|
|
*/
|
|
struct _mic_vring_info {
|
|
__u16 avail_idx;
|
|
__le32 magic;
|
|
};
|
|
|
|
/**
|
|
* struct mic_vring - Vring information.
|
|
*
|
|
* @vr: The virtio ring.
|
|
* @info: Host vring information exposed to the userspace backend for the
|
|
* avail index and magic for the card.
|
|
* @va: The va for the buffer allocated for vr and info.
|
|
* @len: The length of the buffer required for allocating vr and info.
|
|
*/
|
|
struct mic_vring {
|
|
struct vring vr;
|
|
struct _mic_vring_info *info;
|
|
void *va;
|
|
int len;
|
|
};
|
|
|
|
#define mic_aligned_desc_size(d) __mic_align(mic_desc_size(d), 8)
|
|
|
|
#ifndef INTEL_MIC_CARD
|
|
static inline unsigned mic_desc_size(const struct mic_device_desc *desc)
|
|
{
|
|
return sizeof(*desc) + desc->num_vq * sizeof(struct mic_vqconfig)
|
|
+ desc->feature_len * 2 + desc->config_len;
|
|
}
|
|
|
|
static inline struct mic_vqconfig *
|
|
mic_vq_config(const struct mic_device_desc *desc)
|
|
{
|
|
return (struct mic_vqconfig *)(desc + 1);
|
|
}
|
|
|
|
static inline __u8 *mic_vq_features(const struct mic_device_desc *desc)
|
|
{
|
|
return (__u8 *)(mic_vq_config(desc) + desc->num_vq);
|
|
}
|
|
|
|
static inline __u8 *mic_vq_configspace(const struct mic_device_desc *desc)
|
|
{
|
|
return mic_vq_features(desc) + desc->feature_len * 2;
|
|
}
|
|
static inline unsigned mic_total_desc_size(struct mic_device_desc *desc)
|
|
{
|
|
return mic_aligned_desc_size(desc) + sizeof(struct mic_device_ctrl);
|
|
}
|
|
#endif
|
|
|
|
/* Device page size */
|
|
#define MIC_DP_SIZE 4096
|
|
|
|
#define MIC_MAGIC 0xc0ffee00
|
|
|
|
/**
|
|
* enum mic_states - MIC states.
|
|
*/
|
|
enum mic_states {
|
|
MIC_OFFLINE = 0,
|
|
MIC_ONLINE,
|
|
MIC_SHUTTING_DOWN,
|
|
MIC_RESET_FAILED,
|
|
MIC_SUSPENDING,
|
|
MIC_SUSPENDED,
|
|
MIC_LAST
|
|
};
|
|
|
|
/**
|
|
* enum mic_status - MIC status reported by card after
|
|
* a host or card initiated shutdown or a card crash.
|
|
*/
|
|
enum mic_status {
|
|
MIC_NOP = 0,
|
|
MIC_CRASHED,
|
|
MIC_HALTED,
|
|
MIC_POWER_OFF,
|
|
MIC_RESTART,
|
|
MIC_STATUS_LAST
|
|
};
|
|
|
|
#endif
|