1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(C) 2019 Marvell International Ltd.
3 */
4
5 #ifndef _DPI_MSG_H_
6 #define _DPI_MSG_H_
7
8 #include <dirent.h>
9 #include <fcntl.h>
10 #include <string.h>
11 #include <unistd.h>
12
13 #include "otx2_dpi_rawdev.h"
14
15 /* DPI PF DBDF information macro's */
16 #define DPI_PF_DBDF_DOMAIN 0
17 #define DPI_PF_DBDF_BUS 5
18 #define DPI_PF_DBDF_DEVICE 0
19 #define DPI_PF_DBDF_FUNCTION 0
20
21 #define DPI_PF_MBOX_SYSFS_ENTRY "dpi_device_config"
22
23 union dpi_mbox_message_u {
24 uint64_t u[2];
25 struct dpi_mbox_message_s {
26 /* VF ID to configure */
27 uint64_t vfid :4;
28 /* Command code */
29 uint64_t cmd :4;
30 /* Command buffer size in 8-byte words */
31 uint64_t csize :14;
32 /* aura of the command buffer */
33 uint64_t aura :20;
34 /* SSO PF function */
35 uint64_t sso_pf_func :16;
36 /* NPA PF function */
37 uint64_t npa_pf_func :16;
38 } s;
39 };
40
41 static inline int
send_msg_to_pf(struct rte_pci_addr * pci,const char * value,int size)42 send_msg_to_pf(struct rte_pci_addr *pci, const char *value, int size)
43 {
44 char buff[255] = { 0 };
45 int res, fd;
46
47 res = snprintf(buff, sizeof(buff), "%s/" PCI_PRI_FMT "/%s",
48 rte_pci_get_sysfs_path(), pci->domain,
49 pci->bus, DPI_PF_DBDF_DEVICE & 0x7,
50 DPI_PF_DBDF_FUNCTION & 0x7, DPI_PF_MBOX_SYSFS_ENTRY);
51 if ((res < 0) || ((size_t)res > sizeof(buff)))
52 return -ERANGE;
53
54 fd = open(buff, O_WRONLY);
55 if (fd < 0)
56 return -EACCES;
57 res = write(fd, value, size);
58 close(fd);
59 if (res < 0)
60 return -EACCES;
61
62 return 0;
63 }
64
65 int
otx2_dpi_queue_open(struct dpi_vf_s * dpivf,uint32_t size,uint32_t gaura)66 otx2_dpi_queue_open(struct dpi_vf_s *dpivf, uint32_t size, uint32_t gaura)
67 {
68 union dpi_mbox_message_u mbox_msg;
69 int ret = 0;
70
71 /* DPI PF driver expects vfid starts from index 0 */
72 mbox_msg.s.vfid = dpivf->vf_id;
73 mbox_msg.s.cmd = DPI_QUEUE_OPEN;
74 mbox_msg.s.csize = size;
75 mbox_msg.s.aura = gaura;
76 mbox_msg.s.sso_pf_func = otx2_sso_pf_func_get();
77 mbox_msg.s.npa_pf_func = otx2_npa_pf_func_get();
78
79 ret = send_msg_to_pf(&dpivf->dev->addr, (const char *)&mbox_msg,
80 sizeof(mbox_msg));
81 if (ret < 0)
82 otx2_dpi_dbg("Failed to send mbox message to dpi pf");
83
84 return ret;
85 }
86
87 int
otx2_dpi_queue_close(struct dpi_vf_s * dpivf)88 otx2_dpi_queue_close(struct dpi_vf_s *dpivf)
89 {
90 union dpi_mbox_message_u mbox_msg;
91 int ret = 0;
92
93 /* DPI PF driver expects vfid starts from index 0 */
94 mbox_msg.s.vfid = dpivf->vf_id;
95 mbox_msg.s.cmd = DPI_QUEUE_CLOSE;
96
97 ret = send_msg_to_pf(&dpivf->dev->addr, (const char *)&mbox_msg,
98 sizeof(mbox_msg));
99 if (ret < 0)
100 otx2_dpi_dbg("Failed to send mbox message to dpi pf");
101
102 return ret;
103 }
104
105 #endif /* _DPI_MSG_H_ */
106