1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2023 Advanced Micro Devices, Inc */
3
4 #include "core.h"
5
6 /* The worst case wait for the install activity is about 25 minutes when
7 * installing a new CPLD, which is very seldom. Normal is about 30-35
8 * seconds. Since the driver can't tell if a CPLD update will happen we
9 * set the timeout for the ugly case.
10 */
11 #define PDSC_FW_INSTALL_TIMEOUT (25 * 60)
12 #define PDSC_FW_SELECT_TIMEOUT 30
13
14 /* Number of periodic log updates during fw file download */
15 #define PDSC_FW_INTERVAL_FRACTION 32
16
pdsc_devcmd_fw_download_locked(struct pdsc * pdsc,u64 addr,u32 offset,u32 length)17 static int pdsc_devcmd_fw_download_locked(struct pdsc *pdsc, u64 addr,
18 u32 offset, u32 length)
19 {
20 union pds_core_dev_cmd cmd = {
21 .fw_download.opcode = PDS_CORE_CMD_FW_DOWNLOAD,
22 .fw_download.offset = cpu_to_le32(offset),
23 .fw_download.addr = cpu_to_le64(addr),
24 .fw_download.length = cpu_to_le32(length),
25 };
26 union pds_core_dev_comp comp;
27
28 return pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
29 }
30
pdsc_devcmd_fw_install(struct pdsc * pdsc)31 static int pdsc_devcmd_fw_install(struct pdsc *pdsc)
32 {
33 union pds_core_dev_cmd cmd = {
34 .fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
35 .fw_control.oper = PDS_CORE_FW_INSTALL_ASYNC
36 };
37 union pds_core_dev_comp comp;
38 int err;
39
40 err = pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
41 if (err < 0)
42 return err;
43
44 return comp.fw_control.slot;
45 }
46
pdsc_devcmd_fw_activate(struct pdsc * pdsc,enum pds_core_fw_slot slot)47 static int pdsc_devcmd_fw_activate(struct pdsc *pdsc,
48 enum pds_core_fw_slot slot)
49 {
50 union pds_core_dev_cmd cmd = {
51 .fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
52 .fw_control.oper = PDS_CORE_FW_ACTIVATE_ASYNC,
53 .fw_control.slot = slot
54 };
55 union pds_core_dev_comp comp;
56
57 return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
58 }
59
pdsc_fw_status_long_wait(struct pdsc * pdsc,const char * label,unsigned long timeout,u8 fw_cmd,struct netlink_ext_ack * extack)60 static int pdsc_fw_status_long_wait(struct pdsc *pdsc,
61 const char *label,
62 unsigned long timeout,
63 u8 fw_cmd,
64 struct netlink_ext_ack *extack)
65 {
66 union pds_core_dev_cmd cmd = {
67 .fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
68 .fw_control.oper = fw_cmd,
69 };
70 union pds_core_dev_comp comp;
71 unsigned long start_time;
72 unsigned long end_time;
73 int err;
74
75 /* Ping on the status of the long running async install
76 * command. We get EAGAIN while the command is still
77 * running, else we get the final command status.
78 */
79 start_time = jiffies;
80 end_time = start_time + (timeout * HZ);
81 do {
82 err = pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
83 msleep(20);
84 } while (time_before(jiffies, end_time) &&
85 (err == -EAGAIN || err == -ETIMEDOUT));
86
87 if (err == -EAGAIN || err == -ETIMEDOUT) {
88 NL_SET_ERR_MSG_MOD(extack, "Firmware wait timed out");
89 dev_err(pdsc->dev, "DEV_CMD firmware wait %s timed out\n",
90 label);
91 } else if (err) {
92 NL_SET_ERR_MSG_MOD(extack, "Firmware wait failed");
93 }
94
95 return err;
96 }
97
pdsc_firmware_update(struct pdsc * pdsc,const struct firmware * fw,struct netlink_ext_ack * extack)98 int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
99 struct netlink_ext_ack *extack)
100 {
101 u32 buf_sz, copy_sz, offset;
102 struct devlink *dl;
103 int next_interval;
104 u64 data_addr;
105 int err = 0;
106 int fw_slot;
107
108 dev_info(pdsc->dev, "Installing firmware\n");
109
110 dl = priv_to_devlink(pdsc);
111 devlink_flash_update_status_notify(dl, "Preparing to flash",
112 NULL, 0, 0);
113
114 buf_sz = sizeof(pdsc->cmd_regs->data);
115
116 dev_dbg(pdsc->dev,
117 "downloading firmware - size %d part_sz %d nparts %lu\n",
118 (int)fw->size, buf_sz, DIV_ROUND_UP(fw->size, buf_sz));
119
120 offset = 0;
121 next_interval = 0;
122 data_addr = offsetof(struct pds_core_dev_cmd_regs, data);
123 while (offset < fw->size) {
124 if (offset >= next_interval) {
125 devlink_flash_update_status_notify(dl, "Downloading",
126 NULL, offset,
127 fw->size);
128 next_interval = offset +
129 (fw->size / PDSC_FW_INTERVAL_FRACTION);
130 }
131
132 copy_sz = min_t(unsigned int, buf_sz, fw->size - offset);
133 mutex_lock(&pdsc->devcmd_lock);
134 memcpy_toio(&pdsc->cmd_regs->data, fw->data + offset, copy_sz);
135 err = pdsc_devcmd_fw_download_locked(pdsc, data_addr,
136 offset, copy_sz);
137 mutex_unlock(&pdsc->devcmd_lock);
138 if (err) {
139 dev_err(pdsc->dev,
140 "download failed offset 0x%x addr 0x%llx len 0x%x: %pe\n",
141 offset, data_addr, copy_sz, ERR_PTR(err));
142 NL_SET_ERR_MSG_MOD(extack, "Segment download failed");
143 goto err_out;
144 }
145 offset += copy_sz;
146 }
147 devlink_flash_update_status_notify(dl, "Downloading", NULL,
148 fw->size, fw->size);
149
150 devlink_flash_update_timeout_notify(dl, "Installing", NULL,
151 PDSC_FW_INSTALL_TIMEOUT);
152
153 fw_slot = pdsc_devcmd_fw_install(pdsc);
154 if (fw_slot < 0) {
155 err = fw_slot;
156 dev_err(pdsc->dev, "install failed: %pe\n", ERR_PTR(err));
157 NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware install");
158 goto err_out;
159 }
160
161 err = pdsc_fw_status_long_wait(pdsc, "Installing",
162 PDSC_FW_INSTALL_TIMEOUT,
163 PDS_CORE_FW_INSTALL_STATUS,
164 extack);
165 if (err)
166 goto err_out;
167
168 devlink_flash_update_timeout_notify(dl, "Selecting", NULL,
169 PDSC_FW_SELECT_TIMEOUT);
170
171 err = pdsc_devcmd_fw_activate(pdsc, fw_slot);
172 if (err) {
173 NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware select");
174 goto err_out;
175 }
176
177 err = pdsc_fw_status_long_wait(pdsc, "Selecting",
178 PDSC_FW_SELECT_TIMEOUT,
179 PDS_CORE_FW_ACTIVATE_STATUS,
180 extack);
181 if (err)
182 goto err_out;
183
184 dev_info(pdsc->dev, "Firmware update completed, slot %d\n", fw_slot);
185
186 err_out:
187 if (err)
188 devlink_flash_update_status_notify(dl, "Flash failed",
189 NULL, 0, 0);
190 else
191 devlink_flash_update_status_notify(dl, "Flash done",
192 NULL, 0, 0);
193 return err;
194 }
195
