openkylin
/
platform_kernel-5.15
mirror of https://gitee.com/openkylin/platform_kernel-5.15.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

qed: Wait for MCP halt and resume commands to take place 

Successive iterations of halting and resuming the management chip (MCP)
might fail, since currently the driver doesn't wait for these operations to
actually take place.
This patch prevents the driver from moving forward before the operations
are reflected in the state register.

Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tomer Tayar 2018-08-20 00:01:43 +03:00 committed by David S. Miller
parent f00d25f315
commit 76271809f4
2 changed files with 39 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/net/ethernet/qlogic/qed/qed_mcp.c
View File

@ -2109,31 +2109,61 @@ qed_mcp_send_drv_version(struct qed_hwfn *p_hwfn,
return rc;
}
/* A maximal 100 msec waiting time for the MCP to halt */
#define QED_MCP_HALT_SLEEP_MS 10
#define QED_MCP_HALT_MAX_RETRIES 10
int qed_mcp_halt(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u32 resp = 0, param = 0;
u32 resp = 0, param = 0, cpu_state, cnt = 0;
int rc;
rc = qed_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_MCP_HALT, 0, &resp,
&param);
if (rc)
if (rc) {
DP_ERR(p_hwfn, "MCP response failure, aborting\n");
return rc;
}
return rc;
do {
msleep(QED_MCP_HALT_SLEEP_MS);
cpu_state = qed_rd(p_hwfn, p_ptt, MCP_REG_CPU_STATE);
if (cpu_state & MCP_REG_CPU_STATE_SOFT_HALTED)
break;
} while (++cnt < QED_MCP_HALT_MAX_RETRIES);
if (cnt == QED_MCP_HALT_MAX_RETRIES) {
DP_NOTICE(p_hwfn,
"Failed to halt the MCP [CPU_MODE = 0x%08x, CPU_STATE = 0x%08x]\n",
qed_rd(p_hwfn, p_ptt, MCP_REG_CPU_MODE), cpu_state);
return -EBUSY;
}
return 0;
}
#define QED_MCP_RESUME_SLEEP_MS 10
int qed_mcp_resume(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u32 value, cpu_mode;
u32 cpu_mode, cpu_state;
qed_wr(p_hwfn, p_ptt, MCP_REG_CPU_STATE, 0xffffffff);
value = qed_rd(p_hwfn, p_ptt, MCP_REG_CPU_MODE);
value &= ~MCP_REG_CPU_MODE_SOFT_HALT;
qed_wr(p_hwfn, p_ptt, MCP_REG_CPU_MODE, value);
cpu_mode = qed_rd(p_hwfn, p_ptt, MCP_REG_CPU_MODE);
cpu_mode &= ~MCP_REG_CPU_MODE_SOFT_HALT;
qed_wr(p_hwfn, p_ptt, MCP_REG_CPU_MODE, cpu_mode);
msleep(QED_MCP_RESUME_SLEEP_MS);
cpu_state = qed_rd(p_hwfn, p_ptt, MCP_REG_CPU_STATE);
return (cpu_mode & MCP_REG_CPU_MODE_SOFT_HALT) ? -EAGAIN : 0;
if (cpu_state & MCP_REG_CPU_STATE_SOFT_HALTED) {
DP_NOTICE(p_hwfn,
"Failed to resume the MCP [CPU_MODE = 0x%08x, CPU_STATE = 0x%08x]\n",
cpu_mode, cpu_state);
return -EBUSY;
}
return 0;
}
int qed_mcp_ov_update_current_config(struct qed_hwfn *p_hwfn,

1
drivers/net/ethernet/qlogic/qed/qed_reg_addr.h
View File

@ -562,6 +562,7 @@
0
#define MCP_REG_CPU_STATE \
0xe05004UL
#define MCP_REG_CPU_STATE_SOFT_HALTED (0x1UL << 10)
#define MCP_REG_CPU_EVENT_MASK \
0xe05008UL
#define PGLUE_B_REG_PF_BAR0_SIZE \