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net/qede/base: workaround to indicate SHMEM data ready

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The driver can notify that there was an MCP reset and read the SHMEM
values before the management FW has completed initializing them.
As a temporary solution, the "sup_msgs" field is used as a SHMEM data
ready indication. This should be replaced with an actual indication
when it is provided by the management FW.

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>
This commit is contained in:
Rasesh Mody 2018-09-29 08:14:29 +00:00 committed by Ferruh Yigit
parent cbc2359676
commit 23c5600a88
1 changed files with 35 additions and 8 deletions
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43
drivers/net/qede/base/ecore_mcp.c
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@ -177,10 +177,16 @@ enum _ecore_status_t ecore_mcp_free(struct ecore_hwfn *p_hwfn)
return ECORE_SUCCESS;
}
/* Maximum of 1 sec to wait for the SHMEM ready indication */
#define ECORE_MCP_SHMEM_RDY_MAX_RETRIES 20
#define ECORE_MCP_SHMEM_RDY_ITER_MS 50
static enum _ecore_status_t ecore_load_mcp_offsets(struct ecore_hwfn *p_hwfn,
struct ecore_ptt *p_ptt)
{
struct ecore_mcp_info *p_info = p_hwfn->mcp_info;
u8 cnt = ECORE_MCP_SHMEM_RDY_MAX_RETRIES;
u8 msec = ECORE_MCP_SHMEM_RDY_ITER_MS;
u32 drv_mb_offsize, mfw_mb_offsize;
u32 mcp_pf_id = MCP_PF_ID(p_hwfn);
@ -198,6 +204,35 @@ static enum _ecore_status_t ecore_load_mcp_offsets(struct ecore_hwfn *p_hwfn,
p_info->public_base |= GRCBASE_MCP;
/* Get the MFW MB address and number of supported messages */
mfw_mb_offsize = ecore_rd(p_hwfn, p_ptt,
SECTION_OFFSIZE_ADDR(p_info->public_base,
PUBLIC_MFW_MB));
p_info->mfw_mb_addr = SECTION_ADDR(mfw_mb_offsize, mcp_pf_id);
p_info->mfw_mb_length = (u16)ecore_rd(p_hwfn, p_ptt,
p_info->mfw_mb_addr);
/* @@@TBD:
* The driver can notify that there was an MCP reset, and read the SHMEM
* values before the MFW has completed initializing them.
* As a temporary solution, the "sup_msgs" field is used as a data ready
* indication.
* This should be replaced with an actual indication when it is provided
* by the MFW.
*/
while (!p_info->mfw_mb_length && cnt--) {
OSAL_MSLEEP(msec);
p_info->mfw_mb_length = (u16)ecore_rd(p_hwfn, p_ptt,
p_info->mfw_mb_addr);
}
if (!cnt) {
DP_NOTICE(p_hwfn, false,
"Failed to get the SHMEM ready notification after %d msec\n",
ECORE_MCP_SHMEM_RDY_MAX_RETRIES * msec);
return ECORE_TIMEOUT;
}
/* Calculate the driver and MFW mailbox address */
drv_mb_offsize = ecore_rd(p_hwfn, p_ptt,
SECTION_OFFSIZE_ADDR(p_info->public_base,
@ -208,14 +243,6 @@ static enum _ecore_status_t ecore_load_mcp_offsets(struct ecore_hwfn *p_hwfn,
" mcp_pf_id = 0x%x\n",
drv_mb_offsize, p_info->drv_mb_addr, mcp_pf_id);
/* Set the MFW MB address */
mfw_mb_offsize = ecore_rd(p_hwfn, p_ptt,
SECTION_OFFSIZE_ADDR(p_info->public_base,
PUBLIC_MFW_MB));
p_info->mfw_mb_addr = SECTION_ADDR(mfw_mb_offsize, mcp_pf_id);
p_info->mfw_mb_length = (u16)ecore_rd(p_hwfn, p_ptt,
p_info->mfw_mb_addr);
/* Get the current driver mailbox sequence before sending
* the first command
*/