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Date: Thu, 25 Jul 2019 00:48:27 +0000
From: Sudarsana Reddy Kalluru <skalluru@...vell.com>
To: Saeed Mahameed <saeedm@...lanox.com>,
"davem@...emloft.net" <davem@...emloft.net>
CC: Ariel Elior <aelior@...vell.com>,
Michal Kalderon <mkalderon@...vell.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next 2/2] qed: Add API for flashing the nvm
attributes.
> -----Original Message-----
> From: Saeed Mahameed <saeedm@...lanox.com>
> Sent: Thursday, July 25, 2019 1:13 AM
> To: Sudarsana Reddy Kalluru <skalluru@...vell.com>;
> davem@...emloft.net
> Cc: Ariel Elior <aelior@...vell.com>; Michal Kalderon
> <mkalderon@...vell.com>; netdev@...r.kernel.org
> Subject: [EXT] Re: [PATCH net-next 2/2] qed: Add API for flashing the nvm
> attributes.
>
> External Email
>
> ----------------------------------------------------------------------
> On Tue, 2019-07-23 at 21:51 -0700, Sudarsana Reddy Kalluru wrote:
> > The patch adds driver interface for reading the NVM config request and
> > update the attributes on nvm config flash partition.
> >
>
> You didn't not use the get_cfg API you added in previous patch.
Thanks for your review. Will move this API to the next patch series which will plan to send shortly.
>
> Also can you please clarify how the user reads/write from/to NVM config
> ? i mean what UAPIs and tools are being used ?
NVM config/partition will be updated using ethtool flash update command (i.e., ethtool -f) just like the update of
other flash partitions of qed device. Example code path,
ethool-flash_device --> qede_flash_device() --> qed_nvm_flash() --> qed_nvm_flash_cfg_write()
>
> > Signed-off-by: Sudarsana Reddy Kalluru <skalluru@...vell.com>
> > Signed-off-by: Ariel Elior <aelior@...vell.com>
> > ---
> > drivers/net/ethernet/qlogic/qed/qed_main.c | 65
> > ++++++++++++++++++++++++++++++
> > include/linux/qed/qed_if.h | 1 +
> > 2 files changed, 66 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c
> > b/drivers/net/ethernet/qlogic/qed/qed_main.c
> > index 829dd60..54f00d2 100644
> > --- a/drivers/net/ethernet/qlogic/qed/qed_main.c
> > +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
> > @@ -67,6 +67,8 @@
> > #define QED_ROCE_QPS (8192)
> > #define QED_ROCE_DPIS (8)
> > #define QED_RDMA_SRQS QED_ROCE_QPS
> > +#define QED_NVM_CFG_SET_FLAGS 0xE
> > +#define QED_NVM_CFG_SET_PF_FLAGS 0x1E
> >
> > static char version[] =
> > "QLogic FastLinQ 4xxxx Core Module qed " DRV_MODULE_VERSION
> > "\n";
> > @@ -2227,6 +2229,66 @@ static int qed_nvm_flash_image_validate(struct
> > qed_dev *cdev,
> > return 0;
> > }
> >
> > +/* Binary file format -
> > + * /----------------------------------------------------------
> > ------------\
> > + * 0B | 0x5 [command
> > index] |
> > + * 4B | Entity ID | Reserved | Number of config
> > attributes |
> > + * 8B | Config ID | Length |
> > Value |
> > +
> > * |
> > |
> > + * \----------------------------------------------------------
> > ------------/
> > + * There can be several Cfg_id-Length-Value sets as specified by
> > 'Number of...'.
> > + * Entity ID - A non zero entity value for which the config need to
> > be updated.
> > + */
> > +static int qed_nvm_flash_cfg_write(struct qed_dev *cdev, const u8
> > **data)
> > +{
> > + struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
> > + u8 entity_id, len, buf[32];
> > + struct qed_ptt *ptt;
> > + u16 cfg_id, count;
> > + int rc = 0, i;
> > + u32 flags;
> > +
> > + ptt = qed_ptt_acquire(hwfn);
> > + if (!ptt)
> > + return -EAGAIN;
> > +
> > + /* NVM CFG ID attribute header */
> > + *data += 4;
> > + entity_id = **data;
> > + *data += 2;
> > + count = *((u16 *)*data);
> > + *data += 2;
> > +
> > + DP_VERBOSE(cdev, NETIF_MSG_DRV,
> > + "Read config ids: entity id %02x num _attrs =
> > %0d\n",
> > + entity_id, count);
> > + /* NVM CFG ID attributes */
> > + for (i = 0; i < count; i++) {
> > + cfg_id = *((u16 *)*data);
> > + *data += 2;
> > + len = **data;
> > + (*data)++;
> > + memcpy(buf, *data, len);
> > + *data += len;
> > +
> > + flags = entity_id ? QED_NVM_CFG_SET_PF_FLAGS :
> > + QED_NVM_CFG_SET_FLAGS;
> > +
> > + DP_VERBOSE(cdev, NETIF_MSG_DRV,
> > + "cfg_id = %d len = %d\n", cfg_id, len);
> > + rc = qed_mcp_nvm_set_cfg(hwfn, ptt, cfg_id, entity_id,
> > flags,
> > + buf, len);
> > + if (rc) {
> > + DP_ERR(cdev, "Error %d configuring %d\n", rc,
> > cfg_id);
> > + break;
> > + }
> > + }
> > +
> > + qed_ptt_release(hwfn, ptt);
> > +
> > + return rc;
> > +}
> > +
> > static int qed_nvm_flash(struct qed_dev *cdev, const char *name)
> > {
> > const struct firmware *image;
> > @@ -2268,6 +2330,9 @@ static int qed_nvm_flash(struct qed_dev *cdev,
> > const char *name)
> > rc = qed_nvm_flash_image_access(cdev, &data,
> > &check_resp);
> > break;
> > + case QED_NVM_FLASH_CMD_NVM_CFG_ID:
> > + rc = qed_nvm_flash_cfg_write(cdev, &data);
> > + break;
> > default:
> > DP_ERR(cdev, "Unknown command %08x\n",
> > cmd_type);
> > rc = -EINVAL;
> > diff --git a/include/linux/qed/qed_if.h b/include/linux/qed/qed_if.h
> > index eef02e6..23805ea 100644
> > --- a/include/linux/qed/qed_if.h
> > +++ b/include/linux/qed/qed_if.h
> > @@ -804,6 +804,7 @@ enum qed_nvm_flash_cmd {
> > QED_NVM_FLASH_CMD_FILE_DATA = 0x2,
> > QED_NVM_FLASH_CMD_FILE_START = 0x3,
> > QED_NVM_FLASH_CMD_NVM_CHANGE = 0x4,
> > + QED_NVM_FLASH_CMD_NVM_CFG_ID = 0x5,
> > QED_NVM_FLASH_CMD_NVM_MAX,
> > };
> >
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