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Date: Fri, 7 Jul 2023 02:48:28 -0700
From: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
To: Saurabh Singh Sengar <ssengar@...rosoft.com>
Cc: KY Srinivasan <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
"wei.liu@...nel.org" <wei.liu@...nel.org>,
Dexuan Cui <decui@...rosoft.com>,
"davem@...emloft.net" <davem@...emloft.net>,
"edumazet@...gle.com" <edumazet@...gle.com>,
"kuba@...nel.org" <kuba@...nel.org>,
"pabeni@...hat.com" <pabeni@...hat.com>,
Long Li <longli@...rosoft.com>,
Ajay Sharma <sharmaajay@...rosoft.com>,
"leon@...nel.org" <leon@...nel.org>,
"cai.huoqing@...ux.dev" <cai.huoqing@...ux.dev>,
"ssengar@...ux.microsoft.com" <ssengar@...ux.microsoft.com>,
"vkuznets@...hat.com" <vkuznets@...hat.com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
"stable@...r.kernel.org" <stable@...r.kernel.org>,
Souradeep Chakrabarti <schakrabarti@...rosoft.com>
Subject: Re: [PATCH net] net: mana: Configure hwc timeout from hardware
On Wed, Jul 05, 2023 at 11:11:50AM +0000, Saurabh Singh Sengar wrote:
>
>
> > -----Original Message-----
> > From: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
> > Sent: Wednesday, July 5, 2023 3:03 PM
> > To: KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> > <haiyangz@...rosoft.com>; wei.liu@...nel.org; Dexuan Cui
> > <decui@...rosoft.com>; davem@...emloft.net; edumazet@...gle.com;
> > kuba@...nel.org; pabeni@...hat.com; Long Li <longli@...rosoft.com>; Ajay
> > Sharma <sharmaajay@...rosoft.com>; leon@...nel.org;
> > cai.huoqing@...ux.dev; ssengar@...ux.microsoft.com;
> > vkuznets@...hat.com; tglx@...utronix.de; linux-hyperv@...r.kernel.org;
> > netdev@...r.kernel.org; linux-kernel@...r.kernel.org; linux-
> > rdma@...r.kernel.org
> > Cc: stable@...r.kernel.org; Souradeep Chakrabarti
> > <schakrabarti@...rosoft.com>; Souradeep Chakrabarti
> > <schakrabarti@...ux.microsoft.com>
> > Subject: [PATCH net] net: mana: Configure hwc timeout from hardware
> >
> > At present hwc timeout value is a fixed value.
> > This patch sets the hwc timeout from the hardware.
> >
> > Signed-off-by: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
> > ---
> > .../net/ethernet/microsoft/mana/gdma_main.c | 27 +++++++++++++++++++
> > .../net/ethernet/microsoft/mana/hw_channel.c | 25 ++++++++++++++++-
> > include/net/mana/gdma.h | 20 +++++++++++++-
> > include/net/mana/hw_channel.h | 5 ++++
> > 4 files changed, 75 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c
> > b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> > index 8f3f78b68592..5d30347e0137 100644
> > --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
> > +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> > @@ -106,6 +106,30 @@ static int mana_gd_query_max_resources(struct
> > pci_dev *pdev)
> > return 0;
> > }
> >
> > +static int mana_gd_query_hwc_timeout(struct pci_dev *pdev, u32
> > +*timeout_val) {
> > + struct gdma_context *gc = pci_get_drvdata(pdev);
> > + struct gdma_query_hwc_timeout_req req = {};
> > + struct gdma_query_hwc_timeout_resp resp = {};
> > + int err;
> > +
> > + mana_gd_init_req_hdr(&req.hdr, GDMA_QUERY_HWC_TIMEOUT,
> > + sizeof(req), sizeof(resp));
> > + req.timeout_ms = *timeout_val;
> > + err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp),
> > &resp);
> > + if (err || resp.hdr.status) {
> > + dev_err(gc->dev, "Failed to query timeout: %d, 0x%x\n", err,
> > + resp.hdr.status);
> > + return err ? err : -EPROTO;
> > + }
> > +
> > + *timeout_val = resp.timeout_ms;
> > + dev_info(gc->dev, "Successfully changed the timeout value %u\n",
> > + *timeout_val);
> > +
> > + return 0;
> > +}
> > +
> > static int mana_gd_detect_devices(struct pci_dev *pdev) {
> > struct gdma_context *gc = pci_get_drvdata(pdev); @@ -879,6 +903,7
> > @@ int mana_gd_verify_vf_version(struct pci_dev *pdev)
> > struct gdma_context *gc = pci_get_drvdata(pdev);
> > struct gdma_verify_ver_resp resp = {};
> > struct gdma_verify_ver_req req = {};
> > + struct hw_channel_context *hwc = gc->hwc.driver_data;
> > int err;
> >
> > mana_gd_init_req_hdr(&req.hdr,
> > GDMA_VERIFY_VF_DRIVER_VERSION, @@ -907,6 +932,8 @@ int
> > mana_gd_verify_vf_version(struct pci_dev *pdev)
> > err, resp.hdr.status);
> > return err ? err : -EPROTO;
> > }
> > + if (resp.pf_cap_flags1 &
> > GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG)
> > + mana_gd_query_hwc_timeout(pdev, &hwc->hwc_timeout);
> >
> > return 0;
> > }
> > diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.c
> > b/drivers/net/ethernet/microsoft/mana/hw_channel.c
> > index 9d1507eba5b9..f5980c26fd09 100644
> > --- a/drivers/net/ethernet/microsoft/mana/hw_channel.c
> > +++ b/drivers/net/ethernet/microsoft/mana/hw_channel.c
> > @@ -174,7 +174,25 @@ static void mana_hwc_init_event_handler(void *ctx,
> > struct gdma_queue *q_self,
> > complete(&hwc->hwc_init_eqe_comp);
> > break;
> >
> > + case GDMA_EQE_HWC_SOC_RECONFIG_DATA:
> > + type_data.as_uint32 = event->details[0];
> > + type = type_data.type;
> > + val = type_data.value;
> > +
> > + switch (type) {
> > + case HWC_DATA_CFG_HWC_TIMEOUT:
> > + hwc->hwc_timeout = val;
> > + break;
> > +
> > + default:
> > + dev_warn(hwc->dev, "Received unknown reconfig
> > type %u\n", type);
> > + break;
> > + }
> > +
> > + break;
> > +
> > default:
> > + dev_warn(hwc->dev, "Received unknown gdma event %u\n",
> > event->type);
> > /* Ignore unknown events, which should never happen. */
> > break;
> > }
> > @@ -704,6 +722,7 @@ int mana_hwc_create_channel(struct gdma_context
> > *gc)
> > gd->pdid = INVALID_PDID;
> > gd->doorbell = INVALID_DOORBELL;
> >
> > + hwc->hwc_timeout =
> > HW_CHANNEL_WAIT_RESOURCE_TIMEOUT_MS;
> > /* mana_hwc_init_queues() only creates the required data structures,
> > * and doesn't touch the HWC device.
> > */
> > @@ -770,6 +789,8 @@ void mana_hwc_destroy_channel(struct
> > gdma_context *gc)
> > hwc->gdma_dev->doorbell = INVALID_DOORBELL;
> > hwc->gdma_dev->pdid = INVALID_PDID;
> >
> > + hwc->hwc_timeout = 0;
> > +
> > kfree(hwc);
> > gc->hwc.driver_data = NULL;
> > gc->hwc.gdma_context = NULL;
> > @@ -818,6 +839,7 @@ int mana_hwc_send_request(struct
> > hw_channel_context *hwc, u32 req_len,
> > dest_vrq = hwc->pf_dest_vrq_id;
> > dest_vrcq = hwc->pf_dest_vrcq_id;
> > }
> > + dev_err(hwc->dev, "HWC: timeout %u ms\n", hwc->hwc_timeout);
>
> Can avoid dev_err here
I have fixed it in v2 patch
>
> >
> > err = mana_hwc_post_tx_wqe(txq, tx_wr, dest_vrq, dest_vrcq, false);
> > if (err) {
> > @@ -825,7 +847,8 @@ int mana_hwc_send_request(struct
> > hw_channel_context *hwc, u32 req_len,
> > goto out;
> > }
> >
> > - if (!wait_for_completion_timeout(&ctx->comp_event, 30 * HZ)) {
> > + if (!wait_for_completion_timeout(&ctx->comp_event,
> > + (hwc->hwc_timeout / 1000) * HZ)) {
> > dev_err(hwc->dev, "HWC: Request timed out!\n");
> > err = -ETIMEDOUT;
> > goto out;
> > diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h index
> > 96c120160f15..88b6ef7ce1a6 100644
> > --- a/include/net/mana/gdma.h
> > +++ b/include/net/mana/gdma.h
> > @@ -33,6 +33,7 @@ enum gdma_request_type {
> > GDMA_DESTROY_PD = 30,
> > GDMA_CREATE_MR = 31,
> > GDMA_DESTROY_MR = 32,
> > + GDMA_QUERY_HWC_TIMEOUT = 84, /* 0x54 */
> > };
> >
> > #define GDMA_RESOURCE_DOORBELL_PAGE 27
> > @@ -57,6 +58,8 @@ enum gdma_eqe_type {
> > GDMA_EQE_HWC_INIT_EQ_ID_DB = 129,
> > GDMA_EQE_HWC_INIT_DATA = 130,
> > GDMA_EQE_HWC_INIT_DONE = 131,
> > + GDMA_EQE_HWC_SOC_RECONFIG = 132,
> > + GDMA_EQE_HWC_SOC_RECONFIG_DATA = 133,
> > };
> >
> > enum {
> > @@ -531,10 +534,12 @@ enum {
> > * so the driver is able to reliably support features like busy_poll.
> > */
> > #define GDMA_DRV_CAP_FLAG_1_NAPI_WKDONE_FIX BIT(2)
> > +#define GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG BIT(3)
> >
> > #define GDMA_DRV_CAP_FLAGS1 \
> > (GDMA_DRV_CAP_FLAG_1_EQ_SHARING_MULTI_VPORT | \
> > - GDMA_DRV_CAP_FLAG_1_NAPI_WKDONE_FIX)
> > + GDMA_DRV_CAP_FLAG_1_NAPI_WKDONE_FIX | \
> > + GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG)
> >
> > #define GDMA_DRV_CAP_FLAGS2 0
> >
> > @@ -664,6 +669,19 @@ struct gdma_disable_queue_req {
> > u32 alloc_res_id_on_creation;
> > }; /* HW DATA */
> >
> > +/* GDMA_QUERY_HWC_TIMEOUT */
> > +struct gdma_query_hwc_timeout_req {
> > + struct gdma_req_hdr hdr;
> > + u32 timeout_ms;
> > + u32 reserved;
> > +};
> > +
> > +struct gdma_query_hwc_timeout_resp {
> > + struct gdma_resp_hdr hdr;
> > + u32 timeout_ms;
> > + u32 reserved;
> > +};
> > +
> > enum atb_page_size {
> > ATB_PAGE_SIZE_4K,
> > ATB_PAGE_SIZE_8K,
> > diff --git a/include/net/mana/hw_channel.h
> > b/include/net/mana/hw_channel.h index 6a757a6e2732..3d3b5c881bc1
> > 100644
> > --- a/include/net/mana/hw_channel.h
> > +++ b/include/net/mana/hw_channel.h
> > @@ -23,6 +23,10 @@
> > #define HWC_INIT_DATA_PF_DEST_RQ_ID 10
> > #define HWC_INIT_DATA_PF_DEST_CQ_ID 11
> >
> > +#define HWC_DATA_CFG_HWC_TIMEOUT 1
> > +
> > +#define HW_CHANNEL_WAIT_RESOURCE_TIMEOUT_MS 30000
> > +
> > /* Structures labeled with "HW DATA" are exchanged with the hardware. All
> > of
> > * them are naturally aligned and hence don't need __packed.
> > */
> > @@ -182,6 +186,7 @@ struct hw_channel_context {
> >
> > u32 pf_dest_vrq_id;
> > u32 pf_dest_vrcq_id;
> > + u32 hwc_timeout;
> >
> > struct hwc_caller_ctx *caller_ctx;
> > };
> > --
> > 2.34.1
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