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smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tEwrBgvo; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tEwrBgvo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F038EC116B1; Mon, 8 Jul 2024 12:40:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720442460; bh=inyrxK1CtvgUU1j2vs6I2E3bLGPJnrjr+jybS557Q/E=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tEwrBgvox5WkrtncTXiEFe6ih35FbSdTY41UbbjL53JEMm7a/GJNjFjrbCpK26jge VVY0a/ZTk+csn26O7CGBCZ/7O6jDPIA7XMVYZgB7JU8XX8ExXp4fHvOdKtIsFIj7WY 911F7g8SsGR+ECam03JBPXlwXDd8FIyvFJCV6f/akzFOEs0Sz546tcnFIw0RCoLLCK HYXB7BlNHdKuasE+hAmBVOAtJT+pdntP6oRII1vceGeLbYLDM1W5xNVxCXoCMNIdom MvRkPjTtC/gCGfvz3acgrCkTzA+6ZUm52hMRhMZAJ4ceLFhSu5AVkBF0i0EAffzgiP Lo1NBdu+q9T4Q== Date: Mon, 8 Jul 2024 13:40:55 +0100 From: Simon Horman To: Mateusz Polchlopek Cc: intel-wired-lan@lists.osuosl.org, apw@canonical.com, joe@perches.com, dwaipayanray1@gmail.com, lukas.bulwahn@gmail.com, akpm@linux-foundation.org, willemb@google.com, edumazet@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Przemek Kitszel , Igor Bagnucki , Wojciech Drewek Subject: Re: [Intel-wired-lan] [PATCH iwl-next v1 3/6] ice: add Tx hang devlink health reporter Message-ID: <20240708124055.GN1481495@kernel.org> References: <20240703125922.5625-1-mateusz.polchlopek@intel.com> <20240703125922.5625-4-mateusz.polchlopek@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240703125922.5625-4-mateusz.polchlopek@intel.com> On Wed, Jul 03, 2024 at 08:59:19AM -0400, Mateusz Polchlopek wrote: > From: Przemek Kitszel > > Add Tx hang devlink health reporter, see struct ice_tx_hang_event to see > what is reported. > > Subsequent commits will extend it by more info, for now it dumps > descriptors with little metadata. > > Signed-off-by: Przemek Kitszel > Reviewed-by: Igor Bagnucki > Reviewed-by: Wojciech Drewek > Signed-off-by: Mateusz Polchlopek ... > +/** > + * ice_fmsg_put_ptr - put hex value of pointer into fmsg > + * > + * @fmsg: devlink fmsg under construction > + * @name: name to pass > + * @ptr: 64 bit value to print as hex and put into fmsg > + */ > +static void ice_fmsg_put_ptr(struct devlink_fmsg *fmsg, const char *name, > + void *ptr) > +{ > + char buf[sizeof(ptr) * 3]; > + > + sprintf(buf, "%p", ptr); > + devlink_fmsg_put(fmsg, name, buf); > +} ... > +static int ice_tx_hang_reporter_dump(struct devlink_health_reporter *reporter, > + struct devlink_fmsg *fmsg, void *priv_ctx, > + struct netlink_ext_ack *extack) > +{ > + struct ice_tx_hang_event *event = priv_ctx; > + > + devlink_fmsg_obj_nest_start(fmsg); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, head); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, intr); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, vsi_num); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, queue); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, next_to_clean); > + ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, event, next_to_use); > + devlink_fmsg_put(fmsg, "irq-mapping", event->tx_ring->q_vector->name); > + ice_fmsg_put_ptr(fmsg, "desc-ptr", event->tx_ring->desc); > + ice_fmsg_put_ptr(fmsg, "dma-ptr", (void *)event->tx_ring->dma); As reported by the kernel test robot, GCC 13 complains about this cast: .../devlink_health.c: In function 'ice_tx_hang_reporter_dump': .../devlink_health.c:76:43: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 76 | ice_fmsg_put_ptr(fmsg, "dma-ptr", (void *)event->tx_ring->dma); | Perhaps a good solution is to add a helper similar to ice_fmsg_put_ptr, but which takes a dma_buf_t rather than a void * as it's last argument. > + devlink_fmsg_binary_pair_put(fmsg, "desc", event->tx_ring->desc, > + size_mul(event->tx_ring->count, > + sizeof(struct ice_tx_desc))); > + devlink_fmsg_obj_nest_end(fmsg); > + > + return 0; > +}