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From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: <linux-cxl@vger.kernel.org>, <vishal.l.verma@intel.com>,
	<alison.schofield@intel.com>, <nvdimm@lists.linux.dev>,
	<ira.weiny@intel.com>, <ben.widawsky@intel.com>
Subject: Re: [PATCH v3 12/28] libnvdimm/labels: Introduce the concept of multi-range namespace labels
Date: Thu, 2 Sep 2021 17:43:53 +0100	[thread overview]
Message-ID: <20210902174353.00001f7c@Huawei.com> (raw)
In-Reply-To: <162982118939.1124374.9504087573920499391.stgit@dwillia2-desk3.amr.corp.intel.com>

On Tue, 24 Aug 2021 09:06:29 -0700
Dan Williams <dan.j.williams@intel.com> wrote:

> The CXL specification defines a mechanism for namespaces to be comprised
> of multiple dis-contiguous ranges. Introduce that concept to the legacy
> NVDIMM namespace implementation with a new nsl_set_nrange() helper, that
> sets the number of ranges to 1. Once the NVDIMM subsystem supports CXL
> labels and updates its namespace capacity provisioning for
> dis-contiguous support nsl_set_nrange() can be updated, but in the
> meantime CXL label validation requires nrange be non-zero.
> 
> Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
FWIW which may well be mostly so I remember to skip this one
when reading v4+ if you need them.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  drivers/nvdimm/label.c |    1 +
>  drivers/nvdimm/nd.h    |   13 +++++++++++++
>  2 files changed, 14 insertions(+)
> 
> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
> index e8e0d3e409a2..7abeb1233404 100644
> --- a/drivers/nvdimm/label.c
> +++ b/drivers/nvdimm/label.c
> @@ -901,6 +901,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
>  	nsl_set_name(ndd, nd_label, nspm->alt_name);
>  	nsl_set_flags(ndd, nd_label, flags);
>  	nsl_set_nlabel(ndd, nd_label, nd_region->ndr_mappings);
> +	nsl_set_nrange(ndd, nd_label, 1);
>  	nsl_set_position(ndd, nd_label, pos);
>  	nsl_set_isetcookie(ndd, nd_label, cookie);
>  	nsl_set_rawsize(ndd, nd_label, resource_size(res));
> diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
> index 036638bdb7e3..d57f95a48fe1 100644
> --- a/drivers/nvdimm/nd.h
> +++ b/drivers/nvdimm/nd.h
> @@ -164,6 +164,19 @@ static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd,
>  	nd_label->nlabel = __cpu_to_le16(nlabel);
>  }
>  
> +static inline u16 nsl_get_nrange(struct nvdimm_drvdata *ndd,
> +				 struct nd_namespace_label *nd_label)
> +{
> +	/* EFI labels do not have an nrange field */
> +	return 1;
> +}
> +
> +static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd,
> +				  struct nd_namespace_label *nd_label,
> +				  u16 nrange)
> +{
> +}
> +
>  static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
>  				  struct nd_namespace_label *nd_label)
>  {
> 


  reply	other threads:[~2021-09-02 16:43 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 16:05 [PATCH v3 00/28] cxl_test: Enable CXL Topology and UAPI regression tests Dan Williams
2021-08-24 16:05 ` [PATCH v3 01/28] libnvdimm/labels: Introduce getters for namespace label fields Dan Williams
2021-08-24 16:05 ` [PATCH v3 02/28] libnvdimm/labels: Add isetcookie validation helper Dan Williams
2021-08-24 16:05 ` [PATCH v3 03/28] libnvdimm/labels: Introduce label setter helpers Dan Williams
2021-08-24 16:05 ` [PATCH v3 04/28] libnvdimm/labels: Add a checksum calculation helper Dan Williams
2021-08-24 16:05 ` [PATCH v3 05/28] libnvdimm/labels: Add blk isetcookie set / validation helpers Dan Williams
2021-08-24 16:05 ` [PATCH v3 06/28] libnvdimm/labels: Add blk special cases for nlabel and position helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 07/28] libnvdimm/labels: Add type-guid helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 08/28] libnvdimm/labels: Add claim class helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 09/28] libnvdimm/labels: Add address-abstraction uuid definitions Dan Williams
2021-08-24 16:06 ` [PATCH v3 10/28] libnvdimm/labels: Add uuid helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 11/28] libnvdimm/label: Add a helper for nlabel validation Dan Williams
2021-09-02 16:37   ` Jonathan Cameron
2021-08-24 16:06 ` [PATCH v3 12/28] libnvdimm/labels: Introduce the concept of multi-range namespace labels Dan Williams
2021-09-02 16:43   ` Jonathan Cameron [this message]
2021-08-24 16:06 ` [PATCH v3 13/28] libnvdimm/label: Define CXL region labels Dan Williams
2021-09-02 16:36   ` Jonathan Cameron
2021-09-02 16:41     ` Jonathan Cameron
2021-09-03  3:58       ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 14/28] libnvdimm/labels: Introduce CXL labels Dan Williams
2021-09-03 17:00   ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 15/28] cxl/pci: Make 'struct cxl_mem' device type generic Dan Williams
2021-09-02 16:55   ` Jonathan Cameron
2021-09-02 17:34     ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 16/28] cxl/mbox: Introduce the mbox_send operation Dan Williams
2021-09-02 17:07   ` Jonathan Cameron
2021-08-24 16:06 ` [PATCH v3 17/28] cxl/mbox: Move mailbox and other non-PCI specific infrastructure to the core Dan Williams
2021-09-02 17:56   ` Jonathan Cameron
2021-09-02 18:56     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 18/28] cxl/pci: Use module_pci_driver Dan Williams
2021-09-02 17:58   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 19/28] cxl/mbox: Convert 'enabled_cmds' to DECLARE_BITMAP Dan Williams
2021-09-02 17:59   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 20/28] cxl/mbox: Add exclusive kernel command support Dan Williams
2021-09-02 18:09   ` Jonathan Cameron
2021-09-03 20:47     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 21/28] cxl/pmem: Translate NVDIMM label commands to CXL label commands Dan Williams
2021-09-02 18:22   ` Jonathan Cameron
2021-09-03 21:09     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 22/28] cxl/pmem: Add support for multiple nvdimm-bridge objects Dan Williams
2021-09-03 11:15   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 23/28] cxl/acpi: Do not add DSDT disabled ACPI0016 host bridge ports Dan Williams
2021-09-02 18:30   ` Jonathan Cameron
2021-09-03 17:51     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 24/28] tools/testing/cxl: Introduce a mocked-up CXL port hierarchy Dan Williams
2021-09-03 12:52   ` Jonathan Cameron
2021-09-03 21:49     ` Dan Williams
2021-09-06  8:32       ` Jonathan Cameron
2021-09-07 15:57         ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 25/28] cxl/bus: Populate the target list at decoder create Dan Williams
2021-09-03 12:59   ` Jonathan Cameron
2021-09-03 22:43     ` Dan Williams
2021-09-06  8:52       ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 26/28] cxl/mbox: Move command definitions to common location Dan Williams
2021-09-03 13:04   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 27/28] tools/testing/cxl: Introduce a mock memory device + driver Dan Williams
2021-09-03 13:21   ` Jonathan Cameron
2021-09-03 23:33     ` Dan Williams
2021-09-06  8:57       ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 28/28] cxl/core: Split decoder setup into alloc + add Dan Williams
2021-09-03 13:33   ` Jonathan Cameron
2021-09-03 16:26     ` Dan Williams
2021-09-03 18:01       ` Jonathan Cameron
2021-09-04  0:27         ` Dan Williams

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