From: Frederic Barrat <fbarrat@linux.ibm.com>
To: "Alastair D'Silva" <alastair@au1.ibm.com>, alastair@d-silva.org
Cc: Greg Kurz <groug@kaod.org>,
Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v3 4/7] ocxl: Allow external drivers to use OpenCAPI contexts
Date: Mon, 25 Mar 2019 16:13:45 +0100 [thread overview]
Message-ID: <f59099b1-9f6e-a465-552a-41fa98c17634@linux.ibm.com> (raw)
In-Reply-To: <20190325054438.15022-5-alastair@au1.ibm.com>
Le 25/03/2019 à 06:44, Alastair D'Silva a écrit :
> From: Alastair D'Silva <alastair@d-silva.org>
>
> Most OpenCAPI operations require a valid context, so
> exposing these functions to external drivers is necessary.
>
> Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
> Reviewed-by: Greg Kurz <groug@kaod.org>
> ---
See comment on previous patch regarding merging ocxl_context_alloc() and
ocxl_context_init(), it would impact the exported symbols.
Fred
> drivers/misc/ocxl/context.c | 9 +++++--
> drivers/misc/ocxl/file.c | 2 +-
> drivers/misc/ocxl/ocxl_internal.h | 6 -----
> include/misc/ocxl.h | 45 +++++++++++++++++++++++++++++++
> 4 files changed, 53 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/misc/ocxl/context.c b/drivers/misc/ocxl/context.c
> index c73a859d2224..8b97b0f19db8 100644
> --- a/drivers/misc/ocxl/context.c
> +++ b/drivers/misc/ocxl/context.c
> @@ -8,6 +8,7 @@ struct ocxl_context *ocxl_context_alloc(void)
> {
> return kzalloc(sizeof(struct ocxl_context), GFP_KERNEL);
> }
> +EXPORT_SYMBOL_GPL(ocxl_context_alloc);
>
> int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
> struct address_space *mapping)
> @@ -43,6 +44,7 @@ int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
> ocxl_afu_get(afu);
> return 0;
> }
> +EXPORT_SYMBOL_GPL(ocxl_context_init);
>
> /*
> * Callback for when a translation fault triggers an error
> @@ -63,7 +65,7 @@ static void xsl_fault_error(void *data, u64 addr, u64 dsisr)
> wake_up_all(&ctx->events_wq);
> }
>
> -int ocxl_context_attach(struct ocxl_context *ctx, u64 amr)
> +int ocxl_context_attach(struct ocxl_context *ctx, u64 amr, struct mm_struct *mm)
> {
> int rc;
>
> @@ -75,7 +77,7 @@ int ocxl_context_attach(struct ocxl_context *ctx, u64 amr)
> }
>
> rc = ocxl_link_add_pe(ctx->afu->fn->link, ctx->pasid,
> - current->mm->context.id, ctx->tidr, amr, current->mm,
> + mm->context.id, ctx->tidr, amr, mm,
> xsl_fault_error, ctx);
> if (rc)
> goto out;
> @@ -85,6 +87,7 @@ int ocxl_context_attach(struct ocxl_context *ctx, u64 amr)
> mutex_unlock(&ctx->status_mutex);
> return rc;
> }
> +EXPORT_SYMBOL_GPL(ocxl_context_attach);
>
> static vm_fault_t map_afu_irq(struct vm_area_struct *vma, unsigned long address,
> u64 offset, struct ocxl_context *ctx)
> @@ -243,6 +246,7 @@ int ocxl_context_detach(struct ocxl_context *ctx)
> }
> return 0;
> }
> +EXPORT_SYMBOL_GPL(ocxl_context_detach);
>
> void ocxl_context_detach_all(struct ocxl_afu *afu)
> {
> @@ -280,3 +284,4 @@ void ocxl_context_free(struct ocxl_context *ctx)
> ocxl_afu_put(ctx->afu);
> kfree(ctx);
> }
> +EXPORT_SYMBOL_GPL(ocxl_context_free);
> diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c
> index e6e6121cd9a3..e51578186fd4 100644
> --- a/drivers/misc/ocxl/file.c
> +++ b/drivers/misc/ocxl/file.c
> @@ -94,7 +94,7 @@ static long afu_ioctl_attach(struct ocxl_context *ctx,
> return -EINVAL;
>
> amr = arg.amr & mfspr(SPRN_UAMOR);
> - rc = ocxl_context_attach(ctx, amr);
> + rc = ocxl_context_attach(ctx, amr, current->mm);
> return rc;
> }
>
> diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h
> index e04e547df29e..cda1e7667fc8 100644
> --- a/drivers/misc/ocxl/ocxl_internal.h
> +++ b/drivers/misc/ocxl/ocxl_internal.h
> @@ -130,15 +130,9 @@ int ocxl_config_check_afu_index(struct pci_dev *dev,
> */
> int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid);
>
> -struct ocxl_context *ocxl_context_alloc(void);
> -int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
> - struct address_space *mapping);
> -int ocxl_context_attach(struct ocxl_context *ctx, u64 amr);
> int ocxl_context_mmap(struct ocxl_context *ctx,
> struct vm_area_struct *vma);
> -int ocxl_context_detach(struct ocxl_context *ctx);
> void ocxl_context_detach_all(struct ocxl_afu *afu);
> -void ocxl_context_free(struct ocxl_context *ctx);
>
> int ocxl_sysfs_register_afu(struct ocxl_afu *afu);
> void ocxl_sysfs_unregister_afu(struct ocxl_afu *afu);
> diff --git a/include/misc/ocxl.h b/include/misc/ocxl.h
> index 8bafd748e380..a8fe0ce4ea67 100644
> --- a/include/misc/ocxl.h
> +++ b/include/misc/ocxl.h
> @@ -116,6 +116,51 @@ const struct ocxl_fn_config *ocxl_function_config(struct ocxl_fn *fn);
> */
> void ocxl_function_close(struct ocxl_fn *fn);
>
> +// Context allocation
> +
> +/**
> + * Allocate space for a new OpenCAPI context
> + *
> + * Returns NULL on failure
> + */
> +struct ocxl_context *ocxl_context_alloc(void);
> +
> +/**
> + * Initialize an OpenCAPI context
> + *
> + * @ctx: The OpenCAPI context to initialize
> + * @afu: The AFU the context belongs to
> + * @mapping: The mapping to unmap when the context is closed (may be NULL)
> + */
> +int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
> + struct address_space *mapping);
> +
> +/**
> + * Free an OpenCAPI context
> + *
> + * @ctx: The OpenCAPI context to free
> + */
> +void ocxl_context_free(struct ocxl_context *ctx);
> +
> +/**
> + * Grant access to an MM to an OpenCAPI context
> + * @ctx: The OpenCAPI context to attach
> + * @amr: The value of the AMR register to restrict access
> + * @mm: The mm to attach to the context
> + *
> + * Returns 0 on success, negative on failure
> + */
> +int ocxl_context_attach(struct ocxl_context *ctx, u64 amr,
> + struct mm_struct *mm);
> +
> +/**
> + * Detach an MM from an OpenCAPI context
> + * @ctx: The OpenCAPI context to attach
> + *
> + * Returns 0 on success, negative on failure
> + */
> +int ocxl_context_detach(struct ocxl_context *ctx);
> +
> // AFU Metadata
>
> /**
>
next prev parent reply other threads:[~2019-03-25 15:13 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-27 4:57 [PATCH 0/5] ocxl: OpenCAPI Cleanup Alastair D'Silva
2019-02-27 4:57 ` [PATCH 1/5] ocxl: Rename struct link to ocxl_link Alastair D'Silva
2019-02-27 7:15 ` Andrew Donnellan
2019-02-27 7:34 ` Alastair D'Silva
2019-02-27 7:54 ` Andrew Donnellan
2019-02-27 8:04 ` Alastair D'Silva
2019-02-27 8:18 ` Andrew Donnellan
2019-02-27 13:45 ` Frederic Barrat
2019-02-27 13:59 ` Greg Kurz
2019-02-27 13:53 ` Greg Kurz
2019-02-27 4:57 ` [PATCH 2/5] ocxl: Clean up printf formats Alastair D'Silva
2019-02-27 13:40 ` Frederic Barrat
2019-02-28 5:02 ` Andrew Donnellan
2019-03-02 1:13 ` Joe Perches
2019-02-27 4:57 ` [PATCH 3/5] ocxl: read_pasid never returns an error, so make it void Alastair D'Silva
2019-02-27 13:25 ` Frederic Barrat
2019-02-28 5:03 ` Andrew Donnellan
2019-02-27 4:57 ` [PATCH 4/5] ocxl: Remove superfluous 'extern' from headers Alastair D'Silva
2019-02-27 13:36 ` Frederic Barrat
2019-02-28 5:05 ` Andrew Donnellan
2019-02-27 4:57 ` [PATCH 5/5] ocxl: Remove some unused exported symbols Alastair D'Silva
2019-02-27 13:39 ` Frederic Barrat
2019-02-28 5:23 ` Andrew Donnellan
2019-03-13 4:06 ` [PATCH v2 0/5] ocxl: OpenCAPI Cleanup Alastair D'Silva
2019-03-13 4:06 ` [PATCH 1/5] ocxl: Rename struct link to ocxl_link Alastair D'Silva
2019-03-15 6:58 ` Andrew Donnellan
2019-03-13 4:06 ` [PATCH 2/5] ocxl: Clean up printf formats Alastair D'Silva
2019-03-13 8:24 ` Greg Kurz
2019-03-14 4:58 ` Andrew Donnellan
2019-03-13 4:06 ` [PATCH 3/5] ocxl: read_pasid never returns an error, so make it void Alastair D'Silva
2019-03-14 4:59 ` Andrew Donnellan
2019-03-13 4:07 ` [PATCH 4/5] ocxl: Remove superfluous 'extern' from headers Alastair D'Silva
2019-03-13 8:28 ` Greg Kurz
2019-03-14 5:08 ` Andrew Donnellan
2019-03-13 4:07 ` [PATCH 5/5] ocxl: Remove some unused exported symbols Alastair D'Silva
2019-03-13 9:10 ` Greg Kurz
2019-03-14 2:23 ` Alastair D'Silva
2019-03-14 6:50 ` Greg Kurz
2019-03-15 4:49 ` Andrew Donnellan
2019-03-15 5:07 ` Andrew Donnellan
2019-03-20 5:34 ` [PATCH v3 0/5] ocxl: OpenCAPI Cleanup Alastair D'Silva
2019-03-20 5:34 ` [PATCH v3 1/5] ocxl: Rename struct link to ocxl_link Alastair D'Silva
2019-03-20 5:34 ` [PATCH v3 2/5] ocxl: Clean up printf formats Alastair D'Silva
2019-03-20 17:24 ` Joe Perches
2019-03-20 5:34 ` [PATCH v3 3/5] ocxl: read_pasid never returns an error, so make it void Alastair D'Silva
2019-03-20 5:34 ` [PATCH v3 4/5] ocxl: Remove superfluous 'extern' from headers Alastair D'Silva
2019-03-20 5:34 ` [PATCH v3 5/5] ocxl: Remove some unused exported symbols Alastair D'Silva
2019-03-25 5:34 ` [PATCH v4 0/4] ocxl: OpenCAPI Cleanup Alastair D'Silva
2019-03-25 5:34 ` [PATCH v4 1/4] ocxl: Rename struct link to ocxl_link Alastair D'Silva
2019-04-03 14:18 ` Frederic Barrat
2019-04-05 7:05 ` Andrew Donnellan
2019-05-03 6:59 ` Michael Ellerman
2019-03-25 5:34 ` [PATCH v4 2/4] ocxl: read_pasid never returns an error, so make it void Alastair D'Silva
2019-04-03 14:20 ` Frederic Barrat
2019-04-05 7:05 ` Andrew Donnellan
2019-03-25 5:34 ` [PATCH v4 3/4] ocxl: Remove superfluous 'extern' from headers Alastair D'Silva
2019-03-25 16:55 ` Greg Kurz
2019-04-03 14:20 ` Frederic Barrat
2019-04-05 7:09 ` Andrew Donnellan
2019-03-25 5:34 ` [PATCH v4 4/4] ocxl: Remove some unused exported symbols Alastair D'Silva
2019-03-25 16:57 ` Greg Kurz
2019-04-03 14:23 ` Frederic Barrat
2019-04-05 7:28 ` Andrew Donnellan
2019-03-25 16:49 ` [PATCH v4 0/4] ocxl: OpenCAPI Cleanup Greg Kurz
2019-03-25 17:34 ` Frederic Barrat
2019-03-25 21:45 ` Alastair D'Silva
2019-03-25 5:44 ` [PATCH v3 0/7] Refactor OCXL driver to allow external drivers to use it Alastair D'Silva
2019-03-25 5:44 ` [PATCH v3 1/7] ocxl: Split pci.c Alastair D'Silva
2019-03-25 10:01 ` Frederic Barrat
2019-03-25 5:44 ` [PATCH v3 2/7] ocxl: Don't pass pci_dev around Alastair D'Silva
2019-03-25 10:04 ` Frederic Barrat
2019-03-25 5:44 ` [PATCH v3 3/7] ocxl: Create a clear delineation between ocxl backend & frontend Alastair D'Silva
2019-03-25 15:11 ` Frederic Barrat
2019-03-25 5:44 ` [PATCH v3 4/7] ocxl: Allow external drivers to use OpenCAPI contexts Alastair D'Silva
2019-03-25 15:13 ` Frederic Barrat [this message]
2019-03-25 5:44 ` [PATCH v3 5/7] ocxl: afu_irq only deals with IRQ IDs, not offsets Alastair D'Silva
2019-03-25 15:24 ` Frederic Barrat
2019-03-25 5:44 ` [PATCH v3 6/7] ocxl: move event_fd handling to frontend Alastair D'Silva
2019-03-25 15:41 ` Frederic Barrat
2019-03-25 5:44 ` [PATCH v3 7/7] ocxl: Provide global MMIO accessors for external drivers Alastair D'Silva
2019-03-25 15:49 ` Frederic Barrat
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f59099b1-9f6e-a465-552a-41fa98c17634@linux.ibm.com \
--to=fbarrat@linux.ibm.com \
--cc=alastair@au1.ibm.com \
--cc=alastair@d-silva.org \
--cc=andrew.donnellan@au1.ibm.com \
--cc=arnd@arndb.de \
--cc=gregkh@linuxfoundation.org \
--cc=groug@kaod.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).