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Message-Id: <f550af38-35b8-0e77-0833-e23ab2c4aa76@au1.ibm.com>
Date: Tue, 30 Apr 2019 14:25:44 +1000
From: Andrew Donnellan <andrew.donnellan@....ibm.com>
To: "Alastair D'Silva" <alastair@....ibm.com>, alastair@...ilva.org
Cc: Frederic Barrat <fbarrat@...ux.ibm.com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v4 2/7] ocxl: Don't pass pci_dev around
On 27/3/19 4:31 pm, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@...ilva.org>
>
> This data is already available in a struct
>
> Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
Acked-by: Andrew Donnellan <andrew.donnellan@....ibm.com>
> ---
> drivers/misc/ocxl/core.c | 38 +++++++++++++++++++++-----------------
> 1 file changed, 21 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/misc/ocxl/core.c b/drivers/misc/ocxl/core.c
> index 1a4411b72d35..2f2fe12eac1e 100644
> --- a/drivers/misc/ocxl/core.c
> +++ b/drivers/misc/ocxl/core.c
> @@ -66,10 +66,11 @@ static int set_afu_device(struct ocxl_afu *afu, const char *location)
> return rc;
> }
>
> -static int assign_afu_actag(struct ocxl_afu *afu, struct pci_dev *dev)
> +static int assign_afu_actag(struct ocxl_afu *afu)
> {
> struct ocxl_fn *fn = afu->fn;
> int actag_count, actag_offset;
> + struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
>
> /*
> * if there were not enough actags for the function, each afu
> @@ -79,16 +80,16 @@ static int assign_afu_actag(struct ocxl_afu *afu, struct pci_dev *dev)
> fn->actag_enabled / fn->actag_supported;
> actag_offset = ocxl_actag_afu_alloc(fn, actag_count);
> if (actag_offset < 0) {
> - dev_err(&afu->dev, "Can't allocate %d actags for AFU: %d\n",
> + dev_err(&pci_dev->dev, "Can't allocate %d actags for AFU: %d\n",
> actag_count, actag_offset);
> return actag_offset;
> }
> afu->actag_base = fn->actag_base + actag_offset;
> afu->actag_enabled = actag_count;
>
> - ocxl_config_set_afu_actag(dev, afu->config.dvsec_afu_control_pos,
> + ocxl_config_set_afu_actag(pci_dev, afu->config.dvsec_afu_control_pos,
> afu->actag_base, afu->actag_enabled);
> - dev_dbg(&afu->dev, "actag base=%d enabled=%d\n",
> + dev_dbg(&pci_dev->dev, "actag base=%d enabled=%d\n",
> afu->actag_base, afu->actag_enabled);
> return 0;
> }
> @@ -103,10 +104,11 @@ static void reclaim_afu_actag(struct ocxl_afu *afu)
> ocxl_actag_afu_free(afu->fn, start_offset, size);
> }
>
> -static int assign_afu_pasid(struct ocxl_afu *afu, struct pci_dev *dev)
> +static int assign_afu_pasid(struct ocxl_afu *afu)
> {
> struct ocxl_fn *fn = afu->fn;
> int pasid_count, pasid_offset;
> + struct pci_dev *pci_dev = to_pci_dev(fn->dev.parent);
>
> /*
> * We only support the case where the function configuration
> @@ -115,7 +117,7 @@ static int assign_afu_pasid(struct ocxl_afu *afu, struct pci_dev *dev)
> pasid_count = 1 << afu->config.pasid_supported_log;
> pasid_offset = ocxl_pasid_afu_alloc(fn, pasid_count);
> if (pasid_offset < 0) {
> - dev_err(&afu->dev, "Can't allocate %d PASIDs for AFU: %d\n",
> + dev_err(&pci_dev->dev, "Can't allocate %d PASIDs for AFU: %d\n",
> pasid_count, pasid_offset);
> return pasid_offset;
> }
> @@ -123,10 +125,10 @@ static int assign_afu_pasid(struct ocxl_afu *afu, struct pci_dev *dev)
> afu->pasid_count = 0;
> afu->pasid_max = pasid_count;
>
> - ocxl_config_set_afu_pasid(dev, afu->config.dvsec_afu_control_pos,
> + ocxl_config_set_afu_pasid(pci_dev, afu->config.dvsec_afu_control_pos,
> afu->pasid_base,
> afu->config.pasid_supported_log);
> - dev_dbg(&afu->dev, "PASID base=%d, enabled=%d\n",
> + dev_dbg(&pci_dev->dev, "PASID base=%d, enabled=%d\n",
> afu->pasid_base, pasid_count);
> return 0;
> }
> @@ -172,9 +174,10 @@ static void release_fn_bar(struct ocxl_fn *fn, int bar)
> WARN_ON(fn->bar_used[idx] < 0);
> }
>
> -static int map_mmio_areas(struct ocxl_afu *afu, struct pci_dev *dev)
> +static int map_mmio_areas(struct ocxl_afu *afu)
> {
> int rc;
> + struct pci_dev *pci_dev = to_pci_dev(afu->fn->dev.parent);
>
> rc = reserve_fn_bar(afu->fn, afu->config.global_mmio_bar);
> if (rc)
> @@ -187,10 +190,10 @@ static int map_mmio_areas(struct ocxl_afu *afu, struct pci_dev *dev)
> }
>
> afu->global_mmio_start =
> - pci_resource_start(dev, afu->config.global_mmio_bar) +
> + pci_resource_start(pci_dev, afu->config.global_mmio_bar) +
> afu->config.global_mmio_offset;
> afu->pp_mmio_start =
> - pci_resource_start(dev, afu->config.pp_mmio_bar) +
> + pci_resource_start(pci_dev, afu->config.pp_mmio_bar) +
> afu->config.pp_mmio_offset;
>
> afu->global_mmio_ptr = ioremap(afu->global_mmio_start,
> @@ -198,7 +201,7 @@ static int map_mmio_areas(struct ocxl_afu *afu, struct pci_dev *dev)
> if (!afu->global_mmio_ptr) {
> release_fn_bar(afu->fn, afu->config.pp_mmio_bar);
> release_fn_bar(afu->fn, afu->config.global_mmio_bar);
> - dev_err(&dev->dev, "Error mapping global mmio area\n");
> + dev_err(&pci_dev->dev, "Error mapping global mmio area\n");
> return -ENOMEM;
> }
>
> @@ -234,17 +237,17 @@ static int configure_afu(struct ocxl_afu *afu, u8 afu_idx, struct pci_dev *dev)
> if (rc)
> return rc;
>
> - rc = assign_afu_actag(afu, dev);
> + rc = assign_afu_actag(afu);
> if (rc)
> return rc;
>
> - rc = assign_afu_pasid(afu, dev);
> + rc = assign_afu_pasid(afu);
> if (rc) {
> reclaim_afu_actag(afu);
> return rc;
> }
>
> - rc = map_mmio_areas(afu, dev);
> + rc = map_mmio_areas(afu);
> if (rc) {
> reclaim_afu_pasid(afu);
> reclaim_afu_actag(afu);
> @@ -331,7 +334,7 @@ void remove_afu(struct ocxl_afu *afu)
> device_unregister(&afu->dev);
> }
>
> -static struct ocxl_fn *alloc_function(struct pci_dev *dev)
> +static struct ocxl_fn *alloc_function(void)
> {
> struct ocxl_fn *fn;
>
> @@ -342,6 +345,7 @@ static struct ocxl_fn *alloc_function(struct pci_dev *dev)
> INIT_LIST_HEAD(&fn->afu_list);
> INIT_LIST_HEAD(&fn->pasid_list);
> INIT_LIST_HEAD(&fn->actag_list);
> +
> return fn;
> }
>
> @@ -491,7 +495,7 @@ struct ocxl_fn *init_function(struct pci_dev *dev)
> struct ocxl_fn *fn;
> int rc;
>
> - fn = alloc_function(dev);
> + fn = alloc_function();
> if (!fn)
> return ERR_PTR(-ENOMEM);
>
>
--
Andrew Donnellan OzLabs, ADL Canberra
andrew.donnellan@....ibm.com IBM Australia Limited
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