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From: "Rafał Miłecki" <zajec5@gmail.com>
To: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Ray Jui <rjui@broadcom.com>, Bjorn Helgaas <bhelgaas@google.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Linux PCI <linux-pci@vger.kernel.org>,
	Scott Branden <sbranden@broadcom.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>
Subject: Re: [PATCH 2/2] PCI: iproc: add bcma pcie driver
Date: Wed, 13 May 2015 08:27:47 +0200	[thread overview]
Message-ID: <CACna6rxVpJ-4b_5jG91JN62jQHh8u=QaLpO+_7J9mFr+_ScPaA@mail.gmail.com> (raw)
In-Reply-To: <1431465781-10753-3-git-send-email-hauke@hauke-m.de>

On 12 May 2015 at 23:23, Hauke Mehrtens <hauke@hauke-m.de> wrote:
> This driver adds support for the PCIe 2.0 controller found on the bcma
> bus. This controller can be found on (mostly) all Broadcom BCM470X /
> BCM5301X ARM SoCs.
>
> The driver found in the Broadcom SDK does some more stuff, like setting
> up some DMA memory areas, chaining MPS and MRRS to 512 and also some
> PHY changes like "improving" the PCIe jitter and doing some special
> initializations for the 3rd PCIe port.
>
> This was tested on a bcm4708 board with 2 PCIe ports and wireless cards
> connected to them.
>
> PCI_DOMAINS is needed by this driver, because normally there is more
> than one PCIe controller and without PCI_DOMAINS only the first
> controller gets registered.
> This controller gets 6 IRQs, the last one is trigged by all IRQ events.
>
> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Acked-by: Rafał Miłecki <zajec5@gmail.com>


> +static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
> +{
> +       struct iproc_pcie *pcie;
> +       LIST_HEAD(res);
> +       struct resource res_mem;
> +       int ret;
> +
> +       pcie = devm_kzalloc(&bdev->dev, sizeof(*pcie), GFP_KERNEL);
> +       if (!pcie)
> +               return -ENOMEM;
> +
> +       pcie->dev = &bdev->dev;
> +       bcma_set_drvdata(bdev, pcie);
> +
> +       pcie->base = bdev->io_addr;
> +
> +       res_mem.start = bdev->addr_s[0];
> +       res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
> +       res_mem.name = "PCIe MEM space";
> +       res_mem.flags = IORESOURCE_MEM;
> +       pci_add_resource(&res, &res_mem);
> +
> +       pcie->resources = &res;
> +
> +       pcie->map_irq = iproc_pcie_bcma_map_irq;
> +
> +       ret = iproc_pcie_setup(pcie);

I think I don't like this part of iproc design. It lefts
pcie->resources pointing to some random memory after the setup/probe
are done. Guess it should be a separated parameter or sth.

The patch is still OK, I just refer to generic iproc possible issue.

WARNING: multiple messages have this Message-ID
From: zajec5@gmail.com (Rafał Miłecki)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] PCI: iproc: add bcma pcie driver
Date: Wed, 13 May 2015 08:27:47 +0200	[thread overview]
Message-ID: <CACna6rxVpJ-4b_5jG91JN62jQHh8u=QaLpO+_7J9mFr+_ScPaA@mail.gmail.com> (raw)
In-Reply-To: <1431465781-10753-3-git-send-email-hauke@hauke-m.de>

On 12 May 2015 at 23:23, Hauke Mehrtens <hauke@hauke-m.de> wrote:
> This driver adds support for the PCIe 2.0 controller found on the bcma
> bus. This controller can be found on (mostly) all Broadcom BCM470X /
> BCM5301X ARM SoCs.
>
> The driver found in the Broadcom SDK does some more stuff, like setting
> up some DMA memory areas, chaining MPS and MRRS to 512 and also some
> PHY changes like "improving" the PCIe jitter and doing some special
> initializations for the 3rd PCIe port.
>
> This was tested on a bcm4708 board with 2 PCIe ports and wireless cards
> connected to them.
>
> PCI_DOMAINS is needed by this driver, because normally there is more
> than one PCIe controller and without PCI_DOMAINS only the first
> controller gets registered.
> This controller gets 6 IRQs, the last one is trigged by all IRQ events.
>
> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Acked-by: Rafa? Mi?ecki <zajec5@gmail.com>


> +static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
> +{
> +       struct iproc_pcie *pcie;
> +       LIST_HEAD(res);
> +       struct resource res_mem;
> +       int ret;
> +
> +       pcie = devm_kzalloc(&bdev->dev, sizeof(*pcie), GFP_KERNEL);
> +       if (!pcie)
> +               return -ENOMEM;
> +
> +       pcie->dev = &bdev->dev;
> +       bcma_set_drvdata(bdev, pcie);
> +
> +       pcie->base = bdev->io_addr;
> +
> +       res_mem.start = bdev->addr_s[0];
> +       res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
> +       res_mem.name = "PCIe MEM space";
> +       res_mem.flags = IORESOURCE_MEM;
> +       pci_add_resource(&res, &res_mem);
> +
> +       pcie->resources = &res;
> +
> +       pcie->map_irq = iproc_pcie_bcma_map_irq;
> +
> +       ret = iproc_pcie_setup(pcie);

I think I don't like this part of iproc design. It lefts
pcie->resources pointing to some random memory after the setup/probe
are done. Guess it should be a separated parameter or sth.

The patch is still OK, I just refer to generic iproc possible issue.

  parent reply	other threads:[~2015-05-13  6:27 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-12 21:22 [PATCH 0/2] PCI: iproc: add bcma PCIe 2.0 controller Hauke Mehrtens
2015-05-12 21:22 ` Hauke Mehrtens
2015-05-12 21:23 ` [PATCH 1/2] PCI: iproc: make of_irq_parse_and_map_pci() configurable Hauke Mehrtens
2015-05-12 21:23   ` Hauke Mehrtens
2015-05-12 22:14   ` Ray Jui
2015-05-12 22:14     ` Ray Jui
2015-05-12 21:23 ` [PATCH 2/2] PCI: iproc: add bcma pcie driver Hauke Mehrtens
2015-05-12 21:23   ` Hauke Mehrtens
2015-05-12 22:18   ` Ray Jui
2015-05-12 22:18     ` Ray Jui
2015-05-13  6:27   ` Rafał Miłecki [this message]
2015-05-13  6:27     ` Rafał Miłecki
2015-05-13 15:56     ` Ray Jui
2015-05-13 15:56       ` Ray Jui
2015-05-13 16:19       ` Rafał Miłecki
2015-05-13 16:19         ` Rafał Miłecki
2015-05-13 16:30         ` Ray Jui
2015-05-13 16:30           ` Ray Jui
2015-05-13 18:43           ` Hauke Mehrtens
2015-05-13 18:43             ` Hauke Mehrtens
2015-05-19 23:14             ` Bjorn Helgaas
2015-05-19 23:14               ` Bjorn Helgaas
2015-05-19 23:17               ` Ray Jui
2015-05-19 23:17                 ` Ray Jui
2015-05-20  5:27   ` Rafał Miłecki
2015-05-20  5:27     ` Rafał Miłecki
2015-05-12 22:05 ` [PATCH 0/2] PCI: iproc: add bcma PCIe 2.0 controller Ray Jui
2015-05-12 22:05   ` Ray Jui
2015-05-20 14:52 ` Bjorn Helgaas
2015-05-20 14:52   ` Bjorn Helgaas

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