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Message-ID: <4E4A2717.7050109@ge.com>
Date: Tue, 16 Aug 2011 09:15:19 +0100
From: Martyn Welch <martyn.welch@...com>
To: Manohar Vanga <manohar.vanga@...n.ch>
CC: gregkh@...e.de, cota@...ap.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] staging: vme: make [alloc|free]_consistent bridge
specific
On 12/08/11 11:30, Manohar Vanga wrote:
> Make PCI dependent functions ([alloc|free]_consistent() in
> 'vme.c') bridge specific. By removing the dependency of the
> VME bridge framework on PCI, this patch allows for addition of
> non-PCI based VME bridges.
>
> Signed-off-by: Manohar Vanga <manohar.vanga@...n.ch>
Acked-by: Martyn Welch <martyn.welch@...com>
> ---
> drivers/staging/vme/bridges/vme_ca91cx42.c | 24 ++++++++++++++++++
> drivers/staging/vme/bridges/vme_tsi148.c | 24 ++++++++++++++++++
> drivers/staging/vme/vme.c | 36 ++++++++++++++++-----------
> drivers/staging/vme/vme_bridge.h | 10 +++++--
> 4 files changed, 76 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.c b/drivers/staging/vme/bridges/vme_ca91cx42.c
> index 5122c13..0e4feac 100644
> --- a/drivers/staging/vme/bridges/vme_ca91cx42.c
> +++ b/drivers/staging/vme/bridges/vme_ca91cx42.c
> @@ -1500,6 +1500,28 @@ static int ca91cx42_slot_get(struct vme_bridge *ca91cx42_bridge)
>
> }
>
> +void *ca91cx42_alloc_consistent(struct device *parent, size_t size,
> + dma_addr_t *dma)
> +{
> + struct pci_dev *pdev;
> +
> + /* Find pci_dev container of dev */
> + pdev = container_of(parent, struct pci_dev, dev);
> +
> + return pci_alloc_consistent(pdev, size, dma);
> +}
> +
> +void ca91cx42_free_consistent(struct device *parent, size_t size, void *vaddr,
> + dma_addr_t dma)
> +{
> + struct pci_dev *pdev;
> +
> + /* Find pci_dev container of dev */
> + pdev = container_of(parent, struct pci_dev, dev);
> +
> + pci_free_consistent(pdev, size, vaddr, dma);
> +}
> +
> static int __init ca91cx42_init(void)
> {
> return pci_register_driver(&ca91cx42_driver);
> @@ -1769,6 +1791,8 @@ static int ca91cx42_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> ca91cx42_bridge->lm_attach = ca91cx42_lm_attach;
> ca91cx42_bridge->lm_detach = ca91cx42_lm_detach;
> ca91cx42_bridge->slot_get = ca91cx42_slot_get;
> + ca91cx42_bridge->alloc_consistent = ca91cx42_alloc_consistent;
> + ca91cx42_bridge->free_consistent = ca91cx42_free_consistent;
>
> data = ioread32(ca91cx42_device->base + MISC_CTL);
> dev_info(&pdev->dev, "Board is%s the VME system controller\n",
> diff --git a/drivers/staging/vme/bridges/vme_tsi148.c b/drivers/staging/vme/bridges/vme_tsi148.c
> index 9c53951..6c1167c 100644
> --- a/drivers/staging/vme/bridges/vme_tsi148.c
> +++ b/drivers/staging/vme/bridges/vme_tsi148.c
> @@ -2114,6 +2114,28 @@ static int tsi148_slot_get(struct vme_bridge *tsi148_bridge)
> return (int)slot;
> }
>
> +void *tsi148_alloc_consistent(struct device *parent, size_t size,
> + dma_addr_t *dma)
> +{
> + struct pci_dev *pdev;
> +
> + /* Find pci_dev container of dev */
> + pdev = container_of(parent, struct pci_dev, dev);
> +
> + return pci_alloc_consistent(pdev, size, dma);
> +}
> +
> +void tsi148_free_consistent(struct device *parent, size_t size, void *vaddr,
> + dma_addr_t dma)
> +{
> + struct pci_dev *pdev;
> +
> + /* Find pci_dev container of dev */
> + pdev = container_of(parent, struct pci_dev, dev);
> +
> + pci_free_consistent(pdev, size, vaddr, dma);
> +}
> +
> static int __init tsi148_init(void)
> {
> return pci_register_driver(&tsi148_driver);
> @@ -2443,6 +2465,8 @@ static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> tsi148_bridge->lm_attach = tsi148_lm_attach;
> tsi148_bridge->lm_detach = tsi148_lm_detach;
> tsi148_bridge->slot_get = tsi148_slot_get;
> + tsi148_bridge->alloc_consistent = tsi148_alloc_consistent;
> + tsi148_bridge->free_consistent = tsi148_free_consistent;
>
> data = ioread32be(tsi148_device->base + TSI148_LCSR_VSTAT);
> dev_info(&pdev->dev, "Board is%s the VME system controller\n",
> diff --git a/drivers/staging/vme/vme.c b/drivers/staging/vme/vme.c
> index c078ce3..d243a4a 100644
> --- a/drivers/staging/vme/vme.c
> +++ b/drivers/staging/vme/vme.c
> @@ -83,15 +83,11 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
> /*
> * Allocate a contiguous block of memory for use by the driver. This is used to
> * create the buffers for the slave windows.
> - *
> - * XXX VME bridges could be available on buses other than PCI. At the momment
> - * this framework only supports PCI devices.
> */
> void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
> dma_addr_t *dma)
> {
> struct vme_bridge *bridge;
> - struct pci_dev *pdev;
>
> if (resource == NULL) {
> printk(KERN_ERR "No resource\n");
> @@ -104,28 +100,29 @@ void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
> return NULL;
> }
>
> - /* Find pci_dev container of dev */
> if (bridge->parent == NULL) {
> - printk(KERN_ERR "Dev entry NULL\n");
> + printk(KERN_ERR "Dev entry NULL for bridge %s\n",
> + bridge->name);
> + return NULL;
> + }
> +
> + if (bridge->alloc_consistent == NULL) {
> + pr_err("alloc_consistent not supported by bridge %s\n",
> + bridge->name);
> return NULL;
> }
> - pdev = container_of(bridge->parent, struct pci_dev, dev);
>
> - return pci_alloc_consistent(pdev, size, dma);
> + return bridge->alloc_consistent(bridge->parent, size, dma);
> }
> EXPORT_SYMBOL(vme_alloc_consistent);
>
> /*
> * Free previously allocated contiguous block of memory.
> - *
> - * XXX VME bridges could be available on buses other than PCI. At the momment
> - * this framework only supports PCI devices.
> */
> void vme_free_consistent(struct vme_resource *resource, size_t size,
> void *vaddr, dma_addr_t dma)
> {
> struct vme_bridge *bridge;
> - struct pci_dev *pdev;
>
> if (resource == NULL) {
> printk(KERN_ERR "No resource\n");
> @@ -138,10 +135,19 @@ void vme_free_consistent(struct vme_resource *resource, size_t size,
> return;
> }
>
> - /* Find pci_dev container of dev */
> - pdev = container_of(bridge->parent, struct pci_dev, dev);
> + if (bridge->parent == NULL) {
> + printk(KERN_ERR "Dev entry NULL for bridge %s\n",
> + bridge->name);
> + return;
> + }
> +
> + if (bridge->free_consistent == NULL) {
> + pr_err("free_consistent not supported by bridge %s\n",
> + bridge->name);
> + return;
> + }
>
> - pci_free_consistent(pdev, size, vaddr, dma);
> + bridge->free_consistent(bridge->parent, size, vaddr, dma);
> }
> EXPORT_SYMBOL(vme_free_consistent);
>
> diff --git a/drivers/staging/vme/vme_bridge.h b/drivers/staging/vme/vme_bridge.h
> index 4c6ec31..a9084f0 100644
> --- a/drivers/staging/vme/vme_bridge.h
> +++ b/drivers/staging/vme/vme_bridge.h
> @@ -98,8 +98,6 @@ struct vme_irq {
> /* This structure stores all the information about one bridge
> * The structure should be dynamically allocated by the driver and one instance
> * of the structure should be present for each VME chip present in the system.
> - *
> - * Currently we assume that all chips are PCI-based
> */
> struct vme_bridge {
> char name[VMENAMSIZ];
> @@ -112,7 +110,7 @@ struct vme_bridge {
> struct list_head vme_errors; /* List for errors generated on VME */
>
> /* Bridge Info - XXX Move to private structure? */
> - struct device *parent; /* Generic device struct (pdev->dev for PCI) */
> + struct device *parent; /* Parent device (eg. pdev->dev for PCI) */
> void *driver_priv; /* Private pointer for the bridge driver */
>
> struct device dev[VME_SLOTS_MAX]; /* Device registered with
> @@ -165,6 +163,12 @@ struct vme_bridge {
>
> /* CR/CSR space functions */
> int (*slot_get) (struct vme_bridge *);
> +
> + /* Bridge parent interface */
> + void *(*alloc_consistent)(struct device *dev, size_t size,
> + dma_addr_t *dma);
> + void (*free_consistent)(struct device *dev, size_t size,
> + void *vaddr, dma_addr_t dma);
> };
>
> void vme_irq_handler(struct vme_bridge *, int, int);
--
Martyn Welch (Principal Software Engineer) | Registered in England and
GE Intelligent Platforms | Wales (3828642) at 100
T +44(0)127322748 | Barbirolli Square, Manchester,
E martyn.welch@...com | M2 3AB VAT:GB 927559189
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