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authorBen Hutchings <bhutchings@solarflare.com>2010-06-01 15:32:43 +0400
committerDavid S. Miller <davem@davemloft.net>2010-06-02 13:21:11 +0400
commitdd8f61d7ff92eb8a4626565ca37b209b3a8a9ce2 (patch)
tree14107a8c87152e86eee7e2ac9c3f696f12bb835c
parentd188ceeb3dcc6766db34021b36371a14c21ebd74 (diff)
downloadlinux-dd8f61d7ff92eb8a4626565ca37b209b3a8a9ce2.tar.xz
sfc: Get port number from CS_PORT_NUM, not PCI function number
A single shared memory region used to communicate with firmware is mapped into both PCI PFs of the SFC9020 and SFL9021. Drivers must be able to identify which port they are addressing in order to use the correct sub-region. Currently we use the PCI function number, but the PCI address may be virtualised. Use the CS_PORT_NUM register field defined for just this purpose. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/sfc/net_driver.h4
-rw-r--r--drivers/net/sfc/siena.c4
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 40c0d931b182..6b2e4402ec57 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -649,6 +649,7 @@ union efx_multicast_hash {
* struct efx_nic - an Efx NIC
* @name: Device name (net device name or bus id before net device registered)
* @pci_dev: The PCI device
+ * @port_num: Index of this host port within the controller
* @type: Controller type attributes
* @legacy_irq: IRQ number
* @workqueue: Workqueue for port reconfigures and the HW monitor.
@@ -732,6 +733,7 @@ union efx_multicast_hash {
struct efx_nic {
char name[IFNAMSIZ];
struct pci_dev *pci_dev;
+ unsigned port_num;
const struct efx_nic_type *type;
int legacy_irq;
struct workqueue_struct *workqueue;
@@ -834,7 +836,7 @@ static inline const char *efx_dev_name(struct efx_nic *efx)
static inline unsigned int efx_port_num(struct efx_nic *efx)
{
- return PCI_FUNC(efx->pci_dev->devfn);
+ return efx->port_num;
}
/**
diff --git a/drivers/net/sfc/siena.c b/drivers/net/sfc/siena.c
index 727b4228e081..7ecd255a7cc0 100644
--- a/drivers/net/sfc/siena.c
+++ b/drivers/net/sfc/siena.c
@@ -206,6 +206,7 @@ static int siena_probe_nic(struct efx_nic *efx)
{
struct siena_nic_data *nic_data;
bool already_attached = 0;
+ efx_oword_t reg;
int rc;
/* Allocate storage for hardware specific data */
@@ -220,6 +221,9 @@ static int siena_probe_nic(struct efx_nic *efx)
goto fail1;
}
+ efx_reado(efx, &reg, FR_AZ_CS_DEBUG);
+ efx->port_num = EFX_OWORD_FIELD(reg, FRF_CZ_CS_PORT_NUM) - 1;
+
efx_mcdi_init(efx);
/* Recover from a failed assertion before probing */