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Date: Mon, 26 Aug 2013 00:00:53 +0100
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>
Subject: [PATCH net-next 02/16] sfc: Add GFP flags to efx_nic_alloc_buffer()
and make most callers allow blocking
Most call sites for efx_nic_alloc_buffer() are part of the probe or
reconfiguration paths and can allocate with GFP_KERNEL. A few others
should use GFP_NOIO (I think). Only one is in atomic context and
must use the current GFP_ATOMIC.
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/ethernet/sfc/falcon.c | 5 +++--
drivers/net/ethernet/sfc/mcdi_mon.c | 2 +-
drivers/net/ethernet/sfc/mcdi_port.c | 2 +-
drivers/net/ethernet/sfc/nic.c | 4 ++--
drivers/net/ethernet/sfc/nic.h | 2 +-
drivers/net/ethernet/sfc/ptp.c | 2 +-
drivers/net/ethernet/sfc/siena.c | 3 ++-
drivers/net/ethernet/sfc/siena_sriov.c | 10 ++++++----
drivers/net/ethernet/sfc/tx.c | 3 ++-
9 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c
index 522850036..395d89d 100644
--- a/drivers/net/ethernet/sfc/falcon.c
+++ b/drivers/net/ethernet/sfc/falcon.c
@@ -1418,7 +1418,7 @@ static int falcon_probe_port(struct efx_nic *efx)
/* Allocate buffer for stats */
rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
- FALCON_MAC_STATS_SIZE);
+ FALCON_MAC_STATS_SIZE, GFP_KERNEL);
if (rc)
return rc;
netif_dbg(efx, probe, efx->net_dev,
@@ -2035,7 +2035,8 @@ static int falcon_probe_nic(struct efx_nic *efx)
}
/* Allocate memory for INT_KER */
- rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
+ rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t),
+ GFP_KERNEL);
if (rc)
goto fail4;
BUG_ON(efx->irq_status.dma_addr & 0x0f);
diff --git a/drivers/net/ethernet/sfc/mcdi_mon.c b/drivers/net/ethernet/sfc/mcdi_mon.c
index 3179b2b..958c73f 100644
--- a/drivers/net/ethernet/sfc/mcdi_mon.c
+++ b/drivers/net/ethernet/sfc/mcdi_mon.c
@@ -261,7 +261,7 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
return -EIO;
rc = efx_nic_alloc_buffer(efx, &hwmon->dma_buf,
- 4 * MC_CMD_SENSOR_ENTRY_MAXNUM);
+ 4 * MC_CMD_SENSOR_ENTRY_MAXNUM, GFP_KERNEL);
if (rc)
return rc;
diff --git a/drivers/net/ethernet/sfc/mcdi_port.c b/drivers/net/ethernet/sfc/mcdi_port.c
index 8f31e3d..91df43f 100644
--- a/drivers/net/ethernet/sfc/mcdi_port.c
+++ b/drivers/net/ethernet/sfc/mcdi_port.c
@@ -989,7 +989,7 @@ int efx_mcdi_port_probe(struct efx_nic *efx)
/* Allocate buffer for stats */
rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
- MC_CMD_MAC_NSTATS * sizeof(u64));
+ MC_CMD_MAC_NSTATS * sizeof(u64), GFP_KERNEL);
if (rc)
return rc;
netif_dbg(efx, probe, efx->net_dev,
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c
index 56ed3bc..efe2773 100644
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -303,11 +303,11 @@ efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
**************************************************************************/
int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
- unsigned int len)
+ unsigned int len, gfp_t gfp_flags)
{
buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len,
&buffer->dma_addr,
- GFP_ATOMIC | __GFP_ZERO);
+ gfp_flags | __GFP_ZERO);
if (!buffer->addr)
return -ENOMEM;
buffer->len = len;
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index c699203..9120e8b 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -332,7 +332,7 @@ extern void efx_nic_init_common(struct efx_nic *efx);
extern void efx_nic_push_rx_indir_table(struct efx_nic *efx);
int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
- unsigned int len);
+ unsigned int len, gfp_t gfp_flags);
void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer);
/* Tests */
diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
index d96bfc4..56a8b88 100644
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -875,7 +875,7 @@ static int efx_ptp_probe_channel(struct efx_channel *channel)
if (!efx->ptp_data)
return -ENOMEM;
- rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int));
+ rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int), GFP_KERNEL);
if (rc != 0)
goto fail1;
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 73b511a..f0ae262 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -237,7 +237,8 @@ static int siena_probe_nic(struct efx_nic *efx)
siena_init_wol(efx);
/* Allocate memory for INT_KER */
- rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
+ rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t),
+ GFP_KERNEL);
if (rc)
goto fail4;
BUG_ON(efx->irq_status.dma_addr & 0x0f);
diff --git a/drivers/net/ethernet/sfc/siena_sriov.c b/drivers/net/ethernet/sfc/siena_sriov.c
index 2587d30..6258e7f 100644
--- a/drivers/net/ethernet/sfc/siena_sriov.c
+++ b/drivers/net/ethernet/sfc/siena_sriov.c
@@ -997,7 +997,7 @@ static void efx_sriov_reset_vf_work(struct work_struct *work)
struct efx_nic *efx = vf->efx;
struct efx_buffer buf;
- if (!efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE)) {
+ if (!efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE, GFP_NOIO)) {
efx_sriov_reset_vf(vf, &buf);
efx_nic_free_buffer(efx, &buf);
}
@@ -1241,7 +1241,8 @@ static int efx_sriov_vfs_init(struct efx_nic *efx)
pci_domain_nr(pci_dev->bus), pci_dev->bus->number,
PCI_SLOT(devfn), PCI_FUNC(devfn));
- rc = efx_nic_alloc_buffer(efx, &vf->buf, EFX_PAGE_SIZE);
+ rc = efx_nic_alloc_buffer(efx, &vf->buf, EFX_PAGE_SIZE,
+ GFP_KERNEL);
if (rc)
goto fail;
@@ -1273,7 +1274,8 @@ int efx_sriov_init(struct efx_nic *efx)
if (rc)
goto fail_cmd;
- rc = efx_nic_alloc_buffer(efx, &efx->vfdi_status, sizeof(*vfdi_status));
+ rc = efx_nic_alloc_buffer(efx, &efx->vfdi_status, sizeof(*vfdi_status),
+ GFP_KERNEL);
if (rc)
goto fail_status;
vfdi_status = efx->vfdi_status.addr;
@@ -1528,7 +1530,7 @@ void efx_sriov_reset(struct efx_nic *efx)
efx_sriov_usrev(efx, true);
(void)efx_sriov_cmd(efx, true, NULL, NULL);
- if (efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE))
+ if (efx_nic_alloc_buffer(efx, &buf, EFX_PAGE_SIZE, GFP_NOIO))
return;
for (vf_i = 0; vf_i < efx->vf_init_count; ++vf_i) {
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index 5e090e5..c0d4040 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -708,7 +708,8 @@ static u8 *efx_tsoh_get_buffer(struct efx_tx_queue *tx_queue,
TSOH_STD_SIZE * (index % TSOH_PER_PAGE) + TSOH_OFFSET;
if (unlikely(!page_buf->addr) &&
- efx_nic_alloc_buffer(tx_queue->efx, page_buf, PAGE_SIZE))
+ efx_nic_alloc_buffer(tx_queue->efx, page_buf, PAGE_SIZE,
+ GFP_ATOMIC))
return NULL;
result = (u8 *)page_buf->addr + offset;
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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