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Message-ID: <78C9135A3D2ECE4B8162EBDCE82CAD7701CBF887@nekter>
Date: Fri, 29 Jun 2007 02:20:21 -0400
From: "Sivakumar Subramani" <Sivakumar.Subramani@...erion.com>
To: <netdev@...r.kernel.org>, <jeff@...zik.org>
Cc: "Leonid Grossman" <Leonid.Grossman@...erion.com>,
"Ramkrishna Vepa" <Ramkrishna.Vepa@...erion.com>,
"Rastapur Santosh" <santosh.rastapur@...erion.com>,
"Sreenivasa Honnur" <Sreenivasa.Honnur@...erion.com>,
"Alicia Pena" <Alicia.Pena@...erion.com>,
"Sriram Rapuru" <Sriram.Rapuru@...erion.com>,
"Veena Parat" <Veena.Parat@...erion.com>
Subject: RE: [PATCH 2.6.22 1/4]S2IO: Adding checks to check the return value of pci mapping function
Hi Jeff,
Any update on these patch submission? Is it in queue?
Thanks,
~Siva
-----Original Message-----
From: Veena Parat [mailto:Veena.Parat@...erion.com]
Sent: Tuesday, June 19, 2007 3:27 PM
To: netdev@...r.kernel.org; jeff@...zik.org
Cc: Leonid Grossman; Ramkrishna Vepa; Rastapur Santosh; Sivakumar
Subramani; Sreenivasa Honnur; Alicia Pena; Sriram Rapuru
Subject: [PATCH 2.6.22 1/4]S2IO: Adding checks to check the return value
of pci mapping function
Adding checks to check the return value of pci mapping function
Signed-off-by: Veena Parat <veena.parat@...erion.com>
---
diff -urpN org/drivers/net/s2io.c patch_1/drivers/net/s2io.c
--- org/drivers/net/s2io.c 2007-05-17 20:35:39.000000000 +0530
+++ patch_1/drivers/net/s2io.c 2007-05-17 20:35:55.000000000 +0530
@@ -282,6 +282,7 @@ static char ethtool_driver_stats_keys[][
("lro_flush_due_to_max_pkts"),
("lro_avg_aggr_pkts"),
("mem_alloc_fail_cnt"),
+ {"pci_map_fail_cnt"},
("watchdog_timer_cnt"),
("mem_allocated"),
("mem_freed"),
@@ -2247,10 +2248,19 @@ static int fill_rxd_3buf(struct s2io_nic
(nic->pdev, skb->data, l3l4hdr_size + 4,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer1_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer1_ptr == DMA_ERROR_CODE)) {
+ nic->mac_control.stats_info->sw_stat.pci_map_fail_cnt++;
+ return -ENOMEM;
+ }
+
/* skb_shinfo(skb)->frag_list will have L4 data payload */
skb_shinfo(skb)->frag_list = dev_alloc_skb(dev->mtu +
ALIGN_SIZE);
if (skb_shinfo(skb)->frag_list == NULL) {
nic->mac_control.stats_info->sw_stat.mem_alloc_fail_cnt++;
+ pci_unmap_single
+ (nic->pdev, (dma_addr_t)skb->data, l3l4hdr_size
+ 4,
+ PCI_DMA_FROMDEVICE);
DBG_PRINT(INFO_DBG, "%s: dev_alloc_skb failed\n ",
dev->name);
return -ENOMEM ;
}
@@ -2267,6 +2277,11 @@ static int fill_rxd_3buf(struct s2io_nic
((struct RxD3*)rxdp)->Buffer2_ptr = pci_map_single(nic->pdev,
frag_list->data, dev->mtu,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer2_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer2_ptr == DMA_ERROR_CODE)) {
+ nic->mac_control.stats_info->sw_stat.pci_map_fail_cnt++;
+ return -ENOMEM;
+ }
rxdp->Control_2 |= SET_BUFFER1_SIZE_3(l3l4hdr_size + 4);
rxdp->Control_2 |= SET_BUFFER2_SIZE_3(dev->mtu);
@@ -2399,6 +2414,16 @@ static int fill_rx_buffers(struct s2io_n
((struct RxD1*)rxdp)->Buffer0_ptr =
pci_map_single
(nic->pdev, skb->data, size - NET_IP_ALIGN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD1*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD1*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ nic->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
nic->mac_control.stats_info->sw_stat.mem_freed
+ += skb->truesize;
+ dev_kfree_skb_irq(skb);
+ return -ENOMEM;
+ }
rxdp->Control_2 =
SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
@@ -2430,14 +2455,19 @@ static int fill_rx_buffers(struct s2io_n
skb->data = (void *) (unsigned long)tmp;
skb_reset_tail_pointer(skb);
- if (!(((struct RxD3*)rxdp)->Buffer0_ptr))
- ((struct RxD3*)rxdp)->Buffer0_ptr =
- pci_map_single(nic->pdev, ba->ba_0,
BUF0_LEN,
- PCI_DMA_FROMDEVICE);
- else
-
pci_dma_sync_single_for_device(nic->pdev,
- (dma_addr_t) ((struct
RxD3*)rxdp)->Buffer0_ptr,
- BUF0_LEN, PCI_DMA_FROMDEVICE);
+ ((struct RxD3*)rxdp)->Buffer0_ptr =
+ pci_map_single(nic->pdev, ba->ba_0,
BUF0_LEN,
+ PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ nic->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
nic->mac_control.stats_info->sw_stat.mem_freed
+ += skb->truesize;
+ dev_kfree_skb_irq(skb);
+ return -ENOMEM;
+ }
rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
if (nic->rxd_mode == RXD_MODE_3B) {
/* Two buffer mode */
@@ -2447,15 +2477,37 @@ static int fill_rx_buffers(struct s2io_n
* L4 payload
*/
((struct RxD3*)rxdp)->Buffer2_ptr =
pci_map_single
- (nic->pdev, skb->data, dev->mtu + 4,
- PCI_DMA_FROMDEVICE);
+ (nic->pdev, skb->data, dev->mtu
+ 4,
+ PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer2_ptr
== 0) ||
+ (((struct
RxD3*)rxdp)->Buffer2_ptr ==
+ DMA_ERROR_CODE)) {
+
nic->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
nic->mac_control.stats_info->sw_stat.
+ mem_freed +=
skb->truesize;
+ dev_kfree_skb_irq(skb);
+ return -ENOMEM;
+ }
- /* Buffer-1 will be dummy buffer. Not
used */
- if (!(((struct
RxD3*)rxdp)->Buffer1_ptr)) {
- ((struct
RxD3*)rxdp)->Buffer1_ptr =
+ ((struct RxD3*)rxdp)->Buffer1_ptr =
pci_map_single(nic->pdev,
ba->ba_1, BUF1_LEN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer1_ptr
== 0) ||
+ (((struct
RxD3*)rxdp)->Buffer1_ptr ==
+ DMA_ERROR_CODE)) {
+
nic->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
nic->mac_control.stats_info->sw_stat.
+ mem_freed +=
skb->truesize;
+ pci_unmap_single
+ (nic->pdev,
+ (dma_addr_t)skb->data,
+ dev->mtu + 4,
+ PCI_DMA_FROMDEVICE);
+ dev_kfree_skb_irq(skb);
+ return -ENOMEM;
}
rxdp->Control_2 |=
SET_BUFFER1_SIZE_3(1);
rxdp->Control_2 |= SET_BUFFER2_SIZE_3 @@
-2655,7 +2707,8 @@ static int s2io_poll(struct net_device *
for (i = 0; i < config->rx_ring_num; i++) {
if (fill_rx_buffers(nic, i) == -ENOMEM) {
- DBG_PRINT(INFO_DBG, "%s:Out of memory",
dev->name);
+ DBG_PRINT(INFO_DBG, "%s - %s:Out of memory",
+ __FUNCTION__, dev->name);
DBG_PRINT(INFO_DBG, " in Rx Poll!!\n");
break;
}
@@ -2672,7 +2725,8 @@ no_rx:
for (i = 0; i < config->rx_ring_num; i++) {
if (fill_rx_buffers(nic, i) == -ENOMEM) {
- DBG_PRINT(INFO_DBG, "%s:Out of memory",
dev->name);
+ DBG_PRINT(INFO_DBG, "%s - %s:Out of memory",
+ __FUNCTION__, dev->name);
DBG_PRINT(INFO_DBG, " in Rx Poll!!\n");
break;
}
@@ -2722,7 +2776,8 @@ static void s2io_netpoll(struct net_devi
for (i = 0; i < config->rx_ring_num; i++) {
if (fill_rx_buffers(nic, i) == -ENOMEM) {
- DBG_PRINT(INFO_DBG, "%s:Out of memory",
dev->name);
+ DBG_PRINT(INFO_DBG, "%s - %s:Out of memory",
+ __FUNCTION__, dev->name);
DBG_PRINT(INFO_DBG, " in Rx Netpoll!!\n");
break;
}
@@ -2803,24 +2858,27 @@ static void rx_intr_handler(struct ring_
HEADER_SNAP_SIZE,
PCI_DMA_FROMDEVICE);
} else if (nic->rxd_mode == RXD_MODE_3B) {
- pci_dma_sync_single_for_cpu(nic->pdev,
(dma_addr_t)
+ pci_unmap_single(nic->pdev, (dma_addr_t)
((struct RxD3*)rxdp)->Buffer0_ptr,
BUF0_LEN, PCI_DMA_FROMDEVICE);
pci_unmap_single(nic->pdev, (dma_addr_t)
+ ((struct RxD3*)rxdp)->Buffer1_ptr,
+ BUF1_LEN, PCI_DMA_FROMDEVICE);
+ pci_unmap_single(nic->pdev, (dma_addr_t)
((struct RxD3*)rxdp)->Buffer2_ptr,
dev->mtu + 4,
PCI_DMA_FROMDEVICE);
} else {
- pci_dma_sync_single_for_cpu(nic->pdev,
(dma_addr_t)
- ((struct
RxD3*)rxdp)->Buffer0_ptr, BUF0_LEN,
- PCI_DMA_FROMDEVICE);
pci_unmap_single(nic->pdev, (dma_addr_t)
- ((struct
RxD3*)rxdp)->Buffer1_ptr,
- l3l4hdr_size + 4,
- PCI_DMA_FROMDEVICE);
+ ((struct RxD3*)rxdp)->Buffer0_ptr,
BUF0_LEN,
+ PCI_DMA_FROMDEVICE);
pci_unmap_single(nic->pdev, (dma_addr_t)
- ((struct
RxD3*)rxdp)->Buffer2_ptr,
- dev->mtu, PCI_DMA_FROMDEVICE);
+ ((struct RxD3*)rxdp)->Buffer1_ptr,
+ l3l4hdr_size + 4,
+ PCI_DMA_FROMDEVICE);
+ pci_unmap_single(nic->pdev, (dma_addr_t)
+ ((struct RxD3*)rxdp)->Buffer2_ptr,
+ dev->mtu, PCI_DMA_FROMDEVICE);
}
prefetch(skb->data);
rx_osm_handler(ring_data, rxdp);
@@ -4082,11 +4140,33 @@ static int s2io_xmit(struct sk_buff *skb
txdp->Buffer_Pointer = pci_map_single(sp->pdev,
sp->ufo_in_band_v,
sizeof(u64), PCI_DMA_TODEVICE);
+ if ((txdp->Buffer_Pointer == 0) ||
+ (txdp->Buffer_Pointer == DMA_ERROR_CODE)) {
+
sp->mac_control.stats_info->sw_stat.pci_map_fail_cnt++;
+ netif_stop_queue(dev);
+ sp->mac_control.stats_info->sw_stat.mem_freed +=
+ skb->truesize;
+ dev_kfree_skb(skb);
+ spin_unlock_irqrestore(&sp->tx_lock, flags);
+ return 0;
+ }
txdp++;
}
txdp->Buffer_Pointer = pci_map_single
(sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE);
+
+ if ((txdp->Buffer_Pointer == 0) ||
+ (txdp->Buffer_Pointer == DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.pci_map_fail_cnt++;
+ netif_stop_queue(dev);
+ sp->mac_control.stats_info->sw_stat.mem_freed +=
+ skb->truesize;
+ dev_kfree_skb(skb);
+ spin_unlock_irqrestore(&sp->tx_lock, flags);
+ return 0;
+ }
+
txdp->Host_Control = (unsigned long) skb;
txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len);
if (offload_type == SKB_GSO_UDP)
@@ -4175,11 +4255,13 @@ static int s2io_chk_rx_buffers(struct s2
clear_bit(0, (&sp->tasklet_status));
} else if (level == LOW)
tasklet_schedule(&sp->task);
-
- } else if (fill_rx_buffers(sp, rng_n) == -ENOMEM) {
- DBG_PRINT(INFO_DBG, "%s:Out of memory",
sp->dev->name);
+ } else {
+ if (fill_rx_buffers(sp, rng_n) == -ENOMEM) {
+ DBG_PRINT(INFO_DBG, "%s - %s:Out of memory",
+ __FUNCTION__, sp->dev->name);
DBG_PRINT(INFO_DBG, " in Rx Intr!!\n");
}
+ }
return 0;
}
@@ -5916,6 +5998,7 @@ static void s2io_get_ethtool_stats(struc
else
tmp_stats[i++] = 0;
tmp_stats[i++] = stat_info->sw_stat.mem_alloc_fail_cnt;
+ tmp_stats[i++] = stat_info->sw_stat.pci_map_fail_cnt;
tmp_stats[i++] = stat_info->sw_stat.watchdog_timer_cnt;
tmp_stats[i++] = stat_info->sw_stat.mem_allocated;
tmp_stats[i++] = stat_info->sw_stat.mem_freed; @@ -6158,8
+6241,8 @@ static void s2io_tasklet(unsigned long d
for (i = 0; i < config->rx_ring_num; i++) {
ret = fill_rx_buffers(sp, i);
if (ret == -ENOMEM) {
- DBG_PRINT(INFO_DBG, "%s: Out of ",
- dev->name);
+ DBG_PRINT(INFO_DBG, "%s- %s: Out of ",
+ __FUNCTION__, dev->name);
DBG_PRINT(INFO_DBG, "memory in
tasklet\n");
break;
} else if (ret == -EFILL) {
@@ -6291,6 +6374,16 @@ static int set_rxd_buffer_pointer(struct
pci_map_single( sp->pdev, (*skb)->data,
size - NET_IP_ALIGN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD1*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD1*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
rxdp->Host_Control = (unsigned long) (*skb);
}
} else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control
== 0)) { @@ -6315,15 +6408,51 @@ static int
set_rxd_buffer_pointer(struct
pci_map_single(sp->pdev, (*skb)->data,
dev->mtu + 4,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer2_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer2_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
((struct RxD3*)rxdp)->Buffer0_ptr = *temp0 =
pci_map_single( sp->pdev, ba->ba_0,
BUF0_LEN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ pci_unmap_single (sp->pdev,
+ (dma_addr_t)(*skb)->data,
+ dev->mtu + 4,
PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
rxdp->Host_Control = (unsigned long) (*skb);
/* Buffer-1 will be dummy buffer not used */
((struct RxD3*)rxdp)->Buffer1_ptr = *temp1 =
pci_map_single(sp->pdev, ba->ba_1,
BUF1_LEN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ pci_unmap_single (sp->pdev,
+ (dma_addr_t)(*skb)->data,
+ dev->mtu + 4,
PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
}
} else if ((rxdp->Host_Control == 0)) {
/* Three buffer mode */
@@ -6346,11 +6475,31 @@ static int set_rxd_buffer_pointer(struct
((struct RxD3*)rxdp)->Buffer0_ptr = *temp0 =
pci_map_single(sp->pdev, ba->ba_0,
BUF0_LEN,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer0_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer0_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
/* Buffer-1 receives L3/L4 headers */
((struct RxD3*)rxdp)->Buffer1_ptr = *temp1 =
pci_map_single( sp->pdev, (*skb)->data,
l3l4hdr_size + 4,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer1_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer1_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
/*
* skb_shinfo(skb)->frag_list will have L4
* data payload
@@ -6362,10 +6511,17 @@ static int set_rxd_buffer_pointer(struct
failed\n ", dev->name);
sp->mac_control.stats_info->sw_stat. \
mem_alloc_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed
+ += (*skb)->truesize;
+ pci_unmap_single (sp->pdev,
+ (dma_addr_t)(*skb)->data,
+ l3l4hdr_size + 4,
PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(*skb);
return -ENOMEM ;
}
frag_list = skb_shinfo(*skb)->frag_list;
frag_list->next = NULL;
+ (*skb)->truesize += frag_list->truesize;
sp->mac_control.stats_info->sw_stat.mem_allocated
+= frag_list->truesize;
/*
@@ -6374,6 +6530,19 @@ static int set_rxd_buffer_pointer(struct
((struct RxD3*)rxdp)->Buffer2_ptr = *temp2 =
pci_map_single( sp->pdev,
frag_list->data,
dev->mtu,
PCI_DMA_FROMDEVICE);
+ if ((((struct RxD3*)rxdp)->Buffer2_ptr == 0) ||
+ (((struct RxD3*)rxdp)->Buffer2_ptr ==
+ DMA_ERROR_CODE)) {
+ sp->mac_control.stats_info->sw_stat.
+ pci_map_fail_cnt++;
+
sp->mac_control.stats_info->sw_stat.mem_freed +=
+ (*skb)->truesize;
+ pci_unmap_single (sp->pdev,
+ (dma_addr_t)(*skb)->data,
+ l3l4hdr_size + 4,
PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(*skb);
+ return -ENOMEM;
+ }
}
}
return 0;
@@ -6668,8 +6837,8 @@ static int s2io_card_up(struct s2io_nic
for (i = 0; i < config->rx_ring_num; i++) {
if ((ret = fill_rx_buffers(sp, i))) {
- DBG_PRINT(ERR_DBG, "%s: Out of memory in
Open\n",
- dev->name);
+ DBG_PRINT(ERR_DBG, "%s - %s: Out of memory in
Open\n",
+ __FUNCTION__, dev->name);
s2io_reset(sp);
free_rx_buffers(sp);
return -ENOMEM;
diff -urpN org/drivers/net/s2io.h patch_1/drivers/net/s2io.h
--- org/drivers/net/s2io.h 2007-05-17 19:26:16.000000000 +0530
+++ patch_1/drivers/net/s2io.h 2007-05-17 20:34:50.000000000 +0530
@@ -74,6 +74,10 @@ static int debug_level = ERR_DBG;
/* DEBUG message print. */
#define DBG_PRINT(dbg_level, args...) if(!(debug_level<dbg_level))
printk(args)
+#ifndef DMA_ERROR_CODE
+#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
+#endif
+
/* Protocol assist features of the NIC */ #define L3_CKSUM_OK 0xFFFF
#define L4_CKSUM_OK 0xFFFF @@ -97,6 +101,7 @@ struct swStat {
unsigned long long num_aggregations;
/* Other statistics */
unsigned long long mem_alloc_fail_cnt;
+ unsigned long long pci_map_fail_cnt;
unsigned long long watchdog_timer_cnt;
unsigned long long mem_allocated;
unsigned long long mem_freed;
@@ -851,6 +856,7 @@ struct s2io_nic {
int task_flag;
unsigned long long start_time;
+ unsigned long long max_mem;
#define CARD_DOWN 1
#define CARD_UP 2
atomic_t card_state;
-
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