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e1000e: Fix jumbo frame receive code. 

Fix allocation and freeing of jumbo frames where several bugs
were recently introduced by cleanups after we forked this code
from e1000. This moves ps_pages to buffer_info where it really
belongs and makes it a dynamically allocated array. The penalty
is not that high since it's allocated outside of the buffer_info
struct anyway.

Without this patch all jumbo frames are completely broken and the
driver panics.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Auke Kok 2007-10-25 13:57:44 -07:00 committed by Jeff Garzik
parent e38c2c651a
commit 47f44e40a3
2 changed files with 55 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/e1000e/e1000.h
View File

@ -123,6 +123,8 @@ struct e1000_buffer {
};
/* RX */
struct page *page;
/* arrays of page information for packet split */
struct e1000_ps_page *ps_pages;
};
};
@ -142,8 +144,6 @@ struct e1000_ring {
/* array of buffer information structs */
struct e1000_buffer *buffer_info;
/* arrays of page information for packet split */
struct e1000_ps_page *ps_pages;
struct sk_buff *rx_skb_top;
struct e1000_queue_stats stats;

104
drivers/net/e1000e/netdev.c
View File

@ -245,37 +245,36 @@ static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
for (j = 0; j < PS_PAGE_BUFFERS; j++) {
ps_page = &rx_ring->ps_pages[(i * PS_PAGE_BUFFERS)
+ j];
if (j < adapter->rx_ps_pages) {
if (!ps_page->page) {
ps_page->page = alloc_page(GFP_ATOMIC);
if (!ps_page->page) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
ps_page->dma = pci_map_page(pdev,
ps_page->page,
0, PAGE_SIZE,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(
ps_page->dma)) {
dev_err(&adapter->pdev->dev,
"RX DMA page map failed\n");
adapter->rx_dma_failed++;
goto no_buffers;
}
}
/*
* Refresh the desc even if buffer_addrs
* didn't change because each write-back
* erases this info.
*/
rx_desc->read.buffer_addr[j+1] =
cpu_to_le64(ps_page->dma);
} else {
ps_page = &buffer_info->ps_pages[j];
if (j >= adapter->rx_ps_pages) {
/* all unused desc entries get hw null ptr */
rx_desc->read.buffer_addr[j+1] = ~0;
continue;
}
if (!ps_page->page) {
ps_page->page = alloc_page(GFP_ATOMIC);
if (!ps_page->page) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
ps_page->dma = pci_map_page(pdev,
ps_page->page,
0, PAGE_SIZE,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(ps_page->dma)) {
dev_err(&adapter->pdev->dev,
"RX DMA page map failed\n");
adapter->rx_dma_failed++;
goto no_buffers;
}
}
/*
* Refresh the desc even if buffer_addrs
* didn't change because each write-back
* erases this info.
*/
rx_desc->read.buffer_addr[j+1] =
cpu_to_le64(ps_page->dma);
}
skb = netdev_alloc_skb(netdev,
@ -953,7 +952,7 @@ static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
((length + l1) <= adapter->rx_ps_bsize0)) {
u8 *vaddr;
ps_page = &rx_ring->ps_pages[i * PS_PAGE_BUFFERS];
ps_page = &buffer_info->ps_pages[0];
/* there is no documentation about how to call
* kmap_atomic, so we can't hold the mapping
@ -977,7 +976,7 @@ static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
if (!length)
break;
ps_page = &rx_ring->ps_pages[(i * PS_PAGE_BUFFERS) + j];
ps_page = &buffer_info->ps_pages[j];
pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
PCI_DMA_FROMDEVICE);
ps_page->dma = 0;
@ -1043,7 +1042,6 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
struct e1000_buffer *buffer_info;
struct e1000_ps_page *ps_page;
struct pci_dev *pdev = adapter->pdev;
unsigned long size;
unsigned int i, j;
/* Free all the Rx ring sk_buffs */
@ -1075,8 +1073,7 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
}
for (j = 0; j < PS_PAGE_BUFFERS; j++) {
ps_page = &rx_ring->ps_pages[(i * PS_PAGE_BUFFERS)
+ j];
ps_page = &buffer_info->ps_pages[j];
if (!ps_page->page)
break;
pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
@ -1093,12 +1090,6 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
rx_ring->rx_skb_top = NULL;
}
size = sizeof(struct e1000_buffer) * rx_ring->count;
memset(rx_ring->buffer_info, 0, size);
size = sizeof(struct e1000_ps_page)
* (rx_ring->count * PS_PAGE_BUFFERS);
memset(rx_ring->ps_pages, 0, size);
/* Zero out the descriptor ring */
memset(rx_ring->desc, 0, rx_ring->size);
@ -1421,7 +1412,8 @@ err:
int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
{
struct e1000_ring *rx_ring = adapter->rx_ring;
int size, desc_len, err = -ENOMEM;
struct e1000_buffer *buffer_info;
int i, size, desc_len, err = -ENOMEM;
size = sizeof(struct e1000_buffer) * rx_ring->count;
rx_ring->buffer_info = vmalloc(size);
@ -1429,11 +1421,14 @@ int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
goto err;
memset(rx_ring->buffer_info, 0, size);
rx_ring->ps_pages = kcalloc(rx_ring->count * PS_PAGE_BUFFERS,
sizeof(struct e1000_ps_page),
GFP_KERNEL);
if (!rx_ring->ps_pages)
goto err;
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
sizeof(struct e1000_ps_page),
GFP_KERNEL);
if (!buffer_info->ps_pages)
goto err_pages;
}
desc_len = sizeof(union e1000_rx_desc_packet_split);
@ -1443,16 +1438,21 @@ int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
err = e1000_alloc_ring_dma(adapter, rx_ring);
if (err)
goto err;
goto err_pages;
rx_ring->next_to_clean = 0;
rx_ring->next_to_use = 0;
rx_ring->rx_skb_top = NULL;
return 0;
err_pages:
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
kfree(buffer_info->ps_pages);
}
err:
vfree(rx_ring->buffer_info);
kfree(rx_ring->ps_pages);
ndev_err(adapter->netdev,
"Unable to allocate memory for the transmit descriptor ring\n");
return err;
@ -1518,15 +1518,17 @@ void e1000e_free_rx_resources(struct e1000_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
struct e1000_ring *rx_ring = adapter->rx_ring;
int i;
e1000_clean_rx_ring(adapter);
for (i = 0; i < rx_ring->count; i++) {
kfree(rx_ring->buffer_info[i].ps_pages);
}
vfree(rx_ring->buffer_info);
rx_ring->buffer_info = NULL;
kfree(rx_ring->ps_pages);
rx_ring->ps_pages = NULL;
dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
rx_ring->dma);
rx_ring->desc = NULL;