mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2552 lines
68 KiB
2552 lines
68 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Network device driver for Cell Processor-Based Blade and Celleb platform |
|
* |
|
* (C) Copyright IBM Corp. 2005 |
|
* (C) Copyright 2006 TOSHIBA CORPORATION |
|
* |
|
* Authors : Utz Bacher <[email protected]> |
|
* Jens Osterkamp <[email protected]> |
|
*/ |
|
|
|
#include <linux/compiler.h> |
|
#include <linux/crc32.h> |
|
#include <linux/delay.h> |
|
#include <linux/etherdevice.h> |
|
#include <linux/ethtool.h> |
|
#include <linux/firmware.h> |
|
#include <linux/if_vlan.h> |
|
#include <linux/in.h> |
|
#include <linux/init.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/gfp.h> |
|
#include <linux/ioport.h> |
|
#include <linux/ip.h> |
|
#include <linux/kernel.h> |
|
#include <linux/mii.h> |
|
#include <linux/module.h> |
|
#include <linux/netdevice.h> |
|
#include <linux/device.h> |
|
#include <linux/pci.h> |
|
#include <linux/skbuff.h> |
|
#include <linux/tcp.h> |
|
#include <linux/types.h> |
|
#include <linux/vmalloc.h> |
|
#include <linux/wait.h> |
|
#include <linux/workqueue.h> |
|
#include <linux/bitops.h> |
|
#include <net/checksum.h> |
|
|
|
#include "spider_net.h" |
|
|
|
MODULE_AUTHOR("Utz Bacher <[email protected]> and Jens Osterkamp " \ |
|
"<[email protected]>"); |
|
MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_VERSION(VERSION); |
|
MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); |
|
|
|
static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; |
|
static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; |
|
|
|
module_param(rx_descriptors, int, 0444); |
|
module_param(tx_descriptors, int, 0444); |
|
|
|
MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ |
|
"in rx chains"); |
|
MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ |
|
"in tx chain"); |
|
|
|
char spider_net_driver_name[] = "spidernet"; |
|
|
|
static const struct pci_device_id spider_net_pci_tbl[] = { |
|
{ PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, |
|
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
|
{ 0, } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); |
|
|
|
/** |
|
* spider_net_read_reg - reads an SMMIO register of a card |
|
* @card: device structure |
|
* @reg: register to read from |
|
* |
|
* returns the content of the specified SMMIO register. |
|
*/ |
|
static inline u32 |
|
spider_net_read_reg(struct spider_net_card *card, u32 reg) |
|
{ |
|
/* We use the powerpc specific variants instead of readl_be() because |
|
* we know spidernet is not a real PCI device and we can thus avoid the |
|
* performance hit caused by the PCI workarounds. |
|
*/ |
|
return in_be32(card->regs + reg); |
|
} |
|
|
|
/** |
|
* spider_net_write_reg - writes to an SMMIO register of a card |
|
* @card: device structure |
|
* @reg: register to write to |
|
* @value: value to write into the specified SMMIO register |
|
*/ |
|
static inline void |
|
spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) |
|
{ |
|
/* We use the powerpc specific variants instead of writel_be() because |
|
* we know spidernet is not a real PCI device and we can thus avoid the |
|
* performance hit caused by the PCI workarounds. |
|
*/ |
|
out_be32(card->regs + reg, value); |
|
} |
|
|
|
/** |
|
* spider_net_write_phy - write to phy register |
|
* @netdev: adapter to be written to |
|
* @mii_id: id of MII |
|
* @reg: PHY register |
|
* @val: value to be written to phy register |
|
* |
|
* spider_net_write_phy_register writes to an arbitrary PHY |
|
* register via the spider GPCWOPCMD register. We assume the queue does |
|
* not run full (not more than 15 commands outstanding). |
|
**/ |
|
static void |
|
spider_net_write_phy(struct net_device *netdev, int mii_id, |
|
int reg, int val) |
|
{ |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
u32 writevalue; |
|
|
|
writevalue = ((u32)mii_id << 21) | |
|
((u32)reg << 16) | ((u32)val); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); |
|
} |
|
|
|
/** |
|
* spider_net_read_phy - read from phy register |
|
* @netdev: network device to be read from |
|
* @mii_id: id of MII |
|
* @reg: PHY register |
|
* |
|
* Returns value read from PHY register |
|
* |
|
* spider_net_write_phy reads from an arbitrary PHY |
|
* register via the spider GPCROPCMD register |
|
**/ |
|
static int |
|
spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) |
|
{ |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
u32 readvalue; |
|
|
|
readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); |
|
spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); |
|
|
|
/* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT |
|
* interrupt, as we poll for the completion of the read operation |
|
* in spider_net_read_phy. Should take about 50 us |
|
*/ |
|
do { |
|
readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); |
|
} while (readvalue & SPIDER_NET_GPREXEC); |
|
|
|
readvalue &= SPIDER_NET_GPRDAT_MASK; |
|
|
|
return readvalue; |
|
} |
|
|
|
/** |
|
* spider_net_setup_aneg - initial auto-negotiation setup |
|
* @card: device structure |
|
**/ |
|
static void |
|
spider_net_setup_aneg(struct spider_net_card *card) |
|
{ |
|
struct mii_phy *phy = &card->phy; |
|
u32 advertise = 0; |
|
u16 bmsr, estat; |
|
|
|
bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
|
estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); |
|
|
|
if (bmsr & BMSR_10HALF) |
|
advertise |= ADVERTISED_10baseT_Half; |
|
if (bmsr & BMSR_10FULL) |
|
advertise |= ADVERTISED_10baseT_Full; |
|
if (bmsr & BMSR_100HALF) |
|
advertise |= ADVERTISED_100baseT_Half; |
|
if (bmsr & BMSR_100FULL) |
|
advertise |= ADVERTISED_100baseT_Full; |
|
|
|
if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) |
|
advertise |= SUPPORTED_1000baseT_Full; |
|
if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) |
|
advertise |= SUPPORTED_1000baseT_Half; |
|
|
|
sungem_phy_probe(phy, phy->mii_id); |
|
phy->def->ops->setup_aneg(phy, advertise); |
|
|
|
} |
|
|
|
/** |
|
* spider_net_rx_irq_off - switch off rx irq on this spider card |
|
* @card: device structure |
|
* |
|
* switches off rx irq by masking them out in the GHIINTnMSK register |
|
*/ |
|
static void |
|
spider_net_rx_irq_off(struct spider_net_card *card) |
|
{ |
|
u32 regvalue; |
|
|
|
regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); |
|
} |
|
|
|
/** |
|
* spider_net_rx_irq_on - switch on rx irq on this spider card |
|
* @card: device structure |
|
* |
|
* switches on rx irq by enabling them in the GHIINTnMSK register |
|
*/ |
|
static void |
|
spider_net_rx_irq_on(struct spider_net_card *card) |
|
{ |
|
u32 regvalue; |
|
|
|
regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); |
|
} |
|
|
|
/** |
|
* spider_net_set_promisc - sets the unicast address or the promiscuous mode |
|
* @card: card structure |
|
* |
|
* spider_net_set_promisc sets the unicast destination address filter and |
|
* thus either allows for non-promisc mode or promisc mode |
|
*/ |
|
static void |
|
spider_net_set_promisc(struct spider_net_card *card) |
|
{ |
|
u32 macu, macl; |
|
struct net_device *netdev = card->netdev; |
|
|
|
if (netdev->flags & IFF_PROMISC) { |
|
/* clear destination entry 0 */ |
|
spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); |
|
spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); |
|
spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, |
|
SPIDER_NET_PROMISC_VALUE); |
|
} else { |
|
macu = netdev->dev_addr[0]; |
|
macu <<= 8; |
|
macu |= netdev->dev_addr[1]; |
|
memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); |
|
|
|
macu |= SPIDER_NET_UA_DESCR_VALUE; |
|
spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); |
|
spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); |
|
spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, |
|
SPIDER_NET_NONPROMISC_VALUE); |
|
} |
|
} |
|
|
|
/** |
|
* spider_net_get_descr_status -- returns the status of a descriptor |
|
* @hwdescr: descriptor to look at |
|
* |
|
* returns the status as in the dmac_cmd_status field of the descriptor |
|
*/ |
|
static inline int |
|
spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) |
|
{ |
|
return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; |
|
} |
|
|
|
/** |
|
* spider_net_free_chain - free descriptor chain |
|
* @card: card structure |
|
* @chain: address of chain |
|
* |
|
*/ |
|
static void |
|
spider_net_free_chain(struct spider_net_card *card, |
|
struct spider_net_descr_chain *chain) |
|
{ |
|
struct spider_net_descr *descr; |
|
|
|
descr = chain->ring; |
|
do { |
|
descr->bus_addr = 0; |
|
descr->hwdescr->next_descr_addr = 0; |
|
descr = descr->next; |
|
} while (descr != chain->ring); |
|
|
|
dma_free_coherent(&card->pdev->dev, chain->num_desc * sizeof(struct spider_net_hw_descr), |
|
chain->hwring, chain->dma_addr); |
|
} |
|
|
|
/** |
|
* spider_net_init_chain - alloc and link descriptor chain |
|
* @card: card structure |
|
* @chain: address of chain |
|
* |
|
* We manage a circular list that mirrors the hardware structure, |
|
* except that the hardware uses bus addresses. |
|
* |
|
* Returns 0 on success, <0 on failure |
|
*/ |
|
static int |
|
spider_net_init_chain(struct spider_net_card *card, |
|
struct spider_net_descr_chain *chain) |
|
{ |
|
int i; |
|
struct spider_net_descr *descr; |
|
struct spider_net_hw_descr *hwdescr; |
|
dma_addr_t buf; |
|
size_t alloc_size; |
|
|
|
alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); |
|
|
|
chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, |
|
&chain->dma_addr, GFP_KERNEL); |
|
if (!chain->hwring) |
|
return -ENOMEM; |
|
|
|
/* Set up the hardware pointers in each descriptor */ |
|
descr = chain->ring; |
|
hwdescr = chain->hwring; |
|
buf = chain->dma_addr; |
|
for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { |
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
|
hwdescr->next_descr_addr = 0; |
|
|
|
descr->hwdescr = hwdescr; |
|
descr->bus_addr = buf; |
|
descr->next = descr + 1; |
|
descr->prev = descr - 1; |
|
|
|
buf += sizeof(struct spider_net_hw_descr); |
|
} |
|
/* do actual circular list */ |
|
(descr-1)->next = chain->ring; |
|
chain->ring->prev = descr-1; |
|
|
|
spin_lock_init(&chain->lock); |
|
chain->head = chain->ring; |
|
chain->tail = chain->ring; |
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_free_rx_chain_contents - frees descr contents in rx chain |
|
* @card: card structure |
|
* |
|
* returns 0 on success, <0 on failure |
|
*/ |
|
static void |
|
spider_net_free_rx_chain_contents(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr *descr; |
|
|
|
descr = card->rx_chain.head; |
|
do { |
|
if (descr->skb) { |
|
pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, |
|
SPIDER_NET_MAX_FRAME, |
|
PCI_DMA_BIDIRECTIONAL); |
|
dev_kfree_skb(descr->skb); |
|
descr->skb = NULL; |
|
} |
|
descr = descr->next; |
|
} while (descr != card->rx_chain.head); |
|
} |
|
|
|
/** |
|
* spider_net_prepare_rx_descr - Reinitialize RX descriptor |
|
* @card: card structure |
|
* @descr: descriptor to re-init |
|
* |
|
* Return 0 on success, <0 on failure. |
|
* |
|
* Allocates a new rx skb, iommu-maps it and attaches it to the |
|
* descriptor. Mark the descriptor as activated, ready-to-use. |
|
*/ |
|
static int |
|
spider_net_prepare_rx_descr(struct spider_net_card *card, |
|
struct spider_net_descr *descr) |
|
{ |
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
|
dma_addr_t buf; |
|
int offset; |
|
int bufsize; |
|
|
|
/* we need to round up the buffer size to a multiple of 128 */ |
|
bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
|
(~(SPIDER_NET_RXBUF_ALIGN - 1)); |
|
|
|
/* and we need to have it 128 byte aligned, therefore we allocate a |
|
* bit more |
|
*/ |
|
/* allocate an skb */ |
|
descr->skb = netdev_alloc_skb(card->netdev, |
|
bufsize + SPIDER_NET_RXBUF_ALIGN - 1); |
|
if (!descr->skb) { |
|
if (netif_msg_rx_err(card) && net_ratelimit()) |
|
dev_err(&card->netdev->dev, |
|
"Not enough memory to allocate rx buffer\n"); |
|
card->spider_stats.alloc_rx_skb_error++; |
|
return -ENOMEM; |
|
} |
|
hwdescr->buf_size = bufsize; |
|
hwdescr->result_size = 0; |
|
hwdescr->valid_size = 0; |
|
hwdescr->data_status = 0; |
|
hwdescr->data_error = 0; |
|
|
|
offset = ((unsigned long)descr->skb->data) & |
|
(SPIDER_NET_RXBUF_ALIGN - 1); |
|
if (offset) |
|
skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); |
|
/* iommu-map the skb */ |
|
buf = pci_map_single(card->pdev, descr->skb->data, |
|
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
|
if (pci_dma_mapping_error(card->pdev, buf)) { |
|
dev_kfree_skb_any(descr->skb); |
|
descr->skb = NULL; |
|
if (netif_msg_rx_err(card) && net_ratelimit()) |
|
dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); |
|
card->spider_stats.rx_iommu_map_error++; |
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
|
} else { |
|
hwdescr->buf_addr = buf; |
|
wmb(); |
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | |
|
SPIDER_NET_DMAC_NOINTR_COMPLETE; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
|
* @card: card structure |
|
* |
|
* spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the |
|
* chip by writing to the appropriate register. DMA is enabled in |
|
* spider_net_enable_rxdmac. |
|
*/ |
|
static inline void |
|
spider_net_enable_rxchtails(struct spider_net_card *card) |
|
{ |
|
/* assume chain is aligned correctly */ |
|
spider_net_write_reg(card, SPIDER_NET_GDADCHA , |
|
card->rx_chain.tail->bus_addr); |
|
} |
|
|
|
/** |
|
* spider_net_enable_rxdmac - enables a receive DMA controller |
|
* @card: card structure |
|
* |
|
* spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN |
|
* in the GDADMACCNTR register |
|
*/ |
|
static inline void |
|
spider_net_enable_rxdmac(struct spider_net_card *card) |
|
{ |
|
wmb(); |
|
spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
|
SPIDER_NET_DMA_RX_VALUE); |
|
} |
|
|
|
/** |
|
* spider_net_disable_rxdmac - disables the receive DMA controller |
|
* @card: card structure |
|
* |
|
* spider_net_disable_rxdmac terminates processing on the DMA controller |
|
* by turing off the DMA controller, with the force-end flag set. |
|
*/ |
|
static inline void |
|
spider_net_disable_rxdmac(struct spider_net_card *card) |
|
{ |
|
spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
|
SPIDER_NET_DMA_RX_FEND_VALUE); |
|
} |
|
|
|
/** |
|
* spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains |
|
* @card: card structure |
|
* |
|
* refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
|
*/ |
|
static void |
|
spider_net_refill_rx_chain(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
unsigned long flags; |
|
|
|
/* one context doing the refill (and a second context seeing that |
|
* and omitting it) is ok. If called by NAPI, we'll be called again |
|
* as spider_net_decode_one_descr is called several times. If some |
|
* interrupt calls us, the NAPI is about to clean up anyway. |
|
*/ |
|
if (!spin_trylock_irqsave(&chain->lock, flags)) |
|
return; |
|
|
|
while (spider_net_get_descr_status(chain->head->hwdescr) == |
|
SPIDER_NET_DESCR_NOT_IN_USE) { |
|
if (spider_net_prepare_rx_descr(card, chain->head)) |
|
break; |
|
chain->head = chain->head->next; |
|
} |
|
|
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
} |
|
|
|
/** |
|
* spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains |
|
* @card: card structure |
|
* |
|
* Returns 0 on success, <0 on failure. |
|
*/ |
|
static int |
|
spider_net_alloc_rx_skbs(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
struct spider_net_descr *start = chain->tail; |
|
struct spider_net_descr *descr = start; |
|
|
|
/* Link up the hardware chain pointers */ |
|
do { |
|
descr->prev->hwdescr->next_descr_addr = descr->bus_addr; |
|
descr = descr->next; |
|
} while (descr != start); |
|
|
|
/* Put at least one buffer into the chain. if this fails, |
|
* we've got a problem. If not, spider_net_refill_rx_chain |
|
* will do the rest at the end of this function. |
|
*/ |
|
if (spider_net_prepare_rx_descr(card, chain->head)) |
|
goto error; |
|
else |
|
chain->head = chain->head->next; |
|
|
|
/* This will allocate the rest of the rx buffers; |
|
* if not, it's business as usual later on. |
|
*/ |
|
spider_net_refill_rx_chain(card); |
|
spider_net_enable_rxdmac(card); |
|
return 0; |
|
|
|
error: |
|
spider_net_free_rx_chain_contents(card); |
|
return -ENOMEM; |
|
} |
|
|
|
/** |
|
* spider_net_get_multicast_hash - generates hash for multicast filter table |
|
* @netdev: interface device structure |
|
* @addr: multicast address |
|
* |
|
* returns the hash value. |
|
* |
|
* spider_net_get_multicast_hash calculates a hash value for a given multicast |
|
* address, that is used to set the multicast filter tables |
|
*/ |
|
static u8 |
|
spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) |
|
{ |
|
u32 crc; |
|
u8 hash; |
|
char addr_for_crc[ETH_ALEN] = { 0, }; |
|
int i, bit; |
|
|
|
for (i = 0; i < ETH_ALEN * 8; i++) { |
|
bit = (addr[i / 8] >> (i % 8)) & 1; |
|
addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); |
|
} |
|
|
|
crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
|
|
|
hash = (crc >> 27); |
|
hash <<= 3; |
|
hash |= crc & 7; |
|
hash &= 0xff; |
|
|
|
return hash; |
|
} |
|
|
|
/** |
|
* spider_net_set_multi - sets multicast addresses and promisc flags |
|
* @netdev: interface device structure |
|
* |
|
* spider_net_set_multi configures multicast addresses as needed for the |
|
* netdev interface. It also sets up multicast, allmulti and promisc |
|
* flags appropriately |
|
*/ |
|
static void |
|
spider_net_set_multi(struct net_device *netdev) |
|
{ |
|
struct netdev_hw_addr *ha; |
|
u8 hash; |
|
int i; |
|
u32 reg; |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {}; |
|
|
|
spider_net_set_promisc(card); |
|
|
|
if (netdev->flags & IFF_ALLMULTI) { |
|
for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { |
|
set_bit(i, bitmask); |
|
} |
|
goto write_hash; |
|
} |
|
|
|
/* well, we know, what the broadcast hash value is: it's xfd |
|
hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ |
|
set_bit(0xfd, bitmask); |
|
|
|
netdev_for_each_mc_addr(ha, netdev) { |
|
hash = spider_net_get_multicast_hash(netdev, ha->addr); |
|
set_bit(hash, bitmask); |
|
} |
|
|
|
write_hash: |
|
for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { |
|
reg = 0; |
|
if (test_bit(i * 4, bitmask)) |
|
reg += 0x08; |
|
reg <<= 8; |
|
if (test_bit(i * 4 + 1, bitmask)) |
|
reg += 0x08; |
|
reg <<= 8; |
|
if (test_bit(i * 4 + 2, bitmask)) |
|
reg += 0x08; |
|
reg <<= 8; |
|
if (test_bit(i * 4 + 3, bitmask)) |
|
reg += 0x08; |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); |
|
} |
|
} |
|
|
|
/** |
|
* spider_net_prepare_tx_descr - fill tx descriptor with skb data |
|
* @card: card structure |
|
* @skb: packet to use |
|
* |
|
* returns 0 on success, <0 on failure. |
|
* |
|
* fills out the descriptor structure with skb data and len. Copies data, |
|
* if needed (32bit DMA!) |
|
*/ |
|
static int |
|
spider_net_prepare_tx_descr(struct spider_net_card *card, |
|
struct sk_buff *skb) |
|
{ |
|
struct spider_net_descr_chain *chain = &card->tx_chain; |
|
struct spider_net_descr *descr; |
|
struct spider_net_hw_descr *hwdescr; |
|
dma_addr_t buf; |
|
unsigned long flags; |
|
|
|
buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
|
if (pci_dma_mapping_error(card->pdev, buf)) { |
|
if (netif_msg_tx_err(card) && net_ratelimit()) |
|
dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " |
|
"Dropping packet\n", skb->data, skb->len); |
|
card->spider_stats.tx_iommu_map_error++; |
|
return -ENOMEM; |
|
} |
|
|
|
spin_lock_irqsave(&chain->lock, flags); |
|
descr = card->tx_chain.head; |
|
if (descr->next == chain->tail->prev) { |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); |
|
return -ENOMEM; |
|
} |
|
hwdescr = descr->hwdescr; |
|
chain->head = descr->next; |
|
|
|
descr->skb = skb; |
|
hwdescr->buf_addr = buf; |
|
hwdescr->buf_size = skb->len; |
|
hwdescr->next_descr_addr = 0; |
|
hwdescr->data_status = 0; |
|
|
|
hwdescr->dmac_cmd_status = |
|
SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) |
|
switch (ip_hdr(skb)->protocol) { |
|
case IPPROTO_TCP: |
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; |
|
break; |
|
case IPPROTO_UDP: |
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; |
|
break; |
|
} |
|
|
|
/* Chain the bus address, so that the DMA engine finds this descr. */ |
|
wmb(); |
|
descr->prev->hwdescr->next_descr_addr = descr->bus_addr; |
|
|
|
netif_trans_update(card->netdev); /* set netdev watchdog timer */ |
|
return 0; |
|
} |
|
|
|
static int |
|
spider_net_set_low_watermark(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr *descr = card->tx_chain.tail; |
|
struct spider_net_hw_descr *hwdescr; |
|
unsigned long flags; |
|
int status; |
|
int cnt=0; |
|
int i; |
|
|
|
/* Measure the length of the queue. Measurement does not |
|
* need to be precise -- does not need a lock. |
|
*/ |
|
while (descr != card->tx_chain.head) { |
|
status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; |
|
if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
|
break; |
|
descr = descr->next; |
|
cnt++; |
|
} |
|
|
|
/* If TX queue is short, don't even bother with interrupts */ |
|
if (cnt < card->tx_chain.num_desc/4) |
|
return cnt; |
|
|
|
/* Set low-watermark 3/4th's of the way into the queue. */ |
|
descr = card->tx_chain.tail; |
|
cnt = (cnt*3)/4; |
|
for (i=0;i<cnt; i++) |
|
descr = descr->next; |
|
|
|
/* Set the new watermark, clear the old watermark */ |
|
spin_lock_irqsave(&card->tx_chain.lock, flags); |
|
descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; |
|
if (card->low_watermark && card->low_watermark != descr) { |
|
hwdescr = card->low_watermark->hwdescr; |
|
hwdescr->dmac_cmd_status = |
|
hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; |
|
} |
|
card->low_watermark = descr; |
|
spin_unlock_irqrestore(&card->tx_chain.lock, flags); |
|
return cnt; |
|
} |
|
|
|
/** |
|
* spider_net_release_tx_chain - processes sent tx descriptors |
|
* @card: adapter structure |
|
* @brutal: if set, don't care about whether descriptor seems to be in use |
|
* |
|
* returns 0 if the tx ring is empty, otherwise 1. |
|
* |
|
* spider_net_release_tx_chain releases the tx descriptors that spider has |
|
* finished with (if non-brutal) or simply release tx descriptors (if brutal). |
|
* If some other context is calling this function, we return 1 so that we're |
|
* scheduled again (if we were scheduled) and will not lose initiative. |
|
*/ |
|
static int |
|
spider_net_release_tx_chain(struct spider_net_card *card, int brutal) |
|
{ |
|
struct net_device *dev = card->netdev; |
|
struct spider_net_descr_chain *chain = &card->tx_chain; |
|
struct spider_net_descr *descr; |
|
struct spider_net_hw_descr *hwdescr; |
|
struct sk_buff *skb; |
|
u32 buf_addr; |
|
unsigned long flags; |
|
int status; |
|
|
|
while (1) { |
|
spin_lock_irqsave(&chain->lock, flags); |
|
if (chain->tail == chain->head) { |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
return 0; |
|
} |
|
descr = chain->tail; |
|
hwdescr = descr->hwdescr; |
|
|
|
status = spider_net_get_descr_status(hwdescr); |
|
switch (status) { |
|
case SPIDER_NET_DESCR_COMPLETE: |
|
dev->stats.tx_packets++; |
|
dev->stats.tx_bytes += descr->skb->len; |
|
break; |
|
|
|
case SPIDER_NET_DESCR_CARDOWNED: |
|
if (!brutal) { |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
return 1; |
|
} |
|
|
|
/* fallthrough, if we release the descriptors |
|
* brutally (then we don't care about |
|
* SPIDER_NET_DESCR_CARDOWNED) |
|
*/ |
|
fallthrough; |
|
|
|
case SPIDER_NET_DESCR_RESPONSE_ERROR: |
|
case SPIDER_NET_DESCR_PROTECTION_ERROR: |
|
case SPIDER_NET_DESCR_FORCE_END: |
|
if (netif_msg_tx_err(card)) |
|
dev_err(&card->netdev->dev, "forcing end of tx descriptor " |
|
"with status x%02x\n", status); |
|
dev->stats.tx_errors++; |
|
break; |
|
|
|
default: |
|
dev->stats.tx_dropped++; |
|
if (!brutal) { |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
return 1; |
|
} |
|
} |
|
|
|
chain->tail = descr->next; |
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; |
|
skb = descr->skb; |
|
descr->skb = NULL; |
|
buf_addr = hwdescr->buf_addr; |
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
|
|
/* unmap the skb */ |
|
if (skb) { |
|
pci_unmap_single(card->pdev, buf_addr, skb->len, |
|
PCI_DMA_TODEVICE); |
|
dev_consume_skb_any(skb); |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_kick_tx_dma - enables TX DMA processing |
|
* @card: card structure |
|
* |
|
* This routine will start the transmit DMA running if |
|
* it is not already running. This routine ned only be |
|
* called when queueing a new packet to an empty tx queue. |
|
* Writes the current tx chain head as start address |
|
* of the tx descriptor chain and enables the transmission |
|
* DMA engine. |
|
*/ |
|
static inline void |
|
spider_net_kick_tx_dma(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr *descr; |
|
|
|
if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & |
|
SPIDER_NET_TX_DMA_EN) |
|
goto out; |
|
|
|
descr = card->tx_chain.tail; |
|
for (;;) { |
|
if (spider_net_get_descr_status(descr->hwdescr) == |
|
SPIDER_NET_DESCR_CARDOWNED) { |
|
spider_net_write_reg(card, SPIDER_NET_GDTDCHA, |
|
descr->bus_addr); |
|
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
|
SPIDER_NET_DMA_TX_VALUE); |
|
break; |
|
} |
|
if (descr == card->tx_chain.head) |
|
break; |
|
descr = descr->next; |
|
} |
|
|
|
out: |
|
mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); |
|
} |
|
|
|
/** |
|
* spider_net_xmit - transmits a frame over the device |
|
* @skb: packet to send out |
|
* @netdev: interface device structure |
|
* |
|
* returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure |
|
*/ |
|
static netdev_tx_t |
|
spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) |
|
{ |
|
int cnt; |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
|
|
spider_net_release_tx_chain(card, 0); |
|
|
|
if (spider_net_prepare_tx_descr(card, skb) != 0) { |
|
netdev->stats.tx_dropped++; |
|
netif_stop_queue(netdev); |
|
return NETDEV_TX_BUSY; |
|
} |
|
|
|
cnt = spider_net_set_low_watermark(card); |
|
if (cnt < 5) |
|
spider_net_kick_tx_dma(card); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
/** |
|
* spider_net_cleanup_tx_ring - cleans up the TX ring |
|
* @t: timer context used to obtain the pointer to net card data structure |
|
* |
|
* spider_net_cleanup_tx_ring is called by either the tx_timer |
|
* or from the NAPI polling routine. |
|
* This routine releases resources associted with transmitted |
|
* packets, including updating the queue tail pointer. |
|
*/ |
|
static void |
|
spider_net_cleanup_tx_ring(struct timer_list *t) |
|
{ |
|
struct spider_net_card *card = from_timer(card, t, tx_timer); |
|
if ((spider_net_release_tx_chain(card, 0) != 0) && |
|
(card->netdev->flags & IFF_UP)) { |
|
spider_net_kick_tx_dma(card); |
|
netif_wake_queue(card->netdev); |
|
} |
|
} |
|
|
|
/** |
|
* spider_net_do_ioctl - called for device ioctls |
|
* @netdev: interface device structure |
|
* @ifr: request parameter structure for ioctl |
|
* @cmd: command code for ioctl |
|
* |
|
* returns 0 on success, <0 on failure. Currently, we have no special ioctls. |
|
* -EOPNOTSUPP is returned, if an unknown ioctl was requested |
|
*/ |
|
static int |
|
spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
|
{ |
|
switch (cmd) { |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
/** |
|
* spider_net_pass_skb_up - takes an skb from a descriptor and passes it on |
|
* @descr: descriptor to process |
|
* @card: card structure |
|
* |
|
* Fills out skb structure and passes the data to the stack. |
|
* The descriptor state is not changed. |
|
*/ |
|
static void |
|
spider_net_pass_skb_up(struct spider_net_descr *descr, |
|
struct spider_net_card *card) |
|
{ |
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
|
struct sk_buff *skb = descr->skb; |
|
struct net_device *netdev = card->netdev; |
|
u32 data_status = hwdescr->data_status; |
|
u32 data_error = hwdescr->data_error; |
|
|
|
skb_put(skb, hwdescr->valid_size); |
|
|
|
/* the card seems to add 2 bytes of junk in front |
|
* of the ethernet frame |
|
*/ |
|
#define SPIDER_MISALIGN 2 |
|
skb_pull(skb, SPIDER_MISALIGN); |
|
skb->protocol = eth_type_trans(skb, netdev); |
|
|
|
/* checksum offload */ |
|
skb_checksum_none_assert(skb); |
|
if (netdev->features & NETIF_F_RXCSUM) { |
|
if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
|
SPIDER_NET_DATA_STATUS_CKSUM_MASK) && |
|
!(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) |
|
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
} |
|
|
|
if (data_status & SPIDER_NET_VLAN_PACKET) { |
|
/* further enhancements: HW-accel VLAN */ |
|
} |
|
|
|
/* update netdevice statistics */ |
|
netdev->stats.rx_packets++; |
|
netdev->stats.rx_bytes += skb->len; |
|
|
|
/* pass skb up to stack */ |
|
netif_receive_skb(skb); |
|
} |
|
|
|
static void show_rx_chain(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
struct spider_net_descr *start= chain->tail; |
|
struct spider_net_descr *descr= start; |
|
struct spider_net_hw_descr *hwd = start->hwdescr; |
|
struct device *dev = &card->netdev->dev; |
|
u32 curr_desc, next_desc; |
|
int status; |
|
|
|
int tot = 0; |
|
int cnt = 0; |
|
int off = start - chain->ring; |
|
int cstat = hwd->dmac_cmd_status; |
|
|
|
dev_info(dev, "Total number of descrs=%d\n", |
|
chain->num_desc); |
|
dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", |
|
off, cstat); |
|
|
|
curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); |
|
next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); |
|
|
|
status = cstat; |
|
do |
|
{ |
|
hwd = descr->hwdescr; |
|
off = descr - chain->ring; |
|
status = hwd->dmac_cmd_status; |
|
|
|
if (descr == chain->head) |
|
dev_info(dev, "Chain head is at %d, head status=0x%x\n", |
|
off, status); |
|
|
|
if (curr_desc == descr->bus_addr) |
|
dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", |
|
off, status); |
|
|
|
if (next_desc == descr->bus_addr) |
|
dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", |
|
off, status); |
|
|
|
if (hwd->next_descr_addr == 0) |
|
dev_info(dev, "chain is cut at %d\n", off); |
|
|
|
if (cstat != status) { |
|
int from = (chain->num_desc + off - cnt) % chain->num_desc; |
|
int to = (chain->num_desc + off - 1) % chain->num_desc; |
|
dev_info(dev, "Have %d (from %d to %d) descrs " |
|
"with stat=0x%08x\n", cnt, from, to, cstat); |
|
cstat = status; |
|
cnt = 0; |
|
} |
|
|
|
cnt ++; |
|
tot ++; |
|
descr = descr->next; |
|
} while (descr != start); |
|
|
|
dev_info(dev, "Last %d descrs with stat=0x%08x " |
|
"for a total of %d descrs\n", cnt, cstat, tot); |
|
|
|
#ifdef DEBUG |
|
/* Now dump the whole ring */ |
|
descr = start; |
|
do |
|
{ |
|
struct spider_net_hw_descr *hwd = descr->hwdescr; |
|
status = spider_net_get_descr_status(hwd); |
|
cnt = descr - chain->ring; |
|
dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", |
|
cnt, status, descr->skb); |
|
dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", |
|
descr->bus_addr, hwd->buf_addr, hwd->buf_size); |
|
dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", |
|
hwd->next_descr_addr, hwd->result_size, |
|
hwd->valid_size); |
|
dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", |
|
hwd->dmac_cmd_status, hwd->data_status, |
|
hwd->data_error); |
|
dev_info(dev, "\n"); |
|
|
|
descr = descr->next; |
|
} while (descr != start); |
|
#endif |
|
|
|
} |
|
|
|
/** |
|
* spider_net_resync_head_ptr - Advance head ptr past empty descrs |
|
* @card: card structure |
|
* |
|
* If the driver fails to keep up and empty the queue, then the |
|
* hardware wil run out of room to put incoming packets. This |
|
* will cause the hardware to skip descrs that are full (instead |
|
* of halting/retrying). Thus, once the driver runs, it wil need |
|
* to "catch up" to where the hardware chain pointer is at. |
|
*/ |
|
static void spider_net_resync_head_ptr(struct spider_net_card *card) |
|
{ |
|
unsigned long flags; |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
struct spider_net_descr *descr; |
|
int i, status; |
|
|
|
/* Advance head pointer past any empty descrs */ |
|
descr = chain->head; |
|
status = spider_net_get_descr_status(descr->hwdescr); |
|
|
|
if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
|
return; |
|
|
|
spin_lock_irqsave(&chain->lock, flags); |
|
|
|
descr = chain->head; |
|
status = spider_net_get_descr_status(descr->hwdescr); |
|
for (i=0; i<chain->num_desc; i++) { |
|
if (status != SPIDER_NET_DESCR_CARDOWNED) break; |
|
descr = descr->next; |
|
status = spider_net_get_descr_status(descr->hwdescr); |
|
} |
|
chain->head = descr; |
|
|
|
spin_unlock_irqrestore(&chain->lock, flags); |
|
} |
|
|
|
static int spider_net_resync_tail_ptr(struct spider_net_card *card) |
|
{ |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
struct spider_net_descr *descr; |
|
int i, status; |
|
|
|
/* Advance tail pointer past any empty and reaped descrs */ |
|
descr = chain->tail; |
|
status = spider_net_get_descr_status(descr->hwdescr); |
|
|
|
for (i=0; i<chain->num_desc; i++) { |
|
if ((status != SPIDER_NET_DESCR_CARDOWNED) && |
|
(status != SPIDER_NET_DESCR_NOT_IN_USE)) break; |
|
descr = descr->next; |
|
status = spider_net_get_descr_status(descr->hwdescr); |
|
} |
|
chain->tail = descr; |
|
|
|
if ((i == chain->num_desc) || (i == 0)) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_decode_one_descr - processes an RX descriptor |
|
* @card: card structure |
|
* |
|
* Returns 1 if a packet has been sent to the stack, otherwise 0. |
|
* |
|
* Processes an RX descriptor by iommu-unmapping the data buffer |
|
* and passing the packet up to the stack. This function is called |
|
* in softirq context, e.g. either bottom half from interrupt or |
|
* NAPI polling context. |
|
*/ |
|
static int |
|
spider_net_decode_one_descr(struct spider_net_card *card) |
|
{ |
|
struct net_device *dev = card->netdev; |
|
struct spider_net_descr_chain *chain = &card->rx_chain; |
|
struct spider_net_descr *descr = chain->tail; |
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
|
u32 hw_buf_addr; |
|
int status; |
|
|
|
status = spider_net_get_descr_status(hwdescr); |
|
|
|
/* Nothing in the descriptor, or ring must be empty */ |
|
if ((status == SPIDER_NET_DESCR_CARDOWNED) || |
|
(status == SPIDER_NET_DESCR_NOT_IN_USE)) |
|
return 0; |
|
|
|
/* descriptor definitively used -- move on tail */ |
|
chain->tail = descr->next; |
|
|
|
/* unmap descriptor */ |
|
hw_buf_addr = hwdescr->buf_addr; |
|
hwdescr->buf_addr = 0xffffffff; |
|
pci_unmap_single(card->pdev, hw_buf_addr, |
|
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
|
|
|
if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || |
|
(status == SPIDER_NET_DESCR_PROTECTION_ERROR) || |
|
(status == SPIDER_NET_DESCR_FORCE_END) ) { |
|
if (netif_msg_rx_err(card)) |
|
dev_err(&dev->dev, |
|
"dropping RX descriptor with state %d\n", status); |
|
dev->stats.rx_dropped++; |
|
goto bad_desc; |
|
} |
|
|
|
if ( (status != SPIDER_NET_DESCR_COMPLETE) && |
|
(status != SPIDER_NET_DESCR_FRAME_END) ) { |
|
if (netif_msg_rx_err(card)) |
|
dev_err(&card->netdev->dev, |
|
"RX descriptor with unknown state %d\n", status); |
|
card->spider_stats.rx_desc_unk_state++; |
|
goto bad_desc; |
|
} |
|
|
|
/* The cases we'll throw away the packet immediately */ |
|
if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
|
if (netif_msg_rx_err(card)) |
|
dev_err(&card->netdev->dev, |
|
"error in received descriptor found, " |
|
"data_status=x%08x, data_error=x%08x\n", |
|
hwdescr->data_status, hwdescr->data_error); |
|
goto bad_desc; |
|
} |
|
|
|
if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { |
|
dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", |
|
hwdescr->dmac_cmd_status); |
|
pr_err("buf_addr=x%08x\n", hw_buf_addr); |
|
pr_err("buf_size=x%08x\n", hwdescr->buf_size); |
|
pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); |
|
pr_err("result_size=x%08x\n", hwdescr->result_size); |
|
pr_err("valid_size=x%08x\n", hwdescr->valid_size); |
|
pr_err("data_status=x%08x\n", hwdescr->data_status); |
|
pr_err("data_error=x%08x\n", hwdescr->data_error); |
|
pr_err("which=%ld\n", descr - card->rx_chain.ring); |
|
|
|
card->spider_stats.rx_desc_error++; |
|
goto bad_desc; |
|
} |
|
|
|
/* Ok, we've got a packet in descr */ |
|
spider_net_pass_skb_up(descr, card); |
|
descr->skb = NULL; |
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
|
return 1; |
|
|
|
bad_desc: |
|
if (netif_msg_rx_err(card)) |
|
show_rx_chain(card); |
|
dev_kfree_skb_irq(descr->skb); |
|
descr->skb = NULL; |
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_poll - NAPI poll function called by the stack to return packets |
|
* @napi: napi device structure |
|
* @budget: number of packets we can pass to the stack at most |
|
* |
|
* returns 0 if no more packets available to the driver/stack. Returns 1, |
|
* if the quota is exceeded, but the driver has still packets. |
|
* |
|
* spider_net_poll returns all packets from the rx descriptors to the stack |
|
* (using netif_receive_skb). If all/enough packets are up, the driver |
|
* reenables interrupts and returns 0. If not, 1 is returned. |
|
*/ |
|
static int spider_net_poll(struct napi_struct *napi, int budget) |
|
{ |
|
struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); |
|
int packets_done = 0; |
|
|
|
while (packets_done < budget) { |
|
if (!spider_net_decode_one_descr(card)) |
|
break; |
|
|
|
packets_done++; |
|
} |
|
|
|
if ((packets_done == 0) && (card->num_rx_ints != 0)) { |
|
if (!spider_net_resync_tail_ptr(card)) |
|
packets_done = budget; |
|
spider_net_resync_head_ptr(card); |
|
} |
|
card->num_rx_ints = 0; |
|
|
|
spider_net_refill_rx_chain(card); |
|
spider_net_enable_rxdmac(card); |
|
|
|
spider_net_cleanup_tx_ring(&card->tx_timer); |
|
|
|
/* if all packets are in the stack, enable interrupts and return 0 */ |
|
/* if not, return 1 */ |
|
if (packets_done < budget) { |
|
napi_complete_done(napi, packets_done); |
|
spider_net_rx_irq_on(card); |
|
card->ignore_rx_ramfull = 0; |
|
} |
|
|
|
return packets_done; |
|
} |
|
|
|
/** |
|
* spider_net_set_mac - sets the MAC of an interface |
|
* @netdev: interface device structure |
|
* @p: pointer to new MAC address |
|
* |
|
* Returns 0 on success, <0 on failure. Currently, we don't support this |
|
* and will always return EOPNOTSUPP. |
|
*/ |
|
static int |
|
spider_net_set_mac(struct net_device *netdev, void *p) |
|
{ |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
u32 macl, macu, regvalue; |
|
struct sockaddr *addr = p; |
|
|
|
if (!is_valid_ether_addr(addr->sa_data)) |
|
return -EADDRNOTAVAIL; |
|
|
|
memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); |
|
|
|
/* switch off GMACTPE and GMACRPE */ |
|
regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); |
|
regvalue &= ~((1 << 5) | (1 << 6)); |
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); |
|
|
|
/* write mac */ |
|
macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) + |
|
(netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]); |
|
macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]); |
|
spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); |
|
spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); |
|
|
|
/* switch GMACTPE and GMACRPE back on */ |
|
regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); |
|
regvalue |= ((1 << 5) | (1 << 6)); |
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); |
|
|
|
spider_net_set_promisc(card); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_link_reset |
|
* @netdev: net device structure |
|
* |
|
* This is called when the PHY_LINK signal is asserted. For the blade this is |
|
* not connected so we should never get here. |
|
* |
|
*/ |
|
static void |
|
spider_net_link_reset(struct net_device *netdev) |
|
{ |
|
|
|
struct spider_net_card *card = netdev_priv(netdev); |
|
|
|
del_timer_sync(&card->aneg_timer); |
|
|
|
/* clear interrupt, block further interrupts */ |
|
spider_net_write_reg(card, SPIDER_NET_GMACST, |
|
spider_net_read_reg(card, SPIDER_NET_GMACST)); |
|
spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); |
|
|
|
/* reset phy and setup aneg */ |
|
card->aneg_count = 0; |
|
card->medium = BCM54XX_COPPER; |
|
spider_net_setup_aneg(card); |
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
|
|
|
} |
|
|
|
/** |
|
* spider_net_handle_error_irq - handles errors raised by an interrupt |
|
* @card: card structure |
|
* @status_reg: interrupt status register 0 (GHIINT0STS) |
|
* @error_reg1: interrupt status register 1 (GHIINT1STS) |
|
* @error_reg2: interrupt status register 2 (GHIINT2STS) |
|
* |
|
* spider_net_handle_error_irq treats or ignores all error conditions |
|
* found when an interrupt is presented |
|
*/ |
|
static void |
|
spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, |
|
u32 error_reg1, u32 error_reg2) |
|
{ |
|
u32 i; |
|
int show_error = 1; |
|
|
|
/* check GHIINT0STS ************************************/ |
|
if (status_reg) |
|
for (i = 0; i < 32; i++) |
|
if (status_reg & (1<<i)) |
|
switch (i) |
|
{ |
|
/* let error_reg1 and error_reg2 evaluation decide, what to do |
|
case SPIDER_NET_PHYINT: |
|
case SPIDER_NET_GMAC2INT: |
|
case SPIDER_NET_GMAC1INT: |
|
case SPIDER_NET_GFIFOINT: |
|
case SPIDER_NET_DMACINT: |
|
case SPIDER_NET_GSYSINT: |
|
break; */ |
|
|
|
case SPIDER_NET_GIPSINT: |
|
show_error = 0; |
|
break; |
|
|
|
case SPIDER_NET_GPWOPCMPINT: |
|
/* PHY write operation completed */ |
|
show_error = 0; |
|
break; |
|
case SPIDER_NET_GPROPCMPINT: |
|
/* PHY read operation completed */ |
|
/* we don't use semaphores, as we poll for the completion |
|
* of the read operation in spider_net_read_phy. Should take |
|
* about 50 us |
|
*/ |
|
show_error = 0; |
|
break; |
|
case SPIDER_NET_GPWFFINT: |
|
/* PHY command queue full */ |
|
if (netif_msg_intr(card)) |
|
dev_err(&card->netdev->dev, "PHY write queue full\n"); |
|
show_error = 0; |
|
break; |
|
|
|
/* case SPIDER_NET_GRMDADRINT: not used. print a message */ |
|
/* case SPIDER_NET_GRMARPINT: not used. print a message */ |
|
/* case SPIDER_NET_GRMMPINT: not used. print a message */ |
|
|
|
case SPIDER_NET_GDTDEN0INT: |
|
/* someone has set TX_DMA_EN to 0 */ |
|
show_error = 0; |
|
break; |
|
|
|
case SPIDER_NET_GDDDEN0INT: |
|
case SPIDER_NET_GDCDEN0INT: |
|
case SPIDER_NET_GDBDEN0INT: |
|
case SPIDER_NET_GDADEN0INT: |
|
/* someone has set RX_DMA_EN to 0 */ |
|
show_error = 0; |
|
break; |
|
|
|
/* RX interrupts */ |
|
case SPIDER_NET_GDDFDCINT: |
|
case SPIDER_NET_GDCFDCINT: |
|
case SPIDER_NET_GDBFDCINT: |
|
case SPIDER_NET_GDAFDCINT: |
|
/* case SPIDER_NET_GDNMINT: not used. print a message */ |
|
/* case SPIDER_NET_GCNMINT: not used. print a message */ |
|
/* case SPIDER_NET_GBNMINT: not used. print a message */ |
|
/* case SPIDER_NET_GANMINT: not used. print a message */ |
|
/* case SPIDER_NET_GRFNMINT: not used. print a message */ |
|
show_error = 0; |
|
break; |
|
|
|
/* TX interrupts */ |
|
case SPIDER_NET_GDTFDCINT: |
|
show_error = 0; |
|
break; |
|
case SPIDER_NET_GTTEDINT: |
|
show_error = 0; |
|
break; |
|
case SPIDER_NET_GDTDCEINT: |
|
/* chain end. If a descriptor should be sent, kick off |
|
* tx dma |
|
if (card->tx_chain.tail != card->tx_chain.head) |
|
spider_net_kick_tx_dma(card); |
|
*/ |
|
show_error = 0; |
|
break; |
|
|
|
/* case SPIDER_NET_G1TMCNTINT: not used. print a message */ |
|
/* case SPIDER_NET_GFREECNTINT: not used. print a message */ |
|
} |
|
|
|
/* check GHIINT1STS ************************************/ |
|
if (error_reg1) |
|
for (i = 0; i < 32; i++) |
|
if (error_reg1 & (1<<i)) |
|
switch (i) |
|
{ |
|
case SPIDER_NET_GTMFLLINT: |
|
/* TX RAM full may happen on a usual case. |
|
* Logging is not needed. |
|
*/ |
|
show_error = 0; |
|
break; |
|
case SPIDER_NET_GRFDFLLINT: |
|
case SPIDER_NET_GRFCFLLINT: |
|
case SPIDER_NET_GRFBFLLINT: |
|
case SPIDER_NET_GRFAFLLINT: |
|
case SPIDER_NET_GRMFLLINT: |
|
/* Could happen when rx chain is full */ |
|
if (card->ignore_rx_ramfull == 0) { |
|
card->ignore_rx_ramfull = 1; |
|
spider_net_resync_head_ptr(card); |
|
spider_net_refill_rx_chain(card); |
|
spider_net_enable_rxdmac(card); |
|
card->num_rx_ints ++; |
|
napi_schedule(&card->napi); |
|
} |
|
show_error = 0; |
|
break; |
|
|
|
/* case SPIDER_NET_GTMSHTINT: problem, print a message */ |
|
case SPIDER_NET_GDTINVDINT: |
|
/* allrighty. tx from previous descr ok */ |
|
show_error = 0; |
|
break; |
|
|
|
/* chain end */ |
|
case SPIDER_NET_GDDDCEINT: |
|
case SPIDER_NET_GDCDCEINT: |
|
case SPIDER_NET_GDBDCEINT: |
|
case SPIDER_NET_GDADCEINT: |
|
spider_net_resync_head_ptr(card); |
|
spider_net_refill_rx_chain(card); |
|
spider_net_enable_rxdmac(card); |
|
card->num_rx_ints ++; |
|
napi_schedule(&card->napi); |
|
show_error = 0; |
|
break; |
|
|
|
/* invalid descriptor */ |
|
case SPIDER_NET_GDDINVDINT: |
|
case SPIDER_NET_GDCINVDINT: |
|
case SPIDER_NET_GDBINVDINT: |
|
case SPIDER_NET_GDAINVDINT: |
|
/* Could happen when rx chain is full */ |
|
spider_net_resync_head_ptr(card); |
|
spider_net_refill_rx_chain(card); |
|
spider_net_enable_rxdmac(card); |
|
card->num_rx_ints ++; |
|
napi_schedule(&card->napi); |
|
show_error = 0; |
|
break; |
|
|
|
/* case SPIDER_NET_GDTRSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDDRSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDCRSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDBRSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDARSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDSERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDTPTERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDDPTERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDCPTERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDBPTERINT: problem, print a message */ |
|
/* case SPIDER_NET_GDAPTERINT: problem, print a message */ |
|
default: |
|
show_error = 1; |
|
break; |
|
} |
|
|
|
/* check GHIINT2STS ************************************/ |
|
if (error_reg2) |
|
for (i = 0; i < 32; i++) |
|
if (error_reg2 & (1<<i)) |
|
switch (i) |
|
{ |
|
/* there is nothing we can (want to) do at this time. Log a |
|
* message, we can switch on and off the specific values later on |
|
case SPIDER_NET_GPROPERINT: |
|
case SPIDER_NET_GMCTCRSNGINT: |
|
case SPIDER_NET_GMCTLCOLINT: |
|
case SPIDER_NET_GMCTTMOTINT: |
|
case SPIDER_NET_GMCRCAERINT: |
|
case SPIDER_NET_GMCRCALERINT: |
|
case SPIDER_NET_GMCRALNERINT: |
|
case SPIDER_NET_GMCROVRINT: |
|
case SPIDER_NET_GMCRRNTINT: |
|
case SPIDER_NET_GMCRRXERINT: |
|
case SPIDER_NET_GTITCSERINT: |
|
case SPIDER_NET_GTIFMTERINT: |
|
case SPIDER_NET_GTIPKTRVKINT: |
|
case SPIDER_NET_GTISPINGINT: |
|
case SPIDER_NET_GTISADNGINT: |
|
case SPIDER_NET_GTISPDNGINT: |
|
case SPIDER_NET_GRIFMTERINT: |
|
case SPIDER_NET_GRIPKTRVKINT: |
|
case SPIDER_NET_GRISPINGINT: |
|
case SPIDER_NET_GRISADNGINT: |
|
case SPIDER_NET_GRISPDNGINT: |
|
break; |
|
*/ |
|
default: |
|
break; |
|
} |
|
|
|
if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) |
|
dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " |
|
"GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", |
|
status_reg, error_reg1, error_reg2); |
|
|
|
/* clear interrupt sources */ |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); |
|
} |
|
|
|
/** |
|
* spider_net_interrupt - interrupt handler for spider_net |
|
* @irq: interrupt number |
|
* @ptr: pointer to net_device |
|
* |
|
* returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no |
|
* interrupt found raised by card. |
|
* |
|
* This is the interrupt handler, that turns off |
|
* interrupts for this device and makes the stack poll the driver |
|
*/ |
|
static irqreturn_t |
|
spider_net_interrupt(int irq, void *ptr) |
|
{ |
|
struct net_device *netdev = ptr; |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
u32 status_reg, error_reg1, error_reg2; |
|
|
|
status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); |
|
error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); |
|
error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); |
|
|
|
if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && |
|
!(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && |
|
!(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) |
|
return IRQ_NONE; |
|
|
|
if (status_reg & SPIDER_NET_RXINT ) { |
|
spider_net_rx_irq_off(card); |
|
napi_schedule(&card->napi); |
|
card->num_rx_ints ++; |
|
} |
|
if (status_reg & SPIDER_NET_TXINT) |
|
napi_schedule(&card->napi); |
|
|
|
if (status_reg & SPIDER_NET_LINKINT) |
|
spider_net_link_reset(netdev); |
|
|
|
if (status_reg & SPIDER_NET_ERRINT ) |
|
spider_net_handle_error_irq(card, status_reg, |
|
error_reg1, error_reg2); |
|
|
|
/* clear interrupt sources */ |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
/** |
|
* spider_net_poll_controller - artificial interrupt for netconsole etc. |
|
* @netdev: interface device structure |
|
* |
|
* see Documentation/networking/netconsole.rst |
|
*/ |
|
static void |
|
spider_net_poll_controller(struct net_device *netdev) |
|
{ |
|
disable_irq(netdev->irq); |
|
spider_net_interrupt(netdev->irq, netdev); |
|
enable_irq(netdev->irq); |
|
} |
|
#endif /* CONFIG_NET_POLL_CONTROLLER */ |
|
|
|
/** |
|
* spider_net_enable_interrupts - enable interrupts |
|
* @card: card structure |
|
* |
|
* spider_net_enable_interrupt enables several interrupts |
|
*/ |
|
static void |
|
spider_net_enable_interrupts(struct spider_net_card *card) |
|
{ |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, |
|
SPIDER_NET_INT0_MASK_VALUE); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, |
|
SPIDER_NET_INT1_MASK_VALUE); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, |
|
SPIDER_NET_INT2_MASK_VALUE); |
|
} |
|
|
|
/** |
|
* spider_net_disable_interrupts - disable interrupts |
|
* @card: card structure |
|
* |
|
* spider_net_disable_interrupts disables all the interrupts |
|
*/ |
|
static void |
|
spider_net_disable_interrupts(struct spider_net_card *card) |
|
{ |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); |
|
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); |
|
spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); |
|
} |
|
|
|
/** |
|
* spider_net_init_card - initializes the card |
|
* @card: card structure |
|
* |
|
* spider_net_init_card initializes the card so that other registers can |
|
* be used |
|
*/ |
|
static void |
|
spider_net_init_card(struct spider_net_card *card) |
|
{ |
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_STOP_VALUE); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_RUN_VALUE); |
|
|
|
/* trigger ETOMOD signal */ |
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
|
spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); |
|
|
|
spider_net_disable_interrupts(card); |
|
} |
|
|
|
/** |
|
* spider_net_enable_card - enables the card by setting all kinds of regs |
|
* @card: card structure |
|
* |
|
* spider_net_enable_card sets a lot of SMMIO registers to enable the device |
|
*/ |
|
static void |
|
spider_net_enable_card(struct spider_net_card *card) |
|
{ |
|
int i; |
|
/* the following array consists of (register),(value) pairs |
|
* that are set in this function. A register of 0 ends the list |
|
*/ |
|
u32 regs[][2] = { |
|
{ SPIDER_NET_GRESUMINTNUM, 0 }, |
|
{ SPIDER_NET_GREINTNUM, 0 }, |
|
|
|
/* set interrupt frame number registers */ |
|
/* clear the single DMA engine registers first */ |
|
{ SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
|
{ SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
|
{ SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
|
{ SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
|
/* then set, what we really need */ |
|
{ SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, |
|
|
|
/* timer counter registers and stuff */ |
|
{ SPIDER_NET_GFREECNNUM, 0 }, |
|
{ SPIDER_NET_GONETIMENUM, 0 }, |
|
{ SPIDER_NET_GTOUTFRMNUM, 0 }, |
|
|
|
/* RX mode setting */ |
|
{ SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, |
|
/* TX mode setting */ |
|
{ SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, |
|
/* IPSEC mode setting */ |
|
{ SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, |
|
|
|
{ SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, |
|
|
|
{ SPIDER_NET_GMRWOLCTRL, 0 }, |
|
{ SPIDER_NET_GTESTMD, 0x10000000 }, |
|
{ SPIDER_NET_GTTQMSK, 0x00400040 }, |
|
|
|
{ SPIDER_NET_GMACINTEN, 0 }, |
|
|
|
/* flow control stuff */ |
|
{ SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, |
|
{ SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, |
|
|
|
{ SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, |
|
{ 0, 0} |
|
}; |
|
|
|
i = 0; |
|
while (regs[i][0]) { |
|
spider_net_write_reg(card, regs[i][0], regs[i][1]); |
|
i++; |
|
} |
|
|
|
/* clear unicast filter table entries 1 to 14 */ |
|
for (i = 1; i <= 14; i++) { |
|
spider_net_write_reg(card, |
|
SPIDER_NET_GMRUAFILnR + i * 8, |
|
0x00080000); |
|
spider_net_write_reg(card, |
|
SPIDER_NET_GMRUAFILnR + i * 8 + 4, |
|
0x00000000); |
|
} |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); |
|
|
|
/* set chain tail address for RX chains and |
|
* enable DMA |
|
*/ |
|
spider_net_enable_rxchtails(card); |
|
spider_net_enable_rxdmac(card); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, |
|
SPIDER_NET_LENLMT_VALUE); |
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
|
SPIDER_NET_OPMODE_VALUE); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
|
SPIDER_NET_GDTBSTA); |
|
} |
|
|
|
/** |
|
* spider_net_download_firmware - loads firmware into the adapter |
|
* @card: card structure |
|
* @firmware_ptr: pointer to firmware data |
|
* |
|
* spider_net_download_firmware loads the firmware data into the |
|
* adapter. It assumes the length etc. to be allright. |
|
*/ |
|
static int |
|
spider_net_download_firmware(struct spider_net_card *card, |
|
const void *firmware_ptr) |
|
{ |
|
int sequencer, i; |
|
const u32 *fw_ptr = firmware_ptr; |
|
|
|
/* stop sequencers */ |
|
spider_net_write_reg(card, SPIDER_NET_GSINIT, |
|
SPIDER_NET_STOP_SEQ_VALUE); |
|
|
|
for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
|
sequencer++) { |
|
spider_net_write_reg(card, |
|
SPIDER_NET_GSnPRGADR + sequencer * 8, 0); |
|
for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
|
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
|
sequencer * 8, *fw_ptr); |
|
fw_ptr++; |
|
} |
|
} |
|
|
|
if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) |
|
return -EIO; |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GSINIT, |
|
SPIDER_NET_RUN_SEQ_VALUE); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_init_firmware - reads in firmware parts |
|
* @card: card structure |
|
* |
|
* Returns 0 on success, <0 on failure |
|
* |
|
* spider_net_init_firmware opens the sequencer firmware and does some basic |
|
* checks. This function opens and releases the firmware structure. A call |
|
* to download the firmware is performed before the release. |
|
* |
|
* Firmware format |
|
* =============== |
|
* spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being |
|
* the program for each sequencer. Use the command |
|
* tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ |
|
* Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ |
|
* Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin |
|
* |
|
* to generate spider_fw.bin, if you have sequencer programs with something |
|
* like the following contents for each sequencer: |
|
* <ONE LINE COMMENT> |
|
* <FIRST 4-BYTES-WORD FOR SEQUENCER> |
|
* <SECOND 4-BYTES-WORD FOR SEQUENCER> |
|
* ... |
|
* <1024th 4-BYTES-WORD FOR SEQUENCER> |
|
*/ |
|
static int |
|
spider_net_init_firmware(struct spider_net_card *card) |
|
{ |
|
struct firmware *firmware = NULL; |
|
struct device_node *dn; |
|
const u8 *fw_prop = NULL; |
|
int err = -ENOENT; |
|
int fw_size; |
|
|
|
if (request_firmware((const struct firmware **)&firmware, |
|
SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { |
|
if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && |
|
netif_msg_probe(card) ) { |
|
dev_err(&card->netdev->dev, |
|
"Incorrect size of spidernet firmware in " \ |
|
"filesystem. Looking in host firmware...\n"); |
|
goto try_host_fw; |
|
} |
|
err = spider_net_download_firmware(card, firmware->data); |
|
|
|
release_firmware(firmware); |
|
if (err) |
|
goto try_host_fw; |
|
|
|
goto done; |
|
} |
|
|
|
try_host_fw: |
|
dn = pci_device_to_OF_node(card->pdev); |
|
if (!dn) |
|
goto out_err; |
|
|
|
fw_prop = of_get_property(dn, "firmware", &fw_size); |
|
if (!fw_prop) |
|
goto out_err; |
|
|
|
if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && |
|
netif_msg_probe(card) ) { |
|
dev_err(&card->netdev->dev, |
|
"Incorrect size of spidernet firmware in host firmware\n"); |
|
goto done; |
|
} |
|
|
|
err = spider_net_download_firmware(card, fw_prop); |
|
|
|
done: |
|
return err; |
|
out_err: |
|
if (netif_msg_probe(card)) |
|
dev_err(&card->netdev->dev, |
|
"Couldn't find spidernet firmware in filesystem " \ |
|
"or host firmware\n"); |
|
return err; |
|
} |
|
|
|
/** |
|
* spider_net_open - called upon ifonfig up |
|
* @netdev: interface device structure |
|
* |
|
* returns 0 on success, <0 on failure |
|
* |
|
* spider_net_open allocates all the descriptors and memory needed for |
|
* operation, sets up multicast list and enables interrupts |
|
*/ |
|
int |
|
spider_net_open(struct net_device *netdev) |
|
{ |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
int result; |
|
|
|
result = spider_net_init_firmware(card); |
|
if (result) |
|
goto init_firmware_failed; |
|
|
|
/* start probing with copper */ |
|
card->aneg_count = 0; |
|
card->medium = BCM54XX_COPPER; |
|
spider_net_setup_aneg(card); |
|
if (card->phy.def->phy_id) |
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
|
|
|
result = spider_net_init_chain(card, &card->tx_chain); |
|
if (result) |
|
goto alloc_tx_failed; |
|
card->low_watermark = NULL; |
|
|
|
result = spider_net_init_chain(card, &card->rx_chain); |
|
if (result) |
|
goto alloc_rx_failed; |
|
|
|
/* Allocate rx skbs */ |
|
result = spider_net_alloc_rx_skbs(card); |
|
if (result) |
|
goto alloc_skbs_failed; |
|
|
|
spider_net_set_multi(netdev); |
|
|
|
/* further enhancement: setup hw vlan, if needed */ |
|
|
|
result = -EBUSY; |
|
if (request_irq(netdev->irq, spider_net_interrupt, |
|
IRQF_SHARED, netdev->name, netdev)) |
|
goto register_int_failed; |
|
|
|
spider_net_enable_card(card); |
|
|
|
netif_start_queue(netdev); |
|
netif_carrier_on(netdev); |
|
napi_enable(&card->napi); |
|
|
|
spider_net_enable_interrupts(card); |
|
|
|
return 0; |
|
|
|
register_int_failed: |
|
spider_net_free_rx_chain_contents(card); |
|
alloc_skbs_failed: |
|
spider_net_free_chain(card, &card->rx_chain); |
|
alloc_rx_failed: |
|
spider_net_free_chain(card, &card->tx_chain); |
|
alloc_tx_failed: |
|
del_timer_sync(&card->aneg_timer); |
|
init_firmware_failed: |
|
return result; |
|
} |
|
|
|
/** |
|
* spider_net_link_phy |
|
* @t: timer context used to obtain the pointer to net card data structure |
|
*/ |
|
static void spider_net_link_phy(struct timer_list *t) |
|
{ |
|
struct spider_net_card *card = from_timer(card, t, aneg_timer); |
|
struct mii_phy *phy = &card->phy; |
|
|
|
/* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ |
|
if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { |
|
|
|
pr_debug("%s: link is down trying to bring it up\n", |
|
card->netdev->name); |
|
|
|
switch (card->medium) { |
|
case BCM54XX_COPPER: |
|
/* enable fiber with autonegotiation first */ |
|
if (phy->def->ops->enable_fiber) |
|
phy->def->ops->enable_fiber(phy, 1); |
|
card->medium = BCM54XX_FIBER; |
|
break; |
|
|
|
case BCM54XX_FIBER: |
|
/* fiber didn't come up, try to disable fiber autoneg */ |
|
if (phy->def->ops->enable_fiber) |
|
phy->def->ops->enable_fiber(phy, 0); |
|
card->medium = BCM54XX_UNKNOWN; |
|
break; |
|
|
|
case BCM54XX_UNKNOWN: |
|
/* copper, fiber with and without failed, |
|
* retry from beginning |
|
*/ |
|
spider_net_setup_aneg(card); |
|
card->medium = BCM54XX_COPPER; |
|
break; |
|
} |
|
|
|
card->aneg_count = 0; |
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
|
return; |
|
} |
|
|
|
/* link still not up, try again later */ |
|
if (!(phy->def->ops->poll_link(phy))) { |
|
card->aneg_count++; |
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
|
return; |
|
} |
|
|
|
/* link came up, get abilities */ |
|
phy->def->ops->read_link(phy); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GMACST, |
|
spider_net_read_reg(card, SPIDER_NET_GMACST)); |
|
spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); |
|
|
|
if (phy->speed == 1000) |
|
spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); |
|
else |
|
spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); |
|
|
|
card->aneg_count = 0; |
|
|
|
pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", |
|
card->netdev->name, phy->speed, |
|
phy->duplex == 1 ? "Full" : "Half", |
|
phy->autoneg == 1 ? "" : "no "); |
|
} |
|
|
|
/** |
|
* spider_net_setup_phy - setup PHY |
|
* @card: card structure |
|
* |
|
* returns 0 on success, <0 on failure |
|
* |
|
* spider_net_setup_phy is used as part of spider_net_probe. |
|
**/ |
|
static int |
|
spider_net_setup_phy(struct spider_net_card *card) |
|
{ |
|
struct mii_phy *phy = &card->phy; |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, |
|
SPIDER_NET_DMASEL_VALUE); |
|
spider_net_write_reg(card, SPIDER_NET_GPCCTRL, |
|
SPIDER_NET_PHY_CTRL_VALUE); |
|
|
|
phy->dev = card->netdev; |
|
phy->mdio_read = spider_net_read_phy; |
|
phy->mdio_write = spider_net_write_phy; |
|
|
|
for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { |
|
unsigned short id; |
|
id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
|
if (id != 0x0000 && id != 0xffff) { |
|
if (!sungem_phy_probe(phy, phy->mii_id)) { |
|
pr_info("Found %s.\n", phy->def->name); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_workaround_rxramfull - work around firmware bug |
|
* @card: card structure |
|
* |
|
* no return value |
|
**/ |
|
static void |
|
spider_net_workaround_rxramfull(struct spider_net_card *card) |
|
{ |
|
int i, sequencer = 0; |
|
|
|
/* cancel reset */ |
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_RUN_VALUE); |
|
|
|
/* empty sequencer data */ |
|
for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
|
sequencer++) { |
|
spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
|
sequencer * 8, 0x0); |
|
for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
|
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
|
sequencer * 8, 0x0); |
|
} |
|
} |
|
|
|
/* set sequencer operation */ |
|
spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); |
|
|
|
/* reset */ |
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_STOP_VALUE); |
|
} |
|
|
|
/** |
|
* spider_net_stop - called upon ifconfig down |
|
* @netdev: interface device structure |
|
* |
|
* always returns 0 |
|
*/ |
|
int |
|
spider_net_stop(struct net_device *netdev) |
|
{ |
|
struct spider_net_card *card = netdev_priv(netdev); |
|
|
|
napi_disable(&card->napi); |
|
netif_carrier_off(netdev); |
|
netif_stop_queue(netdev); |
|
del_timer_sync(&card->tx_timer); |
|
del_timer_sync(&card->aneg_timer); |
|
|
|
spider_net_disable_interrupts(card); |
|
|
|
free_irq(netdev->irq, netdev); |
|
|
|
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
|
SPIDER_NET_DMA_TX_FEND_VALUE); |
|
|
|
/* turn off DMA, force end */ |
|
spider_net_disable_rxdmac(card); |
|
|
|
/* release chains */ |
|
spider_net_release_tx_chain(card, 1); |
|
spider_net_free_rx_chain_contents(card); |
|
|
|
spider_net_free_chain(card, &card->tx_chain); |
|
spider_net_free_chain(card, &card->rx_chain); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_tx_timeout_task - task scheduled by the watchdog timeout |
|
* function (to be called not under interrupt status) |
|
* @work: work context used to obtain the pointer to net card data structure |
|
* |
|
* called as task when tx hangs, resets interface (if interface is up) |
|
*/ |
|
static void |
|
spider_net_tx_timeout_task(struct work_struct *work) |
|
{ |
|
struct spider_net_card *card = |
|
container_of(work, struct spider_net_card, tx_timeout_task); |
|
struct net_device *netdev = card->netdev; |
|
|
|
if (!(netdev->flags & IFF_UP)) |
|
goto out; |
|
|
|
netif_device_detach(netdev); |
|
spider_net_stop(netdev); |
|
|
|
spider_net_workaround_rxramfull(card); |
|
spider_net_init_card(card); |
|
|
|
if (spider_net_setup_phy(card)) |
|
goto out; |
|
|
|
spider_net_open(netdev); |
|
spider_net_kick_tx_dma(card); |
|
netif_device_attach(netdev); |
|
|
|
out: |
|
atomic_dec(&card->tx_timeout_task_counter); |
|
} |
|
|
|
/** |
|
* spider_net_tx_timeout - called when the tx timeout watchdog kicks in. |
|
* @netdev: interface device structure |
|
* @txqueue: unused |
|
* |
|
* called, if tx hangs. Schedules a task that resets the interface |
|
*/ |
|
static void |
|
spider_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
|
{ |
|
struct spider_net_card *card; |
|
|
|
card = netdev_priv(netdev); |
|
atomic_inc(&card->tx_timeout_task_counter); |
|
if (netdev->flags & IFF_UP) |
|
schedule_work(&card->tx_timeout_task); |
|
else |
|
atomic_dec(&card->tx_timeout_task_counter); |
|
card->spider_stats.tx_timeouts++; |
|
} |
|
|
|
static const struct net_device_ops spider_net_ops = { |
|
.ndo_open = spider_net_open, |
|
.ndo_stop = spider_net_stop, |
|
.ndo_start_xmit = spider_net_xmit, |
|
.ndo_set_rx_mode = spider_net_set_multi, |
|
.ndo_set_mac_address = spider_net_set_mac, |
|
.ndo_do_ioctl = spider_net_do_ioctl, |
|
.ndo_tx_timeout = spider_net_tx_timeout, |
|
.ndo_validate_addr = eth_validate_addr, |
|
/* HW VLAN */ |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
/* poll controller */ |
|
.ndo_poll_controller = spider_net_poll_controller, |
|
#endif /* CONFIG_NET_POLL_CONTROLLER */ |
|
}; |
|
|
|
/** |
|
* spider_net_setup_netdev_ops - initialization of net_device operations |
|
* @netdev: net_device structure |
|
* |
|
* fills out function pointers in the net_device structure |
|
*/ |
|
static void |
|
spider_net_setup_netdev_ops(struct net_device *netdev) |
|
{ |
|
netdev->netdev_ops = &spider_net_ops; |
|
netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; |
|
/* ethtool ops */ |
|
netdev->ethtool_ops = &spider_net_ethtool_ops; |
|
} |
|
|
|
/** |
|
* spider_net_setup_netdev - initialization of net_device |
|
* @card: card structure |
|
* |
|
* Returns 0 on success or <0 on failure |
|
* |
|
* spider_net_setup_netdev initializes the net_device structure |
|
**/ |
|
static int |
|
spider_net_setup_netdev(struct spider_net_card *card) |
|
{ |
|
int result; |
|
struct net_device *netdev = card->netdev; |
|
struct device_node *dn; |
|
struct sockaddr addr; |
|
const u8 *mac; |
|
|
|
SET_NETDEV_DEV(netdev, &card->pdev->dev); |
|
|
|
pci_set_drvdata(card->pdev, netdev); |
|
|
|
timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0); |
|
netdev->irq = card->pdev->irq; |
|
|
|
card->aneg_count = 0; |
|
timer_setup(&card->aneg_timer, spider_net_link_phy, 0); |
|
|
|
netif_napi_add(netdev, &card->napi, |
|
spider_net_poll, SPIDER_NET_NAPI_WEIGHT); |
|
|
|
spider_net_setup_netdev_ops(netdev); |
|
|
|
netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; |
|
if (SPIDER_NET_RX_CSUM_DEFAULT) |
|
netdev->features |= NETIF_F_RXCSUM; |
|
netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX; |
|
/* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | |
|
* NETIF_F_HW_VLAN_CTAG_FILTER |
|
*/ |
|
|
|
/* MTU range: 64 - 2294 */ |
|
netdev->min_mtu = SPIDER_NET_MIN_MTU; |
|
netdev->max_mtu = SPIDER_NET_MAX_MTU; |
|
|
|
netdev->irq = card->pdev->irq; |
|
card->num_rx_ints = 0; |
|
card->ignore_rx_ramfull = 0; |
|
|
|
dn = pci_device_to_OF_node(card->pdev); |
|
if (!dn) |
|
return -EIO; |
|
|
|
mac = of_get_property(dn, "local-mac-address", NULL); |
|
if (!mac) |
|
return -EIO; |
|
memcpy(addr.sa_data, mac, ETH_ALEN); |
|
|
|
result = spider_net_set_mac(netdev, &addr); |
|
if ((result) && (netif_msg_probe(card))) |
|
dev_err(&card->netdev->dev, |
|
"Failed to set MAC address: %i\n", result); |
|
|
|
result = register_netdev(netdev); |
|
if (result) { |
|
if (netif_msg_probe(card)) |
|
dev_err(&card->netdev->dev, |
|
"Couldn't register net_device: %i\n", result); |
|
return result; |
|
} |
|
|
|
if (netif_msg_probe(card)) |
|
pr_info("Initialized device %s.\n", netdev->name); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* spider_net_alloc_card - allocates net_device and card structure |
|
* |
|
* returns the card structure or NULL in case of errors |
|
* |
|
* the card and net_device structures are linked to each other |
|
*/ |
|
static struct spider_net_card * |
|
spider_net_alloc_card(void) |
|
{ |
|
struct net_device *netdev; |
|
struct spider_net_card *card; |
|
|
|
netdev = alloc_etherdev(struct_size(card, darray, |
|
tx_descriptors + rx_descriptors)); |
|
if (!netdev) |
|
return NULL; |
|
|
|
card = netdev_priv(netdev); |
|
card->netdev = netdev; |
|
card->msg_enable = SPIDER_NET_DEFAULT_MSG; |
|
INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); |
|
init_waitqueue_head(&card->waitq); |
|
atomic_set(&card->tx_timeout_task_counter, 0); |
|
|
|
card->rx_chain.num_desc = rx_descriptors; |
|
card->rx_chain.ring = card->darray; |
|
card->tx_chain.num_desc = tx_descriptors; |
|
card->tx_chain.ring = card->darray + rx_descriptors; |
|
|
|
return card; |
|
} |
|
|
|
/** |
|
* spider_net_undo_pci_setup - releases PCI ressources |
|
* @card: card structure |
|
* |
|
* spider_net_undo_pci_setup releases the mapped regions |
|
*/ |
|
static void |
|
spider_net_undo_pci_setup(struct spider_net_card *card) |
|
{ |
|
iounmap(card->regs); |
|
pci_release_regions(card->pdev); |
|
} |
|
|
|
/** |
|
* spider_net_setup_pci_dev - sets up the device in terms of PCI operations |
|
* @pdev: PCI device |
|
* |
|
* Returns the card structure or NULL if any errors occur |
|
* |
|
* spider_net_setup_pci_dev initializes pdev and together with the |
|
* functions called in spider_net_open configures the device so that |
|
* data can be transferred over it |
|
* The net_device structure is attached to the card structure, if the |
|
* function returns without error. |
|
**/ |
|
static struct spider_net_card * |
|
spider_net_setup_pci_dev(struct pci_dev *pdev) |
|
{ |
|
struct spider_net_card *card; |
|
unsigned long mmio_start, mmio_len; |
|
|
|
if (pci_enable_device(pdev)) { |
|
dev_err(&pdev->dev, "Couldn't enable PCI device\n"); |
|
return NULL; |
|
} |
|
|
|
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { |
|
dev_err(&pdev->dev, |
|
"Couldn't find proper PCI device base address.\n"); |
|
goto out_disable_dev; |
|
} |
|
|
|
if (pci_request_regions(pdev, spider_net_driver_name)) { |
|
dev_err(&pdev->dev, |
|
"Couldn't obtain PCI resources, aborting.\n"); |
|
goto out_disable_dev; |
|
} |
|
|
|
pci_set_master(pdev); |
|
|
|
card = spider_net_alloc_card(); |
|
if (!card) { |
|
dev_err(&pdev->dev, |
|
"Couldn't allocate net_device structure, aborting.\n"); |
|
goto out_release_regions; |
|
} |
|
card->pdev = pdev; |
|
|
|
/* fetch base address and length of first resource */ |
|
mmio_start = pci_resource_start(pdev, 0); |
|
mmio_len = pci_resource_len(pdev, 0); |
|
|
|
card->netdev->mem_start = mmio_start; |
|
card->netdev->mem_end = mmio_start + mmio_len; |
|
card->regs = ioremap(mmio_start, mmio_len); |
|
|
|
if (!card->regs) { |
|
dev_err(&pdev->dev, |
|
"Couldn't obtain PCI resources, aborting.\n"); |
|
goto out_release_regions; |
|
} |
|
|
|
return card; |
|
|
|
out_release_regions: |
|
pci_release_regions(pdev); |
|
out_disable_dev: |
|
pci_disable_device(pdev); |
|
return NULL; |
|
} |
|
|
|
/** |
|
* spider_net_probe - initialization of a device |
|
* @pdev: PCI device |
|
* @ent: entry in the device id list |
|
* |
|
* Returns 0 on success, <0 on failure |
|
* |
|
* spider_net_probe initializes pdev and registers a net_device |
|
* structure for it. After that, the device can be ifconfig'ed up |
|
**/ |
|
static int |
|
spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
|
{ |
|
int err = -EIO; |
|
struct spider_net_card *card; |
|
|
|
card = spider_net_setup_pci_dev(pdev); |
|
if (!card) |
|
goto out; |
|
|
|
spider_net_workaround_rxramfull(card); |
|
spider_net_init_card(card); |
|
|
|
err = spider_net_setup_phy(card); |
|
if (err) |
|
goto out_undo_pci; |
|
|
|
err = spider_net_setup_netdev(card); |
|
if (err) |
|
goto out_undo_pci; |
|
|
|
return 0; |
|
|
|
out_undo_pci: |
|
spider_net_undo_pci_setup(card); |
|
free_netdev(card->netdev); |
|
out: |
|
return err; |
|
} |
|
|
|
/** |
|
* spider_net_remove - removal of a device |
|
* @pdev: PCI device |
|
* |
|
* Returns 0 on success, <0 on failure |
|
* |
|
* spider_net_remove is called to remove the device and unregisters the |
|
* net_device |
|
**/ |
|
static void |
|
spider_net_remove(struct pci_dev *pdev) |
|
{ |
|
struct net_device *netdev; |
|
struct spider_net_card *card; |
|
|
|
netdev = pci_get_drvdata(pdev); |
|
card = netdev_priv(netdev); |
|
|
|
wait_event(card->waitq, |
|
atomic_read(&card->tx_timeout_task_counter) == 0); |
|
|
|
unregister_netdev(netdev); |
|
|
|
/* switch off card */ |
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_STOP_VALUE); |
|
spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
|
SPIDER_NET_CKRCTRL_RUN_VALUE); |
|
|
|
spider_net_undo_pci_setup(card); |
|
free_netdev(netdev); |
|
} |
|
|
|
static struct pci_driver spider_net_driver = { |
|
.name = spider_net_driver_name, |
|
.id_table = spider_net_pci_tbl, |
|
.probe = spider_net_probe, |
|
.remove = spider_net_remove |
|
}; |
|
|
|
/** |
|
* spider_net_init - init function when the driver is loaded |
|
* |
|
* spider_net_init registers the device driver |
|
*/ |
|
static int __init spider_net_init(void) |
|
{ |
|
printk(KERN_INFO "Spidernet version %s.\n", VERSION); |
|
|
|
if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { |
|
rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; |
|
pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); |
|
} |
|
if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { |
|
rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; |
|
pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); |
|
} |
|
if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { |
|
tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; |
|
pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); |
|
} |
|
if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { |
|
tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; |
|
pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); |
|
} |
|
|
|
return pci_register_driver(&spider_net_driver); |
|
} |
|
|
|
/** |
|
* spider_net_cleanup - exit function when driver is unloaded |
|
* |
|
* spider_net_cleanup unregisters the device driver |
|
*/ |
|
static void __exit spider_net_cleanup(void) |
|
{ |
|
pci_unregister_driver(&spider_net_driver); |
|
} |
|
|
|
module_init(spider_net_init); |
|
module_exit(spider_net_cleanup);
|
|
|