endchoice
+choice
+ prompt "Select the DMA TX/RX descriptor operating modes"
+ depends on STMMAC_ETH
+ ---help---
+ This driver supports DMA descriptor to operate both in dual buffer
+ (RING) and linked-list(CHAINED) mode. In RING mode each descriptor
+ points to two data buffer pointers whereas in CHAINED mode they
+ points to only one data buffer pointer.
+
+config STMMAC_RING
+ bool "Enable Descriptor Ring Mode"
+
+config STMMAC_CHAINED
+ bool "Enable Descriptor Chained Mode"
+
+endchoice
+
+
endif
obj-$(CONFIG_STMMAC_ETH) += stmmac.o
stmmac-$(CONFIG_STMMAC_TIMER) += stmmac_timer.o
+stmmac-$(CONFIG_STMMAC_RING) += ring_mode.o
+stmmac-$(CONFIG_STMMAC_CHAINED) += chain_mode.o
stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o \
dwmac_lib.o dwmac1000_core.o dwmac1000_dma.o \
dwmac100_core.o dwmac100_dma.o enh_desc.o norm_desc.o \
--- /dev/null
+/*******************************************************************************
+ Specialised functions for managing Chained mode
+
+ Copyright(C) 2011 STMicroelectronics Ltd
+
+ It defines all the functions used to handle the normal/enhanced
+ descriptors in case of the DMA is configured to work in chained or
+ in ring mode.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms and conditions of the GNU General Public License,
+ version 2, as published by the Free Software Foundation.
+
+ This program is distributed in the hope it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+ The full GNU General Public License is included in this distribution in
+ the file called "COPYING".
+
+ Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include "stmmac.h"
+
+unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
+{
+ struct stmmac_priv *priv = (struct stmmac_priv *) p;
+ unsigned int txsize = priv->dma_tx_size;
+ unsigned int entry = priv->cur_tx % txsize;
+ struct dma_desc *desc = priv->dma_tx + entry;
+ unsigned int nopaged_len = skb_headlen(skb);
+ unsigned int bmax;
+ unsigned int i = 1, len;
+
+ if (priv->plat->enh_desc)
+ bmax = BUF_SIZE_8KiB;
+ else
+ bmax = BUF_SIZE_2KiB;
+
+ len = nopaged_len - bmax;
+
+ desc->des2 = dma_map_single(priv->device, skb->data,
+ bmax, DMA_TO_DEVICE);
+ priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum);
+
+ while (len != 0) {
+ entry = (++priv->cur_tx) % txsize;
+ desc = priv->dma_tx + entry;
+
+ if (len > bmax) {
+ desc->des2 = dma_map_single(priv->device,
+ (skb->data + bmax * i),
+ bmax, DMA_TO_DEVICE);
+ priv->hw->desc->prepare_tx_desc(desc, 0, bmax,
+ csum);
+ priv->hw->desc->set_tx_owner(desc);
+ priv->tx_skbuff[entry] = NULL;
+ len -= bmax;
+ i++;
+ } else {
+ desc->des2 = dma_map_single(priv->device,
+ (skb->data + bmax * i), len,
+ DMA_TO_DEVICE);
+ priv->hw->desc->prepare_tx_desc(desc, 0, len,
+ csum);
+ priv->hw->desc->set_tx_owner(desc);
+ priv->tx_skbuff[entry] = NULL;
+ len = 0;
+ }
+ }
+ return entry;
+}
+
+static unsigned int stmmac_is_jumbo_frm(int len, int enh_desc)
+{
+ unsigned int ret = 0;
+
+ if ((enh_desc && (len > BUF_SIZE_8KiB)) ||
+ (!enh_desc && (len > BUF_SIZE_2KiB))) {
+ ret = 1;
+ }
+
+ return ret;
+}
+
+static void stmmac_refill_desc3(int bfsize, struct dma_desc *p)
+{
+}
+
+static void stmmac_init_desc3(int des3_as_data_buf, struct dma_desc *p)
+{
+}
+
+static void stmmac_clean_desc3(struct dma_desc *p)
+{
+}
+
+static void stmmac_init_dma_chain(struct dma_desc *des, dma_addr_t phy_addr,
+ unsigned int size)
+{
+ /*
+ * In chained mode the des3 points to the next element in the ring.
+ * The latest element has to point to the head.
+ */
+ int i;
+ struct dma_desc *p = des;
+ dma_addr_t dma_phy = phy_addr;
+
+ for (i = 0; i < (size - 1); i++) {
+ dma_phy += sizeof(struct dma_desc);
+ p->des3 = (unsigned int)dma_phy;
+ p++;
+ }
+ p->des3 = (unsigned int)phy_addr;
+}
+
+static int stmmac_set_16kib_bfsize(int mtu)
+{
+ /* Not supported */
+ return 0;
+}
+
+const struct stmmac_ring_mode_ops ring_mode_ops = {
+ .is_jumbo_frm = stmmac_is_jumbo_frm,
+ .jumbo_frm = stmmac_jumbo_frm,
+ .refill_desc3 = stmmac_refill_desc3,
+ .init_desc3 = stmmac_init_desc3,
+ .init_dma_chain = stmmac_init_dma_chain,
+ .clean_desc3 = stmmac_clean_desc3,
+ .set_16kib_bfsize = stmmac_set_16kib_bfsize,
+};
unsigned int data; /* MII Data */
};
+struct stmmac_ring_mode_ops {
+ unsigned int (*is_jumbo_frm) (int len, int ehn_desc);
+ unsigned int (*jumbo_frm) (void *priv, struct sk_buff *skb, int csum);
+ void (*refill_desc3) (int bfsize, struct dma_desc *p);
+ void (*init_desc3) (int des3_as_data_buf, struct dma_desc *p);
+ void (*init_dma_chain) (struct dma_desc *des, dma_addr_t phy_addr,
+ unsigned int size);
+ void (*clean_desc3) (struct dma_desc *p);
+ int (*set_16kib_bfsize) (int mtu);
+};
+
struct mac_device_info {
const struct stmmac_ops *mac;
const struct stmmac_desc_ops *desc;
const struct stmmac_dma_ops *dma;
+ const struct stmmac_ring_mode_ops *ring;
struct mii_regs mii; /* MII register Addresses */
struct mac_link link;
unsigned int synopsys_uid;
extern void stmmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
unsigned int high, unsigned int low);
extern void dwmac_dma_flush_tx_fifo(void __iomem *ioaddr);
+extern const struct stmmac_ring_mode_ops ring_mode_ops;
--- /dev/null
+/*******************************************************************************
+ Header File to describe Normal/enhanced descriptor functions used for RING
+ and CHAINED modes.
+
+ Copyright(C) 2011 STMicroelectronics Ltd
+
+ It defines all the functions used to handle the normal/enhanced
+ descriptors in case of the DMA is configured to work in chained or
+ in ring mode.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms and conditions of the GNU General Public License,
+ version 2, as published by the Free Software Foundation.
+
+ This program is distributed in the hope it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+ The full GNU General Public License is included in this distribution in
+ the file called "COPYING".
+
+ Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#if defined(CONFIG_STMMAC_RING)
+static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ p->des01.erx.buffer2_size = BUF_SIZE_8KiB - 1;
+ if (end)
+ p->des01.erx.end_ring = 1;
+}
+
+static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ if (end)
+ p->des01.etx.end_ring = 1;
+}
+
+static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter)
+{
+ p->des01.etx.end_ring = ter;
+}
+
+static inline void enh_set_tx_desc_len(struct dma_desc *p, int len)
+{
+ if (unlikely(len > BUF_SIZE_4KiB)) {
+ p->des01.etx.buffer1_size = BUF_SIZE_4KiB;
+ p->des01.etx.buffer2_size = len - BUF_SIZE_4KiB;
+ } else
+ p->des01.etx.buffer1_size = len;
+}
+
+static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ p->des01.rx.buffer2_size = BUF_SIZE_2KiB - 1;
+ if (end)
+ p->des01.rx.end_ring = 1;
+}
+
+static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ if (end)
+ p->des01.tx.end_ring = 1;
+}
+
+static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter)
+{
+ p->des01.tx.end_ring = ter;
+}
+
+static inline void norm_set_tx_desc_len(struct dma_desc *p, int len)
+{
+ if (unlikely(len > BUF_SIZE_2KiB)) {
+ p->des01.etx.buffer1_size = BUF_SIZE_2KiB - 1;
+ p->des01.etx.buffer2_size = len - p->des01.etx.buffer1_size;
+ } else
+ p->des01.tx.buffer1_size = len;
+}
+
+#else
+
+static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ p->des01.erx.second_address_chained = 1;
+}
+
+static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ p->des01.etx.second_address_chained = 1;
+}
+
+static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter)
+{
+ p->des01.etx.second_address_chained = 1;
+}
+
+static inline void enh_set_tx_desc_len(struct dma_desc *p, int len)
+{
+ p->des01.etx.buffer1_size = len;
+}
+
+static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end)
+{
+ p->des01.rx.second_address_chained = 1;
+}
+
+static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int ring_size)
+{
+ p->des01.tx.second_address_chained = 1;
+}
+
+static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter)
+{
+ p->des01.tx.second_address_chained = 1;
+}
+
+static inline void norm_set_tx_desc_len(struct dma_desc *p, int len)
+{
+ p->des01.tx.buffer1_size = len;
+}
+#endif
*******************************************************************************/
#include "common.h"
+#include "descs_com.h"
static int enh_desc_get_tx_status(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p, void __iomem *ioaddr)
for (i = 0; i < ring_size; i++) {
p->des01.erx.own = 1;
p->des01.erx.buffer1_size = BUF_SIZE_8KiB - 1;
- /* To support jumbo frames */
- p->des01.erx.buffer2_size = BUF_SIZE_8KiB - 1;
- if (i == ring_size - 1)
- p->des01.erx.end_ring = 1;
+
+ ehn_desc_rx_set_on_ring_chain(p, (i == ring_size - 1));
+
if (disable_rx_ic)
p->des01.erx.disable_ic = 1;
p++;
for (i = 0; i < ring_size; i++) {
p->des01.etx.own = 0;
- if (i == ring_size - 1)
- p->des01.etx.end_ring = 1;
+ ehn_desc_tx_set_on_ring_chain(p, (i == ring_size - 1));
p++;
}
}
int ter = p->des01.etx.end_ring;
memset(p, 0, offsetof(struct dma_desc, des2));
- p->des01.etx.end_ring = ter;
+ enh_desc_end_tx_desc(p, ter);
}
static void enh_desc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
int csum_flag)
{
p->des01.etx.first_segment = is_fs;
- if (unlikely(len > BUF_SIZE_4KiB)) {
- p->des01.etx.buffer1_size = BUF_SIZE_4KiB;
- p->des01.etx.buffer2_size = len - BUF_SIZE_4KiB;
- } else {
- p->des01.etx.buffer1_size = len;
- }
+
+ enh_set_tx_desc_len(p, len);
+
if (likely(csum_flag))
p->des01.etx.checksum_insertion = cic_full;
}
*******************************************************************************/
#include "common.h"
+#include "descs_com.h"
static int ndesc_get_tx_status(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p, void __iomem *ioaddr)
for (i = 0; i < ring_size; i++) {
p->des01.rx.own = 1;
p->des01.rx.buffer1_size = BUF_SIZE_2KiB - 1;
- p->des01.rx.buffer2_size = BUF_SIZE_2KiB - 1;
- if (i == ring_size - 1)
- p->des01.rx.end_ring = 1;
+
+ ndesc_rx_set_on_ring_chain(p, (i == ring_size - 1));
+
if (disable_rx_ic)
p->des01.rx.disable_ic = 1;
p++;
int i;
for (i = 0; i < ring_size; i++) {
p->des01.tx.own = 0;
- if (i == ring_size - 1)
- p->des01.tx.end_ring = 1;
+ ndesc_tx_set_on_ring_chain(p, (i == (ring_size - 1)));
p++;
}
}
int ter = p->des01.tx.end_ring;
memset(p, 0, offsetof(struct dma_desc, des2));
- /* set termination field */
- p->des01.tx.end_ring = ter;
+ ndesc_end_tx_desc(p, ter);
}
static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
int csum_flag)
{
p->des01.tx.first_segment = is_fs;
-
- if (unlikely(len > BUF_SIZE_2KiB)) {
- p->des01.etx.buffer1_size = BUF_SIZE_2KiB - 1;
- p->des01.etx.buffer2_size = len - p->des01.etx.buffer1_size;
- } else
- p->des01.tx.buffer1_size = len;
+ norm_set_tx_desc_len(p, len);
}
static void ndesc_clear_tx_ic(struct dma_desc *p)
--- /dev/null
+/*******************************************************************************
+ Specialised functions for managing Ring mode
+
+ Copyright(C) 2011 STMicroelectronics Ltd
+
+ It defines all the functions used to handle the normal/enhanced
+ descriptors in case of the DMA is configured to work in chained or
+ in ring mode.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms and conditions of the GNU General Public License,
+ version 2, as published by the Free Software Foundation.
+
+ This program is distributed in the hope it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+ The full GNU General Public License is included in this distribution in
+ the file called "COPYING".
+
+ Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include "stmmac.h"
+
+static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
+{
+ struct stmmac_priv *priv = (struct stmmac_priv *) p;
+ unsigned int txsize = priv->dma_tx_size;
+ unsigned int entry = priv->cur_tx % txsize;
+ struct dma_desc *desc = priv->dma_tx + entry;
+ unsigned int nopaged_len = skb_headlen(skb);
+ unsigned int bmax, len;
+
+ if (priv->plat->enh_desc)
+ bmax = BUF_SIZE_8KiB;
+ else
+ bmax = BUF_SIZE_2KiB;
+
+ len = nopaged_len - bmax;
+
+ if (nopaged_len > BUF_SIZE_8KiB) {
+
+ desc->des2 = dma_map_single(priv->device, skb->data,
+ bmax, DMA_TO_DEVICE);
+ desc->des3 = desc->des2 + BUF_SIZE_4KiB;
+ priv->hw->desc->prepare_tx_desc(desc, 1, bmax,
+ csum);
+
+ entry = (++priv->cur_tx) % txsize;
+ desc = priv->dma_tx + entry;
+
+ desc->des2 = dma_map_single(priv->device, skb->data + bmax,
+ len, DMA_TO_DEVICE);
+ desc->des3 = desc->des2 + BUF_SIZE_4KiB;
+ priv->hw->desc->prepare_tx_desc(desc, 0, len, csum);
+ priv->hw->desc->set_tx_owner(desc);
+ priv->tx_skbuff[entry] = NULL;
+ } else {
+ desc->des2 = dma_map_single(priv->device, skb->data,
+ nopaged_len, DMA_TO_DEVICE);
+ desc->des3 = desc->des2 + BUF_SIZE_4KiB;
+ priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, csum);
+ }
+
+ return entry;
+}
+
+static unsigned int stmmac_is_jumbo_frm(int len, int enh_desc)
+{
+ unsigned int ret = 0;
+
+ if (len >= BUF_SIZE_4KiB)
+ ret = 1;
+
+ return ret;
+}
+
+static void stmmac_refill_desc3(int bfsize, struct dma_desc *p)
+{
+ /* Fill DES3 in case of RING mode */
+ if (bfsize >= BUF_SIZE_8KiB)
+ p->des3 = p->des2 + BUF_SIZE_8KiB;
+}
+
+/* In ring mode we need to fill the desc3 because it is used
+ * as buffer */
+static void stmmac_init_desc3(int des3_as_data_buf, struct dma_desc *p)
+{
+ if (unlikely(des3_as_data_buf))
+ p->des3 = p->des2 + BUF_SIZE_8KiB;
+}
+
+static void stmmac_init_dma_chain(struct dma_desc *des, dma_addr_t phy_addr,
+ unsigned int size)
+{
+}
+
+static void stmmac_clean_desc3(struct dma_desc *p)
+{
+ if (unlikely(p->des3))
+ p->des3 = 0;
+}
+
+static int stmmac_set_16kib_bfsize(int mtu)
+{
+ int ret = 0;
+ if (unlikely(mtu >= BUF_SIZE_8KiB))
+ ret = BUF_SIZE_16KiB;
+ return ret;
+}
+
+const struct stmmac_ring_mode_ops ring_mode_ops = {
+ .is_jumbo_frm = stmmac_is_jumbo_frm,
+ .jumbo_frm = stmmac_jumbo_frm,
+ .refill_desc3 = stmmac_refill_desc3,
+ .init_desc3 = stmmac_init_desc3,
+ .init_dma_chain = stmmac_init_dma_chain,
+ .clean_desc3 = stmmac_clean_desc3,
+ .set_16kib_bfsize = stmmac_set_16kib_bfsize,
+};
#define DRV_MODULE_VERSION "Oct_2011"
#include <linux/stmmac.h>
-
+#include <linux/phy.h>
#include "common.h"
#ifdef CONFIG_STMMAC_TIMER
#include "stmmac_timer.h"
This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.
ST Ethernet IPs are built around a Synopsys IP Core.
- Copyright (C) 2007-2009 STMicroelectronics Ltd
+ Copyright(C) 2007-2011 STMicroelectronics Ltd
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
#include <linux/if_ether.h>
#include <linux/crc32.h>
#include <linux/mii.h>
-#include <linux/phy.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/prefetch.h>
-#include "stmmac.h"
#ifdef CONFIG_STMMAC_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#endif
+#include "stmmac.h"
#define STMMAC_RESOURCE_NAME "stmmaceth"
}
}
+static int stmmac_set_bfsize(int mtu, int bufsize)
+{
+ int ret = bufsize;
+
+ if (mtu >= BUF_SIZE_4KiB)
+ ret = BUF_SIZE_8KiB;
+ else if (mtu >= BUF_SIZE_2KiB)
+ ret = BUF_SIZE_4KiB;
+ else if (mtu >= DMA_BUFFER_SIZE)
+ ret = BUF_SIZE_2KiB;
+ else
+ ret = DMA_BUFFER_SIZE;
+
+ return ret;
+}
+
/**
* init_dma_desc_rings - init the RX/TX descriptor rings
* @dev: net device structure
* Description: this function initializes the DMA RX/TX descriptors
- * and allocates the socket buffers.
+ * and allocates the socket buffers. It suppors the chained and ring
+ * modes.
*/
static void init_dma_desc_rings(struct net_device *dev)
{
struct sk_buff *skb;
unsigned int txsize = priv->dma_tx_size;
unsigned int rxsize = priv->dma_rx_size;
- unsigned int bfsize = priv->dma_buf_sz;
- int buff2_needed = 0, dis_ic = 0;
+ unsigned int bfsize;
+ int dis_ic = 0;
+ int des3_as_data_buf = 0;
- /* Set the Buffer size according to the MTU;
- * indeed, in case of jumbo we need to bump-up the buffer sizes.
- */
- if (unlikely(dev->mtu >= BUF_SIZE_8KiB))
- bfsize = BUF_SIZE_16KiB;
- else if (unlikely(dev->mtu >= BUF_SIZE_4KiB))
- bfsize = BUF_SIZE_8KiB;
- else if (unlikely(dev->mtu >= BUF_SIZE_2KiB))
- bfsize = BUF_SIZE_4KiB;
- else if (unlikely(dev->mtu >= DMA_BUFFER_SIZE))
- bfsize = BUF_SIZE_2KiB;
+ /* Set the max buffer size according to the DESC mode
+ * and the MTU. Note that RING mode allows 16KiB bsize. */
+ bfsize = priv->hw->ring->set_16kib_bfsize(dev->mtu);
+
+ if (bfsize == BUF_SIZE_16KiB)
+ des3_as_data_buf = 1;
else
- bfsize = DMA_BUFFER_SIZE;
+ bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz);
#ifdef CONFIG_STMMAC_TIMER
/* Disable interrupts on completion for the reception if timer is on */
if (likely(priv->tm->enable))
dis_ic = 1;
#endif
- /* If the MTU exceeds 8k so use the second buffer in the chain */
- if (bfsize >= BUF_SIZE_8KiB)
- buff2_needed = 1;
DBG(probe, INFO, "stmmac: txsize %d, rxsize %d, bfsize %d\n",
txsize, rxsize, bfsize);
return;
}
- DBG(probe, INFO, "stmmac (%s) DMA desc rings: virt addr (Rx %p, "
+ DBG(probe, INFO, "stmmac (%s) DMA desc: virt addr (Rx %p, "
"Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n",
dev->name, priv->dma_rx, priv->dma_tx,
(unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy);
bfsize, DMA_FROM_DEVICE);
p->des2 = priv->rx_skbuff_dma[i];
- if (unlikely(buff2_needed))
- p->des3 = p->des2 + BUF_SIZE_8KiB;
+
+ priv->hw->ring->init_desc3(des3_as_data_buf, p);
+
DBG(probe, INFO, "[%p]\t[%p]\t[%x]\n", priv->rx_skbuff[i],
priv->rx_skbuff[i]->data, priv->rx_skbuff_dma[i]);
}
priv->tx_skbuff[i] = NULL;
priv->dma_tx[i].des2 = 0;
}
+
+ /* In case of Chained mode this sets the des3 to the next
+ * element in the chain */
+ priv->hw->ring->init_dma_chain(priv->dma_rx, priv->dma_rx_phy, rxsize);
+ priv->hw->ring->init_dma_chain(priv->dma_tx, priv->dma_tx_phy, txsize);
+
priv->dirty_tx = 0;
priv->cur_tx = 0;
dma_unmap_single(priv->device, p->des2,
priv->hw->desc->get_tx_len(p),
DMA_TO_DEVICE);
- if (unlikely(p->des3))
- p->des3 = 0;
+ priv->hw->ring->clean_desc3(p);
if (likely(skb != NULL)) {
/*
*/
static void stmmac_tx_err(struct stmmac_priv *priv)
{
-
netif_stop_queue(priv->dev);
priv->hw->dma->stop_tx(priv->ioaddr);
return 0;
}
-static unsigned int stmmac_handle_jumbo_frames(struct sk_buff *skb,
- struct net_device *dev,
- int csum_insertion)
-{
- struct stmmac_priv *priv = netdev_priv(dev);
- unsigned int nopaged_len = skb_headlen(skb);
- unsigned int txsize = priv->dma_tx_size;
- unsigned int entry = priv->cur_tx % txsize;
- struct dma_desc *desc = priv->dma_tx + entry;
-
- if (nopaged_len > BUF_SIZE_8KiB) {
-
- int buf2_size = nopaged_len - BUF_SIZE_8KiB;
-
- desc->des2 = dma_map_single(priv->device, skb->data,
- BUF_SIZE_8KiB, DMA_TO_DEVICE);
- desc->des3 = desc->des2 + BUF_SIZE_4KiB;
- priv->hw->desc->prepare_tx_desc(desc, 1, BUF_SIZE_8KiB,
- csum_insertion);
-
- entry = (++priv->cur_tx) % txsize;
- desc = priv->dma_tx + entry;
-
- desc->des2 = dma_map_single(priv->device,
- skb->data + BUF_SIZE_8KiB,
- buf2_size, DMA_TO_DEVICE);
- desc->des3 = desc->des2 + BUF_SIZE_4KiB;
- priv->hw->desc->prepare_tx_desc(desc, 0, buf2_size,
- csum_insertion);
- priv->hw->desc->set_tx_owner(desc);
- priv->tx_skbuff[entry] = NULL;
- } else {
- desc->des2 = dma_map_single(priv->device, skb->data,
- nopaged_len, DMA_TO_DEVICE);
- desc->des3 = desc->des2 + BUF_SIZE_4KiB;
- priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
- csum_insertion);
- }
- return entry;
-}
-
/**
* stmmac_xmit:
* @skb : the socket buffer
int i, csum_insertion = 0;
int nfrags = skb_shinfo(skb)->nr_frags;
struct dma_desc *desc, *first;
+ unsigned int nopaged_len = skb_headlen(skb);
if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) {
if (!netif_queue_stopped(dev)) {
pr_info("stmmac xmit:\n"
"\tskb addr %p - len: %d - nopaged_len: %d\n"
"\tn_frags: %d - ip_summed: %d - %s gso\n",
- skb, skb->len, skb_headlen(skb), nfrags, skb->ip_summed,
+ skb, skb->len, nopaged_len, nfrags, skb->ip_summed,
!skb_is_gso(skb) ? "isn't" : "is");
#endif
if ((nfrags > 0) || (skb->len > ETH_FRAME_LEN))
pr_debug("stmmac xmit: skb len: %d, nopaged_len: %d,\n"
"\t\tn_frags: %d, ip_summed: %d\n",
- skb->len, skb_headlen(skb), nfrags, skb->ip_summed);
+ skb->len, nopaged_len, nfrags, skb->ip_summed);
#endif
priv->tx_skbuff[entry] = skb;
- if (unlikely(skb->len >= BUF_SIZE_4KiB)) {
- entry = stmmac_handle_jumbo_frames(skb, dev, csum_insertion);
+
+ if (priv->hw->ring->is_jumbo_frm(skb->len, priv->plat->enh_desc)) {
+ entry = priv->hw->ring->jumbo_frm(priv, skb, csum_insertion);
desc = priv->dma_tx + entry;
} else {
- unsigned int nopaged_len = skb_headlen(skb);
desc->des2 = dma_map_single(priv->device, skb->data,
nopaged_len, DMA_TO_DEVICE);
priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
DMA_FROM_DEVICE);
(p + entry)->des2 = priv->rx_skbuff_dma[entry];
- if (unlikely(priv->plat->has_gmac)) {
- if (bfsize >= BUF_SIZE_8KiB)
- (p + entry)->des3 =
- (p + entry)->des2 + BUF_SIZE_8KiB;
- }
+
+ if (unlikely(priv->plat->has_gmac))
+ priv->hw->ring->refill_desc3(bfsize, p + entry);
+
RX_DBG(KERN_INFO "\trefill entry #%d\n", entry);
}
wmb();
device->desc = &ndesc_ops;
priv->hw = device;
+ priv->hw->ring = &ring_mode_ops;
if (device_can_wakeup(priv->device)) {
priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */
projects / users / hch / configfs.git / commitdiff