diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/Makefile | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/chain_mode.c | 137 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/common.h | 13 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/descs_com.h | 126 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/enh_desc.c | 22 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/norm_desc.c | 20 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/ring_mode.c | 126 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 130 |
10 files changed, 491 insertions, 105 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 8cd9ddec05a0..ac6f190743dd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -63,4 +63,22 @@ config STMMAC_RTC_TIMER 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 diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 0f23d95746b7..d7c45164ea79 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -1,5 +1,7 @@ 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 \ diff --git a/drivers/net/ethernet/stmicro/stmmac/chain_mode.c b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c new file mode 100644 index 000000000000..0668659803ed --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/chain_mode.c @@ -0,0 +1,137 @@ +/******************************************************************************* + 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, +}; diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h index ffba0144fa38..9100c100d295 100644 --- a/drivers/net/ethernet/stmicro/stmmac/common.h +++ b/drivers/net/ethernet/stmicro/stmmac/common.h @@ -287,10 +287,22 @@ struct mii_regs { 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; @@ -304,3 +316,4 @@ extern void stmmac_set_mac_addr(void __iomem *ioaddr, u8 addr[6], 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; diff --git a/drivers/net/ethernet/stmicro/stmmac/descs_com.h b/drivers/net/ethernet/stmicro/stmmac/descs_com.h new file mode 100644 index 000000000000..dd8d6e19dff6 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/descs_com.h @@ -0,0 +1,126 @@ +/******************************************************************************* + 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 diff --git a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c index e5dfb6a30182..d87976364ec5 100644 --- a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c +++ b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c @@ -23,6 +23,7 @@ *******************************************************************************/ #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) @@ -233,10 +234,9 @@ static void enh_desc_init_rx_desc(struct dma_desc *p, unsigned int ring_size, 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++; @@ -249,8 +249,7 @@ static void enh_desc_init_tx_desc(struct dma_desc *p, unsigned int ring_size) 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++; } } @@ -285,19 +284,16 @@ static void enh_desc_release_tx_desc(struct dma_desc *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; } diff --git a/drivers/net/ethernet/stmicro/stmmac/norm_desc.c b/drivers/net/ethernet/stmicro/stmmac/norm_desc.c index e13226b80d47..f7e8ba7f501a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/norm_desc.c +++ b/drivers/net/ethernet/stmicro/stmmac/norm_desc.c @@ -23,6 +23,7 @@ *******************************************************************************/ #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) @@ -126,9 +127,9 @@ static void ndesc_init_rx_desc(struct dma_desc *p, unsigned int ring_size, 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++; @@ -140,8 +141,7 @@ static void ndesc_init_tx_desc(struct dma_desc *p, unsigned int ring_size) 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++; } } @@ -176,20 +176,14 @@ static void ndesc_release_tx_desc(struct dma_desc *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) diff --git a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c new file mode 100644 index 000000000000..fb8377da1687 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c @@ -0,0 +1,126 @@ +/******************************************************************************* + 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, +}; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 49a4af3ce3a8..9bafa6cf9e8b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -22,7 +22,7 @@ #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" diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index bf895cb75785..5eccd996cde0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2,7 +2,7 @@ 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, @@ -41,17 +41,16 @@ #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" @@ -388,11 +387,28 @@ static void display_ring(struct dma_desc *p, int size) } } +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) { @@ -401,31 +417,24 @@ 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); @@ -453,7 +462,7 @@ static void init_dma_desc_rings(struct net_device *dev) 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); @@ -475,8 +484,9 @@ static void init_dma_desc_rings(struct net_device *dev) 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]); } @@ -490,6 +500,12 @@ static void init_dma_desc_rings(struct net_device *dev) 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; @@ -620,8 +636,7 @@ static void stmmac_tx(struct stmmac_priv *priv) 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)) { /* @@ -728,7 +743,6 @@ static void stmmac_no_timer_stopped(void) */ static void stmmac_tx_err(struct stmmac_priv *priv) { - netif_stop_queue(priv->dev); priv->hw->dma->stop_tx(priv->ioaddr); @@ -1028,47 +1042,6 @@ static int stmmac_release(struct net_device *dev) 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 @@ -1083,6 +1056,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) 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)) { @@ -1103,7 +1077,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *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 @@ -1116,14 +1090,14 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) 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, @@ -1214,11 +1188,10 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv) 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(); @@ -1795,6 +1768,7 @@ static int stmmac_mac_device_setup(struct net_device *dev) 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 */ |