1096d63d8e
Enable ibmveth for Cooperative Memory Overcommitment (CMO). For this driver it means calculating a desired amount of IO memory based on the current MTU and updating this value with the bus when MTU changes occur. Because DMA mappings can fail, we have added a bounce buffer for temporary cases where the driver can not map IO memory for the buffer pool. The following changes are made to enable the driver for CMO: * DMA mapping errors will not result in error messages if entitlement has been exceeded and resources were not available. * DMA mapping errors are handled gracefully, ibmveth_replenish_buffer_pool() is corrected to check the return from dma_map_single and fail gracefully. * The driver will have a get_desired_dma function defined to function in a CMO environment. * When the MTU is changed, the driver will update the device IO entitlement Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Santiago Leon <santil@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
193 lines
6.6 KiB
C
193 lines
6.6 KiB
C
/**************************************************************************/
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/* */
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/* IBM eServer i/[Series Virtual Ethernet Device Driver */
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/* Copyright (C) 2003 IBM Corp. */
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/* Dave Larson (larson1@us.ibm.com) */
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/* Santiago Leon (santil@us.ibm.com) */
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/* */
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/* This program is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU General Public License as published by */
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/* the Free Software Foundation; either version 2 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public License */
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/* along with this program; if not, write to the Free Software */
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/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
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/* USA */
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/* */
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/**************************************************************************/
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#ifndef _IBMVETH_H
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#define _IBMVETH_H
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/* constants for H_MULTICAST_CTRL */
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#define IbmVethMcastReceptionModifyBit 0x80000UL
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#define IbmVethMcastReceptionEnableBit 0x20000UL
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#define IbmVethMcastFilterModifyBit 0x40000UL
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#define IbmVethMcastFilterEnableBit 0x10000UL
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#define IbmVethMcastEnableRecv (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
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#define IbmVethMcastDisableRecv (IbmVethMcastReceptionModifyBit)
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#define IbmVethMcastEnableFiltering (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
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#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
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#define IbmVethMcastAddFilter 0x1UL
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#define IbmVethMcastRemoveFilter 0x2UL
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#define IbmVethMcastClearFilterTable 0x3UL
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#define IBMVETH_ILLAN_PADDED_PKT_CSUM 0x0000000000002000ULL
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#define IBMVETH_ILLAN_TRUNK_PRI_MASK 0x0000000000000F00ULL
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#define IBMVETH_ILLAN_IPV6_TCP_CSUM 0x0000000000000004ULL
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#define IBMVETH_ILLAN_IPV4_TCP_CSUM 0x0000000000000002ULL
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#define IBMVETH_ILLAN_ACTIVE_TRUNK 0x0000000000000001ULL
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/* hcall macros */
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#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
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plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
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#define h_free_logical_lan(ua) \
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plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
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#define h_add_logical_lan_buffer(ua, buf) \
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plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
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static inline long h_send_logical_lan(unsigned long unit_address,
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unsigned long desc1, unsigned long desc2, unsigned long desc3,
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unsigned long desc4, unsigned long desc5, unsigned long desc6,
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unsigned long corellator_in, unsigned long *corellator_out)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
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rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
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desc2, desc3, desc4, desc5, desc6, corellator_in);
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*corellator_out = retbuf[0];
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return rc;
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}
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static inline long h_illan_attributes(unsigned long unit_address,
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unsigned long reset_mask, unsigned long set_mask,
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unsigned long *ret_attributes)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
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reset_mask, set_mask);
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*ret_attributes = retbuf[0];
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return rc;
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}
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#define h_multicast_ctrl(ua, cmd, mac) \
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plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
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#define h_change_logical_lan_mac(ua, mac) \
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plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
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#define IbmVethNumBufferPools 5
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#define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
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#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
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#define IBMVETH_MAX_MTU 68
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#define IBMVETH_MAX_POOL_COUNT 4096
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#define IBMVETH_BUFF_LIST_SIZE 4096
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#define IBMVETH_FILT_LIST_SIZE 4096
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#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
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static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
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static int pool_count[] = { 256, 768, 256, 256, 256 };
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static int pool_active[] = { 1, 1, 0, 0, 0};
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#define IBM_VETH_INVALID_MAP ((u16)0xffff)
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struct ibmveth_buff_pool {
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u32 size;
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u32 index;
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u32 buff_size;
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u32 threshold;
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atomic_t available;
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u32 consumer_index;
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u32 producer_index;
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u16 *free_map;
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dma_addr_t *dma_addr;
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struct sk_buff **skbuff;
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int active;
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struct kobject kobj;
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};
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struct ibmveth_rx_q {
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u64 index;
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u64 num_slots;
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u64 toggle;
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dma_addr_t queue_dma;
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u32 queue_len;
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struct ibmveth_rx_q_entry *queue_addr;
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};
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struct ibmveth_adapter {
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struct vio_dev *vdev;
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struct net_device *netdev;
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struct napi_struct napi;
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struct net_device_stats stats;
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unsigned int mcastFilterSize;
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unsigned long mac_addr;
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void * buffer_list_addr;
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void * filter_list_addr;
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dma_addr_t buffer_list_dma;
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dma_addr_t filter_list_dma;
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struct ibmveth_buff_pool rx_buff_pool[IbmVethNumBufferPools];
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struct ibmveth_rx_q rx_queue;
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int pool_config;
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int rx_csum;
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void *bounce_buffer;
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dma_addr_t bounce_buffer_dma;
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/* adapter specific stats */
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u64 replenish_task_cycles;
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u64 replenish_no_mem;
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u64 replenish_add_buff_failure;
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u64 replenish_add_buff_success;
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u64 rx_invalid_buffer;
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u64 rx_no_buffer;
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u64 tx_map_failed;
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u64 tx_send_failed;
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spinlock_t stats_lock;
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};
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struct ibmveth_buf_desc_fields {
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u32 flags_len;
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#define IBMVETH_BUF_VALID 0x80000000
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#define IBMVETH_BUF_TOGGLE 0x40000000
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#define IBMVETH_BUF_NO_CSUM 0x02000000
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#define IBMVETH_BUF_CSUM_GOOD 0x01000000
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#define IBMVETH_BUF_LEN_MASK 0x00FFFFFF
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u32 address;
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};
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union ibmveth_buf_desc {
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u64 desc;
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struct ibmveth_buf_desc_fields fields;
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};
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struct ibmveth_rx_q_entry {
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u32 flags_off;
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#define IBMVETH_RXQ_TOGGLE 0x80000000
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#define IBMVETH_RXQ_TOGGLE_SHIFT 31
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#define IBMVETH_RXQ_VALID 0x40000000
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#define IBMVETH_RXQ_NO_CSUM 0x02000000
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#define IBMVETH_RXQ_CSUM_GOOD 0x01000000
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#define IBMVETH_RXQ_OFF_MASK 0x0000FFFF
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u32 length;
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u64 correlator;
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};
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#endif /* _IBMVETH_H */
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