| /* Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above |
| copyright notice, this list of conditions and the following |
| disclaimer in the documentation and/or other materials provided |
| with the distribution. |
| * Neither the name of The Linux Foundation nor the names of its |
| contributors may be used to endorse or promote products derived |
| from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /*=========================================================================== |
| INCLUDE FILES |
| ===========================================================================*/ |
| #include "glink.h" |
| #include "glink_core_if.h" |
| #include "glink_transport_if.h" |
| #include "glink_vector.h" |
| #include "glink_os_utils.h" |
| |
| /*=========================================================================== |
| LOCAL DATA DECLARATIONS |
| ===========================================================================*/ |
| |
| |
| /*=========================================================================== |
| PRIVATE FUNCTIONS |
| ===========================================================================*/ |
| |
| /*=========================================================================== |
| FUNCTION glink_dummy_tx_vprovider |
| ===========================================================================*/ |
| /** |
| |
| Buffer provider for virtual space that operates on a non-vectored buffer. |
| |
| @param[in] iovec Pointer to the dummy vector. |
| @param[in] offset Offset within the dummy vector. |
| @param[out] size Size of the provied buffer. |
| |
| @return virtual address of the buffer. |
| |
| @sideeffects None. |
| */ |
| /*=========================================================================*/ |
| void* glink_dummy_tx_vprovider |
| ( |
| void* iovec, |
| size_t offset, |
| size_t *size |
| ) |
| { |
| glink_core_tx_pkt_type* pkt = (glink_core_tx_pkt_type*)iovec; |
| |
| if (pkt == NULL || size == NULL || pkt->size <= offset) |
| { |
| return NULL; |
| } |
| |
| *size = pkt->size - offset; |
| |
| return (char*)(pkt->data) + offset; |
| } |
| |
| /*=========================================================================== |
| FUNCTION glink_iovec_vprovider |
| ===========================================================================*/ |
| /** |
| |
| Buffer provider for virtual space that operates on a Glink iovec. |
| |
| @param[in] iovec Pointer to the dummy vector. |
| @param[in] offset Offset within the dummy vector. |
| @param[out] size Size of the provied buffer. |
| |
| @return virtual address of the buffer. |
| |
| @sideeffects None. |
| */ |
| /*=========================================================================*/ |
| void* glink_iovec_vprovider |
| ( |
| void* iovec, |
| size_t offset, |
| size_t *size |
| ) |
| { |
| glink_iovector_type* iovec_l = (glink_iovector_type*)iovec; |
| |
| if (iovec_l == NULL || size == NULL) |
| { |
| return NULL; |
| } |
| |
| if (!iovec_l->vlast || iovec_l->vlast->start_offset > offset) |
| { |
| iovec_l->vlast = iovec_l->vlist; |
| } |
| |
| while (iovec_l->vlast && |
| iovec_l->vlast->start_offset + iovec_l->vlast->size <= offset) |
| { |
| iovec_l->vlast = iovec_l->vlast->next; |
| } |
| |
| if (iovec_l->vlast == NULL) |
| { |
| return NULL; |
| } |
| |
| offset -= iovec_l->vlast->start_offset; |
| *size = iovec_l->vlast->size - offset; |
| |
| return (char*)(iovec_l->vlast->data) + offset; |
| } |
| |
| /*=========================================================================== |
| FUNCTION glink_iovec_pprovider |
| ===========================================================================*/ |
| /** |
| |
| Buffer provider for physical space that operates on a Glink iovec. |
| |
| @param[in] iovec Pointer to the dummy vector. |
| @param[in] offset Offset within the dummy vector. |
| @param[out] size Size of the provied buffer. |
| |
| @return physical address of the buffer. |
| |
| @sideeffects None. |
| */ |
| /*=========================================================================*/ |
| void* glink_iovec_pprovider |
| ( |
| void* iovec, |
| size_t offset, |
| size_t *size |
| ) |
| { |
| glink_iovector_type* iovec_l = (glink_iovector_type*)iovec; |
| |
| if (iovec_l == NULL || size == NULL) |
| { |
| return NULL; |
| } |
| |
| if (!iovec_l->plast || iovec_l->plast->start_offset > offset) |
| { |
| iovec_l->plast = iovec_l->plist; |
| } |
| |
| while (iovec_l->plast && |
| iovec_l->plast->start_offset + iovec_l->plast->size <= offset) |
| { |
| iovec_l->plast = iovec_l->plast->next; |
| } |
| |
| if (iovec_l->plast == NULL) |
| { |
| return NULL; |
| } |
| |
| offset -= iovec_l->plast->start_offset; |
| *size = iovec_l->plast->size - offset; |
| |
| return (char*)(iovec_l->plast->data) + offset; |
| } |