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26d535aedc
As a preperation for multiple RX queues change the RBD allocation model. The new model includes a background allocator. The allocator is called by the interrupt handler when there are two released buffers by the queue, and the allocator starts allocating eight pages per request. When the queue has released 8 pages it tries claiming the request. If the pages are not ready - it keeps claiming. This new model should make sure that RBDs are always available across the multiple queues. The RBDs are transferred between the allocator and the queue. The queue moves the free RBDs upon freeing them to the allocator. The allocator moves them back to the queue's possession when the request is claimed. The allocator has an initial pool to make sure there are always RBDs available for the request completion. Release of the buffers at exit is done per pools - the allocator frees its own initial pool and the queue frees its own pool. Existing code refactor - -Queue's initial pool is the size of the queue only as the allocation of the new buffers no longer uses this pool. -Removal of replenish background work, and replenish calls in the interrupt handler and restock(). -The replenish() and the rxq used_list are used only during initialization. -Moved page allocation to a new function for code reuse. New code - Allocator code - new structure and functions. Interrupt handler uses the allocator functions for replenishing buffers. Reuse of the restock() method. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
536 lines
22 KiB
C
536 lines
22 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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#ifndef __iwl_fh_h__
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#define __iwl_fh_h__
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#include <linux/types.h>
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/****************************/
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/* Flow Handler Definitions */
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/****************************/
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/**
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* This I/O area is directly read/writable by driver (e.g. Linux uses writel())
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* Addresses are offsets from device's PCI hardware base address.
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*/
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#define FH_MEM_LOWER_BOUND (0x1000)
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#define FH_MEM_UPPER_BOUND (0x2000)
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/**
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* Keep-Warm (KW) buffer base address.
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*
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* Driver must allocate a 4KByte buffer that is for keeping the
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* host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
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* DRAM access when doing Txing or Rxing. The dummy accesses prevent host
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* from going into a power-savings mode that would cause higher DRAM latency,
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* and possible data over/under-runs, before all Tx/Rx is complete.
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*
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* Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
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* of the buffer, which must be 4K aligned. Once this is set up, the device
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* automatically invokes keep-warm accesses when normal accesses might not
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* be sufficient to maintain fast DRAM response.
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*
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* Bit fields:
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* 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned
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*/
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#define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C)
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/**
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* TFD Circular Buffers Base (CBBC) addresses
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*
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* Device has 16 base pointer registers, one for each of 16 host-DRAM-resident
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* circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
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* (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04
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* bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
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* aligned (address bits 0-7 must be 0).
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* Later devices have 20 (5000 series) or 30 (higher) queues, but the registers
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* for them are in different places.
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*
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* Bit fields in each pointer register:
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* 27-0: TFD CB physical base address [35:8], must be 256-byte aligned
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*/
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#define FH_MEM_CBBC_0_15_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
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#define FH_MEM_CBBC_0_15_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10)
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#define FH_MEM_CBBC_16_19_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBF0)
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#define FH_MEM_CBBC_16_19_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
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#define FH_MEM_CBBC_20_31_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xB20)
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#define FH_MEM_CBBC_20_31_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xB80)
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/* Find TFD CB base pointer for given queue */
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static inline unsigned int FH_MEM_CBBC_QUEUE(unsigned int chnl)
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{
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if (chnl < 16)
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return FH_MEM_CBBC_0_15_LOWER_BOUND + 4 * chnl;
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if (chnl < 20)
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return FH_MEM_CBBC_16_19_LOWER_BOUND + 4 * (chnl - 16);
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WARN_ON_ONCE(chnl >= 32);
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return FH_MEM_CBBC_20_31_LOWER_BOUND + 4 * (chnl - 20);
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}
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/**
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* Rx SRAM Control and Status Registers (RSCSR)
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*
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* These registers provide handshake between driver and device for the Rx queue
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* (this queue handles *all* command responses, notifications, Rx data, etc.
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* sent from uCode to host driver). Unlike Tx, there is only one Rx
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* queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can
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* concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
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* Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
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* mapping between RBDs and RBs.
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*
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* Driver must allocate host DRAM memory for the following, and set the
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* physical address of each into device registers:
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*
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* 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
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* entries (although any power of 2, up to 4096, is selectable by driver).
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* Each entry (1 dword) points to a receive buffer (RB) of consistent size
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* (typically 4K, although 8K or 16K are also selectable by driver).
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* Driver sets up RB size and number of RBDs in the CB via Rx config
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* register FH_MEM_RCSR_CHNL0_CONFIG_REG.
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*
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* Bit fields within one RBD:
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* 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned
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*
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* Driver sets physical address [35:8] of base of RBD circular buffer
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* into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
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*
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* 2) Rx status buffer, 8 bytes, in which uCode indicates which Rx Buffers
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* (RBs) have been filled, via a "write pointer", actually the index of
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* the RB's corresponding RBD within the circular buffer. Driver sets
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* physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
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*
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* Bit fields in lower dword of Rx status buffer (upper dword not used
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* by driver:
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* 31-12: Not used by driver
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* 11- 0: Index of last filled Rx buffer descriptor
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* (device writes, driver reads this value)
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*
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* As the driver prepares Receive Buffers (RBs) for device to fill, driver must
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* enter pointers to these RBs into contiguous RBD circular buffer entries,
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* and update the device's "write" index register,
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* FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
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*
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* This "write" index corresponds to the *next* RBD that the driver will make
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* available, i.e. one RBD past the tail of the ready-to-fill RBDs within
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* the circular buffer. This value should initially be 0 (before preparing any
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* RBs), should be 8 after preparing the first 8 RBs (for example), and must
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* wrap back to 0 at the end of the circular buffer (but don't wrap before
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* "read" index has advanced past 1! See below).
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* NOTE: DEVICE EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
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*
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* As the device fills RBs (referenced from contiguous RBDs within the circular
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* buffer), it updates the Rx status buffer in host DRAM, 2) described above,
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* to tell the driver the index of the latest filled RBD. The driver must
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* read this "read" index from DRAM after receiving an Rx interrupt from device
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*
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* The driver must also internally keep track of a third index, which is the
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* next RBD to process. When receiving an Rx interrupt, driver should process
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* all filled but unprocessed RBs up to, but not including, the RB
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* corresponding to the "read" index. For example, if "read" index becomes "1",
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* driver may process the RB pointed to by RBD 0. Depending on volume of
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* traffic, there may be many RBs to process.
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*
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* If read index == write index, device thinks there is no room to put new data.
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* Due to this, the maximum number of filled RBs is 255, instead of 256. To
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* be safe, make sure that there is a gap of at least 2 RBDs between "write"
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* and "read" indexes; that is, make sure that there are no more than 254
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* buffers waiting to be filled.
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*/
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#define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0)
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#define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
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#define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND)
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/**
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* Physical base address of 8-byte Rx Status buffer.
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* Bit fields:
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* 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
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*/
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#define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0)
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/**
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* Physical base address of Rx Buffer Descriptor Circular Buffer.
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* Bit fields:
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* 27-0: RBD CD physical base address [35:8], must be 256-byte aligned.
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*/
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#define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004)
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/**
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* Rx write pointer (index, really!).
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* Bit fields:
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* 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1.
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* NOTE: For 256-entry circular buffer, use only bits [7:0].
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*/
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#define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008)
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#define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
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#define FW_RSCSR_CHNL0_RXDCB_RDPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x00c)
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#define FH_RSCSR_CHNL0_RDPTR FW_RSCSR_CHNL0_RXDCB_RDPTR_REG
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/**
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* Rx Config/Status Registers (RCSR)
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* Rx Config Reg for channel 0 (only channel used)
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*
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* Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
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* normal operation (see bit fields).
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*
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* Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
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* Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
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* FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
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*
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* Bit fields:
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* 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
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* '10' operate normally
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* 29-24: reserved
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* 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
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* min "5" for 32 RBDs, max "12" for 4096 RBDs.
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* 19-18: reserved
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* 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
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* '10' 12K, '11' 16K.
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* 15-14: reserved
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* 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
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* 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
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* typical value 0x10 (about 1/2 msec)
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* 3- 0: reserved
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*/
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#define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
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#define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0)
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#define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND)
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#define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0)
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#define FH_MEM_RCSR_CHNL0_RBDCB_WPTR (FH_MEM_RCSR_CHNL0 + 0x8)
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#define FH_MEM_RCSR_CHNL0_FLUSH_RB_REQ (FH_MEM_RCSR_CHNL0 + 0x10)
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#define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */
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#define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */
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#define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */
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#define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */
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#define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/
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#define FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS (20)
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#define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS (4)
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#define RX_RB_TIMEOUT (0x11)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000)
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#define FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY (0x00000004)
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000)
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000)
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/**
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* Rx Shared Status Registers (RSSR)
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*
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* After stopping Rx DMA channel (writing 0 to
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* FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
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* FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
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*
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* Bit fields:
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* 24: 1 = Channel 0 is idle
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*
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* FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
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* contain default values that should not be altered by the driver.
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*/
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#define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40)
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#define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
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#define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND)
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#define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004)
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#define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
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(FH_MEM_RSSR_LOWER_BOUND + 0x008)
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#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000)
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#define FH_MEM_TFDIB_REG1_ADDR_BITSHIFT 28
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#define FH_MEM_TB_MAX_LENGTH (0x00020000)
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/* TFDB Area - TFDs buffer table */
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#define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF)
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#define FH_TFDIB_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x900)
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#define FH_TFDIB_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x958)
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#define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
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#define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)
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/**
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* Transmit DMA Channel Control/Status Registers (TCSR)
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*
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* Device has one configuration register for each of 8 Tx DMA/FIFO channels
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* supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
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* which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
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*
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* To use a Tx DMA channel, driver must initialize its
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* FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
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*
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* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
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* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
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*
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* All other bits should be 0.
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*
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* Bit fields:
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* 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
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* '10' operate normally
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* 29- 4: Reserved, set to "0"
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* 3: Enable internal DMA requests (1, normal operation), disable (0)
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* 2- 0: Reserved, set to "0"
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*/
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#define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
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#define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60)
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/* Find Control/Status reg for given Tx DMA/FIFO channel */
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#define FH_TCSR_CHNL_NUM (8)
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/* TCSR: tx_config register values */
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#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl))
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#define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8)
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#define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV (0x00000001)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE (0x00000008)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD (0x00400000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD (0x00800000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12)
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/**
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* Tx Shared Status Registers (TSSR)
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*
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* After stopping Tx DMA channel (writing 0 to
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* FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
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* FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
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* (channel's buffers empty | no pending requests).
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*
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* Bit fields:
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* 31-24: 1 = Channel buffers empty (channel 7:0)
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* 23-16: 1 = No pending requests (channel 7:0)
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*/
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#define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0)
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#define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0)
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#define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010)
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/**
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* Bit fields for TSSR(Tx Shared Status & Control) error status register:
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* 31: Indicates an address error when accessed to internal memory
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* uCode/driver must write "1" in order to clear this flag
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* 30: Indicates that Host did not send the expected number of dwords to FH
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* uCode/driver must write "1" in order to clear this flag
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* 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA
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* command was received from the scheduler while the TRB was already full
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* with previous command
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* uCode/driver must write "1" in order to clear this flag
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* 7-0: Each status bit indicates a channel's TxCredit error. When an error
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* bit is set, it indicates that the FH has received a full indication
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* from the RTC TxFIFO and the current value of the TxCredit counter was
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* not equal to zero. This mean that the credit mechanism was not
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* synchronized to the TxFIFO status
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* uCode/driver must write "1" in order to clear this flag
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*/
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#define FH_TSSR_TX_ERROR_REG (FH_TSSR_LOWER_BOUND + 0x018)
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#define FH_TSSR_TX_MSG_CONFIG_REG (FH_TSSR_LOWER_BOUND + 0x008)
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#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16)
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/* Tx service channels */
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#define FH_SRVC_CHNL (9)
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#define FH_SRVC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9C8)
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#define FH_SRVC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
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#define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
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(FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
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#define FH_TX_CHICKEN_BITS_REG (FH_MEM_LOWER_BOUND + 0xE98)
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#define FH_TX_TRB_REG(_chan) (FH_MEM_LOWER_BOUND + 0x958 + (_chan) * 4)
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/* Instruct FH to increment the retry count of a packet when
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* it is brought from the memory to TX-FIFO
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*/
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#define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002)
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#define RX_QUEUE_SIZE 256
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#define RX_QUEUE_MASK 255
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#define RX_QUEUE_SIZE_LOG 8
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/**
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* struct iwl_rb_status - reserve buffer status
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* host memory mapped FH registers
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* @closed_rb_num [0:11] - Indicates the index of the RB which was closed
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* @closed_fr_num [0:11] - Indicates the index of the RX Frame which was closed
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* @finished_rb_num [0:11] - Indicates the index of the current RB
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* in which the last frame was written to
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* @finished_fr_num [0:11] - Indicates the index of the RX Frame
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* which was transferred
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*/
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struct iwl_rb_status {
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__le16 closed_rb_num;
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__le16 closed_fr_num;
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__le16 finished_rb_num;
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__le16 finished_fr_nam;
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__le32 __unused;
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} __packed;
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#define TFD_QUEUE_SIZE_MAX (256)
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#define TFD_QUEUE_SIZE_BC_DUP (64)
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#define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP)
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#define IWL_TX_DMA_MASK DMA_BIT_MASK(36)
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#define IWL_NUM_OF_TBS 20
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static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
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{
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return (sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0) & 0xF;
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}
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/**
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* struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
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*
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* This structure contains dma address and length of transmission address
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*
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* @lo: low [31:0] portion of the dma address of TX buffer
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* every even is unaligned on 16 bit boundary
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* @hi_n_len 0-3 [35:32] portion of dma
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* 4-15 length of the tx buffer
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*/
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struct iwl_tfd_tb {
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__le32 lo;
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__le16 hi_n_len;
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} __packed;
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/**
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* struct iwl_tfd
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*
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* Transmit Frame Descriptor (TFD)
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*
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* @ __reserved1[3] reserved
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* @ num_tbs 0-4 number of active tbs
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* 5 reserved
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* 6-7 padding (not used)
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* @ tbs[20] transmit frame buffer descriptors
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* @ __pad padding
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*
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* Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM.
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* Both driver and device share these circular buffers, each of which must be
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* contiguous 256 TFDs x 128 bytes-per-TFD = 32 KBytes
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*
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* Driver must indicate the physical address of the base of each
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* circular buffer via the FH_MEM_CBBC_QUEUE registers.
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*
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* Each TFD contains pointer/size information for up to 20 data buffers
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* in host DRAM. These buffers collectively contain the (one) frame described
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* by the TFD. Each buffer must be a single contiguous block of memory within
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* itself, but buffers may be scattered in host DRAM. Each buffer has max size
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* of (4K - 4). The concatenates all of a TFD's buffers into a single
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* Tx frame, up to 8 KBytes in size.
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*
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* A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx.
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*/
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struct iwl_tfd {
|
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u8 __reserved1[3];
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u8 num_tbs;
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struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS];
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__le32 __pad;
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} __packed;
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/* Keep Warm Size */
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#define IWL_KW_SIZE 0x1000 /* 4k */
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|
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/* Fixed (non-configurable) rx data from phy */
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/**
|
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* struct iwlagn_schedq_bc_tbl scheduler byte count table
|
|
* base physical address provided by SCD_DRAM_BASE_ADDR
|
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* @tfd_offset 0-12 - tx command byte count
|
|
* 12-16 - station index
|
|
*/
|
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struct iwlagn_scd_bc_tbl {
|
|
__le16 tfd_offset[TFD_QUEUE_BC_SIZE];
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} __packed;
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#endif /* !__iwl_fh_h__ */
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