iwlwifi: revamp tx scheduler byte count tables handling

This moves byte count tables to tx domain removing completely
ambivalent shared data. Changes handling of allocation
byte count tables and keep warm consistent memory
Moves general tx scheduler definitions from iwl-4956-hw.h
to iwl-fh.h

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 88 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-hw.h b/drivers/net/wireless/iwlwifi/iwl-4965-hw.h
index 94ae1a84f786..fb0fd773960f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-hw.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-hw.h
@@ -819,64 +819,6 @@ enum {
 #define IWL49_NUM_QUEUES	16
 #define IWL49_NUM_AMPDU_QUEUES	8
 
-#define IWL_TX_DMA_MASK        (DMA_BIT_MASK(36) & ~0x3)
-#define IWL_NUM_OF_TBS		20
-
-static inline u8 iwl_get_dma_hi_addr(dma_addr_t addr)
-{
-	return (sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0) & 0xF;
-}
-/**
- * struct iwl_tfd_tb transmit buffer descriptor within transmit frame descriptor
- *
- * This structure contains dma address and length of transmission address
- *
- * @lo: low [31:0] portion of the dma address of TX buffer
- * 	every even is unaligned on 16 bit boundary
- * @hi_n_len 0-3 [35:32] portion of dma
- *	     4-16 length of the tx buffer
- */
-struct iwl_tfd_tb {
-	__le32 lo;
-	__le16 hi_n_len;
-} __attribute__((packed));
-
-/**
- * struct iwl_tfd
- *
- * Transmit Frame Descriptor (TFD)
- *
- * @ __reserved1[3] reserved
- * @ num_tbs 0-5 number of active tbs
- * 	     6-7 padding (not used)
- * @ tbs[20]	transmit frame buffer descriptors
- * @ __pad 	padding
- *
- * Each Tx queue uses a circular buffer of 256 TFDs stored in host DRAM.
- * Both driver and device share these circular buffers, each of which must be
- * contiguous 256 TFDs x 128 bytes-per-TFD = 32 KBytes
- *
- * Driver must indicate the physical address of the base of each
- * circular buffer via the FH_MEM_CBBC_QUEUE registers.
- *
- * Each TFD contains pointer/size information for up to 20 data buffers
- * in host DRAM.  These buffers collectively contain the (one) frame described
- * by the TFD.  Each buffer must be a single contiguous block of memory within
- * itself, but buffers may be scattered in host DRAM.  Each buffer has max size
- * of (4K - 4).  The concatenates all of a TFD's buffers into a single
- * Tx frame, up to 8 KBytes in size.
- *
- * A maximum of 255 (not 256!) TFDs may be on a queue waiting for Tx.
- *
- * Bit fields in the control dword (val0):
- */
-struct iwl_tfd {
-	u8 __reserved1[3];
-	u8 num_tbs;
-	struct iwl_tfd_tb tbs[IWL_NUM_OF_TBS];
-	__le32 __pad;
-} __attribute__ ((packed));
-
 
 /**
  * struct iwl4965_schedq_bc_tbl
@@ -896,37 +838,9 @@ struct iwl_tfd {
  * padding puts each byte count table on a 1024-byte boundary;
  * 4965 assumes tables are separated by 1024 bytes.
  */
-struct iwl4965_schedq_bc_tbl {
+struct iwl4965_scd_bc_tbl {
 	__le16 tfd_offset[TFD_QUEUE_BC_SIZE];
 	u8 pad[1024 - (TFD_QUEUE_BC_SIZE) * sizeof(__le16)];
 } __attribute__ ((packed));
 
-
-/**
- * struct iwl4965_shared - handshake area for Tx and Rx
- *
- * For convenience in allocating memory, this structure combines 2 areas of
- * DRAM which must be shared between driver and 4965.  These do not need to
- * be combined, if better allocation would result from keeping them separate:
- *
- * 1)  The Tx byte count tables occupy 1024 bytes each (16 KBytes total for
- *     16 queues).  Driver uses SCD_DRAM_BASE_ADDR to tell 4965 where to find
- *     the first of these tables.  4965 assumes tables are 1024 bytes apart.
- *
- * 2)  The Rx status (val0 and val1) occupies only 8 bytes.  Driver uses
- *     FH_RSCSR_CHNL0_STTS_WPTR_REG to tell 4965 where to find this area.
- *     Driver reads val0 to determine the latest Receive Buffer Descriptor (RBD)
- *     that has been filled by the 4965.
- *
- * Bit fields val0:
- * 31-12:  Not used
- * 11- 0:  Index of last filled Rx buffer descriptor (4965 writes, driver reads)
- *
- * Bit fields val1:
- * 31- 0:  Not used
- */
-struct iwl4965_shared {
-	struct iwl4965_schedq_bc_tbl queues_bc_tbls[IWL49_NUM_QUEUES];
-} __attribute__ ((packed));
-
-#endif /* __iwl4965_4965_hw_h__ */
+#endif /* !__iwl_4965_hw_h__ */