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| author | Matti Gottlieb <matti.gottlieb@intel.com> | 2015-07-19 11:15:07 +0300 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-08-04 21:30:15 +0300 |
| commit | e112018776a88b1e9c31fff3c6a9341c4f37c358 (patch) | |
| tree | 3e027200f6c7b684d74685ae30ba7da6a7f0ef78 /drivers/net/wireless/iwlwifi/iwl-csr.h | |
| parent | 26d535aedc0e9fcf2c8bee65b33cecb58ee8e8ed (diff) | |
| download | linux-e112018776a88b1e9c31fff3c6a9341c4f37c358.tar.xz | |
iwlwifi: mvm: Add FW paging mechanism for the UMAC on SDIO
Family 8000 products has 2 embedded processors, the first
known as LMAC (lower MAC) and implements the functionality from
previous products, the second one is known as UMAC (upper MAC)
and is used mainly for driver offloads as well as new features.
The UMAC is typically “less” real-time than the LMAC and is used
for higher level controls.
The UMAC's code/data size is estimated to be in the mega-byte arena,
taking into account the code it needs to replace in the driver and
the set of new features.
In order to allow the UMAC to execute code that is bigger than its code
memory, we allow the UMAC embedded processor to page out code pages on
DRAM.
When the device is slave on the bus(SDIO) the driver saves the UMAC's
image pages in blocks of 32K in the DRAM and sends the layout of the
pages to the FW. When the FW wants load / unload pages, it creates an
interrupt, and the driver uploads / downloads the page to an address in
the a specific address on the device's memory.
The driver can support up to 1 MB of pages.
Add paging mechanism for the UMAC on SDIO in order to allow the program to
use a larger virtual space while using less physical memory on the device
itself.
Signed-off-by: Matti Gottlieb <matti.gottlieb@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-csr.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-csr.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-csr.h b/drivers/net/wireless/iwlwifi/iwl-csr.h index fa716618735e..543abeaffcf0 100644 --- a/drivers/net/wireless/iwlwifi/iwl-csr.h +++ b/drivers/net/wireless/iwlwifi/iwl-csr.h @@ -200,6 +200,7 @@ #define CSR_INT_BIT_FH_TX (1 << 27) /* Tx DMA FH_INT[1:0] */ #define CSR_INT_BIT_SCD (1 << 26) /* TXQ pointer advanced */ #define CSR_INT_BIT_SW_ERR (1 << 25) /* uCode error */ +#define CSR_INT_BIT_PAGING (1 << 24) /* SDIO PAGING */ #define CSR_INT_BIT_RF_KILL (1 << 7) /* HW RFKILL switch GP_CNTRL[27] toggled */ #define CSR_INT_BIT_CT_KILL (1 << 6) /* Critical temp (chip too hot) rfkill */ #define CSR_INT_BIT_SW_RX (1 << 3) /* Rx, command responses */ @@ -210,6 +211,7 @@ CSR_INT_BIT_HW_ERR | \ CSR_INT_BIT_FH_TX | \ CSR_INT_BIT_SW_ERR | \ + CSR_INT_BIT_PAGING | \ CSR_INT_BIT_RF_KILL | \ CSR_INT_BIT_SW_RX | \ CSR_INT_BIT_WAKEUP | \ |