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iwlwifi: add IO function for continuous write of target memory
Add new IO function _iwl_write_targ_mem_words() to support target memory write for a continuous area. It will return error code -EBUSY if iwl_grab_nic_access() fails to indicate the memory write does not be performed. Meanwhile the existing function iwl_write_targ_mem() also been updated by using _iwl_write_targ_mem_words() in a single word case. Signed-off-by: Kenny Hsu <kenny.hsu@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
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parent
7a0b3b08df
commit
ee8ba8800b
2 changed files with 20 additions and 4 deletions
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@ -283,16 +283,29 @@ u32 iwl_read_targ_mem(struct iwl_bus *bus, u32 addr)
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return value;
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}
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void iwl_write_targ_mem(struct iwl_bus *bus, u32 addr, u32 val)
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int _iwl_write_targ_mem_words(struct iwl_bus *bus, u32 addr,
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void *buf, int words)
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{
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unsigned long flags;
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int offs, result = 0;
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u32 *vals = buf;
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spin_lock_irqsave(&bus->reg_lock, flags);
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if (!iwl_grab_nic_access(bus)) {
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iwl_write32(bus, HBUS_TARG_MEM_WADDR, addr);
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wmb();
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iwl_write32(bus, HBUS_TARG_MEM_WDAT, val);
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for (offs = 0; offs < words; offs++)
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iwl_write32(bus, HBUS_TARG_MEM_WDAT, vals[offs]);
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iwl_release_nic_access(bus);
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}
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} else
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result = -EBUSY;
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spin_unlock_irqrestore(&bus->reg_lock, flags);
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return result;
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}
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int iwl_write_targ_mem(struct iwl_bus *bus, u32 addr, u32 val)
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{
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return _iwl_write_targ_mem_words(bus, addr, &val, 1);
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}
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@ -85,6 +85,9 @@ void _iwl_read_targ_mem_words(struct iwl_bus *bus, u32 addr,
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(bufsize) / sizeof(u32));\
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} while (0)
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int _iwl_write_targ_mem_words(struct iwl_bus *bus, u32 addr,
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void *buf, int words);
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u32 iwl_read_targ_mem(struct iwl_bus *bus, u32 addr);
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void iwl_write_targ_mem(struct iwl_bus *bus, u32 addr, u32 val);
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int iwl_write_targ_mem(struct iwl_bus *bus, u32 addr, u32 val);
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#endif
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