diff options
| -rw-r--r-- | arch/arm/mach-davinci/dma.c | 65 |
1 files changed, 33 insertions, 32 deletions
diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c index b097592a862e..4ff1f939e07b 100644 --- a/arch/arm/mach-davinci/dma.c +++ b/arch/arm/mach-davinci/dma.c @@ -509,21 +509,21 @@ static irqreturn_t dma_tc1err_handler(int irq, void *data) return IRQ_HANDLED; } -static int reserve_contiguous_params(int ctlr, unsigned int id, - unsigned int num_params, - unsigned int start_param) +static int reserve_contiguous_slots(int ctlr, unsigned int id, + unsigned int num_slots, + unsigned int start_slot) { int i, j; - unsigned int count = num_params; - int stop_param = start_param; + unsigned int count = num_slots; + int stop_slot = start_slot; DECLARE_BITMAP(tmp_inuse, EDMA_MAX_PARAMENTRY); - for (i = start_param; i < edma_info[ctlr]->num_slots; ++i) { + for (i = start_slot; i < edma_info[ctlr]->num_slots; ++i) { j = EDMA_CHAN_SLOT(i); if (!test_and_set_bit(j, edma_info[ctlr]->edma_inuse)) { /* Record our current beginning slot */ - if (count == num_params) - stop_param = i; + if (count == num_slots) + stop_slot = i; count--; set_bit(j, tmp_inuse); @@ -534,34 +534,34 @@ static int reserve_contiguous_params(int ctlr, unsigned int id, clear_bit(j, tmp_inuse); if (id == EDMA_CONT_PARAMS_FIXED_EXACT) { - stop_param = i; + stop_slot = i; break; } else - count = num_params; + count = num_slots; } } /* * We have to clear any bits that we set - * if we run out parameter RAMs, i.e we do find a set - * of contiguous parameter RAMs but do not find the exact number - * requested as we may reach the total number of parameter RAMs + * if we run out parameter RAM slots, i.e we do find a set + * of contiguous parameter RAM slots but do not find the exact number + * requested as we may reach the total number of parameter RAM slots */ if (i == edma_info[ctlr]->num_slots) - stop_param = i; + stop_slot = i; - for (j = start_param; j < stop_param; j++) + for (j = start_slot; j < stop_slot; j++) if (test_bit(j, tmp_inuse)) clear_bit(j, edma_info[ctlr]->edma_inuse); if (count) return -EBUSY; - for (j = i - num_params + 1; j <= i; ++j) + for (j = i - num_slots + 1; j <= i; ++j) memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(j), &dummy_paramset, PARM_SIZE); - return EDMA_CTLR_CHAN(ctlr, i - num_params + 1); + return EDMA_CTLR_CHAN(ctlr, i - num_slots + 1); } /*-----------------------------------------------------------------------*/ @@ -759,26 +759,27 @@ EXPORT_SYMBOL(edma_free_slot); /** * edma_alloc_cont_slots- alloc contiguous parameter RAM slots * The API will return the starting point of a set of - * contiguous PARAM's that have been requested + * contiguous parameter RAM slots that have been requested * * @id: can only be EDMA_CONT_PARAMS_ANY or EDMA_CONT_PARAMS_FIXED_EXACT * or EDMA_CONT_PARAMS_FIXED_NOT_EXACT - * @count: number of contiguous Paramter RAM's - * @param - the start value of Parameter RAM that should be passed if id + * @count: number of contiguous Paramter RAM slots + * @slot - the start value of Parameter RAM slot that should be passed if id * is EDMA_CONT_PARAMS_FIXED_EXACT or EDMA_CONT_PARAMS_FIXED_NOT_EXACT * * If id is EDMA_CONT_PARAMS_ANY then the API starts looking for a set of - * contiguous Parameter RAMs from parameter RAM 64 in the case of DaVinci SOCs - * and 32 in the case of Primus + * contiguous Parameter RAM slots from parameter RAM 64 in the case of + * DaVinci SOCs and 32 in the case of DA8xx SOCs. * * If id is EDMA_CONT_PARAMS_FIXED_EXACT then the API starts looking for a - * set of contiguous parameter RAMs from the "param" that is passed as an + * set of contiguous parameter RAM slots from the "slot" that is passed as an * argument to the API. * * If id is EDMA_CONT_PARAMS_FIXED_NOT_EXACT then the API initially tries - * starts looking for a set of contiguous parameter RAMs from the "param" + * starts looking for a set of contiguous parameter RAMs from the "slot" * that is passed as an argument to the API. On failure the API will try to - * find a set of contiguous Parameter RAMs in the remaining Parameter RAMs + * find a set of contiguous Parameter RAM slots from the remaining Parameter + * RAM slots */ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) { @@ -793,7 +794,7 @@ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) return -EINVAL; /* - * The number of parameter RAMs requested cannot be less than 1 + * The number of parameter RAM slots requested cannot be less than 1 * and cannot be more than the number of slots minus the number of * channels */ @@ -803,11 +804,11 @@ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) switch (id) { case EDMA_CONT_PARAMS_ANY: - return reserve_contiguous_params(ctlr, id, count, + return reserve_contiguous_slots(ctlr, id, count, edma_info[ctlr]->num_channels); case EDMA_CONT_PARAMS_FIXED_EXACT: case EDMA_CONT_PARAMS_FIXED_NOT_EXACT: - return reserve_contiguous_params(ctlr, id, count, slot); + return reserve_contiguous_slots(ctlr, id, count, slot); default: return -EINVAL; } @@ -816,14 +817,14 @@ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) EXPORT_SYMBOL(edma_alloc_cont_slots); /** - * edma_free_cont_slots - deallocate DMA parameter RAMs - * @slot: first parameter RAM of a set of parameter RAMs to be freed - * @count: the number of contiguous parameter RAMs to be freed + * edma_free_cont_slots - deallocate DMA parameter RAM slots + * @slot: first parameter RAM of a set of parameter RAM slots to be freed + * @count: the number of contiguous parameter RAM slots to be freed * * This deallocates the parameter RAM slots allocated by * edma_alloc_cont_slots. * Callers/applications need to keep track of sets of contiguous - * parameter RAMs that have been allocated using the edma_alloc_cont_slots + * parameter RAM slots that have been allocated using the edma_alloc_cont_slots * API. * Callers are responsible for ensuring the slots are inactive, and will * not be activated. |